基于最大横向动态位移外延值的中央分隔带节地型分设式波形梁护栏研究  

Research on Land-saving W-beam Barrier of Central Separation Section Based on the Maximum Dynamic Widening Distance of Lateral Deflection

作　　者：邰永刚[1] TAI Yonggang(Beijing Jiaoke Transport Conultants Ltd., Beijing 100191,China)

机构地区：[1]北京交科公路勘察设计研究院有限公司,北京100191

出　　处：《公路工程》2021年第5期124-129,共6页Highway Engineering

基　　金：贵州省交通运输科技项目(2020-123-033)。

摘　　要：半刚性分设型中央分隔带护栏的设置,不但应考虑护栏自身的防护性能,还应考虑其是否会给对向车道的安全行车造成影响,因此现行规范中中央分隔带SBm级分设型波形梁护栏设置的最小中央分隔带宽度为1795 mm,当公路中央分隔带宽度不足时,无法按照现行规范要求设置SBm级分设型波形梁护栏。以最大横向动态位移外延值为控制指标,提出了4种节地型分设式波形梁护栏的改进方案,并通过计算机仿真分析方法研究了各改进方案的防护性能,通过防护性能、施工难度、造价对比优选了一种方案,该优选方案可有效控制护栏的最大横向动态位移外延值;通过实车碰撞试验方法验证了该节地型中央分隔带分设型波形梁护栏的防护等级,实验检测结果表明其防护等级达到SBm级,护栏的最大横向动态位移外延值为1.2 m,未侵入到对向车道的左侧路缘带,该护栏可应用于1.5 m宽的中央分隔带路段。Setting of the separate semi-rigid barrier of median section,not only the protective performance of the barrier should be considered,but also the affect of the opposite lane safety should be considered,so the minimum central divider width in the current specifications is 1795 mm for SBm-level barrier.When the width of the central divider of the highway is insufficient,it can't install the SBm-level separate W-beam barrier according to current specifications.Taking the maximum lateral dynamic widening distance value as the control parameter,four improved projects of land-saving separate W-beam barriers were proposed,and the protective performance of each improved scheme was studied through computer simulation analysis methods.Through the comparison of protective performance,construction difficulty,and cost,one project was selected to be the best,which can effectively control the maximum lateral dynamic widening distance value of the barrier,the protection level of the W-beam barrier of the central divider is verified by the full-scale vehicle crash test method,and the experimental test results showed that the protection level of the barrier can meet the SBm level requirements,the maximum lateral dynamic widening distance value of the barrier is 1.2 m,which not invade the left edge of the opposite lane,the barrier can be applied to the 1.5 m wide median section.

关 键 词：横向动态位移外延值 中央分隔带 节地 波形梁护栏 实车碰撞试验 

分 类 号：U417.12[交通运输工程—道路与铁道工程]