Comprehensive soil frost heaving test device and method

A frost heave test and test method technology, applied in the field of soil test, can solve the problems affecting the safe operation of railways and highways, reduce the quality of railway use, reduce the service life, etc. Effect

Pending Publication Date: 2018-01-23
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, reduce the use quality of railways, highways and other projects, and reduce their service life
On the other hand, the subgrade deformation caused by frost heaving will seriously affect the safe operation of railways and highways, bring huge economic losses, and have a negative impact on society

Method used

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  • Comprehensive soil frost heaving test device and method

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Embodiment Construction

[0031] Specific embodiments of the present invention are provided below, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations done on the basis of the technical solutions of the present application all fall within the scope of protection of the present invention.

[0032] Such as figure 1 As shown, the soil frost heave test device of the present invention includes an inner frost heave test cylinder and an outer double-layer insulation system. Among them, the frost heaving test cylinder includes a cylinder body 1 with a heating function for containing soil samples, a top plate 2 and a bottom plate 3 with good thermal conductivity, both of which are heat exchange plates, and are used to load the cylinder body 1 The soil sample is subjected to a cold bath, and the inside of the top plate 2 is provided with a circulation channel for the refrigerated liquid, and the top of the top plate 2 is provi...

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Abstract

The invention discloses a comprehensive soil frost heaving test device and method. The lower end of a barrel in the device is arranged on a base plate, a top plate is arranged in the inner cavity of the barrel and can slide along the axial direction of the barrel, and the top plate and the base plate are heat exchange plates respectively; an insulating layer coats the outer surface of the barrel;multiple groups of temperature sensors are arranged at intervals along the axial direction in the barrel for measuring temperatures of a soil sample at different height positions along the axial direction; and a displacement measurement device is used for measuring distance of the barrel moving along the axial direction. When a soil frost heaving test is carried out, the soil sample is cooled by virtue of the top plate and the base plate for simulating soil freezing; and in a freezing process, frost heaving amount and frost heaving ratio of the soil sample can be obtained by virtue of displacement, measured by the displacement measurement device, of the top plate, and the comprehensive soil frost heaving test device and method are applicable to frost heaving tests carried out on fine-grained soil and coarse-grained soil under different conditions. The frost heaving test barrel is easy to make, cost is saved, application range is wide, and test efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of soil testing, and relates to a frost heaving test device and method capable of carrying out fine-grained soil and coarse-grained soil under different conditions, in particular to a comprehensive soil frost heaving test device and method. Background technique [0002] Permafrost is a kind of soil rock with a temperature below 0°C and containing ice. According to the duration of the frozen state, frozen soil can be divided into three categories, namely instantaneous frozen soil, seasonal frozen soil and permafrost. Seasonally frozen soil is widely distributed in all continents of the world and most of China's land. In my country, seasonally frozen soil accounts for 53.5% of the country's land area. The frozen state of seasonal frozen soil usually lasts between half a month and several months. A large number of engineering practices and research results at home and abroad have shown that frost heave is an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/16
Inventor 高江平胡海波夏才园高民欢
Owner CHANGAN UNIV
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