Remote Sense and GIS.Based Division of Landslide Hazard Degree in Wanzhou District of the Three Gorges Reservoir Area

An evaluation model divided landslide hazard degrees in Wanzhou District of Three Gorges Reservoir Area. The model was established by GIS techniques and took land use/cover, stratum characters, slope aspect, slope gradient, elevation difference and slope shape as evaluation factors. The data of land use/cover were obtained by remote sensing, and the weights of the factors mentioned above were established by the analytic hierarchy process （AHP）. The results indicate, low danger areas in the studied area account for 66.51%, and high danger areas and very high danger areas occupy 1/3 of the total area. The regions of high and very high danger are mainly located around the urban area of Wanzhou District and on the banks of the Yangtze River with a relatively large area, where collapse and landslide directly threats densely populated areas and Three Gorges Reservoir. Slope destabilization, if occurs, will bring huge loss to social economy. All research results are consistent with the actual conditions; therefore, they can be regarded as a useful basis for planning and constructing of the reservoir area.     

Analysis of Danba Landslide

This paper using finite element method analyzed present slope and contrasted it with the original slope shape, plastic deformation figures and stress changes. At the same time, some deformation figures and stress figures were got, and the potential sliding surface and the stability coefficient were calculated. The conclusions are： This slope is provided with sliding conditions and began to slide when its foot was cut without any support in time. At the foot of the slope, some support measures must be taken to keep the slope steady and the slope surface need to be stabilzed to protect the lower people. These suggestions and conclusions are also useful to the slope constructions and succeeding inspecting works.     

泰宁县梅口乡吊桥新村滑坡稳定性分析及其治理

分析了吊桥新村滑坡体的规模、类型、成因,通过定性、定量方法探讨其稳定性,并提出相应的治理方案.研究表明,该滑坡的滑坡类型属土质、浅层、牵引式工程滑坡.滑坡体目前处于极限平衡状态,在连续降雨或暴雨等的影响下,有可能造成整体快速下滑.建议采取排水、支挡护坡等综合治理方法进行治理,并进行滑坡体位移监测.     

抗滑桩与滑坡体相互作用的非线性有限元研究

应用三维非线性有限元方法对滑坡在抗滑桩加固前后的稳定性进行计算，分析了抗滑桩的加固效果；并结合工程实例．计算分析抗滑桩受力、变形及其截面应力等工作效应，为同类工程计算及措施选择提供参考．     

基于非接触式光学测量的滑坡模型位移测试

提出一种基于非接触式光学测量技术的滑坡物理模型试验位移测试方法，结合模型试验平台具体环境进行改进，并应用该方法记录下某滑坡模型在不同水位运营状态下的位移发展情况．     

基于GIS的滑坡信息管理和预测预报系统的设计

探讨了基于GIS的滑坡信息管理和预测预报系统的设计。该系统以GIS软件MapInfo为平台，将与滑坡发生有关的多种数据进行存储、管理和分析，然后在充分考虑滑坡稳定性与各因素之间的统计相关性和位置相关性的基础上，建立滑坡影响因子叠加预测模型和神经网络预测模型。该系统不仅可以有效地管理滑坡数据，而且可以进行滑坡预测预报，为决策提供依据。     

Spatial hazard analysis and prediction on rainfall—induced landslide using GIS

The application of landslide hazard model cou-pled with GIS provides an effective means to spatial hazard analysis and prediction on rainfall-induced landslides.A modified SINMAP model is established based upon the sys-tematic investigation on previous GIS-hased landslide analy-sis models.By integrating the landslide deterministic model with the hydrological distribution model based on DEM,this model deeply studied the effect of underground water dis-tribution due to reinfall on the slope stability and landslide occurrence,including the effect of dynamic water pressure resulting from the dowm slope seepage process as well as that of static water pressure.Its applicability has been testified on the Xiaojiang watershed,the rainfall-induced landslides widespread area in Southeast China.Detailed discussion WAS carried out on the spatial distribution characteristics of landslide hazard and its extending trend,as well as the quantitative relationship between landslide hazard with pre-cipitation,slope angle and specific catchment area in the Xiaojiang watershed.And the precipitation threshold for landslide occurrence was estimated.These analytical results are proved useful for geohazard control and engineering decision-making in the Xiaojiang watershed.     

预应力锚索抗滑桩在公路滑坡中的应用

在对公路滑坡体滑动分析的基础上，结合理论计算分析，提出了合理的预应力锚索抗滑桩防治技术．     

一种典型黄土滑坡的滑距预测方法

针对“典型黄土滑坡”的特征，如分布于黄土台塬(高阶地)边；具有“上部黄土，下部基岩”的坡体结构；台塬面相对平整，且长期进行农业灌溉(大于15年)；滑动体沿黄土下部隔水层，基岩顶部或基岩内部软弱层面滑动；台塬边无阻碍滑动体滑出的障碍物，即具有良好的临空条件；滑坡发生在无地震活动期，或说滑坡由自身重力、降雨、地下水及冻融作用而产生等状况收集了20组与滑坡滑动距离有关的资料，以多元回归分析理论为基础，建立了滑距预测模型。该模型图具有较强的针对性和较小的适用范围，并考虑了多种影种因素，故具有较高的准确性和广泛的实用性。     

本钢某矿排土场边坡稳定性分析

以本钢某矿排土场边坡发生滑动后的现状稳定性为研究对象，在已有的勘察资料的基础上，分析了该滑坡产生的原因和破坏模式，并采用剖面反算法对滑带土的力学参数进行反演分析；运用推力法对恢复后的原状和破坏后现状进行了稳定性分析；对其影响因素进行了稳定性和敏感性分析，并将其按影响大小排序。分析结果表明：排土场处于暂时稳定阶段。