露天矿边坡动态整治方法及其应用--以福建潘洛铁矿滑坡整治为例

露天矿边坡属于人工边坡,它的形成不仅时间长,而且一直处于动态过程中。露天矿滑坡在一定范围内是允许的,滑坡治理的目的是保证矿山在开采期限内安全采出设计境界内的矿石。基于这些特征,在文中提出了适合露天矿滑坡治理的新方法-动态治理法及其可行性,并以潘洛铁矿露天矿滑坡灾害治理为例,对该方法的应用进行了论述。可为露天矿滑坡治理所借鉴。     

秦望山隧道南口高陡岩质边坡稳定性分析及治理效果评价

滑坡作为一种常见的地质灾害严重影响工程的安全与稳定和人类的生命财产安全。边坡稳定性受岩土体力学性质、地形地貌条件和周边环境等因素影响。本文以秦望山岩质边坡为研究对象,采用3DEC数值模拟软件分析了边坡治理前后不同工况下边坡的稳定性。稳定性分析结果表明治理加固后各工况下坡体位移均明显减小;通过对治理后滑坡的裂缝变形和锚索应力监测数据进行分析,验证了边坡治理措施的有效性。     

以金竹寨滑坡治理工程为例浅谈预应力锚索在风景名胜区滑坡治理中的应用

龙胜梯田金竹寨发生滑坡地质灾害,边坡治理迫在眉睫。本文就预应力锚索在该滑坡治理工程中实际应用作了介绍,金竹寨滑坡的预应力锚索治理达到了灾害除、工期短、地貌恢复好的效果,是风景名胜区滑坡地质灾害治理的一个较为典型案例。     

云南省宜良县某边坡不稳定性因素分析及治理方案研究

研究区为云南省宜良县某一村庄内的边坡,因地层岩性松散、降雨、地下水压力及村民工程活动,导致边坡失稳形成滑坡。通过实地勘察、室内试验与相似工程类比研究分析该滑坡的滑动机理,采用极限平衡法计算边坡稳定性,设计挡土墙和抗滑桩两种治理方案,经对比,确定挡土墙加排水沟为该滑坡治理措施,并对治理后的滑坡进行稳定性计算,得出该治理方案合理、经济、有效。     

浅谈抗滑桩及预应力锚索在边坡治理中的综合应用

论文较详细地论述了郴州市107国道一住宅楼旁公路边坡滑坡治理工程的设计及施工概况。重点是抗滑桩及预应力锚索的联合应用，获得了治愈滑坡的良好效果。文中分别介绍了边坡治理工程设计的原则及其治理措施－边坡开挖、边坡加固、边坡排水及边坡环境保护；抗滑桩的施工工艺－成孔步骤、钢筋笼的制做与安装、抗滑桩桩芯砼浇注，预应力锚索的施工工艺等内容。论文不仅对治理工程进行了恰如其分的效果评述，并提示同行应注意的问题。     

向家坡滑坡综合治理研究

针对渝黔高速公路路堑边坡向家坡滑坡综合治理工程实例,首先通过对该边坡前期滑动及不成功治理过程介绍,结合地表位移监测和详细的地质勘探,准确地判断了路堑边坡滑坡病害性质、滑坡机例,总结了前期治理失败的原因;然后将滑体与前期支挡工程视为桩土复合体进行了稳定性分析;最后制定了临时防治与永久根治相结合的多途径的综合治理方案。成功的实践表明,这是一种既安全可靠、又经济合理的路堑边坡滑坡综合整治措施。     

相邻基础施工诱发滑坡机制研究

以省水文二队南部填土边坡为例 ,对边坡滑坡机制进行了研究。结果表明 ,滑坡受地形地貌和物质结构条件控制 ,受相邻基础施工和降雨诱发而形成的滑坡。在此基础上 ,作者提出了滑坡治理措施。     

漳龙高速公路路堑边坡滑坡治理

结合漳龙高速公路K67＋955－K68＋005段路堑边坡滑坡治理工程实例，通过对边坡滑动发展阶段的地表位移监测和详细的地质勘探，准确地判断了路堑边坡滑坡病害性质，产生原因及滑动画位置，提出了这种破碎岩石高边坡的稳定性分析和治理工程设计计算方法。成功的实践表明，这是一种即安全可靠，又经济合理的路堑边坡滑坡综合整治措施。     

万梁高速公路J合同段3#边坡滑坡机理探讨

根据万梁高速公路J合同段3#边坡滑坡的发生、发展及演变过程,深入地分析了缓倾斜、顺层顺向的层状岩质边坡在人工开挖卸载过程中产生滑坡的机理,提出了层状岩质边坡发生滑坡的双面剪切效应和连动效应,与模型试验的结果非常吻合,可为有效治理这一类型的滑坡提供科学依据。     

