Reinforcement method for combined part of shield tunnel and mining-method tunnel

A technology of shield tunneling and mining method, applied in tunnels, tunnel linings, mining equipment, etc., can solve problems such as water and soil loss, poor water-stop effect, and emergency rescue difficulties, and improve and reduce soil strength and water-stop performance The risk of soil erosion and the effect of ensuring the safety of entering the hole

Inactive Publication Date: 2012-04-04
SHANGHAI ROAD & BRIDGE (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Nevertheless, the above method still has many deficiencies. For example, the shield machine advances to the sealing wall. If the sealing wall is not removed, the end wall will easily collapse and the soil will be lost. The risk is extremely high; if the soil in front is not reinforced, The water-stop effect is not good, and the soft ground is prone to landslides; after the landslide, it is difficult to rescue; the water-stop effect cannot be guaranteed by using embedded parts, and it is easy to cause water and soil loss, etc.

Method used

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  • Reinforcement method for combined part of shield tunnel and mining-method tunnel
  • Reinforcement method for combined part of shield tunnel and mining-method tunnel
  • Reinforcement method for combined part of shield tunnel and mining-method tunnel

Examples

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Embodiment Construction

[0037] In a civil shield tunnel of a subway project, where the length of the middle part of the left line is 147.5m and the length of the middle part of the right line is 287m, it is necessary to use the mining method to construct the initial lining of the tunnel, and then use the shield machine to assemble the segments and push them through. The mine method tunnel forms the second lining of the tunnel, so the two joint reinforcement methods of the present invention are respectively used in the construction of the left line and the right line.

[0038] The reinforcement treatment measures for the junction of the shield tunnel on the left line and the mining method tunnel are as follows:

[0039] The construction of the left-line mining method tunnel is completed first, so the shield machine of the present invention is used to advance into the construction method of the mining method tunnel, and the specific technical measures are as follows:

[0040] 1) After the excavation of...

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Abstract

The invention discloses a reinforcement method for a combined part of a shield tunnel and a mining-method tunnel. The reinforcement method is used for using a shield machine to propel and enter the mining-method tunnel and comprises the following steps of: 1) primarily spraying concrete on a working face of the mining-method tunnel so as to prevent local collapse of the tunnel; 2) horizontally placing gratings at the positions of end walls of the mining-method tunnel and spraying the concrete after being fixed; 3) adopting a plurality of grouting pipes for injecting slurry at the end walls of the mining-method tunnel so as to carry out reinforcement; and 4) adopting plain concrete to block the full cross sections at the two end walls of the mining-method tunnel and the shield tunnel.

Description

technical field [0001] The invention relates to the technical field of underground excavation, in particular to a method for reinforcing the junction of a shield tunnel and a mining method tunnel. Background technique [0002] With the continuous improvement of the development and utilization of urban underground space, shield tunneling has encountered a variety of complex areas during construction, such as soft and hard interbedded sections, sections with boulders and slightly weathered high-hardness rock sections, or encountered Obstacles such as building pile foundations are difficult to construct by relying solely on shield tunneling at this time. For strata with a length of more than 100m and rock uniaxial compressive strength of more than 80MPa, there are no reports of successful cases of pure shield tunneling at home and abroad. For an interval tunnel, if the deep buried section in the middle encounters hard unweathered or slightly weathered rock strata, and the shal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/18E21D11/38
Inventor 董泽龙徐飞王铁张振光王帅顾鲁孚王黄伟施利兵关伟
Owner SHANGHAI ROAD & BRIDGE (GRP) CO LTD
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