Shield tunnel segment joint sealing gasket leakage test device

Abstract

The invention relates to a shield tunnel segment joint sealing gasket leakage test device, so as to carry out leakage test on an elastic sealing washer. The test device comprises an upper sample module and a lower sample module to form a test cavity in mutual buckling by a displacement control unit; the test cavity comprises an inner channel sealing cavity, an inner channel sealing gasket trapezoidal groove, an outer channel sealing cavity and an outer channel sealing gasket trapezoidal groove sequentially from the center to the periphery; the inner channel sealing gasket trapezoidal groove isinternally provided with an inner channel elastic sealing washer; the outer channel sealing gasket trapezoidal groove is internally provided with an outer channel elastic sealing washer; and the upper sample module is provided with multiple measurement loading channels communicated with the test cavity. Compared with the prior art, the shield tunnel segment joint sealing gasket leakage test device has the advantages of real simulation, waterproof arrangement of two channel sealing gaskets, and opening and staggering working condition design.

Description

technical field [0001] The invention relates to the field of existing shield tunnel seam waterproofing engineering, in particular to a shield tunnel segment seam gasket leakage test device. Background technique [0002] Water leakage in shield tunnels is currently one of the main problems affecting the safety and operation of shield tunnels. attracted the attention of many scholars in the industry. According to the survey, most of the water seepage in the shield tunnel occurs at the joint joints. Therefore, if the waterproof ability of the joints is effectively judged and the degree of damage to the joints that have leaked has occurred, it is the current shield tunnel project. Problems to be solved. The prediction of the waterproof performance of the joints without leakage and the evaluation of the water leakage of the joints with leakage are the key technical contents to improve the long-term waterproof performance of shield tunnels. They not only have leading technical s...

AI Technical Summary

Problems solved by technology

It can be seen that the above patents can neither meet the general needs of engineering applications, nor can they meet the theoretical research on the leakage mechanism of gaskets

[0005] The Chinese invention patent specification with the application number 201510410037.6 discloses a "two-way waterproof" watertightness test device for the elastic gasket of a shield tunnel, which can simulate the permeability of the elastic gasket and the concrete interface. During the implementation process, there are practical application problems that the gasket is difficult to compress and close, and the sealing performance of the section is difficult to handle

And in actual engineering, the corner of the gasket is the most prone to leakage. The above-mentioned device can only test the waterproof performance of a small section of the gasket, and cannot effectively simulate the waterproof performance of the gasket with corners, which is quite different from the actual situation. gap

[0006] There are very few existing test devices for the leakage mechanism of gaskets, and the only existing devices also have some major shortcomings, which are summarized as follows: (1) The water leakage process of gaskets has not been studied, and it is impossible to measure The leakage flow rate of the gasket; (2) the waterproof performance of the gasket with corners cannot be simulated, and there is a big gap with the actual; (3) the size of the test piece is small, and the size effect has a great influence

Images