Mud discharging structure for medium and small type earth pressure balance shield machine and construction method

Abstract

The invention relates to a mud discharging structure for a medium and small type earth pressure balance shield machine. The mud discharging structure comprises a screw machine, a transfer mud discharging box, a mud discharging pipe and a vacuum generating device; the screw machine is arranged in a shield body of the shield machine, the transfer mud discharging box is arranged in a slag dischargingport of the screw machine, the transfer mud discharging box is connected to the vacuum generating device through a mud discharging pipe, the transfer mud discharging box includes a stirring device and at least one soil modification agent addition port, and the transfer mud discharging box is used for stirring and improving soil discharged by the screw machine to the transfer mud discharging box to the flow-formed state, and the vacuum generating device extracts the improved flow-formed slag soil through the mud discharging pipe. According to the mud discharging structure, the transfer mud discharging box with a stirring and slag soil improving system is arranged, slag soil can be subjected to secondary stirring, and the requirement for cutter head and soil tank slag soil improvement is reduced.

Description

technical field [0001] The invention relates to the field of shield machines, in particular to a mud discharge structure and construction method for small and medium-sized earth pressure balance shield machines. Background technique [0002] At present, the main mud discharge method of the shield machine on the market is that the earth pressure shield adopts the screw conveyor + belt conveyor conveying method, and the mud water shield adopts a large-flow mud pump to pump. In the small and medium shield tunnels, the above mud discharge methods all have certain limitations. Defects. [0003] When the earth pressure shield is conveyed by screw conveyor + belt conveyor, due to the limitation of the tunnel section, the turnout cannot be arranged inside the tunnel, and the efficiency is extremely low during long-distance transportation, and this construction method requires a large size in the longitudinal direction of the launch shaft. , the construction cost of the originating ...

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Problems solved by technology

[0005] The invention provides a mud discharge structure and construction method for small and medium-sized earth pressure balance shield machines, which solves the problems that the existing shield machine mud discharge structures cannot be used for long-distance transportation and the muddy water treatment system is complicated.

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