GBJ 208-1983 Specification for construction and acceptance of underground waterproofing projects GBJ208-83
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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Specification for Construction and Acceptance of Underground Waterproof Engineering
GBJ208—83
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National Standard of the People's Republic of China
Specification for Construction and Acceptance of Underground Waterproof Engineering
GBJ208—83
Editor: Shanxi
Approval Unit: Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China Reported to the State Planning Commission of the People's Republic of China for record Implementation Date: 1983
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Notice on the approval and issuance of "Roofing Engineering Construction and Acceptance Specification" and "Underground Waterproofing Engineering Construction and Acceptance Specification"
(83) Chengkezi No. 282
The national standard "Roofing and Waterproofing and Insulation Engineering Construction and Acceptance Specification" (GBJ16-66 [Revised Edition]), which was edited by the former Ministry of Construction, approved and reported to the former State Construction Commission for filing, was handed over to the Shanxi Provincial Construction Commission and edited by the Construction Engineering Bureau. Together with relevant scientific research, design, construction and teaching units, it was revised and renamed and divided into "Roofing Engineering Construction and Acceptance Specification" (GBJ207-83) and "Underground Waterproofing Engineering Construction and Acceptance Specification" (GBJ208-83). These two specifications have been reviewed and finalized, and are now approved for issuance and reported to the State Planning Commission for filing. They will be implemented from December 1, 1983. The management and interpretation of the specifications shall be the responsibility of the "Roofing and Underground Waterproofing Engineering Construction Specification Management Group" of the Shanxi Provincial Construction Engineering Bureau. I hope to tell them the problems and opinions in the implementation for reference when revising again. Ministry of Urban and Rural Construction and Environmental Protection
May 5, 1983
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Revision Notes
According to the spirit of the former State Construction Commission (79) Jianfa Shi Zi No. 168 and the former State Construction Engineering Bureau (80) Jian Gong Ke Zi No. 385, "Roofing and Waterproofing and Insulation Engineering Construction and Acceptance Specification" GBJ16-66 (Revised Edition) was edited by the Shanxi Provincial Construction Bureau as the main editing unit, and the provincial and municipal construction bureaus of Anhui, Heilongjiang, Gansu, Guangxi, Shaanxi, Henan, Tianjin, and the Ministry of Railways, the Ministry of Metallurgy and other nine units participated in the joint revision.
This revision is based on the spirit of seeking truth from facts, and it should not only adapt to the current construction technology level, but also take into account the possibility of future development. All the clauses that have been effective for many years and are in line with the current actual situation and construction level will be retained; all the clauses that are outdated or replaced by new materials and new processes will be deleted; the clauses that are unclear, technical data are not accurate, or the process has been improved will be revised; new technologies that have been tested in long-term practice and formally identified by the state and are technically advanced, economically reasonable, and have a promising future will be added to the specifications.
In May 1980, a technical symposium attended by 27 units from relevant provinces and cities was held to widely listen to opinions and modification suggestions on the original specifications. After nationwide investigation and research and necessary test work, the first draft was compiled and the preliminary review meeting was held in Liuzhou City in October 1980. Based on the collation and analysis of the data, the draft for soliciting opinions was written and sent to various regions and relevant units across the country for extensive comments. According to the opinions of various regions, the final draft was proposed after revision, and the review meeting was held in Zhenjiang City, Jiangsu Province in September 1981. Forty-six units from 23 provinces and cities across the country participated. According to the opinions of the review meeting, revisions and supplements were made. At the review and finalization meeting held in Jingzhou, Hubei Province in December 1982, it was determined that it would be divided into "Roofing Engineering Construction and Acceptance Specifications" and "Underground Waterproofing Engineering Construction and Acceptance Specifications". Two books.
After review and finalization, the "Specifications for Construction and Acceptance of Underground Waterproofing Projects" consists of 4 chapters, 8 sections and 63 articles. The main revisions are: Waterproof concrete is the main form of underground waterproofing in my country. The revised specifications stipulate the cement grade used, the minimum unit amount of cement, the water-cement ratio, the sand content, the cement-sand ratio and other control indicators. In addition, based on relevant foreign information and domestic engineering practices, the content of seepage drainage and blind ditch drainage has been added, and the content of post-cast joints has been added to the detailed structure.
Due to our limited level, the research work is not in-depth enough, and the test data is not perfect enough. If there are any undesirable parts, we hope that the user unit will inform the "Roof and Underground Waterproofing Project Construction Specification Management Group" of the Shanxi Provincial Construction Bureau at any time so that it can be supplemented or corrected in the next revision.
