A method for preventing the escape of air inside of a subterranean cavity

摘要

The water-insoluble filler in the form of bubbles is provided in the underground cavity. Subsequently, the filler makes it possible, on a lower surface and a lower wall surface of the underground cavity to adhere to penetrate into these. Thereafter, the cured filler material, which has penetrated. In this case, the water-insoluble filler in the form of bubbles again be provided in the underground cavity. In addition, water is introduced into the underground cavity, in order to allow the filler rising. The risen filler is made possible on an upper wall surface and a ceiling surface of the underground cavity to adhere to penetrate into these. Thereafter, the cured filler material, which has penetrated. In this case, when the filler, in an inner surface of the underground cavity, a pressure in the underground cavity can be increased. In addition, if the filler has been cured, a temperature in the underground cavity can be increased.