Risk Analysis on Entrance with Shallow-buried and Unbalanced Pressure of Jiqingling Tunnel and the Measures

Abstract:

Based on the engineering case in Jiqingling tunnel, risk analysis was made on the construction of tunnel entrance in poor geological condition with shallow-buried and unbalanced pressure. Integrated prevention measures for geological diseases were put forward with early support strengthening, short cycling excavating and early support closing.

Key words:Jiqingling tunnel; shallow-burying; unbalanced pressure; entrance; risk analysis; integrated treatment