Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Failure mechanism of overhanging slopes in sedimentary rocks with dissimilar mechanical properties
Abstract The paper discusses a slope failure which occurred in December 2009 adjacent to a road in northern Greece. Thick Miocene limestone horizons are interbedded with relatively thin weak horizons of silty to sandy clays and loams which are more easily eroded, resulting in the formation of notches. The weak horizon acts as an aquitard, inhibiting downward percolation from both rainfall and house discharges. The two main areas of failure occurred where the notches were particularly deep (hence the overhang was greatest) at a time when heavy rainfall created a hydrostatic head within the bedrock to the west of the slope face. The stability of the notched benches is controlled by the tensile strength of rock bridges in the limestone’s discontinuities. The analysis showed that the limestone’s in situ tensile strength and cohesion are on average three times lower than those obtained from laboratory tests, hence their application in the failure analysis would lead to an overestimation of the slope stability.
Failure mechanism of overhanging slopes in sedimentary rocks with dissimilar mechanical properties
Abstract The paper discusses a slope failure which occurred in December 2009 adjacent to a road in northern Greece. Thick Miocene limestone horizons are interbedded with relatively thin weak horizons of silty to sandy clays and loams which are more easily eroded, resulting in the formation of notches. The weak horizon acts as an aquitard, inhibiting downward percolation from both rainfall and house discharges. The two main areas of failure occurred where the notches were particularly deep (hence the overhang was greatest) at a time when heavy rainfall created a hydrostatic head within the bedrock to the west of the slope face. The stability of the notched benches is controlled by the tensile strength of rock bridges in the limestone’s discontinuities. The analysis showed that the limestone’s in situ tensile strength and cohesion are on average three times lower than those obtained from laboratory tests, hence their application in the failure analysis would lead to an overestimation of the slope stability.
Failure mechanism of overhanging slopes in sedimentary rocks with dissimilar mechanical properties
Makedon, Th. (Autor:in) / Chatzigogos, N. (Autor:in)
2012
Aufsatz (Zeitschrift)
Englisch
Failure mechanism of overhanging slopes in sedimentary rocks with dissimilar mechanical properties
| Online Contents | 2012
Kinematics of overhanging rock slopes
| British Library Conference Proceedings | 2007
Kinematics of Overhanging Slopes in Discontinuous Rock
| Online Contents | 2009
Kinematics of Overhanging Slopes in Discontinuous Rock
| British Library Online Contents | 2009