Test device and test method capable of simulating water pressure in tunnel

Abstract

The invention provides a test device and a test method capable of simulating water pressure in a tunnel. The test device comprises a load loading mechanism, a monitoring system and a counter-force mechanism. The load loading mechanism comprises a plurality of flexible cells and a liquid filling pump, wherein every two adjacent flexible cells are communicated with each other to form a closed structure body fitting a lining ring section, and a liquid filling pipe on one of the flexible cells is connected with a liquid outlet of the liquid filling pump. The monitoring system comprises stressometers, steel bar meters, fiber grating sensors, multi-point displacement indicators, osmometers and joint meters, wherein the stressometers and the steel bar meters are embedded into a lining, the fiber grating sensors are arranged on the inner and outer surfaces of the lining, the multi-point displacement indicators, the osmometers and the joint meters are embedded into a surrounding rock, and the signal output end of each sensor is connected with a data acquisition unit. The counter-force mechanism comprises a counter-force H-steel piece and a counter-force supporting piece which are fixedly connected with each other, one side of each flexible cell is arranged correspondingly to the lining ring section, and the counter-force supporting piece supports the other side of each flexible cell. The test device is capable of simulating detection of the concrete lining construction quality and prestress applying effect during operation of the tunnel filled with water.

Description

technical field [0001] The invention relates to a test device and method for simulating water pressure in a tunnel, belonging to the technical field of water conservancy and hydropower engineering. Background technique [0002] With the vigorous construction of national water transmission projects, ring-anchor prestressed concrete lining technology is generally adopted for pressurized water transmission tunnels with poor surrounding rock conditions and thin covering layers, and ring-anchor prestressed concrete lining can be divided into bonded There are two kinds of ring anchor prestressed concrete lining and unbonded ring anchor prestressed concrete lining. [0003] During the design and construction of ring-anchored prestressed concrete lining, it is generally necessary to conduct model or field construction tests to monitor the stress and crack development of the lining during the construction and operation periods, so as to ensure the safety of project construction and o...

AI Technical Summary

Problems solved by technology

The advantage of this method is that it completely simulates the stress of the lining 7 under water pressure during the operation period, and no uneven water pressure will be generated on the lining. In addition, if the in-situ water injection test is carried out, the transportation and continuous supply of water and the corresponding supporting facilities will greatly increase the difficulty of the test, and even due to the closedness of the tunnel, the two water blocking ends will be in an isolated state , there will also be problems in the treatment of water leakage when there are cracks in the lining, and the drainage after the test will also cause damage to the surrounding construction environment

Images