| 基于离散单元法的锚固岩质边坡动力响应研究 |
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| 作者姓名： | 聂柏松 沈振中 侯冰铃 江 婷 |
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| 作者单位： | 中国电建集团华东勘测设计研究院有限公司;河海大学水利水电学院;浙江省钱塘江管理局设计院萧山分院 |
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| 基金项目： | 国家自然科学基金(51179062) ；江苏省自然科学基金青年基金（BK2012410） |
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| 摘 要： | 采用离散元单法和动力时程法,应用UDEC程序,计算某水电站厂房后方顺层块状岩体边坡动力响应,计算结果表明:动力荷载作用下未支护岩质边坡的破坏可划分成:未滑动、缓慢发展、加速发展和破坏4个阶段;边坡在地震荷载下的破坏是一个累积的过程;锚杆单元的轴力响应曲线与该单元附近的岩体的相对位移时程曲线相关性很好,表明锚杆周边单元之间相对位移是导致锚杆发挥加固作用的原因之一。研究了锚杆轴力分布规律,并据此提出了边坡加固优化方案,该加固方案对相似工程具有参考意义。
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| 关 键 词： | 边坡 离散单元法 地震 动力稳定性 锚杆 |
Dynamic processes of anchored rock slope with discrete element method |
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| Authors: | NIE Baisong SHEN Zhenzhong HOU Bingling JIANG Ting |
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| Abstract: | The dynamic failure processes of a block of rock behind the powerhouse of a hydro-power plant was investigated using the universal distinct element code (UDEC),which is based on discrete element method (DEM),and the dynamic time history method.The result showed that the failure processes of rock slope without support can be divided into four stages:namely unsliding stage,slow sliding stage,accelerating stage and failure stage.That is to say the failure of rock slope under seismic load is a cumulative process.The axial force response curve of anchor showed a good correlation with the relative displacement of element around the anchor element,which indicated that the latter could be one of factors of the anchor reinforcement effects under earthquake.The optimal proposals for slope strengthening was suggested based on the cable axial force distribution pattern,and it could be used as a reference for the similar projects. |
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| Keywords: | rock slope discrete element method earthquake dynamic stability cable |
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