JP5699015B2 - Steel pile and structure joint structure - Google Patents

Description

  The present invention relates to a joint structure between a steel pile and a structure that has a structurally strong strength and can absorb and fix a construction error between the steel pile and a structure thereon.

2. Description of the Related Art Conventionally, as a joining structure between a steel pile and various structures, a structure in which a structure is joined through a reinforced concrete footing formed integrally with a steel pile is generally known.
For example, when joining structures on steel pipe piles that have been driven into the ground, in order to absorb construction errors, reinforcing bars are placed on the pile heads of the steel pipe piles, and concrete is poured into the formwork to create a reinforced concrete structure. The structure was joined to the steel pipe pile by fixing the structure to the root winding using anchor bolts embedded in the root winding or post-installed anchor bolts.

Moreover, the construction method of the steel column described in patent document 1 bolts a lower plate to the pile head end plate of the pile piled, and installs a connection bolt to the long hole of a lower plate so that a movement is possible. And the long hole of the upper plate provided in the lower part of the upper steel column is formed in the direction substantially orthogonal to the long hole of the lower plate, and the above-mentioned connecting bolt is inserted and fixed in the long hole of the upper plate. . These connecting bolts become anchor bolts and are screwed into the lower plate.
With this structure, the displacement of the pile core and the column core in the XY-axis direction can be easily corrected by the movement of the connecting bolt and the upper plate.

  Moreover, in the joint structure of the pile and the column described in Patent Document 2, a pile head side pile body having a pile head plate is welded to the upper end of the cast steel pipe pile, and the pile head plate and the lower part of the column are fixed. Join the column base plate with bolts and nuts. At that time, it is said that the construction error in the horizontal direction of the steel pipe pile can be absorbed by making each bolt insertion hole of the pile head plate and the column base plate a loose hole.

JP 2004-132120 A JP 2006-193955 A

However, in the joint structure of the above-described conventional steel pipe pile and a structure such as a column, there is a drawback that the construction period is prolonged because concrete work is required at the joint.
In addition, the joint structure described in Patent Document 1 has a disadvantage that the number of components is large and complicated. Moreover, in the joining structure described in Patent Document 2, a steel pipe pile is placed at a construction site, and a pile head side pile body having a pile head plate is welded to the structure, such as a column base plate. It is possible to omit the process of placing concrete, but steel pipe piles and structures are manufactured at the factory, and the head of the steel pipe pile is cut at the site or pile head side pile body. The process of assembling by welding is necessary, and there is a drawback that the plating is peeled off by cutting or welding the steel pipe pile head. For this reason, there is a problem that it takes time and labor for joining, such as an on-site welding process and a re-plating process, and the cost remains high.

  In view of these problems, the present invention absorbs the relative positional deviation of steel piles without requiring on-site welding or plating, and easily and easily joins the structure. An object of the present invention is to provide a steel pile-structure joint structure that can be made.

A steel pile and structure joint structure according to the present invention is a joint structure for joining a steel pile and a structure, and is provided in a structure of a nut portion provided in a head portion of the pile. The first connecting plate and the second connecting plate, which are provided between the connecting portion and the head portion of the pile and the connecting portion of the structure and in which the first loose hole is formed, are formed integrally with each other. A second loose hole is formed in the joint or the second connecting plate, and the first connecting plate is connected to the head of the pile by the first bolt and the nut through the first loose hole. In addition, the second connecting plate and the connecting portion are connected by a second bolt and a nut through a second loose hole, and the nut portion is a female screw portion formed in a bolt insertion hole provided in the head of the pile. It is characterized by being.
According to the present invention, even if the head of the steel pile and the structure are relatively displaced, the first connection plate of the connection block provided between the head of the pile and the structure The first loose hole provided in the first connection plate of the connection block by adjusting the position by the first loose hole formed in the second connection plate of the connection block or the second loose hole formed in the joint portion of the structure. Join the hole through the first bolt to the nut at the head of the pile, and connect the nut through the second bolt to the second loose hole provided in one of the joint and the second connection plate and the bolt through hole provided in the other By doing so, the positional deviation between the head of the pile and the structure can be absorbed and fixed.
In addition, since the joint portion of the structure and the steel pile are indirectly joined via the connecting block whose position can be adjusted, it is possible to join the joints easily and in a short time without the need for on-site welding or re-plating.
In particular, a first loose hole and a second loose hole are provided in the first and second connection plates facing each other of the connection block, respectively, and the first connection plate is joined to the head of the pile by bolts and nuts. If the connecting plate is joined to the joint portion of the structure with bolts and nuts, it can be joined with a single component more easily and in a short time. Moreover, by fixing the nut so as to communicate with the bolt insertion hole on the back side of the head of the pile, the first bolt can be easily and easily screwed into the nut portion and fixed.
The joint portion of the structure may be integrated with the structure or may be separate.

