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Airblast evolution initiated by Wangjiayan landslides in the M_(s)8.0 Wenchuan earthquake and its destructive capacity analysis
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作者 Yu-feng Wang Qian-gong Cheng Qi Zhu 《China Geology》 CAS CSCD 2024年第2期237-247,共11页
Airblasts,as one common phenomenon accompanied by rapid movements of landslides or rock/snow avalanches,commonly result in catastrophic damages and are attracting more and more scientific attention.To quantitatively a... Airblasts,as one common phenomenon accompanied by rapid movements of landslides or rock/snow avalanches,commonly result in catastrophic damages and are attracting more and more scientific attention.To quantitatively analyze the intensity of airblast initiated by landslides,the Wangjiayan landslide,occurred in the Wenchuan earthquake,is selected here with the landslide propagation and airblast evolution being studied using FLUENT by introducing the Voellmy rheological law.The results reveal that:(1)For the Wangjiayan landslide,its whole travelling duration is only 12 s with its maximum velocity reaching 36 m/s at t=10 s;(2)corresponding to the landslide propagation,the maximum velocity,28 m/s,of the airblast initiated by the landslide also appears at t=10 s with its maximum pressure reaching594.8 Pa,which is equivalent to violent storm;(3)under the attack of airblast,the load suffered by buildings in the airblast zone increases to 1300 Pa at t=9.4 s and sharply decreased to-7000 Pa as the rapid decrease of the velocity of the sliding mass at t=10 s,which is seriously unfavorable for buildings and might be the key reason for the destructive collapse of buildings in the airblast zone of the Wangjiayan landslide. 展开更多
关键词 LANdSLIdE Voellmy rheological law 3d FLUENT simulation Airblast Intensity Building destructive collapse Wenchuan earthquake geological hazards survey engineering
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Runout prediction of potential landslides based on the multi-source data collaboration analysis on historical cases
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作者 Jun Sun Yu Zhuang Ai-guo Xing 《China Geology》 CAS CSCD 2024年第2期264-276,共13页
Long runout landslides involve a massive amount of energy and can be extremely hazardous owing to their long movement distance,high mobility and strong destructive power.Numerical methods have been widely used to pred... Long runout landslides involve a massive amount of energy and can be extremely hazardous owing to their long movement distance,high mobility and strong destructive power.Numerical methods have been widely used to predict the landslide runout but a fundamental problem remained is how to determine the reliable numerical parameters.This study proposes a framework to predict the runout of potential landslides through multi-source data collaboration and numerical analysis of historical landslide events.Specifically,for the historical landslide cases,the landslide-induced seismic signal,geophysical surveys,and possible in-situ drone/phone videos(multi-source data collaboration)can validate the numerical results in terms of landslide dynamics and deposit features and help calibrate the numerical(rheological)parameters.Subsequently,the calibrated numerical parameters can be used to numerically predict the runout of potential landslides in the region with a similar geological setting to the recorded events.Application of the runout prediction approach to the 2020 Jiashanying landslide in Guizhou,China gives reasonable results in comparison to the field observations.The numerical parameters are determined from the multi-source data collaboration analysis of a historical case in the region(2019 Shuicheng landslide).The proposed framework for landslide runout prediction can be of great utility for landslide risk assessment and disaster reduction in mountainous regions worldwide. 展开更多
