基于有限元的山区高填方道路路基沉降分析

FEA-Based Settlement Analysis of High-Fill Subgrades in Mountainous Areas

摘要:

随着山区城镇化的推进，山区道路的建设一般存在深挖高填的情况，尤其在高填方路段，沉降控制是道路路基设计的重要内容之一。结合湖南蒙华铁路平江火车站连接线工程，选取3个典型断面采用有限元软件ANSYS对高填方路基填筑进行建模计算，并对不同填筑高度路基沉降的主要因素进行分析。通过对原状地基和填筑路基的弹性模量、材料密度等参数的调整计算，并结合工程实际，提出合理的路基处理措施，以减小高填方路基的沉降，为类似工程设计和分析提供一定的思路。

Abstract:

With the advancement of urbanization in mountainous areas, the construction of mountain roads generally involves the deep excavating and high filling. Particularly in high-fill road sections, the settlement control is a crucial aspect of road subgrade design. Combined with the Pingjiang Railway Station Connection Project of the Menghao Railway in Hunan, three typical cross-sections are selected to model and calculate the high-fill subgrade construction by the finite element software ANSYS. The main factors of subgrade settlement at different filling heights are analyzed. By adjusting and calculating the parameters such as the elastic modulus and material density of the in-situ foundation and the filled subgrade, and combined with the engineering practice, the reasonable subgrade treatment measures are proposed to reduce the settlement in high-fill subgrades, which provides some insights for the design and analysis of similar projects.