Warta Geologi, Vol. 46, No. 2, August 2020, pp. 88–93
Evaluation of tunnel interaction in Kenny Hill Formation
using Finite Element Modelling
Darvintharen Govindasamy1, Mohd Ashraf Mohamad
Ismail1,*, Mohd Faiz Mohammad Zaki1,2
1School of Civil Engineering, Universiti Sains
Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia
2School of Environmental Engineering, Universiti
Malaysia Perlis, Perlis Malaysia, Malaysia
* Corresponding author email address: ceashraf@usm.my
Abstract:
The number of town population growth is the reason for the expansion of
transportation and infra-structures in metropolitan cities. Due to that urban
tunnelling has turned out to be common in most area. Considering the
environmental impacts, going underground become a feasible choice for the
development of transportation. But, when dealing with urban tunnelling, one
always meet with complex mechanism due to soil interaction between ground and
tunnels. Tunnelling problem must be considered as a three-dimensional problem.
However, we can simulate the three-dimensional plane problem into a
two-dimensional plane problem by considering certain assumption which governs
the missing dimension. This paper is to show the simplified method for ground
settlement prediction of tunnelling excavation using the PLAXIS 2D software.
The two simplified methods are lining contraction and stress reduction method.
The comparison between these two methods is described in this paper in terms of
contraction ratio and unloading factor which can be used for tunnelling
problems. This study was done in the Kuala Lumpur Kenny Hill Formation
basically based on geotechnical data of Klang Valley Mass Rapid Transit (KVMRT)
system. Hardening soil model is choosen as the constitutive model for this
analysis because of its ability to represent the actual soil behaviour compared
to Mohr Coulomb Model. The effectiveness of simulation using these two methods
was verified with the monitored ground movement data. A relationship between
these two methods was formed as the outcome of the study.
Keywords:
Lining contraction, stress reduction, Kenny Hill Formation, hardening soil
model, tunnelling
DOI :
https://doi.org/10.7186/wg462202008
ISSN
0126–5539; e-ISSN 2682-7549
