Rock mass classification system of the Crocker formation in Kota Kinabalu for rock slope engineering purpose, Sabah, Malaysia

This study aims to classify the rock mass of the interbedded Crocker Formation in Kota Kinabalu, Sabah. The rock cut slopes in CPSB Stone Quarry Sdn Bhd (slope B1, B2, B3 and B4) and Lakang Point (slope LP) in Tamparuli, Tuaran Hospital (slope TH) in Tuaran and Telipok-Sulaman by-pass (slope TS1 eas...

Full description

Saved in:

Bibliographic Details
Main Author:	Ismail Abd Rahim
Format:	Thesis
Language:	English English
Published:	2011
Subjects:	TA703-712 Engineering geology Rock mechanics Soil mechanics Underground construction
Online Access:	https://eprints.ums.edu.my/id/eprint/39146/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/39146/2/FULLTEXT.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-ums-ep.39146
record_format	uketd_dc
institution	Universiti Malaysia Sabah
collection	UMS Institutional Repository
language	English English
topic	TA703-712 Engineering geology Rock mechanics Soil mechanics Underground construction
spellingShingle	TA703-712 Engineering geology Rock mechanics Soil mechanics Underground construction Ismail Abd Rahim Rock mass classification system of the Crocker formation in Kota Kinabalu for rock slope engineering purpose, Sabah, Malaysia
description	This study aims to classify the rock mass of the interbedded Crocker Formation in Kota Kinabalu, Sabah. The rock cut slopes in CPSB Stone Quarry Sdn Bhd (slope B1, B2, B3 and B4) and Lakang Point (slope LP) in Tamparuli, Tuaran Hospital (slope TH) in Tuaran and Telipok-Sulaman by-pass (slope TS1 east, TS1 west, TS2 east and TS2 west of Telipok) in Telipok were selected for this study. The facies types in the study area are very thick-bedded sandstone unit (facies B), thick to medium-bedded sandstone unit (facies C), thin-bedded sandstone unit (facies D), thin-bedded siltstone and/or sandstone unit (facies E) and thick-bedded shale unit (facies F) which form the channel, channel-lobe, lobe prograding and basin plain facies associations. Application and evaluation of four selected existing rock mass classification system contribute to the formulation of Modified Slope Mass Rating (M-SMR) system for classifying the Crocker Formation rock mass. The M-SMR is obtained from basic Rock Mass Rating (RMRbasic) by adding an adjustment factor (discontinuity orientation parameter). The M-SMR parameter calculation for interbedded Crocker Formation rock mass quality are lithological unit thickness (LUT) approaches, classical RQD calculation method, weighted averaged of discontinuity set, weighted averaged, normal condition and new adjustment factor (NAF) for UCS, RQD, discontinuity spacing, discontinuity condition, water flow and discontinuity orientation parameters, respectively. For the safety of rock slope design, the weighted averaged of worst discontinuity set spacing, worst rating of discontinuity condition and worst condition of water flow are recommended. The M-SMR system is divided into class I (very low risk, very stable) to class VI (extremely risky, extremely unstable). Slope TS1 east, TS2 west and LP representing class II, slope B3 class III, slope B4, TS1 west and TS2 east class IV, slope B1 and B2 class V and slope TH class VI in the study area. The M-SMR system was formulate in order to propose the rock cut slope design in term of rock cut slope stabilization and protection measure, design model review and slope remapping and optimal slope angle for the interbedded Crocker Formation in the study area. Suggested risk mitigation measure for Crocker Formation are slope re-excavation for ‘extremely risky’ slope TH and only some scaling for ‘low risk’ slope LP, TS1 east and TS2 west. Detailed design model review (DMR) and slope remapping by expert and experienced engineering geologists or geotechnical engineers is highly recommended for class VI and V and IV of M-SMR in slope TH and slope B1 and B2 and slope B4, TS2 east and TS1 west, respectively. Slope TS1 east, TS2 west and LP of stable class II is only recommended for DMR and slope remapping by engineering geologist or geotechnical engineer. The range of optimum slope angle for less than 50m height slope of the Crocker Formation in the study area is between 65o to 70o and 40o to 45o for class II and IV of M-SMR system, respectively. Correlation between the Modified Slope Mass Rating (M-SMR) with geomechanical characteristics of the Crocker Formation such as facies characteristic, orientation of bedding planes with respect to slopes face, rate of weathering and degree of deformation and mode of rock slope failure is also produced. The diagonal orientation of bedding plane with respect to slope face of the channel, channel-lobe, migrating lobe and basin plain facies has been representing class II, class III to V (depending to channel and lobe facies ratio), class IV and class VI, respectively in the study area.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Ismail Abd Rahim
author_facet	Ismail Abd Rahim
author_sort	Ismail Abd Rahim
title	Rock mass classification system of the Crocker formation in Kota Kinabalu for rock slope engineering purpose, Sabah, Malaysia
