Tunnel secondary lining arch unit and the arch structure and erection method formed by it

A technology of secondary lining and arch frame, applied in tunnel lining, tunnel, shaft lining and other directions, can solve the problems of reducing waterproof capacity, increasing the risk during tunnel operation, reducing the life of secondary lining, etc. Good application prospect and promotion value, high work efficiency

Active Publication Date: 2019-05-21
CHANGAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in rich water tunnels, the waterproofing capacity is greatly reduced after the waterproof board is damaged, and the outer circumferential steel bars are corroded and corroded more seriously, which not only reduces the life of the secondary lining, but also increases the tunnel operating time. risk

Method used

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  • Tunnel secondary lining arch unit and the arch structure and erection method formed by it
  • Tunnel secondary lining arch unit and the arch structure and erection method formed by it
  • Tunnel secondary lining arch unit and the arch structure and erection method formed by it

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Such as Figure 1 ~ Figure 4 As shown, a tunnel secondary lining arch unit includes three arch unit main reinforcements 1 of the same length, and the three arch unit main reinforcements 1 together form an arch unit frame with an equilateral triangle cross section. The main reinforcement 1 of the arch unit is made of HRB335 or HRB400 steel, and the diameter of the main reinforcement 1 of the arch unit is 20mm-28mm. The exterior of all arch unit frames is fixedly connected by several stirrups 2 to form an arch unit skeleton, and the two ends of the arch unit skeleton are respectively fixedly connected with connecting angle steel 3, and bolt holes 4 are opened on the connecting angle steel 3. In this embodiment, The connecting angle steel 3 is made of Q235 steel material. Such as figure 1 , figure 2 As shown, the stirrups 2 are arranged at regular intervals along the length direction outside the arch unit frame; the stirrups 2 are made of HRB335 steel bar material or HRB...

Embodiment 2

[0048] Such as Figure 1 ~ Figure 4 As shown, a tunnel secondary lining arch unit includes four arch unit main reinforcements 1 of the same length, and the four arch unit main reinforcements 1 together form an arch unit frame with a square cross-section, and two adjacent arch units The net spacing of the main reinforcement 1 of the unit is 350mm. The exterior of all the arch unit frames are fixedly connected by a number of stirrups 2 to form an arch unit skeleton, and the two ends of the arch unit skeleton are respectively fixedly connected with connecting angle steel 3 , and bolt holes 4 are opened on the connecting angle steel 3 .

[0049] Such as figure 1 , figure 2 As shown, the stirrups 2 are arranged at regular intervals along the length direction outside the frame of the arch unit.

[0050] Such as image 3 As shown, two bolt holes 4 are opened on the connecting angle steel 3, and bolts and nuts 5 are installed in the bolt holes 4; the connecting angle steel 3 is f...

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Abstract

The invention discloses a tunnel secondary lining arch unit and its formed arch structure and erection method. The tunnel secondary lining arch unit includes at least three main ribs of the arch unit with the same length. The arch unit skeleton is fixedly connected by several stirrups, and the two ends of the arch unit skeleton are fixedly connected with connecting angle steel; the arch structure includes several tunnel secondary lining arch units, and all tunnel secondary lining arch units The arc-shaped arch frame is connected by bolts and nuts in sequence; the outer side of the arc-shaped arch frame is welded and fixedly connected with the outer layer of the main reinforcement, and the inner side of the arc-shaped arch frame is welded and fixedly connected with the inner layer of the main rib. The arch frames are spaced in parallel and arranged side by side to form an arch assembly. The invention can accurately locate the position of the secondary lining double-layer reinforcement mesh, ensure that the thickness of the concrete protective layer of the double-layer reinforcement meets the design requirement, and can effectively avoid the phenomenon that the waterproof board is punctured at the same time.

Description

technical field [0001] The invention relates to the technical field of loess tunnel construction, in particular to a tunnel secondary lining arch unit, an arch structure formed by it, and an erection method. Background technique [0002] At present, a technical problem in the secondary lining construction of tunnels is how to locate the first hoop reinforcement of the secondary lining. The traditional positioning method is to weld the steel bars selected for the design to the designed length, and then manually bend them into shape. During the forming process, the friction between the steel bars and the tunnel waterproofing board is relatively large, resulting in varying degrees of damage to the waterproofing board and reducing the waterproofing. board life. At the same time, the formed outer layer of hoop reinforcement is in close contact with the waterproof board. When the secondary lining concrete is pumped, the thickness of the concrete protective layer of the outer hoop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10
CPCE21D11/107
Inventor 宿钟鸣高一杰姚广何信薛晓辉庞新刚
Owner CHANGAN UNIV
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