Small-section long-distance soft rock tunnel construction method

A construction method and small-section technology, applied in the construction field of infrastructure engineering technology, can solve problems such as ambiguous design specifications and standards for waterproofing and drainage, inconsistent principles and selection methods for waterproofing and drainage, and difficulties in technical measures for waterproofing and drainage, etc. Poor self-stability of soft rock, good working environment, and the effect of reducing potential safety hazards

Active Publication Date: 2020-08-18
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, the principles and selection methods of waterproofing and drainage are not uniform. Compared with foreign countries, the existing design specifications and standards for waterproofing and drainage are not clear, which brings difficulties in the implementation of technical measures for waterproofing and drainage;
[0005] The selection of ventilation and dust removal meth

Method used

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  • Small-section long-distance soft rock tunnel construction method
  • Small-section long-distance soft rock tunnel construction method
  • Small-section long-distance soft rock tunnel construction method

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Embodiment Construction

[0049] The present invention is described in further detail below by embodiment, and embodiment is only used for illustrating the present invention, does not limit the scope of the present invention.

[0050] see Figure 1-7 A construction method for a small-section long-distance soft rock tunnel shown, comprising the following steps:

[0051] 1. Excavation in the tunnel and dust removal in the tunnel

[0052] (1) Roadheader excavation

[0053] First, clean the surface of the cantilever roadheader, the second conveyor, the laser pointing device, the fan, and the site; do a good job of field leveling to ensure accurate positioning of the laser pointing device and a good construction environment for the cantilever roadheader;

[0054] Then install the laser pointer by professional surveyors,

[0055] After the laser pointing device is installed and fixed firmly, use measuring instruments to measure the position and direction of the laser center line of the laser pointing devi...

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Abstract

The invention belongs to the field of infrastructure engineering technology construction, and relates to a small-section long-distance soft rock tunnel construction method. According to the method, the excavation technology for the small-section long-distance soft rock tunnel is summarized; in the construction process, the ventilation, smoke exhaust and water drainage methods of the tunnel are studied; a primary support section form is designed according to the type of tunnel surrounding rock; and through the research on the difficulty in concrete transportation and warehousing strength in thetunnel lining construction since the surrounding rocks are divided into IV type and V type, the rocks are soft rocks and extremely soft rocks, and the tunnel construction is influenced by ''small'' and ''long'', the characteristics of the project and the requirements on the engineering construction technology and quality are combined, and the on-site construction process is improved and optimized, so that the safe and efficient construction purpose is gradually achieved.

Description

technical field [0001] The invention belongs to the construction field of infrastructure engineering technology, and relates to a construction method for a small-section long-distance soft rock tunnel. Background technique [0002] In recent years, many soft rock tunnels have been built at home and abroad. However, due to the long lines, many faults, high external water, and complicated hydrogeological conditions, it is difficult to clarify the preliminary geological survey work, and the current design theory at home and abroad is still not perfect. , it is necessary to use various theories and methods for analysis and calculation, combined with experience, engineering analogy, etc. to carry out comprehensive analysis and research for pre-design, and during the construction period, the on-site design and construction geological catalog personnel will combine the actual excavation geological conditions and safety monitoring and other data to conduct surrounding rock analysis. ...

Claims

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Application Information

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IPC IPC(8): E21D9/10E21D9/00E21D9/12E21F5/04E21D11/10E21D11/15E21D20/00E21F16/00
CPCE21D9/003E21D9/10E21D9/12E21D11/10E21D11/152E21D20/00E21F5/04E21F16/00
Inventor 王云鹏赵喜云朱晓轲王伟奇王凯
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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