Risk assessment in tunnelling: Fault zone management

Marcher, T. (Speaker)

Activity: Talk or presentationTalk at workshop, seminar or courseScience to science


Geological uncertainties and the ensuing risks in the construction of long tunnels at great depth has been described in the ITA Report no. 4 - Long tunnels at great depth (ITA) [1]: “…. the deeper the tunnel, the larger the uncertainties; the higher the probability of encountering adverse or unforeseen conditions for tunnelling, the greater the effort and the cost for site investigations to reduce the uncertainties”. Among the identified hazard sources, faults play a dominant role due to their squeezing potential, swelling and creep, possible inflow of water (and/or gases) and debris, or eventual displacements along active shear zones. Tunnelling through fault zones may therefore lead to critical events for both the construction process and the safety of the personnel. In order to minimise the risk, to be prepared in the case of an event or to overcome fault zones efficiently, a Fault Zone Management Plan has been developed. This Fault Zone Management Plan provides a systematic process developed for the cross-border BBT (Brenner Base Tunnel) railway tunnel at great depth between Italy and Austria.
Period11 Dec 2019
Event titleUnderground Tunnelling for Substation Construction
Event typeCourse
LocationSelangor, Malaysia
Degree of RecognitionNational