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Engineering Geological Mapping On Slope Design In The Mountainous Area Of Sabah Western, Malaysia.

The geology in the mountainous area of Sabah western provides a favourable setting for engineering geological instability. The area is underlain by the Trusmadi Formation (Palaeocene to Eocene age), the Crocker Formation (Late Eocene to Early Miocene age) and vary recent Quaternary alluvial material...

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Main Authors: Rodeano Roslee, Felix Tongkul
Format: Article
Language:English
Published: 2018
Subjects:
QE Geology
Online Access:https://eprints.ums.edu.my/id/eprint/23810/1/Engineering%20Geological%20Mapping%20On%20Slope%20Design%20In%20The%20Mountainous%20Area%20Of%20Sabah%20Western.pdf
https://eprints.ums.edu.my/id/eprint/23810/
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spelling my.ums.eprints.238102019-10-14T23:46:04Z https://eprints.ums.edu.my/id/eprint/23810/ Engineering Geological Mapping On Slope Design In The Mountainous Area Of Sabah Western, Malaysia. Rodeano Roslee Felix Tongkul QE Geology The geology in the mountainous area of Sabah western provides a favourable setting for engineering geological instability. The area is underlain by the Trusmadi Formation (Palaeocene to Eocene age), the Crocker Formation (Late Eocene to Early Miocene age) and vary recent Quaternary alluvial materials which are still being deposited. The argillaceous nature and intense deformation suffered by the Trusmadi Formation and the highly jointed sandstone and mudstone beds of the arenaceous Crocker Formation makes them highly susceptible to weathering and instability. The weathered materials are unstable and may experience sliding due to by high pore pressure and intensively of geomorphological processes. In this study, a total of 20 selected critical slope failures were studied and classified into two main groups; rock slope (ten) and soil slope (ten). Soil slope failures normally involved large volumes of failed material as compared much rock slopes, where the failures are mostly small to medium. Kinematics rock slope analyses indicates that the variable potential of circular, planar, wedges, and toppling failures modes as well as the combination of more than one mode of aforementioned failure. Rock and soil slopes stability analysis indicates that the factor of safety value as unsafe (0.56 to 0.95). The geological influence had transformed the slopes in the Sabah mountainous area to be highly unstable and susceptible to landslide occurrences. Six (6) related main parameters to the landslide occurrence in the study area were attributed; 1) local and regional geology, 2) hydrological and geohydrological, 3) mineralogical and micro structures, 4) local discontinuities structures, 5) physical and engineering properties of soil and rock, and 6) geomorphological processes which can help in evaluating landslide problems. Therefore, development planning has to consider the slope hazard and risk management. This engineering geological mapping may play a vital role in disaster risk reduction programme in Sabah to ensure the public safety and to be extend with different environment. 2018 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/23810/1/Engineering%20Geological%20Mapping%20On%20Slope%20Design%20In%20The%20Mountainous%20Area%20Of%20Sabah%20Western.pdf Rodeano Roslee and Felix Tongkul (2018) Engineering Geological Mapping On Slope Design In The Mountainous Area Of Sabah Western, Malaysia. Pakistan Journal of Geology (PJG), 2 (2). pp. 1-10. ISSN 2521-2915
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
topic QE Geology
spellingShingle QE Geology
Rodeano Roslee
Felix Tongkul
Engineering Geological Mapping On Slope Design In The Mountainous Area Of Sabah Western, Malaysia.
description The geology in the mountainous area of Sabah western provides a favourable setting for engineering geological instability. The area is underlain by the Trusmadi Formation (Palaeocene to Eocene age), the Crocker Formation (Late Eocene to Early Miocene age) and vary recent Quaternary alluvial materials which are still being deposited. The argillaceous nature and intense deformation suffered by the Trusmadi Formation and the highly jointed sandstone and mudstone beds of the arenaceous Crocker Formation makes them highly susceptible to weathering and instability. The weathered materials are unstable and may experience sliding due to by high pore pressure and intensively of geomorphological processes. In this study, a total of 20 selected critical slope failures were studied and classified into two main groups; rock slope (ten) and soil slope (ten). Soil slope failures normally involved large volumes of failed material as compared much rock slopes, where the failures are mostly small to medium. Kinematics rock slope analyses indicates that the variable potential of circular, planar, wedges, and toppling failures modes as well as the combination of more than one mode of aforementioned failure. Rock and soil slopes stability analysis indicates that the factor of safety value as unsafe (0.56 to 0.95). The geological influence had transformed the slopes in the Sabah mountainous area to be highly unstable and susceptible to landslide occurrences. Six (6) related main parameters to the landslide occurrence in the study area were attributed; 1) local and regional geology, 2) hydrological and geohydrological, 3) mineralogical and micro structures, 4) local discontinuities structures, 5) physical and engineering properties of soil and rock, and 6) geomorphological processes which can help in evaluating landslide problems. Therefore, development planning has to consider the slope hazard and risk management. This engineering geological mapping may play a vital role in disaster risk reduction programme in Sabah to ensure the public safety and to be extend with different environment.
format Article
author Rodeano Roslee
Felix Tongkul
author_facet Rodeano Roslee
Felix Tongkul
author_sort Rodeano Roslee
title Engineering Geological Mapping On Slope Design In The Mountainous Area Of Sabah Western, Malaysia.
title_short Engineering Geological Mapping On Slope Design In The Mountainous Area Of Sabah Western, Malaysia.
title_full Engineering Geological Mapping On Slope Design In The Mountainous Area Of Sabah Western, Malaysia.
title_fullStr Engineering Geological Mapping On Slope Design In The Mountainous Area Of Sabah Western, Malaysia.
title_full_unstemmed Engineering Geological Mapping On Slope Design In The Mountainous Area Of Sabah Western, Malaysia.
title_sort engineering geological mapping on slope design in the mountainous area of sabah western, malaysia.
publishDate 2018
url https://eprints.ums.edu.my/id/eprint/23810/1/Engineering%20Geological%20Mapping%20On%20Slope%20Design%20In%20The%20Mountainous%20Area%20Of%20Sabah%20Western.pdf
https://eprints.ums.edu.my/id/eprint/23810/
_version_ 1760230157763739648
score 13.211869

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