后注浆技术在某商业中心试桩工程中的应用研究  

Research on the Application of Post-grouting Technology in the Test Pile Engineering of a Commercial Center

作　　者：张建书 马书杰 文石命 ZHANG Jianshu;MA Shujie;WEN Shiming(Zhengzhou Construction Engineering Quality Testing Co.,Ltd.,Zhengzhou He’nan 450052,China;He’nan Provincial Capital Construction Science Experimental Research Institute Co.,Ltd.,Zhengzhou He’nan 450016,China)

机构地区：[1]郑州市建设工程质量检测有限公司,河南郑州450052 [2]河南省基本建设科学实验研究院有限公司,河南郑州450016

出　　处：《工程质量》2020年第3期15-18,23,共5页Construction Quality

摘　　要：通过对某工程6根钻孔灌注桩试桩(未注浆3根、复合后注浆3根)两种桩型的静载试验结果比对,依据单桩竖向抗压极限承载力判定标准,结合实测Q-s曲线和s-lgt曲线特征进行综合分析,归纳总结出复合后注浆比未注浆的基桩承载力提高幅度明显,为设计单位进行基桩设计时参数优化、桩型选择等提供了依据,对降低基桩和建筑物的沉降控制起着至关重要的作用,同时为工程施工提供了技术保证。The static load test results of two pile types of 6 bored cast-in-place pile test piles(3 ungrouted and 3 grouting after composite)were compared in accordance with a single pile vertical compression ultimate bearing capacity determination standard based on the comprehensive analysis of the measured Q-s curve and s-lgt curve characteristics,it is concluded that the bearing capacity of the pile after grouting is significantly higher than that of the ungrouted pile,and the parameters optimization and pile type selection of the foundation pile design for the design unit are summarized.It provides a basis,plays a vital role in reducing the settlement control of foundation piles and buildings,and provides technical guarantee for engineering construction.

关 键 词：后注浆 静载试验 极限承载力 

分 类 号：TU473[建筑科学—结构工程]