海底电缆保护的混凝土联锁块软体排抗拖锚稳定性分析

Stability analysis of anti-drag anchor of concrete interlocking block soft mattress for submarine cable protection

针对硬质海床上的电缆采用混凝土联锁块软体排进行覆盖保护的技术方案,对软体排的抗拖锚稳定性进行了分析。首先对拖锚过程中位于软体排上的锚体及锚爪进行受力分析,建立锚爪在软体排上的运动控制方程,据此求得锚爪在软体排上的运动条件及施加给软体排的作用力;之后对软体排及电缆进行受力分析,建立软体排及电缆的抗滑稳定性分析方程。利用所建立的软体排抗拖锚稳定性分析方法,对试验模型进行了计算分析,结果与试验吻合。结合工程中的软体排参数,讨论分析了对软体排的抗拖锚性能有影响的因素和影响规律,并提出了提高软体排抗拖锚稳定性的措施。

Aiming at the technical scheme of covering and protecting cables on hard seabed with concrete interlocking block soft mattress,the anti-drag anchor stability of soft mattress was analyzed.Firstly,the force analysis of the anchor body and the anchor claw on the soft raft during the anchor dragging process was carried out,and the motion control equations of the anchor claw on the soft raft were established.On this basis,the motion conditions of the anchor claw on the soft raft and the force applied to the soft raft were obtained.After that,the force analysis of soft mattress and cable was carried out,and the anti-sliding stability analysis equations of soft mattress and cable were established.Using the established stability analysis method of anti-drag anchor of soft raft,the test model was calculated and analyzed,and the results are in good agreement with the test.Combined with the parameters of soft raft in engineering,the factors and laws affecting the anti-drag anchor performance of soft raft were discussed and analyzed,and the measures to improve the anti-drag anchor stability of soft raft were put forward.