Anti-uplift retreating deep hole grouting system and method for crossing existing shield tunnels

A shield tunneling and retreating technology, applied in the direction of tunnels, earthwork drilling, mining equipment, etc., can solve the problem of easy uplift of soil and achieve the effect of easy operation.

Active Publication Date: 2018-02-09
CHINA RAILWAY 19TH BUREAU GRP RAIL TRANSIT ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides an anti-uplift retreating deep hole grouting system and method for crossing the existing shield tunnel, which solves the problem that the upper soil of the tunnel excavated by the mining method is easy to uplift when passing through the existing structure

Method used

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  • Anti-uplift retreating deep hole grouting system and method for crossing existing shield tunnels
  • Anti-uplift retreating deep hole grouting system and method for crossing existing shield tunnels
  • Anti-uplift retreating deep hole grouting system and method for crossing existing shield tunnels

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Embodiment Construction

[0023] The present invention is described in detail below in conjunction with accompanying drawing:

[0024] An anti-uplift retreating deep hole grouting system for crossing an existing shield tunnel, comprising an existing shield tunnel 1, under which a pre-excavated underground excavation section tunnel is arranged. 3. At the left end of the section tunnel 3 under the pre-excavated mine method underground excavation, the excavated section civil air defense section tunnel 4 is arranged, and the pre-excavated mine method underground tunnel 4 in the excavated section civil air defense section tunnel 4 is arranged. The upper guide hole face 15 of the section tunnel 3 dug down is densely covered with deep hole grouting holes 16, and the distance between adjacent deep hole grouting holes 16 is 20-30 cm. The drill pipe and the grouting casing of the retreating deep hole grouting machine are set, the grouting pressure of the retreating deep hole grouting machine is 1-1.5 MPa, and th...

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Abstract

The invention discloses a heaving-prevention retrusive deep-hole grouting system and method for passing through an existing shield tunnel. The problem that soil above a mining method excavation section tunnel is likely to heave when an existing structure is passed underneath is solved. The heaving-prevention retrusive deep-hole grouting system is characterized in that a pre-excavation mining method underground excavation underneath passing section interval tunnel (3) is arranged below the existing shield tunnel (1), an excavated section civil air defense section tunnel (4) is arranged at the left end of the pre-excavation mining method underground excavation underneath passing section interval tunnel (3), deep-hole grouting holes (16) are densely distributed on an upper pilot tunnel excavating face (15) of the pre-excavation mining method underground excavation underneath passing section interval tunnel (3) in the excavated section civil air defense section tunnel (4), a drill rod and a grouting casing pipe of a retrusive deep-hole grouting machine are arranged in each deep-hole grouting hole (16), the grouting pressure of the retrusive deep-hole grouting machine is 1-1.5 MPa, and grouting fluid in the retrusive deep-hole grouting machine is modified water glass. On-site existing equipment is utilized, and it is ensured that the existing shield tunnel does not heave.

Description

technical field [0001] The present invention relates to a system and method for performing retreating deep hole grouting on the soil above the excavated tunnel when the mining method is used to excavate the subway tunnel, in particular to a method for excavating the subway tunnel by the mining method near the excavation section. There is an existing shield tunnel above the distance, and when the new tunnel is excavated, the system and method of retreating deep hole grouting for controlling and compensating the settlement of the existing structure in pipe curtain construction. Background technique [0002] In the construction of urban subways, there are more and more cases of passing through existing line tunnels at close range. When the existing line is a shield tunnel, since the structure of the shield tunnel is composed of flexible segments, and the segments are connected by high-strength bolts, when the soil below the shield tunnel is disturbed, the Segments will produce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06
CPCE21D9/0607
Inventor 赵辉王江华王云龙罗文江王汉霆李建
Owner CHINA RAILWAY 19TH BUREAU GRP RAIL TRANSIT ENG
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