Method and system for measuring pore-fluid pressure

摘要

A method for measuring pore pressure is provided using a rigid piezometer that does not need a filter and can be used to measure pore-water pressures in partially frozen soils. This method also can be used to measure pore pressure in a porous media when the hydraulic conductivity of the porous media is low or there is limited amount of pore-fluid available to transfer the pressures. A piezometer is also provided, including: a tube for hydraulic fluid; first and second valves to control fluid flow in the tube and into a porous medium; and a fitting wherein a pressure sensor is positioned to measure fluid pressure in the hydraulic fluid in the tube and a hydraulic fluid droplet ejected from an end of the tube into the porous medium; and an interface of the hydraulic fluid with the pore-fluid within the porous medium, using the droplet placed into the porous medium. The tube (or part of the tube), valves, fittings, and pressure sensor may be enclosed in a housing.

主权项

1. A piezometer comprising:
an oil tube; first and second valves to control oil flow in the oil tube and into a porous medium; a housing, and a fitting within the housing wherein a pressure sensor is positioned to measure oil pressure that is connected to the oil in the oil tube and an oil droplet injected from an end of the oil tube into the porous medium; and an interface of oil with pore water, the interface within the porous medium, using the oil droplet injected into the porous medium.