高速公路桥头跳车病害的分析与治理方法探讨

Probe into Expressway Bridgehead Bumping Defect Analysis and Harnessing

根据高速公路桥头跳车病害探地雷达检测结果,结合路基实际工程地质资料及沉降观测值,分析出造成此病害的原因是桥与路之间沉降差异所致,故搭板与垫层和垫层与路基之间产生了脱空,造成桥搭板、垫层碎裂而出现了桥头跳车病害。针对病害根源,采用了压密注浆进行搭板加固及重新摊铺沥青混合料进行调坡处理的治理方法。

According to ground penetrating radar detecting result of expressway bridgehead bumping defect, incorporated actual roadbed engineering geological data and settling observation, considered that the defect is caused by differential settlement between the bridge and the road. That caused cavity between buttstrap and bedding course, bedding course and roadbed, again, the cavity caused crumbling of buttstrap and bedding coupe and then bridgehead bumping come into being. Aimed at the root. soil compaction grouting, buttstrap consolidating, bituminous mixture repaying, gradient adjusting are used to bring the bumping under control.