Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1987-06-29
1989-06-06
Taylor, Dennis L.
Hydraulic and earth engineering
Foundation
Columnar structure
403294, 405251, E02D 510
Patent
active
048367176
DESCRIPTION:
BRIEF SUMMARY
The invention relates to means for joining concrete piles comprising a fixed end shoe on each of the adjacent pile ends, and elements for joining the piles at the end shoes, said elements including a number of guides opening at the outside of the pile, close to the adjacent pile ends, guides in one pile being located opposite to guides in the other pile, and locking members, spanning the joint between the piles, which are driven from the outside into guides located opposite to each other in the pile ends to press said ends together by wedge action between guides and locking members.
Joining means of this type is described in the Swedish patent application 7201610-0.
The advantage provided by joining means of the type referred to is that such means can be easily mounted and permits the end shoe to form a completely flat end surface. However, in the prior art embodiment, there is made no provision for maintaining positively in a satisfactory manner a permanent tight engagement between the adjacent pile ends without the risk of looseness arising in the joint between the piles due to vibrations and temperature changes.
The purpose of the invention is to construct the joining means in such a way that there can be provided and maintained a desired prestressing in the locking members, at the same time securing permanent engagement between the adjacent pile ends.
It is also intended to provide safe latching of the locking members in the prestressed condition in the guides.
For said purpose the joining means of the invention has obtained the characterizing features appearing from claim 1.
In order to explain the invention in more detail reference is made to the accompanying drawings which disclose one embodiment of the joining means of the invention and wherein
FIG. 1 is a side view, partly a vertical sectional view, of the adjacent ends of two concrete piles joined by the joining means of the invention,
FIG. 2 is a fragmentary side view of the pile ends taken perpendicularly to the view in FIG. 1,
FIG. 3 is a side view of a guide in the joining means of the invention,
FIG. 4 is a vertical sectional view of the guide in FIG. 3,
FIG. 5 is a side view of a locking member in the joining means of the invention,
FIG. 6 is an end view of the locking member shown in FIG. 5, and
FIG. 7 is a perspective view of a latch member forming part of the joining means, to be located in the locking member for engagement into the guides co-operating with the locking member.
In FIGS. 1 and 2 in the drawings, the upper and lower ends, respectively, of two concrete piles 10 to be joined together are disclosed. As shown here, the piles have square cross-sectional shape, but as far as the invention is concerned they can have any cross-sectional form. Each pile has at the end thereof which is adjacent to the other pile, an end shoe 11 of metal sheet, which encloses the end portion of the concrete pile. This end shoe comprises a number of guides 12 attached by welding to the end shoe and moulded into the concrete pile. Each guide forms a T-shaped groove 13 which opens in the outside surface of the pile and extends perpendicularly to said surface into the pile. The guide is shown in more detail in FIGS. 3 and 4. It forms a threaded blind hole 14 for anchoring the guide to the pile by the end of a reinforcing iron 15 embedded into the pile, being screwed into the blind hole as shown in FIG. 1. Preferably, four guides are provided located in pairs at opposite sides of the pile, the guides in one pile end being opposite to the guides in the other pile end engaged therewith. The transverse portion of the T-shaped groove forms two abutment surfaces 16 for one flange 17 or the other of an I-shaped locking member 18 which is driven into two guides opposite to each other, to be received by one half in one guide and by one half in the other guide, spanning the joint between the two pile ends engaging each other.
In order to secure a satisfactory and permanent connection between the two pile ends the abutment surfaces 16 are spaced from the pile end su
REFERENCES:
patent: 2378562 (1945-06-01), Lahr
patent: 3961491 (1976-06-01), Reddaway et al.
patent: 4050211 (1977-09-01), Wahman
patent: 4362417 (1982-12-01), Vesa et al.
patent: 4605340 (1986-08-01), Stephan
Borg Bertil
Landaeus Kjell
LandOfFree
Means for joining concrete piles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Means for joining concrete piles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Means for joining concrete piles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-37650