Accession Number:

AD0757116

Title:

Full-Scale Field Test Results of the REAM Concept for Hard Rock Excavation

Descriptive Note:

Final rept. 17 Dec 19171-12 Nov 1972

Corporate Author:

PHYSICS INTERNATIONAL CO SAN LEANDRO CA

Personal Author(s):

Report Date:

1973-01-01

Pagination or Media Count:

76.0

Abstract:

The report describes the results of the full-scale field tests of the REAM concept for hard rock excavation. REAM is an innovative method of rock disintegration which utilizes the impact energy of high velocity projectiles to fracture and eject the rock. The concept was demonstrated by driving a 13-foot- diameter tunnel to a depth of 26 feet in a granitic rock formation at Hope Valley, California. The average mass of rock removed by the 10-pound concrete projectiles impacting at 5000 ftsec was 3000 pounds. In addition to presenting the rock breakage data, this report discusses the characteristics of the impact ejecta, muck distribution, and wall contour control.

Subject Categories:

  • Civil Engineering
  • Construction Equipment, Materials and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE