Construction method for cross position of vehicle-traveling transverse cave and tunnel main cave based on temporary support system

A technology of temporary support and construction method, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve the problems of poor self-stabilization ability of fragmented surrounding rock, prone to landslides, etc., achieve good support effect and achieve stable support , the effect of reducing the risk of vault collapse

Active Publication Date: 2018-03-06
中铁二十局集团第二工程有限公司
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Problems solved by technology

The self-stabilization ability of the fragmented surrounding rock is extrem

Method used

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  • Construction method for cross position of vehicle-traveling transverse cave and tunnel main cave based on temporary support system
  • Construction method for cross position of vehicle-traveling transverse cave and tunnel main cave based on temporary support system
  • Construction method for cross position of vehicle-traveling transverse cave and tunnel main cave based on temporary support system

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Embodiment Construction

[0069] Such as figure 1 , figure 2 and image 3 As shown, the construction method based on the temporary support system at the intersection of the transverse tunnel for vehicles and the main tunnel of the tunnel, the design position of the transverse tunnel for vehicles 1 is located on the side of the design position of the main tunnel for vehicles, and the design axis of the transverse tunnel for vehicles 1 is in line with The design axis of the main tunnel of the tunnel intersects, and the main tunnel section of the tunnel at the intersection of the front end opening of the transverse tunnel 1 and the main tunnel of the tunnel is the intersection section 2 of the main tunnel of the tunnel; the cross section of the transverse tunnel 1 of the vehicle is designed to be a rectangular section; The specific construction includes the following steps:

[0070] Step 1. Construction of the upper part of the transverse tunnel for vehicles:

[0071] Step 101, Excavating the upper pa...

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Abstract

The invention discloses a construction method for the cross position of a vehicle-traveling transverse cave and a tunnel main cave based on a temporary support system. The designed position of the vehicle-traveling transverse cave is located on one side of the designed position of the tunnel main cave, the designed axis of the vehicle-traveling transverse cave and the designed axis of the tunnel main cave cross, and the designed cross section of the vehicle-traveling transverse cave is rectangular. In specific construction, the construction method comprises the following steps that firstly, anupper cave body of the vehicle-traveling transverse cave is constructed; secondly, an advanced large pipe shed is constructed; thirdly, an upper cave body at the tunnel main cave crossing section isconstructed; fourthly, arch frames of the upper cave body at the tunnel main cave crossing section is constructed; fifthly, vertical columns of main cave gantries are detached; sixthly, a lower cave body of the vehicle-traveling transverse cave is constructed; seventhly, a lower cave body at the tunnel main cave crossing section is constructed; eighthly, deformation finishing of the tunnel main cave crossing section is conducted; ninthly, a secondary lining of the tunnel main cave crossing section is constructed; and tenthly a secondary lining of the vehicle-traveling transverse cave is constructed. The construction requirements of the cross position of the vehicle-traveling transverse cave and the tunnel main cave in broken surrounding rock can be met.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a construction method at the intersection of a vehicle transverse tunnel and a tunnel main tunnel based on a temporary support system. Background technique [0002] In tunnel construction, it is often encountered in the case of construction in the fractured surrounding rock, the lithology of the surrounding rock is cataclast rock, which is one of dynamic metamorphic rocks. The original rock was broken by strong stress. It has a cracked structure or broken plaque structure. It can be formed by various rocks, but it is mainly developed in rigid rocks. Such as tile rock, sandstone, etc. Mostly block structure or band structure. The self-stabilization ability of the fragmented surrounding rock is extremely poor, and landslides are prone to occur during the construction process. Due to the weak geological conditions, collapse accidents are extremely prone ...

Claims

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Application Information

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IPC IPC(8): E21D9/14E21D9/00E21D11/00E21D11/18E21D20/00
CPCE21D9/001E21D9/14E21D11/00E21D11/18E21D20/00
Inventor 张建升刘晓书何武王群英时飞
Owner 中铁二十局集团第二工程有限公司
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