GBJ 134-1990 Civil air defense project construction and acceptance specification GBJ134-90
Some standard content:
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Civil Air Defense Engineering Construction and Acceptance Specification
GBJ134—90
1991Beijing
Engineering Construction Standard Full-text Information System
W Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Civil Air Defense Engineering Construction and Acceptance Specification
GBJ134—90
Editor Department: Approved by the People's Air Defense Committee of the People's Republic of China Department: Ministry of Construction of the People's Republic of China Effective Date: 1991
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on the Release of the National Standard "Construction and Acceptance Specifications for Civil Air Defense Projects"
(90) Jianbiaozi No. 298
According to the notification requirements of the State Planning Commission's Document No. 1 [1985], the "Construction and Acceptance Specifications for Civil Air Defense Projects" jointly formulated by the People's Air Defense Committee of the People's Republic of China and relevant departments has been reviewed by relevant departments. The "Construction and Acceptance Specifications for Civil Air Defense Projects" GBJ134-90 is now approved as a national standard and will be implemented on May 1, 1991. This standard is managed by the People's Air Defense Committee of the People's Republic of China, and its specific interpretation and other work are the responsibility of the Liaoning Provincial Civil Air Defense Office. The publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
June 23, 1990
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Preparation Instructions
This specification is prepared by the Engineering Corps Department of the General Staff, Liaoning Provincial Civil Air Defense Office, Shanghai Civil Air Defense Office and other units in accordance with the notification requirements of the State Planning Commission's No. 19851 document.
In the process of preparing this specification, the relevant policies and guidelines of the national capital construction were implemented, relatively extensive investigations and research and necessary scientific experiments were carried out, the engineering practice experience and scientific research results since the founding of the People's Republic of China were absorbed, relevant domestic and foreign standards and technical materials were referred to, and the opinions of relevant units across the country were solicited. Finally, it was reviewed and finalized by relevant departments. This specification has 15 chapters and two appendices, and its main contents are: General Principles: tunneling, tunnel excavation; construction in bad geological areas, concrete lining; pipe jacking construction; shield construction, underground continuous wall construction, jet grouting pile construction, soil anchor rod construction, tree root pile construction; production and installation of hole protection facilities: installation of pipelines and accessories; equipment installation: anti-corrosion, silencing, and fire prevention of equipment installation projects; acceptance of equipment installation projects, etc. During the implementation of this specification, please pay attention to accumulating information and summarizing experience. If you find that there is a need for modification and supplementation, please send your opinions and relevant information to the Liaoning Provincial Civil Air Defense Engineering Design and Research Institute for reference in future revisions. People's Air Defense Committee of the People's Republic of China June 1990
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 1 General
Chapter 2 Tunnel and Underground Excavation...
Section 1
Section 2
Section 3
Section 4
General Provisions
Construction Survey.
Engineering Excavation
Engineering Acceptance
Chapter 3
Construction in Unfavorable Geological Areas
Section 1
Section 2
Section 3
General Provisions||tt ||Advance anchor support
..00.00
Small duct grouting support
Section 4
Pipe shed support
Chapter 4 Concrete lining
Section 1
Formwork processing and installation
Concrete pouring
Section 2
Section 3
Project acceptance
Chapter 5
Pipe jacking construction
Section 1
Section 2
Section 3
Section 4
Section 5
General provisions
Construction preparation
Pipe jacking||t t||Jumping measurement and deviation correction·
Project acceptance
Chapter VI Shield Construction
Section 1
General provisions
Section 2
Construction preparation
Engineering construction standard full text information system
000++0
.......
