The Construction Countermeasures of Shallow-Buried Small Spacing Tunnel Undercrossing Cultural Relic Buildings: A Case Study

Table 3

Support parameter value.

Name	Material	Elastic modulus (GPa)	Poisson’s ratio	Volumetric weight (kN/m^3)	Cross section	Geometry (m)
Temporary support	C25 sprayed concrete	27.6	0.25	25	Rectangle	H	0.20
						B	1.0
Initial support	C25 sprayed concrete	28.3	0.25	25	Rectangle	H	0.26
						B	1.0
Secondary lining (including inverted arch)	Reinforced concrete	31	0.2	25	Rectangle	H	0.60
						B	1.0