杭州市建筑设计院和下城区建筑工程公司、省机械化施工公司为寻求适用杭州地质情况,质量理想,经济效益显著的新桩型,成功地研究采用了端部夯扩成大头的基础施工方法——“夯扩短桩”法。采取这种新型的打椿法,能增大桩端截面,改善桩尖持力土层的性质,与常用的沉管灌注桩比较,可提高单桩承载力百分之六十到一 Hangzhou Architectural Design Institute and Xiacheng Construction Engineering Company and Provincial Mechanization Construction Company successfully applied the basic construction method of the end of ramming into large heads to find a new type of pile with favorable geological conditions, high quality and remarkable economic benefits. - “Shortly-expanded piles” method. Adopting this new type of snoring method can increase the cross section of the pile tip and improve the properties of the pile tip bearing soil layer. Compared with the commonly used immersed pipe cast-in-place piles, it can increase the bearing capacity of single piles by 60 to one percent.