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【简答题】
侧沟的深度不得小于0.6m(干旱少雨地区或硬质岩石路堑可减少至0.4m)，底宽不得小于0.4m，土质边坡为(1:1)～(1:1.5)，沟底纵坡不得小于1‰，困难地段不得小于1‰。横向盲沟应设于道床陷槽以下。()
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