岩土工程学报2024，Vol.46Issue(z1)：180-185,6.DOI:10.11779/CJGE2024S10026
海上风电大直径超长钢管桩竖向承载特性现场试验研究
Field tests on vertical bearing characteristics of large-diameter extra-long steel pipe piles in offshore wind power projects
韩冉冉 1乔小利 1李明玉1
作者信息
- 1. 交通运输部天津水运工程科学研究院,天津 300456
- 折叠
摘要
Abstract
The steel pipe piles are the main foundation type for offshore wind power projects,but there are relatively few researches on the vertical bearing capacity of large-diameter ultra-long steel pipe piles in the sea.The field tests are conducted on the vertical bearing capacity characteristics of the large-diameter ultra-long steel pipe piles based on their application in an offshore wind power project in Shantou City of China.The variation rules of side shaft friction and tip resistance with pile load are analyzed,and the variation characteristics of tip settlement and top settlement of the pipe piles are compared.Additionally,based on the on-site test results,the method for determining the bearing capacity of the large-diameter ultra-long steel pipe piles is explored.The tests results indicate that there is a significant pile deformation.It was easier to control and adjust the on-site loading amount by using the curve of tip settlement versus load,and it is also easier to judge the ultimate state of bearing capacity.The curve of tip resistance versus pile load shows an"S"shape.In the current code,the load corresponding to the point at which the slope of Q/Qmax～s/d curve begins to change to 0.2 is used as the ultimate bearing capacity to overestimate the vertical compressive ultimate bearing capacity of the large-diameter ultra-long steel pipe piles.关键词
超长钢管桩/竖向承载特性/侧摩阻力/端阻力/桩身变形Key words
ultra-long steel pipe pile/vertical bearing characteristic/side shaft friction/tip resistance/pile deformation分类
建筑与水利引用本文复制引用
韩冉冉,乔小利,李明玉..海上风电大直径超长钢管桩竖向承载特性现场试验研究[J].岩土工程学报,2024,46(z1):180-185,6.
