Replacement-facilitating tail brush and method for replacing tail brush without reinforcement in long distance

Abstract

The invention provides a replacement-facilitating tail brush and a method for replacing a tail brush without reinforcement in a long distance. The tail brush is an annular tail brush formed by splicing a plurality of tail brush components, wherein each tail brush component comprises at least three parallel arc-shaped tail brush mounting ring plates and a sliding rod for connecting the at least three tail brush mounting ring plates. During installation of the invention, a new tail brush is mounted on the outer ring surface of a steel structure duct piece through a spring-bolt adjustment structure for splicing together with the steel structure duct piece; then, in a tunneling process, an original tail brush is removed at first through a removal opening on the steel structure duct piece; andin the tunneling process, the new tail brush is moved to a tail brush mounting position, and then is mounted in place through a mounting opening on the steel structure duct piece. The invention realizes replacement of tail brushes in the shield tunneling process; and furthermore, in the tail brush replacement process, no ground reinforcement measure needs to be taken, so that the construction difficulty is lowered, the construction period is shortened, and the economical cost is reduced.

Description

technical field [0001] The invention belongs to the field of shield tunneling, in particular to a conveniently replaceable shield tail brush and a method for replacing the shield tail brush under long-distance non-reinforcement working conditions. Background technique [0002] With the large-scale development of domestic subway construction, the shield construction method has been widely used in the construction of underground excavation rooms in subway areas due to its safety, speed, and wide adaptability. The shield tail brush of the shield machine is located at the tail of the shield main body. It is generally formed by bending the steel wire and fluffing it. It can be in close contact with the segment and mainly prevents water, mud, etc. from flowing into the shield along the back of the segment. The sealing function is a key sealing facility to prevent sand and mud gushing at the tail of the shield. The 3 sealing brushes of the shield tail brush form 2 sealing chambers...

AI Technical Summary

Problems solved by technology

Existing reinforcement measures mainly include freezing the strata around the shield tail or using waterproof materials to grout the stratum at the shield tail to prevent seepage. When the ground conditions are complex, the project is more difficult, and there are even many special grounds that do not have the conditions for reinforcement

Moreover, since the shield tail brush on the existing shield machine is directly welded to the inner side of the shield shell tail, when replacing the shield machine, it is necessary to plan off all the old shield tail brushes, and then weld a new shield tail brush

Due to the relatively small space in the tunnel, it is very inconvenient to plan and replace the brushes, and there are safety hazards in welding in the tunnel. During the replacement process, the removal of the old shield tail brush and the installation of the new shield tail brush are complicated, time-consuming, laborious, and inefficient.

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