长螺旋干成孔压灌混凝土灌注桩工程应用与分析

Application and Analysis of Long Spiral Dry Pore-forming Pumping Concrete Grouting Pile

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。

Long spiral dry pore-forming pumping concrete grouting pile can be used in muhi-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.