确定处理桥头跳车中加固段长度的探讨

Discussion About Length -Determination of the Stabilized Roadbed to Prevent Vehicle Dump on Bridge Head

为了防止桥头跳车的出现,在桥头路基的设计中,确定加固段长度时,一般只考虑各种处理方法对台后填土的加固作用,而未考虑到加固段在道路正常使用时还起到了对正常路基与桥台差异沉降的过渡作用。通过分析加固段在道路使用中的作用和汽车的行驶轨迹,对不同设计车速的道路桥头加固段长度给出了建议值。从算例比较可以看出,在考虑了加固段在道路正常使用时对正常路基与桥台差异沉降的过渡作用所得的结果更为合理。

In order to prevent vehicle dump on bridge head, that the reinforcement of all kinds of solutions is considered, but the transition of the differential settlement on the abutment and normal roadbed by reinforced part is not in roadbed-design on bridge head. Through the analysis of the function of the reinforced part and the movement track of vehicle, the proposal value of length of reinforced roadbed is given for different design velocities. The result is more reasonable by considering the transition of the differential settlement on the abutment and normal roadbed.