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Shield receiving method

A receiving method and shield tunneling technology, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc., can solve problems such as worker injury, cutter head trapped, shield stagnation, etc., so as to reduce the damage rate of the cutter and avoid going out of the warehouse and tool change, the effect of construction process safety

Pending Publication Date: 2021-09-03
ZHONGTIAN CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, when the shield passes through the ordinary steel bar ground connection wall, it may cause damage to the cutter and the stagnation of the cutter head, causing the shield to stagnate. If this happens below the existing operation line, it is very safe to open the warehouse to clean up or change the cutter. Hidden danger, easy to cause bodily injury to staff

Method used

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Embodiment

[0060] Please refer to Figure 1 to Figure 5 , which shows that this embodiment provides a shield receiving method, which includes the following steps:

[0061] S1. Geological survey steps:

[0062] Survey the geological situation between the existing operation line and the cross-transfer station: the main strata that the shield machine passes through are: sandy silt, silt mixed with sandy silt, silty silt, clay mixed with silt, and clay.

[0063] Survey the surrounding environment of the station ground: the ground above the position where the shield machine crosses the first ground connection wall and the second ground connection wall of the existing operation line is open and does not affect buildings, and the pedestrian and traffic flow is large.

[0064] To survey the general situation of the station project, a transfer node foundation pit is added between the existing operation line and the cross transfer station. The main body is a special-shaped foundation pit. Underg...

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Abstract

The invention provides a shield receiving method, and relates to the technical field of shield construction. The shield receiving method comprises the following steps of determining a propulsion route; conducting a first reinforcing step, specifically, grouting and reinforcing a construction section from a shield receiving end of a cross transfer station to a second side underground diaphragm wall of the existing operation line of the station by using a pipe shed grouting method and a WSS construction method; conducting a first breaking step, specifically, breaking the underground diaphragm wall of the shield receiving end of the cross transfer station, so that interlayer soil between the underground diaphragm wall of the shield receiving end of the cross transfer station and the second side underground diaphragm wall is exposed; constructing a shield receiving box; carrying out underground excavation and supporting, excavating interlayer soil through a CRD construction method, and forming an excavation channel; conducting a second reinforcing step, wherein the two sides of the second side underground diaphragm wall are subjected to grouting reinforcement through the WSS construction method to form reinforcing layers; conducting a second breaking step, specifically, breaking a second side underground diaphragm wall steel bar and a cross-shaped steel plate; conducting a backfilling step, specifically, backfilling and closing the excavated tunnel; and conducting a receiving step, specifically, finishing shield receiving when a shield machine arrives the shield position. The method has the beneficial effects of reducing the damage rate of the cutter and being safer in construction.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a shield receiving method. Background technique [0002] The shield method is a fully mechanized construction method in the underground excavation method. It propels the shield machine in the ground, and supports the surrounding rock through the shield casing and segments to prevent collapse into the tunnel. At the same time, a cutting device is used to excavate the soil in front of the excavation face, transported out of the hole by excavation machinery, jacked in the rear by a jack, and assembled with prefabricated concrete segments to form a mechanized construction method of the tunnel structure. [0003] In the prior art, when the shield passes through the ordinary steel bar ground connection wall, it may cause damage to the cutter and the stagnation of the cutter head, causing the shield to stagnate. If this happens below the existing operation line, it is very saf...

Claims

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Application Information

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IPC IPC(8): E21D9/087E21D11/10E21F17/00
CPCE21D9/087E21D9/0873E21D11/10E21F17/00
Inventor 刘映晶王幸福潘定科冯超其吴锋陈锡阳朱汉华
Owner ZHONGTIAN CONSTR GROUP
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