ANALYSIS OF STRUCTURE CHARACTERISTIC AND HARM OF WATER INTRUSION IN SOME KARST TUNNEL, GUIZHOU

According to hydrology geology and engineering geology reconnaissance material of this tunnel, its rock layer including the water-rock group's division, the geological water-storing structure, the surface water growth, the ground water growth, the surface water and the ground water military supplies, the tunnel elevation and the appearing spring elevation relations were analyzed and appraised ; the tunnel various spots welled up the water situation was forecasted, and the runoff modulus law was used to forecast the tunnel welled up normally the water volume and wells up most greatly the water volume, the result was forecasted to indicate that the tunnel welled up the water spot mainly to concentrate in middle, welled up normally the water volume 10.3?104m3穌-1, rainy season most greatly welled up water volume 22.9?104m3穌-1, then the tunnel construction proposal was put forward.