A test device and test method for hydraulic splitting of concrete members under triaxial stress

A technology of hydraulic splitting and triaxial stress, which is used in the application of stable tension/pressure to test the strength of materials, measuring devices, and preparation of samples for testing, etc. It is impossible to truly reflect problems such as hydraulic splitting, and achieve the effect of widespread promotion.
CN111896384BActive Publication Date: 2021-09-28HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2021-09-28

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Abstract

The invention discloses a concrete member hydraulic splitting test device and test method under triaxial stress, including a triaxial loading system, a water sealing device, a hydraulic loading system and an acoustic emission testing system; the water sealing device includes two sealing steel plates, T-shaped convex groove, T-shaped sealing gasket, water inlet hole and water outlet hole; two sealing steel plates are attached to the front and rear sides of the concrete member, and both are provided with T-shaped convex grooves, which are respectively connected with prefabricated cracks; Each T-shaped convex groove is sealed with a T-shaped gasket; each T-shaped gasket is equipped with an L-shaped reserved hole; the hydraulic loading system is used to apply a high-pressure water head of 0~400m to the prefabricated crack; The acoustic emission test system is used to monitor the acoustic emission signal of the development and change of prefabricated cracks during the hydraulic splitting process of concrete components. The invention can simplify the test operation process and effectively monitor the splitting process over time, and at the same time realize the hydraulic splitting research of the concrete member under the triaxial stress, which is close to the actual engineering situation.
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Description

technical field

[0001] The invention relates to the technical field of large-scale concrete building simulation tests in hydraulic engineering and geotechnical engineering, in particular to a hydraulic splitting test device and test method for concrete components under triaxial stress. Background technique

[0002] Concrete is a building material widely used in engineering at present. Due to the influence of construction, temperature, material properties, environmental factors, etc., there are inevitably many micro-cracks and pores inside it. When encountering a high water head, the high osmotic pressure can easily make the defects such as micro-cracks and pores in the concrete further develop, expand and extend, and form macroscopic cracks, resulting in hydraulic splitting. The bearing capacity and stability of the structure are significantly reduced, and even catastrophic accidents occur. For example, the anti-seepage curtain of the Kolnbrein arch dam in Austria produced ...

Claims

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