Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1986-03-27
1988-02-23
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 19, 405154, E21B 400
Patent
active
047267119
ABSTRACT:
The invention is in an apparatus of self propelled type for forming an underground passage or space as the apparatus moves horizontally, vertically or in some other direction relative to the surface of the ground. The apparatus includes a head for reducing resistance of the soil through which it moves and for squeezing the soil in a desired direction as the head is caused to undergo multimode vibration. The apparatus also includes a thrust producing means for developing forward thrust and a connection for connecting the head and thrust producing means.
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E. D. Mikrashevsky and H. Marigunoff, "Vibration Construction Machinery", 1964, pp. 122-123.
China Industrial Publication Co., "Piling Project", 1962, pp. 64 through 66.
Chinese journal, "Aviation Knowledge", third issue of 1977, p. 10.
Sun Gun-Sen and Zhen Da-Tong, "Soft Foundation and Underground Project", Sep. 1984, pp. 630 through 631.
Gan Dor-Chen, "Piling", 1959, pp. 12 through 13.
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