公路路基震害特征及震后工作状态的安全评估
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摘要
为了深入研究公路路基震害特征及震后路基工作状态的安全评估,根据汶川地震灾区的大量路基震害调查、检测与抢通保通的成果,概括介绍了汶川地震路基的损毁情况;归纳总结了公路路基结构的典型震害表现形式及特征;探讨了路基及其支挡结构的震害影响因素。研究结果表明:路基结构震害主要表现为路基沉陷、扭曲变形、开裂、滑移、路面隆起以及地震对路基结构产生的次生破坏;路基的震害影响因素主要是地质条件、地震烈度、路基结构形式等。据此给出了震后路基结构安全诊断项目及检测结果的评估,同时根据评估结果,针对抢险救灾阶段和恢复重建阶段,对不同安全等级的路基结构提出不同处治建议,以期为震后路基结构病害预防、工作状态诊断和病害处理提供技术参考。
For investigate the earthquake damage features and safety assessment of post-earthquake working status of highway subgrade,the damage of subgrade in Wenchuan earthquake was briefly introduced based on the results of Wenchuan earthquake investigation,inspection,rush repairing and recovery.The typical earthquake damage forms and features of subgrade as well as the influencing factors of earthquake damage were discussed.The results show that(1) the forms of subgrade damage mainly contain subsidence,distortion,cracking,slipping,apophysis and secondary damage;(2) the main influencing factors of subgrade damage are geological condition,earthquake intensity,subgrade structure,etc.The post-earthquake subgrade structure safety diagnosis items and evaluation of testing results were determined.Different treatment advices were given on different security levels of subgrade structure for rush repairing and recovery stages based on the assessment result to provide technical references for the post-earthquake disease prevention,diagnosis and disease treatment.
For investigate the earthquake damage features and safety assessment of post-earthquake working status of highway subgrade,the damage of subgrade in Wenchuan earthquake was briefly introduced based on the results of Wenchuan earthquake investigation,inspection,rush repairing and recovery.The typical earthquake damage forms and features of subgrade as well as the influencing factors of earthquake damage were discussed.The results show that(1) the forms of subgrade damage mainly contain subsidence,distortion,cracking,slipping,apophysis and secondary damage;(2) the main influencing factors of subgrade damage are geological condition,earthquake intensity,subgrade structure,etc.The post-earthquake subgrade structure safety diagnosis items and evaluation of testing results were determined.Different treatment advices were given on different security levels of subgrade structure for rush repairing and recovery stages based on the assessment result to provide technical references for the post-earthquake disease prevention,diagnosis and disease treatment.
引文
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[2]FANG Y S,YANG Y C,CHEN T J.Retaining WallsDamaged in the Chi-Chi Earthquake[J].CanadianGeotechnical Journal,2003,40:1142-1153.
[3]SANDRI D.A Performance Summary of Reinforced SoilStructures in the Greater Los Angeles Area after theNorthridge Earthquake[J].Geotextiles andGeomembranes,1997,15:235-253.
[4]姚令侃,冯俊德,杨明.汶川地震路基震害分析及对抗震规范改进的启示[J].西南交通大学学报,2009,44(3):301-311.YAO Lingkan,FENG Junde,YANG Ming.DamageAnalysis of Subgrade Engineering in Wenchuan Earthquakeand Recommendations for Improving Seismic Design Code[J].Journal of Southwest Jiaotong University,2009,44(3):301-311.
[5]吉随旺,唐永建,胡德贵,等.四川省汶川地震灾区干线公路典型震害特征分析[J].岩石力学与工程学报,2009,28(6):1250-1260.JI Suiwang,TANG Yongjian,HU Degui,et al.Analysisof Typical Seismic Damages of Highways in WenchuanEarthquake-induced Hazard Areas in Sichuan Province[J].Chinese Journal of Rock Mechanics andEngineering,2009,28(6):1250-1260.
[6]汪闻韶,金崇磐,王克成.土石坝的抗震计算和模型实验及原型观测[J].水利学报,1987,12:1-16.WANG Wenzhao,JIN Chongqing,WANG Kecheng.Aseismatic Calculation,Model and Prototype Experimentsand Field Monitoring of Earth-rock Dams[J].Journal ofHydraulic Engineering,1987,12:1-16.
[7]TATSUOKA F,TATEYAMA M,MOHRI Y,et al.Remedial Treatment of Soil Structures Using Geosynthetic-reinforcing Technology[J.]Geotextiles and Geomem-branes,2007,25(4/5):204-220.
[8]周朝晖.2008年四川汶川8.0级地震强震动台网观测记录[J].四川地震,2008(4):25-29.ZHOU Chaohui.The Strong Ground Motion Recordings ofthe Ms8.0 Wenchuan Earthquake in Sichuan Province[J].Earthquake Research in Sichuan,2008(4):25-29.
[9]李建国,楮宇光,杜玉柱.汶川地震铁路路基工程震害调查与分析[J].铁道工程学报,2008(增2):91-95.LI Jianguo,CHU Yuguang,DU Yuzhu.Investigation andAnalysis of Damage of Railway Subgrade Engineering inWenchuan Earthquake[J].Journal of RailwayEngineering Society,2008(S2):91-95.
[10]朱颖,魏永幸.汶川大地震道路工程震害特征及工程抗震设计思考[J].岩石力学与工程学报,2010,29(增1):3378-3386.ZHU Ying,WEI Yongxing.Characteristics of RailwayDamage due to Wenchuan Earthquake and CountermeasureConsiderations of Engineering Seismic Design[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(s1):3378-3386.
[11]谢和平,邓建辉,台佳佳,等.汶川大地震灾害与灾区重建的岩土工程问题[J].岩石力学与工程学报,2008,27(9):1781-1791.XIE Heping,DENG Jianhui,TAI Jiajia,et al.Wenchuan Large Earthquake and Post-earthquakeReconstruction-related Geotechnical Problems[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(9):1781-1791.
[12]周海涛.公路工程抗震减灾技术回顾与展望[J].公路交通科技,2010,27(9):39-43.ZHOU Haitao.Review and Prospect of EarthquakeResistance and Disaster Mitigation Technology of HighwayEngineering[J].Journal of Highway and TransportationResearch and Development,2010,27(9):39-43.
[13]曾超,王可君,李曙平,等.“5.12”汶川大地震公路路基震害浅析[J].世界地震工程,2009,25(3):162-166.ZENG Chao,WANG Kejun,LI Shuping,et al.PrimaryAnalysis of the Seismic Damage to Roadbeds DuringWenchuan Earthquake[J].World Earthquake Engin-eering,2009,25(3):162-166.
[14]黄润秋,李为乐.“5.12”汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报,2008,27(12):2585-2592.HUANG Runqiu,LI Weile.Research on Developmentand Distribution Rules of Geohazards Induced byWenchuan Earthquake on 12th May[J].Chinese Journalof Rock Mechanics and Engineering,2008,27(12):2585-2592.
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