Engineering construction standard full text information system
Section 3 Shield Tunneling
Section 4
Section 5
Section 6
Segment assembly and waterproofing treatment
Grouting construction
Project acceptance
Chapter VII
Underground connection Continued wall construction
Section 1
Section 2wwW.bzxz.Net
Section 3
Section 4
Chapter 8
Chapter 9
General provisions
Wall construction
Reverse construction
Project acceptance
Jet grouting pile construction
Soil anchor construction
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Chapter 10
General provisions
Tension anchoring
Project acceptance
c00000 56600065000660600660006Tree root pile method construction
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 11
Reinforcement cage
Tree root pile and foundation connection
Project acceptance
Manufacture and installation of hole protection facilities
(29)
(29)
(39)
(39)
(40)
Manufacture of protective doors, protective closed doors, closed door panels and door frame walls…Section 1 Section
(42)
Section 2
Section 3
Protective doors, protective closed doors, installation of closed doors Packaging, transportation and stacking of protective facilities... Project acceptance
Section 4
Engineering construction standard full text information system
(43)
(43)
(44)
Engineering construction standard full text information system
Chapter 12 Pipeline and accessories installation
Production and installation of closed wall short pipes·
Section 1
Production and installation of ventilation ducts and accessories
Section 2
Section 3 Section
Section 4
Section 5
Chapter 13
Section 1
Section 2
Section 3
Section 4
Chapter 14
Chapter 15
Appendix 1
Appendix 2
Installation of water supply and drainage pipelines, oil supply pipelines and accessoriesInstallation of cables and wires through pipes
Installation of smoke exhaust pipes (ducts) and accessories
Equipment installation
Equipment foundation
Ventilation equipment installation
Water supply and drainage equipment installation
Electrical equipment installation.·
Equipment installation engineering Acceptance of installation works of anti-corrosion, sound-absorbing and fire-proof equipment
Glossary
Explanation of terms used in this specification
Additional explanation
Engineering construction standard full text information system
(45)
(47)
(48)
(49)
(52)
:(55)
(63)
Engineering construction standard full text information system
Chapter 1 General
Article 1.0.1 This specification is formulated to ensure that the construction of civil air defense projects meets the requirements of advanced technology, economic rationality, safety and applicability, quality assurance and combination of peace and war. Article 1.0.2 This specification applies to the construction and acceptance of all types of civil air defense projects that are newly built, expanded and rebuilt.
Article 1.0.3 Before the construction of civil air defense projects, the following documents shall be available: 1. Engineering geological survey report;
2. Complete engineering construction drawings;
3. Drawings and materials of existing underground pipelines and underground structures in the construction area; 4. Approved construction organization design or construction plan; 5. Necessary test data.
Article 1.0.4 The construction of the project shall meet the design requirements. The materials, components and equipment used shall have a factory certificate and meet the product quality standards; when there is no certificate, they shall be inspected and can only be used if they meet the quality requirements. Article 1.0.Article 5 When the construction of the project affects the use and safety of adjacent buildings, structures or pipelines, effective measures should be taken to deal with it. Article 1.0.6 During the construction of the project, records should be made for the hidden projects, and intermediate or sub-item inspections should be carried out. Only after passing the inspection can the next process be carried out. Article 1.0.7 Anti-freezing measures should be taken when the project is constructed in winter. Article 1.0.8 Equipment installation projects should be closely coordinated with civil engineering projects. Equipment installation can only be carried out after the main civil engineering project is completed and inspected. Article 1.0.9 In addition to complying with this specification, the construction and acceptance of civil air defense projects shall also comply with the provisions of the current relevant national standards and specifications. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Chapter 2 Tunnel and Underground Excavation
Section 1 General Provisions
Article 2.1.1 This chapter applies to the excavation construction and acceptance of tunnels and underground tunnels in rock strata.
Article 2.1.2 When excavating pits and underground tunnels that pass through buildings, structures, streets, railways, etc., continuous operation and reliable safety measures should be adopted. Article 2.1.3 The axis direction, elevation, longitudinal slope and mouth position of pits and underground tunnels should all meet the design requirements.
Article 2.1.4 For large-section pits and underground tunnels passing through soft and broken areas, the construction method of advance excavation of pilot tunnels should be adopted. The advance length of the pilot tunnel should be determined after comprehensive technical and economic comparison based on factors such as geological conditions, layout of the pilot tunnel and ventilation conditions. Article 2.1.5 When excavating pits and underground tunnels, comprehensive dust prevention measures such as wet drilling, water spraying and ballast loading and enhanced ventilation should be adopted. Section 2 Construction Measurement
Article 2.2.1 During construction, the axis direction, elevation and distance should be re-measured. The re-survey shall meet the following requirements:
1. When re-surveying the axis direction, each survey point shall be measured more than two times; 2. When re-surveying the elevation, the front and rear sight distances of the leveling measurement should be equal, and the reading of the level rod should be accurate to millimeters.
3. When re-surveying the axis length between the two stakes, a steel ruler should be used for measurement, and the deviation should not exceed 0.2%0.
Article 2.2.2 The mouth measurement shall meet the following requirements: 1. The bottom excavation pile and the upper excavation pile shall be measured according to the mouth center pile; the leveling point shall be set at a location that is obvious and easy to protect, and the elevation mark shall be set; 2. A pair of control center piles shall be set 3m away from the bottom excavation pile and the upper excavation pile.
