DL/T 5083: Evolution and historical versions
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(Prestressed anchoring construction specification for hydropower and water conservancy projects)
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Specification of prestressing tendon construction for hydropower and water resources project
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Specification of prestressing tendon construction for hydropower and water conservancy project
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Construction guide for prestressed tendon of hydraulic tunnel with concrete lining
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DL/T 5083-1998
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PDF similar to DL/T 5083-2019
Standard similar to DL/T 5083-2019 GB 50009 JGJ 7 Basic data | Standard ID | DL/T 5083-2019 (DL/T5083-2019) | | Description (Translated English) | (Prestressed anchoring construction specification for hydropower and water conservancy projects) | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | P21 | | Word Count Estimation | 114,175 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2019-10-01 | | Older Standard (superseded by this standard) | DL/T 5083-2010 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 | | Issuing agency(ies) | National Energy Administration | DL/T 5083-2019: (Prestressed anchoring construction specification for hydropower and water conservancy projects)
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Specification of prestressing anchorage construction for hydropower and water resources project
ICS 27.140
P 59
Record number. 60035-2017
People's Republic of China Electric Power Industry Standard
P DL/T 5083-2019
Replace DL/T 5083-2010
Construction code for prestressed anchorage of hydropower and water conservancy projects
2019-6-4 release
2019-10-01 implementation
Issued by National Energy Administration
Energy Industry Standards of the People's Republic of China
Construction code for prestressed anchorage of hydropower and water conservancy projects
Editor-in-chief. China Electricity Council
Approval department. National Energy Administration
Effective date. October 2nd,.2009
China Electric Power Press
2019 Beijing
National Energy Board
announcement
Foreword
According to the "Notice of the National Energy Administration on Issuing the.2016 Energy Sector Standard System (Revision) Plan" (Guoneng Technology [2016]
No. 238) requirements were formulated.
During the preparation of this specification, in-depth investigations and studies were conducted, engineering practical experience was carefully summarized, and opinions from relevant parties were widely solicited.
The main content includes materials and equipment, construction, testing and monitoring, safety and environmental protection, quality inspection and acceptance.
The main technical content of this specification revision is.
--In order to make the code cover more comprehensive and the name more accurate, the code name was changed to "Code for Construction of Prestressed Anchorage of Hydropower and Water Conservancy Projects";
-Deleted the "Scope" chapter and some clauses in the "General Provisions" in the original specification;
- Added the term explanation of "prestressed anchor rod and anchor pier", revised the term explanation of "prestressed anchor cable", and deleted "prestressed steel
The term "stranded wire, coating, repair material, casing, external anchor head" is explained, and the order of the term explanation is adjusted according to the logical relationship and importance;
-Added the "Basic Provisions" chapter, and Chapters 5 and 6 added the "General Provisions" chapter;
--Increase the content related to prestressed materials such as prestressed threaded steel bars and self-drilling prestressed anchor rods;
--Added content related to the requirements for the use of fixtures and connectors;
-Added the chapter of grouting materials;
--- Increased the requirements for the production and installation of tension-dispersed pre-stressed anchor cables and tension-compression composite pre-stressed anchor cables;
--The "Instrument Buried" related content has been added to the test and monitoring chapter;
--Adjust the original three chapters of "Quality and Safety", "Environmental Protection" and "Acceptance" to "Safety and Environmental Protection" and "Quality Inspection"
"Inspection and acceptance" two chapters;
--Delete the inspection items listed in the original "Quality Inspection and Acceptance" chapter, and add Appendix F as the "Quality Inspection and Acceptance" Chapter Quality Inspection
Check items;
--Appendix E adds "Measurement method of shrinkage".
After the implementation of this specification, it will replace DL/T 5083-2010.
This specification was proposed by the China Electricity Council.
This specification is under the jurisdiction of the Hydropower Construction Standardization Technical Committee of the Electric Power Industry.
Editor-in-chief of this code. China Gezhouba Group Second Engineering Co., Ltd.
China Gezhouba Group Co., Ltd.
Participating unit of this specification. China Water Resources and Hydropower Third Engineering Bureau Co., Ltd.
Sichuan Zhunda Geotechnical Engineering Co., Ltd.
Liuzhou Ouweimu Machinery Co., Ltd.
