Shield segment local water pressure resistance detection device

Abstract

The invention discloses a shield segment local water pressure resistance performance detection device which comprises a support part, the support part comprises at least two support columns for supporting a segment from the bottom of a segment, and the distance between the at least two support columns can be adjusted; the device also comprises a water pressure loading part which comprises a water pressure loading cup which is inversely buckled and fixed on the to-be-detected part of the segment, and the end part of a cup opening of the water pressure loading cup is attached to the outer wall of the segment; the water pressure loading part comprises at least one water body injection port; the water body injection port is formed in the side wall or the top wall of the water pressure loading cup; and the cup opening end part of the water pressure loading cup is hermetically connected with the outer wall of the segment. According to the shield segment local water pressure resistance detection device, the water pressure resistance of the segment can be rapidly detected.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a device for detecting local water pressure resistance performance of segments used in shield tunneling. Background technique [0002] At present, the shield method has become the most mainstream and important construction method for tunnel construction, and has a wide application market and prospects. [0003] As the permanent support structure of the shield tunnel, the segment mainly plays the role of supporting the surrounding rock and separating the hydraulic connection inside and outside the tunnel in the shield tunnel engineering. In order to facilitate transportation and assembly, in actual engineering, segments are usually designed into segment blocks of different types and sizes. During construction, different types of segment blocks are assembled into segment rings according to certain rules through bolts to form permanent tunnel supports. protection system. ...

AI Technical Summary

Problems solved by technology

However, the concrete at the bottom of the grouting pipe (the part of concrete between the bottom of the special pre-embedded grouting pipe and the back soil side of the segment), during the construction process, because the secondary grouting needs to be backfilled without sealing the hole, the concrete at this place is relatively thin (such as The thickness of the segment of the conventional subway shield tunnel is 300mm, and the thickness of the concrete at the bottom of the grouting pipe is only 30mm), and the irregular prefabrication process and transportation process can weaken the mechanical performance of this place. Under the action of high water pressure, the accident was exposed, causing groundwater to pour into the shield tunnel, causing damage to the shield equipment in the slightest, and submerging the tunnel and mechanical equipment in severe cases, causing accidents such as river backflow

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