3. After 5m of excavation at the hole, the stakes shall be buried at the bottom of the hole. Article 2.2.3 The center line and waist line must be marked when excavating tunnels and underground tunnels, and the following requirements shall be met:
1. The direction of tunnels and underground tunnels shall be marked with a theodolite. When the direction is marked with a theodolite, a group of center lines shall be set every 30m, and each group shall not be less than 3, and the spacing between them shall not be less than 2m;
2. The slope of tunnels and underground tunnels shall be marked with a level. When the slope is marked with a level, 3 pairs of waist line points shall be set every 20m, and the spacing between them shall not be less than 2m;3. When excavating tunnels and underground tunnels, the center line and waist line shall be checked every 100m.
Section 3 Engineering Excavation
Article 2.3.1 Smooth blasting shall be used for excavating tunnels and underground tunnels. The blasting parameters of smooth blasting can be adopted according to the following provisions: 1. The depth of the blasthole is 1.8~3.5m;
2. The spacing between the peripheral blastholes is 350~600mm; 3. The density coefficient of the peripheral blastholes is 0.51.0; 4. The diameter of the peripheral blasthole cartridge is 20~25mm; 5. When using No. 2 rock ammonium nitrate explosive, the charge per unit length of the peripheral blasthole is: 70~120g/m for soft rock, 200~300g/m for medium hard rock; 300~350g/m for hard rock.
Article 2.3.2 When excavating through, oblique, or orthogonal tunnels and underground tunnels, accurate measured maps must be available. When the distance between two working faces is less than or equal to 15m, one side of the operation should be stopped.
Article 2.3.3 Drilling operations shall meet the following requirements: 1. The working surface shall be cleared before drilling; Engineering Construction Standard Full Text Information System
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2. Wet drilling method must be used for drilling, and the water pressure shall not be less than 0.3MPa, and the wind pressure shall not be less than 0.5MPa;
3. Drilling along residual blastholes is strictly prohibited.
Article 2.3.4 Blasting operations shall meet the following requirements: 1. It is strictly prohibited to use blasting materials that do not meet product standards; 2. Expired blasting materials must be inspected and can only be used when they meet quality requirements;
3. In areas with groundwater, the blasting materials used shall meet waterproof requirements. Article 2.3.5 Spark detonation or electric detonation should be used for tunnel and underground excavation. When spark ignition is used, each coil of fuse should be cut 50mm at both ends before use, and 1m should be taken from one end for burning rate test. The length of the fuse should be determined based on the time required for the ignition personnel to hide in a safe place after igniting all the fuses, but it must not be less than 1.2m. When electric ignition is used, the conductivity of the electric detonator should be tested before use, and the output current should not be greater than 50mA; in the same blasting network, when the resistance is less than 1.22, the resistance difference of the detonator should not be greater than 0.22; when the resistance is 1.2~22, the resistance difference should not be greater than 0.32; the electric explosion busbar and connecting wire must use insulated wires.
Article 2.3.6 When the stray current value at the construction site is greater than 30mA, electric ignition should not be used. When electric detonation is required due to conditions, the following measures should be taken to prevent stray current:
1. Check the grounding quality of electrical equipment; 2. The blasting wire must not have any damage or exposed joints; 3. Copper bridge wire low-resistance detonators or bridge wire-free detonators should be used, and high-energy detonators should be used for detonation.
Article 2.3.7 The laying of transport tracks shall meet the following requirements: 1. Rail model: manual push bucket car should not be less than 8kg/m, locomotive traction should not be less than 15kg/m;
2. Line slope: manual push bucket car should not exceed 15%o, locomotive traction should not exceed 25%, and the end of the ballast unloading line outside the tunnel should be equipped with a 5% to 10% uphill section; Engineering Construction Standard Full Text Information System
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3. The allowable deviation of the track width should be +6mm and -4mm, the deviation of the rail top elevation should be less than 2mm, and the horizontal deviation of the rail top at the rail joint should be less than 3mm; 4. The track gauge widening value and the outer rail superelevation value of the curved section should meet the requirements of Table 2.3.7;
Track gauge widening value and outer rail superelevation value of the curved section Curve
Track gauge widening value (mm)
Outer rail superwidth value (mm)
5. When using locomotive traction, a tie rod should be added between the two rails of the curved section. Article 2.3.8 When using automobiles for transportation in the tunnel, the slope of the carriageway should not be greater than 12%, the net width of a single lane shall not be less than the vehicle width plus 2m, and the net width of a double lane shall not be less than 2 times the vehicle width plus 2.5m.
