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【目的】数值模拟方法广泛应用于滑坡灾变力学演化研究中，在滑坡治理过程中发挥着重要作用。为研究滑坡的触发机制，【方法】合理进行模型假设，准确设定边界条件及参数，建立二维动态数值模拟评估方法。以兰新铁路张家庄段滑坡为典型实例，通过GeoSlope、ABAQUS软件进行二维数值模拟，分析滑坡主剖面、滑动带塑性发展过程、滑动区域分布、位移分布、突变前后的增量位移等特征，结合二维极限平衡法以及试验分析滑坡机理。【结果】结果显示：承压水无法作用到滑动带顶部，在顶部滑动面上承压水作用引起的安全系数降低幅度比静水压力作用小；承压水对滑动带底部作用大，底部滑动面上承压水作用引起的安全系数降低幅度比静水压力作用大，安全系数直接降低了0.26。【结论】结果表明：施加承压水压力后，滑动带附近的Mises应力场发生显著变化，应力增量最高可达0.5 MPa,表明承压水作用显著改变了滑坡体内部的应力分布。此外，滑坡体在承压水作用下表现出明显的位移突变特征，坡顶水平位移在折减系数达到1.05时迅速增大，进一步证实了承压水作用对滑坡体稳定性的影响。通过数值模拟结合现场勘察和试验的综合方法和分析，合理地模拟了滑坡在地下水压力等复杂条件下的动态演化规律，对于边坡渐进破坏过程进行稳定性评价以及滑坡可视化动态演示提供了依据。
Abstract：[Objective]The numerical simulation method is widely used in the study of landslide disaster mechanical evolution and plays an important role in the process of landslide control. To study the triggering mechanism of landslide, [Methods]reasonable model assumptions are made, boundary conditions and parameters are set accurately, and a two-dimensional dynamic numerical simulation evaluation method is established. The landslide of Zhangjiazhuang section of Lanzhou-Xin Railway is taken as a typical example. GeoSlope and ABAQUS software are used to analyze the characteristics of landslide main section, slip zone plastic development process, slip region distribution, displacement distribution, and incremental displacement before and after abrupt change, and the landslide mechanism is analyzed by two-dimensional limit equilibrium method.[Results]The result show that the confined water cannot affect the top of the sliding zone, and the reduction of the safety factor caused by the action of confined water on the top sliding surface is smaller than that of the hydrostatic pressure, while the effect of confined water on the bottom of the sliding zone is larger. The reduction of the safety factor caused by the action of confined water on the bottom sliding surface is larger than that of the hydrostatic pressure, and the safety factor is directly reduced by 0.26.[Conclusion]Following the application of confined water pressure, substantial alterations were observed in the Mises stress field adjacent to the sliding zone, with stress increments reaching up to 0.5 MPa.These changes indicated that the action of confined water pressure significantly modified the stress distribution within the landslide mass.Additionally, distinct displacement discontinuities were exhibited by the landslide body under the influence of confined water pressure.Notably, horizontal displacements at the slope crest increased rapidly when the reduction factor reached 1.05.These findings further confirmed the substantial impact of confined water pressure on the stability of the landslide body. Through the comprehensive method and analysis of numerical simulation combined with field investigation and test, the dynamic evolution law of landslide under complex conditions such as groundwater pressure is reasonably simulated, which provides a basis for the stability evaluation of the progressive failure process of slope and the visual dynamic demonstration of landslide.
[1] 杜文杰，盛谦，付晓东，等.地震作用下岩羊村滑坡稳定性与失稳机制研究[J].岩土力学，2020,41(7):2461-2469.DU Wenjie,SHENG Qian,FU Xiaodong,et al.Dynamic stability analysis and failure mechanism of Yanyang village landslide under earthquake.[J].Rock and Soil Mechanics,2020,41(7):2461-2469.
[2] MCCOLL S T.Landslide Causes and Triggers[M].Amsterdam,Netherlands:Elsevier,2022.
