公路桥梁的钻孔灌注桩设计研究

Research on Design of Bored Pile for Highway Bridge

当前,工程领域对于桩结构的承载性能已有较多研究,在桩基变形以及荷载传递方式等方面也有较多的研究成果,但因为对土体材料作用的研究还存在一定的不确定性,因此,尚不具备可全面考虑这些因素的设计方法。论文以某高速公路桥梁的钻孔灌注桩为例,从静载试验的角度对其极限承载力进行了分析,基于当前钻孔灌注桩桩长设计的缺点,引入了有效桩长的概念,并给出相应的解析解,为优化设计提供参考。

At present,there have been many researches on the bearing capacity of pile structure,including the deformation of pile foundation and the mode of load transfer.However,there are still some uncertainties in the research on the action of soil materials,so there is no design method that can fully consider these factors.Based on the bored pile of an expressway bridge,this paper analyzes its ultimate bearing capacity from the angle of static load test.Based on the shortcomings of the current design of bored pile length,the concept of effective pile length is introduced and the corresponding analytical solution is given,which provides a reference for optimal design.