Article 2.3.9 The vehicle speed and the distance between the front and rear vehicles shall meet the following requirements: 1. When a locomotive is pulling a train, the speed inside the tunnel shall be less than 2.5m/s; outside the tunnel, the speed shall be less than 3.5m/s. The distance between the front and rear trains shall be greater than 60m. 2. The speed of a manually pushed bucket car shall be less than 1.7m/s, and the distance between the front and rear vehicles shall be greater than 20m.
3. The speed of a manually pushed cart shall be less than 1m/s, and the distance between the front and rear vehicles shall be greater than 7m.
4. The speed of a dump truck inside the tunnel shall be less than 10km/h. Article 2.3.10 Both bucket cars and trolleys shall have reliable braking devices, and it is strictly forbidden to let the car run away.
Engineering Construction Standard Full Text Information System
WArticle 4 For large-section tunnels and underground tunnels through soft and broken areas, it is advisable to adopt the construction method of advance excavation with a pilot hole. The advance length of the pilot hole should be determined after comprehensive technical and economic comparison based on factors such as geological conditions, layout of the pilot hole and ventilation conditions. Article 2.1.5 When excavating tunnels and underground tunnels, comprehensive dust prevention measures such as wet drilling, water spraying and ballast loading and enhanced ventilation should be adopted. Section 2 Construction Measurement
Article 2.2.1 During construction, the axis direction, elevation and distance should be re-measured. The re-measurement should meet the following requirements:
1. When re-measuring the axis direction, each measuring point should be measured more than two times; 2. When re-measuring the elevation, the front and rear sight distances of the leveling measurement should be equal, and the reading of the level rod should be accurate to millimeters,
3. When re-measuring the axis length between two stakes, a steel ruler should be used for measurement, and the deviation should not exceed 0.2%0.
Article 2.2.2 The measurement of the opening shall meet the following requirements: 1. The bottom excavation pile and the upper excavation pile shall be measured and set according to the center pile of the opening; leveling points shall be set at obvious and easy-to-protect locations, and elevation marks shall be set; 2. A pair of control center piles shall be set 3m away from the bottom excavation pile and the upper excavation pile; 3. After 5m of excavation at the opening, a stake shall be buried at the bottom of the opening. Article 2.2.3 The center line and waist line of tunnels and underground tunnels must be marked, and the following requirements shall be met: 1. The direction of the tunnels and underground tunnels shall be marked with a theodolite. When theodolite is used to mark the direction, a group of center lines should be set every 30m, and each group should not be less than 3, and the spacing should not be less than 2m;
2. The level should be used to mark the slope of the tunnel and underground tunnel. When the level is used to mark the slope, 3 pairs of waistline points should be set every 20m, and the spacing should not be less than 2m; 3. When tunnels and underground tunnels are excavated, the center line and waistline should be checked every 100m.
Section 3 Engineering Excavation
Article 2.3.1 Smooth blasting should be used for tunnel and underground tunnel excavation. The blasting parameters of smooth blasting can be adopted according to the following provisions: 1. The depth of the blasthole is 1.8~3.5m;
2. The spacing between the peripheral blastholes is 350~600mm; 3. The density coefficient of the peripheral blastholes is 0.51.0; 4. The diameter of the peripheral blasthole cartridge is 20~25mm; 5. When using No. 2 rock ammonium nitrate explosive, the charge per unit length of the peripheral blasthole is: 70~120g/m for soft rock, 200~300g/m for medium hard rock; 300~350g/m for hard rock.
Article 2.3.2 When excavating through, oblique, or orthogonal tunnels and underground tunnels, accurate measured maps must be available. When the distance between two working faces is less than or equal to 15m, one side of the operation should be stopped.
Article 2.3.3 Drilling operations shall meet the following requirements: 1. The working surface shall be cleared before drilling; Engineering Construction Standard Full Text Information System
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2. Wet drilling method must be used for drilling, and the water pressure shall not be less than 0.3MPa, and the wind pressure shall not be less than 0.5MPa;
3. Drilling along residual blastholes is strictly prohibited.
Article 2.3.4 Blasting operations shall meet the following requirements: 1. It is strictly prohibited to use blasting materials that do not meet product standards; 2. Expired blasting materials must be inspected and can only be used when they meet quality requirements;
3. In areas with groundwater, the blasting materials used shall meet waterproof requirements. Article 2.3.5 Spark detonation or electric detonation should be used for tunnel and underground excavation. When spark ignition is used, each coil of fuse should be cut 50mm at both ends before use, and 1m should be taken from one end for burning rate test. The length of the fuse should be determined based on the time required for the ignition personnel to hide in a safe place after igniting all the fuses, but it must not be less than 1.2m. When electric ignition is used, the conductivity of the electric detonator should be tested before use, and the output current should not be greater than 50mA; in the same blasting network, when the resistance is less than 1.22, the resistance difference of the detonator should not be greater than 0.22; when the resistance is 1.2~22, the resistance difference should not be greater than 0.32; the electric explosion busbar and connecting wire must use insulated wires.
