Long-span arch tunnel partly bright and partly dark construction method

A semi-dark, double-arch tunnel technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of using a lot of manpower, poor construction period risks, and high construction risks, so as to ensure the construction period and good social effects , The effect of reducing engineering risk

Active Publication Date: 2018-12-18
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

Generally speaking, when the grade of the road is not high, it is possible to reduce the project risk by guiding the road during the construction period, and then adopt the open cut method for construction; Excavation construction, often due to shallow burial, has a relatively high construction risk; when encountering

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  • Long-span arch tunnel partly bright and partly dark construction method
  • Long-span arch tunnel partly bright and partly dark construction method
  • Long-span arch tunnel partly bright and partly dark construction method

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[0056] The principles and features of the present invention are described below in conjunction with examples, which are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0057] In order to overcome the extreme construction conditions in the existing construction that can neither change the road nor adopt the underground excavation method, a half-light and half-dark construction method for long-span multi-arch tunnels is provided, which includes the following steps: Step 1, carry out on-site construction according to the construction drawings measurement stakeout;

[0058] Step 2. According to the measurement and lofting, construct the central pilot tunnel, and pour the central partition wall after the central pilot tunnel is penetrated;

[0059] Step 3, after completing the partition wall, set up the advanced pipe shed in the dark tunnel section;

[0060] Step 4: After completing the advanced pipe shed in the dark tun...

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Abstract

The present invention relates to a long-span arch tunnel partly bright and partly dark construction method. The method comprises the steps of: according to construction, performing field layout survey; performing pilot tunnel in the process of construction, pouring a middle wall after the pilot tunnel is cut through; arranging a dark hole section lead pipe shed; arranging mini pile grouting reinforcement soil bodies at two sides of the tunnel; constructing a partly bright and partly dark section vault and cover arch cover plate; employing a benching tunneling construction method to construct left and right holes of the tunnel, and constructing temporary inverted arches of the left and right holes; dismounting the temporary inverted arches of the left and right holes, and constructing archwall secondary lining for the left and right holes; constructing a tunnel accessory structure, and completing the construction. The long-span arch tunnel partly bright and partly dark construction method is a construction method suitable for an extreme condition with a relatively high road grades, without a road change condition and that an undermining method cannot be employed for construction. The long-span arch tunnel partly bright and partly dark construction method overcomes the limitation of the traditional construction method, avoid large engineering risk and ensure the normal pass of the roads during the tunnel construction.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a half-light and half-dark construction method for a long-span multi-arch tunnel. Background technique [0002] With the advancement of urbanization in my country, the above-ground space resources are becoming more and more scarce, and the development of road systems has gradually changed from above-ground to underground, and a large number of municipal tunnel projects have emerged. The construction of municipal tunnels will inevitably encounter the situation of passing through existing roads, and the contradiction between ensuring the normal passage of existing roads and reducing project risks is becoming more and more prominent. Generally speaking, when the grade of the road is not high, it is possible to reduce the project risk by guiding the road during the construction period, and then adopt the open cut method for construction; Excavation construction, often du...

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Application Information

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IPC IPC(8): E21D11/10
CPCE21D11/105
Inventor 徐威张航张昌伟张清峰
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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