Influences of Urban Viaduct Pier Caps on Uneven Settlement of Roadbed

Table 4

Classification of settlement fall.

Grade of evaluation	Slight	Low	Medium	High
Allowed slope varying rate (%)	<0.23	0.23–0.37	0.37–0.58	>0.58
Allowed transverse settlement fall (mm)	<30	30–50	50–70	>70
Allowed longitudinal settlement fall (mm)	<50	50–80	80–120	>120