Article 2.3.6 When the stray current value at the construction site is greater than 30mA, electric ignition should not be used. When electric detonation is required due to conditions, the following measures should be taken to prevent stray current:
1. Check the grounding quality of electrical equipment; 2. The blasting wire must not have any damage or exposed joints; 3. Copper bridge wire low-resistance detonators or bridge wire-free detonators should be used, and high-energy detonators should be used for detonation.
Article 2.3.7 The laying of transport tracks shall meet the following requirements: 1. Rail model: manual push bucket car should not be less than 8kg/m, locomotive traction should not be less than 15kg/m;
2. Line slope: manual push bucket car should not exceed 15%o, locomotive traction should not exceed 25%, and the end of the ballast unloading line outside the tunnel should be equipped with a 5% to 10% uphill section; Engineering Construction Standard Full Text Information System
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3. The allowable deviation of the track width should be +6mm and -4mm, the deviation of the rail top elevation should be less than 2mm, and the horizontal deviation of the rail top at the rail joint should be less than 3mm; 4. The track gauge widening value and the outer rail superelevation value of the curved section should meet the requirements of Table 2.3.7;
Track gauge widening value and outer rail superelevation value of the curved section Curve
Track gauge widening value (mm)
Outer rail superwidth value (mm)
5. When using locomotive traction, a tie rod should be added between the two rails of the curved section. Article 2.3.8 When using automobiles for transportation in the tunnel, the slope of the carriageway should not be greater than 12%, the net width of a single lane shall not be less than the vehicle width plus 2m, and the net width of a double lane shall not be less than 2 times the vehicle width plus 2.5m.
Article 2.3.9 The vehicle speed and the distance between the front and rear vehicles shall meet the following requirements: 1. When a locomotive is pulling a train, the speed inside the tunnel shall be less than 2.5m/s; outside the tunnel, the speed shall be less than 3.5m/s. The distance between the front and rear trains shall be greater than 60m. 2. The speed of a manually pushed bucket car shall be less than 1.7m/s, and the distance between the front and rear vehicles shall be greater than 20m.
3. The speed of a manually pushed cart shall be less than 1m/s, and the distance between the front and rear vehicles shall be greater than 7m.
4. The speed of a dump truck inside the tunnel shall be less than 10km/h. Article 2.3.10 Both bucket cars and trolleys shall have reliable braking devices, and it is strictly forbidden to let the car run away.
Engineering Construction Standard Full Text Information System
WArticle 4 For large-section tunnels and underground tunnels through soft and broken areas, it is advisable to adopt the construction method of advance excavation with a pilot hole. The advance length of the pilot hole should be determined after comprehensive technical and economic comparison based on factors such as geological conditions, layout of the pilot hole and ventilation conditions. Article 2.1.5 When excavating tunnels and underground tunnels, comprehensive dust prevention measures such as wet drilling, water spraying and ballast loading and enhanced ventilation should be adopted. Section 2 Construction Measurement
Article 2.2.1 During construction, the axis direction, elevation and distance should be re-measured. The re-measurement should meet the following requirements:
1. When re-measuring the axis direction, each measuring point should be measured more than two times; 2. When re-measuring the elevation, the front and rear sight distances of the leveling measurement should be equal, and the reading of the level rod should be accurate to millimeters,
3. When re-measuring the axis length between two stakes, a steel ruler should be used for measurement, and the deviation should not exceed 0.2%0.
Article 2.2.2 The measurement of the opening shall meet the following requirements: 1. The bottom excavation pile and the upper excavation pile shall be measured and set according to the center pile of the opening; leveling points shall be set at obvious and easy-to-protect locations, and elevation marks shall be set; 2. A pair of control center piles shall be set 3m away from the bottom excavation pile and the upper excavation pile; 3. After 5m of excavation at the opening, a stake shall be buried at the bottom of the opening. Article 2.2.3 The center line and waist line of tunnels and underground tunnels must be marked, and the following requirements shall be met: 1. The direction of the tunnels and underground tunnels shall be marked with a theodolite. When theodolite is used to mark the direction, a group of center lines should be set every 30m, and each group should not be less than 3, and the spacing should not be less than 2m;
2. The level should be used to mark the slope of the tunnel and underground tunnel. When the level is used to mark the slope, 3 pairs of waistline points should be set every 20m, and the spacing should not be less than 2m; 3. When tunnels and underground tunnels are excavated, the center line and waistline should be checked every 100m.
