Hot bar roadbed and construction method for controlling seasonal frost damage

Abstract

The invention discloses a hot bar roadbed for controlling seasonal frost damage, which comprises a water permeable layer, an impermeable layer, a roadbed and a hot bar; The roadbed, the impermeable layer and the permeable layer are laid from bottom to top in turn; The roadbed is provided with a hot bar mounting hole; The hot bar is arranged in the hot bar mounting hole; The hot rod is an airtighthollow structure, and the airtight hollow structure is provided with liquid ammonia. The invention provides a hot bar roadbed and a construction method for controlling seasonal frost damage, which isused for controlling and eliminating the generation and development of seasonal frost damage of roadbed, and ensuring the stability of roadbed and the safety of operation in low temperature season.

Description

technical field [0001] The invention relates to the technical field of roadbed construction, in particular to a thermal rod roadbed and a construction method for controlling seasonal freezing damage. Background technique [0002] During the operation of existing railways in most low-temperature areas in northern my country, the roadbed of the railway, especially the cutting section, is prone to bulge upwards, resulting in local uneven lifting of the track. When the lifting amount exceeds the limit for maintaining the safe operation of the train , will directly endanger driving safety. As the temperature rises, the rise of the subgrade at low temperatures will sink at high temperatures. When the sinking exceeds a certain limit, it will also pose a threat to the safe operation of the railway. This is the technical problem of seasonal freezing damage of railway subgrade in public works maintenance and management; this phenomenon not only exists in railways, but also in highways...

AI Technical Summary

Problems solved by technology

This is the technical problem of seasonal freezing damage of railway subgrade in public works maintenance and management; this phenomenon not only exists in railways, but also in highways, which has a great impact on transportation safety, road surface damage, shortened service life, Subsequent maintenance will also delay a lot of manpower and material resources; once subgrade frost damage occurs in low temperature seasons, the maintenance department can only adopt the method of digging and adding ballast during frost heaving and thawing to adjust the smoothness of the track surface to maintain vehicle safety Passed, this is a commonly used temporary maintenance method, often very passive; there is also a method of subgrade replacement to deal with freezing damage, part of the replacement effect is not obvious, and the practicability of all replacement is poor, this method needs to abolish the original subgrade and rebuild , the construction requires interruption of traffic, which is time-consuming and laborious, and causes relatively large economic losses. This is often not adopted on busy transportation routes, unless it is absolutely necessary

There is also a method of using vertical lime-soil piles or sand piles to control the freezing damage of the subgrade, but this method requires road occupation construction, and the long-term effect will be worse, so it is rarely adopted

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