某高等级公路桥头路基预抛高新方法

首先对桥头跳车现象作了概述,以某高等级公路改建工程为例,分析了桥头跳车的原因,对预抛高值的计算进行了探讨,并指出该工程根据专业单位沉降监测计算的预抛高值,采用直接抬高搭板尾枕梁,用宕渣进行抛高,节省了大量工程费用,该方法可推广应用。

New method of the height with allowance of the bridge-head roadbed of the high-grade highway

The paper firstly summarizes the phenomenon of bumping at bridge-head,analyzes the cause of bumping at bridge-head taking the reconstruction project of the high-grade highway as an example,discusses the calculation of the height with allowance,and points out that the project saves the engineering cost by directly elevating the approach slab bolster and carrying out the height with allowance by using the slag based on the height with allowance value of the sedimentation test of the professional units,and the method is worth popularizing.