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

A technology of hydraulic splitting and testing device, which is applied in the application of stable tension/pressure to test the strength of materials and the preparation of test samples, etc., can solve the problems such as the inability to carry out hydraulic splitting test, and achieve the effect of wide practicability

Active Publication Date: 2014-04-02
HOHAI UNIV
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  • Abstract
  • Description
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  • Application Information

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 specimen

Method used

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

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Embodiment Construction

[0030] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0031] Such as Figure 1 to Figure 5 As shown, a hydraulic splitting test device for simulating concrete components under different stress conditions includes a cuboid mold 12 with an opening on one side. Concrete is poured into the mold 12 to obtain a concrete component 8. Eight high-pressure resistant water bends 5 are preset in the concrete component 8. , the end of each high-pressure resistant water bend 5 is provided with a water pressure sensor connector 6; a certain range of grooves are ground around the prefabricated initial crack 1, and the clip-type extensometer 2 and strain gauge 3 are arranged, and the grinding is filled with water-proof insulating glue 10 Flat; the water-sealed steel plate 7 is set on the concrete member 8, and the water-sealed steel plate 7 is arranged with a water inlet 13 and an exhaust port with a sealing cap 14.

[00...

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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...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N1/28
Inventor 甘磊沈振中徐力群严中奇焦延涛黄青福柴先墩宗原
Owner HOHAI UNIV
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