水泥混凝土路面路基永久变形预估

摘要

Using the model of evaluation for subgrade permanent deformation and layerwise strain summation method, in considering the clay, silt and sand, the permanent deformations of subgrade are calculated with the load action on edge of board, center of board, and angle of board. Calculation shows that, for certain pavement structure and traffic axle load, permanent deformation of the clay subgrade is the largest, and the sand subgrade is the minimum; for the same soil, subgrade permanent deformation is the largest or minimum when angle of board loaded or center of board loaded; when edge of board loaded, the board's size smaller, the subgrade permanent deformation greater; subgrade permanent deformation caused by angle of board loaded is the most adverse condition for the pavement s force status.%结合修正后的路基永久变形预估模型和应变分层总和法,在考虑粘土、粉土和砂土3种不同土质状态下,分别预估了荷载作用于板边、板中及板角时路基产生的永久变形.计算表明,对于一定的路面结构和交通轴载,粘土路基的永久变形量最大,粉土次之,砂土最小；对于同一种土质,板角受荷时路基的永久变形最大,板边受荷次之,板中受荷最小；当荷载作用在板边时,板的尺寸越小,路基的永久变形越大；板角受荷造成的路基永久变形对水泥路面的受力状况是最为不利的.