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Construction structure and construction method for controlling settlement of shallow-buried and underground-excavated large-section tunnel

A technology of shallow burial and tunnel settlement, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve the problems of irregular process operation, lax tunnel construction management, etc., to achieve strong operability, win-win social benefits, and construction. simple craftsmanship

Pending Publication Date: 2020-07-31
中交哈尔滨地铁投资建设有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to factors such as lax tunnel construction management and irregular process operations, the actual surface settlement and deformation far exceeded the design control standard

Method used

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  • Construction structure and construction method for controlling settlement of shallow-buried and underground-excavated large-section tunnel
  • Construction structure and construction method for controlling settlement of shallow-buried and underground-excavated large-section tunnel
  • Construction structure and construction method for controlling settlement of shallow-buried and underground-excavated large-section tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A construction structure for controlling the settlement of a shallow-buried large-section tunnel. The construction structure for controlling the settlement of a shallow-buried large-section tunnel includes an elliptical structure surrounded by four fan-shaped caverns and a structure laid on the ground. Ground steel beams 2, each of the fan-shaped caverns is surrounded by a support structure, and the support structure is composed of two layers of steel mesh 4 arranged outside the fan-shaped cavern and the two layers of steel mesh. A plurality of reinforcement grids 3 are laid between the reinforcement meshes, and a plurality of locking anchor rods 1 are arranged on the ground steel beams to pass through the holes on the ground and then welded in the reinforcement grids.

Embodiment 2

[0050] According to the construction structure for controlling the settlement of a large-section shallow-buried excavation tunnel described in Example 1, the ground steel beam is a structure formed by vertical cross-welding of a transverse steel beam 9 and a longitudinal steel beam 9 .

Embodiment 3

[0052] According to the construction structure for controlling the settlement of shallow-buried large-section tunnels described in embodiment 1 or 2, the lock-foot anchor rod includes two parallel steel plates 13 and is welded between the two steel plates. The rib plate 14, one end of the finish-rolled rebar 11 passes through the two layers of steel plates and is screwed with a nut 16, and the other end of the finish-rolled rebar is sheathed with a bellows 12.

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Abstract

The invention discloses a construction structure and a construction method for controlling settlement of a shallow-buried and underground-excavated large-section tunnel. A full-section method has thedefects that the stability of surrounding rock is reduced due to a large excavation surface, and a double-side-wall heading method is safe in construction, but low in speed and high in cost. The construction structure comprises an oval structure defined by four fan-shaped chambers and ground steel beams (2) laid on the ground, wherein a supporting structure is arranged outside each fan-shaped chamber in a surrounding mode, each supporting structure is composed of two layers of reinforcing meshes (4) arranged outside the corresponding fan-shaped chamber and a plurality of reinforcing grids (3)laid between the two layers of reinforcing meshes, and a plurality of locking anchor rods (1) are arranged on the ground steel beams, pass through holes in the ground and then are welded in the reinforcing grids. The construction structure and the construction method are used for controlling the settlement of the shallow-buried and underground-excavated large-section tunnel.

Description

Technical field: [0001] The invention relates to a construction structure and a construction method for controlling the settlement of a shallow-buried underground excavation large-section tunnel. Background technique: [0002] The existing construction experience and technical achievements at home and abroad show that according to the geological conditions and the size of the excavation face, the construction methods of shallow buried tunnels mainly include the full-section method, the upper and lower steps method, the single-side-wall pilot-pit method, and the double-side-wall pilot tunnel method. Pit method, etc. [0003] The full-face excavation method is also called the full-face excavation method. The excavation section is designed according to the tunnel, and the construction method is excavated in place at one time. There are three main excavation methods: the new Austrian full-section excavation method, the full-section excavation method of the guard plate and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/15E21D11/10E21D11/14E21D20/00E21D11/38
CPCE21D9/00E21D9/001E21D11/10E21D11/14E21D11/152E21D11/38E21D20/00
Inventor 权县民刘运生张强聂善军邹新祥蔡国庆类兴珂孟长青李会良李坤泓梁宇黄磊李舰
Owner 中交哈尔滨地铁投资建设有限公司
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