A planar sliding propulsion device for a shield machine

Abstract

The invention aims to overcome one or more defects in the prior art, and provides a plane sliding propelling device for a shield tunneling machine. The plane sliding propelling device comprises a supporting frame, a seat plate arranged on the upper side of the supporting frame and used for supporting the shield tunneling machine, a plurality of sliding assemblies, a plurality of resistance increasing assemblies and a counter-force device arranged at the tail end of the supporting frame, wherein the multiple sliding assemblies and the multiple resistance increasing assemblies are arranged on the lower side of the supporting frame; a telescopic device is arranged at one end of the shield tunneling machine, when the telescopic device extends for propelling, the resistance increasing assemblies are started to increase resistance, and thus the accelerated speed of the shield tunneling machine relative to the seat plate is greater than the accelerated speed of the supporting frame relative to the ground; and when the telescopic device retracts back, the resistance increasing assemblies are started to decrease the resistance, and thus the accelerated speed of the shield tunneling machinerelative to the seat plate is smaller than the accelerated speed of the supporting frame relative to the ground. According to the plane sliding propelling device, according to the different propellingprocesses, friction force between the propelling device and the ground is changed, continuous propelling can be achieved, energy consumption is further saved, and the construction cost is lowered.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a planar sliding propulsion device for 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 ...

AI Technical Summary

Problems solved by technology

The publication number is CN102337900A, which discloses a method for empty pushing of a circular bedding type 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 from the bracket. In actual engineering, the construction efficiency is low, the reuse rate is low, the consumption is large, and the cost is high.

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