桥梁施工全过程超长钻孔灌注桩承载性能的现场监测

桩基承载性能一直是工程技术人员重点关注的课题。目前关于超长钻孔桩的承载性能试验研究主要为荷载试验,反映的是桩基施工完成后某一时刻的承载性状,而对于桩基承载性能的长期连续监测较少研究。依托钱江通道及接线工程南接线段高架桥施工,开展了桥梁施工全过程超长钻孔桩承载性能的现场监测研究,介绍了监测内容、监测方式、传感器布设等方面,重点分析了桥梁施工全过程桩身轴力和桩侧摩阻力的变化情况,可为运营期钻孔桩长期承载性能的现场监测提供参考。

Field Monitoring for Bearing Behavior of Super Long Bored Pile in the Whole Bridge Construction

Bearing behavior of pile foundation has been a problem which engineers focus on. Currently,test research on bearing behavior of super long bored pile is mainly to the load test,it reflect a certain time bearing characters after the completion of the pile foundation construction,but the long term continuous monitoring for bearing behavior of pile foundation is less. This paper was based on viaduct construction of the Qian Jiang Channel project,field monitoring for bearing behavior of super long bored pile in the whole bridge construction has been carried out,and monitoring contents,monitoring methods,sensor layout and so on were introduced,the change of pile axial force and shaft soil resistance of pile were emphatically analyzed,so having basis of filed monitoring for long term bearing behavior of bored pile in operation period.