关键词 Landslide runout prediction drone survey Multi-source data collaboration dAN3d numerical modeling Jianshanying landslide Guizhou Province geological hazards survey engineering
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A three-dimensional matching localization algorithm based on helix triangular pyramid array
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作者 ZHAO Jiu-bin LIU Yuan-xue +1 位作者 LIU Chang-jia LING Yue 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第3期816-833,共18页
On the eve of the occurrence of geological hazards,part of the rock and soil body begins to burst,rub,and fracture,generating infrasound signals propagating outward.3D advanced positioning of the landslide has remaine... On the eve of the occurrence of geological hazards,part of the rock and soil body begins to burst,rub,and fracture,generating infrasound signals propagating outward.3D advanced positioning of the landslide has remained unsolved,which is important for disaster prevention.Through the Fourier transform and Hankel transform of the wave equation in cylindrical coordinates,this work established a three-dimensional axisymmetric sound field model based on normal waves,and designed a 4-element helix triangular pyramid array with vertical and horizontal sampling capabilities.Based on this,the three-dimensional matching localization algorithm of infrasound for geological hazards is proposed.Applying the algorithm to the infrasound signal localization of rock and soil layers,it was found that the helix triangular pyramid array can achieve accurate estimation of depth and distance with a smaller number of array elements than the traditional array,and may overcome the azimuth symmetry ambiguity.This study shows the application prospects of this method for predicting geohazards position several hours in advance. 展开更多
关键词 geologic hazards INFRASOUNd helix triangular pyramid array 3d matchinglocalization algorithm
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基于三维GIS的丹江口水库地质灾害监测预警系统设计与实现 被引量:18
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作者 陈蓓青 田雪冬 +2 位作者 曹浩 贾进科 张煜 《长江科学院院报》 CSCD 北大核心 2016年第7期51-54,67,共5页
论述了基于三维网络地理信息系统(GIS)的地质灾害监测预警系统的总体框架结构及特点,并对采用的信息采集组网与通信、时态GIS技术和基于多模型的地质灾害监测预测预警技术等关键技术进行了介绍。系统采用部署灵活、扩展性强的多层体系结... 论述了基于三维网络地理信息系统(GIS)的地质灾害监测预警系统的总体框架结构及特点,并对采用的信息采集组网与通信、时态GIS技术和基于多模型的地质灾害监测预测预警技术等关键技术进行了介绍。系统采用部署灵活、扩展性强的多层体系结构,运用地理信息技术、虚拟仿真技术和基于多用户并发的WEB异步服务技术,构建了融合三维地理信息功能与地质灾害预警预报业务功能的网络决策支持系统,实现了地质灾害信息采集、传输、管理、分析、决策、预警发布的一体化平台,系统已在丹江口库区投入试运行,可为我国地质灾害管理科学化,应急响应高效化提供参考和借鉴。 展开更多
关键词 地质灾害 监测预警 三维仿真 GIS 丹江口水库
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基于InfoEarth iTelluro的地质灾害群测群防三维GIS系统设计与实现 被引量:3
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作者 任涛 吴悦 郝文杰 《长江科学院院报》 CSCD 北大核心 2013年第7期111-116,共6页
介绍了"地质灾害群测群防监测技术方法与研究"项目中地质灾害群测群防三维GIS系统的设计与实现过程。分析了地质灾害群测群防野外监测工作的业务流程,提出了数据库设计思路。结合InfoEarth iTelluro平台及其组件特点,分析了... 介绍了"地质灾害群测群防监测技术方法与研究"项目中地质灾害群测群防三维GIS系统的设计与实现过程。分析了地质灾害群测群防野外监测工作的业务流程,提出了数据库设计思路。结合InfoEarth iTelluro平台及其组件特点,分析了系统核心功能模块的设计方法。通过对系统实现及应用效果的分析,为地质灾害群测群防信息管理提供了开发思路和实践帮助。 展开更多
关键词 地质灾害群测群防 三维GIS InfoEarth iTelluro 信息管理
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地质灾害勘察数据在三维GIS中的表达方法研究 被引量:4
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作者 张志庭 汪新庆 李伟忠 《工程地球物理学报》 2004年第6期525-529,共5页
多样的勘察手段从多个方面对地质灾害体进行了揭露和记录,提供了丰富的数据资料,基于这些数据建立合理的地质模型是在三维GIS中表现地质灾害体的重要基础。本文以面向对象分析方法对地质灾害勘察中获取的数据及成果进行抽象分类,对不同... 多样的勘察手段从多个方面对地质灾害体进行了揭露和记录,提供了丰富的数据资料,基于这些数据建立合理的地质模型是在三维GIS中表现地质灾害体的重要基础。本文以面向对象分析方法对地质灾害勘察中获取的数据及成果进行抽象分类,对不同的数据类型建立相应的地质模型进行表达,并结合实例进行了验证,取得了预期的效果。 展开更多
关键词 地质灾害勘察 面向对象 地质模型 三维GIS
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