Roadbed ventilation prefabricated part in flexible splicing form

Abstract

The invention relates to a roadbed ventilation prefabricated component in a flexible splicing form, which comprises a concrete ventilation component, the concrete ventilation component is a hollow cube, ventilation holes are formed in the front, rear, left and right sides of the concrete ventilation component, and the ventilation holes are communicated with a middle cavity to form longitudinal andtransverse channels; a rubber outer wrapping layer is arranged outside the concrete ventilation component, and round holes are formed in the four faces. A plurality of concrete ventilation componentsare laid in the same plane, prestressed steel wire grouting ducts correspond to one another, and prestressed steel wires for connection are inserted to achieve longitudinal and transverse connection.The single prefabricated ventilation components are connected to form the longitudinally and transversely communicated overhead ventilation layer, and the prefabricated components are connected in aflexible buffer manner, so that the ventilation structure can adapt to uneven freeze-thaw deformation in permafrost regions, and ventilation ducts are kept unblocked.

Description

technical field [0001] The invention relates to the technical field of road subgrade construction, in particular to a prefabricated component for subgrade ventilation in the form of flexible splicing. Background technique [0002] Frozen soil refers to soil and rocks with negative temperature and ice, and is mainly divided into permafrost and seasonal frozen soil according to the survival time. The permafrost in my country is mainly distributed in the Qinghai-Tibet Plateau, the high mountains in the west, and the Greater and Lesser Khingan Mountains in the northeast, with a total area of ​​about 215×104km 2 , accounting for about 22.3% of my country's land area, is the world's third largest country with permafrost distribution. The average altitude of the Qinghai-Tibet Plateau is above 4500m. It is the main distribution area of ​​permafrost in my country, and the area of ​​permafrost is about 150×104km 2 , about 70% of the permafrost area in my country. Affected by global...

AI Technical Summary

Problems solved by technology

Practice has proved that the subgrade of ventilation pipes has the disadvantages of poor heat dissipation uniformity and poor regulation and control. In addition, traditional ventilation pipes are easily deformed due to permafrost thawing and settlement, resulting in a decrease in ventilation and cooling efficiency. In severe cases, the pipes are blocked and the ventilation capacity is lost.

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