岩土力学2024，Vol.45Issue(1)：173-183,11.DOI:10.16285/j.rsm.2023.0121
混凝土芯水泥土复合桩竖向承载特性分析方法
Analytical approach to axially loaded concrete core-cement soil composite pile
摘要
Abstract
The authors propose a double-layer composite straight beam model that incorporates the Euler beam theory and the state space method to account for the nonlinear interaction between concrete core,cement soil,and surrounding soil interfaces.This model allows for convenient derivation of general solutions for internal forces and deformations for different combinations of piles in layered soil.By employing the state space method,the model effectively considers soil-structure interactions and variations in local structural parameters when analyzing composite piles.To validate the proposed solution,field test results and numerical analysis findings from existing literature are compared.The obtained analytical solution aligns well with these validation sources.Additionally,using the derived analytical solution,the authors investigate the effects of various pile parameters on pile loading responses.Specifically,they analyze the impacts of pile diameter ratio,core length ratio,and Young's modulus of the cement soil.The results indicate that increasing the diameter ratio reduces pile settlement and increases pile bearing capacity due to enhanced total side friction resistance and tip resistances.Increasing the core length ratio also leads to higher pile bearing capacity with an increasing growth rate.However,the Young's modulus of the cement soil has a negligible influence on pile bearing capacity.关键词
混凝土芯水泥土复合桩/竖向受荷/桩-土相互作用/Euler梁/状态空间法Key words
concrete cored-cement soil composite pile/axial loading/pile-soil interaction/Euler beam/state space method分类
建筑与水利引用本文复制引用
张晓笛,段冰,吴健,王金昌,杨仲轩,龚晓南,徐荣桥..混凝土芯水泥土复合桩竖向承载特性分析方法[J].岩土力学,2024,45(1):173-183,11.基金项目
浙江省"尖兵""领雁"研发攻关计划(NO.2022C03180),浙江省交通运输重大研发项目(NO.ZJXL-JTT-202201A),国家自然科学基金项目(NO.52078457),浙江大学-浙江交工协同创新联合研究中心资助(NO.ZDJG2021001)This work was supported by the Key Research and Development Program of Zhejiang Province(2022C03180),the Key R&D Project of Zhejiang Communication(ZJXL-JTT-202201 A),the National Science Foundation of China(52078457)and Zhejiang University-Zhejiang Communications Construction Group Institute of Collaborative Innovation(ZDJG2021001). （NO.2022C03180）
