Deformation Responses and Mechanical Mechanism of Existing Tunnel due to New Building Construction

Table 1

Soil properties.

Type of soil	Thickness (m)	Unit weight (kN/m^3)	Compression modulus (MPa)	Cohesion (kPa)	Internal friction angle (°)	Poisson ratio
Miscellaneous fill	2.0	18.5	7.0	10	15.0	0.36
Clayey silt I	5.2	21.6	7.7	21	20.7	0.25
Silty clay	12.2	20.7	9.7	28.7	20.6	0.26
Clayey silt II	2.8	20.6	18.7	30	23.0	0.25
Medium sand	3.2	21.0	30.0	0	30.0	0.27
Pebbles	4.5	22.0	55.0	0	35.0	0.23