钻孔扩底灌注桩沉降量的灰色预测

Gray Prediction of the Settlement of Drilling Bottom-enlarged Grouting Piles

利用实测的钻孔扩底灌注桩静载试验数据,用灰色系统理论建立桩基沉降量的灰色GM( 1, 1 )预测模型,并用残差GM(1, 1)模型对原预测值进行修正。研究结果表明,建立的GM( 1, 1 )模型可有效预测桩基沉降量。应用实例中,用预测的桩基沉降量修正了其实测值,结果表明,钻孔扩底灌注桩具有比检测结果更优的承载性能。

Based on the data obtained from static loading test of drilling bottom-enlarged grouting piles, this paper has established a model GM (1,1) for predicting settlement of pile foundation by the use of gray theory, and used the modified residual error model GM (1,1) to modify the primary predictors. The results show that the model GM (1,1) can effectively predict the settlement amount of pile foundation. In the researched example project, the predictors of settlement of pile foundation has sued to modify measured ones, resulting in that the drilling bottom-enlarged grouting piles were of better load bearing behavior than the measured results.