Lee, Kiun You and Ismail Abd Rahim (2017) Application of the GSI system for slope stability studies on selected slopes of the Crocker Formation in Kota Kinabalu area, Sabah. Journal of Geological Behavior, 1. pp. 10-12. ISSN 2521-0890 (P-ISSN) , 2521-0491 (E-ISSN)
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Application of the GSI system for slope stability studies on selected slopes of the Crocker Formation in Kota Kinabalu area, Sabah.pdf Restricted to Registered users only Download (876kB) | Request a copy |
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Application of the GSI system for slope stability studies on selected slopes of the Crocker Formation in Kota Kinabalu area _ABSTRACT.pdf Download (62kB) |
Abstract
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.
| Item Type: | Article |
|---|---|
| Keyword: | Geological strength index , GSI , Slope stability , Crocker Formation , Finite element analysis |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA1-2040 Engineering (General). Civil engineering (General) |
| Department: | FACULTY > Faculty of Science and Natural Resources |
| Depositing User: | SAFRUDIN BIN DARUN - |
| Date Deposited: | 25 Apr 2022 12:02 |
| Last Modified: | 25 Apr 2022 12:02 |
| URI: | https://eprints.ums.edu.my/id/eprint/32475 |
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