后注浆钻孔灌注桩竖向承载能力研究  

Study on Vertical Load-Carrying Capacity of Post-Grouting Bored Piles

作　　者：郭昱 祁文静 GUO Yu;QI Wenjing(Jinan Sijian Construction Group Co.,Ltd.,Jinan 250000,Shandong,China)

机构地区：[1]济南四建(集团)有限责任公司,山东济南250000

出　　处：《工程与试验》2024年第3期50-53,92,共5页Engineering and Test

摘　　要：假设桩侧摩擦力与桩尖阻力和沉降之间的关系是理想的弹塑性,采用荷载转移法分析实际工程中钻孔灌注桩的承载特性,并将结果与静载试验结果进行比较,以证明分析方法及其参数的可靠性。基于此,对钻孔灌注桩进行了加固处理。结果表明,桩尖灌浆主要改善桩尖阻力,对桩侧摩擦力几乎没有影响,而桩侧灌浆显著改善了桩尖阻力和桩侧摩擦力。使用桩尖灌浆、桩侧灌浆,桩的极限承载能力分别增加了19%和49%。The relationship between the pile side friction resistance and pile tip resistance and the settlement is assumed to be ideal elastic-plastic,and the load transfer method is used to analyze the load-carrying characteristics of bored pile in practical projects,and the results are compared with the static load test results to prove the reliability of the analysis method and its parameters.Based on this,the bored pile is reinforced.The results show that the pile tip grouting mainly improves the pile tip resistance and has little effect on the pile side friction.The pile side grouting improves pile tip resistance and pile side friction more significantly.The ultimate load-carrying capacity of the pile is increased by 19%and 49%respectively after the use of pile tip grouting and pile side grouting.

关 键 词：荷载传递 注浆 钻孔桩 承载能力 

分 类 号：TU473.1[建筑科学—结构工程]