Dynamic Monitoring Technology and Experimental Verification of Water Pressure in Shield Tunnel Construction
In order to solve the difficulty of real-time monitoring of water pressure during shield construction,a water pressure monitoring device that can be integrated in the shield body is independently developed.In addition,a set of indoor test system for testing the performance of the device is designed,and the basic performance indicators of the water pressure monitoring device such as tightness,pressure resistance,sensitivity,accuracy and anti-blockage are tested.The results show that the water pressure monitoring device has not occurred leakage phenomenon during the test load application and it has a good sealing.Under the high water pressure condition of 1.25 MPa,the device can maintain the normal working state and it has good pressure resistance.As the water pressure load changes step by step,the device is sensitive and the reading error is less than 3%.In the condition of high viscosity slurry and clay,the device does not have the blockage problem,and the anti-blockage is excellent.All the performance indexes of the device can meet the need of water pressure monitoring in shield tunnel construction,and can provide technical support for water pressure monitoring during the construction of similar projects in the future.
shield tunnelconstruction water pressurestatic monitoringwater pressure monitoring device in shield tunnelperformance test
NETL
NSTL
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