灰色系统在预测单桩极限承载力中的应用

单桩极限承载力是桩基设计中的一个重要参数．由于桩的极限承载力主要受到桩的长度、截面几何形状、截面尺寸、桩周及桩端土特性、施工方法及施工质量等许多因素的影响，但这些因素往往又是不确定的，所以可以认为这是一个灰色系统，采用灰色系统的理论加以研究．本文采用灰色系统GM(1，1)模型预测单桩极限承载力，并采用灰色关联度的方法进行修正．通过一实例计算，表明取得了较好的效果．

The Application of Gray System in Predicting Ultimate Bearing Resistance of Individual Pile

The ultimate bearing resistance of individual pile is an important parameter in pile foundation (design.)It is mainly affected by pile length,pile section geometric shape,size of pile section and the character of soil.Due to the uncertainty of these affecting factors,we can consider it's a gray system,and use this theory to study ultimate bearing resistance of individual pile.We use GM(1,1) model to analyse ultimate bearing in this paper,and use gray degree of association method to amend the error.Through an example we testified its good effect.