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提出一种开挖土方量小且施工快速的山地景区道路台阶式路基。通过将路基底面开挖成台阶状,减少山体土方开挖量。同时,采用泵送混凝土分段浇筑路基,达到快速施工的目的。建立台阶式路基的设计方法,包括路基强度、土基承载力、路基抗滑和抗倾覆稳定性及边坡稳定性等方面验算。采用数值计算方法对福州大腹山景区道路台阶式路基进行分析。结果表明,台阶式路基满足相关规范要求,能够应用于山地景区道路。为避免路基发生滑移,建议路基基底设置一定角度的倾斜角。同时,为避免路基发生倾覆,可在路基内侧台阶设置抗拉锚杆(索)。
Proposed a method of excavation earthwork is small and rapid construction of mountain scenic roadbed subgrade. By excavating the bottom of the roadbed into a stepped shape, reduce the amount of earth excavation of the mountain. At the same time, the use of pumping concrete sub-section pouring subgrade, to achieve the purpose of rapid construction. The design method of step-type subgrade is established, including the calculation of subgrade strength, bearing capacity of subgrade, anti-slip and overturning stability of subgrade and slope stability. The numerical method is used to analyze the stairs subgrade of Fuzhou Daphanshan scenic spot. The results show that the step-type embankment meets the requirements of relevant norms and can be applied to mountain scenic spots. In order to avoid the occurrence of slippery roadbed, it is recommended to set a certain angle of slope subgrade basement. At the same time, in order to avoid overturning subgrade, can be set in the subgrade step tensile anchor (cable).