A simple rock weathering and creep deformation integrated test device and test method

Abstract

The invention provides a simple rock weathering and creep deformation integrated test device and test method. The device can be used for developing the creep deformation test of the rock under the stable dead load effect, the weathering test and the creep deformation test of the rock are simultaneously performed in the process, and the long-term creep deformation test of the rock is realized underthe stable dead load-dry-wet cycle or cold-heat cycle coupling effect. The device includes a sample container system, a lever loading mechanism, a water cycle system and an air blast system. The sample container system has a cylindrical barrel with holes which forms a lateral constraint on the rock sample and a heating device which performs heating on the rock sample, the water cycle system performs humidifying on the rock sample, the air blast system performs drying and cooling on the air blast system, and the dry-wet cycle and cold-heat cycle are realized by the rock sample. The lever loading mechanism vertically effects on the rock sample, and the constant weight loading and unloading are performed.

Description

Technical field [0001] The invention relates to a rock property testing device and method, in particular to a creep deformation testing device and a testing method that can carry out the weathering process of rock under lateral restraint and axial load. Background technique [0002] At present, my country's high-speed railway operating mileage has reached 22,000 kilometers, ranking first in the world. At the same time, a large number of lines are under construction, which will reach 30,000 kilometers by 2020. The construction of high-speed railway involves a large number of rock projects, including rock deep cutting, deep tunnel excavation, deep bridge foundation excavation, etc. These must be based on a clear understanding of the physical and mechanical properties of related rocks. Among them, the weathering phenomenon of rock under the action of the external environment and the creep deformation caused by the load over time are the key factors affecting the stability of the hi...

AI Technical Summary

Problems solved by technology

In addition, the existing rock creep test device needs to realize the long-term constant load effect, which is often realized by the electro-hydraulic servo system, and the system control accuracy and stability are very high, which also makes the test equipment expensive and the test cost high , and due to the difference between the test conditions and the actual situation, it is difficult to directly use the test results for the evaluation of long-term structural deformation caused by the excavation of high-speed railway cuttings, tunnels, bridge foundations, etc.

Images