Some standard content:
National Standard of the People's Republic of China
Cireular reinforced concrete pole
Cireular reinforced concrete pole1 Subject content and scope of application
GB 396:-94
Replaces GB 396-84
This standard defines the product classification, technical requirements, test methods, inspection rules, marking and factory acceptance certification, storage and transportation of circular reinforced concrete poles.
This standard applies to poles, lighting pillars and signal transmission poles for power, communication and overhead contact lines. It does not include other components of the pole, such as cross arms, chucks, chassis and other accessories. 2 Reference standards
Portland cement, ordinary Portland cement
GB 700
GB 1344
GB 1499
GB8076
Rapid hardening Portland cement
Carbon structural steel
Carbon steel hot-rolled round wire rod
Sulfate-resistant Portland cement
Slag Portland cement, pozzolanic Portland cement and fly ash Portland cement Hot-rolled ribbed steel bars for reinforced concrete
Concrete admixtures
GB/T 14684 Sand for construction
GR/F14685 Pebbles and crushed stones for construction
GB J10
GBJ!07
Concrete structure design code
Test method for mechanical properties of ordinary concrete
Standard for strength test and evaluation of concrete
GB 1204
GB1321
Concrete construction and acceptance code
Standard for quality test and evaluation of precast concrete components JGJ63 Standard for water used in concrete mixing
3 Terms
3.1 Standard test load (P)
Test value of short-term load during normal use.
3-2 Standard test bending moment (Mk)
Test value of bending moment at the test section of the pole under the standard test load. 3.3 Bearing capacity test bending moment (ML)
The test value of the bending moment at the test section of the pole under the bearing capacity test load. 3.4 Crevices
Approved by the State Technical Supervision Bureau in 1994-1222
Implemented on August 1, 1995
The surface of the pole has cracks in the concrete. 3.5 Leakage
The cement slurry on the surface of the pole is lost, exposing sand and stone. 3.6 Leakage
GB396 94
The defect that the steel bars inside the pole are not wrapped by concrete and exposed. 3.7 Collapse
The whole concrete inside the pole falls off in blocks.
3.8 Honeycomb
The defect that the concrete surface has stone exterior due to slurry or lack of cement mortar. 3.9 Pockmarks
The surface of the pole has dense micropores.
3.10 Sticky
The cement slurry layer on the outer surface of the pole is removed, revealing an uneven structural layer. 3.11 Cracking
The surface of the pole shows a turtle-back pattern: no neat edges and obvious depth, 3.12 Water lines
When water penetrates into the concrete, there are visible fine lines on the surface. After the water evaporates, the lines disappear. 4 Product classification
4.1 Products are divided into tapered rods (taper is 1:75) and equal-diameter rods according to their appearance, as shown in Figure 1: Carved
Equal-diameter rods
L-rod length, L-load point height: L-support point height, L-pin end to load point ratio is 0.25m); D-root diameter or diameter-pin diameter-wall
4.2 Dimensional rods are whole and assembled. The segment series of tapered poles are shown in Figure 24.3. The tip diameter (or diameter), length, standard test load and standard test bending moment of the pole are shown in Tables 1, 2 and 3. I
Analysis section length 1
Rod section diameter, ms
-4 277
Conical rod rod section series diagram
6.0 (length m)
(pin diameter,)
(root diameter, nan)
Annular load F
L.mLi.raLix
7. 0 5. 55
10.50[8.05
11.001 8. 85
1:102.568
13. co10.55
15.6012.25;2.50
3. 331 4.16
GB 39694
3. H65. 15
Table] Standard of the whole shape identification rod
9. 5 10. 69 11. 86
s.01 10. 30111. 59,12.88
8. 32 1 5. 73 | | tt | | 11.2612.4913.39 | 06 |10. 8812. 69
13.70j15.4117.12
12.0814.0916.1018.1120.12
Note: The standard test load is equal to the standard test load multiplied by the height of the load point. The pole bearing capacity test is Mu=8JMk,>.—The allowable value of the comprehensive bearing capacity test coefficient is 2.0, QQ, A, B, C, D... are the codes for different standard test loads. Each) can also produce other poles with test loads through agreement between the supply and demand parties. If the products are produced in accordance with the approval of the superior competent product department, they shall be tested according to the requirements indicated in the drawings. 1
Test bending moment
12.4913.88
.50116.31
GB 396--94
25: 38 |29. 00 ↓ 36-25
22.14,24. 15
21- 9424. 38 | 1.50
4 75 : 1. 00
6. 016. 00
GB39694
Standard test bending moment
10m123:140
Table 2 Standard test bending moment of assembled rod
Standard test bending moment
