Shield supporting mud air pressure bin opening, pressure maintaining and wall protecting construction method

Abstract

The invention discloses a shield supporting mud air pressure bin opening, pressure maintaining and wall protecting construction method. The method involves a shield tunneling machine body; a tunneling head is arranged on one side of the shield tunneling machine body; a stirring box is arranged in the shield tunneling machine body; a first motor is arranged at the top of the inner wall of the stirring box; an output shaft of the first motor is connected with a straight shaft; a plurality of first sliding grooves are formed in the two sides of the straight shaft correspondingly; first sliding blocks are slidably connected inside the first sliding grooves; first springs are arranged between the first sliding blocks and the inner walls of the first sliding grooves; stirring rods are arranged on the two sides of the straight shaft correspondingly; and reset springs are arranged between the stirring rods and the first sliding blocks. According to the invention, the output shaft of the first motor drives the straight shaft to rotate for driving the stirring rods to rotate, and the stirring rods swing within a certain angle under the resistance of crushed materials and the action of the reset springs to stir and mix the crushed materials and plasticizer liquid, so that a movement track is effectively improved, and the overall mixing efficiency is effectively improved.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a construction method for supporting mud gas pressure opening and maintaining pressure protection walls for shield tunneling. Background technique [0002] The earth pressure shield method is the mainstream method of urban tunnel construction. During the shield tunneling construction, tools are used to cut rock and soil. Therefore, construction personnel need to enter the soil warehouse to replace worn tools. Due to factors such as buildings on the ground and poor self-stability of the stratum, it is often necessary to enter the warehouse under pressure. The principle of air pressure entering the warehouse is: use the compressed air generated by the air compressor to inject the soil into the soil chamber to replace the earth pressure, and establish a reasonable air pressure in the soil chamber. To balance the water and soil pressure in front of the cutter head, to stab...

AI Technical Summary

Problems solved by technology

[0003] During the excavation process, the shield machine drives the excavation head to rotate, breaks rocks, etc., and transports the crushed stones to the rear through the transmission mechanism, and lays the supporting segment of the tunnel while excavating, using clay slurry as A liquid 1. The plasticizer is used as liquid B, and liquid A and liquid B are mixed and reacted to obtain supporting mud, which strengthens the fixation of supporting segments. In this process, the mixing efficiency of supporting mud is low, which in turn affects the overall construction process. Therefore, Make corresponding improvements for this problem

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