A NEW DISPLACEMENT PREDICTION METHOD OF BRITTLE JOINTED ROCK MASS CONSIDERING EXCAVATION UNLOADING SPLITTING EFFECT
LI Xiaojing1，2，ZHU Weishen2，LI Shucai2，YANG Weimin2
(1. School of Civil Engineering，Shandong Jianzhu University，Jinan，Shandong 250101，China；
2. Geotechnical and Structural Engineering Research Center，Shandong University，Jinan，Shandong 250061，China)
Abstract：Splitting failure happened frequently in the brittle surrounding rock mass of underground powerhouse cavern groups in southwest of China while excavation was performed. This kind of special engineering phenomenon has obtained become more and more attentions now. Adopting the linear slippage crack groups splitting model and applying fracture mechanics，energy analysis and crack propagation，the splitting criterion of cavern rock mass and displacement forecasting method reflecting splitting opening displacement was derived. Meanwhile，the effect of intrinsic cracks propagating into macroscopical splitting cracks parallel to the side wall of caverns approximately was considered. Moreover，the forecasting method was applied to the Jinping I hydropower station underground caverns engineering in China；the splitting failure zone and forecasting displacement were coincide with the monitoring data. The new forecasting displacement method could benefit the construction of similar underground caverns.
李晓静1，2，朱维申2，李术才2，杨为民2. 考虑开挖卸荷劈裂效应的脆性裂隙围岩位移预测新方法[J]. 岩石力学与工程学报, 2011, 30(7): 1445-1453.
LI Xiaojing1，2，ZHU Weishen2，LI Shucai2，YANG Weimin2. A NEW DISPLACEMENT PREDICTION METHOD OF BRITTLE JOINTED ROCK MASS CONSIDERING EXCAVATION UNLOADING SPLITTING EFFECT. , 2011, 30(7): 1445-1453.
李仲奎，周 钟，汤雪峰，等. 锦屏一级水电站地下厂房洞室群稳定性分析与思考[J]. 岩石力学与工程学报，2009，28(11)：2 167- 2 175.(LI Zhongkui，ZHOU Zhong，TANG Xuefeng，et al. Stability analysis and considerations of underground powerhouse caverns group of Jinping I hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(11)：2 167-2 175.(in Chinese))
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2011, Vol. 30 
