摘要
桩基在海洋工程中的应用越来越广泛。打入桩在打桩结束后承载力随时间的增加而增加,合理确定不同时间的桩基的承载力,可以优化桩基设计,合理安排打桩,节约工期并进一步节省工程造价。本文根据某场地实际打桩记录采用波动方程进行了反分析,对停锤后承载力恢复进行了评估。同时采用现有方法对承载力恢复进行了计算,并将计算结果与反分析结果相比较。分析结果显示,对于粉质黏土占比较大的场地,采用现有承载力恢复的计算公式得到的承载力数值偏小,提出了基于设计承载力进行承载力恢复评估的方法,该方法计算结果与现场打桩记录反分析计算结果吻合良好。
Pile foundation is widely used in ocean engineering.Since the bearing capacity of driven piles increases with time,to determine the bearing capacities of piles at different time can optimize the design of pile foundation,reasonably work out piling layout,shorten construction period and further lower project cost.Actual piling records are back-analyzed by using wave equation,complete with the evaluation of bearing recovery after piling.At the same time,the existing methods are used to calculate the bearing recovery.The comparative analysis results show that the existing methods lead to relatively small bearing value based on the site with a large proportion of silty clay.A bearing recovery evaluation method is proposed based on the design bearing capacity,and the calculation results are in good agreement with the back analysis results.
作者
黄怀州
刘洪涛
袁玉杰
谢圣杰
李飒
Huang Huaizhou;Liu Hongtao;Yuan Yujie;Xie Shengjie;Li Sa(Offshore Oil Engineering Co.,Ltd.,Tianjin 300459,China;Civil Engineering Department,Tianjin University,Tianjin 300072,China)
出处
《港口航道与近海工程》
2023年第4期36-40,共5页
Port,Waterway and Offshore Engineering
基金
国家自然科学基金(51890911)。
关键词
打桩
波动方程
反分析
承载力恢复
piling
wave equation
back analysis
bearing recovery
