A rock-soil dry-wet cycle test device and its application method

Abstract

The invention discloses a rock soil wetting-drying cycle test device and a use method thereof. The device is characterized by comprising a loading device (1) arranged on a weighing device (2) and a heating device (3) used for heating a sample device in the loading device (1), the loading device (1) comprises a base (4) horizontally arranged on the weighing device (2), the base (4) is sequentially and vertically provided with a fixed baffle (5) and a movable baffle (6) from left to right, the bottom end of the fixed baffle (5) is fixedly arranged on the base (4), the bottom end of the movable baffle (6) is in lap joint with the base (4), and the base (4) is provided with a weir (12) used for limiting the position of the movable baffle (6). By means of the rock soil wetting-drying cycle test device and the use method of the device, loads can be applied to soil, and the water content and deformation of soil body can be precisely monitored in real time.

Description

technical field [0001] The invention relates to a rock-soil dry-wet cycle test device and a use method thereof, in particular to a dry-wet cycle test device capable of real-time monitoring of rock-soil moisture content and deformation under load conditions and a use method thereof. Background technique [0002] There are many cases of huge economic losses and casualties caused by slope instability in our country. There are many factors that cause slope instability. Among them, a large number of studies have shown that the reduction of rock and soil strength caused by the dry-wet cycle is the inherent cause of slope instability. factors and determinants. [0003] After the soil undergoes a dry-wet cycle, the strength and microstructure of the soil change. Existing dry-wet cycle test devices for rock and soil are mainly divided into two categories, dry-wet cycle test devices under load conditions and dry-wet cycle test devices under no-load conditions. Although the dry-wet c...

AI Technical Summary

Problems solved by technology

Although the dry-wet cycle test device under load conditions (such as CN102944481A) can perform dry-wet cycle tests on soil under load conditions, it cannot accurately control the moisture content of the sample, and the dry-wet cycle test cycle is longer

A test device for accelerated dry-wet cycle of rock and soil samples (CN201510405434.4) can improve the dry-wet cycle test cycle, but it still cannot accurately control the moisture content of the sample, and the test device is complicated and difficult to implement

Although the dry-wet cycle test device under no-load conditions (such as CN103776982A) can control the moisture content of the sample more accurately, it cannot simulate the dry-wet cycle test under load conditions, and the control program is relatively complicated and difficult to implement

[0004] Because the traditional soil sample dry-wet cycle test mainly relies on the method of continuously weighing the sample manually or estimating the water content of the sample according to the test experience, the process is cumbersome and interferes a lot with the sample, even the actual water content of the sample The deviation between the water content ratio and the design moisture content is very large, resulting in large dispersion of test results

Images