Download or read book Stress Wave Propagation in Unsaturated Sands Volume 2 Field Explosive Tests written by Edward J. Villano and published by . This book was released on 1993 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Stress Wave Propagation in Unsaturated Sands written by E. J. Villano and published by . This book was released on 1993 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Blast induced Stress Wave Propagation Through Unsaturated Sand written by Edward J. Villano and published by . This book was released on 1993 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Wave Propagation in Unsaturated Sands Volume 1 Centrifuge Modeling written by Andy J. Walsh and published by . This book was released on 1993 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explosive model testing was conducted using a geotechnical centrifuge in order to simulate prototype stresses and ground motions in a representative cohesionless backfill. Models were constructed of sand and compacted moist to a constant void ratio using a vibratory technique. Exploding detonators were used to simulate contained bombs in the backfill material. The objective of this study was to determine the influence of moisture content, at the time of backfill compact ion, on blast induced stress wave propagation. Models were constructed to 1/18.9 and 1/26.3 scales. Explosives consisted of 1031 mg and 350 mg of PBX 9407 and were buried to depths of 7.6 cm and 5.4 cm respectively. These scaled models simulated prototype charges of 6.9 kg and 6.4 kg (7.8 kg and 7.3 kg TNT equivalent) at a depth of burial of 1.4 meters. Attenuation coefficients (n) show some influence with respect to saturation. Peak stress and peak particle acceleration intercepts at a scaled distance of one are lowest at 0 and 53 percent saturations and are maximum at 35 percent saturation. Peak particle velocity intercepts are lowest at 0 and 70 percent saturations and again are maximum at 35 percent saturation.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1994 with total page 1496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Geotechnical Engineering written by and published by . This book was released on 1996 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Dynamics Progress and Prospect Volume 2 written by Jianchun Li and published by CRC Press. This book was released on 2023-05-28 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock Dynamics: Progress and Prospect contains 153 scientific and technical papers presented at the Fourth International Conference on Rock Dynamics and Applications (RocDyn-4, Xuzhou, China, 17-19 August 2022). The two-volume set has 7 sections. Volume 1 includes the first four sections with 6 keynotes and 5 young scholar plenary session papers, and contributions on analysis and theoretical development, and experimental testing and techniques. Volume 2 contains the remaining three sections with 74 papers on numerical modelling and methods, seismic and earthquake engineering, and rock excavation and engineering. Rock Dynamics: Progress and Prospect will serve as a reference on developments in rock dynamics scientific research and on rock dynamics engineering applications. The previous volumes in this series (RocDyn-1, RocDyn-2, and RocDyn-3) are also available via CRC Press.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Intensity Compressive Stress Wave Propagation Though Unsaturated Sands written by Steven J. Pierce and published by . This book was released on 1989 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1964 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Centrifuge Modling of Stress Wave Propagation in Unsaturated Sands written by Andy J. Walsh and published by . This book was released on 1993 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Blast induced Stress Wave Propagation in Unsaturated Sand written by Nathan A. Dowden and published by . This book was released on 1995 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal and Rock Dynamic Disasters Advances of Physical and Numerical Simulation in Monitoring Early Warning and Prevention Volume II written by Jingjing Meng and published by Frontiers Media SA. This book was released on 2024-05-01 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Research Topic is Volume II of a series. The previous volume can be found here: Coal and Rock Dynamic Disasters: Advances of Physical and Numerical Simulation in Monitoring, Early Warning, and Prevention With the soaring growth of global population and socioeconomy, energy consumption and demand has been rapidly rising, and coal would still remain a fundamental energy source for a long time into the future. Seeking deep coal resources becomes an inevitable trend due to the depletion of shallow coal resources. Deep mining of coal resources promotes socioeconomic development, whereas bringing a variety of security challenges. In deep underground, there is a significant risk increase in coal and rock dynamic disasters (CRDDs), owing to the changes in physical and mechanical properties of coal and rock. In this regard, it is of great importance and necessity to prevent and control CRDDs effectively and efficiently.
Download or read book Measurements of Stress strain Peak Particle Velocity and Wave propagation in Three Sands written by W. L. Durbin and published by . This book was released on 1965 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Wave Propagation in Unsaturated Sands written by A. J. Walsh and published by . This book was released on 1993 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Preliminary Micromechanical Model for Stress Wave Propagation in Unsaturated Sands written by Dean B. Durkee and published by . This book was released on 1992 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