Shanxi Provincial Construction Bureau
1982 Che December
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Chapter 1
General Principles·
Chapter 2
Underground Waterproof Engineering
Section 1
General Provisions
Section 2 Waterproof Concrete Structure
Section 3 Cement Mortar Waterproof Layer
Section 4 Rolled Waterproof Layer…
Asphalt Binder Waterproof Layer
Section 5
Section 6
Section 7
Metal Waterproof Layer
Detailed Structure
Protective Layer of Waterproof Layer
Section 8
Chapter 3
Chapter 4
Appendix—
Appendix 2||t t||Appendix III
Seepage drainage, blind ditch drainage
Project acceptance
Standard Catalog…
Term comparison table
Specification of terms used in the specification
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Chapter I General
Article 1.0.1 This specification applies to the construction and acceptance of underground waterproofing projects for industrial and civil buildings.
Note: Underground waterproofing projects for special buildings should be constructed and accepted in accordance with design requirements or special technical regulations.
Article 1.0.2 In the construction of underground waterproofing projects, when other projects need to be carried out in conjunction, in addition to complying with the provisions of this specification, matters not specified in this specification shall be implemented in accordance with other current relevant engineering construction and acceptance specifications.
Article 1.0.3 The structure of underground waterproofing projects must comply with design requirements. If there are no design requirements, they should comply with the provisions of this specification. Article 1.0.4 All kinds of raw materials, products and accessories shall meet the design requirements and must comply with the provisions of the current national standards or ministerial standards. They shall have quality certification documents before use, and shall be inspected and recorded during the construction process.
The ingredients and preparation methods of various mixtures shall meet the design requirements and be determined through tests with reference to the appendix of this specification and relevant technical standards. Article 1.0.5 The construction of underground waterproofing projects must comply with the "Safety Technical Regulations for Building Installation Projects" issued by the State Council and the "Measures for Preventing Asphalt Poisoning" issued by the Ministry of Labor and other special regulations on safety and fire prevention.
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Chapter II Underground Waterproofing Projects
Section I General Provisions
Article 2.1.1 The waterproof concrete structure, various waterproof layers, seepage drainage and blind ditch drainage of underground waterproofing projects shall be constructed after the foundation or structure is accepted.
Article 2.1.2 During the construction of underground waterproofing projects, drainage work should continue and comply with the following regulations:
1. During the construction of waterproofing projects, the groundwater level should be lowered to below the lowest elevation of the bottom of the waterproofing project, not less than 300 mm, until the waterproofing project is completed.
2. The surface water around the foundation pit must be removed or controlled and must not flow into the foundation pit;
3. There should be no accumulation of water in the foundation pit. If there is accumulation of water, it should be removed. It is strictly forbidden to carry out waterproofing construction with water or mud. 4. The foundation soil should be avoided during drainage.
Article 2.1.3 When using a water pump to drain water from the foundation pit to lower the groundwater level, the water collection well should be set outside the edge of the bottom plane of the waterproofing project, and the appropriate distance should be selected according to the soil conditions, and the foundation pit and the layer structure near the foundation pit should not be damaged.
If the bottom surface area of the waterproof project is large, in order to effectively lower the groundwater level, it is necessary to collect water and set it within the bottom plane of the waterproof project. A water collection well that can be tightly connected to the waterproof layer should be used, and at the end of the drainage work, the well should be filled with concrete, and then the well mouth should be sealed with bolts or welding. Engineering Construction Standard Full Text Information System
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Article 2.1.4 When the underground waterproof layer needs to be passed through by pipes, equipment or embedded parts, waterproof treatment should be done at the passing point. After the construction of the underground waterproof layer is completed, it should be avoided to drill holes on it. Article 2.1.Article 5 During the construction of underground waterproofing projects, sub-project inspections should be carried out according to the progress of the project and records should be kept. Concealed projects should be accepted before construction can continue.
When the next process or adjacent project is under construction, the completed part of the underground waterproofing project should be properly protected to prevent damage. Section 2 Waterproof Concrete Structure
Article 2.2.1 Waterproof concrete structure refers to an integral concrete or reinforced concrete load-bearing structure that has a certain waterproof ability. It is suitable for waterproof buildings such as basements, pools, underground water pump rooms, and equipment foundations. Article 2.2.2 Waterproof concrete structures should use ordinary waterproof concrete or waterproof concrete mixed with admixtures.
