Lang Ruiqing, Liu Run, Lian Jijian, Ding Hongyan
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China.
ScientificWorldJournal. 2014;2014:394104. doi: 10.1155/2014/394104. Epub 2014 Aug 28.
Because offshore wind turbines are high-rise structures, they transfer large horizontal loads and moments to their foundations. One of the keys to designing a foundation is determining the sensitivities and laws affecting its load-bearing capacity. In this study, this procedure was carried out for a new high-rise cap pile group foundation adapted to the loading characteristics of offshore wind turbines. The sensitivities of influential factors affecting the bearing properties were determined using an orthogonal test. Through a combination of numerical simulations and model tests, the effects of the inclination angle, length, diameter, and number of side piles on the vertical bearing capacity, horizontal bearing capacity, and bending bearing capacity were determined. The results indicate that an increase in the inclination angle of the side piles will increase the vertical bearing capacity, horizontal bearing capacity, and bending bearing capacity. An increase in the length of the side piles will increase the vertical bearing capacity and bending bearing capacity. When the length of the side piles is close to the central pile, the increase is more apparent. Finally, increasing the number of piles will increase the horizontal bearing capacity; however, the growth rate is small because of the pile group effect.
由于海上风力涡轮机是高层建筑结构，它们会将巨大的水平荷载和弯矩传递到其基础上。设计基础的关键之一是确定影响其承载能力的敏感性和规律。在本研究中，针对一种适应海上风力涡轮机荷载特性的新型高层桩帽群桩基础开展了这一过程。使用正交试验确定了影响承载特性的影响因素的敏感性。通过数值模拟和模型试验相结合，确定了边桩的倾斜角度、长度、直径和数量对竖向承载能力、水平承载能力和抗弯承载能力的影响。结果表明，边桩倾斜角度的增加会提高竖向承载能力、水平承载能力和抗弯承载能力。边桩长度的增加会提高竖向承载能力和抗弯承载能力。当边桩长度接近中心桩时，这种增加更为明显。最后，增加桩数会提高水平承载能力；然而，由于群桩效应，增长率较小。
