| 摘要 |
PCT No. PCT/SE79/00117 Sec. 371 Date Jan. 7, 1980 Sec. 102(e) Date Jan. 7, 1980 PCT Filed May 22, 1979 PCT Pub. No. WO79/01099 PCT Pub. Date Dec. 13, 1979. A device for measuring pore water pressure in soils employs a pore pressure sound (2) as a sensing member and a closed measuring system (5,6) for creating the least possible disturbance in soils having a low degree of permeability, such as clay. The closed liquid-filled measuring system comprises a hypodermic needle type (20) of connection between the pore pressure sound and a measuring device (3), said needle being operative to penetrate a member of resilient material to extend into a liquid-filled chamber in said pore pressure sound and transfer a reading of the pore water pressure to said measuring device. |