通江县沙窝寺滑坡变形破坏分析及防治设计

随着我国山区公路建设的加快,许多公路的修建无法避免会引起边坡灾害,本文以通江县两河口乡沙窝寺滑坡工程为例,通过分析边坡变形历史、滑坡体边界特征及坡体稳定性,得出滑坡体处于缓慢蠕变阶段,属于中型土质滑坡,在遭遇20年一遇强降雨情况下,坡体处于不稳定状态,有可能再次发生滑动。根据滑坡体分布范围、危险区范围、滑坡性质,提出采用桩板墙与后缘裂缝填埋并设置排水沟的治理措施,可以很好地抑制边坡变形,为此类滑坡的治理提供参考,为公路边坡的治理提供示范作用。     

河北省顺平县李思庄滑坡稳定性分析

李思庄滑坡为河北省顺平县境内潜在危险性最大的一残坡积堆积层滑坡,近年由于削坡建房,滑坡稳定性降低,极端降雨条件下存在复活可能。在野外调查确定滑坡结构特征的基础上,采用改进Mein-Larson降雨入渗模型分析不同降雨强度及持时对李思庄滑坡安全系数影响,运用有限差分软件FLAC3D计算分析该滑坡在天然和极端降雨工况下的稳定状态。研究结果表明:天然状态下,边坡潜在滑移面为基岩与残坡积层分界面,边坡安全系数为1.18,未发生失稳破坏;随降雨历时增加,潜在滑移面由基岩与残坡积层分界面转移到湿润峰面,当湿润峰达到基岩与残坡积层分界面,边坡安全系数为0.83,属不稳定状态。并对李思庄滑坡初步提出设置挡土墙和截排水沟的治理建议。      

宝鸡市黄土工程边坡抗滑挡墙防治失效问题研究

论文基于对陕西省宝鸡市黄土工程边坡防护工程的系统调查测绘,针对普遍存在的抗滑挡墙防治失效问题进行了研究,提出了抗滑挡墙3种失效模式:黄土泥流越顶、墙体剪切破坏和挡墙“坐船随行”。以岭南滑坡抗滑挡墙防治失效为例,开展了黄土土力学测试,运用极限平衡法对滑坡推力进行了复核,分析了不同失效模式对应的成因机制。研究表明:（1）黄土工程边坡失稳多受工程切坡和降雨的双重影响。（2）坡面排水系统不完善、表层土体松散、降雨及坡体局部存在积水洼地是导致黄土泥流发生的主要影响因素;挡墙有效埋深不足是发生“坐船随行”的主因。（3）最后对解决黄土工程边坡抗滑挡墙失效问题进行了对策探讨。     

桩板墙不同类型挂板的技术经济比较

桩板墙是边坡和滑坡治理工程中常用的支挡结构形式,不同类型的挂板方式在结构受力、经济效益和环境保护等方面有显著差异。针对西部山区城市土地开发过程中的工程滑坡治理问题,基于技术经济比选阐明了桩板墙挂板类型和适用性。以兰雅星河湾项目为依托,分析了该滑坡的变形特征和治理工程总体设计,重点对桩板墙挂板方式优化比选进行详细阐述。     

降雨与开挖联合作用下边坡位移矢量及速率变化分析——以韩江高陂水利枢纽右岸尾水渠边坡为例

对临时边坡坡脚下挖和逐级浇筑砼挡墙支护的水利枢纽尾水渠工程而言,如何在雨季利用强降雨间隙高强度开挖基坑后浇筑回填即起支挡加固作用而不至引发大规模滑动破坏,是此类工程中优先考虑的问题。工程实践中采用信息化施工成功与否很大程度上依赖于滑坡变形过程及位移矢量关系分析及精细施工组织。本文以韩江高陂水利枢纽右岸边坡为例,在工程地质条件分析基础上,通过对尾水渠挡墙基坑开挖中边坡变形监测数据分析,得到多个监测点矢量时空变化关系,验证了边坡变形过程中的顺时针压扭式固结排水破坏机制。结合降水资料分析,得到边坡变形与降水和开挖的对应关系。结果表明,边坡日均位移速率v与日均降水量p之间的统计关系式为v=103.45ln(p)-82.821,非强降雨时段主要由坡脚开挖引发的平均位移速率可达200 mm ·d-1。上述破坏模式和监测分析结果为尾水库挡墙信息化施工提供了依据,从而为该工程在雨季达到施工安全提供了保证。     

Investigation on the geological and geotechnical factors leading to a major slope failure at a selected site on a Jordanian highway

During and after the very wet 1991/1992 winter experienced in Jordan, significant slope failures occurred along several sections of the new Irbid-Amman highway in Jordan. The topography over most of the route is hilly, and significant amounts of cut and fill were used to construct the highway. One such slope failure lies at 44+800 km on the highway south of Jerash City at a distance of about 5.0 km from Wadi Zerqa bridge. A landslide occurred downslope of the highway embankment resulting in a collapse of the most of the gabbion wall supporting the embankment. This paper deals with the overall stability of the slope at 44+800 km. It presents the geological and geotechnical studies carried out at this site, identifies the causes and mechanism of instability, and presents appropriate remedial measures. The study concluded that the landslide movement occurred within the colluvium material. It resulted primarily from excess piezometric pressures generated within the slope as a direct consequence of inadequate drainage. It is recommended to reconstruct the entire gabbion wall with its foundation seated on the sandstone that underlies the colluvium and to install a surface drainage system at the site.     

