Publikationsdatum:
1980-08-01
Beschreibung:
A pneumatic seal has been developed to convert 50.8 mm standpipes to closed-system piezometers utilizing commercially available pneumatic transducer piezometers. This sealing system permits retrieval of the piezometers for recalibration or reuse elsewhere. A nonreinforced inflated rubber membrane seal was found to be satisfactory in soils of medium to high permeability and moderate piezometer pressures. A mesh-reinforced rubber membrane seal was found to be much superior and reduced the reaction of the seal to changed hydraulic pressures to unmeasurably small movements. This gave the piezometer better compliance characteristics making the system suitable for measuring relatively small pressure changes in soils of low permeability. Design and construction details of the nonreinforced membrane seal and mesh-reinforced membrane seal are presented. Field response times and operating pressures are discussed.
Print ISSN:
0008-3674
Digitale ISSN:
1208-6010
Thema:
Geologie und Paläontologie
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