The main drafters of this specification. Li Junlin, Benhua, Ge Wenwu, Yang Junzhi, Yan Ping, Jin Zhibin, Liao Yong
Huang Fangwei Wu Qinfeng Feng Yangwen Cao Lin Yu Chao Cao Jiao Deng Debin
Ren Ruicheng Zhou Dandan Liu Taohong Zhang Xiaojun Liu Shuikang Li Jiantao Luo Sisong
Zhang Renyi Dong Zhongxiu Xu Li Zhang Chen Liu Xin
Main reviewers of this specification. Sun Laicheng, Wang Yi, Mei Jinyu, Zhou Hougui, Chu Yuexian, Liu Dongni, Cheng Zhihua
Guo Guangwen Tan Kaiyan Wang Pengyu Xi Hao Wu Gaojian Yang Chengwen Xiangjian
Tu Huaijian Yang Heming Shen Yiyuan Yang Tao and Sun Wen He Xiaoxiong Wu Xiurong
Yang Qingzhu star Jia Zhiying Tan Chunan
Table of contents
1 General. 1
2 Terminology. 2
3 Basic regulations...4
4 Materials and equipment...5
4.1 General regulations...5
4.2 Anchor Cable and Anchor Rod Material...5
4.3 Anchor clamps and connectors...6
4.4 Protective materials...6
4.5 Grouting materials...7
4.6 Hole making, stretching and grouting equipment...7
5 Construction. 9
5.1 General regulations...9
5.2 Hole formation...9
5.3 Production...10
5.4 Installation...12
5.5 Grouting...14
5.6 Anchor Pier...15
5.7 Tension...16
5.8 Protection...18
6 Testing and monitoring...19
6.1 Test...19
6.2 Instrument burying and monitoring...19
7 Safety and Environmental Protection...21
7.1 Safety...21
7.2 Environmental protection...21
8 Quality Inspection and Acceptance...22
8.1 Quality check...22
8.2 Acceptance...22
Appendix A Mechanical Performance Test of Steel Strand...23
Appendix B Static load test of prestressed steel strand-anchor assembly...24
Appendix C Anchorage hardness inspection...26
Appendix D Calibration of Tensioning Tools...27
Appendix E Calculation of elongation value of prestressed anchor cable and measurement method of shrinkage...28
Appendix F Prestressed Anchor Cable Construction Record and Process Quality Evaluation Form 30
Explanation of terms used in this specification 37
List of Reference Standards 38
Attachment. Article description...39
1 General
1.0.1 This code is formulated in order to standardize the construction of prestressed anchorage of hydropower and water conservancy projects and meet the requirements of engineering safety, quality and economy.
1.0.2 This code applies to hydropower and water conservancy projects.
1.0.3 The prestressed anchoring construction of hydropower and water conservancy projects shall not only comply with this code, but shall also comply with the provisions of relevant national standards.
2 term
2.0.1 pretressed anchorage
By applying tension to the prestressed anchor cable (rod), the rock-soil or concrete structure can reach a stable state or improve its internal stress condition
Technical measures.
2.0.2 pretressed anchors
A tension member (system) that transmits the tension force to a stable and suitable rock-soil or concrete structure.
2.0.3 prestressing tendon
The body of the tension rod is a prestressed member composed of several steel wires or steel strands arranged in bundles according to a certain rule.
2.0.4 bonded prestressing anchors
The prestressed steel strand is in direct contact with the grout, the anchor cable is tensioned and locked, and the tension section after grouting has no relative sliding with the anchored solid.
Cable.
2.0.5 unbonded prestressing anchors
The prestressed steel strand is woven into an anchor cable after being coated with a special anti-corrosion oil and an outer coating. After being tensioned and locked, its tension section is in the anchored solid
Prestressed anchor cable that can slide relatively.
2.0.6 Delay bonded prestressing anchors
After the pre-stressed steel strand is treated with the adhesive, it initially has the function of an unbonded anchor cable. When the adhesive is cured, it becomes a bonded anchor cable.
2.0.7 prestressing anchorage anchors on the tension type
The steel strands of the anchoring section in the anchor cable body are bonded with the cementing material. After the prestress is applied, the slurry stones in the anchoring section are in tension and the stress is concentrated
A pre-stressed anchor cable that decays rapidly at the junction of the anchor section and the tension section and toward the bottom of the hole.
2.0.8 prestressing anchorage anchors on the tension dispersion type
In the inner anchoring section of the anchor cable body, a plurality of steel strand groups are scattered and bonded to the cement body, so that the prestress is distributed and transmitted to the ground along the inner anchoring section.
And the pre-stressed anchor cable with the cemented body of the inner anchor section in tension.
