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25 12 Vol.25 No.12
2006 12 Chinese Journal of Rock Mechanics and Engineering Dec .2006
12 3
(1. 430071 2. 610016
3. 610065)
2 E. Hoek J. W. Bray
1/10/200
P642.22 O 242 A 1000 6915(2006)12 2546 06
THREE-DIMENSIONAL STABILITY ANALYSIS OF ROCK SLOPE WITH
STRENGTH REDUCTION METHOD
12 3
CHEN Fei DENG Jianhui
(1. Institute of Rock and Soil Mechanics Chinese Academy of SciencesWuhanHubei430071 China
2. Dadu River Hydropower Development Co .Ltd .ChengduSichuan610016China
3. State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University ChengduSichuan610065China)
Abstract The strength reduction method(SRM) is mainly used for two-dimensional slope stability analysis. In
order to verify its feasibility for the stability analysis of three-dimensional issuestwo benchmark problems i.e.
planar slide and wedge slide are selected and the safety factors are calculated by SRM. The obtained safety
factors agree well to the analytical solutions by E. Hoek and J. W. Brownand the modeled sliding direction is also
almost the same as the hypothetical one. In the analysissolid elements are used to model the behavior of structural
planes so the influences of their thickness and element intensity on modeling precision are further investigated.
For blocks cut by planar structural planes the influence is limited when the thickness is 1/10 1/200 of the block
height. Compared with the displacement criterion of characteristic points the entirely run-through criterion of
plastic zone is more rational fo
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