Contingency plan for managing slope-related risks a case study for menora tunnel in malaysia
Loading...
Date
2018-06
Authors
Siti Najwa Abdullah
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Nowadays, the world is witnessing an ever-increasing need for tunnels because
of their unique characteristics and potential applications. However, tunnel is facing many
problems and risks such as safety, stability and environmental influence in excavation
and operation. Around the world, there have been serious failures in tunnel during
operation and maintenance stage and these cases have resulted in fatalities, damage to
property and other socio-economic consequences. The aim of this study is to identify the
potential slope-related risks and determine their risk ranking according to their priority
importance towards successful delivery of tunnelling projects. The selected case study
tunnelling project is Menora Tunnel which is located at Jelapang, Perak. Throughout the
study, the significant risks are identified and then ranked via the Analytic Hierarchy
Process (AHP) pairwise comparison, which analyses the criticality and importance of
each risk. Most of these risks are identified, quantified, minimized and prioritized to
minimize the consequences and their impact on certain projects. There are total five
slope-related risks have been identified. Amongst them, slope failure has the greatest
importance due to the event of sudden collapse of the slope, there are potential impacts
on highway tunnel users, thus resulting towards a higher fatality rate. Heavy rainfall will
affect the condition and reduce the strength of soil near to the tunnel. Therefore, a risk
contingency plan is needed to lessen the damage of all these risks when they occur.
Contingency plan is playing an important role as an adequate preparation in order to
make sure the planning will be respond quickly and effectively to a crisis situation when
it occurs. Without the plan in place, the full impact of the risk could greatly affect the
operation and maintenance of tunnel.