2.0.9 Prestressing anchorage anchors on the compression type
A bearing body is set at the end of the anchoring section in the anchor cable body. After prestress is applied, the slurry stone in front of the bearing body is in a compressed state.
Cable.
2.0.10 prestressing anchorage anchors on the compression-dispersion
type
Multiple bearing bodies are scattered in the anchoring section of the anchor cable, so that the prestress is dispersed and transmitted to the formation along the inner anchoring section and the slurry in front of each bearing body is combined.
A prestressed anchor cable where the stone is under compression.
2.0.11 Free-style single-hole multi-anchor head anticorrosive prestressed anchorage cable unbonded prestressing anchorage tendon on the
multi-anchor and anticorrosion type
Multiple groups of bearing bodies are scattered in the inner anchoring section of the anchor cable body. Each bearing body is composed of a bearing plate and auxiliary parts. The P-type of each steel strand
The anti-corrosion single anchor head formed by encapsulating and protecting the squeeze anchoring end is embedded between the two, and the bearing bodies of each group are connected as a whole.
After the prestress, the prestress is dispersed and transmitted to the stratum along the inner anchoring section and the cemented body in front of each bearing body is in a prestressed anchor cable in a compressed state.
2.0.12 Prestressing anchorage anchors on the tension-compression
composite type
A plurality of bearing bodies are scattered in the inner anchoring section of the anchor cable body, and the steel strands on each bearing body are roughly equally divided into bonded steel strands and
Unbonded steel strands, or single steel strands are unbonded steel strands at the front of the carrier and bonded steel strands at the back. After prestressing,
The cement body around each bearing body is in a prestressed anchor cable in a combined state of tension and compression.
2.0.13 Anchorage
The anchoring device used to maintain the tension of the prestressed steel strand (or prestressed rebar) and transfer it to the anchored solid.
2.0.14 prestressing tendon anchorage assembly
The force-bearing unit for the assembly of prestressed steel strands and anchors.
2.0.15 inner anchoring section
The inner end of the prestressed anchor cable (rod) body. Use cementing materials or metal processing mechanical devices to make the inner end of the anchor cable (rod) and the anchored
The body is bonded as a whole section.
2.0.16 Tensile section
The pre-stressed anchor cable (rod) relies on its own elastic deformation, can be freely extended when tensioned, and forms the part that prestresses the anchored solid after being locked.
2.0.17 anchor pier
A support device for tensioning and locking prestressed anchor cables (rods).
2.0.18 design tension
In accordance with the requirements of the anchoring design and reserve a certain safety factor and the loss of prestress caused by various factors, determine the stress of each anchor cable (rod)
Tension load applied.
2.0.19 extra design tension
In order to eliminate the loss of prestress caused by various factors, when the anchor cable (rod) is tensioned, after the designed tension is increased by a certain percentage, the actual tension applied
Pull load.
2.0.20 drawn-in
During the anchoring process, due to the relative displacement and deformation between the anchor and the prestressed steel strand, the shrinkage value of the prestressed steel strand produced.
2.0.21 effective prestressing
After the pre-stressed anchor cable (rod) is tensioned and locked, the pre-stress is gradually reduced due to various factors, and the pre-stress provided after it is reduced to a relatively stable
value.
2.0.22 prestressing loss
The prestressed anchor cable (rod) is tensioned and locked and the stress is reduced in the process from the establishment of effective prestress.
3 Basic regulations
3.0.1 Before construction of prestressed anchorage of hydropower and water conservancy projects, it is necessary to understand the environment of the anchoring project and the engineering characteristics of the anchored rock, soil or components, and obtain
Design drawings, technical documents and construction conditions related to the anchored rock-soil or concrete structure.
3.0.2 The prestressed anchoring construction of hydropower and water conservancy projects shall prepare construction organization design, and formulate construction process rules according to different anchoring types.
Technical clarification should be carried out before construction.
3.0.3 In the construction of the prestressed anchorage project at the same position, it is advisable to adopt the prestressed materials of the same type, model, specification and the same production process.
Power materials, anchors.
3.0.4 The materials used in the prestressed anchorage project shall have corresponding qualification certificates, and shall be tested before construction.
3.0.5 Prestressed anchoring construction measuring equipment and instruments must be calibrated regularly according to the specifications.
3.0.6 Before the construction of the prestressed anchorage project, the operator should undergo technical training.
3.0.7 The strength of anchor pier concrete, steel anchor pier leveling layer mortar or concrete, structural concrete and internal anchor section cement
Tension can only be carried out when the design requirements are met.
