A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
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 (author)
1961
11 pages
Report
No indication
English
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