CECS: 117-2000 Design specification for expansion joints of concrete structures for water supply and drainage projects CECS117:2000 CECS:117-2000 Standard download decompression password: www.bzxz.net

CECS 117:2000
Standard of China Association for Engineering Construction Standardization
Specification for the deformation joint design ofconcrete structures in water work engineering2000
Standard of China Association for Engineering Construction Standardization
Specification for the deformation joint design ofconcrete structures in water work engineeringCECS117:2000
Editor: Beijing Municipal Engineering Design and Research InstituteApproval: China Association for Engineering Construction StandardizationEffective date: December 1, 2000
2000 Beijing
This standard is formulated in accordance with the requirements of the Notice on Issuing Recommended Engineering Construction Standards and Specifications Plan (91) No. 11 of China Association for Engineering Construction Standardization. This code is compiled after extensive investigation and research, and after analysis and research with reference to relevant domestic and foreign materials.
The association standard "Design Code for Deformation Joints of Concrete Structures in Water Supply and Drainage Engineering" is now approved, numbered CECS117:2000, and recommended to engineering construction design, construction, and user units for adoption. This code is managed by the Tibetan Structure Committee of the China Engineering Construction Standardization Association, and is interpreted by the Beijing Municipal Engineering Design and Research Institute (No. 2, Yuetan South Street, Beijing, Postal Code: 100045). If you find any need for modification and supplementation during use, please send your opinions and information directly to the interpretation unit. Editing unit: Beijing Municipal Engineering Design and Research Institute Co-editing unit: Shanghai Municipal Engineering Design Institute China Municipal Engineering Central South Design Institute, Main drafters: Wang Jingshan, Sheng Jie, Shu Yali China Association for Engineering Construction Standardization
September 20, 2000
Basic provisions
General provisions for the setting of expansion joints...
Width of expansion joints
Composition and material requirements of expansion joints·.
Waterstop
Material and physical and mechanical properties of waterstopTypes of rubber waterstop·
Selection principles
Filling plate·
Joint sealing material
Structure of deformation joint
Concrete section at deformation joint
Waterstop, caulking plate and joint sealing material
Construction requirements,
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H
Appendix I
Waterstop
000000000||t t||Jointing plates and caulking sealants
Physical and mechanical properties of rubber waterstop
Physical and mechanical properties of plastic waterstop
Physical and mechanical properties of polyethylene foam plastic boardPhysical and mechanical properties of polysulfide sealant
Physical and mechanical properties of polyurethane sealant
Specifications of CB type rubber waterstop
Specifications of CP type rubber waterstop
Specifications of EB type rubber waterstop
Specifications of EP type rubber waterstop
Terms used in this code
1.0.1 This code is formulated to ensure that the design of deformation joints of concrete structures in water supply and drainage projects is safe, applicable, economically reasonable, ensures quality, and improves investment benefits. 1.0.2 This code is applicable to the design of deformation joints (expansion joints, settlement joints and seismic joints) of concrete water storage tanks, pipes, pump houses, etc. in water supply and drainage projects in towns and industrial enterprises. 1.0.3 For concrete structures with special anti-corrosion requirements, relevant regulations shall be followed.
1.0.4 When designing deformation joints for concrete structures, in addition to complying with this code, the relevant national standards in force shall also be complied with. 2 Basic regulations
2.1 General regulations for the setting of deformation joints
Deformation joints shall be set in the following cases:
To adapt to the influence of temperature and humidity on the deformation of the structure, expansion joints shall be set.
2 To adapt to the influence of uneven settlement of different parts of the structure, settlement joints shall be set.
3 To adapt to the influence of earthquake on the deformation of the structure, seismic joints shall be set. 2.1.2
The setting of deformation joints shall comply with the following principles: 1
The structural system shall be reasonably laid out. The different parts separated by deformation joints shall be regular and symmetrical in shape, and the structural forces shall be clear. Convenient construction, 2 Under working conditions, the strength, water tightness, anti-corrosion, sanitation, temperature and durability of the expansion joints shall meet the design requirements.
3 A expansion joint shall be arranged in a vertical plane. 2.1.3 The spacing of expansion joints shall be based on the buried conditions, temperature difference, humidity difference, structural type, reinforcement ratio of structural members, concrete mix ratio and construction technology of the structure, and shall be implemented in accordance with the relevant national standards in force.
Adding appropriate admixtures to concrete and reasonably using concrete "post-casting belt (reinforcement belt)" and other practices can be used as measures to increase the spacing of expansion joints. 2.1.4
The setting of settlement joints and seismic joints shall comply with the following principles: 1
Set at the place where the structural form changes.
2Set at the place where the loads of adjacent parts of the structure are greatly different (such as different heights, different live loads, etc.).
3Set at the place where the foundations of adjacent parts of the structure are greatly different. 2
30mm.
30mm.
50mm.
