基于震裂损伤程度的公路崩塌识别方法
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摘要
震后地震区公路沿线发育的地质灾害主要以崩塌灾害为主,不仅发生频率高,而且规模大、破坏强。根据实地调研震后公路沿线崩塌灾害的发育特征,选择对崩塌识别的主要影响因素进行了分析。选取主控结构面倾角、地形坡度、结构面特性、凹腔发育特征、岩性及组合特征、岩体结构和震裂损伤程度7个因素作为崩塌识别的基本指标,采用层次分析法半定量地研究了指标之间相互作用关系对崩塌识别的影响权重和指标重要性程度。提出了公路崩塌识别的崩塌判别指数CDI方法,建立了震后公路崩塌的识别体系。该识别体系运用到公路沿线崩塌隐患点的定量评价与现场的定性分析总体一致,表明该识别体系是对震后公路崩塌进行快速识别的有效方法。
The geological disaster development along the road in seismic region after earthquake is mainly collapse disaster,not only high frequencies of occurrence,but also large scale and strong destruction.According to the field investigation about the development characteristics of collapse along highway after earthquake,the major influencing factors of collapse identification are chosen and analyzed.Taking dip angel of control structural plane,gradient of geomorphology,characteristics of structural plane,development characteristics of recessed cavity,feature of lithology and assemblages,rockmass structure,degree of seismic damage as the basic indicators of collapse identification,the influence weight of collapse identification and index importance degree are semi-quantitatively analyzed by using AHP based on the interaction relationship among indexes.The collapse discrimination index CDI method for highway collapse identification is put forward,and the identification system of collapse after earthquake is built.The quantitative evaluation of the identification system applied to the hidden trouble area of collapse along highway and the field qualitative analysis is general consistent,which shows that this identification system is an effective and rapid method of collapse after earthquake.
The geological disaster development along the road in seismic region after earthquake is mainly collapse disaster,not only high frequencies of occurrence,but also large scale and strong destruction.According to the field investigation about the development characteristics of collapse along highway after earthquake,the major influencing factors of collapse identification are chosen and analyzed.Taking dip angel of control structural plane,gradient of geomorphology,characteristics of structural plane,development characteristics of recessed cavity,feature of lithology and assemblages,rockmass structure,degree of seismic damage as the basic indicators of collapse identification,the influence weight of collapse identification and index importance degree are semi-quantitatively analyzed by using AHP based on the interaction relationship among indexes.The collapse discrimination index CDI method for highway collapse identification is put forward,and the identification system of collapse after earthquake is built.The quantitative evaluation of the identification system applied to the hidden trouble area of collapse along highway and the field qualitative analysis is general consistent,which shows that this identification system is an effective and rapid method of collapse after earthquake.
引文
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[15]程强,吴事贵,苏玉杰.映秀-卧龙公路沿线汶川地震地质灾害研究[J].工程地质学报,2010,18(2):160-167.CHENG Qiang,WU Shigui,SU Yujie.Geological Hazardsdue to Wenchuan Earthquake along Yingxiu to WolongHighway[J].Journal of Engineering Geology,2010,18(2):160-167.
[2]宋光润,吉随旺,封崇德.汶川大地震工程震害调查分析与研究[M].北京:科学出版社.2009.SONG Guangrun,JI Suiwang,FENG Chongde.Analysisand Investigation on Seismic Damages of Projects Subjectedto Wenchuan Earthquake[M].Beijing:SciencePress,2009.
[3]HUDSON J A.Rock Mechanics Principle in EngineeringPractice[R].London:John Wiley&Sons Ltd.,1989.
[4]庄建琦,崔鹏.5.12汶川地震崩塌滑坡分布特征及影响因子评价:以都江堰至汶川公路沿线为例[J].地质科技情报,2009,28(2):16-22.ZHUANG Jianqi,CUI Peng.Distribution Characteristicsand Impact Factors Assessment of Collapses and LandslidesCaused by 5.12 Wenchuan Earthquake:TakingDujiangyan-Wenchuan Highway as a Sample[J].Geological Science and Technology Information,2009,28(2):16-22.
