Air cushion type double-mold slurry shield machine and control method thereof

Abstract

The invention discloses an air cushion type double-mold slurry shield machine and a control method thereof. An air cushion bin of the air cushion type double-mold slurry shield machine is an annular cavity consisting of a front shield and a cutter head driving device; an air cushion communicating pipe is arranged in the air cushion bin; an upper port of the air cushion communicating pipe extends into a high-pressure air cavity, and a lower port of the air cushion communicating pipe extends into a slurry cavity; the upper port of the air cushion communicating pipe is connected with a drainage pipe leaded to the slurry bin; a hydraulic gate valve is arranged between the air cushion communicating pipe and the drainage pipe; and the hydraulic gate valve is connected with a control device at the external of the shield machine. The air cushion type double-mold slurry shield machine can realize a slurry bin pulp discharge tunneling mode and an air cushion bin pulp discharge tunneling mode, can precisely control the pressure of a support surface under the two modes to prevent the pressure fluctuation in the support surface, solves the impact problem to a slurry circulating system of the shield machine, and meanwhile, prevents the earth surface sedimentation.

Description

technical field [0001] The invention relates to the field of mud-water shield machines, in particular to an air-cushion double-mode mud-water shield machine and a control method thereof. Background technique [0002] The conventional air-cushion mud-water shield machine has unique advantages such as high working pressure and precise pressure control of the support surface, so it is widely used in the construction of tunnels crossing rivers and seas. During the excavation of a large number of crushed stone strata, there are often phenomena such as mud cake formation on the cutter head, stagnant discharge of muddy water bins and air cushion bins, which lead to problems such as low excavation speed and low construction efficiency, which seriously affect the normal operation of the muddy water shield machine; the conventional single bin The mud-water shield machine has the advantages of low mud cake probability and high muck transportation efficiency. It is used in tunnel constr...

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Problems solved by technology

[0005] The present invention aims to solve the problem that the muddy water circulation system of the existing muddy water circulation system and the control method fluctuate greatly, and the larger stones cannot be handled, which easily cause impact on the muddy water circulation system of the shield machine, and easily lead to serious subsidence of the ground surface, and Disclosed is an air cushion type double-mode slurry shield machine and its control method

The air cushion connecting pipe leading to the mud water tank is set in the air cushion tank, no matter whether the slurry discharge excavation mode of the mud water tank or the air cushion tank discharge excavation mode is used, it can provide accurate control pressure for the support surface and avoid pressure in the support surface Fluctuation, which solves the problem of impact on the mud-water circulation system of the shield machine, and also avoids the settlement of the ground surface

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