汶川地震对线路工程抗震技术提出的新课题.docVIP

地震特刊 5.12汶川地震对线路工程抗震技术提出的新课题 姚令侃1 陈强2 （1.西南交通大学土木工程学院，四川 成都 610031; 2. 四川省交通厅公路规划勘察设计研究院 四川 成都 61001）） 摘要：5.12汶川地震对地震学、地震工程学都提出了新的挑战，对线路工程而言，核心科学问题是发生在山区的地震波传输的三维特性与地形巨大高差所导致的斜坡重力效应的耦合，对线路工程的破坏作用和工程在地震作用下的破坏机理。本文首先通过对汶川地震灾害现象的分析，归纳出线路工程抗震技术面临的3个新的课题，即基于艰险山区地震波传输特性的公路铁路选线设计技术、地震诱发线路工程山地灾害机理及防治技术、以系统工程理论为指导的生命线工程抗震对策；同时对这3个课题的研究现状和研究思路提出了建议；然后从填补现行规范空白以及对现有规范技术框架进行延展和更新两个层面,论述了汶川地震对线路工程抗震设计规范发展的推动作用。 关键词：路基工程；汶川地震；选线设计；地震诱发山地灾害;抗震规范 中图分类号：TU 435 文献标识码：A New Research Subjects on Earthquake Resistant Techniques of Line Engineering Extracted from 5.12 Wenchuan Earthquake YAO Lingkan1,CHEN Qiang2 (1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031 China;2.Highway Planning Survey and Research Institute, Sichuan Provincial Communication Department, Chengdu 610041, China) Abstract: 5.12 Wenchuan earthquake offered new challenges to seismology and earthquake engineering. For line engineering, the primary problems are damage mechanisms caused by the coupling interaction of three-dimensional characteristics of seismic wave propagation and gravity effect of slope in mountainous terrain. First, based on the analysis of the subgrade earthquake damage caused by Wenchuan earthquake, three new subjects on earthquake resistant techniques of line engineering are summarized, including highway and railway route selection techniques based on the propagational characteristic of seismic wave in mountainous area, the mechanisms and prevention techniques of mountain hazards caused by earthquake, and earthquake resistant countermeasures of lifeline engineering under the guidance of system engineering theory. Then, the research status and technical schemes on three new subjects are proposed. Last, from two phases, including the supplement of the blank of the current earthquake resistant design standards and the renew and development of the earthquake resistant technological framework, the promotion effect of Wenchuan earthquake on the develop