Note: (I) When using cantilever test, the standard test moment is the bending moment at the support point section, ②350, 390, 430 and 420 are (6.00+6.00): the tip diameter of the upper rod section of the assembled rod, the values listed in the table refer to the standard test bending moment values of the lower section| |tt||@：Pole bearing capacity test moment Mu=(3:JMkPu.—The allowable value of the comprehensive test coefficient of bearing capacity is 2.0. (4) With the agreement between the supply and demand parties, the electric analysis of the bearing capacity test moment can also be produced. Products produced according to the drawings approved by the superior competent department shall be tested according to the requirements indicated in the drawings. 111
Push test bending moment
Diameter, mm
370:37
Standard test bending moment
GB 396-94
Standard test bending moment
tuntan
6101001120
5609100120150180200,603100120140160,180200
Standard test bending moment
200220
GB 396- -94
Table 3 Test bending moment of equal diameter rod
4. 5;6.0;9.0
Note: 1) Use the simple support test, the standard test moment is the maximum moment at the two loading points; (2) The electric bearing capacity test moment MMk, [9] - the allowable value of the comprehensive bearing capacity test coefficient is 2.0. With the agreement of the supplier and the supplier, other bearing capacity test moments can also be produced. () Products produced in accordance with the paper approved by the superior competent department shall be inspected according to the requirements specified in the drawings. 5 Technical requirements
5.1 Product dimensions
Should comply with the requirements of this standard or be manufactured according to the design drawings. 5.2 Raw materials
5.2.1. Cement
It is advisable to use Portland cement with a content of not less than 425, generally Portland cement, slag Portland cement, anti-sulfate Portland cement or rapid hardening Portland cement with a content of not less than 425, and its performance shall comply with the provisions of GR175, GB199.GB748 and GB1344 respectively. 5.2.2 Aggregate
Sand shall be medium sand, and aggregate shall be crushed stone or pebble. Its quality shall comply with the provisions of GB/T14684 and GB/T14G85 respectively. And in accordance with the provisions of (BJ204.
The drinking water used in the concrete shall comply with the provisions of JGJ63. 5.2.4 Admixtures
The performance of the admixtures in the concrete shall comply with the provisions of GB8076. Chloride admixtures are strictly prohibited. 5.2.5 Steel bars
It is advisable to use Grade I, Grade I, cold-drawn Grade I steel bars or cold-drawn low-carbon steel wires, and their performance shall comply with the provisions of GB700, GH701 and GBJ204 respectively.
5.3 Concrete
5.3.1 When the wall thickness of the pole is 30~～35mm, the design strength grade of the centrifugal concrete shall not be lower than Grade C50. When the wall thickness of the pole is greater than 35mm, the design strength grade of the centrifugal concrete shall not be lower than Grade C40. When demoulding, the concrete strength grade shall not be lower than 50% of the design strength grade. When demoulding, the concrete strength grade shall not be lower than 80% of the designed concrete strength grade. 5.4 Construction requirements
5.4.1 Protective layer thickness: When the diameter of the main reinforcement is 6mm or less than 6mm, the protective layer thickness shall not be less than 12mm. When the diameter is above mm, the protective thickness shall not be less than i5mm. The end of the steel plate joint must have a concrete protective layer. 5.4.2 The processing of steel bars shall comply with the requirements of Appendix A (Supplement) of this standard. 5.5 Pole joints, embedded parts and reserved holes
5.5.1 When the pole is manufactured in sections, the joint can be made of steel plate rings, flanges or other joints. 5.5.2 The connection between the main reinforcement and the connecting parts shall be welded. The welding quality shall comply with the provisions of GBJ204 5.5.3 The strength of the support joint shall not be less than 95% of the cross-section bearing capacity at the joint. 5.5.4 Pre-prepared parts, reserved holes and drainage holes shall be set according to the design drawings and cleaned. ii
GB 396—94Www.bzxZ.net
5.5.5 The exposed metal parts of grounding nut, foot nail nut, junction box, etc. shall be clearly marked and cleaned. 5.6 Other requirements
5.6.1 The top of the product shall be sealed with concrete or mortar + if there are special requirements, it shall be handled separately. 5.7 Appearance quality
Should meet the requirements of Table 4 Regulations.
Table 4 Appearance Quality Requirements
Surface Cracks\
Edge Form Joint
Steel Plate Surface (or Method
Avoid and Slim Body
Joint Surface
Storage End and Root End Jumping Injury
Or Leakage
Inner and Outer Clothes Rain Chains, etc.
