Difference between Natural & Mechanical Ventilation in Tunnel Tunnel ventilation is a technique, that provides fresh air inside the tunnel and removes dust from the tunnel during and after construction. Following are the 6 difference between natural ventilation and mechanical ventilation in tunnel. Natural Ventilation 1. Natural ventilation is achieved by providing shaft at a …
Tunnel Lighting Various tunnelling work and operations can not be carried out successfully and satisfactorily if there is insufficient light in the tunnel. It is suggested that light with an intensity of 260 lumens per m2 in the working area is sufficient for proper effectiveness of tunnelling work. Following are the situation and locations which …
18 Safety Precautions in Tunnelling Tunnelling is an underground construction and there are many types of risk during construction. Therefore, it is essential to take measure to protect the workers against accident, sometimes fatal, are essential. Following are the 18 Safety Precautions in Tunnelling. 1. The floor of the tunnel should be kept dry and …
Maintenance of Railway Tunnels Generally, P.W.I. inspects every tunnel in his section, and he is personally responsible to maintain the track through tunnel in perfect running condition. Following points should be noted in connection with the maintenance of railway tunnels. 1. It should be noticed whether the structure of the tunnel has weakened, cracked or …
Classification of Tunnel Drainage System Tunnel Drainage systems are classified as: (1) Drainage system provided at the time of construction or temporary drainage system.(2) Drainage system provided in completed tunnels or permanent drainage system. (1) Temporary Drainage System This is provided to remove groundwater from the tunnel at the time of construction. In this system, …
Methods of Ventilation in Tunnels Following methods are implemented for ventilation in tunnels: Natural Method Mechanical Method 1. Natural Ventilation When a tunnel receives fresh air and automatically removes the dust without the use of mechanical appliances, this sort of ventilation is called natural ventilation. This type of ventilation can be improved by providing shaft …
Requirements of Good Ventilation System in Tunnels A good tunnel ventilation system should meet the following requirements: 1. It should reduce the dust produced by the tunnel activities to a safe limit. 2. It should quickly clear the fumes generated by blasting from the working face. 3. A good ventilation system should be such that, it can prevent …
