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Muddy water and air balance shield pressure control method and device

A pressure control, mud-water-gas technology, which is applied in the air pressure adjustment to realize the balance of shield excavation surface. Through the mud-water field, problems such as imbalance and difficult control of surface subsidence can be solved.

Active Publication Date: 2010-05-12
SHANGHAI TUNNEL ENG CO LTD +2
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Problems solved by technology

However, no matter which of the above methods is used, it will take a certain amount of time from the adjustment of the control pump (or valve) to the muddy water pressure reaching the set value. The earth pressure on the surface is unbalanced, and the subsidence of the surface is also difficult to control

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  • Muddy water and air balance shield pressure control method and device
  • Muddy water and air balance shield pressure control method and device

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0012] refer to figure 1 As shown, the pipeline connection diagram of the muddy water gas pressure regulating system of the present invention is shown. Wherein, a half partition 11 is vertically arranged in the shield muddy water bin 10, and the half partition 11 divides the shield muddy water bin 10 into a front muddy water bin 12 close to the side of the cutter head and a rear muddy water bin relatively far away from the cutter head. 13 two parts; the upper part of the front muddy water bin 12 and the rear muddy water bin 13 is separated by a half partition 11, and the lower parts of the two communicate with each other; the muddy water in the front muddy water bin 12 is completely filled, and the upper part of the rear muddy water bin 13 is injected Compressed air, its bottom is still full of muddy water, has thus formed air chamber 131 and ...

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Abstract

The invention discloses a method for realizing the balance of a shield excavated surface by regulating muddy water and air, comprising the following steps: a semi-clapboard is arranged in a muddy water bin to divide the muddy water bin into a front muddy water bin and a rear muddy water bin; the lower parts of the front muddy water bin and the rear muddy water bin are communicated; the muddy water is filled in the front muddy water, the compressed air is injected at the upper part of the rear muddy water; the muddy water height in the rear muddy water bin is monitored by a liquid level sensor; when fluctuating, the muddy water height is adjusted to a preset height by adjusting the rotation speed of a mud entering pump or a mud discharging pump; the pressure of the compressed air in the rear muddy water bin is monitored by an air pressure sensor while the muddy water height is fluctuated; and the pressure of the compressed air is kept at the preset value by adjusting an air inlet valve and an air exhaust valve, thus realizing the stability of the excavated surface in the process of the whole shield driving.

Description

technical field [0001] The invention relates to a method for realizing the balance of the excavation surface of the shield machine, in particular to a method for realizing the balance of the excavation surface of the shield machine through the adjustment of muddy water and air pressure. Background technique [0002] At present, the control method of the slurry system used in the slurry balance shield generally adopts the direct control type. The so-called direct control muddy water system is to input the muddy water under pressure from the muddy water adjustment tank on the ground into the muddy water tank of the shield machine through the muddy water pump. After the muddy water tank is mixed with the excavated mud and sand, thick mud is formed and transported to the ground muddy water treatment field by the mud discharge pump. The discharged muddy water is usually subjected to three-stage separation treatment such as a vibrating screen, a cyclone, a filter press or a centri...

Claims

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Application Information

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IPC IPC(8): E21D9/093
Inventor 王鹤林石元奇赵洁咏高国跃杨磊吕建中王伟钢庄欠伟
Owner SHANGHAI TUNNEL ENG CO LTD
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