张北段避险车道改造研究

Research on the reconstruction of emergency lane of Zhangjiakou to Beifing section

张石高速张北段有个"死亡谷",短短3个月内,发生了4起严重的交通事故。通过现场勘测、分析,决定对该处避险车道从设计、材料、施工三方面全新改造。改造后的避险车道平、纵、横三维立体线形合理,坡床材料滚动阻力系数增大,成功救助了数十量失控货车,达到了预期目的。

The Zhangjiakou to Beijing section of Zhangjiakou to Shijiazhuang expressway has a ＂death valley＂,there are four serious traffic accidents in only three months.According to the site investigation and analysis,decides to reconstruct the emergency lanes here from three aspects of design,material and construction.After reconstructing,the three-dimensional stereoscopic linear of emergency lane becomes reasonable and the rolling resistance coefficient of slope bed materials increases,which saves dozens of trucks out of control and reaches the expected purpose.