ABOUT THE CAVITY WHERE THE UNDERGROUND WATER FLOWS THE CAVITY CHARGING METHOD WHICH IS ENVIRONMENTAL-FRIENDLY

摘要

PURPOSE: A cavity filling method is provided to prevent the discharge of a cement component mixed with a second injection material by prefilled first injection material to the outside, to reduce waste of the injection material, and to form rhizome with uniform strength. CONSTITUTION: A cavity filling method for a cavity layer with the flow of subsurface water comprises the steps of: forming a punched hole(2) from the ground to underground capavity(10) using drilling equipment with an excavating bit; inserting a lot connected to an injector of the ground into a punched hole; separately preparing the first injection material(11) which is not mixed with cement and the second injection material(12) which is mixed with cement; reinserting the lot into the punched hole filled with the first injection material; and forming rhizome by injecting the second injection material through the lot.