Ventilation heating system for tunnels in high-altitude and cold regions as well as ventilation heating construction method

Abstract

The invention discloses a ventilation heating system for tunnels in high-altitude and cold regions as well as a ventilation heating construction method. The ventilation heating system comprises an axial-flow ventilator, an air pipe and a ventilation heating pipe for heating cold air introduced into a tunnel, wherein the ventilation heating pipe is mounted on the air pipe and comprises a round heating pipe, an air outlet and an air inlet; the round heating pipe comprises an outer steel pipe, an inner steel pipe and a ventilation heating device mounted in the inner steel pipe. The ventilation heating construction method comprises the following steps: 1, mounting the axial-flow ventilator; 2, excavating the tunnel and performing ventilation heating construction; adopting the axial-flow ventilator for press-in ventilation and adopting the ventilation heating pipe to heat the cold air introduced by the axial-flow ventilator in a tunnel excavating construction process. The ventilation heating system and the ventilation heating construction method have the advantages as follows: the design is reasonable, the construction is convenient, the use effect is good, and the problems of influence caused by proneness to collision on tunnel construction, poorer heating effect, failure in meeting the heating requirement in a low-temperature environment and the like when the existing tunnel environment heating method is adopted can be solved.

Description

technical field

[0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a ventilation and heating system and a ventilation and heating construction method for tunnels in high-altitude and cold regions. Background technique

[0002] During tunnel construction in low-temperature regions or high-altitude alpine regions with an average altitude of more than 2,600 meters (also known as plateau alpine regions), the construction impact caused by low temperature is more significant, which directly affects construction safety, quality and progress. Among them, the alpine region refers to the region with high altitude, perennial low temperature and permafrost that does not melt all the year round. At present, there are three main ways to raise the temperature of the tunnel environment commonly used in the tunnel construction process: First, boiler heating air heating technology, the principle is to use the boiler to heat up to provide h...

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