灌注桩后注浆单桩竖向极限承载力研究  

Study on Vertical Ultimate Bearing Capacity of Post-grouting Pile

作　　者：陈亮 何德刚 赵柔君 郑林 Chen Liang;He Degang;Zhao Roujun;Zheng Lin(State Power Investment Group Chongqing Hechuan Power Generation Co.Ltd.,Chongqing 401536)

机构地区：[1]国家电投集团重庆合川发电有限公司,重庆401536

出　　处：《江西建材》2024年第12期323-325,共3页

摘　　要：为研究后注浆灌注桩单桩竖向承载力的性能和影响因素,文中选用3根处于不同持力层的灌注桩单桩进行竖向静载试验和内力检测分析;对试验数据进行分析,研究不同持力层对灌注桩单桩前后注浆极限承载力的影响。结果表明,Z1桩端承载力提高121%,Z2桩提高90%;Z3桩仅提高6%;不同的持力层对单桩承载力影响不同,后注浆单桩承载力较高。同时,对处在不同持力层的桩进行桩侧摩阻力比较分析,中风化桩端土层对桩侧摩阻力加强效果最显著。In order to study the performance and influencing factors of vertical bearing capacity of post-grouting cast-in-place piles,3 cast-in-place piles in different bearing layers were selected for vertical static load test and internal force detection analysis.Based on the analysis of test data,the influence of different bearing layers on the ultimate bearing capacity of single cast-in-place pile is studied.The results show that the bearing capacity of Z1 pile is increased by 121%and Z2 pile by 90%.Z3 pile is only 6%higher;Different bearing layers have different influences on the bearing capacity of single pile,and post-grouting single pile has higher bearing capacity.At the same time,through the comparative analysis of pile side friction resistance in different bearing layers,the end soil layer of moderately weathered pile has the most significant effect on the side friction resistance.

关 键 词：极限承载力 静载试验 灌注桩 后注浆 

分 类 号：TU47[建筑科学—结构工程]