[3] ZHOU Chuangbing,CHEN Yifeng,HU Ran,et al.Groundwater flow through fractured rocks and seepage control in geotechnical engineering:Theories and practices[J].Journal of Rock Mechanics and Geotechnical Engineering,2023,15(1):1-36.
[4] KOU Miao,MIAO Miao,LIU,Xinrong,et al.Mechanical properties,failure behaviors and permeability evolutions of fissured rock-like materials under coupled hydro-mechanical unloading[J].Engineering Fracture Mechanics,2021,254:107929.
[5] XU Wensong,ZHAO guangming,LIU chongyan,et al.Evolution mechanism of deformation and failure of surrounding rock during excavation and unloading of the high-stress rock mass[J].Advances in Civil Engineering,2020,2020(22):8863540.
[6] 吴梦喜，杨家修，湛正刚.边坡稳定分析的虚功率法[J].力学学报，2020,52(3):663-672.WU Mengxi,YANG Jiaxiu,ZHAN Zhenggang.A virtual power slope stability analysis method [J].Chinese Journal of Theoretical and Applied Mechanics,2020,52(3):663-672.
[7] 孙明磊，朱永全，李新志，等.超深层黄土滑坡作用下既有隧道结构体系力学特征[J].西南交通大学学报，2022,57(1):148-157.SUN Minglei,ZHU Yongquan,LI Xinzhi,et al.Mechanical characteristics of existing tunnel structure affected by super deep loess landslide [J].Journal of Southwest Jiaotong University,2022,57(1):148-157.
[8] 刘航宇.有限元强度折减法下的岩土边坡稳定分析[J].科技资讯，2024,22(19):251-253.LIU Hangyu.Analysis of geotechnical slope stability under strengthreduction finite element method[J].Science and Technology Information,2024,22(19):251-253.
[9] 张家乐，姚家李，张鲁鲁，等.基于强度折减法深基坑稳定性分析[J].工程与建设，2024,38(5):1075-1078.ZHANG Jiale,YAO Jiali,ZHANG Lulu,et al.Stability analysis of deep foundation pit based on strength reduction method[J].Engineering and Construction,2024,38(5):1075-1078.
[10] 黄俊，赵江，段祥睿，等.基于强度折减法的抗滑桩加固边坡可靠度分析[J].土木与环境工程学报(中英文),2020,42(6):11-18.HUANG Jun,ZHAO Jiang,DUAN Xiangrui,et al.Reliability analysis for soil slopes reinforced with piles using shear strength reduction[J].Journal of Civil and Environmental Engineering,2020,42(6):11-18.
[11] 曹嘉祺，王洪新，王平，等.基于荷载结构法和强度折减法的人防工程安全性评估方法[J].岩土力学，2023,44(7):2105-2114.CAO Jiaqi,WANG Hongxin,WANG Ping,et al.A method for evaluating safety of civil air defense structure based on load structure method and strength reduction method.[J].Rock and Soil Mechanics,2023,44(7):2105-2114.
[12] 卢应发，黄学斌，刘德富.边坡力的分布特征和稳定性分析[J].岩土工程学报，2017,39(7):1321-1329.LU Yingfa,HUANG XueBin,LIU Defu.Distribution characteristics of force and stability analysis of slope[J].Chinese Journal of Geotechnical Engineering,2017,39(7):1321-1329.
[13] 卢应发，杨丽平，华国辉.一种新的节理本构模型及几种新的滑坡稳定系数计算方法[J].岩石力学与工程学报，2013,32(12):2431-2438.LU Yinga,YANG Liping,HUA Guohui.A new joint constitutive model and several new methods of stability coefficient calculation of landslides[J].Chinese Journal of Rock Mechanics and Engineering 2013,32(12):2431-2438.
[14] 丁梓逸，王宇栋，吴兴贵，等.基于ANSYS有限元强度折减法的土质滑坡地震响应特性研究[J].工业建筑，2023,53 (S2):576-582.DING Ziyi,WANG Yudong,WU Xinggui,et al.Study on seismic response characteristics of soil landslide based on ANSYS finite element strength reduction method[J].Industrial Construction 2023,53(S2):576-582.
