嵌入砂或砂砾层中的桩底灌浆桩竖向承载性能研究  

THE BEHAVIOR OF GROUTING PILE INSERTED INTO SAND OR GRAVEL LAYER UNDER AXIAL LOAD

作　　者：黄敏[1] 张克绪[1] 张尔齐[1] 

机构地区：[1]哈尔滨工业大学

出　　处：《土木工程学报》2002年第3期77-81,98,共6页China Civil Engineering Journal

摘　　要：考虑嵌入砂或砂砾层中的桩底灌浆桩竖向承载力提高的机制 ,提出了一个桩底灌浆桩竖向承载性能的模拟分析方法。该方法包括桩底灌浆分析 ,浆液渗透力在桩端周围土体中引起的应力分析 ,及在竖向荷载作用下桩的性能分析三个步骤。采用本文提出的模拟分析方法进行了影响参数的研究 ,并对现场压桩实例进行了对比分析。The behavior of grouting pile inserted into sand or gravel layer under axial load is studied in the paper.A method used to analyze the behavior of grouting piles at bottom under axial load is proposed.It includes the analysis of grouting at pile bottom,the stress in soil mass around plie bottom induced by grouting,and the behavior of grouting piles under axial load.The influence factors on the behavior of grouting piles are also studied using the proposed method.The practice test data are compared with that of the computing ones.At last,some useful conclusions are obtained.

关 键 词：桩底灌浆 砂砾石层 水泥砂砾石 静荷载试验 非线性模型 有限元法 

分 类 号：TU473.11[建筑科学—结构工程]