1John M, Strappler G. Design and installation of tube umbrellas in soft ground tunnelling[A]. Teuscher P,Colombo A. Progress in tunnelling after 2000[C].Bologna,2001 253-260.
2HSE. Safety of new austrian tunneling method (NATM) tunnels-areview of sprayed concrete lined tunnels with particular reference to London Clay[M].Health and Safety Executive. UK :HSE Books, 1996.
3Mair R J, Taylor R N, Bracegirdle A. Subsurface settlement profiles above tunnels in clays [J].Geotechnique, 1993,43 (2): 315-320.
4Yamaguchi I, Yamazaki I, Kiritani Y. Study of ground-tunnel interactions of four shield tunnels driven in close proximity, in relation to design and construction of parallel shield tunnel [J]. Tunnelling and Underground Space Technology 1998 (13): 289-304.
5Chou W I, Antonio B. Predictions of ground deformations in shallow tunnels in clay[J]. Tunnelling and Underground Space Technology, 2002(17):3-19.
6[1]Evert Hoek. BIG TUNNELS IN BAD ROCK[J] . GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING ,2001,9
