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地质力学学报:2015,21(2):298-308
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天水锻压机床厂滑坡变形破坏机制及形成演化
(1.中国地质大学地球科学与资源学院, 北京 100083;2.中国地质科学院地质力学研究所, 北京 100081)
DEFORMATION MECHANISM AND EVOLUTIONARY PROCESS OF THE TIANSHUI FORGING MACHINE PLANT LANDSLIDE IN GANSU
(1.School of Geosciences and Resources, China University of Geosciences, Beijing 100083, China;2.Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China)
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投稿时间:2014-11-03    
中文摘要: 天水锻压机床厂滑坡(1.4×106 m3)发生于1990年8月11日,滑坡体主要由次生黄土组成,滑床为第四系黄土和新近系泥岩,滑坡沿黄土-泥岩接触面发生,属黄土接触面滑坡。通过野外调查和工程钻探对锻压机床厂滑坡变形破坏机制及形成演化进行研究,结果表明,该滑坡变形破坏方式表现为滑移-拉裂式,受区内二元斜坡结构控制,是在工程切坡和降雨、灌溉等诱发因素作用下形成;其形成演化经历了高陡边坡形成期→滑坡孕育期→滑动面贯通临界期→滑坡启动下滑堆积期→滑坡复活变形期等过程。该滑坡目前处于欠稳定状态,遇地震或强降雨等作用,极有可能再次复活下滑。研究成果可为该类滑坡的防治预警提供理论依据。
Abstract:The Tianshui Forging Machine Plant Landslide in Gansu Province happened on August 11, 1990 with a volume of 1.4×106 m3. It is a loess interface landslide occurring along the loess/mudstone interface. The landslide body is mainly composed of secondary loess, and the slip bed is mainly composed of Quaternary loess and Neogene mudstone. The landslide is controlled by the double-layered structure of the slope in area, being induced by some factors such as engineering excavation, rainfall and irrigation. The research on the deformation mechanism and evolutionary process of the landslide based on geological survey and engineering drilling shows that the formation process can be divided as follow: the formation period of high and steep side slopes; the landslide incubation period; sliding surface through critical period; landslide falling and accumulating period; landslide revival and deformation period. Field investigation and engineering drilling indicate that the landslide is unstable at present. It can most likely revive and slide again if there is earthquake or heavy rainfall. The results can provide theoretical basis for the disaster warning of this kind of landslide.
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基金项目:中国地质调查局地质调查项目"西秦岭北缘断裂带天水段地震地质灾害调查评价"项目(12120114035601)
引用文本:
田尤,杨为民,刘廷,等,2015.天水锻压机床厂滑坡变形破坏机制及形成演化[J].地质力学学报,21(2):298-308.DOI:
TTIAN You,YANG Wei-min,LIU Ting,et al,2015.DEFORMATION MECHANISM AND EVOLUTIONARY PROCESS OF THE TIANSHUI FORGING MACHINE PLANT LANDSLIDE IN GANSU[J].Journal of Geomechanics,21(2):298-308.DOI:

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