The steel pile-structure joint structure according to the present invention is a joint structure for joining a steel pile and a structure, and is provided in a nut portion provided on the head of the pile and the structure. Formed integrally between the first connecting plate and the second connecting plate, which are provided between the formed connecting portion and the head portion of the pile and the connecting portion of the structure and in which the first loose hole is formed. A second loose hole is formed in the joint or the second connection plate, and the first connection plate is connected to the head of the pile by the first bolt and the nut through the first loose hole. While connecting, the 2nd connection plate and the joined part are connected with the 2nd bolt and the nut via the 2nd loose hole, The above-mentioned nut part was formed in the bolt penetration hole provided in the head of the above-mentioned pile It is a female screw part.
By forming a female screw part in the bolt insertion hole provided in the head of the pile to form a nut part, the number of parts can be further reduced, and the first connection plate can be further joined by screwing with the first bolt. It becomes easy.

Moreover, it is preferable that the 1st loose hole is formed in the center of the 1st connection plate of a connection block.
With this structure, it is possible to easily fix the bolt through the first loose ball of the first connecting plate by screwing it into the nut portion provided on the head of the pile and adjusting the position and angle.

Moreover, it is preferable that a connection block is made into a square cylinder shape and the 1st connection plate and the 2nd connection plate were provided facing the lower surface and upper surface of a connection block.
Alternatively, the connecting block has a rectangular tube shape, the first connecting plate and the second connecting plate are provided to face the lower surface and the upper surface of the connecting block, and the second connecting plate is formed with a notch portion with a central portion cut away. And the 2nd loose hole may be formed in the collar part of the both sides.
Since the first connecting plate and the second connecting plate are provided on the lower surface and the upper surface facing each other in a rectangular tube shape, the head of the pile and the structure can be joined to each other by one member.

A deformable spacer may be fitted between the joint portion of the structure and the second connection plate of the connection block.
By providing a spacer between the joint part of the structure and the second connection plate of the connection block, it is possible to easily absorb any misalignment in the height direction, and the head of the pile and the structure Even if one of them is inclined with respect to the other, by interposing the spacer, the inclination can be absorbed by the deformation of the spacer, the shape of the spacer, or the like.

Further, the joint portion of the structure may be a receiving portion that supports the structure. In this case, the structure and the connecting block are connected via the receiving portion, so that the number of parts increases, but the connecting structure The degree of freedom increases.

According to the joining structure of a steel pile and structure according to the present invention, the steel is made by a connecting block fixed between the pile and the structure without requiring a welding or plating process in the field. The positional deviation between the piles and the structure can be absorbed and the bolts can be joined to each other easily and in a short time. Thereby, the construction error of a steel pile or a structure is easily absorbed, and a high fixing strength between the steel pile and the structure can be obtained in a short construction period.
Moreover, since the pile and the structure can be fixed by the connecting block, the number of parts can be reduced and the manufacturing cost can be reduced.

