Abstract:As a trunk fast channel in the country or region, expressway is a main transportation corridor of transferring the regional materials and personnel. It is vital to ensure the smooth traffic. The treatment of road disaster usually requires high speed and efficiency. The permanent and temporary combination can minimize the impact on the traffic. After the subgrade collapse in Shiyan - Tianshui National Expressway Gansu Section Hui County (Dashibei) - Tianshui Highway Hengling Mountain Section, in order to quickly repair the collapsed road sections and ensure the smooth traffic, the miniature steel pipe pile mostly used in the temporary reinforcement projects is improved and combined with the permanent support engineering. The dual effect of temporary traffic protection and permanent traffic smoothness is achieved.
