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Newmark displacement model for landslides induced by the 2013 Ms 7.0 Lushan earthquake, China

Frontiers of Earth Science 2016年第4期10卷 740-750页

作者： renmao yuan Qinghai DENG Dickson CUNNINGHAM Zhujun HAN Dongli ZHANG Bingliang ZHANG Key Laboratory of Active Tectonics and Volcano Institute of Geology China Earthquake Administration Beijing 100029 China College of Earth Science and Engineering Shandong University of Science and Technology Qingdao 266590 China Department of Environmental Earth Science Eastern Connecticut State University Connecticut 06226 USA

Predicting approximate earthquake-induced landslide displacements is helpful for assessing earthquake hazards and designing slopes to withstand future earth- quake shaking. In this work, the basic methodology outlined by Jibson （1993） is applied to derive the Newmark displacement of landslides based on strong ground-motion recordings during the 2013 Lushan Ms 7.0 earthquake. By analyzing the relationships between Arias intensity, New- mark displacement, and critical acceleration of the Lushan earthquake, formulas of the Jibson93 and its modified models are shown to be applicable to the Lushan earthquake dataset. Different empirical equations with new fitting coefficients for estimating Newmark displace- ment are then developed for comparative analysis. The results indicate that a modified model has a better goodness of fit and a smaller estimation error for the Jibson93 formula. It indicates that the modified model may be more reasonable for the dataset of the Lushan earthquake. The analysis of results also suggests that a global equation is not ideally suited to directly estimate the Newmark displacements of landslides induced by one specific earthquake. Rather it is empirically better to perform a new multivariate regression analysis to derive new coefficients for the global equation using the dataset of the specific earthquake. The results presented in this paper can be applied to a future co-seismic landslide hazard assessment to inform reconstruction efforts in the area affected by the 2013 Lushan Ms 7.0 earthquake, and for future disaster prevention and mitigation.

关键词： Newmark displacement of landslide Ariasintensity critical acceleration empirical relationship theLushan Ms 7.0 earthquake

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The 2014 Northern Thailand Mw 6.1 Earthquake and its Seismogenic Tectonics

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Acta Geologica Sinica(English Edition) 2022年第2期96卷 648-660页

作者： CHANG Zufeng DONG Pin-liang yuan renmao HOU Jianjun HE Zhongtai LI Jianlin CHANG Hao Yunnan Earthquake Agency Kunming 650224China Department of Geography and the Environment University of North TexasDentonTX 76203USA Key Laboratory of Active Tectonics and Volcanism Institute of GeologyChina Earthquake AdministrationBeijing 100029China School of Earth of Space Sciences Peking UniversityBeijing 100871China National Institute of Natural Hazards MEMCBeijing 100085China

On May 5, 2014, an earthquake with a magnitude of Mw 6.1(the largest earthquake in Thailand so far) occurred in Chiang Rai of the Golden Triangle area in northern Thailand. We had an opportunity to conduct field survey immediately after the earthquake. Serious damage to buildings and casualties of lives were observed, and the estimated Maximum Mercalli Intensity(MMI) of the earthquake is Ⅷ(evaluated according to the MMI scale of the Chinese Standard). No long continuous ground ruptures were produced during the earthquake, but in the epicenter(commonly within MMI Ⅷ extent), massive small linear ruptures(usually several tens of meters long) developed and displayed intriguing structural features, offsetting many roads several centimeters left laterally on NE trending cracks or offsetting right laterally on NW trending ones. The focal mechanism solution of earthquake shows that this is a pure strike-slip event, and two nodal planes in NW and NE directions had the same motion senses respectively as those of breakage associated with the earthquake. The long axis of the isoseismals and aftershock distributions are in NE direction,which is consistent with the strike of Luang Namtha fault. The 230-km-long Luang Namtha fault which starts from the border of China and Laos, runs through northern Laos, and terminates at Chiang Rai of Thailand is predominated by left-lateral strike-slip and active in late Quaternary, and two earthquakes over Ms 6.0 occurred along the fault in 1925 and 2007 respectively. This Mw 6.1 earthquake occurred at the southwestern end of the fault. All related features such as evident structural rupturing, elongated orientation of MMI and aftershock distribution,as well as the location of the epicenter,suggest that the Luang Namtha fault may be responsible for the 2014 Northern Thailand earthquake.

