尖石堡滑坡变形监测研究分析

为了研究尖石堡滑坡体变形情况及其稳定状态,对尖石堡滑坡体进行监测研究.尖石堡滑坡体位于重庆市涪陵区,滑坡体平面形态为横长型.采用的主要监测方式为:大地形变监测、滑体深部位移监测、地下水位和孔隙水压力观测、诱发因素监测、宏观地质巡查监测等.监测结果表明:内地表累积位移量为41 mm左右;深部累积位移量为70 mm左右;推力受力变化范围为-0.1～0.2 MPa;裂缝宽度无变化.滑坡体变形速率较缓,滑坡体位移方位角与滑坡体主滑方向大致一致.目前,尖石堡滑坡体整体处于欠稳定状态.     

小浪底库区1#滑坡体稳定性分析及变形监测

小浪底库区1^#滑坡体由于其体积大，稳定性差，对整个水利枢纽的正常运行影响较大，因此其稳定及变形监测显得十分重要。章对该滑坡体的变形破坏特征及成因机制进行了阐述，对其稳定性进行了定性和定量的评价，通过对滑坡体的分析，为变形监测提供了分析依据。     

吉家河滑坡变形实时监测研究

根据对吉家河滑坡的实地考察,制定滑坡变形实时监测方案,在滑坡体上设置10个地表变形监测点,并设置3个钻孔用于滑坡深部变形监测,在钻孔底部埋设孔隙水压力计,用于对滑坡内部孔隙水压力的监测.通过为期14个月的监测及对监测数据的分析,说明吉家河滑坡由南向东向左旋转变形,变形量不大,整体保持稳定.     

小浪底东苗家滑坡体原始状态稳定性分析

针对东苗家滑坡体的地质条件,根据其滑坡体变形特征及多种复杂变形组合破坏形式,选用Sarma法对东苗家滑坡体在原始状态的稳定性进行分析和评价。结果表明:东苗家滑坡体在自然状态下基本处于稳定状态;在Ⅶ度地震烈度条件下,该滑坡体将会失稳;地下水位的变化对滑坡体稳定性具有一定影响,但不起主要作用。     

三峡库区土门子滑坡成因机制分析与稳定性评价

三峡库区土门子滑坡白1992年以来滑坡体蠕动变形持续发展,近期变形进一步加剧造成滑体内公路及房屋破坏.在分析滑坡地质环境和变形特征的基础上,对滑坡的成因机制进行了深入研究,并对滑坡体的稳定性进行评价.结果表明,滑坡体处于整体蠕动变形局部滑移,持续强降雨是诱发其失稳破坏的主导因素,在暴雨工况下,滑坡体处于欠稳定-基本稳定...     

云台山水库滑坡体(含大坝)变形监测系统研究

为了监视云台山水库滑坡体及大坝位移变形,本监测系统布设了水平与高程监测网,检测测站点、工作基点及起测基点的稳定性。经估算,滑坡体与大坝位移标点的观测精度均能满足要求。     

某滑坡变形机理分析及应急治理工程效果评价

在对某滑坡所在区域地质环境分析的基础上,利用极限平衡法和数值模拟方法分析了该滑坡灾害体前部边坡的受力特征、稳定状态,针对该滑坡体的变形破坏机理,提出对滑坡体的应急治理工程措施.在应急治理工程施工完成后,通过对该滑坡工后地表和深孔位移监测,分析了该滑坡当前所处的状态,对应急治理工程的效果做出评价,为该滑坡后期进行彻底治理设计提供了科学的依据.     

枫渡水电站滑坡体变形观测资料分析

通过对枫渡水电站滑坡体的变形观测资料进行整理分析,得出该滑坡体目前的工作性态,并对其稳定性态进行评价.     

边坡灾害监测预警物联网系统及工程应用

为了解决倾斜顺层岩质边坡监测预警所面临的预测困难、监测布点繁多等难题.基于恒阻大变形锚索与滑坡体之间的相互作用力学原理,运用物联网技术,提出了恒阻大变形锚索子系统、双路数据通讯子系统、数据接收处理子系统和智能供电子系统,研发了边坡灾害监测预警物联网系统,完善了监测预警模式,实现了对顺层岩质边坡的加固-监测-预警一体化功能.对本钢集团南芬露天矿"10-0731滑坡"和"10-0805滑坡"的成功预警表明,边坡灾害监测预警物联网系统能够实现对倾斜顺层岩质边坡灾害的超前预警.     

GPS在滑坡外观变形监测中的应用

GPS技术具有全天候、自动化、选点灵活、可同时测定点的三维位置与速率等优点,因而为滑坡监测提供了一种新的有效的数据采集手段。主要介绍了GPS用于滑坡变形监测的方法,并通过三峡库区卡子湾滑坡体的变形监测介绍了GPS滑坡监测的整个过程,包括监测网的技术设计、外业观测、数据处理、变形分析等内容。监测结果表明,采用GPS静态定位技术达到mm级的精度,完全可以满足高精度滑坡监测的要求。     

InSAR技术在地质灾害早期识别中的应用

我国川西地区近年来发生多次7.0级以上地震,诱发大量震裂山体。震裂山体有着高位隐蔽性特点,对灾区人民的生命财产造成了极大威胁。InSAR技术对于识别潜在崩滑地质灾害有着较好的应用效果,本文采用InSAR技术与地表专业位移监测方法对杂谷脑河左岸进行地质灾害识别。研究结果表明:通过InSAR技术识别出该区域存在3处变形体,其中黄泥坝子滑坡在2017年8月10日产生整体滑动,西山村滑坡仍在蠕滑变形,裕丰岩变形体(疑似滑坡体)为蠕滑变形;通过地表专业位移监测结果,显示西山村滑坡变形趋势与InSAR结果一致,验证了InSAR结果的合理性;西山村滑坡体失稳后堆积体运动演化过程具有阶段性特征,即加速滑移阶段、减速滑移阶段、渐进稳定阶段。     