[5]陈晓利,周本刚,冉洪流.汶川地震中擂鼓镇地区的滑坡崩塌规律及预测[J].吉林大学学报:地球科学版,2010,40(6):1371-1379.CHEN Xiaoli,ZHOU Bengang,RAN Hongliu.Analysisand Prediction of the Spatial Distribution of LandslidesTriggered by Wenchuan Earthquakes in Leigu Region[J].Journal of Jilin University:Earth Science Edition,2010,40(6):1371-1379.
[6]杨仲元.道路边坡危岩落石运动路径研究[J].公路交通科技,2010,27(1):34-38.YANG Zhongyuan.Research on Perilous Rockfall MotionTrace of Road Slope[J].Journal of Highway andTransportation Research and Development,2010,27(1):34-38.
[7]OKURA Y,KITAHARA H,SAMMORI T.The Effects ofRockfall Volume on Runout Distance[J].EngineeringGeology,2000(58):109-124.
[8]PEILA D,OGGERI C.Ground Reinforced Embankmentsfor Rockfall Protection:Design and Evaluation of FullScale Tests[J].Landslides,2007,4(3):255-265.
[9]SASIHARAN N,MUHUNTHAN B,BADGER T C,et al.Numerical Analysis of the Performance of Wire Mesh andCable Net Rockfall Protection Systems[J].EngineeringGeology,2006,88(1/2):121-132.
[10]许强,李为乐.汶川地震诱发大型滑坡分布规律研究[J].工程地质学报,2010,18(6):818-826.XU Qiang,LI Weile.Distribution of Large-scaleLandslides Induced by Wenchuan Earthquake[J].Journal of Engineering Geology,2010,18(6):818-826.
[11]冯文凯,黄润秋,许强,等.震裂斜坡形成机理及变形破坏模式研究[J].水文地质工程地质,2009,36(6):42-48.FENG Wenkai,HUANG Runqiu,XU Qiang,et al.Studyon Formation Mechanism and Deformation Failure Modelsof Shatter Slopes[J].Hydrogeology and EngineeringGeology,2009,36(6):42-48.
[12]许年春,石维力,石东虹.地震作用下边坡动力系数有限元分析[J].地下空间与工程学报,2008,4(6):1006-1010.XU Nianchun,SHI Weili,SHI Donghong.Finite ElementAnalysis on Dynamic Coefficient for Slopes Subjected toEarthquake Load[J].Chinese Journal of UndergroundSpace and Engineering,2008,4(6):1006-1010.
[13]张立,付宏渊,付康林,等.汶川地震诱发边坡动力失稳影响因素分析[J].公路交通科技,2010,28(4):12-18.ZHANG Li,FU Hongyuan,FU Kanglin,et al.Analysison Influencing Factors of Slope Dynamic Stability Inducedby Wenchuan Earthquake[J].Journal of Highway andTransportation Research and Development,2010,28(4):12-18..
[14]王建,姚令侃,蒋良潍.边坡岩石块体动力响应及锚固抗震效应研究[J].公路交通科技,2010,28(3):6-11.WANG Jian,YAO Lingkan,JIANG Liangwei.Researchon Dynamic Response of Rock Blocks in Slope and Anti-seismic Effect of Anchor Reinforcement to Rock Mass[J].Journal of Highway and Transportation Research andDevelopment,2010,28(3):6-11.
[15]程强,吴事贵,苏玉杰.映秀-卧龙公路沿线汶川地震地质灾害研究[J].工程地质学报,2010,18(2):160-167.CHENG Qiang,WU Shigui,SU Yujie.Geological Hazardsdue to Wenchuan Earthquake along Yingxiu to WolongHighway[J].Journal of Engineering Geology,2010,18(2):160-167.
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