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Device for disturbance of soil at back of shield tunnel

A shield tunnel and backside technology, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve problems such as difficult construction, affecting engineering safety, subway operation safety, cracking of shield segments, etc., and achieve good economic benefits and social benefits. effect of benefit

Active Publication Date: 2016-08-17
POWERCHINA HUADONG ENG COPORATION LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Shield tunnels are widely used in underground projects such as urban municipal administration and transportation. During construction and operation, affected by geological conditions, construction factors and changes in the surrounding environment, shield tunnels will produce horizontal "duck egg" deformation and longitudinal unevenness. Subsidence or uneven horizontal displacement and other problems, resulting in shield segment cracking, shield tunnel water leakage and other diseases, these are hidden dangers to the structural safety of the shield tunnel and the safe operation of the subway, if not treated in time, it will seriously affect the project Safety and subway operation safety
In order to solve such problems, grouting reinforcement to the soil or steel ring reinforcement on the inner side of the shield tunnel is often used. The former will have a more adverse effect on the stress of the shield tunnel structure, while the latter is difficult and expensive to construct.

Method used

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  • Device for disturbance of soil at back of shield tunnel
  • Device for disturbance of soil at back of shield tunnel
  • Device for disturbance of soil at back of shield tunnel

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Embodiment Construction

[0017] In this embodiment, the device for disturbing the soil at the back of the shield tunnel consists of accessories I and II connected by three bolts with an included angle of 120° to form a cylindrical whole.

[0018] Such as figure 1 , figure 2 As shown, fitting I is a short circular tube body 1-1, the outer diameter of fitting I is 70-110mm, the inner diameter is not less than 40mm, and the wall thickness is not less than 15mm. There is a water channel 3 on the end face of the matching end of the short circular pipe body 1-1. The water channel 3 is a circular groove with a depth of 1 mm. There are 8 water spray ports with a diameter of not less than 10 mm on the pipe wall outside the water channel. 2. The nozzle and the radial direction form an angle of about 60°. There are three bolt holes 4-1 at the bottom of the water channel 3 for connecting with the fitting II, and the angles between the three bolt holes are 120°.

[0019] Such as image 3 , 4 , 5, fitting II ...

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Abstract

The invention relates to a device for disturbance of soil at the back of a shield tunnel and aims to generate rotating water flow via the device by use of high-pressure water to cut soil and enable soil and water to be discharged from a central hole of the device by use of the soil and water pressure difference between the inside and the outside of soil after disturbance. Besides the capability of soil and water scooping and discharging, the device can perform grouting reinforcement on disturbed soil by use of an external measuring system. The technical scheme is that the device for disturbance of soil at the back of the shield tunnel is characterized in that the device is formed by connecting an accessory I and an accessory II via three bolts with equal included angles, and soil-water scooping and discharging holes with the same diameter are formed in the centers of the accessory I and the accessory II and are through in the axial direction. The device is suitable for correction of the deformed shield tunnel and rectification of the shield tunnel subjected to differential settlement or horizontal displacement.

Description

technical field [0001] The invention relates to a device for disturbing the soil on the back side of a shield tunnel. It is suitable for correction after deformation of shield tunnel and correction after uneven settlement or horizontal displacement of shield tunnel. Background technique [0002] Shield tunnels are widely used in underground projects such as urban municipal administration and transportation. During construction and operation, affected by geological conditions, construction factors and changes in the surrounding environment, shield tunnels will produce horizontal "duck egg" deformation and longitudinal unevenness. Subsidence or uneven horizontal displacement and other problems, resulting in shield segment cracking, shield tunnel water leakage and other diseases, these are hidden dangers to the structural safety of the shield tunnel and the safe operation of the subway, if not treated in time, it will seriously affect the project Safety and subway operation sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F5/32E02D15/02
CPCE02D15/02E02D2250/003E02F5/32E21D9/001E21D9/1066E21D9/01E21C45/00E21D11/003
Inventor 陈文华侯靖张捷戴杨春崔科伟
Owner POWERCHINA HUADONG ENG COPORATION LTD
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