分级加载条件下沉降预测方法

首先,从固结理论单级线性荷载下的沉降计算公式,推出了关于沉降的3种线性关系。利用其中任何一种线性关系,根据前期实测沉降数据,可方便地得到沉降计算公式中的参数。其次,利用叠加原理将单级荷载下的沉降计算公式推广到分级加载情况下,并给出了分级加载情况下参数推算的方法。沉降计算公式中的参数确定后,计算公式可用于推算后期沉降。最后,用工程实例说明了该方法推算后期沉降的可行性和有效性。

Prediction method of settlement under multi-stage loading

Based on the consolidation theory with single-stage loading, three kinds of linear relationship about settlement are built from the settlement evaluation formula. According to any kind of these relationship and observed settlement data, the parameters of settlement evaluation formula can be decided easily. Secondly, the method is generalized to the case of multi-stage loading, and the settlement parameters in each stage loading are calculated like as in the single-stage loading. After the parameters in settlement evaluation formula decided, the formula can be used to predict the posterior settlement. Lastly, a case is used to illustrate the method's feasibility and validity in predicting the posterior settlement.