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Reverse slope tunnel construction method

A technology for tunnel construction and steps, applied in tunnels, tunnel linings, earth-moving drilling and mining, etc., can solve problems such as easy falling blocks, landslides or water inrush, roof fall, etc., to ensure integrity, reduce adverse effects, and prevent falling blocks. Effect

Active Publication Date: 2018-10-19
CHINA COMM NORTH ROAD & BRIDGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to provide a reverse slope tunnel construction method to solve the existing tunnel construction methods are easy to drop blocks, roof caving, chip side, landslide or sudden water problems

Method used

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Embodiment Construction

[0025] Embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art would recognize that the described embodiments can be modified in various ways or combinations thereof without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Also, in this specification, the drawings are not drawn to scale, and like reference numerals denote like parts.

[0026] Combine below figure 1 and figure 2 This embodiment will be described in detail.

[0027] figure 1 It is a schematic flow chart of the reverse slope tunnel construction method described in the present invention, figure 2 It is a schematic diagram of the tunnel construction tunnel face structure in the present invention, such as figure 1 and figure 2 As shown, the reverse slope tunnel construction method of the present invention comp...

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Abstract

The invention discloses a construction method of a reverse slope tunnel, which comprises the following steps: an arc-shaped heading is excavated in a circular shape, a core soil is reserved, and a first step is excavated; two second steps and two third steps reserved on the left and right sides of the core soil are respectively excavated, and the shotcrete and anchor support is carried out; the reserved core soil is excavated; an inverted arch is excavated and the initial support of the inverted arch is made; a waterproofing plate of the inverted arch is laid, and the side wall concrete is poured; after the pouring of the inverted arch concrete is completed, the inverted arch shall be backfilled in time, and the construction of secondary lining of the concrete shall be carried out. According to the invention, the construction of the reverse slope tunnel under the water level line of the adjacent reservoir is carried out, and the reverse slope is being made positive, so that the water seepage and the water inflow of the first step and the second step tunnel face can be timely discharged to the temporary water collecting pit of a third step to prevent the tunnel surrounding rock fromfalling out of the block, roof falling, landsliding or water inflowing. The integrity of the tunnel surrounding rock can be ensured, and the adverse effect on the reservoir and the surrounding environment can be reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a construction method for reverse slope tunnels. Background technique [0002] The reverse slope tunnel construction is directed to the downhill direction of the construction in the tunnel. The water in the tunnel flows to the working face and needs to be pumped in time to prevent the water from accumulating too deep on the construction face and affecting the stability of the surrounding rock of the tunnel. , and endanger the safety of mechanical equipment and construction personnel in tunnel construction. [0003] For the reverse slope tunnel excavation below the water level line of the expressway near the reservoir, the tunnel construction method is particularly important due to the poor integrity of the tunnel surrounding rock, easy softening in contact with water, weak lateral pressure resistance, and weak self-stabilization ability. The surrounding environment h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D20/00E21D11/10E21D11/38E21F16/02
CPCE21D9/00E21D11/105E21D11/38E21D20/00E21F16/02
Inventor 刘丹娜殷胜光杨伟威朱文博
Owner CHINA COMM NORTH ROAD & BRIDGE
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