A pressure balance method of earth pressure shield with external airbag combined with mud

A mud and pressure technology, applied in the field of pressure balance in the soil bin, can solve the problems of unavoidable pressure drop in the bin, unable to prevent the sudden rise of the soil bin pressure, unable to remove the pressure balance and stability, etc., to avoid ground collapse, promote Construction quality and the effect of improving the grouting effect

Active Publication Date: 2022-06-21
GUANGZHOU RAIL TRANSIT CONSTR SUPERVISION CO LTD
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  • Claims
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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

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  • A pressure balance method of earth pressure shield with external airbag combined with mud

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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 a pressure balance method of combining mud with an external airbag of an earth pressure shield. A mud pressure chamber with one airbag or a combination of multiple airbags is used to connect the top of the shield earth chamber through a pipeline. During the excavation process of the shield machine, the pipeline keeps Unimpeded, using the high compressibility or elasticity of the airbag, using mud as the transmission medium, and keeping in touch with the earth pressure in the soil silo to form a stable balance mode. This mode can eliminate ultra-high pressure (such ultra-high pressure will cause ground uplift, slag outlet or shield tail gushing, and shield tail seal breakdown) or ultra-low pressure (such ultra-low pressure will cause stratum collapse and ground collapse) in the soil bin. The condition of the soil bunker is stabilized within a reasonable range, and the micro-disturbance excavation of the stratum around the tunnel is realized.

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 bin 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 easy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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