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Open caisson reinforcing method suitable for shield construction

A kind of caisson and shield technology, which is used in infrastructure engineering, earthwork drilling, soil protection and other directions, can solve problems such as bad social impact, soil disturbance, collapse, etc., to ensure safety, suppress settlement, and reduce deformation. effect of stress

Pending Publication Date: 2022-02-15
CCCC TUNNEL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, building deep and large foundation pits in highly permeable and water-rich strata has certain risks. Wells and surface buildings have cracks or even collapsed due to uneven settlement of the foundation. In recent years, in the construction of municipal and subway projects, similar accidents have occurred, resulting in the loss of people's lives and property, and the social impact is very bad.

Method used

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  • Open caisson reinforcing method suitable for shield construction
  • Open caisson reinforcing method suitable for shield construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Such as figure 1 As shown, the reinforced pipe shed structure of this embodiment is used for the reinforcement treatment of the pump room B with a depth of about 10m. The specific reinforced pipe shed structure is obliquely inserted from the ground or the circumferential side of the caisson foundation to the bottom of the caisson J.

[0062] The reinforced pipe shed structure includes a plurality of grouting pipes 1, wherein the plurality of grouting pipes 1 are divided into three rows, and each row of grouting pipes 1 is distributed at intervals along the corresponding side of the caisson J, and constitutes the grouting pipes of each row 1 are arranged in parallel, and two adjacent rows of grouting pipes 1 are arranged apart from each other.

[0063] In this example, the gaps are distributed between every two adjacent rows of grouting pipes 1 , and the vertical distances between the tube cores of every adjacent row of grouting pipes 1 are equal. It is convenient for ...

Embodiment 2

[0114] Such as figure 2 As shown, the reinforced pipe shed structure of this embodiment is used for the reinforcement treatment of the water absorption well X with a depth of 15m.

[0115] Specifically, the reinforced pipe shed structure adopted is basically the same as the reinforced pipe shed structure in Implementation 1, with the difference.

[0116] L1=26.2m, L2=26.5m, L3=25.6m.

[0117] The angle formed by the first grouting pipe row Z1 and the ground is 75°, the angle formed by the second grouting pipe row Z2 and the ground is 72°, and the angle formed by the third grouting pipe row Z3 and the ground is 70°.

[0118] The depth of the reinforcement zone Q is H, the vertical distance from the grouting inlet end of the third grouting pipe row Z3 to the caisson J is L, H=8m, L=7.5m.

[0119] In addition, there are also differences in the implementation, that is, in the depth of the drilled hole to meet the lower pipe of the steel pipe and the sleeve valve pipe.

[0120] T...

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Abstract

The invention relates to an open caisson reinforcing method suitable for shield construction. The open caisson reinforcing method at least comprises the following steps that S1, a grouting reinforcing foundation is formed; and S2, a grouting reinforcement body is formed. On one hand, the grouting slurry and the steel pipes are solidified to form a whole, the ground load and the soil layer weight of the upper portion are borne, deformation of the open caisson is reduced, and the safety of the open caisson during tunneling construction is effectively guaranteed; and on the other hand, grouting can be conducted on the reinforcing area many times through the sleeve valve pipe, a grouting reinforcing body is formed, and therefore settlement of the foundation is restrained.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a caisson reinforcement method suitable for shield construction. Background technique [0002] As everyone knows, a tunnel is a building built underground, underwater or in a mountain, and laying a railway or building a road for the passage of motor vehicles. The construction process of the tunnel mainly includes tunnel planning, survey, design, penetration control measurement and construction, so whether it is construction or use, the tunnel forming process is cumbersome and complicated. [0003] At present, with the continuous improvement of construction technology, construction level and construction requirements, more and more new technologies, new processes and new construction methods are applied to the construction of underground projects, and the related highlights, difficulties and special projects are also becoming more and more complex. more and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E02D3/12E02D15/02E02D27/32
CPCE21D9/001E21D9/002E02D3/12E02D15/02E02D27/32E02D2250/003
Inventor 王义盛赵小鹏徐文礼刘凯蔡运东李艳东孙钰斌柴坤石国庆
Owner CCCC TUNNEL ENG
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