It is principal part explanatory drawing which shows the joining structure of the steel pipe pile and solar cell panel mount by 1st embodiment of this invention. It is the principal part enlarged view which looked at the junction structure of a steel pipe pile and a mount frame from the direction orthogonal to the direction shown in FIG. It is a top view of the connection block shown in FIG. It is a principal part expanded sectional view of the joining structure of the steel pipe pile shown in FIG. It is a top view of the connection block shown in FIG. It is a figure which shows a steel pipe pile, (a) is a head top view, (b) is a partial longitudinal cross-sectional view of the head vicinity. It is a perspective view of a connection block. The modification of the steel pipe pile in the joining structure of a steel pipe pile and a mount is shown, (a) is a head top view, (b) is a partial longitudinal cross-sectional view near the head. It is principal part explanatory drawing which shows the joining structure of the steel pipe pile and solar cell panel mount by 2nd embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it is needless to say that the present invention is not limited to the following embodiments.
First, the joining structure according to the first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1, the joining structure 1 according to the first embodiment is such that a frame 2 for supporting a large number of solar cell panels (not shown) of a solar cell device is supported by a steel pipe pile 3 via a connection block 4. Yes.
The solar cell mount 2 is provided with a support frame 5 formed in a substantially V shape at a predetermined interval on the lower side thereof, and the support frame 5 is connected to a receiving portion 10 fixed to the connection block 4.

As shown in FIG.1 and FIG.2, the steel pipe pile 3 is driven in the ground, and the head 3a of the steel pipe pile 3 is extended on the ground. As shown in FIGS. 2 and 6, the steel pipe pile 3 is formed in, for example, a substantially cylindrical shape, and the opening of the head 3 a is sealed with a disk-shaped pile head surface 6. As shown in FIG. 6, a bolt insertion hole 6a is drilled substantially coaxially with the center line O of the pile head surface 6, and a nut 7 is welded to the back surface of the pile head surface 6 coaxially with the bolt insertion hole 6a. Pre-fixed.
Moreover, the protrusion part 8 for press-fitting while rotating the steel pipe pile 3 is provided in the outer peripheral surface of the head 3a of the steel pipe pile 3. As shown in FIG.

Next, the connection block 4 arrange | positioned between the steel pipe pile 3 and the mount frame 2 for solar cells is demonstrated.
The connection block 4 shown in FIG. 2 is formed in a substantially rectangular tube shape as shown in FIG. 7, and a lower surface plate 4a and an upper surface plate 4b are provided on the lower surface and the upper surface thereof to face each other. A first long hole 12 is formed in the bottom plate 4a as a loose hole in the center. The steel pipe pile 3 and the connection block 4 can be fixed by inserting the fastening bolt 13 through the first long hole 12 into the bolt insertion hole 6 a formed in the pile head surface 6 of the steel pipe pile 3 and tightening the nut 7.
Here, the extending direction of the first long hole 12 in the lower surface plate 4a is set as the Y-axis direction, and the position of the connecting block 4 with respect to the steel pipe pile 3 can be adjusted in the Y-axis direction. The connecting block 4 can be rotated and adjusted around the fastening bolt 13 inserted through the bolt insertion hole 6 a through the first long hole 12, and the angle in the horizontal plane of the connecting block 4 with respect to the steel pipe pile 3 can be adjusted.
A washer 14 and a spring washer 15 are interposed between the head of the fastening bolt 13 and the first long hole 12 of the lower surface plate 4a.

  Next, in FIG. 7, second long holes 16 are formed in, for example, the four corners of the upper surface plate 4 b facing the lower surface plate 4 a of the connection block 4. The four second long holes 16 formed in the upper surface plate 4b are formed so as to extend in the X-axis direction perpendicular to the Y-axis direction in which the first long holes 12 extend. The position of the connecting block 4 can be adjusted relative to the receiving portion 10 that supports 5 in the X-axis direction.

