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(11) | EP 0 073 859 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Method for building a building structure and pile framework therefor |
| (57) In constructing a building structure (1) each girder (4) is positioned on a pile
by means of a pile cap-member (5) having on its underside a metal plate which is welded
to an accurately or not accurately positioned metal top end (3) of a pile (2). |
[0001] The invention relates to a method of constructing a building, for example, premises, a bridge, a pier or viaduct, said building comprising at least one pile having a metal upper end and at least one prefabricated concrete girder, which bears on the pile with the interposition of a pile cap-member.
[0002] Such a method is known. Herein the pile cap-member is secured, for example, bolted to a specially designed top end of a pile concerned. This method is time-consuming and circuitous, particularly when the top end of the pile, for example, a driven pile is not exactly in the prescribed position.
[0003] The invention provides a method improved in this respect in that the pile cap member is prefabricated, to which a metal connecting frame is moulded, whilst the pile cap-member is set on the pile in its required position and in that subsequently the connecting frame is welded to the top end.
[0004] In this method the pile cap-member can be readily and firmly fastened to the top end of the pile independently of the divergences from the prescribed position of said top end.
[0005] The invention furthermore relates to and provides a pile cap-member for use in the method embodying the invention, said pile cap-member being characterized in that it is prefabricated of reinforced concrete having a metal connecting frame, to which reinforcing metal elements are welded.
[0006] The above-mentioned and further features of the invention will be described more fully with reference to the drawing.
[0007] The drawing shows in:
Figure 1 a vertical sectional view of a fraction of a building structure having a pile cap-member embodying the invention,
Figure 2 a vertical sectional view of a pile cap-member embodying the invention as shown in Figure 1,
Figure 3 on an enlarged scale detail III of Figure 1,
Figure 4 a sectional view taken on the line IV-IV of Figure 1,
Figure 5 a perspective view of a fraction of a different building structure constructed by the method embodying the invention,
Figure 6 a side elevation of a fraction of a further building structure constructed by the method embodying the invention,and
Figures 8, 9 and 10 on an enlarged scale various details of pile cap-members embodying the invention.
[0008] The building structure 1 constructed by carrying out the method embodying the invention comprises a plurality of piles 2, only one of which is shown in Figure 1. This pile 2 has a metal top end 3, since it is formed, for example completely by a round steel tubing. As shown in Figure 1, two prefabricated girders 4 of reinforced concrete bear on the top end 3 with the interposition of a pile cap-member 5. The pile-cap member 5 is prefabricated from reinforced concrete 6 having a metal connecting frame 7 formed integrally thereto, to which reinforcing metal elements 8 are fastened. The connecting frame 7 is constructed in the form of a plate having a thickness a.(Figure 7) such that the carrying capacity K is distributed across a sufficiently large surface b on the concrete 6. As the case may be, washer plates 9 may be arranged between the girders 4 and the pile cap-member 5. After the pile cap-member 5 is arranged on the pile 2 in the required position, the connecting frame 7 is welded to the top end 3. As is shown in Figure 4, the connecting frame 7 is proportioned so that it can be welded in various eccentric positions 10, 11, 12 or 13 to the top end 3 by a weld 14, which is important in the case of inaccurate disposition of the top end 3 relative to a prescribed position.
[0009] The connecting frame is secured by anchors 15 to the concrete 6. These anchors 15 have round heads 16 (Figures 1 to 5) and bent-over screw-threaded ends 17 (Figures 8 to 10) and are each welded to the connecting frame 7. As is shown in Fiqure 1, a concrete floor 18 is poured onto the girders 4 and anchored to the pile cap-member 5 by protruding reinforcing elements 19. One, two, three or four girders 4 may bear on one pile cap-member 5.
[0010] As is shown in Figure 5, each pile cap-member 21 constitutes together with a concrete girder 20 a monolithic, prefabricated concrete element 23. Each pile cap-member 21 has a connecting frame 27 formed by a plate covering approximately half of the top end 3. The two connecting frames 27 are welded to the top end 3 and, as the case may be, to one another.
