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D04155GE <br />The theoretical factor of safety of the cross section analyzed is about 1.04. Unfortunately due to <br />the scale of the cross section it is difficult to see that the critical failure surface occurred on the <br />erosional head scarp on the slope, but it was easy to make the distinction of the failure surface on <br />the computer screen during the analysis. The result is quite predictable, since it is obvious that <br />periodic raveling of the head scarp is occurring. <br />We analyzed the global stability long the same cross section by defining the potential critical <br />surface away from the head scarp. This analysis is shown below <br />cwnm .a-o.-oa s:xs <br />Globo StabNity Phi = i6, C = 15 <br />IOO0 ~ 10 most crrlic0l surfaces, MINIMUM JANBU FO$ = 1.22] <br />900 <br />m 600 <br />m <br />N <br />X <br />a Boa <br />I <br />zoo <br />o~ <br />o zao aoo 90o aoo loco Izo9 I~oo X900 <br />X-A%IS (feet) <br />~xztthErt tttt~ ~98IItI~ttEB <br />CONSULTING GEOTECHNICAL ENGINEERS AND <br />-6- MATERIALS TESTING <br />