In engineering geology, loess occupies a special status because of the special ingredients and nature. Engineering characteristics show considerable differences between the loess tunnels and ordinary rock tunnel. Loess tunnels in Zhengzhou-Xi'an passenger dedicated railway line are representative because of the V-Q3 new loess, shallow-buried, large-section and more under-pass characteristics. It shows how to solve the questions about ground settlement controls, excavation and support methods.
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