Self-circulation frost heaving prevention heat gathering device and roadbed thereof

Abstract

The invention provides a self-circulation frost heaving prevention heat gathering device and a roadbed thereof, and relates to the technical field of disease prevention and control of engineering construction in a seasonal frozen soil region. The self-circulation frost heaving prevention heat gathering device comprises a solar heat absorption box, a circulation power unit and a heat gathering pipe which sequentially communicate end to end through a circulation pipe to form a circulation loop, the circulation loop is filled with a circulation working medium, and the heat gathering pipe is used for being inserted into the roadbed and transferring heat of the circulation working medium into the roadbed. Therefore, the solar heat absorption box absorbs solar radiation energy and converts the solar radiation energy into internal heat energy to heat the circulation working medium. The circulation power unit pushes the heated circulation working medium to flow to transfer heat. The heat gathering pipe continuously releases heat in the roadbed to heat a soil body around the heat gathering pipe, so that the roadbed is always in the process of net heat absorption and continuous accumulation of internal heat, the internal heat of the roadbed is collected, the temperature is always kept in a positive temperature state, and the purpose of preventing and treating engineering diseases such as roadbed soil body freezing and roadbed frost heaving is achieved.

Description

technical field [0001] The invention relates to the technical field of engineering construction disease prevention and control in seasonally frozen soil regions, in particular to a self-circulating anti-frost expansion heat-gathering device and a roadbed thereof. Background technique [0002] my country's seasonally frozen soil area is about 5.137 million square kilometers, accounting for 53.5% of the country's land area. Seasonally frozen soil is affected by the seasons, freezing in winter and thawing in summer. When the seasonally frozen layer and the seasonally melted layer melt in summer, due to the uneven distribution of the ice layer and ice lens, the uneven settlement of the soil layer is formed, which is an important reason for the deformation and destruction of various buildings. The characteristics of frost heaving and thawing settlement of seasonal frozen soil have a great influence on the project. Therefore, engineering buildings or projects in seasonally froze...

AI Technical Summary

Problems solved by technology

However, there is still a lack of research on the development characteristics and distribution of freeze-thaw engineering diseases under special conditions such as high water level, coarse fill, and strong freeze-thaw in the Xige section of Qinghai-Tibet Railway.

The methods used in conventional areas, such as replacement of subgrade bed soil, construction of drainage facilities to reduce water content of subgrade bed, inorganic binder stabilized soil insulation method, artificial salinization of subgrade soil, chemical grouting, waterproof curtain and other methods, are applied in such areas. Due to the constraints of engineering conditions such as normal train running and uninterrupted construction, as well as the cracking of the disposal site caused by the strong freezing and thawing of the soil, and the difficulty in sealing the entire lower part of the subgrade, these methods are difficult to meet the actual engineering needs.

Due to the weak previous research on engineering measures for this type of engineering disease remediation, engineering problems have long affected the stability of the subgrade and operational safety

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