灰色理论在快速法载荷试验数据处理中的应用

探讨了灰色理论方法在快速法载荷试验数据处理中的应用，并运用此理论对快速载荷试验各级荷载下的t-s曲线及总体的P-S曲线进行预测，以得到荷载作用下与慢速法一致的稳定沉降量。用VB语言编制了实用计算程序，通过对实例计算，得到的预测值与稳定沉降进行对比，证明了该法对于两种曲线的预测是可行的。同时评价了GM(1,1)以及等维灰数递补GM(1,1)两种模型对于远距离预测的精度。算例表明，对于P-S曲线的外推预测，最好只进行2～3级，外推级别较多时，精度不高，若应用于远距离预测，必须对模型作进一步改进。

Application of grey theory to data processing of fast load test

The application of grey theory to data processing of fast load test is discussed.According to the grey theory,the author attempts to predict both t-s and P-S curves of the test and obtain the similar settlement which traditionally gained by slow load test.A VB program has been worked out.The contrast between the predicted settlement of an engineering example and the real settlement shows that the prediction of two curves made by grey theory is feasible.The precisions of two kinds of GM(1,1) model used for long distance prediction are estimated;and a conclusion is drawn that the extrapolation of P-S curve more than two or three grades is not accurate enough.The model must be modified when it is used to do long-distance extrapolation.