Pore-water pressure events during the in situ heat transfer experiment simulation: Piezometer probe technology
Single sensor piezometer probes, 8mm in diameter were developed and tested for deep-ocean geotechnical investigations in support of the Subseabed Disposal Program. Two probes were tested in a hyperbaric chamber pressurized to 55 MPa (8000 psi) during a scaled (0.28: 1) simulation experiment conducted at the David Taylor Naval Ship Research and Development Center (DTNSRDC) in Annapolis, Md. Testing was performed for 30 days with the probes inserted in reconstituted illitic marine sediment. Small differential pore-water pressures were generated in response to both mechanically and thermally generated forcing functions. The piezometers sensed very small (approximately 1.7 kPa (0.25 psi)) pore water pressure events during the process of carrying out other experimental objectives. The pressure sensors exhibited excellent sensitivity and stability during other deep-ocean simulated laboratory pressure tests for periods of up to 750 hours. In addition to the measurements of ambient and dynamic pore pressure response to environmental forces, the piezometer test data can be used to derive the in situ undrained shear strengths and permeabilities of seabed sediments. The piezometer probe technology is providing a quantitative means of assessing important geotechnical parameters of fine-grained seabed deposits. 22 refs., 28 figs., 10 tabs.
- Research Organization:
- Naval Ocean Research and Development Activity, NSTL, MS (USA); Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6908589
- Report Number(s):
- SAND-86-7172; ON: DE87005214
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Subseabed Disposal Program In-Situ Heat Transfer Experiment (ISHTE)
Related Subjects
MARINE DISPOSAL
SIMULATION
PROBES
PERFORMANCE TESTING
RADIOACTIVE WASTE DISPOSAL
FEASIBILITY STUDIES
HEAT TRANSFER
PIEZOMETRY
PRESSURE MEASUREMENT
SEA BED
UNDERWATER
ENERGY TRANSFER
LEVELS
MANAGEMENT
TESTING
WASTE DISPOSAL
WASTE MANAGEMENT
052002* - Nuclear Fuels- Waste Disposal & Storage