湖南大学学报（自然科学版）2024，Vol.51Issue(3)：92-98,7.DOI:10.16339/j.cnki.hdxbzkb.2024031
深厚软土区桩柱式桥墩临界荷载简化计算方法
Simplified Calculation Method for Critical Load of Pile Piers in Deep Soft Soil Regions
摘要
Abstract
Existing simplified calculation methods for critical load of pile piers in bridge structures exhibit significant errors in most cases,limiting their applicability.Based on calibration using field load tests on pile foundations in soft soil regions,a finite element method based on eigenvalue buckling analysis was employed to calculate the critical load of typical pile piers and compared with the results obtained from existing simplified calculation methods.The study identified the applicability range of the existing simplified calculation methods and found that they are not suitable for calculating pile piers in soft soil regions.Using a large dataset of finite element eigenvalue buckling analysis results for pile piers,the random forest algorithm was applied to analyze the calculation results,yielding a random forest model capable of calculating the length of pile piers and determining the importance index of various influencing parameters.Finally,based on the form of commonly used simplified calculation formulas and incorporating the important parameters identified by the random forest algorithm,a simplified calculation method for determining the critical load of pile piers in deeply soft soil regions was proposed through regression analysis.关键词
桩柱式桥墩/临界荷载/有限元/随机森林Key words
pile type bridge pier/critical load/finite element method/random forest分类
建筑与水利引用本文复制引用
刘晓明,李曦,刘齐建,刘涛,殷悦,曾磊..深厚软土区桩柱式桥墩临界荷载简化计算方法[J].湖南大学学报（自然科学版）,2024,51(3):92-98,7.基金项目
国家自然科学基金资助项目(52178331),National Natural Science Foundation of China(52178331) （52178331）
