Method for testing sealing performance of shield pipe sheet waterproof gasket

Abstract

The invention relates to a method for testing the sealing performance of a shield pipe sheet waterproof gasket. The method comprises: Step 1: using a jack to calibrate the stress and voltage relationship of the piezoelectric film sensor; Step 2: pasting the calibrated piezoelectric film sensor on the waterproof gasket of the specified measuring point; Step 3: maintaining the position of the contact port of the calibrated piezoelectric film sensor and assemble the shield machine pipe sheet; Step 4: connecting the contact port to external devices and collecting and recording electrical signals;Step 5: inverting the collected electrical signals into the corresponding contact pressure according to the relationship between stress and voltage and compare it with the contact pressure specified by the waterproof failure index. Compared with the prior art, the method for testing sealing performance of shield pipe sheet waterproof gasket has the advantages of high reliability, strong adaptability, comprehensive functions and strong expandability, can realize the recognition of the contact pressure of the shield pipe sheet waterproof gasket, and the recognition precision is high.

Description

technical field [0001] The invention relates to a waterproof detection technology in the traffic field, in particular to a method for testing the sealing performance of a shield segment waterproof gasket. Background technique [0002] With the continuous increase of urban traffic ground pressure, urban rail transit projects have been continuously carried out in recent years. The waterproof performance of the long-term serviceability of the tunnel has attracted more and more attention. [0003] At present, shield tunnels are affected by factors such as deformation, opening, staggering, and cracks of segments, and there are often water leakage problems, which seriously affect the normal performance and operational safety of the tunnel. In order to solve the problem of joint waterproofing in the project, It is mainly completed by setting waterproof gaskets. Its waterproof performance is mainly controlled by the contact pressure between waterproof gaskets. At present, there is ...

AI Technical Summary

Problems solved by technology

[0003] At present, shield tunnels are affected by factors such as deformation, opening, staggering, and cracks of segments, and there are often water leakage problems, which seriously affect the normal performance and operational safety of the tunnel. In order to solve the problem of joint waterproofing in the project, It is mainly completed by setting waterproof gaskets. Its waterproof performance is mainly controlled by the contact pressure between waterproof gaskets. At present, there is no effective method for visually testing the contact pressure. At the same time, the opening of the tunnel joint and the structural displacement can be reversed through the contact pressure. and other important state parameters, but there is still no set of complete evaluation indicators and methods for seam safety.

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