Uplift resistance capacity of anchor piles used in marine aquaculture

Fukun Gui,Xiaoyu Qu,Jianqiao Kong,Yang You,Dejun Feng,Fang Zhu

doi:10.1038/s41598-021-99817-5

Abstract

Anchor piles are widely used in marine aquaculture, and the safety is largely determined by the uplift resistance capacity,especially in harsh ocean environments. However, there are few practical guides to the design and installation of the anchor piles for mooring the body of marine aquaculture equipment. Laboratory experiments were conducted to investigate the effect of the initial tension angle, pile diameter, embedded depth, and pile configuration on the uplift resistance capacity of anchor piles under oblique loads. CCD camera and load cell were utilized to measure the corresponding displacement and load, respectively. The results show that increasing the initial tension angle of circular and square single piles can significantly improve the uplift resistance capacity. The failure load of the square single pile was slightly higher than that of the circular single pile. Increasing the pile diameter can effectively improve the failure load and delay the development speed of the pile top displacement. Increasing the embedded depth can effectively improve the failure load and increase the lateral displacement of the pile top. The uplift resistance capacity of the dual anchor piles was better than that of the single anchor piles. The layout configuration has little effect on the failure load, but has a large effect on the displacement development.

Highlights

Anchor piles are widely used in marine aquaculture, and the safety is largely determined by the uplift resistance capacity,especially in harsh ocean environments
The initial tension angle is a key factor that must be considered during the installation of the anchor pile
This study focuses on analyzing the data from the beginning of loading to the failure of the anchor pile

Summary

Introduction

Anchor piles are widely used in marine aquaculture, and the safety is largely determined by the uplift resistance capacity,especially in harsh ocean environments. Laboratory experiments were conducted to investigate the effect of the initial tension angle, pile diameter, embedded depth, and pile configuration on the uplift resistance capacity of anchor piles under oblique loads. Ayothiraman et al.[13] and Reddy et al.[14] conducted uplift laboratory model experiments with and without a lateral load found that the failure load increased in the case of lateral load, and the displacement and deflection of the pile top increased significantly This simplified analysis method does not fully consider the coupling effect of combined loads. Investigating the effect of the initial tension angle, pile diameter, embedded depth, and pile configuration on the uplift resistance to provide a practical guide for the application of anchor piles in marine aquaculture

Methods

Results

Conclusion