Reinforced ventilating heat-proof foundation

Abstract

The invention discloses a strengthening ventilation heat-insulation roadbed, characterized in that compacting sand-gravel-soil cushion is set on the compacting native surface; transverse concrete air ducts through wall with automatic air door controlled by temperature are set on the sand-gravel-soil cushion in a certain distance; crushed stone layer is set between air ducts through wall and above them; earthwork cloth is put on the horizontal crushed stone layer; heat insulation material is set on the earthwork cloth; and compacting embankment fill is filled on the heat insulation material. In the invention air ducts through wall are set in the crushed stone layer. In winter, by using lower temperature in frozen earth area and bigger wind speed through permeable hole of air duct the effect of convective cooling of air in the crushed stone layer is strengthened and there is strong ventilation cooling effect in air duct through wall itself. Two are combined with each other and are used by each other to decrease the temperature of frozen soil under the roadbed. In summer, the heat insulation material, the crushed stone layer and air duct through wall with air door controlled by temperature can play a role of thermal screen effect so as to prevent heat energy entering into embankment. At last storing cooling energy to the utmost is achieved; the temperature of frozen soil is decreased, the melting of frozen soil is avoided and the stability of embankment of frozen soil is ensured.

Description

technical field [0001] The invention relates to a road structure in a high-temperature permafrost region, in particular to an enhanced ventilation and heat insulation subgrade structure utilizing natural cold energy for ventilation through ventilation pipes, ventilation with crushed stones and heat insulation with thermal insulation materials. This roadbed structure utilizes the ventilation of the through-wall ventilation pipe, the enhanced ventilation of the through-wall hole, the thermal diode of the crushed stone layer and the heat insulation effect of the thermal insulation material to effectively reduce the temperature of the frozen soil at the lower part of the roadbed, prevent the frozen soil from melting, and improve the temperature of the frozen soil. Stability of soil subgrade. Background technique [0002] Most roadbeds in permafrost regions are built on a large amount of thick underground ice. With the impact of global warming and human activities, the temperatu...

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Problems solved by technology

[0004] Aiming at the complex and special geological conditions of roads in permafrost areas in my country in high-temperature permafrost sections, and solving the problem of freezing and thawing of permafrost at the lower part of embankments, the invention provides a roadbed with enhanced ventilation and heat insulation

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