Width of expansion joint
The width of expansion joint shall be determined according to the expansion and contraction of the structure, and can be 20~ The width of settlement joint is related to the settlement difference between structural units, and should not be less than the width of seismic joint. The width of expansion joint shall be determined according to the calculated structural deformation, and can be 30~ The width of expansion joint shall be determined according to the thickness of structural section. When the section thickness is not more than 300mm, the width of the joint shall not be less than 20mm; when the section thickness is more than 300mm, the width of the joint shall not be less than 30mm.
2.3 Composition and material requirements of expansion joint
The expansion joint can be composed of three parts: water stop, caulking plate and caulking sealant. 2.3.1
The placement of water stop can be divided into two types: embedded type (Figure 2.3.1-1) and external type (Figure 2.3.1-2). External waterstop is often used on the outside of the bottom plate or wall plate of a structure. 3
Water-facing surface
(a) Top plate, wall plate
Water-facing surface
Water-facing surface
(b) Top plate, wall plate
(c) Bottom plate
Water-facing surface
Figure 2.3.1-1
1-Buried waterstop
4-Water-expanding rubber
Water-facing surface
(d) Bottom plate
Deformation joint (buried waterstop)| |tt||2—Seam-filling platewwW.bzxz.Net
5—Cushion
Water-facing surface
3—Seam-filling sealant
Water-facing surface
Water-facing surface
Deformation joint (external waterstop)
Figure 2.3.1-2±
Water-facing surface
1—External waterstop 2—Seam-filling plate 3—Seam-filling sealant 4—Cushion Expansion joints can be set as initiation joints (contraction joints) according to the needs of design and construction. 2.3.2
The initiation joints of embedded waterstop are shown in Figure 2.3.2-1, and the initiation joints of external waterstop are shown in Figure 2.3.2-2.
When reliable technical measures can ensure the position of the initiation joints, continuous pouring can also be carried out. 2 Initiation joints are divided into complete contraction joints and incomplete contraction joints. For complete shrinkage joints, the longitudinal reinforcement in the member is not continuously arranged (all cut off): For incomplete shrinkage joints. The longitudinal reinforcement in the member is continuously or half-continuously arranged (not cut off or half cut off). Complete shrinkage joints cannot transmit bending moment and tension: Incomplete shrinkage joints can transmit bending moment and tension, but should be arranged on sections with smaller internal forces. (a) Complete shrinkage joint
Figure 2.3.2-1
1-Embedded waterstop
3-Longitudinal reinforcement
(b) Incomplete shrinkage joint
Initiation joint (embedded waterstop)
2-Joint sealing material
4-Concrete construction joint (initiation joint)
(a) Complete shrinkage joint
Figure 2.3.2—2
1-External waterstop
3-Longitudinal reinforcement
(b) Incomplete contraction joint
Initiation joint (external waterstop)
2-Joint sealant
4-Concrete construction joint (initiation joint)
When the waterstop is deformed, it should have the ability to anchor, stop water and adapt to the deformation in the concrete.
Joint filler should have the ability to adapt to the deformation of the expansion joint. Joint sealant is generally embedded in the water-facing surface, should have a water-stopping and sealing effect and be able to adapt to the deformation of the expansion joint. The bonding force between the joint sealant and the concrete surface shall not be less than 0.2MPa.
When necessary, the decorative requirements of the expansion joint surface should be considered. The decorative structure should have the ability to adapt to the deformation of the expansion joint.
3 Waterstop
3.1 Materials and physical and mechanical properties of waterstop3.1.1
Waterstops should be made of elastic materials. Elastic waterstops can be made of natural rubber, synthetic rubber, water-swelling rubber, plastic (PVC) or rubber-plastic materials. 3.1.2
The physical and mechanical properties of rubber waterstops shall comply with the provisions of Appendix A of this Regulation. 3.1.3
The physical and mechanical properties of plastic (PVC) waterstops shall comply with the provisions of Appendix B of this Regulation.
3.1.4 The sanitary indicators of waterstops used in structures for storing or transporting drinking water shall meet the following requirements:
1 Rubber waterstops shall comply with the requirements of GB4806.1 of the Hygienic Standard for Rubber Products for Food Use;
2 Plastic waterstops shall comply with the requirements of GB5749 of the Hygienic Standard for Drinking Water.
3.2 Types of rubber waterstops
3.2.1 The specifications and dimensions of the embedded rubber waterstop with holes in the middle (CB type) may be adopted in accordance with Appendix F of this Code.
3.2.2 The specifications and dimensions of the embedded rubber waterstop without holes in the middle (CP type) may be adopted in accordance with Appendix G of this Code.
3.2.3 The specifications and dimensions of the externally attached rubber waterstop with holes in the middle (EB type) may be adopted in accordance with Appendix H of this Code.
3.2.4 The specifications and dimensions of the externally attached rubber waterstop without holes in the middle (P type) may be adopted in accordance with Appendix I of this Code.
3.2.5 Various types of waterstops shall be equipped with accessories of corresponding forms, and their main types are shown in Figure 3.2.5.
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