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| BLOCK ELEMENT METHOD FOR DYNAMICALLY SIMULATING EXCAVATION PROCESS OF ROCK SLOPE |
| (State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan，Hubei 430072，China) |
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Abstract The computational accuracy and efficiency of the conventional simulation method cannot meet the need of information design of rock slope. Based on the new idea of “dynamic simulation”，the block element method is proposed to dynamically simulate the excavation process of rock slope. Firstly，the “cutting algorithm” is put forward to identify the block system，in which the new discontinuity or excavation is introduced into the model by cutting the current block system，and the deletion of discontinuity is implemented by block mergence. So the variable block system during excavation can be identified dynamically，and the efficiency of the identification algorithm is improved. After that，the calculation of the excavation load during the dynamic simulation is discussed in detail and implemented in the block element method，in which those problems caused by the artificial pre-imbedded planes and their stiffness in modeling the excavation procedure are totally avoided. Finally，the newly proposed method is verified to be accurate and efficient by a simple numerical example and an engineering example.
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Received: 26 September 2010
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2011, Vol. 30 
