桥头跳车原因分析、状况评定及处治技术探讨

桥头跳车是影响公路行驶安全性和舒适性的通病之一。依托高速公路桥头跳车专项处治实体工程，进行原因分析；采用沉降观测、雷达测试、取芯等手段，对桥头跳车状况进行评定；为改善桥头跳车状况，提出了基于搭板脱空补强的反开挖处治桥头跳车技术方案，并依托工程实施，研究总结了桥头跳车处治施工整套工艺，同时对处治效果跟踪监测。应用结果表明:采用反开挖法进行桥头跳车处治具有显著效果，且耐久性较好，可为类似桥头跳车处治工程提供借鉴和参考。

On Causes Analysis,Condition Evaluation and Treatment Technology for Bumping at Bridge Head

Bumping at bridge head is one of the most common diseases affecting safety and comfort in driving on highway. Based on the special solid works for treatment of bumping at bridge head on highway, the causes thereof were analyzed; and by means of settlement observation, radar detection and coring, the condition of the bumping was evaluated ; then in order to improve this condition, the technical scheme of back excavation based on reinforcement for wild under the approach slab was proposed, and during the implementation of the works, a set of construction technology for treatment of the bumping was generalized, simultaneously, the treatment effect was traced and monitored. The result of application shows that the back excavation has obvious treating effect on bumping at bridge head and excellent durability, which could be referred by similar works for treatment of bumping at bridge head.