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Composite temperature controlled ventilation roadbed

A technology for roadbeds and ventilation pipes, applied in the field of composite temperature-controlled ventilation roadbeds, can solve problems such as irreparable problems and loss of heat pipe efficiency, and achieve the effects of protection stability, avoiding temperature rise, and accurate action

Inactive Publication Date: 2006-01-04
COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the heat pipe is buried inside the embankment, once the working fluid in the heat pipe leaks, the loss of heat pipe efficiency will not be repaired

Method used

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  • Composite temperature controlled ventilation roadbed
  • Composite temperature controlled ventilation roadbed
  • Composite temperature controlled ventilation roadbed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, a kind of composite temperature control ventilation subgrade, is made of automatic temperature control ventilation device 1 (self-made, has applied for Chinese invention patent, application number is 03114640.6, 03114641.4), cement ventilation pipe 2, polystyrene (EPS) board, Composition of earth and stone. The ventilation pipe 2 is perpendicular to the direction of the roadbed and buried in the lower part of the embankment fill. An automatic temperature control ventilation device 1 is installed at its end.

[0035] When the outside temperature is lower than 0°C, the damper 4 of the automatic temperature control ventilation device 1 will automatically open, so that the internal soil of the embankment and the foundation will conduct convective heat exchange with the outside cold air through the ventilation pipe 2; when the outside temperature is higher than 0°C , the damper 4 of the automatic temperature control ventilation device 1 is automatically closed ...

Embodiment 2

[0038] Embodiment 2, the ventilation pipe 2 is buried at a certain depth of embankment fill, and the automatic temperature control ventilation device 1 is installed at its end, and the injection-molded polystyrene (XPS) insulation board is laid between the ventilation pipes, and its heat insulation and cooling Effect is identical with embodiment 1.

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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 areas. 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 Qin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D27/35E01C3/06
Inventor 俞祁浩程国栋牛富俊邓友生
Owner COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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