Inner Surface Cavity Embedding
Narrow Surface, Sticky Skin"
Superior Products
Weaving Transverse No Allowance
Depth Not More Than 3mm
Each Length Not More Than 100nt;
Cumulative Length Not More Than 5% of the Rod Length:
No Overlap
Depth Not More Than 3mml
Circumferential Length Not More Than 1/6 Perimeter;
Longitudinal length is not more than mm
Ring length is not more than 1/6 of the distance
Longitudinal length is not more than 20mm
Not allowed
Not allowed
Not allowed
Total area is not more than 1%
The average depth of the hole and the concrete arch root is not more than 5pm. The distance between the steel ring and the weld is less than 10
First-class product| |tt||Not allowed in both vertical and horizontal directions
The depth shall not exceed!;
The length of each place shall not exceed 201)mm
The total length shall not exceed 8% of the rod length:
No potential connection
The depth shall not exceed m
The circumferential length shall not exceed 175 circumference;
Transverse length shall not exceed 30
The circumferential length shall not exceed 1/5 of the length,
Transverse length shall not exceed 30 mm
Not allowed
Not allowed
Not allowed
The total area shall not exceed 3%
The depth shall not exceed & mm
The distance from the person shall be greater than 10 mm
Note: 1) Cracks and water effects are not counted in surface cracks, 2) The total area and external coefficient of pitting viscosity are the ratio of the total area of pitting and viscosity to the surface area of 1 m length. 5.8 The allowable deviation of the dimensions of each part shall comply with the provisions of Table 5. The allowable deviation of the dimensions of each part shall comply with the provisions of Table 5. The longitudinal crack is not allowed, the width of the circumferential seam is not allowed, the depth is not greater than the thickness of the protective layer; the length of each part is not greater than 300mm, the cumulative length is not greater than 10% of the rod length; the wax joint length is not less than 100mm, the depth is not greater than the thickness of the protective layer, the length of the bad interval is not greater than 1/4 of the circumference, the longitudinal length is not greater than 50 muon, the circumferential length is not greater than 1/4 of the circumference!
Floating length is not more than s0mm
Not allowed
Not allowed
Not allowed
Total area is T5%
Depth is not more than 10 m
Distance is greater than 10 m
Product grade
Superior product
Whole silver rod
Assembled extension rod section"
First-class product
Qualified product
End fabric
Protection will change
CB 396 -94
Line table 5
Superior product
Rod diameter less than or equal to 191
Pin diameter or self-winding 190
Steel plate type
Flange
Vertical error of center (section type)
Distance between two longitudinal holes
Retained hole
Embedded parts
Core surface||t t||Simple direction
Business color error
Diameter 430
Outer diameter
Inner and outer diameter
Center
Plate thickness
Deviation between the transmission line of the plate and the axis of the cup section D/1G
Product level
First-class product
Qualified product
Not more than
1 Not less than 1, CCO
is not greater than
. 1) If the relevant unit agrees, the pole length deviation is the difference between the manufacturing length and the design length when the pole is produced according to the design length. 2》 The protection length is the difference between the design length and the section length. In the bearing capacity test, the moment test is carried out, and the diameter of the pole is the reason for the pipe.
5.9 Mechanical properties include cracks, crack width, sudden force tensile test, bending moment and burning test , the standard test bending moment listed in Table 2 and Table 3 or the design drawings shall be used as the inspection basis, and shall meet the following requirements: 5.9.1 When the load is applied to the standard test bending moment, the crack width shall not exceed 0.2mm+. The top deflection of tapered rods with different rod lengths shall meet the requirements of Table 6; the deflection and crack width of equal-diameter rods and tapered rods with special requirements for deflection and crack width shall be specified by the supply and demand double force agreement. The table shows the allowable value of the top potential of the rod amm
(.. -L./33
+L?/35
(L.+L./35
(L.+.,/82
(L++1/32
(, +7>/25
GB 396--94
59.? If the standard test moment is unloaded, the newly added residual number of seams shall not exceed 0.05mm. 5. 9. 3
When the load is applied to the bearing capacity to test the bending moment, none of the following situations shall occur. a.
The crack width in the tensile zone reaches 1.5mm, or the tensile steel bar is broken; the concrete in the compressive zone is damaged
. When the equal-diameter bar is tested in the simple support mode, the diameter is 300mm, and the deflection is large: when the conical bar is tested in the cantilever mode, the deflection is greater than 10
; the true diameter is greater than or equal to 400mm, and the deflection is large
Note: The assembled fiber bar section with an expanded diameter of more than 31tn and a length of less than 8: no deflection test is performed. 6. Test method
The centrifugal concrete strength
is determined by using centrifugal ring specimens with the same materials, mix ratio, molding process and curing conditions as the product concrete. The test method is shown in Appendix B (Supplement).
