Flat Jack Tests.
Abstract
Tests were conducted utilizing large flat jack devices placed in a vertical slot for high pressure loading of rock to measure in-situ properties of a rock mass. The high pressure flat jack devices were used as a site investigation tool to obtain rock mass properties. Tests were conducted before and after a 100 ton surface high explosive detonation test to assess explosive effects on the rock. It was conslusively demonstrated by these tests that meaningful flat jack tests could be successfully accomplished; also, a significantly different response of the rock medium was measured as larger areas of rock were loaded. Surface jointing was severely disturbed by the explosion. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 06, 1970
- Accession Number
- AD0715264
Entities
People
- Craig R. Smith
- Warren Pfefferle
Organizations
- The Aerospace Corporation