ROCK SLOPE STABILITY ANALYSIS USING SLOPE STABILITY PROBABILITY CLASSIFICATION (SSPC) AND ITS COMPARISON WITH CONTINUOUS SLOPE MASS RATING (CSMR) METHOD ALONG ROAD CUT SLOPES IN TAWAELI-TOBOLI KM 34-45, CENTRAL SULAWESI
The use of a probabilistic approach in rock slope engineering to analyze the degree of stability, has increased slowly over the past two decades. This approach uses the percentage probability of stability on each slope to show how stable a rock slope is. The probabilistic approach to rock slope stab...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/37188 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The use of a probabilistic approach in rock slope engineering to analyze the degree of stability, has increased slowly over the past two decades. This approach uses the percentage probability of stability on each slope to show how stable a rock slope is. The probabilistic approach to rock slope stability incorporates consideration of the uncertainty and variation of geotechnical properties of rock mass. The analysis in this method is performed on the geotechnical property variable of the mass of the rock. The input parameters in the analysis are obtained by statistical processing of geological data.
The stability of the rock slopes on the Tawaeli-Toboli road, which is a national road access with high landslide vulnerability, is evaluated with Slope Stability Probability Classification (SSPC) and compared with the Continuous Slope Mass Rating (CSMR) method which was previously known and used in various regions around the world. The scanline discontinuity survey was conducted at several different slope locations at the research site to obtain discontinuity properties that were the main input parameters in the SSPC and CSMR systems.
The results of the analysis show that some points indicate a low value similarity in the CSMR and SSPC systems, and some of the other points show striking differences. This is due to differences in some rock mass parameters considered from both scoring systems. Differences are also seen in the most potentially alleged collapse mode at each point. The SSPC system identifies modes of circular collapse, planar slippage, and rolling litter, while the CSMR system identifies the dominant wedge failure mode in the study area. The CSMR system can assess the potential of wedge failure on the rock slopes, while the SSPC can assess the potential for circular failure on the rock slopes.
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