桩墙组合锚碇受沉渣厚度影响的数值分析研究  

Numerical Analysis and Research on the Impact of Sediment Thickness on Pile-Wall Composite Anchorage

作　　者：王大伟 黄展赫 付佰勇 木林隆[2,4] WANG Da-wei;HUANG Zhan-he;FU Bai-yong;MU Lin-long(Guangxi Transportation Investment Group Co.Ltd.,Nanning 528400,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;CCCC Highway Bridges National Engineering Research Centre Co.Ltd.,Beijing 100088,China;National Key Laboratory of Disaster Prevention and Reduction in Civil Engineering,Shanghai 200092,China)

机构地区：[1]广西交通投资集团有限公司,南宁市528400 [2]同济大学地下建筑与工程系,上海市200092 [3]中交公路长大桥建设国家工程研究中心有限公司,北京市1100088 [4]土木工程防灾减灾全国重点实验室,上海市200092

出　　处：《公路》2024年第12期9-15,共7页Highway

基　　金：广西重点研发计划项目,项目编号桂科AB24010227。

摘　　要：沉渣效应是施工过程中泥浆、细粒土等沉积在基础底部,导致基础承载力下降和沉降量增加的重要因素。采用PLAXIS 3D有限元软件对苍容浔江特大桥桩墙组合锚碇进行数值模拟,分析不同沉渣厚度(0 cm、5 cm、10 cm、20 cm)对桩墙组合锚碇的内力和变形特性的影响。结果表明,随着沉渣厚度增加,桩墙组合锚碇的轴向力显著降低,剪力和弯矩显著增加,整体变形量增大。这表明沉渣厚度对桩墙组合锚碇的承载性能具有显著影响,需在工程设计和施工中充分考虑。研究结果为相关工程的设计和优化提供了重要参考。Sediment effect refers to the accumulation of slurry,fine-grained soil,and other materials at the foundation base during construction,leading to a decrease in foundation bearing capacity and an increase in settlement.In the paper,PLAXIS 3D finite element software is used to numerically simulate the pile-wall composite anchorage foundation of the Cangrong Xunjiang Bridge,the impact of different sediment thicknesses(0 cm,5 cm,10 cm,20 cm)on the internal force and deformation characteristics of the pile-wall composite anchor foundation are analyzed.The results show that as sediment thickness increases,the axial force of the pile-wall composite anchorage foundation significantly decreases,while shear force and bending moment significantly increase,and overall deformation increases.This indicates that sediment thickness has a significant impact on the bearing performance of the pile-wall composite anchorage foundation,which should be fully considered in design and construction.The research results provide an important reference for the design and optimization of related engineering projects.

关 键 词：桥梁工程 苍容浔江特大桥 桩墙组合锚碇 沉渣厚度 承载性能 数值模拟 有限元分析 

分 类 号：U443.24[建筑科学—桥梁与隧道工程]