Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1985-05-17
1986-09-30
Husar, Cornelius J.
Hydraulic and earth engineering
Foundation
Columnar structure
173 5, 173145, 173146, 192 55, F02D 700
Patent
active
046144625
ABSTRACT:
A rotation device for settling a pre-molded foundation pile into the earth by imparting axial loading thereto and by imparting torque of approximately equal magnitudes to both the upper- and lowermost portions of the foundation pile. A clutch assembly comprising upper and lower pawl members is disposed on the upper end of the foundation pile. A driving rod passes through the clutch mechanism and the premolded pile. Upper and lower driving blocks of the rotation rod are faceted for nonrotationally engaging, respectively, the clutch mechanism and the lowermost portion of the foundation pile. Torque is imparted from the driving rod to the lowermost portion of the foundation pile through the lower driving block. Torque also is imparted from the driving rod through the upper driving block, the pawls of the clutch mechanism and then to the uppermost portion of the foundation pile. Because torque is imparted to the foundation pile at both the upper and lower ends thereof, twisting moments may be minimized along the length of the foundation pile. In the event of an overload, the pawl members of the clutch assembly may slip with respect to each other, thereby preventing damage to the foundation pile. Axial loading is transmitted to the foundation pile through the clutch assembly.
REFERENCES:
patent: 1799918 (1931-04-01), Marsden
patent: 2578834 (1951-12-01), Piper
patent: 3420320 (1969-01-01), Washita
patent: 3763654 (1973-06-01), Matsushita
patent: 4195698 (1980-04-01), Nalcagawasai
Daido Concrete Kogyo Kabushiki Kaisha
Hanson Douglas W.
Husar Cornelius J.
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