基于随机场理论的反倾斜坡变形演化特征研究  

Characterization of Deformation Evolution of Inverted Slope Based on Random Field Theory

作　　者：张祖国 何立斌 孙淼军 谢良甫[2] ZHANG Zuguo;HE Libin;SUN Miaojun;XIE Liangfu(Zhejiang East China Geotechnical Survey and Design Institute Co.,Ltd.,Hangzhou 310012,Zhejiang,China;College of Architecture and Engineering,Xinjiang University,Urumqi 830046,Xinjiang,China)

机构地区：[1]浙江华东岩土勘察设计研究院有限公司,浙江杭州310012 [2]新疆大学建筑工程学院,新疆乌鲁木齐830046

出　　处：《水力发电》2025年第1期37-42,56,共7页Water Power

基　　金：新疆维吾尔自治区自然科学基金杰出青年科学基金资助项目(2022D01E32)。

摘　　要：基于改进颗粒流的数值模拟方法,建立反倾斜坡土体参数的空间变异性模型,研究土体参数空间变异性对反倾斜坡变形演化过程的影响,对比分析确定性反倾斜坡变形演化和随机场理论反倾斜坡变形演化特征。结果表明:反倾斜坡变形演化分为坡脚初始剪切破坏、剪断面贯通坡体、倾倒破坏起始3个关键节点;土体参数的空间变异性导致反倾斜坡的破坏速度增加,坡脚裂缝和剪断面贯通速度加快;土体参数的空间变异性还使反倾斜坡的前缘和后缘破坏深度增加,而对剪切破坏面与节理面法向夹角、后缘张拉角的影响较小。Based on the improved numerical simulation method of particle flow,the spatial variability model of soil parameters of the inverted slope is established,and the influence of the spatial variability of soil parameters on the deformation evolution process of inverted slope is investigated.The characteristics of the deformation evolution of deterministic inverted slopes and that of the inverted slopes with the random field theory are also compared and analyzed.The conclusions show that:(a)the deformation evolution of the inverted slope is divided into three key nodes of the initial shear damage at the foot of the slope,the penetration of the shear face into the slope body,and the beginning of the tipping damage;(b)the spatial variability of soil parameters leads to an increase in the damage rate of the inverted slope,and accelerates the speed of the cracks at the foot of the slope and the shear face penetration of the inverted slope;and(c)the spatial variability of soil parameters makes the leading and trailing edge damage depth increase,while the effects on the normal angle between the shear damage surface and the nodal surface,and the trailing edge tension angle are smaller.

关 键 词：反倾斜坡 随机场理论 空间变异性 变形演化特征 数值模拟 

分 类 号：P642.2[天文地球—工程地质学]