现浇混凝土薄壁管桩是一项全新的软基处理技术,该技术具有桩直径大,桩距大,混凝土用量省,单桩承载力高,工后沉降小,可处理深层软土等优点,但在江苏省高速公路上尚未应用过。江苏省高速公路建设指挥部联合有关单位在大丰一施工标段大丰南互通主线桥南北两侧桥头首次开展了现浇混凝土薄壁管桩(以下简称PCC管桩)新技术应用研究。 Cast-in-situ concrete thin-walled pipe pile is a new soft foundation treatment technology, which has the advantages of large pile diameter, large pile spacing, saving of concrete, high bearing capacity of single pile, small post-construction settlement and deep soft soil treatment , But has not been used on the expressway in Jiangsu Province. Jiangsu Provincial Expressway Construction Command jointly carried out the application research on the new technology of cast-in-place concrete thin-walled pipe piles (hereinafter referred to as PCC pipe piles) for the first time at the bridges on the north and south sides of the Dafeng South Interchange Bridge in the construction section of Dafeng-I.