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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces JT/T 327-2004 Highway bridge expansion and contraction installation. The following main technical changes have been made with respect to JT/T 327-2004:
——The range of expansion and contraction quantity is adjusted (see Clause 1);
——The term and definition of expansion and contraction body have been deleted (see 3.4 of 2004 edition), and the term and definition of elastic bearing element have been added (see 3.4);
——The classification of expansion and contraction installations is revised and the rubber expansion and contraction installation is deleted (see 4.1.3 of 2004 edition); special-shaped steel single-seam expansion and contraction installations is changed into single-seam modular expansion and contraction installations (see 4.2 of this standard; 4.1.4 of 2004 edition); seamless expansion and contraction installation is added [see 4.1c)]; the types of modular expansion and contraction installations and pectinate plate expansion and contraction installations are refined (see 4.2, 4.3 and 4.4).
——The expression methods of product code are improved, and the structure schematic of the expansion and contraction installation is supplemented (see 4.5);
——The general requirements of expansion and contraction installations are supplemented and improved; the deformation performance requirements are improved (see 5.1.1); the water resistance requirements (see 5.1.2), bearing performance requirements (see 5.2.1) and durability requirements (see 5.2.2) are supplemented;
——The test methods of expansion and contraction installations are supplemented and improved, with the deformation performance test (see 7.1.5), water resistance test (see 7.1.6) and bearing performance test (see 7.1.7) supplemented, and welding quality inspection (see 7.2.4) and coating quality inspection (see 7.2.5) improved.
This standard was proposed by and is under the jurisdiction of the National Technical Committee 223 on Traffic Engineering Facilities (Highway) of Standardization Administration of China (SAC/TC 223).
The previous editions of this standard are as follows: JT/T 327-1997 and JT/T 327-2004.
General technical requirements of expansion and contraction installation for highway bridge
1 Scope
This standard specifies the classification, general requirements, technical requirements, test methods and inspection rules of expansion and contraction installations for highway bridge.
This standard is applicable to the expansion and contraction installations used in highway bridge engineering with expansion and contraction quantity of 20 mm~3,000 mm.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 193 General purpose metric screw threads - General plan
GB/T 699 Quality carbon structure steels
GB/T 700 Carbon structural steels
GB/T 702 Hot-rolled steel bars - Dimensions, shape, weight and tolerances
GB/T 706 Hot rolled section steel
GB 912 Hot-rolled sheets and strips of carbon structural steels and high strength low alloy structural steels
CB/T 985.1 Recommended joint preparation for gas welding, manual metal arc welding, gas-shield arc welding and beam welding
GB/T 1184 Geometrical tolerancing - Geometrical tolerance for features without individual tolerance indications
GB/T 1228 High strength bolts with large hexagon head for steel structures
GB/T 1231 Specifications of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures
GB 1499.1 Steel for the reinforcement of concrete - Part 1: Hot rolled plain bars
GB 1499.2 Steel for the reinforcement of concrete - Part 2: Hot rolled ribbed bars
GB/T 1591 High strength low alloy structural steels
GB/T 1690 Rubber, vulcanized or thermoplastic - Determination of the effect of liquids
GB/T 1804 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 3274 Hot-rolled plates and strips of carbon structural steels and high strength low alloy structural steels
GB/T 3280 Cold rolled stainless steel plate, sheet and strip
GB/T 3323 Radiographic examination of fusion welded joints in metallic materials
GB/T 3672.1 Rubber - Tolerances of products - Part 1: Dimensional tolerances
GB/T 4171 Atmospheric corrosion resisting structural steel
GB/T 11345 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment
JB/T 5943 Construction machinery - General specifications for welding parts
JT/T 4 Plate type elastomeric pad bearings for highway bridges
JT/T 722 Specifications of protective coating for highway bridge steel structure
JT/T 1039 Polyurethane plug expansion and contraction installation for highway bridges
JTG D60 General code for design of highway bridges and culverts
JTG D64 Specifications for design of highway steel bridge
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
expansion and contraction joint
gap set in superstructure to gear to the structural deformation of bridge
3.2
expansion and contraction installation for highway bridge
general term of various devices set at the expansion and contraction joints in order to make vehicles pass the bridge deck smoothly and gear to the deformation of bridge superstructure
3.3
expansion and contraction quantity
sum of expansion and contraction deformation of expansion and compressive installation
Note: Negative sign (-) indicates tensile deformation, and positive sign (+) indicates compressive deformation.
3.4
elastic bearing element
general term of tension bearing and compression bearing in expansion and contraction installation
3.5
longitudinal stagger
horizontal relative displacement of expansion and contraction installation along the center line of bridge
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3.6
transverse stagger
horizontal relative displacement of expansion and contraction installation along the direction vertical to the center line of bridge
3.7
vertical stagger
vertical relative displacement of expansion and contraction installation along the direction vertical to the bridge deck
4 Classification
4.1 Expansion and contraction installations for highway bridge (hereinafter referred to as “expansion and contraction installations”) are classified into the following by expansion and contraction installation:
a) modular expansion and contraction installation, coded as M;
b) pectinate plate expansion and contraction installation, coded as S;
c) seamless expansion and contraction installation, coded as W.
4.2 Modular expansion and contraction installations are classified into the following by the quantity of rubber sealing tape:
a) single-seam ones, coded as MA;
b) multi-seam ones, coded as MB.
4.3 Pectinate plate expansion and contraction installations are classified into the following by the stress conditions of pectinate plate:
a) cantilever ones, coded as SC;
b) simply-supported ones, coded as SS.
4.4 Simple-supported pectinate plate expansion and contraction installations are classified into the following by the relative position of toothed plate of the moveable pectinate plate and the expansion and contraction joint:
a) those with the toothed plate of the movable pectinate plate at one side of the expansion and contraction joint, coded as SSA;
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b) those with the toothed plate of the movable pectinate plate crossing the expansion and contraction joint, coded as SSB.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 General requirements
6 Technical requirements
7 Test methods
8 Inspection rules
Annex A (Normative) Requirements for the checking calculation of limit state of expansion and contraction installation
Annex B (Normative) Test method for deformation performance
Annex C (Normative) Test method for water resistance
Annex D (Normative) Test method for bearing performance
Annex E (Normative) Test method for clamping performance of rubber sealing tape
