An Ice Excavation Machine.
Final rept. Aug 73-Jun 76,
CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF
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A review of operational requirements indicates a continuing need for equipment to excavate ice to facilitate polar construction. A 30-hp ladder-type trencher was selected and procured for its low ground pressure and versatility. The chain was outfitted with specifically designed conical ice teeth, and a rotating ice chipper drum was designed and fabricated for the backhoe arm. Both modifications, along with an off-the-shelf hydraulic impactor attachment, were evaluated during a field test program after undergoing shakedown performance tests in the laboratory. A similar, but larger machine with identical teeth, procured under a separate task, was observed during an extended Antarctic ice-trenching operation. The CEL-designed conical teeth made both ice excavation machines very efficient trenchers, cutting over 3,000 lineal feet 900 m of ice with an average specific energy of only 220 in.-lbin.3 1,500 kPa. Both backhoe attachments were effective for special applications, such as ice hummock removal and deadman anchor emplacement. Author
- Construction Equipment, Materials and Supplies