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A subway section tunnel, located in a silty fine sand layer with a large water content, the ground settlement control is strict, and does not have water conditions, it is advisable to use () construction A. shallow buried excavation B. open excavation method C. shield

author：Two build fighting

A subway section tunnel, located in a silty fine sand layer with a large water content, has strict ground settlement control and does not have water conditions, so it is advisable to use () construction

　　A. Shallow buried underground excavation B. Open excavation method

　　C. Shield method D. Cover digging method

subway control tunnel
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