| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for measuring ground-water pressure allowing the precise measurement of ground-water pressure within a boring hole bored upward from a gallery. SOLUTION: A vertically long borehole device 3 is inserted into the boring hole 2 bored upward from the gallery 1, the lower end of the boring hole 2 is sealed with a hole fixing device 70, and water is collected in the boring hole while extracting the internal air of the boring hole 2 through a passage communicating from the upper end of the device 3 to the lower end thereof. Packers 10 arranged at prescribed intervals in the device 3 are expanded, and the ground-water pressure in a section partitioned by the packers 10 is measured by a pressure sensor 28 provided on the device 3.</p> |
