（1 Xiamen Road and Bridge Construction and Investment Co., Xiamen, ）(2Key lab. of Rock and Soil Mechanics, Institute of Rock and Soil Mechanics, The Chinese Academy of Sciences, Wuhan 430071）
Abstract：From the first subsea tunnel-Kanmon tunnel was built in 1936 in Japan, there have nearly one hundred subsea tunnel been constructed. Under special environment and geological conditions, subsea tunnel is the safest and most economical scheme. But there still have many problems need to be resolved. Here we try to research the relationship between minimum thickness of rock cover and tunnel stability by numerical method. The research combines with the engineering practice of Xiamen subsea tunnel and gives out a minimum safety rock cover thickness.
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2003, Vol. 22 
