Simulated testing device for hydraulic fracture of concrete member under different stress conditions

Abstract

The invention discloses a simulated testing device for the hydraulic fracture of a concrete member under different stress conditions, relating to the technical field of testing devices for the hydraulic fractures of concrete members. The simulated testing device comprises a cuboid die with an opening on one surface, wherein the die is filled with concrete to obtain the concrete member, the concrete member is internally provided with eight high-pressure-resistant water elbows in advance, and the tail end of each high-pressure-resistant water elbow is provided with a water pressure sensor connector; a steel sheet is pulled out of the concrete member to prefabricate an initial crack, a groove defined within a certain range is polished at the periphery of the crack, a strain gauge and a clip extensometer are arranged, and the groove is filled with waterproof insulating cement and ground to be flush; and the member is provided with a water seal steel sheet on which a water inlet and an exhaust port with a sealing cap are arranged. Based on the simulated testing device, the testing research for the hydraulic fracture of the concrete member can be realized under a different stress condition and different initial crack inclination angle condition combined condition.

Description

[0001] technical field [0002] The invention relates to the technical field of test devices for hydraulic splitting of concrete components. [0003] Background technique [0004] Hydraulic fracturing is a process in which the movement of water in the gaps of rock mass or concrete is coupled with the deformation of surrounding solids. It is manifested by high-pressure water flow driving the existing cracks and voids in rock mass or concrete to expand, expand, and interpenetrate. [0005] With the rapid development of dam-building technology, a batch of 200m-300m large concrete high dams have been built and put into operation. The problem of hydraulic splitting of concrete structures under the action of high water head has attracted much attention and has become a basic topic widely studied in the field of hydraulic engineering. The mechanism of hydraulic splitting of concrete is complicated, and the problem of hydraulic splitting of concrete components in actual engineeri...

AI Technical Summary

Problems solved by technology

Due to the limitations of test equipment and test technology, previous scholars only conducted high-pressure water splitting tests on concrete specimens under uniaxial tension and compression conditions, and could not carry out hydraulic splitting tests under different initial crack inclination angles.

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