用VB6开发滑坡稳定性计算软件     

徐洪恩  舒洪平 《地质灾害与环境保护》2007,18(2):100-103

从VB6开发滑坡计算软件模块设计到程序编写作了一个较为详细的阐述.为勘察设计人员提供开发所需的CAD2002、ACCESS2000及EXCEL2000的调用方法和软件接口子程序.通过实际应用说明,对于在滑坡勘察中编制符合各行业、各地区不同规范要求的滑坡计算软件有很高的参考价值.  相似文献   

A basal slip model for Lagrangian finite element simulations of 3D landslides          下载免费PDF全文

Massimiliano Cremonesi  Francesco Ferri  Umberto Perego 《国际地质力学数值与分析法杂志》2017,41(1):30-53

A Lagrangian numerical approach for the simulation of rapid landslide runouts is presented and discussed. The simulation approach is based on the so‐called Particle Finite Element Method. The moving soil mass is assumed to obey a rigid‐viscoplastic, non‐dilatant Drucker–Prager constitutive law, which is cast in the form of a regularized, pressure‐sensitive Bingham model. Unlike in classical formulations of computational fluid mechanics, where no‐slip boundary conditions are assumed, basal slip boundary conditions are introduced to account for the specific nature of the landslide‐basal surface interface. The basal slip conditions are formulated in the form of modified Navier boundary conditions, with a pressure‐sensitive threshold. A special mixed Eulerian–Lagrangian formulation is used for the elements on the basal interface to accommodate the new slip conditions into the Particle Finite Element Method framework. To avoid inconsistencies in the presence of complex shapes of the basal surface, the no‐flux condition through the basal surface is relaxed using a penalty approach. The proposed model is validated by simulating both laboratory tests and a real large‐scale problem, and the critical role of the basal slip is elucidated. Copyright © 2016 John Wiley & Sons, Ltd.  相似文献   

长江三峡香溪—莲沱段水土流失的研究     

林承坤 《山地学报》1989,(3)

长江三峡香溪—莲沱段的水土流失可分为水蚀与重力侵蚀两类。据诸多自然地理因素的定量指标与产沙模数的关系,建立了产沙模数的经验公式[即式(1)],用式(1)计算出区内产沙量。据历史记载资料与地质地貌调查,探讨了区内新滩与链子崖的巨型崩塌-滑坡的成因与发展。在此基础上,研究了区内水土流失对自然环境及三峡工程的影响。  相似文献   

论基岩滑坡的临床聚能与启程弹冲     

胡广韬  毛彦龙  杨建宏 《地球科学与环境学报》1992,(4)

剧动式高速滑坡是一种大量存在于自然界中的地质灾害。本文以广家崖斜坡危岩体为例,对基岩滑坡的“临床聚能”和“启程弹冲加速效应”进行了理论分析和探讨。文中详细论证了斜坡岩体滑落破坏时所具有的“启程弹冲加速效应”,并提出了二维应力状态下的启程冲速度计算公式。 启程弹冲机理,主要是锁固段岩体内聚力作用和岩体聚集赋存弹性应变能释放的反应,弹冲速度与内聚力的大小有直接关系。岩体一旦剪断破坏,弹性应变能骤然释放,岩体表现出剧烈的弹性回冲,弹性应变能便瞬间转化为岩体滑动的弹冲动能。这便从理论上对高速滑坡提出了具有实际意义的新机理。  相似文献   

滑体的运动变形及观测要点     

李沛  陈自生  刘正荣 《山地学报》1991,(4)

滑体运动变形特征是建立滑坡观测系统的主要依据。前者受控于滑面类型。1.直线型滑面上的滑体作整体运动,运动具等效效应;内部变形微弱,观测重点在地表位移;2.折线型滑面上的滑体亦作整体运动,变形较强,观测重点在深部位移和变形;3.凹弧型滑面上的滑体作整体旋转运动,变形较弱,观测重点在后缘和前缘;4.凸弧型滑面上的滑体作破碎旋转运动,变形较明显,观测重点在地表(尤其是剪出口处);5.复合型滑面上的滑体作分级分块运动,变形强烈,宜作综合观测。  相似文献   

Slope Instability Zonation: a Comparison Between Certainty Factor and Fuzzy Dempster–Shafer Approaches     

Binaghi  E.  Luzi  L.  Madella  P.  Pergalani  F.  Rampini  A. 《Natural Hazards》1998,17(1):77-97

This paper presents a comparison between two methodologies for the evaluation of slope instability and the production of instability maps, using a probabilistic approach and a hybrid possibilistic and credibilistic approach. The first is the Certainty Factor method, and the second is based on Fuzzy Logic integrated with the Dempster–Shafer theory. These methodologies are applied to the 1 : 50,000 scale Fabriano (Marche, Italy) geological map sheet. The results are represented as histograms where the accuracy of the prediction is shown, and the comparison of the results of the methods is discussed.  相似文献   

王峪口水库库岸滑坡特征及形成机制   总被引：2，自引：2，他引：0  

范俊喜  侯建军  许银贵 《山地学报》1998,(4)

王峪口水库库岸滑坡地层主要为一套上新统砾石层、夹砂层、粘土层．区内滑坡具有明显的分期性与群发性特点．滑坡形成的主要原因是该套地层夹有饱水软化的粘土层和易于液化的饱水砂层;地震则可能是其触发因素．  相似文献   

地震动触发滑坡体滑动的机理   总被引：2，自引：0，他引：2  

毛彦龙  胡广韬  赵法锁  毛新虎 《地球科学与环境学报》1998,20(4):45

论证并探讨了地震动触发滑坡体滑动的机理,认为地震时的坡体波动振荡在斜坡岩土体变形破坏过程中产生三种效应：累进破坏效应、启动效应和启程加速效应,并得出了一些既有理论研究意义,又有一定实际应用价值的论断。  相似文献   

HYDROGEOLOGY     

《Abstract of Chinese Geological Literature》2014,(3)

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level  相似文献   

ENGINEERING GEOLOGY     

《Abstract of Chinese Geological Literature》2014,(3)

正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.)  相似文献