水道港口2025，Vol.46Issue(2)：236-242,7.
基于Usher曲线模型的大直径单桩水平极限承载力预测
Prediction of horizontal ultimate bearing capacity of large-diameter single pile foundation based on Usher curve model
摘要
Abstract
The horizontal ultimate bearing capacity of large-diameter single pile foundation is an important factor in the design of single pile foundations.The design cost of large-diameter single pile foundation can be effectively reduced by predicting the horizontal ultimate bearing capacity using the test data of the test pile that has not reached the point of destruction.This paper carried out a field test under static load of large-diameter single piles and analyzed the horizontal load characteristics of large-diameter single pile foundations.The test showed that the horizontal load-displacement curve of the pile body conformed to the"S"type mathematical characteristics of the Usher curve.A prediction model for the horizontal ultimate bearing capacity of large-diameter single piles based on the Usher curve was established and the optimization solution method based on the nonlinear least squares method was studied.An ABAQUS numerical model of the test pile was established.The prediction results of the Usher curve prediction model were compared and verified.The results show that the Usher curve prediction model has high fitting accuracy with the measured horizontal load-displacement curve.The horizontal ultimate bearing capacity predicted by the Usher curve prediction model is about 2 156 kN,which calculated by the ABAQUS numerical model is about 2 140 kN.The comparison shows that the error is only 0.75%.The Usher curve model can be used to predict the horizontal ultimate bearing capacity of large-diameter single pile foundations.关键词
大直径单桩/现场试验/Usher曲线/水平极限承载力/ABAQUSKey words
large-diameter single pile/field test/Usher curve/horizontal ultimate bearing capacity/ABAQUS分类
交通工程引用本文复制引用
钱荣荣,苏静波,吴锋,倪晓雯,鲍金虎..基于Usher曲线模型的大直径单桩水平极限承载力预测[J].水道港口,2025,46(2):236-242,7.基金项目
国家自然科学基金资助项目(51679081) （51679081）
