Asaokao法在地基沉降预测应用中的不足与改进

Shortcomings of Asaoka method in the forecast of foundation settlement and its improvement

现有地基沉降预测模型多数是几何统计模型,参数意义不够明确,而Asaoka方程具有明确的理论基础,在工程中得到了广泛应用。针对实际应用中,Asaoka方程存在的两点不足:递推公式未考虑误差传递效应和对于等时间间隔沉降观测数据无法直接应用,对其进行了详细的分析,同时提出了相应的改进方法,建立了非等间隔Asaoka方法。将两种改进方法应用于实际工程中,结果显示两种改进方法是有效的。

The most existing prediction models in the forecast of foundation settlement are statistical models,the parameters of which do not have explicit meanings.The theoretical basis of Asaoka method is explicit,which is Mikasa consolidation equation for 1-d consolidation problem.For this reason,Asaoka method is applied in the engineering practice widely.But there are two shortcomings of Asaoka method in practical applications.One shortcoming is that the error transfer effect is not concerned in the recursive formula.And the other one is that Asaoka method cannot directly applied in forecasting of equal-interval settlement.Therefore,detailed analysis of the two shortcomings is made and improved methods are put forward in this paper.Finally,for two case studies,test results verify the validity of the improvement of Asaoka method.