Piston type active ventilation and temperature lowering device applicable to many-year permafrost embankment

Abstract

The invention discloses a piston type active ventilation and temperature lowering device applicable to many-year permafrost embankment, and belongs to the field of many-year permafrost embankment maintenance. The piston type active ventilation and temperature lowering device comprises a ventilation pipe, an air suction tube device, a hollow post, a wind chasing device and a wind energy conversiondevice, wherein the hollow post is fixed beside the embankment; the ventilation pipe is buried in the embankment; an air outlet is communicated with the air inlet end of the hollow post; the air suction tube device is arranged in the hollow post, and is positioned between the air inlet end and the wind energy conversion device; the wind energy conversion device and the wind chasing device are arranged at the two sides of the upper section of the hollow post. The piston type active ventilation and temperature lowering device solves the problems of a conventional ventilation pipe embankment thatthe ventilation efficiency is low; the blockage failure can easily occur; the installation mode is single; the applicable range is narrow; the conventional ventilation pipe embankment cannot be usedin the many-year permafrost field wide-breadth embankment.

Description

Technical field [0001] The invention belongs to the field of permafrost roadbed maintenance, and particularly relates to the maintenance of wide-width roadbeds on permafrost sites. Background technique [0002] Although the world has built railways in permafrost regions for nearly a hundred years, the disease rate of the current operating routes is still around 30%. For example, in Russia, the second Siberian railway built in the 1970s had a disease rate of 27.5% in 1994, and the first Siberian railway that had been in operation for nearly a hundred years had a disease rate of 40.5% in 1996. Northeast my country has a long-term freeze. The railway disease rate in the soil area reaches 40%. Due to the complexity of the things themselves, many thorny technical problems that have long plagued roadbed projects in permafrost areas have not yet been resolved, among which the settlement and deformation of roadbeds is the main disease of highway and railway projects. For example, the an...

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Problems solved by technology

[0011] The purpose of the present invention is to propose a piston-type active ventilation and cooling device suitable for permafrost subgrades, which solves the problem of low ventilation efficiency of traditional ventilation pipe subgrades, easy blockage failure, single installation mode, and narrow adaptable surface, which cannot be applied to permafrost subgrades. Problems with wide subgrades in soil sites, especially expressways, effectively control the subgrade settlement of high-temperature permafrost expressways

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