Accession Number : ADD010663

Title :   Pore Pressure Probe Assembly and Two-Stage Emplacement Thereof.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Sidney,R

Report Date : 11 Oct 1983

Pagination or Media Count : 10

Abstract : A system for measuring transient pore water pressure in the ground utilizes a unique probe assembly and two-stage emplacement technique therefor. In the initial stage, a large, robust primary probe member of a probe assembly in the measuring system is pushed into the ground to the selected measurement region. In the final stage, a small secondary probe member which is contained within the primary probe member is ejected into the soil when the primary probe member is emplaced at the desired region. The secondary probe member contains a pressure sensor in the form of a highly miniaturized, fast response piezometer which is capable of achieving a responsive coupling with interstitial fluid in the region of measurement. (Author)

Descriptors :   *Patents, *Pore pressure, *Piezoelectric gages, *Dynamic pressure, *Pressure gages, Soils, Measuring instruments, Water, Probes, Emplacement, Quick reaction, Interstitial, Detectors, Measurement, Staging, Assembly, Pressure, Miniaturization, Fluids

Subject Categories : Soil Mechanics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE