Detection and treatment method of karst water in tunnel

The invention discloses a detection and treatment method of the karst water in a tunnel. The detection and treatment method of the karst water in the tunnel includes the following steps of a, detection of karst, specifically, before construction of the tunnel, the surrounding rock geological disaster condition in front of the tunnel face is understood so as to determine the location, scale and size of the karst; b, grouting construction with a large pipe shed; and c, grouting construction with a small pipe or a curtain. By adoption of the treatment principle of main blocking and combination of draining and blocking, a basic thought of the treatment technology of the karst water in the tunnel is determined. By detecting the specific location of the karst water and water yield, and taking measures of guiding and draining part of the karst water timely, security of operating personnel and equipment can be guaranteed; on the basis of analysis of the karst water and guiding and draining part of the karst water, full-face pre-grouting of the tunnel is conducted so as to block a passage of the karst water and guarantee security of tunnel construction. The detection and treatment method of the karst water in the tunnel is extremely suitable for treatment construction of the karst water in the tunnel, and meanwhile, has the reference significances for construction of highways, municipal works and water conservancy tunnels under similar geological conditions.