Influence of mountain topographic and geological structural plane on seismic response of rock cavern
ZHU Zeqi1，SHENG Qian1，CHEN Zijing2，LI Jianhe1
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. School of Civil Engineering and Architecture，Nanchang University，Nanchang，Jiangxi 330031，China)
A simplified analysis model and complex models with consideration of the effects of topography，discontinuous geological plane were established and applied to the underground caverns of Dagangshan hydropower station under construction. The finite difference software FLAC is used for the seismic response analysis of surrounding rock mass of under ground caverns. The result shows that the mountain topography has some influences on seismic displacement and acceleration of upper surrounding rock mass，which mainly beimposed P-wave vibration loading. The effect of the weak structural plane which strengthening S-wave shear to the surrounding rock mass，is relatively remarkable on the earthquake response of caverns，and the effect zone of it is limited to vicinity of cutting surrounding rock mass. The effect regularity of the geological structural plane is different on earthquake waves with different frequency components.
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2017, Vol. 36 
