Accession Number : ADD009494

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

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Sidney,Roger

Report Date : 12 Mar 1982

Pagination or Media Count : 37

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 :   *Patent applications, *Pore pressure, Soils, Water, Interstitial, Dynamic pressure, Measuring instruments, Piezoelectric gages

Subject Categories : Soil Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE