Earth pressure balance shield structure with gate anti-spewing structure and shield method

Abstract

The invention discloses an earth pressure balance shield structure with a gate anti-spewing structure and a shield method. The structure comprises a cutterhead, a front shield, a main drive, a middleshield, a shield tail, a thrust cylinder and a spiral conveyor, wherein the thrust cylinder is propped against the front end surface of a tube piece; a soil cabin is arranged at the back of the cutterhead; the main drive is arranged at the back of the soil cabin; an opening is formed in the lower part of the soil cabin; a rotating shaft of the spiral conveyor is arranged at the lower part of the soil cabin; the spiral conveyor is arranged in an inclined manner; a slag falling opening of the spiral conveyor is provided with an upper gate mechanism and a lower gate mechanism; residue soil fallsonto a belt of a belt machine system through the upper gate mechanism and the lower gate mechanism; the upper gate mechanism is provided with an upper gate plate, a first slag falling opening and an anti-spewing slag falling opening; and the lower gate mechanism is provided with a lower gate plate and a second slag falling opening. The dilute slag passing area is small, the residue soil spewing amount is small, and the belt in operation can be effectively conveyed. The anti-spewing structure of an earth pressure balance spiral conveyor gate solves the spewing problem more directly and effectively, and has large popularization prospect.

Description

technical field [0001] The invention relates to slag discharge by an earth pressure balance shield screw conveyor, in particular to an earth pressure balance shield structure and a shield method with a gate gushing-proof structure. Background technique [0002] Today's shield construction mainly adopts earth pressure balance shield and mud-water balance shield. Earth pressure balance shield has many advantages in shield construction, especially in urban rail transit, due to its small footprint, low construction cost, and fast construction progress. The number of shield tunnels has an absolute advantage in construction. [0003] Due to various reasons, the construction of earth pressure balance shield sometimes causes the output of muck to be relatively thin, and the muck is in a fluid state. As long as the gate is opened for a few centimeters, a large amount of muck will gushes out. Due to related restrictions such as the design of the shield machine, the belt where the out...

AI Technical Summary

Problems solved by technology

[0004] When the shield gushing phenomenon occurs, the shield driver will always perform frequent operations of opening or closing the gate. It is difficult to control the opening distance of the gate. When the gate is opened wide, it will spew, and when it is opened small, no slag will come out, causing the slag to scatter into the tunnel

It takes a long time to clean up the muck that has fallen into the tunnel, and it often gushes out to cause the excavation of the shield tunnel. It takes one day to clean the tunnel, which causes the shield construction to stop and stop, which seriously affects the progress of the shield tunneling and increases the construction cost.

It is necessary to find out the real cause of the spewing and slag during shield tunneling construction and take effective measures to avoid it, and solve the problem of slow construction progress due to shield tunneling spewing

Images