Hand-Held Hydraulic Rock Drill and Seafloor Fasteners for Use by Divers.
Final rept. Aug 70-Nov 74,
CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF
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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.
- Machinery and Tools
- Marine Engineering