On the other hand, as shown in FIGS. 2 and 4, the receiving portion 10 fixed to the upper surface plate 4 b of the connection block 4 fixes the support frame 5 that supports the solar cell mount 2.
The receiving part 10 is provided with an accommodating part 10b having a substantially U-shaped cross section for accommodating and fixing the substantially V-shaped support frame 5 at the center of a substantially plate-like fixing plate 10a. The accommodating part 10b is extended in the direction substantially orthogonal to the extending direction of the 2nd long hole 16 so that the 2nd long hole 16 provided in the upper surface plate 4b of the connection block 4 may be isolate | separated 2 each (refer FIG. 2). However, it may be provided so as to extend along the extending direction of the second long hole 16 instead. And the bolt through-hole 18 is each formed in the four corners of the fixed plate 10a in the position similar to the position of each 2nd long hole 16 of the upper surface plate 4b.

  Then, the fastening block 13 can be inserted into the second long hole 16 of the upper surface plate 4b and the bolt through hole 18 of the fixing plate 10a and tightened with the nut 19 to fix the connecting block 4 and the receiving portion 10. Further, the position of the connecting block 4 can be adjusted relative to the receiving portion 10 along the X-axis direction that is the longitudinal direction of the second long hole 16.

Further, between the upper plate 4b of the connecting block 4 and the fixing plate 10a of the receiving portion 10, for example, a rubber spacer 20 is interposed around the fastening bolt 13 to be mounted. It is possible to absorb the vertical construction error of the pile head surface 6 and the receiving portion 10 and to adjust the tilt error with respect to the horizontal plane.
The spacer 20 may be made of synthetic resin or metal, but is preferably made of rubber. The rubber spacer 20 is compressed and deformed between the upper surface plate 4b of the connecting block 4 and the receiving portion 10, so that even if there is an inclination error in the pile head surface 6 or the receiving portion 10, the rubber spacer 20 has a shape adapted to the inclined surface. Thus, the tilt error can be absorbed and the solar cell mount 2 can be stably and accurately held.
Further, a washer 21 that abuts against the second long hole 16 and the bolt through hole 18 is interposed between the head of the fastening bolt 13 and the nut 19.

The joining structure 1 of the steel pipe pile 3 and the solar cell mount 2 according to the present embodiment has the above-described configuration, and the joining method will be described with reference to FIGS.
First, the steel pipe pile 3 is driven into the ground at a predetermined interval, and the connecting block 4 is installed on the pile head surface 6 provided on the head 3a. Then, the fastening bolt 13 is inserted into the first long hole 13 provided in the lower surface plate 4 a of the connection block 4 and the bolt insertion hole 6 a of the pile head surface 6, and is loosely screwed onto the nut 7 fixed to the back surface of the pile head surface 6. In combination, the position of the connecting block 4 is adjusted in the Y-axis direction, which is the longitudinal direction of the first long hole 13, with respect to the receiving portion 10 of the solar cell mount 2 to be connected. At the same time, the angle of the connecting block 4 in the horizontal plane can be adjusted.

Further, the position of the receiving portion 10 is adjusted in the X-axis direction so that the second long hole 16 provided in the upper surface plate 4 b of the connecting block 4 overlaps the bolt through hole 18 formed in the fixing plate 10 a of the receiving portion 10.
In this manner, the positions of the first long hole 12 and the second long hole 16 provided in the direction orthogonal to the lower surface plate 4a and the upper surface plate 4b of the connecting block 4 are adjusted in the Y-axis direction and the X-axis direction. The positional deviation of the steel pipe pile 3 with respect to the receiving portion 10 is adjusted by the connecting block 4 by adjusting the inner angle.

  Then, the bolts are respectively connected to the first long holes 12 of the lower surface plate 4a and the bolt insertion holes 6a of the pile head surface 6, the second long holes 16 of the upper surface plate 4b, and the bolt through holes 18 provided in the fixing plate 10a of the receiving portion 10. The receiving part 10 of the gantry 2 can be fixed to the steel pipe pile 3 by inserting 13 through the nut 7 and the nut 19.

