钢塑格栅在高速公路拓宽工程中的应用研究

Study on Application of Steel-plastic Grille in Expressway Widening Project

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,为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方案及效果,结合京沪高速公路拓宽工程,对钢塑格栅在新老路基拼接中的应用进行研究,结果表明:钢塑格栅加筋拓宽路基可以改善新老路基拼接部位受力状况,根据工程实际情况在新老路基拼接处合理铺设钢塑格栅,可以有效抑制拓宽路基土体的竖向和水平位移,优化钢塑格栅的加筋效果。

The junction of the old and new roadbeds is the weak position in the reconstruction and expansion of highways. The fracture surface is most likely to occur along the junction surface. Therefore,the steel-plastic reinforcement technology is widely applied in the junction engineering of old and new roadbeds. In order to study the treatment scheme and effect of steel-plastic grille to reinforce and widen the roadbeds, combined with the Beijing-Shanghai Expressway Widening Project, the application of steel-plastic grille in the splicing of old and new roadbeds is studied. The results show that the steel-plastic grille to reinforce and widen the roadbeds can improve the stress state at the splicing of the old and new roadbeds. The steel-plastic grille is reasonably laid at the splicing of the old and new roadbeds according to the practical engineering situation, which can effectively restrict the vertical and horizontal displacements of the soil mass of widened roadbed and optimize the reinforcement effect of steel-plastic grille.