文献类型：期刊文献

英文题名：A Recognition and Geological Model of a Deep-Seated Ancient Landslide at a Reservoir under Construction

作者：Qi, Shengwen[1,2];Zou, Yu[1,2];Wu, Faquan[3];Yan, Changgen[4];Fan, Jinghui[5];Zang, Mingdong[1,2];Zhang, Shishu[6];Wang, Ruyi[7]

机构：[1]Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China;[2]Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China;[3]Shaoxing Univ, Coll Civil Engn, Shaoxing 312000, Peoples R China;[4]Changan Univ, Highway Sch, Xian 710064, Peoples R China;[5]China Aerogeophys Survey & Remote Sensing Ctr Lan, Beijing 100083, Peoples R China;[6]Chengdu Engn Co Ltd, China Power, Chengdu 610072, Peoples R China;[7]China Zhengyuan Geomat Co Ltd, Jinan 250101, Peoples R China

年份：2017

卷号：9

期号：4

外文期刊名：REMOTE SENSING

收录：SCI-EXPANDED(收录号：WOS:000402571700082)、、EI(收录号：20230113346759)、Scopus(收录号：2-s2.0-85042550778)、WOS

基金：The authors give thanks to three anonymous reviewers for their detail and constructive suggestions, which greatly improved the quality of the manuscript. The authors also give thanks to Zhang Nianxue and Qu Yongxing from the Institute of Geology and Geophysics, Chinese Academy of Sciences, and Li Wenggang from Chengdu Engineering Co Ltd., China Power, for their kind help during fieldwork, as well as engineers Chen Qiujin, Deng Shubin, and Xu Enhui from ESRI China Information Technology Co. Ltd., and Paolo Pasquali from the Switzerland SARMAP Company for ENVI and SARScape software test. This research is supported by funds from the National Natural Science Foundation of China under Grants Nos. 41322020 and 41672307 and the Chinese Academy of Science under Grants of KFJ-EW-STS-094.

语种：英文

外文关键词：deep-seated landslide; ancient landslide; the last glaciation; high-density electric resistivity method; InSAR

外文摘要：Forty-six ancient Tibetan star-shaped towers and a village are located on a giant slope, which would be partially flooded by a nearby reservoir currently under construction. Ground survey, boreholes, and geophysical investigations have been carried out, with results indicating that the slope consists of loose deposit with a mean thickness of approximately 80 m in addition to an overlying bedrock of micaceous schist and phyllite. Ground survey and Interferometric Synthetic Aperture Radar (InSAR) indicated that the slope is experiencing some local deformations, with the appearance of cracks and occurrence of two small landslides. Through using borehole logs with the knowledge of the regional geological background, it can be inferred that the loose deposit is a result of an ancient deep-seated translational landslide. This landslide was initiated along the weak layer of the bedding plane during the last glaciation in the late Pleistocene (Q(3)) period, which was due to deep incision of the Dadu River at that time. Although it has not shown a major reaction since the ancient Tibetan star-shaped towers have been built (between 200 and 1600 AD), and preliminary studies based on geological and geomorphological analyses incorporated with InSAR technology indicated that the landslide is deformable. Furthermore, these studies highlighted that the rate of deformation is gradually reducing from the head to the toe area of the landslide, with the deformation also exhibiting relationships with seasonal rainstorms. The state of the toe area is very important for stabilizing a landslide and minimizing damage. It can be expected that the coming impoundment of the reservoir will increase pore pressure of the rupture zone at the toe area, which will then reduce resistance and accelerate the deformation. Future measures for protection of the slope should be focused on toe erosion and some bank protection measures (i.e., rock armor) should be adopted in this area. Meanwhile, some long-term monitoring measures should be installed to gain a deep understanding on the stability of this important slope.