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Protective cutting construction method for tunnel segment

A technology of tunnel segment and construction method, applied in the field of construction engineering, can solve the problems of surrounding influence, protection of cutting area, damage of surrounding structure, etc.

Inactive Publication Date: 2009-04-29
SHANGHAI TUNNEL ENGINEERING CO. LTD.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods cannot protect the structure outside the cutting area, and it is easy to have an impact on the surrounding area during cutting, which is likely to cause damage to the surrounding structure

Method used

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  • Protective cutting construction method for tunnel segment
  • Protective cutting construction method for tunnel segment
  • Protective cutting construction method for tunnel segment

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Embodiment Construction

[0023] Below in conjunction with specific example and accompanying drawing, the present invention will be further described:

[0024] After the construction of the main tunnel structure of a project in Shanghai was completed, a dangerous situation occurred during the construction of the bypass passage, which caused the collapse of the nearby tunnel and the loss of soil near the tunnel. After repeated program demonstrations afterwards, the program of open cut and repair of tunnels in the entire subsidence area was adopted. After the collapse of the tunnel, the tunnel in the damaged section has been filled with soil and artificial grouting materials, and the intact tunnel has also been filled with muddy water. Before the construction of the underground diaphragm wall in the foundation pit, it is necessary to cut and clean the tunnel segments first. In order to prevent the intact tunnel from further subsidence and damage, the vertical freezing method is used to freeze the tunnel...

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Abstract

The invention relates to a construction method for protectively cutting a tunneltron piece, which belongs to the field of building engineering. The technical problem to be solved by the construction method is to overcome the defect that adjacent tunneltron pieces are damaged when a general construction method is used for cutting the tunneltron piece. The construction method adopts the technical proposal that: firstly, a filling hole is drilled on the upper part of a tunnel of a region to be frozen, and the frozen region tunnel is filled; secondly, a certain number of drill holes are drilled in the frozen region, and freezing pipes are arranged inside the holes; thirdly, low-temperature brine is conveyed through the freezing pipes for heat exchange, and a frozen cylinder is formed after the temperature is reduced; fourthly, the frozen cylinder is continuously widened to form a frozen wall along with continuation of the freezing effect; and fifthly, a hot brine circulating hole is constructed on the side of the frozen wall, the freezing range is controlled to be expanded to a cutting area, and special equipment is adopted for cutting the tunneltron piece in the cutting area. The construction method has low influence on the adjacent tunneltron pieces when cutting the tunneltron piece, and can be widely used for engineering construction such as cleaning of deep underground barriers, modification and construction of the prior tunnel under special operating conditions, and so on.

Description

technical field [0001] The present invention relates to a construction method for cleaning underground obstacles, especially on the premise of not destroying adjacent tunnel segments, using corresponding technical means to process adjacent tunnel segments and tunnel segments in the cutting area, and then carry out tunnel A construction method for protective cutting belongs to the field of construction engineering. Background technique [0002] With the accelerated development of China's urbanization process, unprecedented urban capital construction has ushered in, which inevitably involves the cutting and cleaning of deep underground obstacles including tunnel segments. The methods currently used at home and abroad to clear such deep obstacles include the rock machine method and the full-rotary drilling rig method. The principles of the two obstacle removal methods are basically the same, that is, the casing is driven to rotate under the joint action of down pressure and to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/115F25B1/00F25C1/00
Inventor 余喧平朱卫杰郭亮钱晔蔡兴华付军肖晓春郭享宿文德
Owner SHANGHAI TUNNEL ENGINEERING CO. LTD.
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