3D identification and stability analysis of key surface blocks of rock slope

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• 作者：Mingchao Li 李明超 ; Sibao Zhou 周四宝 ; Gang Wang 王 刚
• 刊名：Transactions of Tianjin University
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：22
• 期：4
• 页码：317-323
• 全文大小：1,123 KB
• 刊物类别：Engineering
• 刊物主题：Chinese Library of Science
  
• 出版者：Tianjin University
• ISSN：1995-8196
• 卷排序：22

文摘

Complicated geological structures make it difficult to analyze the stability of rock slopes, such as faults, weak intercalated layers or joint fissures. Based on 3D geological modeling and surface block identifying methods, an integrated methodology framework was proposed and realized to analyze the stability of surface blocks in rock slopes. The surface blocks cut by geological structures, fissures or free faces could be identified subjected to the four principles of closure, completeness, uniqueness and validity. The factor of safety(FOS)of single key block was calculated by the limit equilibrium method. If there were two or more connected blocks, they were defined as a block-group. The FOS of a block-group was computed by the Sarma method. The proposed approach was applied to an actual rock slope of a hydropower project, and some possible instable blocks were demonstrated and analyzed visually. The obtained results on the key blocks or block-groups provide essential information for determining potential instable region of rock slopes and designing effective support scheme in advance.Keywordsrock slope3D modelsurface blockblock-groupstabilityfactor of safety(FOS)