Drainage of Tunnel | Necessity of Drainage of Tunnel | Classification of Drainage System of Tunnel

Drainage of Tunnel

The art of collection and removal of water entering the tunnels during and after their construction is known as drainage of tunnels.

If proper arrangements of drainage during construction are not adopted, the seepage water affects the tunnel.

Necessity of Drainage of Tunnel

1. An efficient drainage system is necessary during construction of tunnels to have more progress of work.

2. After the construction of tunnel is over, its drainage is also essential to reduce wear and tear of the communication route and to achieve more safety of the moving vehicle

Classification of Drainage System of Tunnel

1. Temporary drainage system

The drainage system provided during the construction of a tunnel is known as temporary drainage system. It can be provided by one of the following system.

a. Open ditch drainage system

b. Pumping system

2. Permanent drainage system

The drainage system provided after construction of tunnel us known as permanent drainage system. This type of drainage system can be provided by any one of the following method.

a. By providing central drain

b. By providing iron shed along with side drain

c. By providing side drain