A Soil Surface Freezing Prevention and Control System Based on Air Column Dispersion Heating

Abstract

The invention relates to an air column diffuse type heating based soil surface freezing prevention and control system. The system comprises a high-temperature air generator (1) generating hot air, a high-speed blower (2) conveying the hot air out through an air supply pipe (3) and a taper throat pipe (4) and a diffuse type air column (5) connected with an air outlet of the taper throat pipe (4); a heat-insulating film (6) is arranged on the upper portion of the diffuse type air column (5), a side air curtain (7) is arranged on the edge, far away from the soil surface, of the heat-insulating film (6), and the heat-insulating film (6) and the side air curtain (7) make the diffuse type air column (5) contained in the middle of an inner space formed by the heat-insulating film (6) and the side air curtain (7) and the soil surface; the diameters of the taper throat pipe (4) are gradually increased from an air inlet to the air outlet. Accordingly, a stable hot air layer is formed on the soil surface, and then the soil surface is heated by the hot air continuously; the heating efficiency is high, and the antifreezing effect is excellent. The system has the advantages of being convenient to install and implement, flexible to move, large in prevention and control area, low in construction cost and the like.

Description

technical field [0001] The invention relates to the technical field of prevention and control of soil surface freezing, in particular to a soil surface freezing prevention and control system based on air column diffuse heating. Background technique [0002] Seasonally frozen soil and permafrost are widely distributed in western my country and alpine regions, accounting for about 70% of China's total land area. In recent years, with the active promotion of the western development, road engineering, large-scale water conservancy and hydropower development projects, etc. have been gradually implemented in the western mountainous and plateau cold regions. As the water in the soil increases in volume during the freezing process, frost heaving forces are generated, forcing the relative displacement of soil particles, and thawing occurs after melting, which is likely to cause damage to structures. Therefore, during the implementation of these projects, roadbeds and The ramming of ...

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Problems solved by technology

However, these technical measures are all developed for anti-freezing problems such as transmission lines, tunnels and pipelines. Once the anti-freezing system is completed and put into operation, it is difficult to move and change, and these anti-freezing systems have complex structures, high engineering costs, and small anti-freezing ranges, which are difficult to meet. In road or dam projects, the protection of soil materials is huge, the construction work area is wide and changes at any time, and the expected prevention and control goals of soil materials and soil freezing on the working surface cannot be achieved.

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