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基于有限元-边界元耦合方法的嵌岩群桩时效行为研究

CHEN Yuanfeng AI Zhiyong MA Zhanguo YE Zikun MAO Xianbiao

岩土工程学报2026，Vol.48Issue(1)：115-125,11.

岩土工程学报2026，Vol.48Issue(1)：115-125,11.DOI:10.11779/CJGE20240782

基于有限元-边界元耦合方法的嵌岩群桩时效行为研究

Research on time-dependent behavior of rock-socketed pile group based on FEM-BEM coupling method

CHEN Yuanfeng ¹AI Zhiyong ²MA Zhanguo ³YE Zikun ²MAO Xianbiao³

作者信息

1. College of Geology and Mining Engineering,Xinjiang University,Urumqi 830046,China||School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China||State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China||Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China
2. Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China
3. School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China||State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China
折叠

摘要

Abstract

For time-dependent behavior of rock-socketed pile groups,the finite element method is utilized to discretize the pile group into single pile and pile elements,and the global stiffness matrix equation of the pile group can be obtained by assembling pile elements simulated by three-nodal axial rods.Then,the fractional Merchant model and the fractional Poyting-Thomson model are introduced to describe the viscoelastic characteristics of the overlying soil layer and saturated soft rock,respectively.Based on the coupling equation of the interaction between the saturated rock-soil mass and the rock-socketed pile group,and the equilibrium condition and the compatibility condition of pile cap,the matrix solution of the top reaction force of each single pile and the displacement of the cap is derived.Combining Li's analogy method and the Laplace transformation technology,the solution to the time-dependent behavior of vertically loaded rock-socketed pile group is finally obtained.Some examples are designed to discuss the influence of the fractional order and the viscoelastic parameter of rock mass on the time-dependent behavior of the pile group,showing that the deformation of the pile cap and the top reaction force of each pile in rock-socketed pile group gradually increases over time and eventually stabilize.

关键词

分数阶Merchant模型/分数阶Poyting-Thomson模型/饱和软岩/嵌岩群桩/时效行为

Key words

fractional Merchant model/fractional Poyting-Thomson model/saturated soft rock/rock-socketed pile group/time-dependent behavior

分类

建筑与水利

引用本文复制引用

CHEN Yuanfeng,AI Zhiyong,MA Zhanguo,YE Zikun,MAO Xianbiao..基于有限元-边界元耦合方法的嵌岩群桩时效行为研究[J].岩土工程学报,2026,48(1):115-125,11.

基金项目

国家重点研发计划项目(2019YFE0118500) （2019YFE0118500）

江苏省卓越博士后计划项目(JB0205039)This work was supported by National Key Research and Development Program of China(Grant No.2019YFE0118500)and Jiangsu Funding Program for Excellent Post-doctoral Talent(Grant No.JB0205039). （JB0205039）

岩土工程学报

ISSN：1000-4548

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