Stress Wave Propagation in Unsaturated Sands. Volume 2. Field Explosive Tests
Abstract
Explosive field tests were conducted in unsaturated Poudre Valley sand for the determination of peak ground shock parameters, propagation velocity and attenuation trends as a function of compactive saturation. The sand was compacted moist to a dry density of 1635 kg/cu.m at compactive saturation levels ranging from 0 to 70 percent. Three explosive masses of 6.22 kg, 7.0 kg and 0. 227 kg TNT equivalency were used at a depth of burial of 1.4 meters to provide scaled range (R/W(exp 1/3)) values ranging from 0.32 m/kg(exp 1/3) to 3.8 m/ kg(exp 1/3). Scaled peak particle acceleration, peak particle velocity, peak stress and propagation velocities are presented as a function of scaled range. Constants (Y-intercept at R/W(exp 1/3) = 1) taken from the developed empirical predictive equations for peak ground shock parameters are generally lower but follow the same trends as those of Tyndall Beach and Ottawa 20-30 sands obtained from centrifuge tests. Slope (-n or n-1) values taken from the same predictive velocity intercepts are lowest at 0 and 13 percent compactive saturations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1993
- Accession Number
- ADA279116
Entities
People
- Edward J. Villano
- Wayne A. Charlie
Organizations
- Colorado State University