3.0.8 If an abnormal situation is encountered during the stretching process, the machine should be shut down for inspection and treatment.
3.0.9 Test and construction records should be summarized and filed in time.
4 Materials and equipment
4.1 General rules
4.1.1 Prestressed anchor cables, anchor rod materials and anchor clamps, connectors, cement, steel bars and other construction main materials shall be checked and accepted according to the corresponding material standards
And testing, and should have material certificate, product certificate, test and inspection report.
4.1.2 The materials and equipment used in the prestressed anchoring project shall have protective measures during lifting, transportation, storage and installation to avoid corrosion,
Contamination, mechanical damage, confusion and loss.
4.1.3 The pre-stressed anchor cables, anchor rod materials, anchor clamps, and connectors that have passed the inspection shall be externally stored for more than 1 year.
View inspection.
4.1.4 The prestressed anchor cable can be selected according to the nature, scale, and anchorage of the project, high-strength low-relaxation pre-stressed steel wire, steel strand or no
Bonded prestressed steel strands.
4.2 Anchor cable and bolt material
4.2.1 When prestressed steel wires or prestressed steel strands are used as anchor cable materials, their mechanical properties shall be in accordance with the "Steel Hinge for Prestressed Concrete
Line" GB/T 5224 and "Wire for Prestressed Concrete" GB/T 5223; when high-strength prestressed threaded steel bar is used as anchor material,
Its mechanical properties should meet the requirements of "Rebar for Prestressed Concrete" GB/T.20065.
4.2.2 Prestressed steel strands include uncoated and coated high-strength and low-relaxation steel strands. Standard or die-drawn steel strands of 1860MPa and 1960MPa can be used.
Stranded wire.
4.2.3 The material of the anchor ropes and bolts entering the site shall be visually inspected and the inspection results recorded. The visual inspection shall meet the following requirements.
1 The outer packaging of the steel strand should be complete, and the surface should be free of oil stains, rust, burrs and damage; the steel strand has good straightening performance and no loose ends;
The protective layer of the steel strand is not damaged.
2 The sheath of unbonded steel strands must not be produced from recycled materials; the surface of the sheath should be smooth, free of wrinkles, cracks, oil leaks and unplasticized particles,
If the above-mentioned defects are found, it should be handled as qualified.
3 Each reel (bundle) of steel strands should have a material certificate, product certificate, and test inspection report. Unbonded prestressed steel strands should also be provided
The material certificate of the high-density polyethylene resin and the special anticorrosive grease for prestressed steel strands.
4 The surface quality of the threaded steel bars for prestressed concrete shall be inspected and accepted.
5 The surface of prestressed concrete threaded steel bars, self-advancing prestressed anchor rods and connecting sleeves shall not have defects that affect their mechanical properties.
6 The material of the anchor cable and anchor rod material entering the site shall be provided with the material certificate, product certificate, and test inspection report according to the inspection batch.
4.2.4 The mechanical performance test of steel strands shall meet the following requirements.
1 The inspection items should include tensile strength, yield strength, elongation, relaxation properties, elastic modulus, etc.
2 The inspection of relaxation performance and elastic modulus should be carried out by the manufacturer, and the inspection results are provided with the goods.
3 The other inspection items should be inspected by the construction unit according to Appendix A.
4 The inspection frequency is the same variety, the same model, and the same manufacturer. Every 60t is a batch, and less than 60t is also a batch. Each batch
The number of sub-samples shall not be less than 3 groups.
4.2.5 Unbonded steel strands should meet the standard requirements of JG/T 161 "Unbonded prestressed steel strands", and slow-bonded steel strands should be marked with the adhesive
Period.
4.2.6 The mechanical performance test of rebar shall meet the following requirements.
1 The test items should include yield strength, ultimate tensile strength, elastic modulus, elongation, cold bending test, and connection strength with the connecting sleeve.
Degree etc.
2 The inspection frequency is the same variety, the same model, and the same manufacturer. Every 60t is a batch, and less than 60t is also a batch. Each batch
The number of sub-samples shall not be less than 3 groups.
4.2.7 The self-drilling prestressed anchor rod body shall be made of cold drawn seamless steel pipes, the tensile strength shall meet the design requirements, and the cold extrusion process shall be adopted
Machining threads.
4.3 Anchor clamps, connectors
4.3.1 The mechanical properties and geometric dimensions of anchors, fixtures, and connectors should meet the design requirements. Products are required for anchorages, fixtures, and connectors.
The quality of the certificate and test inspection report shall comply with the relevant provisions of "Anchors, Fixtures and Connectors for Prestressed Tendons" GB/T 14370.
