Studies on pullout capacity of anchors in marine clays for mooring systems
Studies on pullout capacity of anchors in marine clays for mooring systems
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DOI：
10.1016/j.apor.2006.08.001
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发表时间：
2006-04-01
影响因子：
4.3
通讯作者：
Surendran, S.
中科院分区：
文献类型：
--
作者：
Rao, S. Narasimha;Latha, K. Hema;Surendran, S.
在海上应用中，单点或散布系泊系统用于为船只提供临时停泊。在本次研究中，建议根据水深的不同，采用桩锚和吸力锚。通过模型试验，得出了锚链倾角、粘性土在海床中的稠度、锚杆埋置率等参数对抗拔能力的影响。单桩、2桩、4桩锚由管桩组成，长径比为25.4 mm，L/D为10、14、18，模型吸力锚杆(闭式沉箱)直径为113 mm，L/D=2、3、4。结果表明，当锚链倾角由水平方向变为竖向方向时，桩锚的抗拔阻力由被动土压力变为侧摩阻力。关于吸力锚的结果可以用所提出的各种部件来解释。(C)2006爱思唯尔有限公司。保留所有权利。
In marine applications, single point or spread mooring systems are used for providing temporary berthing of vessels. In this investigation, it is suggested that pile anchors and suction anchors can be used depending on the water depth. By testing a model, the influence of parameters like mooring chain inclination, consistency of the clayey soil in the seabed and anchor embedment ratios on pullout capacity has been brought out. Tests were carried out on single pile, 2-pile, 4-pile anchors made out of pipe piles of 25.4 mm dia with length to diameter ratios, L/D of 10, 14 and 18 and model suction anchors (closed-top caisson) of 113 mm dia with L/D = 2, 3 and 4. These were installed in a model test bed made out of soft marine clay. The results indicate that in respect of pile anchors as of the chain inclination changes from horizontal to vertical direction, the pullout resistance shifts from passive earth pressure to skin friction. The results in respect of suction anchors can be interpreted in terms of various components proposed. (C) 2006 Elsevier Ltd. All rights reserved.