A New Design of Bridge-Subgrade Transition Sections Applied in Beijing-Shanghai High-Speed Railway

Table 2

Physical and mechanical characteristic parameters of the materials.

Position	Material type	Constitutive model	Deformation modulus (MPa)	Poisson ratio	Internal friction angle (°)	Cohesion (kPa)	Density (g/cm^3)
Bedding surface layer	Graded gravel	M-C	120	0.33	27	70	1.95
Bedding bottom layer	Sand stratum mixed with 28% of broken stones	M-C	80	0.35	20	55	1.90
Subgrade		M-C	36.5	0.3	10	30	2.1
Improved Sections	Graded gravel (+5% of cement)	M-C	449	0.21	/	/	2.4
	Roller-compacted concrete	M-C	307.1	0.26	/	/	2.3
	Abnormal graded gravel	M-C	652.3	0.19	/	/	2.45
Track/friction slab	Concrete	Linear elastic	2.0E + 04	0.15	/	/	2.5
Supporting layer	Concrete	Linear elastic	2.0E + 04	0.15	/	/	2.5
Abutment	Concrete	Linear elastic	2.0E + 04	0.15	/	/	2.5