[0011] As is shown in Figure 6, each girder 26 bears on a top end 3 by a pile cap-member 25 integrally formed to only one end of it, whereas the other end 28 bears on a pile cap-member 25of a further girder 26. Again a connecting frame 7 is secured by a weld 14 to the top end 3.
1. A method of constructing a building structure (1), for example, a building, bridge,
pier or viaduct, said building structure comprising at least one pile (2) having a
metal top end (3) and at least one prefabricated concrete girder (4) bearing on the
pile (2) with the interposition of a pile cap-member (5), characterized in that the
pile cap-member (5, 21) is prefabricated whilst a metal connecting frame (7) is integrally
formed thereto, in that the pile cap-member (5) is disposed on the pile (2) in its
required position and in that subsequently the connecting frame (7) is welded to the
top end (3).
2. A pile cap-member (5, 21) for use in the method claimed in Claim 1, characterized
in that it is prefabricated from reinforced concrete with a metal connecting frame
to which reinforcing metal elements (8) are welded.
3. A pile cap-member (21, 25) as claimed in Claim 2, characterized in that together
with a concrete girder (20, 26) it constitutes a monolithic, concrete, prefabricated
element (23) (Figure 5).
4. A pile cap-member (5) as claimed in Claim 2 or 3, characterized in that the connecting
frame (7) is constructed in the form of a plate.
5. A pile cap-member as claimed in Claim 2, 3 or 4, characterized in that the connecting
frame (7) is proportioned so that it can distribute the pressure forces (K) from a
pile (2) to the concrete (6) of a pile cap-member (5).
6. A pile cap-member (5) as claimed in Claim 2, 3, 4 or 5, characterized in that the
connecting frame (7) is proportioned so that it can transfer the tractive forces (Q)
from a pile (2) to the anchors (15) welded to the connecting frame (7).
7. A pile cap-member (5) as claimed in anyone of the Claims 2 to 6, characterized
in that the connecting frame (7) and the reinforcing elements (19) of the pile cap-member
(5) are proportioned so that the shear forces can be transferred from a pile to the
anchors (15) welded for this purpose to the connecting frame (7).
1. A method of constructing a building structure (1), for example, a building, bridge,
pier or viaduct, said building structure comprising at least one pile (2) having a
metal top end (3) and at least one prefabricated concrete girder (4) bearing on the
pile (2) with the interposition of a pile cap-member (5), characterized in that the
pile cap-member (5, 21) is prefabricated whilst a metal connecting frame (7) is integrally
formed thereto said connecting frame (7) having an oversize for compensating relative
position differences between the pile cap-member (5, 21) and the top end (3) of the
pile (2), in that independent of the position of the top end (3) of the pile (2) the
pile cap-member (5) is disposed on the pile (2) in its required position and in that
subsequently the connecting frame (7) is welded to the top end (3).
2. A pile cap-member (5, 21) for use in the method claimed in Claim 1, characterized
in that it is prefabricated from reinforced concrete with a metal connecting frame
to which reinforcing metal elements (8) are welded.
3. A pile cap-member (21, 25) as claimed in Claim
2, characterized in that together witn a concrete girder (20, 26) it constitutes a
monolithic, concrete, prefabricated element (23) (Figure 5).
4. A pile cap-member (5) as claimed in Claim 2 or 3, characterized in that the connecting
frame (7) is constructed in the form of a plate.
5. A pile cap-member as claimed in Claim 2, 3 or 4, characterized in that the connecting
frame (7) is proportioned so that it can distribute the pressure forces (K) from a
pile (2) to the concrete (6) of a pile cap-member (5).
6. A pile cap-member (5) as claimed in Claim 2, 3, 4 or 5, characterized in that the
connecting frame (7) is proportioned so that it can transfer the tractive forces (Q)
from a pile (2) to the anchors (15) welded to the connecting frame (7).
7. A pile cap-member (5) as claimed in anyone of the Claims 2 to 6, characterized
in that the connecting frame (7) and the reinforcing elements (19) of the pile cap-member
(5) are proportioned so that the shear forces can be transferred from a pile to the
anchors (15) welded for this purpose to the connecting frame (7).