Test device for measuring shearing creep characteristic of rock in dry-wet cycling process

Abstract

The invention belongs to the field of geotechnical engineering and particularly relates to a test device for measuring the shearing creep characteristic of rock in a dry-wet cycling process. The test device comprises a loading device for pressing a rock sample, a measuring device for measuring deformation of the pressed rock sample and a dry-wet cycling device for dry-wet cycling treatment of the rock sample, and further comprises a box body communicated with the dry-wet cycling device and used for accommodating the rock sample, wherein the box body is divided along a shearing plane of the rock sample into a first shearing semi-box and a second shearing semi-box; the second shearing semi-box is fixed through a fixing device; the loading device presses the first shearing semi-box along the shearing plane and in the direction perpendicular to the shearing plane. The test device can realize real-time observation and measurement of the deformation, the shearing strength parameter, the failure mode and the like of the rock sample after different dry-wet cycling indexes under the cyclical variation condition of the water level of an emulation library.

Description

Technical field [0001] The invention belongs to the field of geotechnical engineering, and in particular relates to a test device for measuring the shear creep characteristics of rocks during the dry-wet cycle. Background technique [0002] Periodic changes in the reservoir water level cause the rock and soil to be in a state of "dry-saturation". The engineering geological disasters caused by this have attracted the attention of many scholars and engineering circles. The study of water-rock interaction has become a major issue in geotechnical engineering. Hot Issues. The water-rock interaction is mainly manifested as: (1) The water-rock interaction causes changes in the mineral composition, porosity, cement and their arrangement and combination of rock and soil, which causes rock damage and causes its shear strength parameters to change significantly. Decrease, leading to the destruction of soft rock, and even the instability of the bank slope, which threatens the long-term stab...

AI Technical Summary

Problems solved by technology

The research on the impact of dry-wet cycles on rocks mainly focuses on the mechanical properties of rocks after different times of dry-wet cycles. The study of rock creep characteristics under dry-wet cycles is still in its infancy. Quantitative determination of relevant important parameters There are few tests, especially the shear strength parameters, which limit the development of the theoretical system of rock rheology

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