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Reinforcing method for side-penetrating of a high-speed rail viaduct pile foundation by shield tunnel

A technology for shield tunnels and viaducts, which is used in tunnels, earth-moving drilling, mining equipment, etc., to achieve the effect of small soil disturbance and avoidance of impact.

Inactive Publication Date: 2021-01-15
CHINA RAILWAY FIRST GRP CO LTD +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of soil isolation and reinforcement between the shield tunnel and the pile foundation of the existing high-speed railway viaduct, this application provides a reinforcement method for the shield tunnel to pass through the pile foundation of the high-speed railway viaduct

Method used

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  • Reinforcing method for side-penetrating of a high-speed rail viaduct pile foundation by shield tunnel

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Embodiment Construction

[0033] The following is attached figure 1 The application is described in further detail.

[0034] The embodiment of the present application discloses a method for reinforcing a pile foundation of a shield tunnel passing sideways through a high-speed railway viaduct.

[0035] refer to figure 1 A method for reinforcing a pile foundation of a high-speed railway viaduct crossed by a shield tunnel sideways, comprising the following steps.

[0036] S1 pay-off positioning:

[0037] Determine the drilling area outside the protected area, then level the site, and then use the total station to measure the coordinate points of the two outermost points on both sides of each row, and then use these coordinate points to determine two For other drilling holes in the middle of the point, the hole distance on the ground is 30cm, and the hole position deviation is ≤1cm. After the hole location is determined, mark the hole location with paint.

[0038] S2 drilling rig in place and drilling:...

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Abstract

The invention relates to a reinforcing method for side-penetrating of a high-speed rail viaduct pile foundation by a shield tunnel. The reinforcing method comprises the following steps that S1, paying-off and positioning are carried out, and specifically, the hole positions of drill holes are determined outside a protection area and marked; S2, a drilling machine is in place and drills the holes,specifically, the drilling machine is in place outside the protection area, a drill rod drills the holes by adopting an oblique accurate positioning mode to enable the drill holes to extend to an areato be reinforced, different inclination angles are adopted for the drill holes to form a sector shape between the drill holes and the area to be reinforced, and meanwhile a grouting pipe and a sleevevalve pipe are installed; S3, grouting is carried out, specifically, after a soil body is recovered, grouting is carried out by adopting a single-hole grouting mode, and after a second peak value appears on a pressure gauge, grouting is ended; and S4, hole sealing is carried out, specifically, hole openings are sealed after grouting is ended, and then the next hole operation is carried out. The reinforcing method has the effect of solving the problem of soil body isolation and reinforcement operation between a shield tunnel and an existing high-speed rail viaduct pile foundation.

Description

technical field [0001] The present application relates to the field of tunnel construction, in particular to a reinforcement method for a pile foundation of a shield tunnel passing through a high-speed railway viaduct sideways. Background technique [0002] In the process of shield tunnel construction, it is inevitable to encounter the situation that the pile foundation of the existing high-speed railway viaduct is passed under. The soil between the pile foundation and the tunnel is isolated and reinforced. [0003] In view of the related technologies mentioned above, the inventor found that the working surface is generally located in the high-speed rail protection zone, which does not have the reinforcement operation conditions, so that the reinforcement operation cannot be completed, so that the safety of the existing high-speed rail pile foundation cannot be guaranteed. Contents of the invention [0004] In order to solve the problem of soil isolation and reinforcement...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/06
CPCE21D9/001E21D9/0671
Inventor 张子洋姚锐张煜李连和邓文涛肖云鹏
Owner CHINA RAILWAY FIRST GRP CO LTD
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