Geological Behavior (GBR)

TUNNEL SUPPORT BY ROCK QUALITY INDEX (Q) SYSTEM FOR ULTRABASIC ROCK : A CASE STUDY IN TELUPID, SABAH, MALAYSIA

TUNNEL SUPPORT BY ROCK QUALITY INDEX (Q) SYSTEM FOR ULTRABASIC ROCK : A CASE STUDY IN TELUPID, SABAH, MALAYSIA

ABSTRACT

TUNNEL SUPPORT BY ROCK QUALITY INDEX (Q) SYSTEM FOR ULTRABASIC ROCK : A CASE STUDY IN TELUPID, SABAH, MALAYSIA

Journal: Geological Behavior (GBR)
Author: Ismail Abd Rahim and Mohamad Saiful Nizam Mohamad

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.02.2019.01.05

The study area is underlain by the ultrabasic rock of partly Sabah Ophiolite Complex of Cretaceous ages. The objectives of this study are to determine the Q-value and to estimate the permanent support measures for 20m span, 10m high and eastern direction of the proposed tunnel in the study area. Engineering geological mapping (lithological and surface mapping and discontinuity survey), laboratory study (petrographical study) and testing (Uniaxial Compressive Strength testing) and data analysis (stereographic plots, Q system parameters evaluation and support estimation) was used in this study. The results shows that the rock mass is classified as lherzolite, strong, excellent quality, more than four joint sets, slightly altered discontinuity wall, dry excavation and favourable stress condition. The equivalence dimension (De) are 15.4 for the permanent roof. The Q-value for permanent roof and wall of the proposed tunnel are 1.4 (Class D or poor and type 5) and 3.5 (Class D or poor and type 3), respectively. The permanent and temporary supports for the roof and wall are systematic bolting, 700J energy absorption of fiber reinforce sprayed concrete, 9-12 and 5-6 cm thick fiber reinforce shotcrete, respectively.
Pages 01-05
Year 2019
Issue 2
Volume 3

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BEHAVIOUR OF CHANNELISED DEBRIS FLOW IN THE CROCKER RANGE OF SABAH, MALAYSIA: A CASE STUDY AT ULU MOYOG, PENAMPANG

ABSTRACT

BEHAVIOUR OF CHANNELISED DEBRIS FLOW IN THE CROCKER RANGE OF SABAH, MALAYSIA: A CASE STUDY AT ULU MOYOG, PENAMPANG

Journal: Geological Behavior (GBR)
Author: Edgar Jr. Joe, Felix Tongkul, Rodeano Roslee

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.01.2019.28.32

Debris flow remains as a damaging natural hazards in the Crocker Range of Sabah, Malaysia. This is due to the fact that it can move at high velocity and longer travel distance, bringing big volume of sediment. One of the most severely affected area due to debris flow in the Crocker Range is that at Jalan Penampang-Tambunan KM 38.80 in Ulu Moyog situated in the district of Penampang. Recurring events of the debris flow from the year 2012 until 2014 have rendered the major road trunk between the west coast and interior region of the state impassable to traffic for hours. Nevertheless, the study on its behaviour in terms of velocity, discharge, and travel distance is still limited to the best knowledge of the authors. Therefore, the objective of this study is to identify the behaviour of the local case of channelised debris flow at Jalan Penampang-Tambunan KM 38.80. Based on site inspection along the channel and computation of flow behaviour by using established equation, the study finds that the velocity, discharge, and travel distance are controlled by the various channel parameters such as the elevation, width, depth, and longitudinal gradient.
Pages 28-32
Year 2019
Issue 1
Volume 3

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MIDDLE MIOCENE WAVE INFLUENCED TIDAL DOMINATED LAMBIR FORMATION, MIRI, SARAWAK: CASE STUDY IN TUSAN BEACH AND LAMBIR HILL

ABSTRACT

MIDDLE MIOCENE WAVE INFLUENCED TIDAL DOMINATED LAMBIR FORMATION, MIRI, SARAWAK: CASE STUDY IN TUSAN BEACH AND LAMBIR HILL

Journal: Geological Behavior (GBR)
Author: Muhd Nur Ismail Abdul Rahman and Sanudin Tahir

