Accession Number : ADP002389

Title :   Simple Statistical Methodology for Evaluating Rock Mechanics Exploration Data,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CIVIL ENGINEERING

Personal Author(s) : Baecher,G. B.

Report Date : SEP 1983

Pagination or Media Count : 68

Abstract : A simplified approach is to provide a scientific basis for allocating testing and instrumentation and a systematic procedure for interpreting field observations. The aim is to provide a practical tool that can be used and understood. The methods proposed here require little familiarity with probability theory or statistics. They deal only with the averages, variances, and covariances of uncertain parameters, and lead to mathematically simple relations among sources of error or uncertainty, and estimates of engineering parameters. The purpose of a more scientific treatment of site characterization and data analysis is not that it might lead to probabilistic design and risk analysis, but only that it might improve traditional practice. This report is organized in four subsequent sections. The first places the present work within the larger frame of reference of site exploration and characterization. The second briefly summarizes the mathematical background upon which later developments rest. The third presents a procedure for identifying probable errors in estimates of rock mass properties or profiles. The fourth develops a simplified sampling theory by which testing programs might be designed. Finally, conclusions are drawn on how one should proceed from the foundation already developed.

Descriptors :   *Rock mechanics, *Statistical tests, Civil engineering, Field tests, Measurement, Sampling, Statistical analysis, Statistical samples, Algebra, Estimates, Symposia

Distribution Statement : APPROVED FOR PUBLIC RELEASE