Tunnel construction method

A technology for tunnel construction and tunneling, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., and can solve problems such as tunnel collapse and high safety risks

Pending Publication Date: 2021-05-28
中铁二十局集团第三工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to propose a tunnel construction method, which aims to solve the problems in the prior art that the tunnel is easy to collapse during the tunnel construction process, and the safety risk is relatively large.

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no. 2 example

[0112]Further, based on the above embodiment, the second embodiment of the tunnel construction method of the present invention, and step S620 include:

[0113]Step S621, the inclination of the base hole is measured by the inclinometer;

[0114]Step S622, according to the speed of the drilling, the geological information of the drilling position and the drill pressure, and the geological cross-sectional view is drawn according to geological information;

[0115]Step S623, determine whether the drilling position of the steel gaute 5 is reasonable according to the geological cross-sectional view.

[0116]Step S624, if yes, the drilling construction is continued;

[0117]Step S625, if, then re-determine the borehole position of the steel tube 5.

[0118]During the drilling process, its position is often used, and the phenomenon of the drilling rig is judged according to the phenomenon of the drilling rig, and the accident occurring during the drilling process will be handled in time; and the motorizer, s...

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Abstract

The invention discloses a tunnel construction method. The method comprises the steps that arc excavation is conducted along a top arch of an upper pilot tunnel of a tunnel section, and an arc hole and a center upper step are formed; primary lining layer construction of the upper pilot tunnel is conducted along the arc hole, so that tunnel surrounding rock soil is stably supported; the center upper step is excavated, and temporary inverted arch construction is conducted at the bottom of the upper pilot tunnel, so that the upper pilot tunnel is separated; excavation is conducted along the two sides of a lower pilot tunnel of the tunnel section, and a lower side hole and a center lower step are formed; primary lining layer construction of the lower pilot tunnel is conducted along the lower side hole, so that the tunnel surrounding rock soil is stably supported; the center lower step is excavated, and secondary lining layer construction of a tunnel bottom plate in the lower pilot tunnel is conducted; and a temporary inverted arch is dismantled, and secondary lining layer construction of a main tunnel body is conducted. According to the tunnel construction method, the tunnels are excavated step by step, the tunnel excavation working face is increased, the construction progress is high, and the construction period is shortened; and meanwhile, the excavation area of each time is small, supporting construction can be conducted in time, and the safety of tunnel excavation construction is guaranteed.

Description

Technical field[0001]The present invention relates to the field of tunneling construction, and in particular, to a tunnel construction method.Background technique[0002]Since the urban land is affected by human activities, and the downsome rock is the land phase crash rock, the water is weak, and the surface of the surface is rich in water, the water is large, and the surrounding water is faster. Groundwater rich in groundwater is controlled by terrain, rock resistance and fracture development, replenishing at atmospheric rainfall and water supply pipeline, resulting in uneven settlement of rock formations, possibly cause ground cracking, construction cracking and tilt, etc., and pile base The adverse effects of holes also have weathering rocks distributed throughout the site of the base rock surface, weathered fracture development, soft rocky, and rock mass, which is easy to damage the original stress balance of rock mass during the tunnel excavation. If not take effective construct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/04E21D11/00E21D11/10E21D11/15E21D11/18
CPCE21D9/04E21D11/006E21D11/18E21D11/105E21D11/152
Inventor 吴青华屈家奎周启宏刘仁华刘璋李飞苏舫张军
Owner 中铁二十局集团第三工程有限公司
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