Long Tunnel Construction Period Of Air Quality Control Measures And Research

The 21st century is the development of underground space in the century, the century of sustainable development, and construction of the tunnel is an important part of underground engineering, environmental protection is essential. At the same time for any civil engineering, safety is always the first one, good construction environment is to ensure that the necessary conditions for construction safety. The papers will be built up in the rail tunnel to study, investigate tunnel construction site in the air quality of the environment, conditions and circumstances to allow the major air pollutants on-site sampling, monitoring and analysis. Long Tunnel ventilation problem is the construction of the tunnel has always been a problem of concern to the people, the paper will also choose from a tunnel ventilation perspective of how to improve air tunnel construction environmental conditions.Construction of underground caverns very complex, operating side, drilling, blasting, and with Java, transport, spray anchor supporting secondary lining parallel processes such as multi-channel operations, the construction of harmful substances not only after the gas explosion , and Slag with mechanized equipment, vehicles, and other emissions from gas, gas, concrete operations, such as the dust. To create a good working environment, the protection of the health and safety of staff and maintain the normal operation of mechanical equipment to ensure the progress of the projects must be carried out inside the construction site good ventilation, change the chemical composition of the air inside the tunnel, reducing harmful gas composition concentration. This paper will be mainly construction of the tunnel of the harmful gas composition and its ways.Ventilation technology is constraining growth and the construction of the tunnel tunnel can be completed successfully operating one of the key factors, and rapid construction of the tunnel it is the main factor. Construction of the tunnel ventilation is adequate supply of fresh air inside, diluted emission of harmful gases, reduce dust concentration, in order to ensure the health of workers and construction safety, and improve operational efficiency. Tunnel ventilation can be divided into wind tunnel ventilation pipe ventilation. This paper will be linked to specific examples of tunnel construction, how to choose the ventilation reasonable approach that we can play the best environmental effects.