GB/T 22082-2024 Reinforced concrete segments
1 Scope
This document specifies the classification, dimensions and designation, raw materials, general requirements, technical requirements, test methods, inspection rules, marking and end-of-manufacturing certificate, storage and transportation of reinforced concrete segments.
This document is applicable to the design, manufacture and inspection of reinforced concrete segments for rail transit, highway, railway, hydraulic engineering, municipal administration, oil and gas, electric power and other tunnel projects as well as urban underground utility tunnels.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions 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 175 Common portland cement
GB/T 1499.1 Steel for the reinforcement of concrete - Part 1: Hot rolled plain bars
GB/T 1499.2 Steel for the reinforcement of concrete - Part 2: Hot rolled ribbed bars
GB/T 1596-2017 Fly ash used for cement and concrete
GB 8076 Concrete admixtures
GB/T 14684 Sand for construction
GB/T 14685 Pebble and crushed stone for construction
GB/T 18046-2017 Ground granulated blast furnace slag used for cement, mortar and concrete
GB/T 21120 Synthetic fibres for cement concrete and mortar
GB/T 23265 Chopped basalt fiber for cement concrete and mortar
GB/T 38143 Alkali-resistant glass fibres for cement concrete and mortar
GB/T 39147 Steel fiber for concrete
GB 50010 Code for design of concrete structures
GB/T 50080 Standard for test method of performance on ordinary fresh concrete
GB/T 50081 Standard for test methods of concrete physical and mechanical properties
GB/T 50082 Standard for test methods of long-term performance and durability of ordinary concrete
GB/T 50107 Standard for evaluation of concrete compressive strength
GB 50164 Standard for quality control of concrete
GB/T 50476 Standard for design of concrete structure durability
JC/T 2030 Technical rules of reinforced concrete segments
JC/T 2351 The safety code for reinforced concrete segments production
JG/T 3064 Steel fiber reinforced concrete
JGJ 55 Specification for mix proportion design of ordinary concrete
JGJ 63 Standard of water for concrete
JGJ/T 221 Technical specification for application of fiber reinforced concrete
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
reinforced concrete segment
basic element of tunnel precast lining ring made of steel bars and concrete as the main raw materials
Note: It is referred to as "segment" for short.
3.2
test of leakage
test of applying water pressure to the outer arc surface of concrete segment step by step, and observing the leakage of water on the inner arc surface and assembled surface of concrete segment
3.3
test of horizontal assembling
assembly of two-ring or three-ring segments along the vertical direction, while the inner diameter of the segment ring, the outer diameter of the segment ring, and the splicing gap between the rings and between the blocks are measured
3.4
test of bending
testing the deformation of the concrete segment under the bending load as well as the generation and change of cracks on the segment surface after the bending design loads are applied to the concrete segments
3.5
test of anti-pulling
testing the deformation of the pre-embedded part under the pull-out loads as well as the generation and change of cracks in the concrete segment under the pull-out loads after the pull-out design loads are applied to the pre-embedded stressed components in the central lifting holes of the concrete segments
4 Classification, specifications and marking
4.1 Classification
4.1.1 Segments are classified by tunnel alignment after the segments are assembled into a ring into three categories: straight-line segment (Z), curve-line segment (Q), and universal segment (T) applicable to both straight-line and curve-line sections. Curve-line segments are further classified into left-curved segment (ZQ), right-curved segment (YQ), and vertical-curved segment (SQ).
4.1.2 Segments are classified by assembly positions within the ring into standard block (B), adjacent block (L1, L2), and closure block (F).
4.1.3 Segments are classified by cross-sectional shape of the tunnel into circular (Y), oval (TY), rectangular (J), quasi-rectangular (LJ), double-circular (SY), and special-shaped (YY).
4.2 Specifications
Common specifications of segments are shown in Table 1.
Contents
Foreword
1 Scope
2 Normative References
3 Terms and definitions
4 Classification, specifications and marking
5 Raw Materials
6 General requirements
7 Technical requirements
8 Test methods
9 Inspection rules
10 Marking and end-of-manufacturing certificate
11 Storage and transportation
Annex A (Normative) Test method for leak detection
Annex B (Normative) Test method for bending resistance
Annex C (Normative) Test method for anti-pulling performance
