Influence Analysis of Large-area PHC Pipe Pile Construction on the Surrounding Environment in Deep Silt Site

• Published in: IOP conference series. Earth and environmental science 2021-01, Vol.643 (1), p.12010
• Main Authors: Zheng, Zhongliang, Ding, Jihui, Li, Xiaoqing, Su, Shuyu, Zhang, Cong
• Format: Article
• Language: English
• Subjects: Coastal zone; Construction; Dredgers; Exponential functions; Foundation construction; Pile foundations; Pile groups; Pipe piles; Position measurement; Silt; Soils
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/643/1/012010

There are a large number of deep and thick soft soil foundations along the river and coastal areas. PHC pipe piles have become one of the foundation treatment methods widely used in soft soil foundations. Taking the construction of a pile foundation project in Wenzhou as an example, the thickness of the dredger fill and silt at the site is 27.20∼33.60m, and the impact of large-area pile group construction on the surrounding environment is discussed. The results show that: (1) The load imposed on the pile top and the pile sinking depth during the construction of the foundation pile increase according to an exponential function. (2) The direction of horizontal soil squeezing deformation around the field is related to the position of the measuring point. The corner range is small and the middle range is larger, but the direction of maximum displacement is basically along the shortest line between the pile position and the measuring point. (3) The vertical direction of the measuring point varies greatly with the construction time and pile position, and the uplift and settlement appear repeatedly. The monitoring results can provide a reference for the construction of similar projects.