Device capable of adjusting saturation degree of soil sample and application method of device

Abstract

The invention provides a device capable of adjusting the saturation degree of a soil sample. The device comprises a saturation container, a weighing system, a pressure spraying system and a control system which is in wireless connection with the weighing system and the pressure spraying system; the weighing system is arranged in the saturation container and comprises an electronic scale, a supportfixedly connected with the upper end of the electronic scale and a water permeable plate arranged at the upper end of the support, and the water permeable plate can rotate relative to the axis wherethe support is located; the pressure spraying system comprises an atomizing sprayer arranged on one side of the water permeating plate, a water guide hose and an air guide hose, and the water guide hose and the air guide hose are communicated with the atomizing sprayer; the atomizing sprayer is arranged on a guide rail and can move up and down along the guide rail to be positioned; a nozzle with an adjustable angle is arranged at the front end of the atomizing sprayer and extends in the direction of the water permeating plate; an atomizing degree adjusting valve is arranged at the rear end ofthe atomizing sprayer. The invention further provides an application method of the device capable of adjusting the saturation degree of the soil sample. The device has the advantages of being simple in structure, convenient to use, capable of saving time and labor and capable of reducing the damage to the sample in the testing process on the basis that the saturation degree is adjusted according to requirements.

Description

technical field [0001] The invention relates to the field of soil engineering tests, in particular to a device capable of adjusting the degree of saturation of soil samples and a method for using the device. Background technique [0002] The influence of rainfall and water level changes on the mechanical properties of soil is irreversible. During laboratory tests, the experimental method of dry-wet cycle is usually used to simulate the shallow surface, embankment, slope and reservoir area dams that are subjected to water level fluctuations or rainfall. - Effect of wet-dry cycles caused by evaporation process. The dry-wet cycle refers to the test process of a substance in a repeated dry and wet state for a certain index. Studying the mechanical properties of soil under dry-wet cycle conditions has important practical significance for designing new geotechnical structures and evaluating the safety and stability of existing geotechnical structures. [0003] For example, the l...

AI Technical Summary

Problems solved by technology

However, the saturation process at this stage is limited by the test equipment and often cannot meet the needs of researchers for refined operations according to the needs of the test, which shows the following problems:

[0005] (1) Chinese patent CN201220526431.8, this soil sample saturation adjustment device has only one nozzle to saturate the soil sample with water from a fixed angle, which is very easy to cause scour on the surface of the sample, and cannot achieve uniform spraying and on-demand adjustment

[0006] (2) Chinese patent 201710100231.3, although this device can realize the saturation of the triaxial sample, but the structure is complex, and there are many interfaces to be connected, the steps are lengthy, and the carbon dioxide saturation needs to be carried out first, and then replaced with pumping and water saturation

[0008] ①The whole set of vacuum saturation device is complex

[0010] ②Complicated vacuum saturation process

Especially for special-shaped samples, such as tensile samples, there is often no matching saturator to hold the sample, which makes the saturation process of special-shaped samples difficult, and a series of dry-wet cycle processes cannot be realized.

[0014] ④The test result is single

[0015] This device can only fully saturate the sample, but cannot precisely control the final saturation of the sample

[0016] ⑤ Time-consuming and labor-intensive

[0017] The whole test process lasts up to 9 hours. For test researchers, the saturation process often affects the normal progress of follow-up experiments.

Laborious: Human intervention is required to inject water during the test

This series of processes will often lead to a slight difference in the time for the sample to be vacuumed and the time for the sample to be soaked in water due to human factors, and the sample groups with different initial conditions will often lead to large discrepancies in the test results. Affect the accuracy of the test

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