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Effects of road drainage and geometry in causing roadside slope failures
316A and a matrix of susceptibility values to indicate potential for slope failure has been developed. Lithology, slope angle, and slope aspect are three factors of major importance. 935377 Development of slope stability regulation for sand mining industry in central Florida Kuo, S S; Powley, V I Proc 28th Symposium on Engineering Geology and Geotechnical Engineering, Boise, 1-3 April 1992 P349-360. Publ Pocatello." Idaho State University, 1992 Slopes reclaimed after sand extraction must have adequate stability to ensure public safety. A study is described which was carried out by the regulatory authorities to obtain information to help determine steepest permissable stable slope angles. Soil samples were taken from two pits considered 'typical' and characterised in the laboratory. Stability analysis of existing and possible alternative slopes was carried out using the code PCSTABL4. Results indicate a slope angle of 1:2.75 will give a safety factor of at least 2.0.
935378 Slope analysis of Pusak river bank Sambhandharaksa, S; Sreium, T Proc Ninth Asian Regional Conference on Soil Mechanics and Foundation Engineering, Bangkok, 9-13 December 1991 VI, P335-338. Publ Thailand." Southeast Asian Geotechnical Society, 1991 Dredging of the river and rapid change in river level during summer have been identified as main factors associated with failures of the banks of the Pasak river, Thailand. Soil conditions and soil properties are described. Total stress analysis using soil parameters from triaxial compression and extension tests has been carried out for 7 limiting conditions of groundwater and river levels. Wedge analysis gives better results than circular arc analysis where medium to stiff clays overlie very stiff clays. 935379 Effects of road drainage and geometry in causing roadside slope failures Au, S W C; Suen, R Y C Proc Ninth Asian Regional Conference on Soil Mechanics and Foundation Engineering, Bangkok, 9-13 December 1991 V1, P373-376. Publ Thailand." Southeast Asian Geotechnical Society, 1991
material, is described. Site investigation and slope movement monitoring were carried out. The failure was identified as reactivation of a former landslide. Laboratory measured and back analysed values of residual strength of the mudstone agree well. The alignment was redesigned so as to remove all the slip material.
935381 Investigation into embankment failure at Kolaghat De, P K Proc Ninth Asian Regional Conference on Soil Mechanics and Foundation Engineering, Bangkok, 9-13 December 1991 V1, P389-392. Publ Thailand: Southeast Asian Geotechnical Society, 1991 Progressive shear failure of an elevated embankment on the banks of the river Rupnarayan occurred in 1986. Detailed investigation followed, including sinking of large numbers of boreholes inside and outside the failed section. The layered soil profile, extent and profile of the final failure, and soil mechanical properties were investigated. A simple design office slip-failure analysis for the best fit failure patterns to the final shape of the failure was used in determining the failure mechanism.
935382 Stability and closure design for a landfill on soft clay and peat Mitchell, R A; Hatch, S E; Siegel, R A Proc Conference Stability and Performance of Slopes and Embankments I!, Berkeley, 29 Jane-I July 1992 VI, P685704. Publ New York: ASCE, 1992 (ASCE Special Geotechnical Publication No 31) A number of statutory conditions must be met for closure of landfills in the USA, including safety requirements for slopes. A case study is presented of closure of a municipal waste landfill in California over soft mud and peat foundations. Short term safety factors at closure were marginal and although dewatering and increasing cover thickness made some improvements, design values could not always be reached. Long term safety factors, after consolidation of the soft soils, were calculated as 1.9-2.7. In this and similar situations, it is necessary to accept dual safety factors, long term and short term.
Rainstorm-associated slope failures are common in Hong Kong. High concentration of surface water as a result of runoff from road surfaces has been identified as a major contributory factor to these failures. The geometrical and drain-off features of the roads which lead to the concentrated runoff are examined and preventive treatment suggested.
935383 Embankment on soft clay with an adjacent cut Steiner, W; Metzger, R; Marr, W A Proc Conference Stability and Performance of Slopes and Embankments !i, Berkeley, 29 Jane-I July 1992 VI, P705720. Publ New York." ASCE, 1992 (ASCE Special Geotechnical Publication No 31)
935380 Cut slope failure in the Garinono Formation of Sabah Barry, A J Proe Ninth Asian Regional Conference on Soil Mechanics and Foundation Engineering, Bangkok, 9-13 December 1991 V1, P381-384. Publ Thailand." Southeast Asian Geotechnical Society, 1991
A tunnelling project in Switzerland required the muck to be deposited on a soft postglacial cut, adjacent to a 12-15m deep cut. Instrumentation was installed to monitor stability of the embankment and cut during fill placement. Predicted and measured performance of the cut-fill are described. Predicted horizontal displacements were generally 2-3 times those measured. Probability theory used in addition to stability calculations led to changes in design, even though conventional factors of safety were adequate. Despite engineering effort, unforeseen freeze/thaw/rain effects led to embankment slope instabilities.
