一、问题的提出城市一体化进程中,高层建筑迅速增多,尤其是60m高度以下的高层建筑,其基础使用先张法预应力混凝土管桩,60m以上的高层建筑基础使用灌注桩,灌注桩成本高于管桩。住宅开发商为降低成本,要求设计院对小高层、高层(60m以下)尽量使用管桩,在沿海软土地基地区使用管桩十分广泛。管桩从制作到运输至施工现场需7~8次吊运,管桩采用离心工艺成型,成型 First, the problem raised In the process of urban integration, the rapid increase in high-rise buildings, especially in the high-rise buildings below 60m height, the use of pre-tensioned prestressed concrete pipe piles, high-rise building 60m above the use of bored piles, bored pile costs Higher than the pipe pile. In order to reduce costs, residential developers asked the design institute to make full use of pipe piles for small high-rise and high-rise buildings (under 60m) and use a wide range of pipe piles in coastal soft-soil areas. Pipe from the production to transport to the construction site to be 7 to 8 lifting, pipe piling process using centrifugal molding, molding