title_short	Rock mass classification system of the Crocker formation in Kota Kinabalu for rock slope engineering purpose, Sabah, Malaysia
title_full	Rock mass classification system of the Crocker formation in Kota Kinabalu for rock slope engineering purpose, Sabah, Malaysia
title_fullStr	Rock mass classification system of the Crocker formation in Kota Kinabalu for rock slope engineering purpose, Sabah, Malaysia
title_full_unstemmed	Rock mass classification system of the Crocker formation in Kota Kinabalu for rock slope engineering purpose, Sabah, Malaysia
title_sort	rock mass classification system of the crocker formation in kota kinabalu for rock slope engineering purpose, sabah, malaysia
granting_institution	Universiti Malaysia Sabah
granting_department	Sekolah Sains dan Teknologi
publishDate	2011
url	https://eprints.ums.edu.my/id/eprint/39146/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/39146/2/FULLTEXT.pdf
_version_	1811770492384706560
spelling	my-ums-ep.391462024-07-26T01:19:26Z Rock mass classification system of the Crocker formation in Kota Kinabalu for rock slope engineering purpose, Sabah, Malaysia 2011 Ismail Abd Rahim TA703-712 Engineering geology. Rock mechanics. Soil mechanics. Underground construction This study aims to classify the rock mass of the interbedded Crocker Formation in Kota Kinabalu, Sabah. The rock cut slopes in CPSB Stone Quarry Sdn Bhd (slope B1, B2, B3 and B4) and Lakang Point (slope LP) in Tamparuli, Tuaran Hospital (slope TH) in Tuaran and Telipok-Sulaman by-pass (slope TS1 east, TS1 west, TS2 east and TS2 west of Telipok) in Telipok were selected for this study. The facies types in the study area are very thick-bedded sandstone unit (facies B), thick to medium-bedded sandstone unit (facies C), thin-bedded sandstone unit (facies D), thin-bedded siltstone and/or sandstone unit (facies E) and thick-bedded shale unit (facies F) which form the channel, channel-lobe, lobe prograding and basin plain facies associations. Application and evaluation of four selected existing rock mass classification system contribute to the formulation of Modified Slope Mass Rating (M-SMR) system for classifying the Crocker Formation rock mass. The M-SMR is obtained from basic Rock Mass Rating (RMRbasic) by adding an adjustment factor (discontinuity orientation parameter). The M-SMR parameter calculation for interbedded Crocker Formation rock mass quality are lithological unit thickness (LUT) approaches, classical RQD calculation method, weighted averaged of discontinuity set, weighted averaged, normal condition and new adjustment factor (NAF) for UCS, RQD, discontinuity spacing, discontinuity condition, water flow and discontinuity orientation parameters, respectively. For the safety of rock slope design, the weighted averaged of worst discontinuity set spacing, worst rating of discontinuity condition and worst condition of water flow are recommended. The M-SMR system is divided into class I (very low risk, very stable) to class VI (extremely risky, extremely unstable). Slope TS1 east, TS2 west and LP representing class II, slope B3 class III, slope B4, TS1 west and TS2 east class IV, slope B1 and B2 class V and slope TH class VI in the study area. The M-SMR system was formulate in order to propose the rock cut slope design in term of rock cut slope stabilization and protection measure, design model review and slope remapping and optimal slope angle for the interbedded Crocker Formation in the study area. Suggested risk mitigation measure for Crocker Formation are slope re-excavation for ‘extremely risky’ slope TH and only some scaling for ‘low risk’ slope LP, TS1 east and TS2 west. Detailed design model review (DMR) and slope remapping by expert and experienced engineering geologists or geotechnical engineers is highly recommended for class VI and V and IV of M-SMR in slope TH and slope B1 and B2 and slope B4, TS2 east and TS1 west, respectively. Slope TS1 east, TS2 west and LP of stable class II is only recommended for DMR and slope remapping by engineering geologist or geotechnical engineer. The range of optimum slope angle for less than 50m height slope of the Crocker Formation in the study area is between 65o to 70o and 40o to 45o for class II and IV of M-SMR system, respectively. Correlation between the Modified Slope Mass Rating (M-SMR) with geomechanical characteristics of the Crocker Formation such as facies characteristic, orientation of bedding planes with respect to slopes face, rate of weathering and degree of deformation and mode of rock slope failure is also produced. The diagonal orientation of bedding plane with respect to slope face of the channel, channel-lobe, migrating lobe and basin plain facies has been representing class II, class III to V (depending to channel and lobe facies ratio), class IV and class VI, respectively in the study area. 2011 Thesis https://eprints.ums.edu.my/id/eprint/39146/ https://eprints.ums.edu.my/id/eprint/39146/1/24%20PAGES.pdf text en public https://eprints.ums.edu.my/id/eprint/39146/2/FULLTEXT.pdf text en validuser dphil doctoral Universiti Malaysia Sabah Sekolah Sains dan Teknologi

Rock mass classification system of the Crocker formation in Kota Kinabalu for rock slope engineering purpose, Sabah, Malaysia

Similar Items