As described above, according to the joint structure 1 of the steel pipe pile 3 and the solar cell mount 2 according to the present embodiment, the placement position of the steel pipe pile 3 is shifted with respect to the receiving portion 10 that supports the support frame 5 of the mount 2. Even if it adjusts, it adjusts to the Y-axis direction and X-axis direction which mutually orthogonally cross in a horizontal surface with the 1st long hole 12 of the lower surface plate 4a of the connection block 4, and the 2nd long hole 16 of the upper surface plate 4b, and a pile head surface By adjusting the rotation angle of the connecting block 4 in the horizontal plane around the bolt insertion hole 6a, the positional deviation can be absorbed and fixed.
Moreover, since one component called the connection block 4 should just be arrange | positioned as a member which connects the steel pipe pile 3 and the receiving part 10 of the mount frame 2, the number of parts can be reduced. Then, by simply screwing the fastening bolt 13 into the nuts 7 and 19 and tightening them, the position displacement of the steel pipe pile 3 can be absorbed easily and shortly without the need for on-site welding or plating processes. Can be joined to the gantry 2 in time.
Further, even if there is an error in the height direction or an inclination error between the steel pipe pile 3 and the gantry 2, it can be absorbed by interposing the spacer 20.
Thereby, even if there is a construction error of the steel pipe pile 3, the construction error can be easily absorbed and the steel pipe pile 3 and the mount 2 can be firmly and accurately fixed in a short construction period.

In addition, the joining structure 1 by this invention is not limited to the above-mentioned embodiment, As long as the summary of this invention is not changed, a suitable change can be employ | adopted.
FIG. 8 shows a first modification of the joint structure 1 of the steel pipe pile 3 and the solar cell mount 2 according to the first embodiment described above, and a nut 7 is fixed to the back surface of the pile head surface 6 of the steel pipe pile 3. Instead of the structure to be formed, an internal thread portion 22 that is screwed into the fastening bolt 13 may be formed in the bolt insertion hole 6a.
In the joint structure 1 according to the first embodiment described above, the angle is adjusted by rotating the lower surface plate 4a of the connection block 4 around the bolt insertion hole 6a in a horizontal plane with respect to the pile head surface 6 of the steel pipe pile 3. However, angle adjustment is not always necessary. In the lower surface plate 4 a and the upper surface plate 4 b, the fastening bolt 13 is inserted and connected to the nuts 7 and 19, and the steel pipe pile 3 and the receiving part 10 of the gantry 2 can be joined via the connection block 4.

The joint structure 1 of the steel pipe pile 3 and the solar cell mount 2 according to the second embodiment of the present invention will be described with reference to a cross-sectional view of the relevant part shown in FIG.
In the joining structure 1 shown in FIG. 9, the steel pipe pile 3 and the receiving part 10 are the substantially the same structures as 1st embodiment mentioned above, and differ in the structure of a connection block.
The connection block 24 shown in FIG. 9 has a configuration in which a cutout portion 25 is formed by cutting out the central portion of a substantially rectangular tube-shaped upper surface plate 24b, and the lower surface plate 24a is the connection block 4 according to the first embodiment described above. The first long hole 12 has the same configuration as the bottom plate 4 and extends in the Y-axis direction. In the upper surface plate 24b, substantially plate-like flange portions 26 are formed on both sides of the cutout portion 25, and a pair of second long holes 27 are formed in each flange portion 26, for example. The second long hole 27 is formed to extend in the X-axis direction substantially orthogonal to the extending direction of the first long hole 12.

A bolt through hole 18 is formed at a position facing the second long hole 27 in the fixed plate 10 a provided at the bottom of the receiving portion 10. Further, for example, a rubber spacer 20 may be mounted between the flange portion 26 of the upper surface plate 24b and the fixed plate 10a of the receiving portion 10.
Therefore, even when there is a displacement in the placement position of the steel pipe pile 3, the position adjustment in the Y-axis direction and the angle adjustment in the horizontal plane are performed by the first long hole 12 and the fastening bolt 13 of the lower surface plate 24a of the connection block 24. It can be carried out. Then, the position can be adjusted in the X-axis direction by the second long holes 27 formed in the flange portions 26 of the upper surface plate 24b, the bolt through holes 18 of the fixing plate 10a, and the fastening bolts 13.
Therefore, similarly to the joining structure 1 according to the first embodiment, even if a positional deviation occurs between the receiving portion 10 of the gantry 2 and the steel pipe pile 3, the position can be adjusted by the connecting block 24.

