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Sains Malaysiana 48(11)(2019): 2595–2604
http://dx.doi.org/10.17576/jsm-2019-4811-29
Rock Slope Stability Analysis based
on Terrestrial LiDAR on Karst Hills in Kinta Valley Geopark,
Perak, Peninsular Malaysia (Analisis Kestabilan Cerun Batuan berdasarkan LiDAR Daratan di Bukit Batu Kapur Geotaman Lembah Kinta, Perak, Semenanjung
Malaysia) MUHAMMAD AFIQ
ARIFF
HELLMY1,
ROS
FATIHAH
MUHAMMAD1*,
MUSTAFFA
KAMAL
SHUIB1,
NG
THAM
FATT1,
WAN
HASIAH
ABDULLAH1,
AISHAH
ABU
BAKAR2
& RALPH KUGLER1 1Department of Geology,
Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Federal
Territory, Malaysia 2Department of Civil
Engineering, Faculty of Engineering, University of Malaya, 50603
Kuala Lumpur, Federal Territory, Malaysia Received: 20 April
2019/Accepted: 15 August 2019 ABSTRACT The use
of modern mapping technology is necessary in assessing slopes and
cliffs, especially in tropical countries as it is mostly inaccessible
and covered with thick vegetation which restricts the conventional
data collection to only at the base of the cliff. Overhanging and
sub-vertical characteristics of tropical karst hills in Kinta Valley
together with highly fractured and day-lighting joints increase
the possibility of rock slope failure. The problem statement of
this research is how Terrestrial Laser Scanning (TLS)
can assist the traditional survey in slope characterization. The
main objective of this research was to assess the stability of the
limestone hills in Kinta Valley based on the output provided by
terrestrial LiDAR and scanline survey method. TLS helps engineers and geologists to collect a high number
of discontinuity data where it is inaccessible for manual compass
data measurement. A total number of about 13 cliffs on 4 limestone
hills were assessed. Gunung Lang and Kek
Lok Tong show major potential failure
trending towards east, Gunung Lanno
towards southwest, Kwan Yin Tong towards west, and Gunung
Cheroh with three directions of failure
which are pointed towards the south, southwest and southeast direction.
The overall results showed that the orientation of the major joint
sets and the direction of the failure greatly influence the karst
hills morphology in the Kinta Valley. The integration of LiDAR method
with the manual compass clinometer has become a better approach
to assess the stability of limestone hills and other rock slope
in the possible future. Keywords:
Limestone hills; slope stability; terrestrial laser scanning ABSTRAK Penggunaan teknologi pemetaan moden ialah satu
keperluan dalam
menilai cerun dan
tebing terutamanya
di negara tropika kerana kebanyakan kawasannya tidak boleh diakses dan
diliputi oleh
tumbuhan yang tebal yang mengehadkan pengumpulan data secara konvensional yakni pada bahagian
bawah cerun
sahaja. Ciri gunung
batu kapur tropika yang curam dan sub-menegak di Lembah Kinta bersama dengan retakan teruk dan satah
yang mengarah keluar
dari cerun meningkatkan
kecenderungan kegagalan
cerun batuan. Pernyataan
masalah kajian
ini adalah bagaimana
LiDAR daratan boleh
membantu tinjauan tradisi dalam pencirian
cerun. Objektif
utama penyelidikan ini adalah untuk
menilai kestabilan
gunung batu kapur
di Lembah Kinta berdasarkan
output yang disediakan oleh
LiDAR daratan dan
kaedah tinjauan garis imbasan. Imbasan laser terestrial laser (TLS)
membantu jurutera
dan ahli geologi
mengumpul data ketakselanjaran
dalam bilangan
yang tinggi di kawasan yang tidak dapat diakses
untuk pengukuran
data secara manual oleh kompas klinometer. Sebanyak tiga belas
cerun daripada
empat gunung batu
kapur telah
dinilai. Gunung Lang dan Kek Lok
Tong menunjukkan tren
jatuhan ke arah
timur, Gunung
Lanno ke arah
barat daya,
Kwan Yin Tong ke arah barat
dan Gunung Cheroh ke arah
selatan, barat
daya dan tenggara.
Keputusan keseluruhan
menunjukkan orientasi utama kekar dan
arah jatuhan
batuan mempengaruhi morfologi gunung karst di Lembah Kinta. Integrasi LiDAR dan kompas klinometer
secara manual merupakan
pendekatan yang baik untuk menilai kestabilan
gunung batu
kapur dan cerun
batuan lain pada
masa hadapan. Kata kunci: Bukit batu
kapur; imbasan
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