[15] CAO V H,GO G H.A novel approach to stability analysis of random soil-rock mixture slopes using finite element method in ABAQUS[J].Natural Hazards,2024,120(15):14381-14407.
[16] 曾成，冯涵璐，王仁超.基于原型监测与数值计算的管道边坡灾害安全评估与分析[J].水利水电技术(中英文),2024,55(4):36-47.ZENG Cheng,FENG Hanlu,WANG Renchao.Pipeline slope disaster safety evaluation and analysis based on in-situ monitoring and numerical calculations[J].Water Resources and Hydropower Engineering,2024,55(4):36-47.
[17] 张世殊，胡新丽，章广成，等.西部高山峡谷区重大滑坡成生规律及灾变演化机理研究进展 [J].地质力学学报，2024,30(5):795-810.ZHANG S S,HU X L,ZHANG G C,et al.Formation and catastrophic evolution of giant landslides in the alpine canyon area of western China[J].Journal of Geomechanics,2024,30(5):795-810.
[18] ZHONG Wei,ZHU Yuanjia,HE Na.Physical model study of an intermittent rainfall-induced gently dipping accumulation landslide[J].Water,2022,14(11):1770.
[19] 聂兵其，贾向新，茆玉超，等.基于传递系数法的某滑坡稳定性分析及评价[J].土工基础，2024,38 (3):369-372.NIE Bingqi,JIA Xiangxin,MAO Yuchao,et al.Stability analysis and evaluation of a landslide based on transfer coefficient method[J].Soil Engineering and Foundation,2024,38 (3):369-372.
[20] BEDNARIK M, YILMAZ I, KRALOVIČOVÁ L.Deterministic approach to assess landslide susceptibility and landslide activity in the Central-Western Region of Slovakia[J].Bulletin of Engineering Geology and the Environment,2024,83(8):327.
[21] 王卫华，李坤，秦亚光，等.岩体力学强度参数选取方法研究[J].合肥工业大学学报(自然科学版),2017,40 (10):1389-1393.WANG Weihua,LI Kun,QIN Yaguang,et al.Method of parameter selection of rock mass mechanical strength[J].Journal of Hefei University of Technology(Natural Science),2017,40 (10):1389-1393.
[22] 龚礼岳，方如胜，胡献竹，等.基于IGA-AK代理模型的边坡安全系数预测与滑动面定位研究[J].中国安全生产科学技术，2024,20 (S1):169-178.GONG Liyue,FANG Rusheng,HU Xianzhu,et al.Research on slope safety factor prediction and sliding surface location based on IGA-AK surrogate model[J].Journal of Safety Science and Technology,2024,20 (S1):169-178.
[23] 陈逢慧.基于数值模拟的含软弱夹层矿山边坡降雨渗流特征及稳定性分析[J].工程技术研究，2024,9 (14):29-31.CHEN Fenghui.Analysis on the rainfall seepage characteristic and stability of mine slope with weak interlayer based on numerical simulation[J].Engineering and Technological Research,2024,9(14):29-31.
[24] 邱军领，贾玎，赖金星，等.含裂隙土质隧道降雨入渗双通道渗流模型 [J].岩土工程学报，2025,47(3):548-558.QIU Junling,JIA Ding,LAI Jinxing,et al.Rainfall infiltration two-channel seepage model of soil tunnel with fissure[J].Chinese Journal of Geotechnical Engineering,2025,47(3):548-558.
[25] 赵国庆，杨宇友，孟素云.圆形竖井承压水破坏机理：试验和数值模拟研究(英文)[J].Jourl of Central South University,2020,27 (1):256-266.ZHAO Guoqing,YANG Yuyou,MENG Suyun.Failure of circular shaft subjected to hydraulic uplift:Field and numerical investigation[J].Jourl of Central South University,2020,27 (1):256-266.
