Analysis on Deformation and Stress Characteristics of a Multibraced Pit-in-Pit Excavation in a Subway Transfer Station

Table 1

Soil layer properties within the site.

Soil name	Unit weight of soil (kN/m^3)	Effective cohesion (kPa)	Effective friction angle (°)	In situ lateral earth pressure coefficient	Compressible modulus (MPa)
Fill	18.8	10	8	0.65	8
Medium clay	19.5	55	14	0.39	12
Stiff clay	19.9	36	16	0.38	13
Fully weathered sandy mudstone	19.0	35	18	0.38
Strongly weathered sandy mudstone	21.3	45	20	0.32	27.86
Moderately weathered sandy mudstone	21.7	50	25		33.64