4.3.2 After the anchors, fixtures, and connectors pass the inspection and acceptance, they should be visually inspected before use.
4.3.3 The anchors, fixtures and connectors that enter the warehouse shall be inspected according to the following regulations.
1 Appearance inspection shall randomly select 10% from each batch of anchors, fixtures and connectors, and shall not be less than 10 sets. If there are less than 10 sets, all shall be inspected.
Check the appearance and structure of the anchor, and the matching size and surface inspection of the anchor and the tensioning machine. Only qualified ones can be put into use.
2 The hardness test shall randomly select 5% from the total amount of anchors, clamps, and connectors, and the anchor plates shall not be less than 5 pieces, and the clips shall not be less than 5 pairs.
Test according to the hardness range provided by the manufacturer, and only those who pass the test can be put into use. See Appendix C for the anchor hardness test requirements.
4.3.4 According to the needs of the project, the anchors used in large-scale prestressed anchoring projects shall be subjected to static load test of the prestressed steel strand-anchor assembly according to Appendix B
The anchoring performance should meet the following requirements. the anchorage efficiency coefficient μa is not less than 0.95, the total strain εapu when the measured ultimate tension is not less than 2.0%, and the anchor
The fixture components must not be cracked or broken visible to the naked eye.
4.3.5 In addition to the static load anchoring performance of the anchor fixture, the supplier shall provide the equipment that has passed 2 million fatigue performance tests and 50 cyclic load tests.
'S recent information.
4.3.6 The clamps should have good self-anchoring performance, loose anchor performance and safe repeated use performance, and the main anchoring parts should have good rust resistance
Performance, the number of reusable times should not be less than 300 times.
4.3.7 Permanent prestressed anchor cable (rod) connectors used in concrete structures or components shall meet the performance requirements of anchors; used for pretensioning
Connectors that need to be released and disassembled after construction and tension should meet the performance requirements of the fixture.
4.3.8 The material and processing dimensions of anchor pads and spiral ribs matching the anchors shall meet the design requirements, and the anchor pads shall have sufficient rigidity
And strength, the inner mouth of the horn should have a smooth transition and no burrs.
4.3.9 The connector should be tested for tensile force together with the anchor cable and the material of the anchor rod. There should be no less than 3 samples of the same batch of products.
The tensile force is qualified.
4.4 Protective materials
4.4.1 The specifications and quality of the casing used for borehole formation by buried pipe shall meet the design requirements.
4.4.2 Metal pipes should be used for the perforation of prestressed anchor cables (rods) of piers of isolated working gates; annular prestressed anchor cables or prestressed cables for hydraulic tunnels
High-density polyethylene corrugated pipes or metal spiral pipes should be used for concrete linings, aqueducts, bridges, pipe culverts and other cable passages.
4.4.3 The quality of the embedded bore casing shall meet the design requirements, and its geometric dimensions shall meet the following requirements.
1 The inner diameter of the casing should be 4mm and above the diameter of the anchor cable (rod) body.
2 When the casing is made of steel pipe, the wall thickness of the steel pipe should not be less than 3mm.
3 When the casing is made of a metal spiral tube, the wall thickness of the spiral tube should not be less than 0.3mm, and its radial deformation should not be greater than 15% of the inner diameter.
4 The casing adopts high-density polyethylene (HDPE) bellows whose wall thickness should not be less than 3mm, and the material should not be made of recycled materials.
4.4.4 Rock anchor high-density polyethylene corrugated pipe protective casing shall have chemical stability and durability, and shall be able to withstand external impact and friction during construction
damage.
4.4.5 For anchor cables (rods) that use anti-corrosion coatings for anti-corrosion, the chemical properties of the anti-corrosion coatings should comply with "Anti-corrosion coatings for steel structures in construction" JG/T 224
Relevant regulations.
4.4.6 The anticorrosive grease used for unbonded prestressed tendons shall comply with the relevant regulations of JG/T 430 in "Anticorrosive Grease for Unbonded Prestressed Tendons".
4.5 Grouting material
4.5.1 The cement used for grouting materials shall meet the following requirements.
1 Portland cement or ordinary Portland cement should be used for grouting, and its quality should meet the requirements of "General Portland Cement" GB 175.
The strength rating should not be lower than 42.5.
2 When the groundwater is corrosive, special cement should be used. When the design has special requirements, it shall be implemented according to its requirements.
4.5.2 The water used in the grouting material shall meet the requirements of ...
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