多元回归模型在基坑坡顶水平位移分析的应用

Horizontal Displacement Analysis of Pile Top at Foundation Pit Using Multivariate Linear Regression Method

运用拓扑康GTS-332N全站仪建立坐标系统,对大连软件园基坑北侧JKA段进行了桩顶水平位移监测。将影响该基坑坡顶水平位移的主要因素确定为基坑使用时间、开挖深度作为自变量对桩顶水平位移进行了多元回归分析,得出了多元回归方程,通过回归方程的F检验和回归系数t检验表明基坑使用时间和开挖深度对桩顶水平位移的影响是显著的。回归预测方程与实测结果对比表明残差在-0. 45～0. 48之间,具有很好的拟合性,为深基坑桩锚支护安全施工提供了可靠的理论基础。

Topcon GTS-332N total station is adopted to build user coordinate system and horizontal displacement of pile top has been monitored at the north part JKA of Dalian Software Park foundation pit.Using time and excavation depth are determined as the main influencing factors and used as the independent variable,to conduct multiple regression analysis on the horizontal displacement of pile top.The multiple regression equation of horizontal displ acement is built up.F-test method checking of the regression equation and t-test method checking of regression coefficient show that using time and excavation depth are extremely significant for horizontal displacement of pile top.Comparisons of regression prediction equation and monitoring results show that residual error is within-0.45~0.48,with fine fitness,which can provide reliable theoretical basis for safety construction of anchor support for deep foundation pit pile.