跨海桥梁大直径钻孔桩冲击钻进参数研究

Study on Percussion Drilling Technology Parameters of Large Diameter Bored Piles of Sea Crossing Bridge

通过对冲击钻进技术进行理论分析,定性讨论各因素对钻孔桩冲击钻进速率的影响,再结合平潭海峡公铁两用大桥(B0～B58)的钻孔桩施工,对现场钻孔数据进行统计分析,得到不同地层所对应的钻孔参数变化关系。总结得出平潭海峡公铁两用大桥工程施工现场各冲击锤在不同地层宜采用的钻孔参数和钻进速率。

Through the study on the theoretical analysis of the percussion drilling technology, this paper discussed the effects of various factors on the impact bored pile drilling rate. Combining the iron dual bridge of Pingtan strait（B0～B58） drilling pile construction,statistical analysis is carried out on the field drilling data, and the changes of different strata of drilling parameters are find out. After comparison, this paper concluded drilling parameters and drilling rate of impact hammer in engineering construction site of different strata should be adopted.