New method for dynamic stability analysis of rock slope under blasting vibration based on equivalent acceleration and Sarma method

被引:18
|
作者
Chen, Ming [1 ]
Lu, Wenbo [1 ]
Yan, Peng [1 ]
Zhou, Chuangbing [1 ]
机构
[1] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China
关键词
slope stability; blasting vibration; equivalent acceleration; Sarma method; safety factor; WAVE;
D O I
10.1139/cgj-2012-0475
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Dynamic stability of rock slopes under dynamic blasting disturbance and its analytic method are key problems in slope engineering. Based on wave theory, the relationship between blasting vibration velocity, acceleration, and stress state of slopes is studied. The results indicate that with the same blasting vibration velocity, peak stress of the slopes is identical. An equivalent acceleration calculation method is proposed for the limit equilibrium analysis of rock slope stability under blasting vibration. Considering the dynamic time-varying characteristics of the blasting vibration loading, a time-history method based on the equivalent acceleration and the Sarma method of limit equilibrium analysis is then presented for the dynamic stability analysis of rock slopes. On the basis of this new method, the high rock slopes on the left bank in the Jinping I Hydropower Station are analyzed. Results of the case study derived from the new analytic method indicate that this new method is reasonable.
引用
收藏
页码:441 / 448
页数:8
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