A Theoretical Calculation Method of Influence Radius of Settlement Based on the Slices Method in Tunnel Construction

Table 2

Formation parameters of the Heathrow Express and Green Park tunnels.

Name	r (m)	z0 (m)	γ (kN/m^3)	c (kPa)	ϕ (°)	R (m)	(m)
Heathrow Express tunnel [11]	4.25	19.0	19	12	28	26.8	26.2
Green Park tunnel [11]	2.07	29.4	19	175	—	34.1	34