基于PLAXIS的赤泥路基力学响应数值分析

Numerical Analysis of Mechanical Response of Red Mud Subgrade Based on PLAXIS

本文对山东某高速改扩建工程采用赤泥填筑路基道路结构进行数值分析,研究赤泥填筑路基及常规土路基路面结构的路表弯沉、沥青层底拉应变及土基顶压应变等力学响应指标的变化规律。结果表明:采用赤泥填筑路基的路面结构的承载能力和抗疲劳开裂能力更好,且采用赤泥填筑路基厚度范围越大,路面结构整体性能越强,可为赤泥填筑路基的设计参数和质量控制选定提供参考。

In this paper, numerical analysis is performed on the road structure of a red mud-filled subgrade in a reconstruction and expansion project of a high-speed highway in Shandong. The road surface de-flection of the red mud-filled subgrade and conventional soil subgrade pavement structure, the bottom strain of the asphalt layer, and the top pressure strain of the soil are studied on the change law of mechanical response index. The results show that the bearing capacity and anti-fatigue cracking ability of the pavement structure filled with red mud are better, and the larger the thick-ness range of the red mud filled roadbed is, the stronger the overall performance of the pavement structure is. Design parameters and quality control are selected for reference.