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（暨南大學(xué)力學(xué)與土木工程系 廣州 510632）
【提要】 長(zhǎng)螺旋干成孔壓灌混凝土樁適合于多層及小高層基礎(chǔ)工程。結(jié)合實(shí)際工程，對(duì)長(zhǎng)螺旋干成孔壓灌混凝土灌注樁單樁承載力的確定方法進(jìn)行了研究，通過(guò)理論計(jì)算值與實(shí)測(cè)值的對(duì)比分析，指出在計(jì)算單樁承載力時(shí)，以實(shí)際樁徑作為計(jì)算依據(jù)比較切合實(shí)際，計(jì)算時(shí)可將充盈系數(shù)i轉(zhuǎn)化為實(shí)際樁徑與理論樁徑之比（其值為i），在此基礎(chǔ)上給出了計(jì)算實(shí)際單樁豎向極限承載力標(biāo)準(zhǔn)值的修正公式。
【關(guān)鍵詞】 長(zhǎng)螺旋 干成孔 壓灌混凝土 灌注樁
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