An all-in-one machine suitable for mudstone dry-wet cycle test and triaxial test

Abstract

The invention provides an all-in-one machine applicable to a mudstone wetting-drying cycle test and a triaxial test. The all-in-one machine comprises a base; two uprights and a counter force thick wall are fixed on the base; a ring-shaped oil pressure bag is placed inside the counter force thick wall and oil pressure sensors are mounted in the thick wall; the oil pressure bag surrounds a cylindrical mudstone test sample; a bottom pressure shaft is fixed on the base; the upper end of the bottom pressure shaft is connected with a bottom axial pressure plate; the mudstone test sample is supportedto the bottom axial pressure plate; the upper end of the mudstone test sample is covered by a top axial pressure plate; the upper part of the top axial pressure plate is connected with the lower endof a top pressure shaft; the upper end of the top pressure shaft is connected with a lifting table; the lifting table is erected on a lifting machine; a pressure sensor is mounted on the top pressureshaft; a displacement sensor is mounted at the bottom end of a carrier table; electric heating pipes are arranged in a drying oven; the all-in-one machine further comprises a pressure water pipe, a computer and a CT scanner; and the pressure water pipe is connected into a gap between the inner wall of the oil pressure bag and the mudstone test sample. According to the invention, wetting-drying cycle slaking and the triaxial test can be carried out under the true stress condition, which is helpful for disclosing a mechanical response of the mudstone.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to an integrated machine suitable for mudstone dry-wet cycle test and triaxial test. Background technique [0002] Under the conditions of dry-wet cycles, mudstone usually exhibits obvious characteristics such as water disintegration, dissolution, mudification, dehydration and dry cracking, which easily cause corresponding engineering problems, thus attracting widespread attention. Mudstone dry-wet cycle disintegration test research has been relatively common. Many scholars at home and abroad have carried out relevant research, not only revealing the disintegration mechanism of mudstone from the macro and micro levels, but also proposing a series of quantitative indicators to quantitatively characterize the disintegration mechanism of mudstone and its Degree of Disintegration, Service Engineering Practice. At present, the operating methods of this type of test have...

AI Technical Summary

Problems solved by technology

At present, the triaxial test is a relatively reliable and mature test method for studying rock mechanical properties. However, this test technology has not been well integrated with mudstone dry-wet cycle samples into the same test system.

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