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.01.2019.20.27

The Middle Miocene sedimentary faciess classified as the Lambir Formation at Tusan Beach and Lambir Hill is revealed as tide dominated with exposed minor wave regimes association. Evidence of wave dominated facies is displayed mostly on shoreline deposits, such as planar cross stratified (PcS), swaley cross stratified (ScS), swaley-Hummocky cross stratified (SHcS) and hummocky cross stratified (HcS). The facies analysis reveals four facies associations, namely; foreshore facies association, upper shoreface, middle shoreface and lower shoreface. Whereas, tide dominated regime resulted three major facies association: tidal sand bar (TSB) facies association, tidal sand flat facies association (TSF) and subtidal mud flat (SMF). TSB facies association was developed from tide influenced shoreline that represented by herringbone cross stratified sandstone bed. The occurrence of herringbone cross stratified and other tidally structures within same facies explain that the current activities are in reversal process (flood and ebb). TSF and SMF facies associations, are widely distributed in the central Miri region including part of Lambir Hill and the Nakat River area. Wide exposure of frequent heterolitic beds, suggest that the Lambir Formation was deposited within the tidal flat environment.
Pages 20-27
Year 2019
Issue 1
Volume 3

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CORRELATION OF MICROSTRUCTURE CHARACTERISTICS WITH THE SLOPE STABILITY AT TRUSMADI FORMATION, SABAH, MALAYSIA

ABSTRACT

CORRELATION OF MICROSTRUCTURE CHARACTERISTICS WITH THE SLOPE STABILITY AT TRUSMADI FORMATION, SABAH, MALAYSIA

Journal: Geological Behavior (GBR)
Author: Rodeano Roslee

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.01.2019.17.19

This study focuses on the influence of weathered rock’s microstructure and its effect to the stability of slope at the Trusmadi Formation. Trusmadi Formation (Palaeocene to Eocene age) had experience a slightly metamorphism process and makes it highly susceptible to instability. Regional metamorphism that happened during tertiary has given rise to the formation of argillaceous rock. This rock then suffering a weathering process that change them to soil. Four samples were collected based on fail slope and stable slope. These samples were analysed using polarizing microscopic and scanning electron microscopic (SEM). Microstructural features identified that all slopes had the same platy minerals and mineral grain size and shape except for the cracks and porosity percentage. Percentage of cracks and porosity in stable slope are 35% and 40% in the average while 55% and 65% in fail slope. For SEM study, the percentage of porosity is 37% for stable slope and 55% for fail slope. The presence of 1:1 clay that is kaolinite gives only a small impact to slope stability.
Pages 17-19
Year 2019
Issue 1
Volume 3

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GIS Application for Comprehensive Spatial Soil Erosion Analysis with MUSLE Model in Sandakan Town Area, Sabah, Malaysia

ABSTRACT

 

GIS Application for Comprehensive Spatial Soil Erosion Analysis with MUSLE Model in Sandakan Town Area, Sabah, Malaysia

Journal: Geological Behavior (GBR)
Author: Rodeano Roslee, Kawi Bidin, Baba Musta, Sanudin Tahir, Felix Tongkul, Mohd Norazman Norhisham

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.01.2017.01.05

Soil erosion is one of the principal causes of soil degradation in Sandakan, Sabah, Malaysia. The natural phenomenon of erosion is now accelerated by human activities that alter the natural mechanisms. This acceleration is caused by destruction of plant cover, the growing of wrong cultivations, unsuitable farming techniques etc., all of which may be prevented with correct management and land planning. Soil erosion has been identified as one of the important environmental issues and therefore, detail assessment on prediction of soil loss and its impacts has been carried out using the application of the Modified Soil Loss Equation (MUSLE) and Geographical Information System (GIS). ARC-INFO was used for the storage of the data layer on each factor controlling soil erosion. Identification of potential high-risk erosion areas was made using a thematic data layering approach to analyze risk areas. The quantitative soil loss (t ha-1 yr-1) ranges estimates by MUSLE model by a spatial information analisis approach (GIS) were computed: (a) Very High risk (>150 tons/ha/year); (b) High risk (100-150 tons/ha/year); (c) Moderate risk (50-100 tons/ha/year); (d) Low risk (10-50 tons/ha/year); and (e) Very low risk (<10 tons/ha/year). About 46.33% of the area was classified as very low, 43.50% as low, 5.23% as moderate, 4.49% as high and 0% as very high. Soil erosion hazard has been identified and found to be significant in areas with slope above 36.96o. All findings showed that integration of GIS can be used for spatial analysis in a large scale. Production of A total value maps can be applied to particular development planning areas especially for housing and agriculture developments.
Pages 01-05
Year 2017
Issue 1
Volume 1