Road improvements in Sabah have required extensive earthworks in Garinono Formation materials, slump breccia of mudstone, shales, and sandstones. Construction of one shallow cutting, which resulted in a slip of some 10000 cubic m of
© 1993 Pergamon Press Ltd. Reproduction not permitted
935378 Slope analysis of Pusak river bank Sambhandharaksa, S; Sreium, T Proc Ninth Asian Regional Conference on Soil Mechanics and Foundation Engineering, Bangkok, 9-13 December 1991 VI, P335-338. Publ Thailand." Southeast Asian Geotechnical Society, 1991 Dredging of the river and rapid change in river level during summer have been identified as main factors associated with failures of the banks of the Pasak river, Thailand. Soil conditions and soil properties are described. Total stress analysis using soil parameters from triaxial compression and extension tests has been carried out for 7 limiting conditions of groundwater and river levels. Wedge analysis gives better results than circular arc analysis where medium to stiff clays overlie very stiff clays. 935379 Effects of road drainage and geometry in causing roadside slope failures Au, S W C; Suen, R Y C Proc Ninth Asian Regional Conference on Soil Mechanics and Foundation Engineering, Bangkok, 9-13 December 1991 V1, P373-376. Publ Thailand." Southeast Asian Geotechnical Society, 1991
material, is described. Site investigation and slope movement monitoring were carried out. The failure was identified as reactivation of a former landslide. Laboratory measured and back analysed values of residual strength of the mudstone agree well. The alignment was redesigned so as to remove all the slip material.
935381 Investigation into embankment failure at Kolaghat De, P K Proc Ninth Asian Regional Conference on Soil Mechanics and Foundation Engineering, Bangkok, 9-13 December 1991 V1, P389-392. Publ Thailand: Southeast Asian Geotechnical Society, 1991 Progressive shear failure of an elevated embankment on the banks of the river Rupnarayan occurred in 1986. Detailed investigation followed, including sinking of large numbers of boreholes inside and outside the failed section. The layered soil profile, extent and profile of the final failure, and soil mechanical properties were investigated. A simple design office slip-failure analysis for the best fit failure patterns to the final shape of the failure was used in determining the failure mechanism.
935382 Stability and closure design for a landfill on soft clay and peat Mitchell, R A; Hatch, S E; Siegel, R A Proc Conference Stability and Performance of Slopes and Embankments I!, Berkeley, 29 Jane-I July 1992 VI, P685704. Publ New York: ASCE, 1992 (ASCE Special Geotechnical Publication No 31) A number of statutory conditions must be met for closure of landfills in the USA, including safety requirements for slopes. A case study is presented of closure of a municipal waste landfill in California over soft mud and peat foundations. Short term safety factors at closure were marginal and although dewatering and increasing cover thickness made some improvements, design values could not always be reached. Long term safety factors, after consolidation of the soft soils, were calculated as 1.9-2.7. In this and similar situations, it is necessary to accept dual safety factors, long term and short term.
Rainstorm-associated slope failures are common in Hong Kong. High concentration of surface water as a result of runoff from road surfaces has been identified as a major contributory factor to these failures. The geometrical and drain-off features of the roads which lead to the concentrated runoff are examined and preventive treatment suggested.
935383 Embankment on soft clay with an adjacent cut Steiner, W; Metzger, R; Marr, W A Proc Conference Stability and Performance of Slopes and Embankments !i, Berkeley, 29 Jane-I July 1992 VI, P705720. Publ New York." ASCE, 1992 (ASCE Special Geotechnical Publication No 31)
935380 Cut slope failure in the Garinono Formation of Sabah Barry, A J Proe Ninth Asian Regional Conference on Soil Mechanics and Foundation Engineering, Bangkok, 9-13 December 1991 V1, P381-384. Publ Thailand." Southeast Asian Geotechnical Society, 1991
A tunnelling project in Switzerland required the muck to be deposited on a soft postglacial cut, adjacent to a 12-15m deep cut. Instrumentation was installed to monitor stability of the embankment and cut during fill placement. Predicted and measured performance of the cut-fill are described. Predicted horizontal displacements were generally 2-3 times those measured. Probability theory used in addition to stability calculations led to changes in design, even though conventional factors of safety were adequate. Despite engineering effort, unforeseen freeze/thaw/rain effects led to embankment slope instabilities.
Road improvements in Sabah have required extensive earthworks in Garinono Formation materials, slump breccia of mudstone, shales, and sandstones. Construction of one shallow cutting, which resulted in a slip of some 10000 cubic m of
© 1993 Pergamon Press Ltd. Reproduction not permitted