活动地裂缝对高速铁路简支梁桥危害机理及工程措施研究

项目名称： 活动地裂缝对高速铁路简支梁桥危害机理及工程措施研究

项目编号： No.41302252

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 刘聪

作者单位： 长安大学

项目金额： 25万元

中文摘要： 我国是世界上地裂缝灾害最为严重的国家，地裂缝分布十分广泛，其发生频率和灾害程度逐年加剧，对我国当前正在大规模建设的高速铁路构成了严重威胁。本项目以山西断陷盆地地裂缝灾害为研究背景，选择已开工建设的大西客运专线穿越地裂缝段为研究对象，采用物理模型试验、数值模拟和理论分析计算相结合的方法，重点开展活动地裂缝对高速铁路桥梁工程危害机理研究。力求通过本项目的研究，揭示地裂缝活动作用下不同跨度的简支梁桥及轨道变形破坏的机理，并提出简支梁桥的合理跨度，为大西客运专线跨越地裂缝带的桥梁工程及地裂缝灾害防治提供理论依据和技术指导。项目研究成果不仅对其它穿越地裂缝发育区的高速铁路灾害防治具有重要参考价值，而且将丰富我国地裂缝灾害研究，尤其是高速铁路地裂缝灾害防治研究，具有重要的理论意义和工程实际意义。

中文关键词： 地裂缝；高速铁路；影响机制；防治对策；

英文摘要： China suffers the most serious ground fissure hazards in the world: the ground fissures are widely distributed, and its frequence of occurrence as well as extent of disasters are increased year by year. All of these threaten high-speed railways which are under large scale construction in our country seriously. Based on the research of ground fissures in Shanxi fault basin, taking ground fissure area which is crossed by the now commenced Da-Xi passenger dedicated line as research object, using physical model test ,numerical simulation and theoretical analysis combined with calculation as research methods, this project mainly focuses on the research of high-speed railway bridge engineering damage mechanism caused by active ground fissure, reveals deformation and failure mechanism of simple supported bridge and track with different spans under the action of ground fissure,and propose a reasonable span for simple supported bridge, which provides bridge engineering as well as ground fissure hazards prevention in ground fissure area crossed by Da-Xi passenger dedicated line with theoretical basis and technical guidance. The achievement of this project not only has important reference value for the prevention of high speed railway ground fissure hazard in other area, but also enrich our research on ground fissure hazar

英文关键词： ground fissure；high-speed railway；simple supported bridge；reasonable span；