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利用路基填筑完成后相对较长静置期内的实测沉降值及轨道结构层施工完成后的较短时间内的有限次沉降数据,提出一种实用的铁路客运专线路基工后沉降预测方法。首先,利用较长静置期中的路基沉降实测数据进行曲线拟合并判定其拟合参数是否满足要求,其次,在满足预测曲线的参数条件后,根据结构层的荷载情况及施工完成后有限次实测沉降值,确定与路基土体固结性质有关的结构层施工完成后的沉降发展曲线拟合方程参数,并给出相应的工后沉降计算式;最后,通过工程实例对所建议的预测评估方法进行验证与分析。
By using the measured settlement value during relatively long standing period and the finite subsidence data within a relatively short time after the construction of track structure is completed, a practical post-construction settlement prediction method for subgrade of railway passenger dedicated line is proposed. First, the curve fitting is carried out by using measured data of subgrade settlement during longer standing period to determine whether the fitting parameters meet the requirements. Secondly, after the parameters of the prediction curve are satisfied, according to the load of the structural layer and the limited The measured settlement values are then used to determine the parameters of the settlement development curve fitting structure after the construction of the structural layer related to the consolidation of the subgrade soil. Corresponding post-construction settlement formulas are given. Finally, the proposed prediction and evaluation Method to verify and analyze.