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Earth pressure shield external air bag combined mud pressure balancing method

A mud and pressure technology, which is applied in the field of pressure balance in the soil silo, can solve problems such as the inability to prevent the pressure of the earth silo from rising suddenly, the pressure in the silo to drop suddenly, and the pressure balance and stability that cannot be removed, so as to avoid the risk of ground subsidence , Promote construction quality, improve the effect of grouting effect

Active Publication Date: 2021-04-16
GUANGZHOU RAIL TRANSIT CONSTR SUPERVISION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this measure cannot prevent the sudden rise in the pressure of the soil silo, nor can it unload the sudden rise in the pressure in the soil silo in time to stabilize the pressure balance. Sudden drop in pressure in the warehouse

Method used

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  • Earth pressure shield external air bag combined mud pressure balancing method

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that the present embodiment takes the technical solution as the premise, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the present invention. Example.

[0040] This embodiment provides a pressure balancing method for an earth pressure shield external air bag combined with mud, specifically:

[0041] like figure 1 As shown in the figure, a pressure vessel Y is placed near the shield body, and its shape is suitable to make full use of the space of the storage location and to withstand the high pressure inside; The space above is an air pocket made up of air. The bottom of the pressure vessel Y is the sediment storage area, which is used to store the sediment deposited by the mud; the pressure vessel Y is provided with the highest liquid level line and ...

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Abstract

The invention discloses an earth pressure shield external air bag combined mud pressure balancing method. The earth pressure shield external air bag combined mud pressure balancing method comprises the steps that a mud pressure bin with an air bag or a combination of a plurality of air bags is connected with the top of a shield soil bin through a pipeline, in the shield tunneling process, the pipeline is unblocked all the time, the high compressibility or elasticity of the air bags is utilized, and mud is used as a transmission medium to keep in contact with the soil pressure in the soil bin to form a stable balance mode. By means of the mode, the conditions of ultrahigh pressure (the ultrahigh pressure can cause ground upheaval, slag outlet or shield tail spewing and shield tail sealing breakdown) or ultralow pressure (the ultralow pressure can cause stratum collapse and ground collapse) in the soil bin can be eliminated, the pressure of the soil bin is stabilized within a reasonable range, and micro-disturbance tunneling of the stratum around the tunnel is achieved.

Description

technical field [0001] The invention relates to the field of earth pressure shield construction, in particular to a method for achieving pressure balance in an earth bunker by combining an earth pressure shield external airbag with mud pressure. Background technique [0002] When the earth pressure balance shield is excavated in the water-rich sand layer and other highly permeable strata, the soil silo is filled with soil slag and mud. The compression ratio of these materials is very small. The pressure is easy to rise suddenly, causing the ground bulge and the gushing phenomenon when the slag is discharged. When the high pressure in the soil bin is transmitted to the shield tail, it is easy to break down the shield tail brush and the hinge seal, causing the shield tail gushing. When the gushing occurs, it will cause the pressure in the warehouse to drop suddenly. In this state of pressure loss, the sand layer above the front of the cutter head or above the shield tail is ea...

Claims

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Application Information

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IPC IPC(8): E21D9/08E21D9/12E21D11/10
Inventor 陶芳良刘典基竺维彬陈乔松黄威然王俊彬区穗辉梁建波
Owner GUANGZHOU RAIL TRANSIT CONSTR SUPERVISION CO LTD
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