The plug and dead water construction method null for dead water construction of leak spring water in the bar hole intermediate

摘要

PURPOSE: To prevent a drilling edge from being damaged and omit a recovery work to improve working efficiency by using a plug for water cut-off work in which easily cut brush material is wound on a stem fitted to the extreme end of a rod made of easily cut material. CONSTITUTION: A plug 52 wound with brush material 51 of easily cut material on a stem 50 fitted to the extreme end of a water cut-off chemicals injection rod 55 made of a wood, resin, or the like easily cut by a drilling edge is mounted on the rod 55, and it is pushed in the lower position of the leakage water or spring water position of a boring hole 53. Next granular substance 56 capable of being crushed by the drilling edge is thrown down and lockingly piled on a brush material part 51, pessure water is sent to the rod 55 to separate the plug 52, and then water cut-off chemicals (consolidating material) 57 is injected to the granular substance layer 6. A consolidated layer 59 is formed, leakage water or spring water gaps are clogged, the consolidated layer 59 is drilled by a drilling machine to cut off, remove, and open a hole. Hereby, the water cut-off work is set simply and quickly, and the device can be light- weighted and of low price.