Section 3 Engineering Excavation
Article 2.3.1 Smooth blasting should be used for tunnel and underground tunnel excavation. The blasting parameters of smooth blasting can be adopted according to the following provisions: 1. The depth of the blasthole is 1.8~3.5m;
2. The spacing between the peripheral blastholes is 350~600mm; 3. The density coefficient of the peripheral blastholes is 0.51.0; 4. The diameter of the peripheral blasthole cartridge is 20~25mm; 5. When using No. 2 rock ammonium nitrate explosive, the charge per unit length of the peripheral blasthole is: 70~120g/m for soft rock, 200~300g/m for medium hard rock; 300~350g/m for hard rock.
Article 2.3.2 When excavating through, oblique, or orthogonal tunnels and underground tunnels, accurate measured maps must be available. When the distance between two working faces is less than or equal to 15m, one side of the operation should be stopped.
Article 2.3.3 Drilling operations shall meet the following requirements: 1. The working surface shall be cleared before drilling; Engineering Construction Standard Full Text Information System
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2. Wet drilling method must be used for drilling, and the water pressure shall not be less than 0.3MPa, and the wind pressure shall not be less than 0.5MPa;
3. Drilling along residual blastholes is strictly prohibited.
Article 2.3.4 Blasting operations shall meet the following requirements: 1. It is strictly prohibited to use blasting materials that do not meet product standards; 2. Expired blasting materials must be inspected and can only be used when they meet quality requirements;
3. In areas with groundwater, the blasting materials used shall meet waterproof requirements. Article 2.3.5 Spark detonation or electric detonation should be used for tunnel and underground excavation. When spark ignition is used, each coil of fuse should be cut 50mm at both ends before use, and 1m should be taken from one end for burning rate test. The length of the fuse should be determined based on the time required for the ignition personnel to hide in a safe place after igniting all the fuses, but it must not be less than 1.2m. When electric ignition is used, the conductivity of the electric detonator should be tested before use, and the output current should not be greater than 50mA; in the same blasting network, when the resistance is less than 1.22, the resistance difference of the detonator should not be greater than 0.22; when the resistance is 1.2~22, the resistance difference should not be greater than 0.32; the electric explosion busbar and connecting wire must use insulated wires.
Article 2.3.6 When the stray current value at the construction site is greater than 30mA, electric ignition should not be used. When electric detonation is required due to conditions, the following measures should be taken to prevent stray current:
1. Check the grounding quality of electrical equipment; 2. The blasting wire must not have any damage or exposed joints; 3. Copper bridge wire low-resistance detonators or bridge wire-free detonators should be used, and high-energy detonators should be used for detonation.
Article 2.3.7 The laying of transport tracks shall meet the following requirements: 1. Rail model: manual push bucket car should not be less than 8kg/m, locomotive traction should not be less than 15kg/m;
2. Line slope: manual push bucket car should not exceed 15%o, locomotive traction should not exceed 25%, and the end of the ballast unloading line outside the tunnel should be equipped with a 5% to 10% uphill section; Engineering Construction Standard Full Text Information System
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3. The allowable deviation of the track width should be +6mm and -4mm, the deviation of the rail top elevation should be less than 2mm, and the horizontal deviation of the rail top at the rail joint should be less than 3mm; 4. The track gauge widening value and the outer rail superelevation value of the curved section should meet the requirements of Table 2.3.7;
Track gauge widening value and outer rail superelevation value of the curved section Curve
Track gauge widening value (mm)
Outer rail superwidth value (mm)
5. When using locomotive traction, a tie rod should be added between the two rails of the curved section. Article 2.3.8 When using automobiles for transportation in the tunnel, the slope of the carriageway should not be greater than 12%, the net width of a single lane shall not be less than the vehicle width plus 2m, and the net width of a double lane shall not be less than 2 times the vehicle width plus 2.5m.
Article 2.3.9 The vehicle speed and the distance between the front and rear vehicles shall meet the following requirements: 1. When a locomotive is pulling a train, the speed inside the tunnel shall be less than 2.5m/s; outside the tunnel, the speed shall be less than 3.5m/s. The distance between the front and rear trains shall be greater than 60m. 2. The speed of a manually pushed bucket car shall be less than 1.7m/s, and the distance between the front and rear vehicles shall be greater than 20m.
