Reduction of Embedment Anchor Capacity Due to Sediment Disturbance.

Abstract

The results of field testing propellant-actuated embedment anchors are presented. A large number of field tests were run in which 9 x 18-inch anchors were fired or pushed into a very soft, moderately sensitive clayey silt. A comparison is made between the predicted and observed holding capacities. The measured short-term holding capacities of these anchors were 75 to 85% of those predicted. This reduction in capacity could not be attributed to sediment disturbance during anchor penetration, but is thought to result primarily from sediment disturbance during anchor keying. Sediment disturbance during penetration does have a significant effect on anchor keying distance and, depending on the sediment strength profile and penetration, has an indirect effect on anchor holding capacity. A recommendation is made to reduce the computed holding capacity by 20% for anchors in the field. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1977
Accession Number
ADA046016

Entities

People

  • K. Rocker

Organizations

  • Naval Facilities Engineering Service Center

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Civil Engineering
  • Deep Oceans
  • Deployment
  • Field Equipment
  • Field Tests
  • Grain Size
  • Gun Barrels
  • Laboratory Tests
  • Measurement
  • Physical Properties
  • Pore Pressure
  • Pressure Measurement
  • Propellants
  • Shear Strength
  • Shear Tests
  • Soils

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Oceanography.
  • Pavement Materials Engineering.