Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1989-07-19
1991-08-20
Taylor, Dennis L.
Hydraulic and earth engineering
Foundation
Columnar structure
405272, 166385, 175 19, E02D 702
Patent
active
050409263
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing piles in situ immediately prior to the use thereof for foundation, ground reinforcement or soil stabilization purposes.
In conventional piling operations, piles made from concrete, wood or steel are generally used. Whichever type of pile that is used, the length of the manufactured pile is generally restricted, although the pile lengths may vary from a few meters up to several tens of meters. It is quite difficult to handle and manipulate very long piles, and to drive them down into the ground requires machinery equipped with a high tower. Shorter piles must be formed with interconnecting means allowing the piles to be joined together, and such interconnecting means often increase the pile manufacturing costs considerably, in addition to which the operations of joining the pile sections together during the piling work is quite time-consuming.
In conventional piling operations the piles are usually driven down into the ground with the aid of some kind of percussion equipment. Such equipment generates heavy vibrations and noise when in use, which could constitute an environmental disturbance.
SUMMARY OF THE INVENTION
The present invention provides a method allowing various types of piling operations to be performed in a considerably more simple and therefore less expensive manner, while at the same time reducing vibrations and noise to a minimum.
The method in accordance with the invention is characterized therein that a strip, preferably made from steel, is wound off a roll and is carried through a rotating-roller shaping unit of a king known per se, in which unit the strip is subjected to plastic deformation in its lengthwise extension, whereby the strip is imparted with a desired predetermined cross-sectional profile configuration, that the pile thus shaped, when leaving the roller shaping unit, is driven downwards or laterally into an earth layer by means of pressure on the pile, and in that, upon attainment of the desired penetration depth and/or the desired pile, length the pile is severed level with or close to the ground surface.
BRIEF DESCRIPTION OF THE DRAWINGS
Various embodiments of the pile in accordance with the invention and the method of driving the pile into the ground will be described in closer detail in the following with reference to the accompanying drawings, wherein:
FIG. 1 is a lateral view of a utility vehicle fitted with the piling equipment in accordance with the invention.
FIG. 2 is a cross-sectional view through a road embankment stabilized by piling.
FIG. 3 is a sectional view through a slope stabilized in a similar manner,
FIG. 4a through 4e show, by way of example, end views of various piles in accordance with the invention,
FIG. 5 is a schematical plan view of an arrangement including four installation shafts with an intermediate "pile wall", and
FIG. 6 is a lateral view of a modified embodiment of the utility vehicle illustrated in FIG. 1.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
FIG. 1 illustrates a vehicle 1 serving as a utility vehicle when performing the piling operations. The vehicle is equipped on its upper portion with a roller stand 2 which supports a roll 3 of a strip material 4. The strip 4 is carried over a deflector rail 5 and fed into a rotating-roller shaping unit 6. The basic structure of this unit is of a prior-art nature and includes pairs of rollers 7 which are designed to shape the initially flat strip blank during the successive advancement of the strip 4 into the desired predetermined cross-sectional profile configuration. A pair of driving wheels 8 formed integrally with the shaping unit 6 are positioned one on either side of the shaped strip. The purpose of the driving wheels 8 is to drive the pile 9 thus shaped by pressing it down to the desired penetration depth in the underlying earth layers 10. Below the driving wheels 8, a severing means 11 is located, by means of which the pile 9, when having been driven down into the desired position, may be cut
REFERENCES:
patent: 3631933 (1972-01-01), Bryant
patent: 4024719 (1977-05-01), Risseuw
patent: 4097854 (1978-06-01), Black et al.
patent: 4166508 (1979-09-01), Van den Berg
patent: 4504175 (1985-03-01), Zion
patent: 4589803 (1986-05-01), Totten, III
patent: 4755080 (1988-07-01), Cortlever et al.
"Forming and Forging", Metals Handbook, Ninth Edition, vol. 14, pp. 624-635.
"Foundation Design and Construction", M. J. Tomlinson, Fourth Edition, .COPYRGT.1983, pp. 475-477.
"Foundation Engineering", G. A. Leonards, McGraw-Hill Book Company, Inc., .COPYRGT.1962, pp. 709-710.
De Liguori Franco S.
Taylor Dennis L.
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