天津某工程桩底后注浆钻孔灌注桩质量检测分析

Detection and Analysis on Quality of Post-grouting Bored Pile at Pile Bottom in an Engineering in Tianjin

该文介绍了钻孔灌注桩桩底后注浆技术的加固原理,通过在桩底后注浆钻孔灌注桩旁进行标准贯入试验和选取原状土试样进行物理力学试验及矿物成分分析,将试验结果与原详勘报告进行对比分析,研究注浆前后土层的变化情况,判定注浆效果,为桩底后注浆工程施工质量检测提供技术支撑。

This paper introduces the reinforcing principle of post-grouting technology at the bottom of bored piles.Through the standard penetration test carried out near the post grouting bored pile at pile bottom and selecting the undisturbed soil samples for physical and mechanical tests and mineral composition analysis,the test results are compared with the original detailed survey report.The change of strata before and after grouting is studied,the grouting effect is determined,it provides technical support for the quality inspection of post-grouting construction at pile bottom.