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Construction method of railway single-track tunnel with central deep-buried ditch in alpine region

A technology for tunnel construction and alpine regions. It is applied in tunnels, drainage, earthwork drilling and mining, etc. It can solve the problems that the construction method cannot meet the progress requirements and quality requirements, and achieve the effects of shortening the construction period, improving construction quality, and improving safety.

Active Publication Date: 2019-04-30
ZHENGZHOU ENG CO LTD CHINA RAILWAY SEVENTH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a construction method for a railway single-track tunnel with a central deep-buried ditch in an alpine region, with the purpose of solving the problem that the existing construction methods cannot meet the progress requirements and quality requirements

Method used

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  • Construction method of railway single-track tunnel with central deep-buried ditch in alpine region
  • Construction method of railway single-track tunnel with central deep-buried ditch in alpine region
  • Construction method of railway single-track tunnel with central deep-buried ditch in alpine region

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Embodiment Construction

[0024] In the following, the excavation depth of the deep buried ditch in the center is 3.27 meters (greater than the local maximum freezing depth of 1.1m), and the IV level surrounding rock single-line tunnel constructed by the upper and lower steps method is taken as an example to illustrate the central depth of the alpine zone described in the present invention. The railway single-track tunnel construction method of the buried ditch specifically includes the following steps:

[0025] The first step is to calculate the width of the upper opening, the length of the lower bottom, the depth of the ditch, the slope of the side slope, etc. The specific location of the deep-buried ditch 1 will be marked with red eye-catching paint after setting out on site, in preparation for the next step of drilling pre-splitting holes.

[0026] The second step, such as figure 1 As shown, the drilling and blasting excavation of the upper step 2 and lower step 3 of the tunnel and the drilling an...

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Abstract

The invention discloses a construction method of a railway single-track tunnel with a central deeply-buried ditch in a high and cold area. The construction method includes: performing staking out in survey to determine the specific position of the central deeply-buried ditch; performing drilling and blasting on a tunnel face, synchronously drilling vertical presplit holes, transverse auxiliary holes and peripheral holes in the to-be-excavated area of the excavation face of the central deeply-buried ditch, and then performing excavation; performing tunnel face residue discharge and tunnel primary support, and performing central deeply-buried ditch residue discharge and construction; repeating the steps above for 3-5 times, and performing inverted arch construction once when the excavation face of the central deeply-buried ditch advances 9-12m; performing circulating construction according to the steps above until the construction of the whole tunnel is completed. The construction methodhas the advantages that blasting and excavation are simultaneously performed on the tunnel face and the central deeply-buried ditch, field construction steps are regulated, the circulating construction method with reasonable steps is provided, tunnel construction quality can be increased greatly, construction cycle can be shortened, and manpower and material resource waste is reduced.

Description

technical field [0001] The invention relates to the technical field of single-track railway tunnel construction, in particular to a construction method for a railway single-track tunnel with a central deep-buried water ditch in an alpine region. Background technique [0002] In order to eliminate the impact of mountain water on the structural concrete of the railway tunnel, it is necessary to excavate trenches at the bottom of the tunnel to lay drainage pipes. In general, double-sided longitudinal drainage pipes should be installed first in single-track tunnels; double-sided and multi-track tunnels should be equipped with double-sided drainage pipes and central drainage pipes between the strands of the line, but the central drainage pipe should not be installed separately. When the railway tunnel is in an alpine region, it is also necessary to install an insulation layer on the outside of the pipe body to avoid the impact of water freezing on drainage. For example, the tunn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21F16/02
CPCE21D9/006E21F16/02
Inventor 秦法泽贾斌陈彬张东殷爱国李亚东郭立明武进广魏奎斐张帆
Owner ZHENGZHOU ENG CO LTD CHINA RAILWAY SEVENTH GRP
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