Soil body water saturation-drainage circulation compression test method and device

Abstract

The invention aims to provide a method for simulating a soil body water saturation-drainage circulation process and carrying out a compression test on a soil body. The invention provides a soil body water saturation-drainage circulation compression test method, comprising the following steps of: 1) preparing a test sample needed by a lateral confinement compression test or consolidation test; 2) enabling the test sample in the step 1) to be saturated; 3) draining; 4) saturating; 5) repeating the steps 3) and 4) for a plurality of times; and 6) carrying out the lateral confinement compression test or the consolidation test. A device for realizing the method mainly comprises an axial loading system and a pressure chamber. The pressure chamber comprises a pressure chamber cylinder, a top cover and a base. In a test process, the test sample is mounted on a pot clay plate and an annular porous stone; a test sample loading plate is mounted on the test sample; and a force transmission device of the axial loading system penetrates through the top cover to be contacted with the test sample loading plate.

Description

technical field [0001] The invention relates to the test of the basic mechanical properties of the soil, in particular to simulate the soil which has undergone a saturation-drying cycle under laboratory conditions, and carry out a confining compression test or a consolidation test on the soil. Background technique [0002] After the storage and operation of large-scale reservoirs (such as the Three Gorges Reservoir on the Yangtze River), the water level of the reservoir will rise and fall periodically with the regulation of the reservoir, and the water level of the reservoir will vary greatly. For example, the Three Gorges Reservoir on the Yangtze River, according to its operation plan, after normal impoundment, the water level in front of the dam varies between 175m and 145m every year, and the maximum variation of the water level reaches 30m. During the periodic rise and fall of the reservoir water level, the groundwater level of the reservoir bank and the seepage line of ...

AI Technical Summary

Problems solved by technology

Traditional compressometers are usually not airtight, and the disadvantage is that they cannot simulate the saturated-drain cycle process of the measured soil

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