高速公路与铁路并行路段防撞挡墙设计研究

Study on Design of Bumping Wall along Section of Highway Parallel with Railway

针对高速公路与铁路并行路段,既有高速公路通行的大型车辆会对铁路路基存在潜在安全隐患的问题,通过在高速公路路肩处设置波形护栏和混凝土挡墙,以防止车辆对铁路路基造成破坏。结合实际情况,建立了车辆-挡墙碰撞模型,通过分析挡墙的极限受力,确定了最大安全撞击力,再由碰撞力计算公式反求得到车辆的初始碰撞限速和车辆限重。计算结果表明:对通过高速公路毗邻铁路路基段载重货车及大型客车进行适当限速和限重,并设置SS级波形护栏及混凝土防撞挡墙,可以起到保护铁路路基安全的作用。

For the section of highway parallel with railway, safety hazard to the railway s large vehicles running thereon lead to potential and concrete wall set at shoulder of the highway could play a role of preventing the subgrade from damage caused by these vehicles. Combining with the actual situation, vehicle-wall collision model is established to the extent that the ultimate force on the wall is analyzedto confirm the maximum secure impact torce, as sucia, the initial collision 8peeu atttt uie v^itxt.x~ ~l^l., is solved reversely by the formula of impact force. The calculating results show that both appropriate limitation on speed and weight of loaded truck and large passenger car passing section of highway adjacent to railway subgrade, and SS-class waveform guardrail and concrete bumping wall set there could protect the railway subgrade.