6.2 External dimensions and dimensions
6.2.1. Technical requirements for measuring the base with external gauges. Table 7 Technical requirements for testing tools
Testing items
Protective layer thickness
Double width
Flange thickness
Most famous
Steel ruler
Steel ruler
Wire steel ruler
Angle ruler
Steel ruler
Depth full mark card||tt ||Deep variable vernier caliper
20 times reading microscope
Vernier caliper
Appearance and scale inspection methods are shown in Table 8.
Grain surface cracks
Joint end mortar
Bump or surge (check tip and root end)
"Flash, external surface de-reinforcement
Inner surface concrete solution
Pockmarked surface, sticky skin
150 mm
d~5lmm
0~150 mm
6--200
0--200mm
0150,0~300
Appearance and ruler measurement
Technical requirements for testing instruments
Accuracy or indicated error
Grade I ±5. C mm
Grade 1 ±1.2mm
Grade 1 ±1. 2 mm
±:0.6 nm
±0. 02 tmm
Observe, use 20 times reading microscope to measure the plate
Observe, use 2 Long steel ruler measurement
Observation, use 2m long steel ruler (or steel ruler) to measure the gauge, use 2m long material tape measure (or ruler), use 2m long steel tape measure (or steel ruler> to measure the observation
Division value
Observation, use 2m long steel tape measure (or 150mm long steel ruler) to measure?
Reserved hole damage
Steel plate welding mouth separation
Protective layer thickness
Curvature
End section
Reserved hole
Pin vibration diagram inner diameter
Flange
Steel pull diagram and flange axis and pole segment axis deviationTest method for mechanical properties of electric poles
GB 396- 94
Continued Table 8
Observation, depth measured with depth vernier caliper
Observation, distance measured with 150mm ruler
Length measured with 20 5 long steel ruler
Thickness measured with 2 m long steel ruler (or 150 nm long ruler) and 2 m long steel tape measure
Thickness measured with depth vernier caliper
Measured with wire and 150m long steel ruler
Measured with 90° angle ruler and 150mm long steel ruler and 2m long steel ruler (or 150mm long steel ruler) and 2 m long steel tape measure is changed to
and measured with a shadow vernier caliper
and measured with a hanging and a 150mm long steel ruler
The chain rod adopts the cantilever test method, and the equal diameter F adopts the simple support test method. The test equipment and procedures are shown in Appendix C (Supplement). After the bearing capacity verification bending moment test, the protective layer thickness is measured according to the following positions. The conical rod measures three points: the first point is at the B support, the second point is 0.6m from the end; the third point is any equal diameter rod between the first two points. Measure at the middle and both end supports. 7 Inspection rules
7.1 Factory inspection
7.1.1 Inspection items
Including appearance quality, dimensional deviation, crack resistance test, crack width test and standard test deflection under bending moment and concrete strength test, etc.
Electric poles of the same model, material, technology and tip diameter (or diameter) are grouped into 1000 poles. However, if the total number of poles produced within two months is less than 1000 poles but not less than 30 poles, they can also be grouped as one inspection batch. 7.1.3 Sampling
7.1.3.1 Appearance quality and dimensional deviation
Ten poles are randomly selected from each batch for appearance quality and dimensional deviation inspection. 7.1.3.2 Mechanical properties
From the qualified products of appearance quality and dimensional deviation inspection, one pole is randomly selected for crack resistance test, crack width test and standard test deflection under bending moment test.
7. 1. 4 Judgment
7.1.4.1 Appearance quality and dimensional deviation
Among the 10 inspected poles, if no more than 2 poles do not meet a certain grade, the appearance quality and dimensional deviation of the batch of products shall be judged to be of the corresponding grade.
7.1.4.2 Mechanical properties
If the crack resistance, crack width test and standard test deflection under bending moment meet the requirements of Article 5.9 of this standard, it shall be judged as qualified. If any one of them does not meet the requirements of Article 1.341 Appearance quality and dimensional deviation
Among the 10 inspected poles, if no more than 2 poles do not meet a certain grade, the appearance quality and dimensional deviation of the batch of products are judged to be of the corresponding grade.
7.1.4.2 Mechanical properties
When the crack resistance, crack width test and standard test deflection under bending moment meet the requirements of Article 5.9 of this standard, it is judged to be qualified. If one of them does not meet the requirements of Article 1.341 Appearance quality and dimensional deviation
Among the 10 inspected poles, if no more than 2 poles do not meet a certain grade, the appearance quality and dimensional deviation of the batch of products are judged to be of the corresponding grade.
7.1.4.2 Mechanical properties
If the crack resistance, crack width test and standard test deflection under bending moment meet the requirements of Article 5.9 of this standard, it is judged to be qualified. If one of them does not meet the requirements of Article 1.34
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