摘要
桩身内力是静载试桩研究中一项重要的测试参数,对工程设计的优化、施工工艺的选择起到至关重要的作用,关系到工程成本、工程安全。对于复杂的海上风电大直径超长钢管桩的内力测试,传统的方法存在传感器成活率低、测试间断、精度差等缺陷,因此引入了基于布里渊散射光频域分析的分布式光纤感测技术--BOFDA法。通过实例验证,该方法测试数据连续、测试距离长、抗干扰能力强,分析得到的侧摩阻力可作为优化桩长的重要依据,为相关测试研究提供参考与指导。
The internal force of pile body is an important parameter in the research of static load test pile detection.It plays a vital role in the optimization of engineering design and the selection of construction technology,and is related to engineering cost and engineering safety.For complex offshore wind power large diameter and super-long steel pipe pile internal force testing,the traditional method has the defects of low sensor survival rate,discontinuous testing,poor accuracy,etc.Therefore,a distributed optical fiber sensing technology based on Brillouin scattering light frequency domain analysis-BOFDA method is introduced.Examples show that the method has continuous test data,long test distance and strong anti-interference ability.The analysis of lateral friction can be used as an important basis for optimizing pile length and provide some reference and guidance for related test research.
作者
刘钊
田韩续
黎双邵
LIU Zhao;TIAN Han-xu;LI Shuang-shao(CCCC Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China;Tianjin University,Tianjin 300072,China)
出处
《中国港湾建设》
2019年第11期42-45,共4页
China Harbour Engineering
基金
天津市自然科学基金(17JCQNJC07200)
关键词
桩身内力
静载试桩
海上大直径超长钢管桩
分布式光纤感测
BOFDA法
internal force of pile body
static load test pile
offshore large diameter super-long pile
distributed optical fiber sensing
BOFDA method
