岩土工程学报2026，Vol.48Issue(4)：866-875,10.DOI:10.11779/CJGE20250044
基于分域耦合FEM-DEM多尺度方法的砂土中闭口和开口桩沉桩过程模拟
Simulation of closed-ended and open-ended pile installation in sand using domain-decomposition coupled FEM-DEM multiscale approach
摘要
Abstract
This study simulates monotonic jacking processes of closed-ended and open-ended piles in sand using GeoTaichi,a self-developed GPU-accelerated domain decomposition coupled FEM-DEM multiscale platform.The methodology partitions the computational domain into DEM-controlled near-pile regions for soil-structure interaction and FEM-modeled far-field regions for enhanced efficiency.Contact model parameters for DEM and Mohr-Coulomb parameters for FEM are calibrated via simulated triaxial drained compression tests and experimental data.Validation against model chamber tests confirms the reliability of coupled FEM-DEM in replicating pile tip resistance and radial stress distribution for closed-ended piles.Subsequent analyses of open-ended piles with different diameters reveal soil deformation patterns,plug length ratio(PLR),incremental filling ratio(IFR),and driving resistance evolution.Results demonstrate IFR's superior sensitivity over PLR in reflecting soil plug evolution,with internal plug friction trends aligning with IFR variations.This study offers an efficient numerical tool that enhances the understanding of pile-soil interaction mechanisms and aids in calculating the capacity of driven piles.关键词
分域耦合/FEM-DEM/沉桩过程/桩土相互作用/GeoTaichiKey words
domain-decomposition/FEM-DEM/pile installation/pile-soil interaction/GeoTaichi分类
建筑与水利引用本文复制引用
郭远灏,史亦皓,郭宁,杨仲轩..基于分域耦合FEM-DEM多尺度方法的砂土中闭口和开口桩沉桩过程模拟[J].岩土工程学报,2026,48(4):866-875,10.基金项目
国家重点研发计划项目(2023YFB2604200) （2023YFB2604200）
浙江省杰出青年科学基金项目(LR23E080001) （LR23E080001）
国家自然科学基金项目(52338008) （52338008）
中央高校基本科研业务费专项项目(226-2024-00112)This work was supported by the National Key R&D Program of China(Grant No.2023YFB2604200) （226-2024-00112）
Zhejiang Provincial Natural Science Foundation of China(Grant No.LR23E080001) （Grant No.LR23E080001）
National Natural Science Foundation of China(52338008) （52338008）
Fundamental Research Funds for the Central Universities(Grant No.226-2024-00112). （Grant No.226-2024-00112）
