基于GM(1,1)预测模型的桩基工程研究

The research of pile foundation engineering based on GM(1,1) prediction model

根据某工程8根基桩的载荷试验实测资料,运用灰色系统理论,建立了预测基桩极限承载力和桩顶沉降的非等步长GM(1,1)模型,实现了对基桩Q-S曲线的拟合,利用有限的实测数据分析得到基桩极限承载力和桩顶沉降的预测值,论证了以灰色系统理论对基桩极限承载力和桩顶沉降进行预测的意义。结合工程实例,应用MATLAB语言程序进行分析,计算速度快,预测精度较高,表明了该方法在实际工程中具有较高的应用价值。

Based on grey system theory, GM（ 1,1） mode of unequal step length of the ultimate bearing capacity and pile block settlement of foundation piles was established according to measured date of eight foundation .piles＇ static load test. The imitation of Q-S curve was realized. The predictor value of the ultimate bearing capacity and pile block settlement of foundation a pile were analyzed by the limited measurement data and was modified by grey system theory. The results indicate that this method has great practical application value.