When waterproof concrete is used in corrosive media, its corrosion resistance coefficient should not be less than 0.8.
Note: The corrosion resistance coefficient of concrete is the ratio of the flexural strength of concrete test blocks cured in corrosive media and in drinking water for six months.
Article 2.2.3 The materials used for waterproof concrete shall comply with the following provisions:
1. Cement: The grade should not be lower than 425. When not subject to corrosive media and freeze-thaw effects, ordinary Portland cement, pozzolanic Portland cement, and fly ash Portland cement should be used. If admixtures are added, slag Portland cement can also be used. When subject to corrosive media, cement should be selected according to design requirements. bzxz.net
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When subject to freeze-thaw effects, ordinary Portland cement should be used first, and pozzolanic Portland cement and fly ash Portland cement should not be used. 2. Sand and stone: In addition to meeting the requirements of "Quality Standard and Test Method for Sand for Ordinary Concrete" (JGJ52-79) and "Quality Standard and Test Method for Crushed Stone or Pebbles for Ordinary Concrete" (JGJ53-79), the technical indicators of sand and stone used in concrete shall also meet the following requirements: the maximum particle size of the stone should not be greater than 40 mm, the soil contained should not be in block form or wrap the surface of the stone, and the water absorption rate should not be greater than 1.5%. 3. Water: clean water without harmful substances. 4. Admixtures: water reducing agent, air entraining agent, waterproofing agent and expansion agent should be used according to the specific situation.
Article 2.2.4 The mix ratio of waterproof concrete should be selected through experiments. When selecting the mix ratio, the anti-seepage grade required by the design should be increased by 2 kgf/cm2, and other technical indicators should meet the following requirements: 1. The amount of cement used per cubic meter of concrete (including fine powder) should not be less than 320 kg; 2. The sand content should be 35-40%, and the ash-sand ratio should be 1:2~1:2.5; 3. The water-cement ratio should not be greater than 0.6; 4. The slump should not be greater than 5 cm; if admixtures are added or pumped concrete is used, this limit does not apply; 5. The air content of waterproof concrete mixed with air-entraining admixtures should be controlled at 3~5%. Article 2.2.5 During the construction of waterproof concrete structures, the iron wire and bolts used to fix the formwork should not pass through the waterproof concrete structure. All kinds of steel bars and binding wires set inside the structure shall not contact the formwork. If the bolts used to fix the formwork must pass through the waterproof concrete structure, water-stopping measures should be taken. Generally, the following methods are adopted: 1. Weld a water-stop ring on the bolt or sleeve. The water stop ring must be fully welded, and the number of rings should meet the design requirements, see Figure 2.2.5-1, 2.2.5-2; M
Figure 2.2.5-1 Bolts and welded water stop rings
1—Waterproof building; 2—Template, 3—
Water stop ring, 4—Bolt, 5—Large keel
, 6—Small keel
Figure 2.2.5-2 Embedded casing
1—Waterproof structure; 2—Template, 3—Water stop ring, 4—Bolt; 5—Large keel; 6—Small keel, 7—Embedded casing (Pull out the bolts after removing the mold, and seal the casing with expanding cement mortar) 2. Bolts and plugs, see Figure 2.2.5-3. Figure 2.2.5-3 Bolts and plugs
1—Waterproof building, 2—Formwork; 3
Water stop ring; 4—Bolt, 5—Plug (After removing the formwork, cut off the bolts along the bottom of the flat pit,
Then seal with expansive cement mortar); 6—
Small keel, 7—Large keel
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Article 2.2.6 Waterproof concrete shall be mechanically mixed, and the mixing time shall not be less than 2 minutes. The mixing time of waterproof concrete with admixtures shall be selected according to the technical requirements of the admixtures.
Waterproof concrete shall be mechanically vibrated and compacted. Article 2.2.7 Bottom plate concrete shall be poured continuously, and construction joints shall not be left.
