Hydro Power and Railway Projects construction in Himalayan areas having fresh and weak formations where many tunnels were collapsed and work stopped due to lack of specialized handling of the weak zones.

Bumi through it’s expertise successfully salvaged T3 Railway tunnel & T80 Access tunnel under problems by use of special techniques & instrumentations:

Irrigation Twin Tunnel at Karnool district, AP collapsed due to geological condition.

Bumi through its expertise has stabilized the tunnel and helps to regain its original shape and strength by drilling and installing underground pipe roofing at crown periphery zone at 5° to 15° upward for the length of tunnel 150m.pressure grouting was done with pressure up to refusal in pipe roofing pipes.