Composite temperature controlled ventilation roadbed

Abstract

Construction features of roadbed are as follows: building vent-pipes perpendicular to direction of roadbed in certain depth of road embankment; installing ventilating units of automatic controlling temperature at end part of vent-pipe; setting up thermal-protection material between vent-pipes / entire up part of vent-pipes with earth material being covered and tamped. The said automatic controlling ventilating units carries out heat exchange between inside roadbed and airflow in low temperature outside. The thermal-protection material protects ever frost effectively. Thus, the invention prevents frost heave and thaw collapse caused by season change so as to keep stability of roadbed in high level. The invention solves issue of carrying construction in zone of frozen earth.

Description

technical field

[0001] The invention relates to a mode for effectively protecting the permafrost at the subgrade of roads and the permafrost at the bottom of building foundations and improving the stability of engineering buildings during the construction of railways, highways and engineering buildings in permafrost regions. Background technique

[0002] The freezing and thawing of the soil creates a unique cold-growing phenomenon and natural landscape. Human activities actively participate in this effect, creating a fragile ecological environment that is co-developing under this unique environment. This special cold environment is called For permafrost environment. Because the thick layer of subsurface ice contained in permafrost is in a fragile state of thermal balance, human engineering activities can easily induce the melting of thick subsurface ice and changes in the permafrost environment, which have an important impact on the stability of engineering buildings. The Q...

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