Shield Tunneling under Railway Station Throats in Soft Soil Areas: A Case Study

Table 2

Comparison of the proposed route schemes.

Parameter	(East) Liuzhou Road scheme	(West) Guilin Road scheme
Length (km)	3.46	2.91
Line shape	Poor, 2 curves with R = 350 m	Good, regular curve with R < 450 m
Interchange transferability	Good	Poor
Passenger appeal	Good	Poor
Impact of construction on road traffic	Acceptable	Extensive
Railway to be crossed	East throat of the Shanghai South Station	West throat of the Shanghai South Station
Buildings to be crossed	4	0
Other underground structures to be crossed	Liuzhou Road Interchange	Guilin Road Interchange, tunnel section of the Metro Line 1 and its diaphragm wall
Engineering risk	High	Medium