Abstract: The groundwater  and mud rush are the frequently encountered geohazards in the excavation of Beilingshan Tunnel. The common reasons that resulting in these geohazards are summarized. Conventional mitigation measures, such as, debris retaining dike, reinforcement by grouting, cavity backfill, small perforated pilot pipe grouting are also introduced in the paper. For the Beilingshan Tunnel project. The site specific geohazards prediction method was proposed for the site geologic condition with rich groundwater and broken rock mass.

Key words: Tunnel Engineering, Water and Mud Rushes, Mitigation Methods, Geologic Condition Predictions