广东水利水电Issue(10)：11-16,35,7.
前密后疏双排桩受力变形的数值模拟分析
Numerical Simulation Analysis of Mechanical Deformation in Front-Dense and Back-Sparse Double-Row Piles
摘要
Abstract
The front-dense and back-sparse double-row piles are widely used in engineering,yet their mechanical mechanisms and computational models remain unclear.This study investigates the deformation and load transfer characteristics of four double-row pile configurations through finite element numerical simulation.Key findings include:①Increasing back-row pile spacing elevates bending moments in both rows,with significantly higher growth rates in back-row piles than front-row ones.The moment increase shows non-proportional correlation with spacing,rendering traditional moment amplification methods based on spacing multiples inapplicable.②Front-row piles exhibit maximum bending moments at mid-depth of excavation,with inflection points at the excavation base and subgrade maximum moments at one-third excavation depth.Back-row piles concentrate maximum moments at pile tops while sharing consistent subgrade moment distribution and inflection point patterns with front-row piles.③The capping beam between pile tops remains constantly in tension.The displacement transfer mechanism follows a"front-row-pile-first"pattern where front-row displacement induces capping beam tension to mobilize back-row displacement,fundamentally differing from traditional models assuming"back-row compression-driven"mechanisms.These findings reveal unique load transfer patterns in front-dense double-row pile systems,providing theoretical basis for optimizing pile spacing,capping beam design,and construction control.The research offers valuable references for improving current design codes of double-row pile models.关键词
基坑工程/双排桩/数值模拟/前密后疏/荷载传递Key words
foundation excavation engineering/double-row piles/numerical simulation/front-dense and back-sparse configuration/load transfer分类
建筑与水利引用本文复制引用
陈富强,杨光华,张挺,杜秀忠,贾恺..前密后疏双排桩受力变形的数值模拟分析[J].广东水利水电,2025,(10):11-16,35,7.基金项目
国家自然科学基金项目(编号:52078143). （编号:52078143）
