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Grouting construction method and grouting structure for tunnel to underpass existing line in close range

Pending Publication Date: 2022-04-29
北京住总集团有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the existing line sinks, it is necessary to adjust the grouting scheme and grouting angle

Method used

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  • Grouting construction method and grouting structure for tunnel to underpass existing line in close range
  • Grouting construction method and grouting structure for tunnel to underpass existing line in close range
  • Grouting construction method and grouting structure for tunnel to underpass existing line in close range

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Embodiment Construction

[0031] The following detailed description is given in conjunction with the accompanying drawings.

[0032] The invention provides a grouting construction method and a grouting structure in which a tunnel penetrates an existing line in a short distance.

[0033] A grouting construction method in which a tunnel penetrates an existing line in a short distance, the method at least comprises:

[0034] S1: In the case of supporting the existing line, remove the original soil layer between the preset tunnel and the existing line.

[0035]The method of supporting the existing line in the present invention is as follows: after the parameter setting of the tunnel to be built is completed, several small-sized working holes are arranged in the area between the tunnel to be built and the existing line, and construction is carried out step by step. In small-scale work holes, especially those close to existing lines, remove soil layers close to existing lines and use jacks, piles and / or bea...

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PUM

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Abstract

The invention relates to a grouting construction method and a grouting structure for a tunnel to underpass an existing line at a short distance, and the method at least comprises the steps: removing a preset original soil layer between the tunnel and the existing line under the condition of supporting the existing line; at least one bearing layer (3) capable of supporting the existing line is arranged in an original soil layer area between the tunnel and the existing line; wherein the force bearing layer (3) is of a hexagonal grid structure which is formed by splicing a plurality of force bearing assemblies (7) and is nested with one another; and nodes gathered at the end parts of the plurality of force-bearing assemblies (7) form a force-bearing column in a grouting manner. According to the grouting construction method, the number of grouting steps is small, the grouting pressure is small, the formed grouting structure is small in weight, high in bearing capacity and good in stability, deformation of an existing line can be avoided, and the pressure borne by a tunnel can be reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel penetration, in particular to a grouting construction method and a grouting structure for tunnels to penetrate existing lines in a short distance. Background technique [0002] In the prior art, the distance between the tunnel and the existing line structure is within 0-2m when the tunnel structure is constructed under the existing line subway station and section. The engineering geology and hydrogeology of the environment involved in the tunnel are disturbed, the stratum between the two structures is thin, and the technical measures cannot effectively strengthen the stratum, so the existing line is easily deformed during the construction process. [0003] In the prior art, when the soil layer between the tunnel and the existing line is grouted, the grouting cannot always flow to the required stratum position, so that the grouting effect of the soil layer is not good, and it is necessary to repeat ...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D11/10
CPCE21D9/008E21D9/001E21D11/10E21D11/107
Inventor 付春青李黎李旸王龙郭伟中付少贤林志达邓彩霞李金伟
Owner 北京住总集团有限责任公司