3. The speed of a manually pushed cart shall be less than 1m/s, and the distance between the front and rear vehicles shall be greater than 7m.
4. The speed of a dump truck inside the tunnel shall be less than 10km/h. Article 2.3.10 Both bucket cars and trolleys shall have reliable braking devices, and it is strictly forbidden to let the car run away.
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W0; 4. The diameter of the peripheral blasthole charge is 20-25mm; 5. When using No. 2 rock ammonium nitrate explosive, the charge per unit length of the peripheral blasthole is: 70-120g/m for soft rock, 200-300g/m for medium hard rock, and 300-350g/m for hard rock.
Article 2.3.2 When excavating through, oblique, or orthogonal tunnels and underground tunnels, accurate actual measurement maps must be available. When the distance between two working faces is less than or equal to 15m, one side of the work should be stopped.
Article 2.3.3 Drilling operations shall meet the following requirements: 1. The working surface shall be cleared before drilling; Engineering Construction Standard Full Text Information System
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2. Wet drilling method must be used for drilling, and the water pressure shall not be less than 0.3MPa, and the wind pressure shall not be less than 0.5MPa;
3. Drilling along residual blastholes is strictly prohibited.
Article 2.3.4 Blasting operations shall meet the following requirements: 1. It is strictly prohibited to use blasting materials that do not meet product standards; 2. Expired blasting materials must be inspected and can only be used when they meet quality requirements;
3. In areas with groundwater, the blasting materials used shall meet waterproof requirements. Article 2.3.5 Spark detonation or electric detonation should be used for tunnel and underground excavation. When spark ignition is used, each coil of fuse should be cut 50mm at both ends before use, and 1m should be taken from one end for burning rate test. The length of the fuse should be determined based on the time required for the ignition personnel to hide in a safe place after igniting all the fuses, but it must not be less than 1.2m. When electric ignition is used, the conductivity of the electric detonator should be tested before use, and the output current should not be greater than 50mA; in the same blasting network, when the resistance is less than 1.22, the resistance difference of the detonator should not be greater than 0.22; when the resistance is 1.2~22, the resistance difference should not be greater than 0.32; the electric explosion busbar and connecting wire must use insulated wires.
Article 2.3.6 When the stray current value at the construction site is greater than 30mA, electric ignition should not be used. When electric detonation is required due to conditions, the following measures should be taken to prevent stray current:
1. Check the grounding quality of electrical equipment; 2. The blasting wire must not have any damage or exposed joints; 3. Copper bridge wire low-resistance detonators or bridge wire-free detonators should be used, and high-energy detonators should be used for detonation.
Article 2.3.7 The laying of transport tracks shall meet the following requirements: 1. Rail model: manual push bucket car should not be less than 8kg/m, locomotive traction should not be less than 15kg/m;
2. Line slope: manual push bucket car should not exceed 15%o, locomotive traction should not exceed 25%, and the end of the ballast unloading line outside the tunnel should be equipped with a 5% to 10% uphill section; Engineering Construction Standard Full Text Information System
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3. The allowable deviation of the track width should be +6mm and -4mm, the deviation of the rail top elevation should be less than 2mm, and the horizontal deviation of the rail top at the rail joint should be less than 3mm; 4. The track gauge widening value and the outer rail superelevation value of the curved section should meet the requirements of Table 2.3.7;
Track gauge widening value and outer rail superelevation value of the curved section Curve
Track gauge widening value (mm)
Outer rail superwidth value (mm)
5. When using locomotive traction, a tie rod should be added between the two rails of the curved section. Article 2.3.8 When using automobiles for transportation in the tunnel, the slope of the carriageway should not be greater than 12%, the net width of a single lane shall not be less than the vehicle width plus 2m, and the net width of a double lane shall not be less than 2 times the vehicle width plus 2.5m.
Article 2.3.9 The vehicle speed and the distance between the front and rear vehicles shall meet the following requirements: 1. When a locomotive is pulling a train, the speed inside the tunnel shall be less than 2.5m/s; outside the tunnel, the speed shall be less than 3.5m/s. The distance between the front and rear trains shall be greater than 60m. 2. The speed of a manually pushed bucket car shall be less than 1.7m/s, and the distance between the front and rear vehicles shall be greater than 20m.
3. The speed of a manually pushed cart shall be less than 1m/s, and the distance between the front and rear vehicles shall be greater than 7m.
