5[1]Peck R B.Deep excavations and tunneling in soft ground[A].Proceedings of 7th International Conference of Soil Mechanics & Foundation Engineering[C].Mexico,1969.225~290.
7[3]O'Reilly,M P,New B M.Settlements above tunnels in the United Kingdom-their magnitude and prediction[A].Proceedings Tunneling 82,published by Institution of Mining and Metallurgy[C],London:[s.n.],1982.173~181.