Investigation of Parameters and Classification Relationships for Marine Rock Strata Quality and Anchorage Characteristics
Abstract
The proposed two-year research program envisaged investigation parameters and determining classification relationships that could incorporate rapidly and remotely determined geologic and geophysical parameters relevant to the overall quality and anchorage characteristics of seafloor rock strata. The approach used in the proposed research afford was fivefold: i) to assess index tests for rapid and remote estimates of the strength and/or hardness of marine rocks as input data for a modified rock mass rating system; ii) to perform appropriate laboratory tests on marine rocks to characterize the rock materials at typical sites where anchorage holding capacity needed to be assessed; iii) to analyze a special geophysical technique, such as the 'petite sismique' method, for assessing its potential for determining seafloor rock structure conditions; iv) to evolve calculation procedures along the line of the Rock Mass Rating (RMR) classification system (modified for seafloors) for relating rock strata quality to anchorage holding characteristics; v) to assess the validity of these procedures through field trials and case histories back-analyses. It was envisioned in the research proposal that an effective rock classification approach for seafloor applications will be based on two main classification parameter types: rock material strength and rock mass structure characteristics, e.g., blockiness. Appropriate numerical values for each type of parameters would be related to the overall seafloor conditions for engineering purposes, and to the anchorage holding capacity. (kt)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1989
- Accession Number
- ADA215850
Entities
People
- Z. T. Bieniawski
Organizations
- Pennsylvania State University