Condition Monitoring and Quantitative Evaluation of Railway Bridge Substructures Using Vehicle-Induced Vibration Responses by Sparse Measurement

Table 7

Results of the investigation of the in-situ geological environment.

Pier no.	Upper interface (m)	Lower interface (m)	Soil categories	m and (MPa/m^2)
494#	0	10.700	Fine sand, silty clay	10
	10.700	21.063	Medium sand, gravel	55
	21.063	Pile-bottom	Mudstone, sandstone interbedded	100