Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
June 1997
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Ripping Frozen Ground with an Attachment for Dozers
PE: 7.627.84
PR: 4A762784AT42
TA: CS
6. AUTHORS
WU: C06
Paul V. Sellmann and Dale R. Hill
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
Special Report 97-14
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
Office of the Chief of Engineers
Washington, D.C. 20314-1000
11. SUPPLEMENTARY NOTES
For conversion of SI units to non-SI units of measurement, consult ASTM Standard E380-93, Standard Practice for Use of the
International System of Units, published by the American Society for Testing and Materials, 1916 Race St., Philadelphia, Pa.
19103.
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161
13. ABSTRACT (Maximum 200 words)
Ripping of hard and frozen ground is commonly done by using crawler tractors with rear-mounted rippers that
are usually a permanent part of the machine. Ripping is an attractive alternative to other methods of breaking a
hard surface layer that restricts excavation, since it utilizes existing equipment and personnel, and a tractor that
can be used for the excavation project. A simple ripper attachment for use on the blade of a dozer was used to
determine if this easily installed tool could provide some ripping capability when machines with rear-mounted
rippers are not available. This ripper attachment was used in a range of frozen soils that could not be excavated
with a dozer, and was used on tractors ranging in size from small commercial dozers to a large military dozer with
a suspension system. In all cases, at the sites used, the ripper attachment provided the machines with some ripping
capability. The ripper was also easy to install, with no modifications required to the tractors or the rippers.
14. SUBJECT TERMS
15. NUMBER OF PAGES
24
Bulldozers
Moldboard ripper
Ripping frozen ground
16. PRICE CODE
Cold regions
Ripper attachment
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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