Application Of The Improved Non-equidistant Grey Model In Settlement Prediction Of Foundation Ditch

With the rapid development of our economy,there are large number of deep foundation pit engineering in the modern city construction.Foundation pit monitoring is not in place may led to major accidents.Due to the complexity of deep foundation pit engineering,the accident is frequent,in order to guarantee the safety of foundation pit engineering,the foundation pit numerical monitoring must be doing in the process of construction.Due to the settlement of foundation pit monitoring generally can't be finished in a short time,and must be continuous in time,so the time effect of foundation pit should be considered when calculating settlement problem.So in the practical work,monitoring data of non-isometric mostly exist,so often used in practical engineering non-isometric GM(1,1)model for foundation settlement prediction.Aimed at the unreasonable problem of the selection of the initial value problem and the structure of the background value,first take the exponential function minimization,method to process the initial value,then based on the two kinds of new method of background value structure which means area of the interval method and integral method,puts forward the improved grey non-isometric GM(1,1)prediction model.Finally,combining with the China disabled persons rehabilitation talent education base project engineering settlement of foundation pit of the measured data,the two tectonic background value improvement of equal interval GM(1,1)prediction model,and compared with the traditional non equal interval GM(1,1)prediction model is compared,the results show that the improved grey non equal interval GM(1,1)prediction model prediction accuracy than the traditional non equal interval GM(1,1)prediction model is high precision.Verified in this paper,established by improved gray non-isometric GM(1,1)model in the applicability of the foundation settlement prediction.