4. The speed of a dump truck inside the tunnel shall be less than 10km/h. Article 2.3.10 Both bucket cars and trolleys shall have reliable braking devices, and it is strictly forbidden to let the car run away.
Engineering Construction Standard Full Text Information System
W0; 4. The diameter of the peripheral blasthole charge is 20-25mm; 5. When using No. 2 rock ammonium nitrate explosive, the charge per unit length of the peripheral blasthole is: 70-120g/m for soft rock, 200-300g/m for medium hard rock, and 300-350g/m for hard rock.
Article 2.3.2 When excavating through, oblique, or orthogonal tunnels and underground tunnels, accurate actual measurement maps must be available. When the distance between two working faces is less than or equal to 15m, one side of the work should be stopped.
Article 2.3.3 Drilling operations shall meet the following requirements: 1. The working surface shall be cleared before drilling; Engineering Construction Standard Full Text Information System
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2. Wet drilling method must be used for drilling, and the water pressure shall not be less than 0.3MPa, and the wind pressure shall not be less than 0.5MPa;
3. Drilling along residual blastholes is strictly prohibited.
Article 2.3.4 Blasting operations shall meet the following requirements: 1. It is strictly prohibited to use blasting materials that do not meet product standards; 2. Expired blasting materials must be inspected and can only be used when they meet quality requirements;
3. In areas with groundwater, the blasting materials used shall meet waterproof requirements. Article 2.3.5 Spark detonation or electric detonation should be used for tunnel and underground excavation. When spark ignition is used, each coil of fuse should be cut 50mm at both ends before use, and 1m should be taken from one end for burning rate test. The length of the fuse should be determined based on the time required for the ignition personnel to hide in a safe place after igniting all the fuses, but it must not be less than 1.2m. When electric ignition is used, the conductivity of the electric detonator should be tested before use, and the output current should not be greater than 50mA; in the same blasting network, when the resistance is less than 1.22, the resistance difference of the detonator should not be greater than 0.22; when the resistance is 1.2~22, the resistance difference should not be greater than 0.32; the electric explosion busbar and connecting wire must use insulated wires.
Article 2.3.6 When the stray current value at the construction site is greater than 30mA, electric ignition should not be used. When electric detonation is required due to conditions, the following measures should be taken to prevent stray current:
1. Check the grounding quality of electrical equipment; 2. The blasting wire must not have any damage or exposed joints; 3. Copper bridge wire low-resistance detonators or bridge wire-free detonators should be used, and high-energy detonators should be used for detonation.
Article 2.3.7 The laying of transport tracks shall meet the following requirements: 1. Rail model: manual push bucket car should not be less than 8kg/m, locomotive traction should not be less than 15kg/m;
2. Line slope: manual push bucket car should not exceed 15%o, locomotive traction should not exceed 25%, and the end of the ballast unloading line outside the tunnel should be equipped with a 5% to 10% uphill section; Engineering Construction Standard Full Text Information System
W. Engineering Construction Standard Full Text Information System
3. The allowable deviation of the track width should be +6mm and -4mm, the deviation of the rail top elevation should be less than 2mm, and the horizontal deviation of the rail top at the rail joint should be less than 3mm; 4. The track gauge widening value and the outer rail superelevation value of the curved section should meet the requirements of Table 2.3.7;
Track gauge widening value and outer rail superelevation value of the curved section Curve
Track gauge widening value (mm)
Outer rail superwidth value (mm)
5. When using locomotive traction, a tie rod should be added between the two rails of the curved section. Article 2.3.8 When using automobiles for transportation in the tunnel, the slope of the carriageway should not be greater than 12%, the net width of a single lane shall not be less than the vehicle width plus 2m, and the net width of a double lane shall not be less than 2 times the vehicle width plus 2.5m.
Article 2.3.9 The vehicle speed and the distance between the front and rear vehicles shall meet the following requirements: 1. When a locomotive is pulling a train, the speed inside the tunnel shall be less than 2.5m/s; outside the tunnel, the speed shall be less than 3.5m/s. The distance between the front and rear trains shall be greater than 60m. 2. The speed of a manually pushed bucket car shall be less than 1.7m/s, and the distance between the front and rear vehicles shall be greater than 20m.
3. The speed of a manually pushed cart shall be less than 1m/s, and the distance between the front and rear vehicles shall be greater than 7m.
4. The speed of a dump truck inside the tunnel shall be less than 10km/h. Article 2.3.10 Both bucket cars and trolleys shall have reliable braking devices, and it is strictly forbidden to let the car run away.
Engineering Construction Standard Full Text Information System
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