Tunnels

Difference between Natural & Mechanical Ventilation in Tunnel

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 …

Classification of Tunnel Drainage System

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

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 …