CFG长短组合桩复合地基全过程沉降规律及预测研究

Study on whole process settlement regularity and prediction of CFG long-short-pile composite foundation

建筑工程施工过程中的载荷多为一级线性或近似一级线性加载,针对其地基沉降时间曲线的"S"型特征,文章重点研究了威布尔曲线与改进泊松曲线模型在CFG长短组合桩复合地基全过程沉降规律及预测中的应用,给出了求解模型参数的优化迭代方法,结合首尔园工程项目进行了应用,表明了两个模型对复合地基全过程沉降拟合均有很高的精度,可满足工程应用需要,改进泊松模型略好于威布尔模型。

As the load in the process of construction is mostly a linear or approximately linear loading level, and the settlement time curve has the characteristics of ＂S＂ type, the paper mainly studied the application of the WEIBULL curve and improved POISSON curve model in the settlement regularity and prediction of the whole process of CFG the long-short -pile composite foundation, offered the optimization iteration method for solving the model parameters. According to the application result in actual engineering project, the two models are accurate for the whole process of composite foundation settlement fitting, which can meet the needs of the engineering application, improved the POISSON model is slightly better than the WEIBULL model.