钢塑格栅在高速公路拓宽工程中的应用研究

摘要:

新老路基的拼接处是改扩建公路的薄弱部位，最容易沿着结合面出现破裂面，因此钢塑格栅加筋技术在新老路基拼接工程中应用广泛。为研究钢塑格栅加筋拓宽路基的处治效果，本文结合京沪高速公路改扩建工程，对钢塑格栅在新老路基拼接工程中的应用进行研究，结果表明：钢塑格栅加筋拓宽路基可以改善新老路基拼接处受力状况，根据工程实际情况在新老路基拼接处合理铺设钢塑格栅，能够有效限制拓宽路基土体的竖向和水平位移，增强新老路基拼接的整体性。

Abstract:

Steel-plastic geogrid is widely used to reinforce the subgrade soil in expressway reconstruction and expansion engineering, which is likely to crack along the interface of the new and old subgrade. In order to investigate the effect of steel-plastic geogrid in jointing the new and old subgrade, the widened expressway from Beijing to Shanghai was chosen as an example to analysis. The analysis results indicated that the application of geogrid in expressway widening can improve the stress condition of the new and old subgrade. Using steel-plastic geogrid based on the engineering properties can effectively limit the vertical and horizontal displacement of subgrade widening and enhance the overall performance of expressway reconstruction and expansion engineering.