Studying Bump at Bridge Approach of Short Subgrade with Oblique Prestressed Concrete Overlaying Asphalt Layer

Table 5

Control criteria for differential settlement of short subgrade at different speeds when 8 m L ≤ 30 m.

Speed (km/h)				Maximum settlement value (cm)
60	0.2	0.49	0.69	5.5∼20.7
80	0.2	0.46	0.66	5.3∼19.8
100	0.2	0.39	0.59	4.7∼16.8
120	0.2	0.32	0.52	4.2∼15.6

 = the longitudinal slope difference of bridge pavement.  = the maximum allowable longitudinal slope difference of slab.  = the maximum allowable longitudinal slope difference of bridge pavement and slab.