| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of stopping welling up running water caused by the deterioration of post-processing materials, such as an old well and boring hole, and other reasons in an underground drilling work executed at a level lower than an underground water level, particularly a method for stopping running water on which ordinary chemical injection construction method is ineffective. SOLUTION: The water-stopping method for a ground having running water is a method for stopping the running water welling up from a flooding hole of the ground. A granular material K having a material diameter and specific gravity large enough to be prevented from being carried away by the running water is supplied from flooding openings a, c, and d into flooding holes A, C, and D to fill them with the granular material K to suppress the energy, speed, and volume of running water. A chemical fluid is then injected into the area filled with the granular material K to cause the chemical fluid to gel or solidify in the space of the granular materials having a high specific gravity to close the flooding holes A, C, and D to stop running water. COPYRIGHT: (C)2010,JPO&INPIT
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