[26] JIA Lan,WANG Jiaqi,FANG Linhao,et al.Study on numerical simulation of groundwater flow field and slope stability in multi-aquifer open pit mine.[J].Scientific Reports,2024,14(1):31088.
[27] NARAYANAMURTHI V,RAMASAMY A.Comparison of three groundwater models with finite element methods for groundwater head simulation[C]//KRISHNA R R.International Conference on Civil Engineering Innovative Development in Engineering Advances.Singapore:Springer Nature Singapore,2023:469-476.
[28] ZHONG Qiming,CHEN Lingchun,MEI Shengyao,et al.Numerical investigation of hydro-morphodynamic characteristics of a cascading failure of landslide dams[J].Journal of Mountain Science,2024,21(6):1868-1885.
[29] 宋二祥.条分法计算边坡稳定安全系数的定义：关于“稳定安全系数计算公式中荷载与抗力错位影响探讨”的讨论[J].岩土工程学报，2021,43 (11):2142-2143.SONG Erxiang.On the safety factor definition of slope stability calculated by the slices method:Discussion on “Discussion of dislocation phenomena of resistance and load in formula for stability safety factor”[J].Chinese Journal of Geotechnical Engineering,2021,43 (11):2142-2143.
[30] LI Yu,ZHONG Qiming,WU Hao,et al.Numerical simulation of landslide-generated waves based on multiphase smoothed particle hydrodynamics method with a case study of Wangjiashan landslide[J].Environmental Earth Sciences,2025,84(1):35.
[31] RAY A,RAI R,SINGH T N.Numerical study of the effect of water on the flow behaviour of landslide-generated debris[J].Indian Geotechnical Journal,2024,54(2):441-460.
[32] PATCHAMATLA J R R,EMANI P K,KUMAR R.Dynamic axle load effects on high-speed railway embankment:Pore pressure and deformation in varied subsoils[J].Geotechnical and Geological Engineering,2024,42(5):3561-3578.
[33] CHEN Xuejian,LI Dianqing,TANG Xiaosong,et al.A three-dimensional large-deformation random finite-element study of landslide runout considering spatially varying soil[J].Landslides,2021,18(9):3149-3162.
[34] 蔡荣坤，戴自航，徐根连，等.降雨对花岗岩风化层路堑边坡滑动模式影响：以福建云平高速云霄段为例[J].中国地质灾害与防治学报，2021,32(2):27-35.CAI Rongkun,DAI Zihang,XU Genlian,et al.Influence of rainfall on sliding modes of cutting slope of weathered granite stratum:Taking Yunxiao section in the Yunping freeway in Fujian for example[J].The Chinese Journal of Geological Hazard and Control 2021,32(2):27-35.
[35] 李白露.某邻近滑坡山区铁路大桥边坡变形监测[J].铁道勘察，2024,50(3):28-33.LI Bailu.Slope deformation monitoring of railroad bridge in mountainous area adjancent to a landslide[J].Railway Investigation and Surveying,2024,50(3):28-33.
[36] 刘航源，陈伟涛，李远耀，等，2024.基于 EEMD-CNN-LSTM 的新型综合模型在滑坡位移预测中的应用 [J].地质力学学报，30(4):633-646.LIU H Y,CHEN W T,LI Y Y,et al.Application of integrated model based on EEMD-CNN-LSTM for landslide-displacement prediction[J].Journal of Geomechanics,2024,30(4):633-646.
基本信息:
DOI：10.13928/j.cnki.wrahe.2025.12.014
中图分类号:P642.22
引用信息:
[1]董健麟,卢应发.基于动态演化规律及数值模拟方法的滑坡机理研究[J].水利水电技术(中英文),2025,56(12):174-188.DOI:10.13928/j.cnki.wrahe.2025.12.014.
基金信息:
国家自然科学基金项目(42071264,41641027); 三峡后续工作地质灾害防治项目(0001212015CC60005)