灰色系统理论预测单桩极限承载力

The Prediction of Pile Ultimate Bearing Capacity by Grey Theory

单桩极限承载力是桩基工程中很重要的一个设计参数。由于灰色系统理论在预测发展趋势时所需的已知信息较少,而且结果准确,因此可利用其优点,并根据已有的残缺不全的单桩静载荷试验资料来预测单桩极限承载力。实例预测与理论分析结果表明,灰色预测理论的预测结果和设计计算结果相符合,且误差值很小。

Grey theory,comparing with other predicting techniques,need less existing information with higher accuracy in prediction of developing trend, and has been used increasingly in all fields including the pile foundation engineering. The pile ultimate bearing capacity is an important coefficient in pile design,therefore,grey theory is often applied to predict it on the basis of the existing incomplete data collected from the pile load test. As result of prediction and the theory analysis of the case histories shown,the pile ultimate bearing capacity predicted by grey theory has a good agreement with the designed value,and the difference between them is small enough to be overlooked.