Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Project BUCKBOARD, Grouting Support
In Project BUCKBOARD, high-explosive charges were detonated in basalt to determine their earth-moving ability in this type of formation. One shot (shot 12), a 40,000-lb charge of spherically shaped TNT placed 43 ft below ground surface in an 11-ft-diameter cavity at the bottom of a 4-ft-diameter drilled hole, was to be used for ground-motion studies. The Waterways Experiment Station determined pertinent physical properties of the basalt and developed a grout mixture with matching properties for use in grouting earth-motion measuring instruments into eight holes drilled near shot 12; grouted the instrument holes; and from specimens of the field-mixed grout determined its physical properties at shot time. The grout required a high water content to be pumpable; consequently its compressive strength and ultrasonic pulse velocity were less than desired. (Author)
Project BUCKBOARD, Grouting Support
In Project BUCKBOARD, high-explosive charges were detonated in basalt to determine their earth-moving ability in this type of formation. One shot (shot 12), a 40,000-lb charge of spherically shaped TNT placed 43 ft below ground surface in an 11-ft-diameter cavity at the bottom of a 4-ft-diameter drilled hole, was to be used for ground-motion studies. The Waterways Experiment Station determined pertinent physical properties of the basalt and developed a grout mixture with matching properties for use in grouting earth-motion measuring instruments into eight holes drilled near shot 12; grouted the instrument holes; and from specimens of the field-mixed grout determined its physical properties at shot time. The grout required a high water content to be pumpable; consequently its compressive strength and ultrasonic pulse velocity were less than desired. (Author)
Project BUCKBOARD, Grouting Support
R. A. Bendinelli (Autor:in)
1961
11 pages
Report
Keine Angabe
Englisch
Project HOBO, Grouting Support
| NTIS | 1960
Drilling and Grouting Support, Project COWBOY
| NTIS | 1961
Laboratory and Field Grouting Support for Project Scroll
| NTIS | 1969
| NTIS | 1965