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Construction method for rapid escape of cutter head in permafrost at the initial stage of shield tunneling

A construction method and cutter head technology, which is applied to earthwork drilling, mining equipment, tunnels, etc., can solve the problems of long time consumption, low success rate, and high risk of equipment damage, and achieve the effect of strong process pertinence and reasonable parameters

Active Publication Date: 2017-03-01
SHANGHAI GREENLAND CONSTR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of low success rate, long time-consuming, and high risk of equipment damage in the existing method of escaping the cutter head in the permafrost at the initial stage.

Method used

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  • Construction method for rapid escape of cutter head in permafrost at the initial stage of shield tunneling
  • Construction method for rapid escape of cutter head in permafrost at the initial stage of shield tunneling
  • Construction method for rapid escape of cutter head in permafrost at the initial stage of shield tunneling

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Embodiment Construction

[0045] The invention provides a construction method for quick escape of a cutterhead in the initial stage of shield tunneling, and is especially suitable for quick escape of a cutterhead in frozen soil. In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.

[0046] figure 1 It is a construction flowchart of the present invention, including four steps of preparatory work, shield tail retreating work, cutterhead escape work, and follow-up work. Among them, the preparatory work includes the following processes: longitudinal support of the base, horizontal support of the base, and anti-rotation device; the process of retreating the shield tail includes: separating the propulsion cylinder from the segment, fully extending the hinged cylinder until the shield tail retreats, The tail shell is welded to the base; the cutterhead release work includes the following processes: fully retract the hinged ...

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Abstract

The invention provides a construction method for quickly getting a cutterhead out of frozen earth in a shield launching stage. The construction method comprises the following steps of firstly arranging a base longitudinal support, a base lateral support and an anti-rotation device; then separating a propulsion cylinder from a duct piece, so that an articulation cylinder is fully stretched to a shield tail to retreat; welding a shield tail shell and a base; fully shrinking the articulation cylinder and pushing the cylinder to withstand the duct piece; starting the cutterhead; after the cutterhead is rotated, separating a shield shell from the base; finally, continuously launching a shield machine. The method provided by the invention overcomes the defects of the prior art, the cutterhead can be quickly gotten out of the frozen earth in the shield launching stage, and the method has the characteristics of programmed operation, strong technology pertinence, reasonable parameters, high efficiency and quickness, safety and reliability.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering construction by shield tunneling method, in particular to a construction method for rapid escape of a shield machine cutter head in permafrost at the initial stage. Background technique [0002] The initial stage refers to a series of operations in which the shield machine penetrates into the strata of the portal according to the design elevation and slope and advances until the shield machine completely enters the soil. In the case of poor self-supporting soil, a certain thickness of soil within the opening range must be reinforced before the shield tunnel starts. Compared with grouting, deep mixing piles, rotary jetting piles, precipitation and other construction methods, the brine freezing method has the advantages of small reinforcement thickness, good uniformity, good water insulation, low pollution, and small construction equipment occupation, etc., especially suitable for constru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/08
CPCE21D9/08
Inventor 徐征杰
Owner SHANGHAI GREENLAND CONSTR GRP
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