共查询到20条相似文献，搜索用时 46 毫秒
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北京戒台寺滑坡是非典型的多条①、多级、多块及多层滑带的大型复杂破碎岩石滑坡群.结合该滑坡所在地域的地形、地貌、工程地质和水文地质概况,论述了该滑坡的产生原因、发生发展机理和变形机制,提出了戒台寺滑坡的治理范围及工程措施,得出相应的结论.为类似滑坡的治理工程提供实例. 相似文献
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邹鲁德 《地质灾害与环境保护》2011,22(1):80-83,97
"钻孔注浆+预应力锚索"工艺被应用在了迪庆变电站滑坡山体的工程治理中.本文在分析滑坡体地层结构、岩性和地形特征的基础上,介绍工程设计、工艺和施工方案.工程效果表明,在破碎岩土区,"钻孔注浆+预应力锚索"工艺治理滑坡效果显著. 相似文献
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广西防城港那勤滑坡稳定性评价及防治对策 总被引：2，自引：0，他引：2
那勤滑坡位于广西南部低山丘陵地貌区，由破碎花岗岩及其风化产物构成。对该滑坡壁、滑坡床、滑坡体的结构特征及滑坡的拉张裂缝、滑坡洼地、醉林与马刀树等变形特征进行研究，结合滑坡形成的地质构造、地层岩性、地形地虢、气象水文等因素分析认为，该滑坡的形成过程专裂隙构造破坏花岗岩体的稳定性，形成易于脱离基岩的滚石；斜坡地形使其在重力作用下堆积于沟谷中，形成大小滚石及砂土杂乱堆积的滚石堆；雨水及地下水带走了堆积体内的砂土和细小滚石，使其成为空洞发育、大滚石相互支撑的滚石堆。风化及暴雨的冲刷作用，使滚石失衡、崩塌。在滑坡区中后部、坡度较陡的南、北两侧，形成塌陷洼地，在重力作用下诱发整个滑坡体，沿斜坡下滑。滑坡体的展布面积约由1．03万m^2，总体积1．6万m^3。采用传递系数法对滑坡的稳定性进行了定量计算及稳定性评价。得出，在饱水状态下，滑坡稳定性差，地质灾害危险性大。论文提出了设置排水工程、支挡工程、坡面防护、在空洞处灌浆以及人工炸石等治理和防护措施。 相似文献
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北京戒台寺滑坡为一产生在地质构造发育、地层岩性差和地质环境恶劣条件下的大型破碎岩石滑坡群。滑坡规模巨大,成因复杂,总方量达920多万立方米。滑坡治理采用支挡、锚固、治水、注浆等综合治理技术。整治工程中,对滑坡进行了动态监测,通过深孔、裂缝、地表观测网等监测手段,确定滑坡的变形范围、滑动面位置、主滑方向、各滑块的滑动方向以及之间的滑动关系,同时揭示了春融以及治理工程中各工序对滑坡的影响,为动态设计、信息化施工及评价工程效果提供依据,在整治工程中发挥了关键性作用。同时,也为今后类似大型滑坡的监测提供参考。 相似文献
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三峡库区奉节县向家淌滑坡防治方案研究 总被引：1，自引：4，他引：1
许向宁 《中国地质灾害与防治学报》2004,15(2):89-93
奉节县向家淌滑坡是一个由碎裂岩体构成的岩质滑坡，由老滑坡体和其上的次级滑坡体构成。三峡水库运行后，向家淌滑坡的稳定性降低，次级滑坡将处于欠稳定状态，其前部可能会发生较大规模的滑动。根据滑坡特征、主导诱发因素和稳定性，针对滑坡失稳特征，通过防治方案初选，初步拟定了搬迁避让方案和综合工程治理方案，并从技术经济方面对比分析论证，确定了由抗滑桩工程、地表排水工程、块石护坡工程等组成综合治理方案，布置于变形破坏强烈的坎级滑坡地段，以保证滑坡体稳定，根除危害。 相似文献
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黄鹏 《地质灾害与环境保护》2016,(2):19-25
长输管道是国家重大生命线工程,滑坡灾害可能导致长输管道变形、拉裂、断裂等破坏,对滑坡成灾机理综合分析和稳定性评价是滑坡灾害治理的前提。本文以甘肃地区长输管道的某滑坡体为研究对象,调查分析地质构造、地质地层和地震气候情况,采用因果分析的鱼刺分析法从物、环境、人三个要素对滑坡成灾机理进行分析,并采用传递系数法对滑坡进行稳定性评价。基于滑坡灾害的综合分析成果,从防护、施工、环保和投资四个方面比较选定抗滑桩板墙灾害治理方案,治理实施效果良好。研究成果为类似线性工程的滑坡灾害分析和治理提供参考。 相似文献
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?以川东地区某新建高速公路的堆积体滑坡为工程实例,在对其进行现场踏勘和工程地质勘查的基础上,分析了该滑坡的工程地质条件、变形破坏演化机制。创新性的将传递系数法与Arc GIS的空间分析及数据处理功能相结合,对该滑坡的稳定性进行了评价及计算分区。首先,基于极限平衡理论得出滑坡的抗剪强度指标,再采用Arc GIS空间差值及栅格计算,结合力学公式,对该滑坡进行了空间模拟及稳定性评价,做出滑坡安全系数计算分区图。结果表明,在常规工况条件下,滑坡体局部处于欠稳定状态;在非常规工况条件下,滑坡体欠稳定区域大范围扩展,整体稳定性差。进而划分出该滑坡在不同工况的施工过程中需要重点防护治理部位,为该工程的进一步施工提供有意义的参考。? 相似文献
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大量事例表明,地下水是造成滑坡不稳定的重要原因,富含地下水浅层土质滑坡的滑体尤其滑带土的力学指标低下,滑体承受的地下水静水压力和动水压力较大,截排水工程成为该类滑坡治理的重要手段,传统的地下排水洞、水平排水孔和集水井抽水等滑坡体排水工程施工难度大、成本高,而"虹吸排水"法对滑坡治理排水,技术简单易行,经济绿色环保,针对富含地下水的浅层土质滑坡滑体,应优选采用地下水"虹吸排水"的治理技术,可望达到尽可能少投资,快速实现滑坡治理的目的。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.) 相似文献
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正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology, 相似文献
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正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.) 相似文献
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正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se- 相似文献
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正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with 相似文献