Only horizontal construction joints are generally allowed in the wall. The location should not be at the maximum shear force and bending moment or at the junction of the bottom plate and the side wall. It is generally advisable to leave it on the wall that is not less than 200 mm above the upper surface of the bottom plate. When there are holes in the wall, the construction joint should not be less than 300 mm from the edge of the hole. If vertical construction joints must be left, they should be left at the deformation joints of the structure. The joint form of the construction joint can be selected according to Figure 2.2.7. Metal water stop
Figure 2.2.7 Construction joint joint form
Before continuing to pour concrete on the construction joint, the concrete surface at the construction joint should be roughened, floating particles and debris should be removed, rinsed with water, kept moist, and then a layer of 20-25 mm thick cement mortar should be laid. The material used for cement mortar is Engineering 6 Construction Standard Full Text Information System
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Figure 2.2.5-1 Bolts and welded water stop rings
1—Waterproof building; 2—Template, 3—
Water stop ring, 4—Bolt, 5—Large keel
Bone, 6—Small keel
Figure 2.2.5-2 Embedded casing
1—Waterproof structure; 2—Template, 3—Water stop ring, 4—Bolt; 5—Large keel; 6—Small keel, 7—Embedded casing (Pull out the bolts after removing the mold, and seal the inside of the casing with expanding cement mortar) 2. Bolts and plugs, see Figure 2.2.5-3. Figure 2.2.5-3 Bolts and plugs
1—Waterproof building, 2—Formwork; 3
Water stop ring; 4—Bolt, 5—Plug (After removing the formwork, cut off the bolts along the bottom of the flat pit,
Then seal with expansive cement mortar); 6—
Small keel, 7—Large keel
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Article 2.2.6 Waterproof concrete shall be mechanically mixed, and the mixing time shall not be less than 2 minutes. The mixing time of waterproof concrete with admixtures shall be selected according to the technical requirements of the admixtures.
Waterproof concrete shall be mechanically vibrated and compacted. Article 2.2.7 Bottom plate concrete shall be poured continuously, and construction joints shall not be left.
Only horizontal construction joints are generally allowed in the wall. The location should not be at the maximum shear force and bending moment or at the junction of the bottom plate and the side wall. It is generally advisable to leave it on the wall that is not less than 200 mm above the upper surface of the bottom plate. When there are holes in the wall, the construction joint should not be less than 300 mm from the edge of the hole. If vertical construction joints must be left, they should be left at the deformation joints of the structure. The joint form of the construction joint can be selected according to Figure 2.2.7. Metal water stop
Figure 2.2.7 Construction joint joint form
Before continuing to pour concrete on the construction joint, the concrete surface at the construction joint should be roughened, floating particles and debris should be removed, rinsed with water, kept moist, and then a layer of 20-25 mm thick cement mortar should be laid. The material used for cement mortar is Engineering 6 Construction Standard Full Text Information System
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Figure 2.2.5-1 Bolts and welded water stop rings
1—Waterproof building; 2—Template, 3—
Water stop ring, 4—Bolt, 5—Large keel
Bone, 6—Small keel
Figure 2.2.5-2 Embedded casing
1—Waterproof structure; 2—Template, 3—Water stop ring, 4—Bolt; 5—Large keel; 6—Small keel, 7—Embedded casing (Pull out the bolts after removing the mold, and seal the inside of the casing with expanding cement mortar) 2. Bolts and plugs, see Figure 2.2.5-3. Figure 2.2.5-3 Bolts and plugs
1—Waterproof building, 2—Formwork; 3
Water stop ring; 4—Bolt, 5—Plug (After removing the formwork, cut off the bolts along the bottom of the flat pit,
Then seal with expansive cement mortar); 6—
Small keel, 7—Large keel
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Article 2.2.6 Waterproof concrete shall be mechanically mixed, and the mixing time shall not be less than 2 minutes. The mixing time of waterproof concrete with admixtures shall be selected according to the technical requirements of the admixtures.
Waterproof concrete shall be mechanically vibrated and compacted. Article 2.2.7 Bottom plate concrete shall be poured continuously, and construction joints shall not be left.
Only horizontal construction joints are generally allowed in the wall. The location should not be at the maximum shear force and bending moment or at the junction of the bottom plate and the side wall. It is generally advisable to leave it on the wall that is not less than 200 mm above the upper surface of the bottom plate. When there are holes in the wall, the construction joint should not be less than 300 mm from the edge of the hole. If vertical construction joints must be left, they should be left at the deformation joints of the structure. The joint form of the construction joint can be selected according to Figure 2.2.7. Metal water stop
Figure 2.2.7 Construction joint joint form
Before continuing to pour concrete on the construction joint, the concrete surface at the construction joint should be roughened, floating particles and debris should be removed, rinsed with water, kept moist, and then a layer of 20-25 mm thick cement mortar should be laid. The material used for cement mortar is Engineering 6 Construction Standard Full Text Information System
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