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Landslide Susceptibility Analysis (LSA) using Deterministic Model (Infinite Slope) (DESSISM) in the Kota Kinabalu Area, Sabah, Malaysia

ABSTRACT

 

Landslide Susceptibility Analysis (LSA) using Deterministic Model (Infinite Slope) (DESSISM) in the Kota Kinabalu Area, Sabah, Malaysia

Journal: Geological Behavior (GBR)
Author: Rodeano Roslee, Norbert Simon, Felix Tongkul, Mohd. Norazman Norhisham & Mohd. Radzif Taharin

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.01.2017.06.09

A practical application for landslide susceptibility analysis (LSA) based on two dimensional deterministic slope stability (infinite slope model) (DESSISM) was used to calculate factor of safety (FOS) and failure probabilities for the area of Kota Kinabalu, Sabah. LSA is defined as quantitative or qualitative assessment of the classification, volume (or area) and spatial distribution of landslides which exist or potentially may occur in an area. In this paper, LSA value can be expressed by a FOS, which is the ratio between the forces that make the slope fail and those that prevent the slope from failing. An geotechnical engineering properties data base has been developed on the basis of a series of parameter maps such as effective cohesion (C’), unit weight of soil ,)(depth of failure surface (Z), height of ground water table (Zw), Zw/Z dimensionless (m), unit weight of water ,)w(slope surface inclination (β) and effective angle of shearing resistance (). Taking into consideration the cause of the landslide, identified as groundwater change, the maximum groundwater level recorded corresponding to the actual situation of the most recent landslide is considered in this study. The highest probability value of the various scenarios was selected for each pixel and final LSA map were constructed. It has been found from this study that β and Zw parameters have the higher influence on landslide instability. The result validation between the examined LSA map and result of landslide distribution map (LDM) were evaluated. This DESSISM had higher prediction accuracy. The prediction accuracy is 84%. The resulting LSA maps can be used by local administration or developers to locate areas prone to landslide area, determine the land use suitability area and to organize more detailed analysis in the identified “hot spot” areas.
Pages 06-09
Year 2017
Issue 1
Volume 1

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Kampung Mesilou landslide: The controlling factors

ABSTRACT

Kampung Mesilou landslide: The controlling factors.

Journal: Geological Behavior (GBR)
Author: Ismail Abd Rahim, Lee Kiun You & Nabila Mohd Salleh

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.01.2017.19.21

This landslide study was conducted in Kampung Mesilou, Kundasang. Desk study, field study and data analysis used were based on recorded slides occurred in 2008, July 2013, November 2013 and June 2015. These episodic landslides have significant impact on road, concrete bridge, vegetable gardens and killed a farmer. Factors that control the slides are natural and anthropogenic activities. The natural factors include geological characteristics, weathering, excessive precipitation and natural river phenomena. Human activity is represented by unguided cutting slope for development purposes. The geological factor consists of unconsolidated Pinosuk Gravel rock unit, topography and occurrence of active northeast-southwest fault zone crossing this area. High weathering rate has weakening the underlying rock unit as well as heavy precipitation. Intermittently high energy during storm of the main river channel of Mesilou River has been increasing the rate of erosion at slope base since few decades. Natural slope was steepened during road construction and become less stable. Slope stability analysis has confirmed the slope is unstable with FOS < 1, especially during rainy session.
Pages 19-21
Year 2017
Issue 1
Volume 1

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APPLICATION OF GSI SYSTEM FOR SLOPE STABILITY STUDIES ON SELECTED SLOPES OF THE CROCKER FORMATION IN KOTA KINABALU AREA, SABAH

ABSTRACT

 

