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有色金属(矿山部分):2023,75(5):52-62
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基于离散元法的抗滑桩加固顺倾节理岩质边坡抗震性能研究
李其在1,周癸武1,梁栋才2,3?,邓 琴2,3
((1. 云南黄金矿业集团股份有限公司,昆明 650020; 2. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室,武汉 430071; 3. 中国科学院大学,北京 100049))
Study on seismic behavior of rock slope with inclined joints strengthened by anti slide piles based on discrete element method
LI Qizai1, ZHOU Guiwu1, LIANG Dongcai2,3, DENG Qin2,3
((1. Yunnan Gold & Mining Group Co., Ltd., Kunming 650200, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China))
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投稿时间:2022-10-16    修订日期:2023-03-14
中文摘要: 以抗滑桩加固后的顺倾节理岩质边坡为研究对象,使用颗粒流软件建立边坡数值模型,分析了边坡自然状态下的破坏模式和加固后的变形特征,通过输入真实地震波,对地震作用下顺倾节理岩质边坡和抗滑桩的动力响应和破坏模式进行了系统的研究。研究结果表明,在自然状态下的顺倾节理岩质边坡的破坏模式属于前缘牵引式,后缘垂直拉裂,滑坡内部拉剪组合破坏沿顺倾节理方向滑移,与实际情况相符;抗滑桩可降低结构面的不利影响,保持边坡整体稳定;地震荷载作用下,抗滑桩可保证边坡不发生大规模破坏,同时降低了结构面对边坡破坏模式的不利影响,讨论了不同工况下的边坡安全系数。本研究对地震诱发滑坡风险的预测和加固设计具有重要的意义。
中文关键词: 抗滑桩  地震  颗粒流  加固  破坏模式  动力响应
Abstract:In this paper, the downhill jointed rock slope strengthened by anti slide pile is taken as the research object, and the numerical calculation model of slope is established by particle flow analysis software PFC2D. The failure mode of slope in the natural state and the deformation characteristics after reinforcement are analyzed. Through inputting the real seismic wave, the dynamic response and failure mode of downhill jointed rock slope and anti slide pile under earthquake are systematically studied. The results show that the failure mode of the rock slope with inclined joints in the natural state belongs to the leading edge traction type and the trailing edge vertical tensile crack. The internal tensile shear combination failure of the landslide slides along the direction of the inclined joints, which is consistent with the actual situation; The anti slide pile can reduce the adverse effect of the structural plane and maintain the overall stability of the slope; Under the action of earthquake load, the anti slide pile can ensure that the slope will not be damaged on a large scale, and reduce the adverse impact of the structure on the slope failure mode. The slope safety factor under different working conditions is discussed This study is of great significance to the prediction of earthquake induced landslide risk and reinforcement design.
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基金项目:国家自然科学基金(52179117)
引用文本:
李其在,周癸武,梁栋才,邓 琴.基于离散元法的抗滑桩加固顺倾节理岩质边坡抗震性能研究[J].有色金属(矿山部分),2023,75(5):52-62.
LI Qizai,ZHOU Guiwu,LIANG Dongcai,DENG Qin.Study on seismic behavior of rock slope with inclined joints strengthened by anti slide piles based on discrete element method[J].NONFERROUS METALS(Mining Section),2023,75(5):52-62.

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