Mechanism analysis of landslide of a layered slope induced by drawdown of water level

1 Introduction The instability of slopes on the river banks and the reactivation of ancient slopes, in- duced by drawdown of water level, are great danger for the local residents and for thehydroelectric engineering. A lot of accidents or disasters relating to the drawdown of water level can be found in literatures. In October 1963, the landslide, near the recently constructed Vajont Reservoir dam at that time, caused the failure of the toppest hyper- bolic arching dam in the world, ruined on…     

Application of remote monitoring technology in landslides in the Luoshan mining area

With the scale extending of mining, the landslide disaster in the earth's surface will become more and more serious, and these landslide disasters are being threatened to the sustainable safe mining of the underground mine and the open-pit mine. Based on the theory that sliding force is greater than the shear resistance (resisting force) at the potential slip surface is the necessary and sufficient condition to occur the landslide as the sliding criterion, the principle and method for sliding force remote monitoring is presented, and the functional relationship between the human mechanical quantity and the natural sliding force is derived, hereby, the natural sliding force can be calculated according to the human mechanical quantity. Based on above principle and method, a new system of landslide remote monitoring is designed and 53 systems are installed on the landslide body in the Luoshan mining area, which make up the landslide remote monitoring network. According to the results of field test around 8 months, monitoring curves between sliding force and time are obtained, which can describe and forecast the develop trend of landslide. According to above analysis, the results show that this system has some following advantages: (1) real-time monitoring; (2) remote intelligent transmission; (3) landslides early warning.     

GPS技术在忠武输气管道沿线滑坡监测中的应用

结合忠武输气管道沿线黄草坡滑坡的监测实例,研究了在地形复杂、观测条件恶劣的山区利用GPS技术进行滑坡监测的可行性,对滑坡变形监测点位的选择,监测网型的设计和数据处理方法进行了分析和总结,通过对黄草坡滑坡长期观测数据的分析研究,评价了GPS监测数据的精度,并对滑坡的变形原因和变形趋势进行分析和预测.     

金沙江结合带巴塘段滑坡群InSAR探测识别与形变特征

金沙江结合带结构破碎,软弱岩层发育,流域性特大高位地质灾害频繁发生。针对该区域开展大范围滑坡调查与监测研究,对减灾防灾具有重要意义。以金沙江结合带巴塘段为试验区,采用堆叠InSAR技术分别利用升轨、降轨Sentinel-1A卫星数据对该区域滑坡隐患开展了调查研究。在此基础上,以中心绒乡滑坡群为重点研究区,利用多维小基线子集技术获取了区域二维形变速率(水平东西向和垂直向)及二维时间序列结果。通过对4处典型滑坡体的形变时间序列结果进行分析,发现在两年时间段内安里克米滑坡、仁娘村滑坡、贡伙村滑坡1和贡伙村滑坡2水平方向累积位移量分别达到44.3、-26.6、65.3和-77.1 mm,垂直向累积位移量分别达到-30.2、-88.3、-80.9和-56.9 mm,且这4处滑坡呈现缓慢蠕滑变形趋势。通过对贡伙村滑坡2的形变监测二维时间序列与降雨数据分析发现,强降雨对滑坡变形有一定短暂影响。由于滑坡群处于地质条件脆弱地区,构造活动强烈,在强降雨条件下极易导致滑坡失稳,建议对其进行持续监测,同时该研究成果对流域内其他区域的滑坡调查与监测研究具有参考意义。     

三峡工程近坝库岸滑坡变形监测方法试验研究

通过试验研究表明：对滑坡变形机制研究或精度要求较高时,采用测量机器人（Georobot）技术是目前最理想的方法;若只对滑坡的长期趋势进行监测或精度要求较低,且滑坡范围较大时,采用GPS技术加测地面边的方法有较大优越性。三峡工程近坝库岸野猫面滑坡宜采用Georobot监测,而黄腊石滑坡监测用GPS加测地面边的方法更好。     

Q mechanism analysis of landslide of a layered slope induced by drawdown of water level

The frequent drawdown of water level YanYangtze River will greatly influence the stability of the widely existing slopes in the Three Gorges reservoir zone, especially those layered ones. Apart from the fluctuating speed of water level, the different geological materials will also play important roles in the failure of slopes. Thus, it must be first to study the mechanism of such a landsllide caused by drawdown of water level.A new experimental setup is designed to study the performance of a layered slope under the drawdown of water level. The pattern of landslide of a layered slope induced by drawdown of water level has been explored by means of simulating experiments. The influence of fluctuating speed of water level on the stability of the layered slope is probed, especially the whole process of deformation and development of landslide of the slope versus time. The experimental results show that the slope is stable during the water level rising, and the sliding body occurs in the upper layer of the slope under a certain drawdown speed of water level. In the process of slope failure, some new small sliding body will develop on the main sliding body, and the result is that they speed up the disassembly of the whole slope.Based on the simulating experiment on landslide of a layered slope induced by drawdown of water level, the stress and displacement field of the slope are calculated. The seepage velocity, the pore water pressure, and the gradient of pore water head are also calculated for the whole process of drawdown of water level. The computing results are in good agreement with the experimental results. Accordingly, the mechanism of deformation and landslide of the layered slope induced by drawdown of water level is analyzed. It may provide basis for treating this kind of layered slopes in practical engineering.