APPLICATION OF GSI SYSTEM FOR SLOPE STABILITY STUDIES ON SELECTED
SLOPES OF THE CROCKER FORMATION IN KOTA KINABALU AREA, SABAH

Journal: Geological Behavior (GBR)
Author: Lee Kiun You & Ismail Abd. Rahim

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.01.2017.10.12

This study was conducted on two selected slopes in Kota Kinabalu area of Sabah. The area is underlain by Crocker Formation which consisting of interbedded sandstone and shale layers. The objectives of this study are to determine the Geological Strength Index (GSI) rating, rock mass properties and slope stability for the selected slopes. Engineering geological mapping and discontinuity survey were conducted to obtain quantitative description of discontinuities as well as rock sampling based on grain sizes. GSI rating and disturbance factor was obtained from discontinuity survey and field observation on the slope face, respectively. Residual GSI rating was determined using empirical method. Laboratory study was done to determine the Uniaxial Compressive Strength via point load test and unit weight by dry density test along with the intact rock constant. Rock mass properties such as cohesion, friction angle, tensile strength, Young’s modulus and residual strength were determined by applying GSI system into the Hoek-Brown criterion. Kinematic analysis and finite element analysis were conducted to identify localised mode of failure and the safety factor of the selected slopes. Prescriptive measures were used to determine the rock cut slope designs. GSI rating for both slopes were obtained with both slopes can be considered as stable according to kinematic analysis and finite element analysis. Prescriptive measures for slope protection are needed to prevent water pressure build up and future failure.
Pages 10-12
Year 2017
Issue 1
Volume 1

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GEOCHEMICAL CHARACTERIZATION OF SEDIMENTS AROUND NUKAKATAN VALLEY, TAMBUNAN, SABAH

ABSTRACT

 

GEOCHEMICAL CHARACTERIZATION OF SEDIMENTS AROUND NUKAKATAN VALLEY, TAMBUNAN, SABAH

Journal: Geological Behavior (GBR)
Author: Hennie Fitria Wulandary Soehady Erfen, Junaidi Asis, Muhammad Abdullah, Baba Musta, Sanudin Tahir, Hazerina Pungut & Mohamed Ali Yusof Mohd Husin

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.01.2017.13.15

The objective of this paper is to assess the concentration and toxicity level of selected heavy metals in sediments from Nukakatan Valley, Tambunan, Sabah. In this study 13 soil samples were collected from different sampling station of river sediments and soil profiles. The determination of concentration of heavy metals in soil samples were carried out using Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES) analysis. The result of analysis shows that highest concentration was copper with the average of 21.77 ppm, and followed by nickel with concentration level was 15.94 ppm. The concentration of chromium was 15.15 ppm, arsenic was 11.91 ppm and lead was 10.39 ppm. The soils samples are identified as non-polluted due to the low concentration of chromium, copper, nickel and lead but heavily polluted with arsenic when measured using Sediment Quality Guidelines of US EPA. It is concluded that the combined source of heavy metals in the study area would be the parent materials of the soils and other anthropogenic effluent.
Pages 13-15
Year 2017
Issue 1
Volume 1

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Comparison of Cohesion (c’), and Angle of Internal Friction (Ф’) Distribution in Highland Area of Kundasang by using Ordinary Kriging and Simple Kriging.

ABSTRACT

Comparison of Cohesion (c’), and Angle of Internal Friction (Ф’) Distribution in Highland Area of Kundasang by using Ordinary Kriging and Simple Kriging.

Journal: Geological Behavior (GBR)
Author: Mohd. Radzif. Taharin, Rodeano Roslee

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gbr.01.2017.16.18

The objective of the research is to determine the distribution of cohesion (c’), and angle of internal friction (Ф’) values for the highland area of Kundasang, Sabah by using kriging. A set of data from two adjacent site in Kundasang were collected from the site investigation report. There are three main stages in determining these parameters. The first stage is to use ordinary kriging methods to determine the modelling for these parameters. The second stage is to compare the results from ordinary kriging methods to simple kriging methods. The third stage is to produce the mapping for these parameters in the site, which could be used for slope stability and foundation design.
Pages 16-18
Year 2017
Issue 1
Volume 1

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