| 摘要 |
PURPOSE:To produce high-relaible limit pressure resistance with high precision, by a method wherein a water pressure is exerted in a hole partitioned by a packer, a water pressure, an amount of water poured, and an AE count are recorded, and a limit pressure resistance to pouring of a ground, bedrock, etc. is determined. CONSTITUTION:High pressure water is poured into a space 14', watertightly partitioned by a packer 19, through a pouring pipe 11 with the aid of a pouring pump 12 on a ground surface. A water pressure, an amount of water poured, and AE information, being available under a process in that a water pressure is exerted, are collected in a recording mechanism (d) for recording. The change rates of a water pressure and an amount of water poured are grasped based on generation of AE count, and a limit pressure resistance to pouring of a ground to be poured is determined. This enables decision of the proper pouring pressure of dam grouting, chemical solution pouring method and the like through reliable grasping of the presence of the occurrence of harmful crack by means of the AE count. |
