论文部分内容阅读
在桩基础设计过程中,岩土参数的准确性对基桩承载力计算结果至关重要。为研究岩土参数的不同取值对海上风电大直径钢管桩水平承载特性的影响,从不同岩土参数在水平承载特性中的敏感性问题,该文选取江苏某典型海上风电项目,采用数值模拟对工程进行简化建模,研究土体黏聚力c、桩土界面摩擦角φ、土体弹性模量E、剪胀角ψ不同取值对大直径钢管桩水平承载特性的影响。研究结果表明:1)抗剪强度与水平承载力正相关,且影响明显;2)土体弹性模量对水平承载力影响不明显;3)水平承载力随剪胀角的增大先增大后减小。研究结论可作为海上风电大直径钢管桩基础的设计参考。
In the process of pile foundation design, the accuracy of geotechnical parameters is very important for calculating the bearing capacity of pile. In order to study the influence of different geotechnical parameters on the horizontal bearing capacity of offshore wind power large diameter steel pipe pile, from the sensitivity of different geotechnical parameters in the horizontal bearing properties, this paper selects a typical offshore wind power project in Jiangsu Province, Simulations The simplified modeling of the project is carried out to study the influence of different values of cohesion c of soil body, friction angle of pile-soil interface φ, modulus of soil elasticity E and dilatancy angle ψ on horizontal bearing capacity of large diameter steel pipe piles. The results show that: 1) the shear strength is positively correlated with the horizontal bearing capacity, and the effect is obvious; 2) the elastic modulus of the soil has no obvious effect on the horizontal bearing capacity; 3) the horizontal bearing capacity firstly increases with the dilatancy angle After the decrease. The conclusion can be used as a reference for the design of large-diameter steel pipe pile for offshore wind power.