山区公路高桥墩路桥过渡段行车安全及对策研究

项目名称： 山区公路高桥墩路桥过渡段行车安全及对策研究

项目编号： No.51278361

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： 潘晓东

作者单位： 同济大学

项目金额： 78万元

中文摘要： 山区公路高桥墩路桥过渡段由于其地形、气候、环境等的特殊性，导致行车安全受侧风、离心力、桥头跳车、路堤路面与桥面附着系数不一致和驾驶员生理心理反应等多因素不利影响，易成为交通事故的多发路段。本研究以某山区高速公路为依托工程，通过桥头处风速场的数值模拟方法研究和现场行车实验分析，探讨侧风的影响机理；通过三轴加速度仪间接测定路堤路面和桥面在不同湿滑状态下的附着系数，研究其变化规律；利用行车实验，研究路桥过渡段视点位置变化及桥头跳车时驾驶员的生理、心理反应，分析人体信息对行车安全的影响。重点解决路桥过渡段风速场的变化规律及其对行车安全的影响、雨雪和霜冻天气造成路面桥面湿滑导致的行车安全隐患；多因素共同作用下的路桥过渡段交通事故致因等关键问题，提出人、车、路、环境在安全隐患凸显的桥头处的改善措施，借助依托工程得以实施，对其适用性和效果进行评价，对减少路桥过渡段交通事故的发生有着重大的现实意义。

中文关键词： 桥隧连接段；侧风；路面摩擦系数；横断面形式；驾驶行为

英文摘要： Due to the particularity of mountainous roads in terrain, climate and environment, etc, it's High-pier bridge connection segment under this consideration could lead traffic safety greatly being influenced by the side effects of crosswind，centrifugal force，bridge head bump，different adhesion modulus values of road and bridge pavements and drivers' physiological and psychological reactions. All the above factors would turn connection segments into traffic accident block-points. Our study is based upon a mountain highway project in Hunan. The study explores the impact mechanism of crosswind on the traffic safety through numerical Simulation of wind speed field at the bridgehead and site experiments and analysis ;finds the variation of adhesion modulus values via triaxial accelerometer in different wet and slippery states ; and research driver's physiological and psychological reactions while drivers' view position changes or bridge bump aiming at analyzing the affect of human information on traffic safety by means of driving experiences. Our study mainly discusses the cause mechanism of accidents under multiple factors on bridge connection segment, then proposes road safety improvement measures from four aspects of people, vehicles, road and environment. All measures will be implemented in our project and be evalua

英文关键词： Bridge-tunnel linkage section；Crosswind；Pavement roughness；Cross section forms；Driving behavior