AN INVESTIGATION INTO THE CORRELATION BETWEEN THE SEDIMENT PARAMETERS INFLUENCING DEPTH OF MINE PENETRATION AND THE SMALL STRAIN SHEAR STIFFNESS OF MARINE SEDIMENTS

PDF

Authors
  1. McDermott, I.R.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Memorial Univ of Newfoundland, St John's NFLD (CAN) Centre for Cold Ocean Resources Engineering
Abstract
Ground mines pose a danger to all forms of shipping. Depending on the physical properties of the seabed, the angle of incidence of the mine relative to the seabed and the shape of the mine, a ground mine may remain completely exposed or be partially or fully buried within the sediments. The depth at which the mine is buried will govern the success of various detection methods. One objective of the Mine Countermeasures Group, Esquimalt Defence Research Detachment (EDRD), which is responsible for research into ground mines, is to gather a database of seabed physical properties which can be used to model the dynamics of mine burial. EDRD's previous field programs had shown that seabeds composed of soft cohesive sediments present the most challenging environments in which to obtain sediment properties. C-CORE is experienced in the measurement of in situ physical properties of soft seabeds and was contracted by the Mine Countermeasures Group to participate in their March, 1997 cruise off SE Vancouver Island. During this cruise, C-CORE's Soil Stiffness Probe was deployed at eight of EDRD's field sites. These sites were found to have wide-ranging physical properties. Seabed bulk densities ranged from 1154 kg/m cubic to 1918 kg/m cubic and shear stiffnessess ranged from zero to 2.3 MPa. In general, the Soil Stiffness Probe bulk density measurements were comparable to densities, determined the previous year, using core samples. TRUNCATED
Keywords
Buried mines;Sediment properties
Report Number
DREA-CR-98-409;C-CORE-PUB-C47 — Contractor Report
Date of publication
01 Feb 1998
Number of Pages
133
DSTKIM No
98-01873
CANDIS No
508514
Format(s):
Hardcopy;Document Image stored on Optical Disk

Permanent link

Document 1 of 1

Date modified: