西宁市林家崖滑坡稳定性研究

林家崖滑坡是一个具有上下两个滑体的滑坡系统,本文首先阐述其特性,对其变形控制因素及机理进行分析研究,并将常规Sarma法和基于Sarma法的基本原理的一种新的计算公式结合起来对该滑坡系统的稳定性进行了分析研究。指出,对于这种双层滑体滑坡,在进行稳定性分析时应视情况而增加考虑上滑体滑动效应,以使结果更合理,为滑坡治理设计提供更科学的依据。     

白水峪水电站右岸坝下游边坡岩体的RMR-SMR分类及稳定性评价

本文简要介绍了边坡岩体分类的RMR-SMR系统。结合白水峪边坡, 通过自然历史分析和稳定性计算, 讨论了运用SMR系统进行边坡岩体分类的改进意见。     

粘质海底稳定性实例分析

本文对南海珠江口盆地大陆架区和东海浙江沿岸象山港的粘质海底进行了稳定性分析。通过实例分析判定了该地区不稳定性的原因, 并给出了稳定性估计的直观图。文中还指出了今后研究的方向。     

An historical review of landslide research in the South Wales coalfield

Summary The areal density of landslides in the coalfield of South Wales is one of the highest in the UK. During the past 100 years landsliding has had considerable impact, causing structural damage and loss of life. Most of the landslides were initiated under periglacial conditions but many became reactivated due to the activities of humans, particularly during the late 19 th century when widespread urban and industrial development commenced in the Welsh valleys. A number of the area's larger landslides are first-time slides which occurred during the past 100 years. This paper sets out to chart the history of landslide research in the coalfield, which began through work by mining engineers.     

澜沧江中下游斜坡稳定性分区与综合评价

本文根据澜沧江中下游斜坡稳定性模糊综合评判结果，结果斜坡变形破坏特征，将澜沧江中下游地区划分出二个大区和十个亚区，并综合评述了各区动力环境特征和斜坡稳定状况。     

Stability of waste spoils in an area strip mine—geological and geotechnical considerations

Results of investigations into the stability of coal mine spoil consisting of thick clay, saturated sand, and shale overburden in an areal strip mine are presented. Atterberg limits, particle size distributions, and compaction tests were performed to provide index characteristics of the materials. Unconsolidated undrained and consolidated undrained triaxial compression test results on 10·2 cm diameter samples of compacted shale and shale-soil mixtures were used to investigate the short-term and the long-term conditions respectively of the spoil slope. There is evidence that the failure envelope of mine spoil made up of shale or shale-soil mixture is curved. However, stability analyses reveal that the use of strength parameters defined by a linear Mohr-Coulomb envelope yields results that are comparable with those obtained when the non-linear failure envelope is used, provided that such strength parameters are defined at the operating normal stress level on the failure surface. The study illustrates a very good case of spoil instability resulting from very thick overburden soils of low strength and high water content. Results show that the key to achieving stability in such areas lies in an almost total segregation of the soils from the rocks.     

Salt marsh cliff stability in the oosterschelde

Salt marsh cliff erosion in the Oosterschelde, due to basal scour and small-scale failure, was monitored during a two-year period using reference stakes. The composite marsh cliffs have a cantilever profile. Their stability is evaluated from beam failure analysis. A model is proposed, in which the cantilever weight is taken as the motive force; the major resistive force is the tensile strength. By substituting height, undermining width and soil mechanical properties of the cliff in the model, one can identify the cliffs that are likely to fail. Salt marsh cliffs, which combine a large tensile strength due to roots at the top of the profile with a large compressive stress at the cliff base due to the sandy texture of the subsoil, display the highest resistance to beam failure. The critical cliff dimensions, observed in the field, correspond with the values calculated from the proposed model of beam failure.     

A generalized probabilistic approach for slope analysis

Summary A new probabilistic approach is introduced for slope stability analysis, which is general in types of variable distributions and correlations or dependency between variables, and flexible enough to include any adverse impact analysis for blasting vibrations and groundwater conditions.The material strength within a slope area, given in terms of the internal friction angle (ø) and cohesion (c), is randomized in the bivariate joint probability analysis. To be a completely general engineering method, the new probabilistic approach employs the random variable transformation technique: the Hermite model of the Gaussian transformation function, which transforms the experimental histogram of shear strength parameters to the standard Gaussian distribution (=0, ²=1.0).Because a binormal joint probability is analysed on the true probability region projected on the plane of the Gaussian transformed variables, it is an exact solution of slope stability based on the available sample data. No assumption on the shape of the experimental histogram or independency between two random variables is made as in the current probability methods of slope analysis.     

Influence of rainfall-induced wetting on the stability of slopes in weathered soils

Shallow failures of slopes in weathered soil are caused by infiltration due to prolonged rainfall. These failures are mainly triggered by the deepening of the wetting band accompanied by a decrease in matric suction induced by the water infiltration. This paper reports trends of rainfall-induced wetting band depth in two types of weathered soils that are commonly found in Korea. Both theoretical and numerical analyses for wetting band depth are presented based on the soil–water characteristic curve obtained using filter paper as well as tensiometer tests. It is found that the magnitude of wetting front suction plays a key role in the stability of slopes in weathered soils. Theoretical analysis based on modified Green and Ampt model tends to underestimate the wetting band depth for typical Korean weathered soils. It was also deduced that for Korean weathered soils, the factor of safety drops rapidly once the wetting band depth of 1.2 m reached.     

GPS-RTK技术监测露天矿边坡的研究与实践

介绍了GPS—RTK露天矿边坡监测系统基本情况，阐述了GPS—RTK技术监测露天矿边坡的过程及技术要点。