Tunnel secondary lining arch frame unit, arch frame structure constituted by same and erection method of arch frame structure

A secondary lining and arching technology, which is applied in the direction of tunnel lining, tunnel, shaft lining, etc., can solve the problems of increasing the risk during tunnel operation, reducing the life of the secondary lining, and reducing the waterproof ability, etc., to achieve good application prospects and promotion value, high work efficiency, and the effect of preventing the rollover of steel bars

Active Publication Date: 2017-05-31
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 frame unit, arch frame structure constituted by same and erection method of arch frame structure
  • Tunnel secondary lining arch frame unit, arch frame structure constituted by same and erection method of arch frame structure
  • Tunnel secondary lining arch frame unit, arch frame structure constituted by same and erection method of arch frame structure

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Such as Figure 1 to 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 HR...

Embodiment 2

[0048] Such as Figure 1 to 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 ...

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Abstract

The invention discloses a tunnel secondary lining arch frame unit, an arch frame structure constituted by the same and an erection method of the arch frame structure. The tunnel secondary lining arch frame unit comprises at least three arch frame unit main ribs with the same length, the exteriors of all arc frame unit frames are fixedly connected into an arc frame unit framework through a plurality of stirrups, and the two ends of the arc frame unit framework are each fixedly connected with a piece of connection angle steel. The arch frame structure comprises a plurality of tunnel secondary lining arch frame units, all the tunnel secondary lining arch frame units are connected into an arc-shaped arch frame in sequence through bolts and nuts; the outer side of the arc-shaped arch frame is fixedly connected with outer layer of circumferential main ribs in a welded mode, and the inner side of the arc-shaped arch frame is fixedly connected with inner layer of circumferential main ribs in a welded mode; and a plurality of arch-shaped arc frames are arranged side by side in parallel at intervals to from an arch frame assembly. According to the tunnel secondary lining arch frame unit, the position of a double-layer reinforcing rib net of a tunnel secondary lining can be accurately positioned, and it is ensured that the concrete protection layer thickness of double layers of reinforcing ribs meets the design requirement, and meanwhile, the phenomenon that a waterproof plate is punctured can be effectively avoided.

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 Applications(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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