（暨南大学力学与土木工程系 广州 510632）
【提要】 长螺旋干成孔压灌混凝土桩适合于多层及小高层基础工程。结合实际工程，对长螺旋干成孔压灌混凝土灌注桩单桩承载力的确定方法进行了研究，通过理论计算值与实测值的对比分析，指出在计算单桩承载力时，以实际桩径作为计算依据比较切合实际，计算时可将充盈系数i转化为实际桩径与理论桩径之比（其值为i），在此基础上给出了计算实际单桩竖向极限承载力标准值的修正公式。
【关键词】 长螺旋 干成孔 压灌混凝土 灌注桩
Application and Analysis of Long Spiral Dry Poreforming Pumping Concrete Grout
ing Pile/Li Yuanping，Chen Xiaoping(Dept. of Civil Engineering, Jinan University, Guangzhou 510632, China)
Abstract:Long spiral dry poreforming pumping concrete grouting pile can be used in multistory buildings and low huge buildings. Combining with a real engineering, the calculation method of pile bearing capacity of long spiral dry poreforming pumping concrete grouting pile is studied. According to the comparison of theoretical value with measured value, it can be concluded that it is appropriate to consider the actual pile diameter when calculating the bearing capacity. Based on the fill coefficient i, which is defined by the ratio
 of actual diameter to theoretical diameter, the modified formula for calculating the bearing capacity of long spiral dry poreforming pumping concrete grouting pile is put forward.
Keywords:long spiral; dry poreforming; pumping concrete； cast in place pile