施工诱发边坡失稳变形机制及应急治理对策

通过对香溪大道失稳边坡地质灾害调查,对边坡的地形地貌、地层岩性、岩体结构、原设计方案与施工过程进行研究,在此基础上通过FLAC3D数值模拟,结合工程地质条件分析,对原格构挡墙逆作法施工诱发边坡牵引式滑动过程进行了分析,并对其变形破坏机制进行深入探讨。研究结果表明:边坡变形受工程地质条件控制作用明显,边坡开挖改变了坡体原来的力学平衡条件,为边坡变形失稳创造了客观条件;由于超开挖施工,受格构挡墙自重作用,下部支撑岩体受压破坏,导致格构挡墙失稳下沉,带动其后坡体变形,形成牵引式滑动;随着坡体滑移的发展,边坡将逐渐拉裂破坏并形成贯通的剪切滑动面,从已施工的格构挡墙下部贯通剪出,最终整体失稳破坏;基于破坏机制分析的应急治理措施将重点放在为原格构挡墙下部提供有效支撑和控制潜在滑动面变形上;监测结果表明,应急治理后边坡达到稳定性要求。      

Field investigation of force and displacement within a strata slope using a real-time remote monitoring system

Research on monitoring and forecasting technology for slope stability is important for ensuring railway operation. This paper presents field investigation of force and displacement within a strata slope using a real-time remote monitoring system. Based on the interactions of the landslide body, the landslide bed and the monitoring anchor of slope, the mechanical principle of relative movement between the landslide body and the landslide bed can be found. This paper puts forward stress data obtained from a monitoring anchor as the main criterion for landslide stability. The stress will change continually inside the slope mass before the occurrence of a landslide. When the sliding force is larger than the anti-sliding force, deformation and landslides will occur; thus, the change in stress occurs before the change in displacement. In this study, the internal stress, deep displacement and surface strain of a railway slope were measured by a real-time remote-monitoring system, and a vibration metre was installed on the surface of the railway slope to study the influence of the train vibration load on the stability of the slope. The monitoring results are synthetically analysed temporally and spatially, then a railway slope forecasting model is proposed. According to the railway slope field application, the forecasting model makes successful predictions.     

Stability analysis of the 2007 Chehalis lake landslide based on long-range terrestrial photogrammetry and airborne LiDAR data

On December 4th 2007, a 3-Mm³ landslide occurred along the northwestern shore of Chehalis Lake. The initiation zone is located at the intersection of the main valley slope and the northern sidewall of a prominent gully. The slope failure caused a displacement wave that ran up to 38 m on the opposite shore of the lake. The landslide is temporally associated with a rain-on-snow meteorological event which is thought to have triggered it. This paper describes the Chehalis Lake landslide and presents a comparison of discontinuity orientation datasets obtained using three techniques: field measurements, terrestrial photogrammetric 3D models and an airborne LiDAR digital elevation model to describe the orientation and characteristics of the five discontinuity sets present. The discontinuity orientation data are used to perform kinematic, surface wedge limit equilibrium and three-dimensional distinct element analyses. The kinematic and surface wedge analyses suggest that the location of the slope failure (intersection of the valley slope and a gully wall) has facilitated the development of the unstable rock mass which initiated as a planar sliding failure. Results from the three-dimensional distinct element analyses suggest that the presence, orientation and high persistence of a discontinuity set dipping obliquely to the slope were critical to the development of the landslide and led to a failure mechanism dominated by planar sliding. The three-dimensional distinct element modelling also suggests that the presence of a steeply dipping discontinuity set striking perpendicular to the slope and associated with a fault exerted a significant control on the volume and extent of the failed rock mass but not on the overall stability of the slope.     

江西省南康市横市镇双井路滑坡治理措施

对双井路滑坡勘查资料分析基础上,从双井路滑坡所处的地质环境条件、气象因素及遭受的人为因素特点,介绍了滑坡（地质灾害）体的地质结构,形成原因。认为该滑坡所在区地质构造条件复杂是滑坡形成的背景条件,乡镇居民建房大规模切坡是导致该滑坡发生的人为因素,长时间集中性暴雨是滑坡形成的主要诱发因素。并依据该滑坡的危险性大,提出采用削坡减载＋重力式挡墙与修建地表截、排水系统的治理方案。