关键词： Mw 6.1 earthquake seismogenic tectonics Luang Namtha fault Indochina Block northern Thailand

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Seismotectonics of the 2008 and 2009 Qaidam Earthquakes and its Implication for Regional Tectonics

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Acta Geologica Sinica(English Edition) 2013年第2期87卷 618-628页

作者： CHEN Guihua XU Xiwei ZHU Ailan ZHANG Xiaoqing yuan renmao Yann KLINGER Jean-Mathieu NOCQUET Key Laboratory of Active Tectonics and Volcano Institute of Geology China Earthquake Administration Tectonics Observatory California Institute of Technology Earthquake Administration of Shanghai Municipality Earthquake Administration of Qinghai Province Institut de Physique du Globe CNRS Geoscience Azur

Three magnitude 〉6 earthquakes struck Qaidam, Qinghai province, China, in November 10th 2008, August 28th and 31st 2009 respectively. The Zongwulongshan fault has often been designated as the active seismogenic structure, although it is at odd with the data. Our continuous GPS station （CGPS）, the Xiao Qaidam station, located in the north of the Qaidam basin, is less than 30 km to the southwest of the 2008 earthquake. This CGPS station recorded the near field co-seismic deformation. Here we analyzed the co-seismic dislocation based on the GPS time series and the rupture processes from focal mechanism for the three earthquakes. The afiershocks were relocated to constrain the spatial characteristics of the 2008 and 2009 Qaidam earthquakes. Field geological and geomorphological investigation and interpretation of satellite images show that the Xitieshan fault and Zongwulongshan fault were activated as left lateral thrust during the late Quaternary. Evidence of folding can also be identified. Integrated analyses based on our data and the regional tectonic environment show that the Xitieshan fault is the fault responsible for the 2008 Qaidam earthquake, which is a low dip angle thrust with left lateral strike slip. The Zongwulongshan fault is the seismogenic fault of the 2009 earthquakes, which is a south dipping back thrust of the northern marginal thrust system of the Qaidam basin. Folding takes a significant part of the deformation in the northern marginal thrust system of the Qaidam basin, dominating the contemporary structure style of the northern margin of the Qaidam basin and Qilianshan tectonic system. In this region, this fault and fold system dominates the earthquake activities with frequent small magnitude earthquakes.

关键词： Qaidam earthquakes seismotectonics Xitieshan fault Zongwulongshan fault structure style

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Landslide Hazard Mapping Using GIS and Weight of Evidence Model in Qingshui River Watershed of 2008 Wenchuan Earthquake Struck Region

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Journal of Earth Science 2012年第1期23卷 97-120页

作者： Chong Xu Xiwei Xu Fuchu Dai Jianzhang Xiao Xibin Tan renmao yuan Key Laboratory of Active Tectenics and Volcano Institute of GeologyChina Earthquake AdministrationBeijing 100029China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

Tens of thousands of landslides were triggered by May 12, 2008 earthquake over a broad area. The main purpose of this article is to apply and verify earthquake-triggered landslide hazard analysis techniques by using weight of evidence modeling in Qingshui （清水） River watershed, Deyang （德阳） City, Sichuan （四川） Province, China. Two thousand three hundred and twenty-one landslides were interpreted in the study area from aerial photographs and multi-source remote sensing imageries post-earthquake, verified by field surveys. The landslide inventory in the study area was established. A spatial database, including landslides and associated controlling parameters that may have influence on the occurrence of landslides, was constructed from topographic maps, geological maps, and enhanced thematic mapper （ETM＋） remote sensing imageries. The factors that influence landslide occurrence,such as slope angle, aspect, curvature, elevation, flow accumulation, distance from drainages, and distance from roads were calculated from the topographic maps. Lithology, distance from seismogenic fault, distance from all faults, and distance from stratigraphic boundaries were derived from the geological maps. Normalized difference vegetation index （NDV1） was extracted from ETM＋ images. Seismic intensity zoning was collected from Wenchuan （汶川） Ms8.0 Earthquake Intensity Distribution Map published by the China Earthquake *** hazard indices were calculated using the weight of evidence model, and landslide hazard maps were calculated from using different controlling parameters cases. The hazard map was compared with known landslide locations and verified. The success accuracy percentage of using all 13 controlling parameters was 71.82%. The resulting landslide hazard map showed five classes of landslide hazard, i.e., very high, high, moderate, low, and very low. The validation results showed satisfactory agreement between the hazard map and the existing landslides distribution d

关键词： Wenchuan earthquake landslides weight of evidence Geographic Information Systems(GIS) landslide hazard mapping.

