危岩稳定性分析的三维离散元超载法与强度折减法对比研究  

Comparative study on 3D discrete element-based overloadmethod and strength reduction method for stability analysis of dangerous rocks

作　　者：苏国韶[1,2,3] 甘衍垦 刘友能 王钧沐 Su Guoshao;Gan Yanken;Liu Youneng;Wang Junmu(School of Civil and Architecture Engineering,Guangxi University,Nanning Guangxi 530004,China;Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi University,Nanning Guangxi 530004,China;Guangxi Provincial Engineering Research Center of Water Security and Intelligent Control for Karst Region,Guangxi University,Nanning Guangxi 530004,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西大学工程防灾与结构安全教育部重点实验室,广西南宁530004 [3]广西大学广西岩溶区水安全与智慧调控工程研究中心,广西南宁530004

出　　处：《山西建筑》2024年第24期1-5,共5页Shanxi Architecture

基　　金：国家自然科学基金资助项目(No.52169021);循环荷载下岩溶区裂隙-溶孔危岩失稳机制的试验研究(批准号:SKLGME023024)。

摘　　要：针对危岩结构面复杂、求解稳定性系数不够精确的问题,运用三维离散元3DEC软件探讨超载法与强度折减法对滑移式、坠落式、倾倒式三种典型危岩进行稳定性分析的适用性。通过引入结构面非贯通段,考虑了三维空间特征的影响。通过在不同类型的危岩下对比分析超载法和强度折减法所求出的稳定性系数,得出较为准确的计算方法。结果表明,对于滑移式、坠落式、倾倒式类型的危岩利用三维离散元求解危岩稳定性系数时,超载法的计算结果与刚体极限平衡法更为接近。In response to the problem of complex structural planes of dangerous rocks and imprecise calculation of stability coefficients,this paper uses 3D discrete element 3DEC software combined with overload method and strength reduction method to analyze the stability of three typical dangerous rocks:sliding,falling,and tilting.The non-penetrating part of structural plane was introduced to consider the influence of the three-dimensional spatial characteristics.By comparing and analyzing the stability coefficients obtained by the overload method and the strength reduction method under different types of dangerous rocks,a more accurate calculation method is obtained.When using 3D discrete element method to assess the stability coefficient of dangerous rocks including sliding,falling and tilting types,exhibit a closer correspondence with those derived from the rigid limited-equilibrium method.

关 键 词：危岩 稳定性分析 三维离散元 超载法 强度折减法 

分 类 号：TU457[建筑科学—岩土工程]