Tester for soil frost-heaving ratio

Abstract

A tester for a soil frost-heaving ratio comprises a base support and a thermostat mounted on the base support, wherein a test platform supported by support rods is arranged in the thermostat, a sample box is arranged on the test platform and adopts a round structure, a hollow structure is arranged in the middle of the sample box, and a pressurization system, a temperature detection system and a deformation detection system are arranged on the sample box; the pressurization system comprises an upper top cover, a lower top cover, an upper bottom plate, a lower bottom plate and a screw rod; the temperature detection system comprises a thermistor thermometer; the deformation detection system comprises a displacement sensor; the upper top cover and the lower bottom plate are jointly connected with a temperature control system and a water replenishment system. The tester can accurately test the frost-heaving ratio of a soil sample and is applicable to detection of different kinds of soil at different freezing temperatures, and a proportional relation between frost heaving force and the frost-heaving ratio is obtained. The tester is simple in structure and convenient to operate and contributes to research of the frost-heaving rule of the soil sample.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a soil frost heaving rate tester. Background technique [0002] Uneven frost heave deformation of soil is one of the important factors for the massive damage of projects in cold regions. Therefore, before each project is launched, it is necessary to evaluate the frost heave of the soil in the area where the project is located, so as to take corresponding measures to ensure the safety of engineering structures. It is safe and reliable. The basic eigenvalue of soil frost heave deformation is the frost heave rate. However, due to the different conditions such as freezing depth in different places, the value of the frost heave rate varies greatly. In order to facilitate the comparison of the strength of the frost heave deformation, the frost heave rate is used The ratio of the rate to the thickness of the frozen soil layer, that is, the frost heave rate (in percentag...

AI Technical Summary

Problems solved by technology

[0003] Frost heave means that when the soil has a certain water content and the temperature drops below zero, the bound water in the pores of the soil migrates and accumulates to the freezing front, condenses into ice, and the volume of the soil increases, generating an outward force. Different soils have different frost heave values ​​under different water contents. Before building roadbeds and building foundations, it is necessary to test the frost heave rate of the soil in which they are located, and the current measuring equipment cannot completely simulate the actual conditions of the outside world. Condition, test the soil sample, the temperature of the testing environment of the soil sample during the test will have a great impact on the structure of the test point, and at the same time, the soil sample needs to be accurately tested during the test, but the test takes a long time In the process of operation, it is necessary to carry out precise control and record the test results in detail, so as to obtain the proportional relationship between the force and frost heave rate of the soil sample at different ambient temperatures, so there is an urgent need for a precise control and real Test instruments that simulate the actual external conditions, and realize the test of the frost heave rate of soil samples through artificial intelligence control

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