What is closed-face tunnelling
What is closed-face tunnelling
(OP)
Q1) What is a closed-face tunnelling?
So far I know open-face tunnelling is the tunnel face of the ground being excavated will stand up with no support for a short period of time.
There is few common method to tunnel that i know:
1) TBM (Tunnel boring machine)
2) NATM (New Austrian Tunnelling method)
3) EARTH PRESSURE BALANCED MACHINE (EPBM)
Q2) So these method can be constructed in open-face or closed faced?
So far I know open-face tunnelling is the tunnel face of the ground being excavated will stand up with no support for a short period of time.
There is few common method to tunnel that i know:
1) TBM (Tunnel boring machine)
2) NATM (New Austrian Tunnelling method)
3) EARTH PRESSURE BALANCED MACHINE (EPBM)
Q2) So these method can be constructed in open-face or closed faced?





RE: What is closed-face tunnelling
a full face shield covers the entire working face. Excavated material is removed by augers or as a slurry automatically. no personal can enter the excavation area. It includes both TBM and EPBM as well as others
RE: What is closed-face tunnelling
Richard A. Cornelius, P.E.
WWW.amlinereast.com