Locking device for tunnel segment

Abstract

The invention discloses a locking device for a tunnel segment. The locking device for the tunnel segment comprises a first baffle, a second baffle, a first lead screw, a first locking component, a second locking component and a third locking component, wherein the first baffle is fixed on a front-end bottom plate; the second baffle is fixed on a first rear-end bottom plate; the first lead screw penetrates in the first baffle and the second baffle; the first lead screw is fixed on the first baffle by the first locking component, and is fixed on the second baffle by the second locking component; the front-end bottom plate is fixed on a K-shaped segment of a tunnel segment; and the first rear-end bottom plate is fixed on an A-shaped segment by the third locking component. By the locking device for the tunnel segment, the retreating amount of the K-shaped segment retreating towards a tunneling direction in a construction process can be reduced, the probability of water leaking from gaps due to the fact that gaps among segments are over large is reduced, and assembling quality of shield segments is improved.

Description

technical field [0001] The invention relates to the technical field of shield construction segment assembly, in particular to a locking device applied to tunnel segments. Background technique [0002] At present, in the shield construction, the assembly quality of the shield segments is the key to the quality of the entire formed tunnel, and it is also the key to ensure the safety and reliability of the shield construction. The assembly sequence of the shield segments is usually from Begin with the lower standard block (type A) segment, install the standard segment alternately on the left and right sides, then assemble the adjacent block (type B) segment, and finally install the capping block (type K) segment. However, in the process of high water pressure construction, after shrinking and jacking the oil cylinder of the upper ring K-type segment, the K-type segment will retreat 1-2cm in the heading direction under the action of high water pressure, resulting in the upper ri...

AI Technical Summary

Problems solved by technology

However, in the process of high water pressure construction, after shrinking and jacking the oil cylinder of the upper ring K-shaped segment, the K-shaped segment will retreat 1-2 cm in the direction of excavation under the action of high water pressure, resulting in the upper ring K-shaped segment and The gap of the segment in the previous ring increases, and the mud and grouting liquid are ejected from the gap. In severe cases, the sealing strip of the segment is washed out, and the water-stop sealing effect is lost, or the front end of the K-shaped segment is caused by a large amount of retreat. If the segments of the previous ring are damaged and fractured, they need to be shut down for processing before the assembly operation is carried out. In this way, the K-type segments in the existing shield assembly segment have a large amount of retreat in the direction of excavation during the construction process. question

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