Propelling method for planar gliding of shield tunneling machine

Abstract

The invention aims to overcome at least one defect of the prior art and provides a propelling method for planar gliding of a shield tunneling machine. The propelling method comprises the steps that when a stretchable device stretches for propelling, a resistance-increasing assembly is started to increase the resistance, so that the acceleration of the shield tunneling machine relative to a base plate is greater than the acceleration of a supporting frame relative to the ground; and when the stretchable device retreats, the resistance-increasing assembly is started to reduce the resistance, sothat the acceleration of the shield tunneling machine relative to the base plate is smaller than the acceleration of the supporting frame relative to the ground. According to the propelling method, the maximum static friction between a propelling device and the ground in different propelling processes can be achieved only by adjusting the resistance of the resistance-increasing assembly, the stress can be switched to the resistance-increasing assembly or a gliding assembly by adjusting the height of the resistance-increasing assembly, and operation is easy; and the abrasion of the bottom of the propelling device is reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a planar sliding propulsion method of a shield machine. 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 t...

AI Technical Summary

Problems solved by technology

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 device and the bracket. , the horizontal jack pushes the shield machine forward on the bracket, and then starts the vertical jack to lift the shield machine, the horizontal jack shrinks, pushes the bracket forward, shrinks the vertical jack and the shield machine falls on the bracket Repeat the above Pushing forward, because the above device is in contact with the ground, the forward movement of the bracket and the sliding friction on the ground will easily cause damage to the bracket, and the shield machine is generally as high as thousands of tons. The bracket can be moved forward only when the machine is fully lifted away from the bracket. This method has low construction efficiency, low reuse rate, high consumption and high cost in actual engineering.

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