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Instability analysis of bedding rock slope based on the statistical constitutive damage model
Pages: 7-10+29
Year: Issue:  9
Journal: Geotechnical Investigation & Surveying

Keyword:  bedding rock slopeinstability of pressure barself-gravity loadcritical heightstatistical damage model;
Abstract: Buckling failure is one of the main instability failure modes,which is similar to classic Euler pressure bar instability failure theory,but there is much difference between them.On basis of stating the mechanical essence of their similarities and differences,the calculation formula of critical height,under which the vertical rock layer will not buckle to failure under self-gravity load,is firstly deduced based on the relevant results of other researchers,and then it is extended to the general bedding rock slope.The result shows that the critical height of the bedding rock slope calculated by the method proposed in this paper is 75% that of other researchers.Meanwhile,based on the hypothesis that the mechanical property of rock obeys the statistical damage model,the according instability calculation model of the bedding rock slope is proposed,which is regarded as the improvement to the aforesaid method.Through the influencing study of the calculation parameters,m and ε0on the results,it is found that the parameters would effectthe results,and that it is very necessary to consider the damage evolution of rock in these similar problems.
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