CFG桩复合地基现场检测与模拟分析研究

Field Detection and Simulation Analysis of CFG Pile Composite Foundation

本文以北京丰台区南苑乡南苑村某地块为研究背景,利用现场检测技术慢速维持荷载法分别对复合地基增强体的单桩以及单桩复合地基进行静载荷试验,对检测数据进行整理分析,得到本工程施做的CFG桩桩顶沉降量、桩Q-s曲线图及s-lgt曲线,并与数值模拟计算结果进行对比,结果表明:现场检测结果与数值计算结果基本上是一致的,判定该复合地基满足沉降要求。在模拟过程中发现适当增加桩体长度对复合地基承载力的提升具有一定的帮助,此结论可为类似工程提供参考。

Based on the background of CFG reinforcement in Nanyuan Village, Fengtai District, Beijing, this paper studies on field test pile test of CFG pile composite foundation by numerical simulation and field test. Combined with the pile foundation detection technology, the results of the test data in-dicate that the CFG piles of this project meet the requirements. And then compared with the nu-merical simulation, the results show that the field test is basically the same as the numerical cal-culation results. In the course of simulation, it is found that increasing the length of piles properly is helpful to improve the bearing capacity of composite foundation, which can provide reference for similar projects.