Test apparatus and method for simulating hydraulic fracture of concrete under high water pressure

Abstract

The invention discloses a test apparatus and method for simulating the hydraulic fracture of concrete under a high water pressure. The apparatus comprises a concrete sample, a water pressure supply system and a data acquisition system, the concrete is provided with a crack in advance, and the water pressure supply system comprises an electrically controlled pressure pump. The method comprises the following steps: 1, making a die; 2, pouring the sample; 3, carrying out demolding curing; 4, loading the sample; and 5, testing: introducing water into the crack through the electrically controlled pressure pump, and gradually improving the water pressure until the concrete sample is destroyed; and 6, analyzing the hydraulic fracture: replacing the concrete sample, repeating step 4 and step 5, and analyzing the phenomenon and the mechanism of the hydraulic fracture of the concrete sample according to a result obtained after several tests. The water pressure and deformation parameters are fast to acquire.

Description

technical field [0001] The invention relates to a test device and method for simulating hydraulic splitting of concrete under high water pressure, and belongs to the technical field of hydraulic engineering. Background technique [0002] The hydraulic concrete structure is affected by factors such as design, construction and maintenance, and the existence of cracks is inevitable. The appearance and expansion of cracks will affect the safety, practicality and durability of structures. The damaged cracks in the dam body may further expand under the action of deep water pressure and temperature change. If the cracks extend for a long time, it may damage the integrity of the dam body and develop into a leakage channel, threatening the safety of the dam body and causing huge damage. Economic and loss of life and property. Therefore, the problem of hydraulic splitting of hydraulic concrete structures has become a hot issue that urgently needs to be studied and solved. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] In the previous test methods of hydraulic splitting, the method of using mechanical pressure to simulate water pressure could not truly simulate the action of high-pressure water in cracks; in the research of experiments under the action of water pressure, the pouring of samples was cumbersome, and the problem of high-pressure water sealing was not solved. It is well resolved, and the method of applying pressure and sealing by external force will affect the stress state inside the sample

And there are problems such as unsynchronized data collection and cumbersome data processing

There are flaws in these test methods

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