桥梁桩基础的钻孔灌注桩孔壁稳定性分析研究  

Research on the stability analysis of bored pile wall in bridge pile foundation

作　　者：石磊 王传军 窦创战 Shi Lei;Wang Chuanjun;Dou Chuangzhan(Zhejiang Communication Construction Group Co.,Ltd.,Hangzhou Zhejiang 310051,China)

机构地区：[1]浙江交工集团股份有限公司,浙江杭州310051

出　　处：《山西建筑》2025年第9期170-173,178,共5页Shanxi Architecture

摘　　要：针对桥梁钻孔灌注桩孔壁稳定性,结合铜仁市石阡县猫猫冲中桥,对桥址地质勘查及室内试验确定土体参数,运用三维有限元软件FLAC3D建模分析。研究发现,钻孔直径增大使孔壁横向位移和地表沉降加剧,如直径从1.0 m增至2.0 m时,位移与沉降显著增长;钻孔深度增加,孔壁下部位移增长明显且地表沉降随之上升;填土厚度增长也会导致孔壁失稳风险提升,横向位移与沉降相应增加。该研究成果可为类似桥梁工程钻孔灌注桩施工提供关键参数控制与施工决策依据,保障工程安全稳定。This paper focuses on the stability of the borehole walls of bridge bored piles,using a real case in Shiqian County,Tongren City as the foundation.After geological exploration and indoor testing of the bridge site,the soil parameters were determined,and the three-dimensional finite element software FLAC3D was used for modeling and analysis.Research has found that as the diameter of the borehole increases,the lateral displacement of the borehole wall and surface settlement intensify.For example,when the diameter ranges from 1.0 m to 2.0 m,displacement and settlement significantly increase;As the drilling depth increases,the displacement of the lower part of the borehole wall increases significantly and the surface settlement increases accordingly;The increase in filling thickness can also lead to an increased risk of instability of the borehole wall,resulting in a corresponding increase in lateral displacement and settlement.The research results can provide key parameter control and construction decisionmaking basis for the construction of bored piles in similar bridge engineering,ensuring the safety and stability of the project.

关 键 词：钻孔灌注桩 孔壁稳定性 横向位移 地表沉降 

分 类 号：TU997[建筑科学—市政工程] U443.15[建筑科学—桥梁与隧道工程]