Calculation Method of Underground Cavern Loosening Pressure Based on Limit Analysis Using Upper-Bound Theory and Its Engineering Application

Table 1

Physical and mechanical parameters of the rock mass of Jiangxi Road metro station.

Rock formation	Bulk weight	Modulus of deformation	Cohesion	Internal friction angle	Horizontal bed coefficient	Vertical bed coefficient	Poisson’s ratio
	(kN/m^3)	(GPa)	(MPa)	(o)	(MPa/m)	(MPa/m)
Strongly weathered granite	18.5	1.3	0.2	22	230	180	0.33
Moderately weathered granite	21.0	6.5	0.4	31	550	500	0.38