对称帮宽填筑加筋路基变形特性有限元数值模拟研究

Numerical Simulation Study on Deformation Characteristics of Reinforced Subgrade with Symmetrical Width Filling

摘要: 本文以既有中川城际铁路路基帮宽增建中兰铁路路基工程为依托，运用ABAQUS有限元软件，对既有–帮宽土工格栅加筋路基的应用形式进行了有限元分析。研究了在帮宽填筑施工过程、施加新线列车静荷载两个阶段，不同加筋方式以及筋材模量对既有–帮宽路基变形特性的影响。分析发现，将土工格栅布置于基床以下部位时，对帮宽路基变形具有良好的控制效果；土工格栅筋材模量选取2 GPa至4 GPa之间为宜。

Abstract: Based on the existing Zhongchuan intercity Railway roadbed width extension project, this paper uses ABAQUS to carry out finite element analysis on the application form of the existing-width geogrids reinforced roadbed. The influence of different reinforcement methods and reinforcement modulus on the deformation characteristics of the existing-width subgrade is studied in the construction process of width filling and the static load of the new line train. It is found that when the geogrid is placed below the foundation bed, it has a good control effect on the deformation of the wide subgrade. The modulus of geogrid bars should be between 2 GPa and 4 GPa.