Failure criterion of double-plate vertically loaded anchor in saturated marine fine sand under monotonic loading

Abstract

The critical penetration depth and failure displacement of vertically loaded anchor (VLA) have already been investigated. However, only few investigations focused on the double-plate VLA. Therefore, based on the finite element method, the critical penetration depth for the double-plate VLA was obtained, which is approximately 6.0 times the width of the upper fluke of the double-plate VLA. According to the reduced-scale model tests, the failure displacement of the double-plate VLA with different included angles and dimensions of the bottom fluke under shallow-embedded and deep-embedded conditions was obtained. Furthermore, the failure displacement of double-plate VLA with 30° included angle and the dimension of bottom fluke equal to that of upper fluke under shallow-embedded and deep-embedded condition is 0.29 and 0.67 times the width of upper fluke, respectively. Based on the empirical bearing capacity formula for VLA model, an improved bearing capacity formula for double-plate VLA model has been put forward; by means of the improved bearing capacity formula, the coefficient of bearing capacity for double-plate VLA under shallow-embedded and deep-embedded condition is obtained to be 5.013 and 4.106, respectively.

Keywords:

• Double-plate vertically loaded anchor
• saturated marine fine sand
• failure criterion
• critical penetration depth
• monotonic loading
• coefficient of bearing capacity

Acknowledgements

The authors are also grateful to Mr. Kai Jia, Mr. Junjie Yi, Mr. Xinzhou Du, Mr. Jinhui Ma, and Mr. Xinchao Ye for their generous assistance with this work.

Disclosure statement

The authors declare that they have no financial or personal relationships with anyone or any entity whose interests could be positively or negatively influenced by the content of this paper.

Additional information

Funding

This work was financially supported by the National Natural Science Foundation of China (Grant No. 52178347) and Natural Science Foundation of Shandong Province (Grant No. ZR2021ME068).