Soil expanding multi-parameter test device capable of simulating soaking-air-drying cyclic action

Abstract

A soil expanding multi-parameter test device capable of simulating the soaking-air-drying cyclic action comprises a water box as well as a water storage tank, a gas-water exchanger and a waste water tank which communicate with the water box, wherein the water box comprises a porous lantern ring arranged at the bottom of the water box and a lower permeable stone arranged in the porous lantern ring, an annular knife is arranged on the lower permeable stone, soil samples are arranged inside the annular knife, upper permeable stones are arranged on the soil samples, porous cover plates are arranged on the upper permeable stones, pressure transfer rods extending out of the porous cover plates penetrate through a winged box cover connected onto the water box, upper pressure plates are arranged at tops of the pressure transfer rods extending out of the porous cover plates, load sensors for testing expansion stress and displacement sensors for measuring expansion deformation are fixed at tops of the upper pressure plates and connected with a resistance strain gauge through cables respectively, and the resistance strain gauge is connected with a computer. With the adoption of the test device, dry-wet cycle operations and related expansion tests of the soil samples can be conducted in the water box directly, tedious manual operations are avoided, the test efficiency is improved, and errors caused by the manual operations are reduced.

Description

technical field [0001] The invention relates to a test device, in particular to a multi-parameter test device for soil swelling that can simulate the soaking-air-drying cycle. Background technique [0002] In recent years, some progress has been made in the research on the influence of dry-wet cycle on the soil strength of expansive soil in specific areas, but there are still few studies on the dry-wet cycle of the soil in the hydrofluctuation zone of the relevant reservoir slope. After the completion of the typical Three Gorges Project, the reservoir water level in the Three Gorges Reservoir area has been greatly increased and cyclically changed between 145 and 175m, and the hydrogeological environment of the reservoir area has also undergone tremendous changes, which will inevitably affect the stability of the bank slope. After impoundment in the Three Gorges Reservoir area, the rock and soil mass in the drawdown zone of the bank slope of the reservoir is in an alternating...

AI Technical Summary

Problems solved by technology

This process cannot truly simulate the soaking and air-drying cycle process of the soil in the water-fluctuating zone of the bank slope. During the test process, manual operations are required for each link, which is cumbersome, time-consuming, and low in test accuracy; moreover, the existing soil dilatometer can only Do the most basic natural water swelling test, unable to simulate the swelling test under the action of soaking-air-drying cycle

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