基于软基监测的某高速公路桥头跳车诊断分析

Diagnostic Analysis on Bridge-head Bumping Problem on Expressway based on Soft Soil Foundation Monitoring

以某高速公路为例,基于其软基监测数据,对桥头跳车进行诊断分析.重点分析了桥头段软基历年沉降在桥台纵断面方向上的变化规律,深入探讨了软基沉降的主要影响因素,系统总结了引起桥头跳车的主要原因.借助浅岗法预测了各桥台软基最终沉降量,并与基于现阶段地质资料的沉降计算值进行了对比分析,验证了二者结果的一致性.最后,对如何处理桥头跳车问题给出了合理性建议.

Taking one expressway as an example , this paper analyzes the bumping problem at bridge-head based on soft soil monitoring data and analyzes the settlement of vertical alignment direction of abutment at bridge -head in the past years .Then the main influencing factors of post-construction settlement are discussed and the reasons for the bumping at bridge-head are summarized .The final settlement of each abutment is predicted through Asaoka method , and the prediction is compared with settlement calculate value based on geological investigation data .Tests show that the two results are well consistent .Finally, some reasonable suggestions are provided to solve the bumping problem at bridge-head.