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透明土试验技术在滑坡降雨入渗中的研究与应用

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煤炭学报 2024年第7期49卷 3051-3062页

作者：王櫹橦陈盟唐莹影袁仁茂桂林理工大学地球科学学院广西桂林541004 桂林理工大学环境科学与工程学院广西桂林541004 中国地震局地质研究所北京100029

由于滑坡体内部结构的复杂性和不可视性,使得滑坡降雨入渗及其渗流过程无法直观观测,从而难于查明滑坡灾变演化全阶段中降雨入渗的具体作用过程,导致降雨诱发滑坡成灾机制的认识存在不确定性,因此,发展可以观测滑坡内部降雨入渗灾变过... 详细信息

由于滑坡体内部结构的复杂性和不可视性,使得滑坡降雨入渗及其渗流过程无法直观观测,从而难于查明滑坡灾变演化全阶段中降雨入渗的具体作用过程,导致降雨诱发滑坡成灾机制的认识存在不确定性,因此,发展可以观测滑坡内部降雨入渗灾变过程的新技术手段,对深入理解降雨诱发滑坡灾变机理具有重要意义。而透明土试验技术则使岩土体内部非介入式、连续、无损、可视化测量得以实现。从透明土材料特性、岩土工程性质、试验设备与图像处理解析技术等方面,总结透明土试验技术发展现状及其在不同领域的应用,重点概述该技术在边坡工程领域的应用和渗流过程可视化模拟中的实践,并讨论将其应用于滑坡渗流直观观测的可行性。在此基础上,针对透明土材料进行筛选和对制备方法进行优化,利用透明土替代传统土工模型材料建立适用于渗流过程观测的滑坡透明土物理模型,开展降雨条件下滑坡渗流物理模拟试验,获取降雨入渗诱发滑坡灾变全过程信息,确定滑坡体内部地下水渗流过程及其变化特征。该模型试验是透明土试验技术在滑坡渗流可视化观测领域一次有效的应用实践,拓展了滑坡灾害可视化模拟新途径,进一步确定地下水渗流对滑坡的复杂影响,有利于揭示降雨诱发滑坡演化规律、深入探索滑坡滑动机制,为降雨滑坡灾害防治和灾害规划提供科技支撑。

关键词：滑坡透明土试验技术降雨入渗可视化室内物理模拟

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Ground movement resulting from underground backfill mining in a nickel mine(Gansu Province,China)

Ground movement resulting from underground backfill mining i...

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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Fengshan Ma Haijun Zhao renmao yuan Jie Guo Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of Sciences Institute of Geology China Earthquake Administration

Underground backfill mining is a complex and high-cost mining technique,which was designed to control ground pressure and prevent rock mass movement and ground ***,the results were not always as good as expected in *** paper addresses a case of ground movement induced by backfill mining in a nickel mine,*** with geological investigation and ground monitoring,emphasis was put on the analysis of ground movement and interpretation of the deformation and *** results showed that a ground depression was formed at the hanging wall surface of the *** the end of 2013,the maximum subsidence reached 2,404 mm and accompanied by the rapid development of ground *** monitored ground movement corresponded well with the underground goaf and the distribution of the ground *** also found that the seriously deformed and damaged tunnels were exactly located in the plane projection of the subsidence *** addition,this study suggested that the high-level in situ stresses strengthened the mechanical strength of the surrounding rock mass and affected the overriding displacements in the wall rocks,thereby resulting in lower magnitude of vertical subsidence but greater expansion of horizontal deformation of the ground.

关键词： Ground movement Ground fissures Monitoring Backfill mining

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Application ot analytical hierarchy process and least-squares method for landslide susceptibility assessment along the Zhong-Wu natural gas pipeline,China

Application ot analytical hierarchy process and least-square...

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中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： Fengshan Ma Jie Wang renmao yuan Haijun Zhao Jie Guo Key Laboratory of Engineering Geomechanics Institute of Geology and GeophysicsChinese Academy of Sciences Graduate University of Chinese Academy of Sciences Key Laboratory of Active Tectonics and Volcano China Earthquake Administration Institute of Geology China Earthquake Administration

As one of the major problems of geo-engineering,landslides often influence the safety of linear engineering projects that cross mountainous ***,when selecting suitable routes for such projects,it is important to assess their susceptibility to *** this paper,we used a natural gas pipeline in the northeast of the Yunnan-Guizhou Plateau of China as a case study to analyze landslide *** on engineering geological analogy,the analytical hierarchy process,and the least-squares method, a regional landslide susceptibility assessment model was developed and was programmed using GIS ArcEngine components under the Visual *** *** landslide susceptibility along the Zhong-Wu natural gas pipeline from Zhongxian County to Wuhan was assessed based on this model and classified into five levels:very safe,safe,moderate,susceptible,and very susceptible. The high accuracy and prediction capability of the model were confirmed by comparing the model results with past landslide data and performing a prediction *** results indicated that the assessment model used in this study is reliable and can be used for landslide susceptibility assessment and route selection in other areas.

