Device for preventing negative ring duct piece from floating upwards in steel sleeve

Abstract

The invention provides a device for preventing a negative ring duct piece from floating upwards in a steel sleeve. The device comprises a negative ring duct piece in the steel sleeve; a plurality of compression bags are arranged between the steel sleeve and the negative ring duct piece; the plurality of compression bags are uniformly arranged on the top of the inner wall of the steel sleeve; filling pipes are arranged on the two sides of the compression bags; the filling pipes penetrate through fixing hole seats on the steel sleeve and are hermetically connected and fixed through three-way pipes; a pressure one-way valve is fixedly arranged at one end of each three-way pipe, and a pressure gauge is fixedly arranged at the other end of each three-way pipe; the compression bags are filled with filling materials through the pressure one-way valves, so that the multiple compression bags are expanded to fill the top gap between the steel sleeve and the negative ring duct piece, and the situation that the negative ring duct piece floats upwards due to buoyancy generated when grout is used for pouring the gap between the steel sleeve and the negative ring duct piece is avoided; and the compression bags can be filled with air, water or inert slurry according to the buoyancy pressure change, so that the position of the negative ring duct piece can be better controlled, the axis of the negative ring duct piece is ensured to be centered, the posture of a shield tunneling machine is better controlled, normal operation of operation is ensured, and the device is suitable for being popularized and used.

Description

technical field [0001] The invention relates to the field of shield tunnel engineering technology, in particular to a device in a steel sleeve for preventing negative ring segments from floating up. Background technique [0002] At present, the steel sleeve scheme is more and more widely used in domestic rail transit engineering projects. The so-called starting and receiving of the steel sleeve means that the steel sleeve is installed in the working well in advance before the shield machine goes into the well or exits the hole, so that the shield machine forms a closed space inside the steel sleeve, and then forms a closed space. Afterwards, it is filled with objects, and the water and soil pressure on the tunnel face is provided for the shield machine through this confined space, so as to realize the safe starting and receiving of the shield machine. [0003] The use of steel sleeves has certain limitations: when the assembled negative ring comes out of the tail of the shi...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a device for preventing the floating of the negative ring segment in the steel sleeve, so as to solve the problem that the floating of the negative ring segment in the steel sleeve is difficult to control

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