The effect of spudcan footprints on the vertical bearing capacity of adjacent pile foundations. (16th March 2021)

• Record Type: Journal Article
• Authors: Liang, Chao; Liu, Run; Zhang, Haiyang; Li, Chengfeng; Yuan, Yu; Cao, Tianming
• Is Part Of: Ships and offshore structures. Volume 16:Number 3(2021)
• Page Start: 292
• Page End: 305
• Publication Date: 2021-03-16
• Subjects: Spudcan footprints -- footprint unloading -- vertical bearing capacity -- footprint area -- affected area; Ships -- Periodicals; Offshore structures -- Periodicals; Marine engineering -- Periodicals; Marine engineering -- Technological innovations -- Periodicals; Ocean engineering -- Periodicals; Ocean engineering -- Technological innovations -- Periodicals; 623.8
• DOI: 10.1080/17445302.2020.1725278
• Languages: English
• ISSNs: 1744-5302

Abstract

ABSTRACT: It is well recognised that footprints are formed during the spudcan insertion process, which can have a negative impact on adjacent pile foundations.This research presents a simplified three-dimensional finite element model to analyse the effect of footprints on the vertical bearing capacity of adjacent piles in clay. The soil parameters around the footprint were obtained via a comparative analysis of the results yielded by the hole-edge stress theory, a triaxial unloading shear test and an unloading state model test. Based on the simplified three-dimensional finite element model, the skin friction resistance changes of piles under different footprint depths, footprint diameters, and dimensionless distances L / D were calculated. The results showed that the reduction rate of the skin friction resistance of the pile decreases with increasing L / D and increases with increasing footprint diameter and footprint depth. .