Internal circulation type solar heating device and anti-frost heaving method for subgrade

Abstract

The invention is applied to the technical field of subgrade engineering and provides an internal circulation type solar heating device for a subgrade. The axis of a metal heat collecting pipe is superposed with that of a glass tube; two ends of the metal heat collecting pipe and two ends of the glass tube are all connected by bellow expansion joints in a sealing manner; each of the two ends of themetal heat collecting pipe is respectively connected with a metal heat collecting pipe joint; the metal heat collecting pipe joints extend to the outer sides of the bellow expansion joints; the top end of a metal heat supply pipe is communicated with the metal heat collecting pipe joint at the bottom end of the metal heat collecting pipe through a threaded connector; a cone head guiding cap is arranged at the bottom end of the metal heat supply pipe; a circulating pump is driven by a solar cell to operate; an inlet of the circulating pump is communicated with the metal heat collecting pipe joint at the top end of the metal heat collecting pipe; an outlet of the circulating pump is communicated with an inlet of a circulating pipeline; an outlet of the circulating pipeline penetrates through the threaded connector and extends to the bottom of the metal heat supply pipe; the metal heat supply pipe and the metal heat collecting pipe are internally filled with heat transfer fluid. The problem of poor anti-frost heaving effect of the subgrade in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of roadbed engineering, and in particular relates to an internal circulation solar heating device for roadbed and a method for preventing frost heave of roadbed. Background technique [0002] Frozen soil refers to various rocks and soils that are below zero degrees Celsius and contain ice. In nature, frozen soil is divided into seasonal frozen soil and permafrost. Among them, seasonal frozen soil refers to the soil or loose rock layer that freezes in winter and thaws in spring. Permafrost refers to the soil and loose rocks that have been continuously frozen for many years, especially the seasonal frozen soil that is still frozen in the cold season and thawed in the warm season within a certain depth range in the permafrost area. Due to the volume difference between a certain mass of water in solid and liquid states, frost heave and thaw subsidence caused by freezing and thawing of water will be associated ...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides an internal circulation solar heating device for roadbeds and a roadbed anti-frost heave method to solve the problem of poor anti-frost heave effect of roadbeds in the prior art

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