公路路基震害特征及震后工作状态的安全评估  

Earthquake Damage Characteristics and Safety Assessment of Post-earthquake Working Status of Road Subgrade

作　　者：李志强[1] 李金贝[2] 张鸿儒[2] 

机构地区：[1]交通运输部科学研究院,北京100029 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《公路交通科技》2011年第8期57-62,共6页Journal of Highway and Transportation Research and Development

基　　金：交通运输部西部交通建设科技项目(200831822196;2009318740099)

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.

关 键 词：道路工程 安全评估 震害检测 路基 

分 类 号：TU435[建筑科学—岩土工程]