桩侧后注浆加固在桥梁既有桩基中的应用  

Application of Pile Side Post-grouting Reinforcement in Existing Pile Foundations of Bridges

作　　者：相斌辉[1,2] 刘颖 林伟哲[1] Xiang Binhui;Liu Ying;Lin Weizhe(School of Civil and Architectural Engineering,Nanchang Institute of Technology,Nanchang,Jiangxi 330099;Jiangxi Zhengde Engineering Testing Co.Ltd.,Nanchang,Jiangxi 330000)

机构地区：[1]南昌工程学院土木与建筑工程学院,江西南昌330099 [2]江西正德工程检测有限公司,江西南昌330000

出　　处：《江西建材》2024年第12期398-401,共4页

摘　　要：因桥梁扩建工程引起原地基土层扰动,发生地基沉降,容易造成原桥梁结构破坏。文中针对这种工程场景,采用桩侧后注浆技术加固扰动地层,同时在桥梁扩建期间进行自动化位移监测,分析后注浆对扰动土层性能的影响;利用有限元模拟,分析这种加固工法效果,并结合实际沉降数据做出加固工法的综合评价。根据实际监测数据和有限元分析模拟数据发现,桩侧后注浆技术对既有桩因地层扰动沉降的加固处理效果良好,应用前景广阔。s:Due to the expansion project of the bridge,the original foundation soil layer is disturbed,resulting in foundation settlement,which can easily cause damage to the original bridge structure.In response to this engineering scenario,the post grouting technology on the pile side is adopted to reinforce the disturbed soil layer,and automatic displacement monitoring is carried out during the bridge expansion period to analyze the impact of post grouting on the performance of the disturbed soil layer;Using finite element simulation,analyze the effectiveness of this reinforcement method and make a comprehensive evaluation of the reinforcement method based on actual settlement data.According to actual monitoring data and finite element analysis simulation data,it is found that the post grouting technology on the pile side has a good reinforcement effect on the settlement of existing piles due to geological disturbance,and has broad application prospects.

关 键 词：既有桩加固 后注浆 沉降监测 桩侧摩阻力 有限元分析 

分 类 号：U455.43[建筑科学—桥梁与隧道工程] U445.71[交通运输工程—道路与铁道工程]