Segment test piece used for segment longitudinal seam anti-leakage performance test and manufacturing method thereof

Abstract

The invention relates to a segment test piece used for a segment longitudinal seam anti-leakage performance test and a manufacturing method thereof. The segment test piece comprises a first segment and a second segment. The opposite ends of the first segment and the second segment are sealing surfaces. The first segment and the second segment are provided with bolt hole channels which are used for penetration of connecting bolts. The sealing surfaces of the first segment and the second segment are mutually compressed by the connecting bolts. The sealing surfaces of the first segment and the second segment are provided with frame-shaped grooves. Elastic sealing gaskets of which the head and the tail are connected in a sealing way are embedded in the frame-shaped grooves. The first segment is also provided with a water injection hole channel. One end of the water injection hole channel is arranged at the upper arc surface of the first segment, and the other end of the water injection hole channel is arranged in an area limited by the internal frame of the frame-shaped grooves on the first segment. Compared with segment test pieces and manufacturing methods in the prior art, manufacturing of the test component is performed by adopting the existing segment steel moulds of a shield tunnel so that accuracy of test data is guaranteed, test time is shortened and thus economic benefit is great.

Description

technical field [0001] The invention relates to a segment test piece for the anti-seepage performance test of the longitudinal joint of the shield tunnel segment, in particular to a segment test piece used for the anti-seepage performance test of the longitudinal joint of the shield tunnel segment and a manufacturing method thereof. Background technique [0002] For shield tunnels, water leakage has always been a prominent problem that plagues the safety and normal operation of subway structures. The survey found that most of the water leakage occurred in the joints of the segments, and the waterproof sealing of the joints is generally achieved by elastic gaskets pasted close to the outer arc of the segments. It can be seen that the impermeability of tunnel joints is very important for the reliable service of shield tunnels. The joints of shield tunnels can be divided into longitudinal joints (segment-segment) and circumferential joints (lining ring-lining ring). Therefore...

AI Technical Summary

Problems solved by technology

The above two comparative patents are based on small-scale indoor model tests, and steel mold fixtures are used to simulate segments, which cannot reflect the real contact behavior between the rubber material of the elastic gasket and the concrete groove, so the test results are quite different from the actual engineering conditions. The correctness of the results needs to be further verified

[0004] In summary, in view of the complex stress state and contact behavior of the joints of shield tunnel segments, it is difficult for small-scale indoor model tests to accurately reflect its true and reliable waterproof and sealing mechanism. Segment specimen manufacturing method for longitudinal joint anti-seepage performance test is very important for promoting the in-depth development of shield tunnel waterproofing technology

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