灰色理论在深基坑施工变形预测中的应用研究

Research of the Application of Grey Theory in the Deep Foundation Pit Construction Deformation Prediction

由于深基坑工程数量激增,施工造成的坍塌等事故屡屡发生,所以深基坑施工中的变形预测非常重要。采用灰色理论建立适当的模型,并将该模型应用到实际工程中,得出以下的结论:(1)灰色GM(1,1)模型、等步距及非等步距GM(1,1)模型的建模条件;(2)将灰色理论应用到工程实例中,所取得的结果较为理想,可以进一步在类似工程中推广使用;(3)由于等步距灰色模型与非等距模型相比误差小很多,因而较易推广于实际工程中,同时,在实测值和预测变形精度上,非等步距灰色模型均较滞后,应当谨慎应用。

Due to the increasing of the deep foundation pit engineering, the collapse of the construction, such as accidents frequently occur, so the deformation of deep foundation pit construction is very important. Grey theory is adopted to establish the proper model,and applies the model to the actual engineering, the following conclusions：（1） grey GM（1, 1） model、equal step distance and unequal step distance conditions on the modeling of GM（1, 1） model;（2） the grey theory is applied to the engineering example, and the actual results obtained, the most ideal can be further used in similar projects;（3） with equal step distance model much less error than the unequal step distance model, thus promoting more easily in practical engineering, at the same time, on the measured values and the forecast precision of deformation, unequal step distance grey model is relatively lag, application should be cautious.