兰州黄土滑坡与地表水入渗变形关系分析--以皋兰山滑坡降雨入渗试验研究为例

根据对甘肃兰州的皋兰山滑坡降雨入渗试验研究取得实测数据,分析了不同降雨强度下,黄土滑坡体接受降雨入渗的能力及和雨水扩散运动特征、黄土滑坡的变形特征及蠕变强度,研究了地表水不同入渗量对黄土滑坡的破坏程度.     

千将坪滑坡变形特征及其机理研究

通过三维有限元方法研究千将坪滑坡.建立滑坡三维有限元计算模型,模拟库水位上升和降雨过程引起的千将坪滑坡变形破坏机理.对千将坪滑坡在不同工况下的计算结果进行比较分析,得出在库水位上升和降雨条件下的滑坡位移场和塑性区的变化规律,从而揭示千将坪滑坡的整体变形破坏机制.     

支持向量机的时间序列回归与预测

详细分析了支持向量机用于时间序列预测的理论基础。采用支持向量机、RBF和Elman神经网络模型,对仿真时序和工程滑坡变形时序进行了回归与外延预测。结果表明,在噪声水平较低时,SVR回归效果稍好,Elman与RBF网络的稳健性相对较差;随着噪声水平增大,两种神经网络的回归精度迅速下降。对于外延预测,两种神经网络仅限于短期的非线性模拟,而泛化性能更好的SVR在短期具有比较理想的效果,在较长的时间区间里也具有较高的预测精度(7步预测准确度控制在83.5%以上)。     

Assessment and Risk Zonation of Landslides in Panxi Area Based on 3S Technology

0IntroductionThe Panxi Area is situated at the Valley ofJialing River with rich products and hugedeveloping potentials,anditis ani mportant ecolo-gy barrier of maintaining the ecological environ-ment stable of Sichuan Province and even that ofthe whole China[1].At the same ti me,the PanxiAreais an ecology frail area,andits one of obvi-ous expressionsis the frequent occurrence of geo-logical disaster[2,3].According to the investigation[4],there are5148debris flows with drainage area above0.…     

Occurrence Conditions and Process Analysis on Fluidization of Valley Type Landslide： Example of the Fluidization of Landslide in Qiongshan Ravine, Danba

0IntroductionFluidization of landslideindicates the action andprocess of an alivelandslide motion of conver-ting fromsliding state to fluidal disposition due tovibration and watering function occurred in processof landslide’s mediumand high velocity movement.Research onfluidization of landslide is a major sub-ject inthe field of landslide and debris flowstudies,which has a significance of deepening people’s un-derstanding of landslide disaster and rules of debrisflow occurrence.For example,S…     

黔桂铁路西山隧道塌方处理措施

介绍了西山隧道的地质概况和围岩特征,并重点阐述了隧道塌方的情况、原因分析、处理措施及特殊情况下钢轨棚架辅以小导管处理塌方的效果。     

梧州长洲岛竹湾段3号滑坡勘测与治理

滑坡是危害防洪堤安全最常见的一种形式,因此确定堤基是否存在滑动和如何经济地治理滑坡是水利工程设计者最为关注的.基于3号滑坡的特点,运用三种测试手段准确地确定了滑动面,经过对形成滑坡的因素进行分析及稳定性评价,提出可供设计的滑坡整治方案,施工后的防洪堤段经受了百年一遇的洪水侵袭,已安全度汛,说明勘测、设计与治理都是成功的.     

Landslides and Slope Aspect in the Three Gorges Reservoir Area Based on GIS and Information Value Model

Slope aspect is one of the indispensable internal factors besides lithology, relative elevation and slope degree. In this paper authors use information value model with Geo graphical Information System （GIS） technology to study how slope aspect contributes to landslide growth from Yunyang to Wushan segment in the Three Gorges Reservoir area, and the relationship between aspect and landslide growth is quantified. Through the research on 205 landslides examples, it is found that the slope contributes most whose aspect is towards south,southeast and southwest aspect contribute moderately, and other five aspects contribute little. The research result inosculates preferably with the fact. The result of this paper can provide potent gist to the construction of Three Gorges Reservoir area in future.     

滑坡防治的应力重塑方法

对于开挖土方引起的滑坡问题 ,文章提出应力重塑方法对坡面进行初始应力状态的重塑及恢复 ,使得边坡土体回复到原本未开挖的稳定应力状态。应用此方法 ,并与膨胀锚相配合 ,进行滑坡治理 ,可以增加坡面土体的抗滑能力。采用膨胀锚作为阻止土体抗滑的结构措施 ,可使坡面滑坡标本兼治 ,并可大大降低治理滑坡的费用     

三峡工程库区淹锅沙坝滑坡体特征及稳定性分析

淹锅沙坝滑坡位于长江南岸,跨三峡工程坝51.30km,滑坡体上部为土夹碎块石松散堆积体,下部为基岩滑动形成的块裂体,经对滑坡体进行稳定性分析与计算表明,滑坡体目前状态是基本稳定的,在三峡水库蓄水后,滑坡体前部可能失稳,进而影响滑坡体后部的稳定性。