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Construction method of horseshoe-shaped large-section tunnel

A tunnel construction, horseshoe-shaped technology, applied in tunnels, tunnel lining, earthwork drilling and mining, etc., can solve the problems of low utilization rate of large-section tunnel equipment and low construction efficiency

Active Publication Date: 2020-06-12
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for a horseshoe-shaped large-section tunnel to solve the technical problems of low equipment utilization and low construction efficiency in large-section tunnels

Method used

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  • Construction method of horseshoe-shaped large-section tunnel
  • Construction method of horseshoe-shaped large-section tunnel

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Embodiment 1

[0021] Embodiment 1: A construction method for a horseshoe-shaped large-section tunnel, which separates and forms at least four construction areas on the horseshoe-shaped section of the tunnel, wherein the construction area ① corresponds to the arch of the horseshoe-shaped section, and corresponds to the construction area of ​​the upper step. The upper edge of area ④ is not lower than the inverted arch and guide platform of the tunnel, corresponding to the lower step construction area, construction area ② and construction area ③ correspond to the middle step construction area, and the construction area ③ is not smaller than the construction area ②, corresponding to For the specific construction environment of this embodiment, see figure 1 , the height of the construction area of ​​the upper step is 6.3m, the height of the construction area of ​​the middle step is 2.0m, and the height of the construction area of ​​the lower step is 3.1m.

[0022] Including the following steps: ...

Embodiment 2

[0029] Example 2: A construction method for a horseshoe-shaped large-section tunnel. In order to further improve the construction efficiency, the first construction team back-excavated the construction area ④ from the end of the design mileage, and at the same time reversed the construction from the end of the design mileage to form a pouring floor And install the inverted arch and guide platform. During the process of forward excavation of the construction area ④ by the second construction team, at the same time, construct in the forward direction to form the pouring floor and install the inverted arch and guide platform. Because the construction process of pouring the base plate and installing the inverted arch and the guide platform lags behind, one end of the trestle bridge needs to be erected on the virtual slag platform, and the other end of the trestle bridge is erected on the pouring base plate. When the material delivery vehicle 62 passed the trestle, the construction ...

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Abstract

The invention discloses a horseshoe-shaped large-section tunnel construction method, and aims to solve the technical problem of low construction efficiency of a large-section tunnel. A horseshoe-shaped section of a tunnel is divided into at least four construction areas, wherein a construction area (1) corresponds to the arch part of the horseshoe-shaped section, the upper edge of a construction area (4) is not lower than an inverted arch and a guide table of the tunnel, a construction area (2) and a construction area (3) correspond to the middle step construction area; and the construction area (3) is not smaller than the construction area (2), long-step construction is conducted through at least three construction teams, the non-construction area is used as a material conveying channel,and therefore the transportation amount of a slag discharging vehicle is kept to be matched with the excavation square amount, and the construction efficiency of the horseshoe-shaped large-section tunnel is improved.

Description

technical field [0001] The invention relates to a tunnel construction method, in particular to a horseshoe-shaped large-section tunnel construction method. Background technique [0002] The International Tunneling Association's classification standard for tunnel sections is: clear section area < 3.0m 2 It is an ultra-small section; the clear section area is ≥3.0m 2 And ≤10.0 m 2 It is a small cross-section; the clear cross-sectional area > 10.0m 2 And ≤50.0 m 2 It is a medium cross-section; the clear cross-sectional area is >50.0m 2 And ≤100.0 m 2 It is a large cross-section; the clear cross-sectional area > 100.0m 2 For super large section. [0003] In tunnel construction, large-section tunnels and super-large-section tunnels have large sections, and the risk of full-section excavation is high. The common knowledge in the industry is that the step excavation method can also shorten the construction period. Contents of the invention [0004] The purpose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D11/18F42D3/00
Inventor 陈艺升程涛宋书显邓洋李吉昌张洋段建庄谢潇鹏刘广沛苏志愿钟查军谢卫林侯守栋张存博
Owner CHINA RAILWAY TUNNEL GROUP CO LTD