A shield machine propulsion method

Abstract

The present invention aims to overcome at least one defect of the prior art, and provides a shield machine propulsion method, so as to reduce the manufacturing cost of the support and realize the purpose of recycling the support. The method includes: S1: placing the shield machine on the support group, keeping the forward direction of the shield machine parallel to the support; connecting the outer end of the horizontal push cylinder of the shield machine to the reaction member; S2: starting the shield machine push the horizontal push cylinder of the shield machine, and push the shield machine to slide along the direction of the head end; S3: When the shield machine is completely separated from at least the first support, stop the horizontal push cylinder of the shield machine from extending, and connect the horizontal push cylinder of the shield machine with the Separation of the reaction force member, separating the first support from the second support; S4: shrink the horizontal push cylinder, shrink the horizontal push cylinder to connect the reaction force member of the second support; S5: move the separated first support Install and fix to the head end of the support group; S6: Repeat steps S2, S3, S4, and S5 in a cycle to push the shield machine to the designated position. The method of the invention is simple to operate and can realize dynamic recycling of the support.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a shield machine propulsion method. Background technique [0002] In recent years, with the rapid development of cities, the construction of urban subways has developed rapidly, and the construction of urban rail transit has become more and more popular. Shield excavation is now the main method of urban subway construction, but when encountering some complex geology, other construction methods are required. When constructing a tunnel, when the shield machine reaches the excavated tunnel, it is necessary to empty push the shield machine through the excavated tunnel section. In order to ensure that the shield machine is smoothly pushed through the excavated tunnel section, the concrete guide platform in the excavated tunnel is used as the shield body support, and the steel rail laid on the guide platform is used as the shield body walking track. As the propulsion power ...

AI Technical Summary

Problems solved by technology

Application No. 2018111103796 discloses an empty push stepping device. This device adopts the method of laying guide rails on a concrete guide platform with a thickness of tens of centimeters, and reserves a reaction force hole on the guide platform, and inserts the reaction force member into the reaction force hole. The horizontal pushing cylinder of the shield machine acts on the reaction member to advance along the track; both of the above two devices need to lay concrete in advance, which costs a lot of labor and concrete. ,low efficiency

[0004] The publication number is CN102337900A, which discloses a method for empty pushing of a circular matting shield machine. The device is provided with a bracket at the bottom of the shield machine, and two rows of vertical jacks are arranged on both sides, and the horizontal jack transmits force through the reaction force member and the bracket. , the horizontal jack exerts force to push the shield machine forward on the bracket, then start the vertical jack to throw away the shield machine, the horizontal jack shrinks, pushes the bracket forward, shrinks the vertical jack and the shield machine falls on the bracket and repeats the above direction Forward propulsion, the above-mentioned device is easy to cause damage to the bracket due to the contact between the bracket and the ground, the forward movement of the bracket and the sliding friction on the ground, and the shield machine is generally as high as thousands of tons, and the vertical jack needs a lot of power. In actual engineering Low efficiency, low reuse rate, high cost

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