Through expatiating the conditions which produce dissolved rock and the influence of different limestone caves on the tunnel construction, simultaneously discussing the exploration forecasting technology to limestone cave tunnel, and according to the different limestone caves, then propose the corresponding treatment measure.

introduce completed engineering geological condition and the way of comprehensive leading geology prediction in Yesanguan and Dazhiping tunnel,also explain their validity and confirming each other used in complicated Karst Tunnel Construction by combining the project embodiment.