IBE-PFE方法在某水电站泄洪洞出口边坡稳定分析中的应用

发布时间：2019-03-15 13:35

【摘要】：鉴于传统方法在含复杂结构面岩质边坡稳定分析中的局限性,引进分区有限元与块体界面元混合算法,验算边坡的稳定性。针对某水电站泄洪洞出口边坡地形地质条件和结构面分布特点,建立数值模型。采用分区有限元与块体界面元混合算法,并结合强度折减法,逐步降低不连续面抗剪强度,计算得出块体刚体位移和接触点对接触状态。根据块体刚体位移发生突变并结合滑动通道失效点对完全连通,确定了边坡的安全系数和破坏方式。结果表明:边坡稳定安全系数为1.80;边坡最可能以坡顶预设缝、坡脚预设缝以及f_(555)结构面为滑动通道发生失稳破坏。该方法具有准确确定边坡危险滑动面和安全系数的优点。
[Abstract]:In view of the limitation of the traditional method in the stability analysis of rock slope with complex structure, the mixed algorithm of zone finite element and block interface element is introduced to check the stability of slope. According to the topographical and geological conditions and structural plane distribution characteristics of the outlet slope of a hydropower station, a numerical model is established. Combined with the strength reduction method, the shear strength of discontinuous surfaces is reduced step by using the mixed method of zone finite element and block interface element, and the displacement of rigid body and the contact state of contact point are calculated. The safety factor and failure mode of the slope are determined according to the sudden change of the displacement of the rigid body of the block and the complete connection between the failure points of the sliding channel. The results show that the stability safety factor of the slope is 1.80, and the slope is most likely to be destroyed by the pre-set joints at the top of the slope, the preset joints at the foot of the slope and the f555 structural plane as sliding channels. This method has the advantages of accurately determining the dangerous slip surface and safety factor of the slope.
【作者单位】：河海大学水利水电学院;三峡大学水利与环境学院;防灾减灾湖北省重点实验室(三峡大学);
【基金】：国家重点研发计划(2016YFC0401601) 水利部公益性行业科研专项经费项目(201501033) 防灾减灾湖北省重点实验室(三峡大学)开放基金资助项目(2016KJZ07) 三峡大学高层次人才科研启动基金资助项目(20160905) 江苏省2015年度普通高校研究生科研创新计划项目(KYLX15_0439)
【分类号】：TV223

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