Testing system for simulating hydraulic fracture of concrete members under high water pressure

Abstract

The invention discloses a testing system for simulating hydraulic fracture of concrete members under high water pressure. The system comprises a specimen mould system and a water-solid thermal coupling testing system, the specimen moulding system comprises a casting mould and a water-sealing clamp, a simulation initial crack, which vertically runs through the casting mould, is arranged on the center position of the casting mould, a water pressure measuring elbow pipe is horizontally arranged above the simulation initial crack, one end of the water pressure measuring elbow pipe is embedded into the casting mould in a position which is opposite to the simulation initial crack, and the other end of the water pressure measuring elbow pipe stretches out of the casting mould and is connected to the water-solid thermal coupling testing system. The defects that the concrete wedge fracture specimen cannot be sealed under high water pressure in the conventional fracture tests and important data such as fracture aperture, water pressure and water temperature during the test process cannot be measured when a cylinder concrete specimen is adopted in the tests are overcome, the water sealing problem of the hydraulic fracture tests under high water pressure is solved, data such as the change and strain of water pressure in the crack during the fracture process can be measured in real time, and the test system is closer to the real situation.

Description

technical field [0001] The invention relates to a test system for simulating hydraulic splitting of concrete components under high water pressure, belonging to the field of test devices. Background technique [0002] Cracks are the main response to the aging and disease of mass concrete structures. The problem of hydraulic splitting caused by high water pressure has always been a basic topic in the field of hydraulic engineering research. Due to the difficulty of concrete fracture tests under the action of water pressure and complicated devices, previous experimental studies Due to the limitations of model materials, manufacturing methods, and measurement techniques, the test uses mechanical pressure to simulate water pressure. This method cannot fully simulate the dual hydraulic effects of high-pressure water in cracks. The defect of splitting test research is that there is no in-depth study on the crack formation process and the expansion of cracks after formation, such as...

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Problems solved by technology

[0002] Cracks are the main response to the aging and disease of mass concrete structures. The problem of hydraulic splitting caused by high water pressure has always been a basic topic in the field of hydraulic engineering research. Due to the difficulty of concrete fracture tests under the action of water pressure and complicated devices, previous experimental studies Due to the limitations of model materials, manufacturing methods, and measurement techniques, the test uses mechanical pressure to simulate water pressure. This method cannot fully simulate the dual hydraulic effects of high-pressure water in cracks. The defect of the split test research is that there is no in-depth study on the crack formation process and the expansion of the crack after formation, such as crack width, concrete strain, and water pressure changes during the concrete cracking process.

Therefore, such tests cannot fully reflect the characteristics of hydraulic splitting of concrete members under high water pressure.

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