列车振动荷载下海底盾构隧道交叉结构动力特性及车致损伤机理研究

项目名称： 列车振动荷载下海底盾构隧道交叉结构动力特性及车致损伤机理研究

项目编号： No.51278425

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 晏启祥

作者单位： 西南交通大学

项目金额： 83万元

中文摘要： 随着我国铁路水下隧道建设技术的快速发展，大型海底铁路隧道必将成为今后海湾海峡跨越水域分割的重要手段，琼州海峡通道、渤海海峡通道等世界级铁路海底隧道的建设已然临近。本项研究结合近海海洋地质体、海洋海蚀和高速、重载列车的特点，针对大型海底铁路盾构隧道联络横通道或竖井等消防运营附属设施与主体隧道形成的大量空间交叉结构，研究不同行车速度和列车载荷下车辆振动荷载频谱特性、振动荷载下空间交叉结构动力分析模型及其振动效应、空间交叉结构车致损伤机理、损伤演化规律以及损伤的工程控制技术措施等，以期揭示不同条件下列车振动荷载的频谱特性、探明空间交叉结构的车辆振动响应规律，建立交叉结构车辆振动动力损伤演化模型及其评估方法，揭示交叉结构动力损伤机理，构建交叉结构列车振动影响的分区标准，提出交叉结构消减和抵御列车振动损伤的工程技术措施，为今后大量海底铁路隧道空间交叉结构的耐久性设计和长期运营安全提供理论和技术支撑。

中文关键词： 交叉盾构隧道；振动荷载；动力响应；累积损伤；模型试验

英文摘要： With the rapid development of construction technology on underwater railway tunnels in China, large subsea railway tunnel will inevitably become an important means to pass through the channels or bays, and the construction of world-class large undersea railway tunnels will come up in near future,such as Qiongzhou channel tunnel, Bohai channel tunnel. Combined with the characteristics of offshore marine geological body，marine abrasion and high-speed，heavy freight train, aimed at a large number of space cross structures in large subsea railway shield tunnels formed by the intersection of the fire fighting and operating ancillary facilities such as connected cross aisle and shaft with the main tunnel,the research includes: spectrum characteristics of train vibration load caused by diferent running speed and weight, dynamic analysis models and vibration effect of space cross structure under vibration load, damage mechanism of space cross structure, damage evolution law as well as engineering control technology of train vibration damage. The results are expected to reveal spectrum characteristics of train vibration load under different condition, prove up train vibration response law of space cross structure, build train vibration dynamic damage evolution model and evaluation method of space cross structure,announce

英文关键词： cross shield tunnel；vibration load；dynamic response；cumulative damage；model test