Rock-soil body shearing creepmeter considering dry-wet cycle and test method thereof

Abstract

The invention relates to a rock-soil body shear creepmeter considering a dry-wet cycle and a test method thereof. The invention aims to provide the rock-soil body shearing creepmeter considering the dry-wet cycle with a simple structure and convenience in operation, and the test method thereof. Not only can a shearing creep test of a soft rock or hard soil during a dry-wet cycle process be carriedout, but also a direct shearing test of the soft rock or the hard soil under a dry-wet cycle action can be also carried out. The rock-soil body shearing creepmeter considering the dry-wet cycle is characterized by being provided with a bottom plate, wherein a driven shearing box with an upward opening is arranged on the bottom plate; a rock-soil sample is placed in the driven shearing box; a drive shearing box with a downward opening is arranged above the driven shearing box, and is arranged on the rock-soil sample in a covering way. The rock-soil body shearing creepmeter considering the dry-wet cycle and the test method thereof provided by the invention are applicable to testing mechanical parameters of the soft rock or the hard soil in a dry-wet cycle environment.

Description

technical field [0001] The invention relates to a rock-soil body shear creep meter and a test method thereof considering dry-wet cycles. It is suitable for testing the mechanical parameters of soft rock or hard soil in a dry-wet cycle environment. Background technique [0002] The dry-wet cycle is a common natural working condition. For example, the natural slope rock and soil are subjected to periodic rainfall and wind drying, and the reservoir bank slope rock and soil is subjected to periodic reservoir regulation and storage, resulting in the internal slope of the slope. Rock and soil are subject to periodic dry-wet cycles, which promote complex physical and chemical reactions between water and rock and soil, and eventually lead to gradual changes in the mechanical properties of rock and soil. [0003] The changes in the mechanical properties of rock and soil under the action of dry-wet cycles are mainly manifested in two aspects: 1. The strength parameters of rock and so...

AI Technical Summary

Problems solved by technology

However, the current research still has the following deficiencies: 1. The simulation of indoor dry-wet cycle process is separated from the stress environment of rock and soil

Most of the current tests divide the dry-wet cycle and the mechanical test into two separate processes. During the dry-wet cycle process, the real stress occurrence conditions of rock and soil cannot be simulated, which leads to the deviation of the change law of rock and soil mechanical parameters from reality;2 , The heating and dehumidification method has certain damage to the internal structure of the rock and soil sample

At present, the dehumidification process simulated by the indoor dry-wet cycle process mostly adopts the method of oven drying or hot air drying. The results are inconsistent with the reality; 3. The efficiency of indoor dry-wet cycle simulation is low

Since the rock and soil mass is a poor conductor of heat, and the permeability coefficient of the rock and soil samples, especially the cohesive soil samples, is low, it is difficult to discharge the water inside the rock and soil samples through heating and dehumidification, making the dry-wet The efficiency of cyclic process simulation is low, and the size of rock and soil samples cannot be too large, which leads to the influence of certain size effects on mechanical test results

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