Study on anti-anchoring performance of riprap protective layer of submarine cable
ZHANG Tao
FAN Xiping
CHEN Jun
SHI Guangrui
ZHANG Youquan
WANG Ketao
LIU Sainan
Abstract：The implementation of riprap protection for submarine cables is one of the important meas-ures to ensure the safe and stable operation of the power grid.Aiming at the navigation and anchoring behavior of typical ships in offshore waters,this paper took random polyhedron particles as the basic u-nit based on the theory of discrete element correlation.The PFC3D software was used to establish the calculation model of anti-anchorage system of submarine cable riprap protective layer.Aiming at two different forms of anchor damage,i.e.,anchor smashing and anchor dragging,the anti-anchor damage performance of submarine cable was quantitatively analyzed according to the pressure limit of the side wall of submarine cable,with the thickness of riprap layer,anchor weight and anchor speed as the in-fluencing factors.The simulation results showed that the riprap protective layer dissipated the work of the external load of the anchor when the anchor was damaged and finally stopped the anchor through the formation,development,rupture,and reorganization of the particle force chain inside the rockfill,which could effectively protect the submarine cable.At the same time,it was proposed to detect and to repair the riprap protection in the submarine cable project with the riprap layer thickness of 0.9 m as the threshold,which provided a reference for the actual project.
Keywords：submarine cableriprap protectionoffshorepolyhedral particlesanchor damage
Publication Date：2025-12-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：11( 79-89 )