关键词： Landslide susceptibility assessment Pipeline AHP Least-squares method Engineering geological analogy

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论城市水土流失及其类型系统

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北京大学学报（自然科学版） 2001年第3期37卷 400-406页

作者：袁仁茂杨晓燕李树德北京大学城市与环境学系北京100871

城市水土流失包括土的流失和水的流失。在水资源日益短缺的今天 ,城市水资源的流失与土壤资源的流失一样 ,严重影响着城市的发展 ,但在水土流失研究中对水资源的流失相对重视不够 ,将水土流失中水土的交互作用作为一个系统工程进行研究... 详细信息

城市水土流失包括土的流失和水的流失。在水资源日益短缺的今天 ,城市水资源的流失与土壤资源的流失一样 ,严重影响着城市的发展 ,但在水土流失研究中对水资源的流失相对重视不够 ,将水土流失中水土的交互作用作为一个系统工程进行研究的工作则更少。城市水土流失不仅发生在地表 ,也发生在地表以下 ,共同构成城市水土流失的立体系统。同时。

关键词：城市水土流失水资源流失立体系统区域分异特征水土保持

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汶川地震擂鼓地区地表变形特征及其机制探讨

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地学前缘 2010年第5期17卷 75-83页

作者：谭锡斌袁仁茂徐锡伟陈桂华中国地震局地质研究所国家地震活断层研究中心北京100029

基于擂鼓附近地表破裂几何形态的特殊性以及对擂鼓地区地震地表破裂机制存在的不同认识,本文通过野外实际调查测量,并结合已有的文献资料对擂鼓地区地震地表变形特征进行了详细研究。分析结果认为:擂鼓附近几何形态的变化、同震位移量... 详细信息

基于擂鼓附近地表破裂几何形态的特殊性以及对擂鼓地区地震地表破裂机制存在的不同认识,本文通过野外实际调查测量,并结合已有的文献资料对擂鼓地区地震地表变形特征进行了详细研究。分析结果认为:擂鼓附近几何形态的变化、同震位移量的明显偏小,以及破裂带拐弯处的表层物质发散运动,表明该地区具有一般挤压阶区的特征。由于北川—映秀断裂北段是兼有逆冲运动和右旋走滑运动的断裂,所以相比于一般挤压阶区,擂鼓挤压阶区受到了更强烈的挤压隆升,并且仍受到逆冲引起的撕裂断层作用。擂鼓阶区内形成的滑坡、地表破裂以及鼓包都是局部块体受到强烈挤压作用的结果,而撕裂断层作用影响较小,且完全被挤压隆升变形所掩盖。根据文中的研究并结合已有的深部运动资料,笔者构建了擂鼓挤压阶区三维结构模型。对擂鼓地区的同震变形机制研究不仅有利于我们深入地理解汶川地震的地表破裂过程,也可为断裂阶区内的防震减灾提供理论依据。

关键词：汶川地震龙门山断裂带擂鼓挤压阶区撕裂断层

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藏东南地区地质灾害空间分布及影响因素分析

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地震研究 2019年第3期42卷 428-437,I0002页

作者：王盈金家梁袁仁茂中国地震局地质研究所活动构造与火山研究重点实验室北京100029 国家发展和改革委员会城市和小城镇改革发展中心北京100045

综合已有研究成果,在地质灾害解译的基础上,对藏东南地区的崩塌、滑坡、泥石流等地质灾害的分布特征、发育规律及其影响因素进行了分析。结果表明:研究区地质灾害点主要分布在雅鲁藏布江流域北段以及“三江”流域南北两侧,在空间展布上... 详细信息

综合已有研究成果,在地质灾害解译的基础上,对藏东南地区的崩塌、滑坡、泥石流等地质灾害的分布特征、发育规律及其影响因素进行了分析。结果表明:研究区地质灾害点主要分布在雅鲁藏布江流域北段以及“三江”流域南北两侧,在空间展布上具有不均匀性和分段群集性。在断裂活动、地层岩性、地形地貌以及人类工程活动等因素的影响下,地质灾害点集中发育在高山峡谷地貌、河流切割强烈的地区,以大理岩、板岩、白云岩、石灰岩、钙质砂岩、超基性岩类等为主的较坚硬岩类和以片岩、片麻岩类为主的较坚硬-较软弱岩性分布的地区,断裂带分布、构造活动强烈的地区以及人类工程活动强烈的地区,如主要公路沿线等。

关键词：藏东南地区地质灾害发育规律影响因素

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