A kind of geological disasters such as water bursting often occurs in karst area in the process of informational construction of tunnel

which bring momentous disaster and economic loss to construction safety

so the precise and immediate advance forecast to the development of karst is the key problem to be researched and resolved currently in tunnel dynamic design and informational construction in karst areas

which brings important theoretical significance and practical value. The method of forecasing karst-fractured groundwater in tunnel informational construction is firstly summed up

then TSP and infrared water detecting method are used synthetically to detect a special long road tunnel based on hydrogeological analysis

which gains good prediction results. It has guiding significance to similar projects.