多因素灰色G(1,N)模型及其在基坑位移预测中的应用

G(1,1)模型只利用单点已测数据预测该点的位移,而不管别的因素影响。而事实上该点位移和围护桩上其他点的位移及锚索拉力是耦合的。针对传统的单因素灰色模型在基坑预测中的不足之处,本文提出采用多因素的G(1,N)灰色模型对基坑位移进行预测研究。计算实例表明,该模型预测精度高,所需数据少,简单实用,值得在基坑预测中推广。

Multi-factored Grey G(1, N)model and its application in displacement forecast of foundation pit

G(1,1)model only by using a single point has surveying data predicted it in displacement,regardless of other influences.In fact,the point displacement and the displacement of other points on the pile and tension force of anchor cable are coupled.Due to the deficiencies of traditional single factor grey prediction model in the foundation pit forecast,the paper proposed the multi-factored grey G(1,N)model to predict the displacement of foundation pit.A calculation example showed that this model forecast precision is high and the required data is less,simple and practical,worthy to be used broadly in the displacement forecast of foundation pit.