后注浆技术对灌注桩承载力的影响分析  

Analysis of the Influence of Post Grouting Technology on the Bearing Capacity of Cast-in-place Piles

作　　者：王小威 WANG Xiao-wei(Shenzhen Housing Safety and Engineering Quality Testing and Appraisal Center,Shenzhen 518031)

机构地区：[1]深圳市房屋安全和工程质量检测鉴定中心,深圳518031

出　　处：《广州建筑》2025年第4期1-5,共5页GUANGZHOU ARCHITECTURE

摘　　要：为研究后注浆技术对灌注桩抗拔性能的加固效果,本文开展了相关试验研究,旨在通过后注浆技术提升灌注桩的承载能力,优化其抗拔性能,为工程实践提供科学依据。本文采用静载试验方法,对2根钻孔灌注桩注浆前后承载特性进行对比分析,并对3根注浆处理后的灌注桩承载特性进行详细研究,着重分析注浆前后灌注桩承载性能的差异。根据试验数据对比,抗拔桩注浆后的承载力相较于注浆前提升了35.15%-148.54%;最大上拔量相较于注浆前降低了64.74%-65.57%。试验结果表明,后注浆技术能够有效加固桩侧和桩端的岩土体,进而提高桩侧摩阻力和桩端嵌固作用,显著减小桩身沉降。后注浆技术对灌注桩抗拔性能具有显著的加固效果,能够大幅提升桩的承载能力并有效减小桩身变形。该技术通过加固桩侧和桩端岩土体,增强了桩侧摩阻力和桩端嵌固作用,为灌注桩的抗拔设计和施工提供了可靠的技术支持。In order to study the reinforcement effect of post grouting technology on the pull-out performance of cast-in-place piles,this paper conducted relevant experimental research,aiming to improve the bearing capacity of cast-in-place piles through post grouting technology,optimize their pull-out performance,and provide scientific basis for engineering practice.This article uses the static load test method to compare and analyze the bearing characteristics of two drilled cast-in-place piles before and after grouting,and conducts a detailed study on the bearing characteristics of three grouted cast-in-place piles,with a focus on analyzing the differences in bearing performance before and after grouting.According to the comparison of experimental data,it was found that the bearing capacity of the anti pull pile after grouting increased by 35.15%-148.54%compared to before grouting;The maximum uplift amount has decreased by 64.74%-65.57%compared to before grouting.The experimental results show that post grouting technology can effectively reinforce the rock and soil mass on the pile side and pile end,thereby improving the pile side friction resistance and pile end embedding effect,and significantly reducing the settlement of the pile body.The post grouting technology has a significant reinforcement effect on the pull-out performance of cast-in-place piles,which can greatly improve the bearing capacity of piles and effectively reduce pile deformation.This technology strengthens the rock and soil mass on the pile side and pile end,enhances the pile side frictional resistance and pile end embedding effect,and provides reliable technical support for the anti pull design and construction of cast-in-place piles.

关 键 词：后注浆技术 抗拔试验 泥皮效应 桩侧摩阻力 注浆加固 

分 类 号：TU375[建筑科学—结构工程]