高填方路基沉降变形影响因素模拟分析

Simulation Analysis of Influencing Factors of Settlement and Deformation of High Fill Subgrade

为分析各类因素对高填方路基沉降的影响,建立模型模拟分析在不同因素作用下路基沉降的变化规律。运用ANSYS软件建立模型进行模拟分析,对不同填筑高度、边坡坡度、压实度和填料的路基沉降变形进行模拟计算,并结合现场实测结果进行对比分析确定可靠性。模拟计算结果表明:路基沉降随填方高度呈现线性增加,随路基压实度的提高而线性下降,随填料容重的提高不断下降,下降幅度随路基坡度变缓而减小。结合现场监测数据进行对比分析,得出模拟计算值相对较高,偏差最大值为5.95%,实测值与模拟计算值比较接近,说明模拟计算准确率较高,可用于高填方路基沉降变形分析。

In order to analyze the influence of various factors on the settlement of high fill subgrade,the model is established to simulate and analyze the variation law of subgrade settlement under the action of different factors.ANSYS software is used to establish the model for simulation analysis,and the subgrade settlement and deformation of different filling heights,slope gradients,compactness and fillers are simulated and calculated,and the reliability is determined by comparing and analyzing the measured results of field.The simulation calculation results show that:the subgrade settlement increases linearly with the filling height,decreases linearly with the improvement of the subgrade compactness,decreases continuously with the increase of the volume weight of the filler,and decreases with the decrease of the subgrade slope.Based on the comparative analysis of the field monitoring data,the simulation calculation value is relatively high,with the maximum deviation of 5.95%.The measured value is close to the simulation calculation value,indicating that the simulation calculation accuracy is high and can be used for the settlement and deformation analysis of high fill subgrade.