Hand-Held Hydraulic Rock Drill and Seafloor Fasteners for Use by Divers.

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Abstract:

Underwater construction operations require an improved diver-operable rock drill and efficient and reliable seafloor rock fasteners. An experimental hydraulically powered rock drill was fabricated from commercially available components. The results from the shallow-water testing of this drill were used to design a prototype underwater rock drill capable of operating to ocean depths of 120 feet. Testing of the prototype rock drill revealed that it either met or exceeded initial performance requirements. Four brands of expansion-type rock bolts were investigated for use as seafloor rock fasteners. Also, a new type of rock bolt was developed for use in coral seafloors. Results of short- and long-term tests are presented along with a summary of important design parameters.

Author(s):
Brackett, R. L. ; Parisi, A. M.
Author Organization(s):
CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF
Descriptive Note:
Final rept. Aug 70-Nov 74,
Supplementary Note:
See also report dated Jul 74, AD-786 350.
Pagination:
0058

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
CEL-TR-824
Task Number(s):
YF53535003
Project Number(s):
YF53.535
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*FASTENINGS, *DRILLS, *ROCK DRILLING, *UNDERWATER TOOLS, HAND HELD, HYDRAULIC EQUIPMENT, ANCHORS(STRUCTURAL), BOLTS
Field(s)/Group(s):
Machinery and Tools, Marine Engineering
Keyword(s):
*Rock bolts
Report Date:
1975 Aug 01