城市深基坑工程沉降监测实例与MATLAB模拟分析

吉林建筑大学 测绘与勘查工程学院,长春 130118

深基坑工程,函数拟合,残差分析,形变规律

Case study of settlement monitoring and MATLAB simulation analysis of urban deep foundation pit engineering
LI Cheng-hang,ZHANG Wen-chun*

School of Surveying and mapping and exploration engineering,Jilin Jianzhu University,Changchun 130118

deep foundation pit engineering,function fitting,residual analysis,deformation law

备注

为了分析城市深基坑工程在施工过程中的形变规律,依托吉林省第二人民医院深基坑监测工程为背景,对基坑第一层冠梁、第二层腰梁、第三层腰梁进行水平、竖向位移监测,同时为验证冠梁、腰梁水平位移变化进行深层土体水平位移监测.通过MATLAB对基坑围护结构的累计水平、竖向位移进行拟合预测,将预测值与实测值进行残差分析,结果表明:Sigmoid函数模型符合基坑水平位移的变化趋势,对数函数模型可以对基坑竖向沉降量进行准确拟合,可以对基坑未来长期形变量进行准确预测,为同类型的深基坑工程分析形变规律提供实例参考.

In order to analyze the deformation law of urban deep foundation pit engineering in the construction process,relying on the deep foundation pit monitoring project of the second people's Hospital of Jilin Province as the background,the horizontal and vertical displacement of the first layer crown beam,the second layer waist beam and the third layer waist beam are monitored,and the horizontal displacement of deep soil is monitored to verify the horizontal displacement change of crown beam and waist beam.The horizontal and vertical displacements of the retaining structure of the foundation pit are predicted by MATLAB,and the residual error between the predicted value and the measured value is analyzed.The results show that the sigmoid function model conforms to the change trend of the horizontal displacement of the foundation pit,and the logarithmic function model can accurately fit the vertical settlement of the foundation pit and accurately predict the long-term deformation variables of the foundation pit in the future.It is a deep foundation pit of the same type Engineering analysis of deformation law provides examples for reference.