Stone working – Splitting – shearing – and punching
Patent
1993-05-07
1995-05-09
Rachuba, Maurina T.
Stone working
Splitting, shearing, and punching
125 12, B28D 132
Patent
active
054130867
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to the treatment of reinforced concrete piles after driving.
BACKGROUND
In the use of reinforced concrete piles for supporting buildings, it is common practice to drive the piles and then to cutoff the amount of pile projecting above the desired finished level. This removal of the undesired pile portion involves cutting the pile at a cutoff level and then removing the concrete down to the finished level, exposing length of the reinforcement for incorporation into a subsequently poured concrete structure.
Conventionally, piles are cutoff using explosives. The concrete is removed to the finished level using a jackhammer. This procedure is time consuming and costly. In most cases, it is necessary to obtain a permit for the necessary blasting. In addition, the shock waves caused by the blasting can damage the pile. While mechanical cutters have been proposed for cutting off piles, these have not proven entirely satisfactory because they are difficult to use, especially where access to piles is restricted. They do not address the problem of removing concrete from the reinforcement down to the finished level.
SUMMARY
According to one aspect of the present invention there is provided a method of preparing an end of a pile comprising a concrete matrix and elongate reinforcement therein, said method comprising: selected position along the pile; driving the blade into the surface of the concrete matrix around the periphery of the pile, without engaging the reinforcement; the end of the pile and selected position; position along the pile by driving the breaker means into engagement with the concrete matrix; and
According to another aspect of the present invention there is provided apparatus for preparing an end of a pile comprising a concrete matrix and longitudinal reinforcement embedded therein, said apparatus comprising: along the pile with the cutting edges confronting the pile; concrete matrix around the periphery of the pile; of the pile and the selected position; matrix.
In preferred embodiments of the apparatus, the blades are shaped to match the profile of the pile and are wedge shaped in section so that as they are driven into the surface of the pile, tension is applied to the concrete matrix, causing it to fracture generally in the plane of the blades. The breakers are preferably mounted with the blades and operate simultaneously with them so that in a single actuation of the apparatus, the concrete above the finished level is separated from the remainder of the pile and broken into fragments.
It is also preferred that the apparatus be constructed using a frame and drivers that will accommodate a shear blade and an anvil for cutting off the pile.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate exemplary embodiments of the present invention,
FIG. 1 is a plan view of an apparatus for cutting off a pile end according to the present invention;
FIG. 2 is a cross-section along line 2--2 of FIG. 1;
FIG. 3 is a side elevation of the apparatus of FIG. 1;
FIG. 4 is an end elevation of the apparatus of FIG. 1;
FIG. 5 is a cross-section along line 5--5 of FIG. 1;
FIG. 6 is a plan view of a set of blades and breakers for cutting and breaking the concrete pile;
FIG. 7 is a cross-sectional elevation showing the use of the apparatus using the blades illustrated in FIG. 6;
FIG. 8 is a plan view of a second embodiment of the blades and breakers;
FIG. 9 is a cross section along line 9--9 of FIG. 8;
FIG. 10 is a plan view of a centering anvil for use with the shear blade of FIG. 1; and
FIG. 11 is a front elevation of an anvil of FIG. 10; and
DETAILED DESCRIPTION
Referring to the accompanying drawings, especially FIGS. 1 through 4, there is illustrated a pile cutter 10 having a rectangular frame 12 with a head end 14, two side rails 16 and 18 and a foot end 20. As illustrated in FIGS. 1 through 4 the frame accommodates a sliding shear blade 22 and an anvil 24 on the head end 14, confronting the blade. The shear blade is connected
REFERENCES:
patent: 2612194 (1952-09-01), Ingraham et al.
patent: 2808822 (1957-10-01), Celapine
patent: 2819710 (1958-01-01), Mangis
patent: 3056287 (1962-10-01), McKee
patent: 3056567 (1962-10-01), McKee
patent: 3392719 (1968-07-01), Clanton
patent: 3491811 (1970-01-01), Larson et al.
patent: 3495489 (1970-02-01), Savory
patent: 3727600 (1973-04-01), Schlough
patent: 4114270 (1978-09-01), Jansen-Herfeld et al.
patent: 4124015 (1978-11-01), Isaksson
patent: 4273171 (1981-06-01), Spaulding
patent: 4641694 (1987-02-01), Rohde
patent: 4979489 (1990-12-01), Abbasov et al.
Civil Engineering and Public Works Review, vol. 59, No. 12, Dec. 1964, London, p. 1511, "Engineering Developments In The USSR".
Ade Stanley G.
Battison Adrian D.
Rachuba Maurina T.
Thrift Murray E.
LandOfFree
Concrete pile cutter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Concrete pile cutter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Concrete pile cutter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1699006