In addition, in each above-mentioned embodiment and modification, although the bolt insertion hole 18 formed in the fixing plate 10a of the receiving part 10 was formed in the cross-sectional circle shape, you may form in a long hole. Alternatively, a circular bolt insertion hole 18 is provided in the flange portion 26 of the upper surface plates 4b and 24b of the connection blocks 4 and 24 in place of the second elongated hole 27, and the bolt insertion hole 18 is replaced in the fixing plate 10a of the receiving portion 10. The second long hole 27 may be provided.
Further, in each of the above-described embodiments, the connecting blocks 4 and 24 are in the shape of a rectangular tube. You may form in.
Further, the connecting blocks 4 and 24 do not necessarily have a rectangular tube shape, and may be an integral structure in which the lower surface plates 4a and 24a and the upper surface plates 4b and 24b are connected, that is, one member, and the connecting structure is arbitrary. is there. For example, a non-square cylinder structure in which the lower surface plates 4a and 24a and the upper surface plates 4b and 24b are integrally connected by a member such as a column or a partition may be used. If the connection blocks 4 and 24 have such a configuration, the relative positional deviation between the steel pipe pile 3 and the cradle 10 of the gantry 2 can be adjusted and fixed by one member.
Further, the lower surface plates 4a and 24a of the connection blocks 4 and 24 constitute a first connection plate, and the upper surface plates 4b and 24b constitute a second connection plate. The first long hole 12, the second long holes 16, 27, etc. constitute a loose hole.

In each of the above-described embodiments, the spacer 20 is interposed between the connection blocks 4 and 24 and the fixed plate 10a. However, the spacer 20 is provided between the steel pipe pile 3 and the connection blocks 4 and 24. May be.
Moreover, in the above-mentioned embodiment, although the projection part 8 for rotationally press-fitting the steel pipe pile 3 in the head 3a of the steel pipe pile 3 was provided, the projection part 8 does not necessarily need to be provided. It is only necessary that the steel pipe pile 3 can be driven into the ground by some means such as placing by hydraulic pressure or pressing.
Moreover, in each embodiment mentioned above, although the solar cell mount 2 and the support frame 5 supported by the receiving part 10 were used as a structure joined to the steel pipe pile 3, this invention is limited to the solar cell mount 2 grade | etc.,. Needless to say, the present invention can be applied to various structures. Moreover, although the receiving part 10 was formed separately from the structure as a joint part of the structure, it may be formed integrally with the structure.
Also, the pile need not be the steel pipe pile 3, and an appropriate cross-sectional shape can be adopted.

DESCRIPTION OF SYMBOLS 1 Joining structure 2 Solar cell mount 3 Steel pipe piles 4, 24 Connection block 4a, 24a Bottom plate 4b, 24b Top plate 6 Pile head surface 6a Bolt insertion hole 7, 19 Nut 10 Receiving part 10a Fixing plate 10b Housing part 12 First Long hole 13 Fastening bolts 16 and 27 Second long hole 18 Bolt through hole 20 Spacer 22 Female thread part 26 Gutter part

Claims (7)

A joining structure for joining a steel pile and a structure,
A nut provided on the head of the pile;
A joint provided in the structure;
A connection block that is provided between the head of the pile and the joint of the structure and is formed integrally with a first connection plate and a second connection plate that face each other and in which a first loose hole is formed. And
A second loose hole is formed in the joint or the second connecting plate;
The first connecting plate is connected to the head of the pile by a first bolt and a nut through the first loose hole, and the second connecting plate and the joint are connected to the head through the second loose hole. Connected by two bolts and nuts ,
The said nut part is a nut currently fixed to the back surface side of the bolt insertion hole formed in the head part of the said pile, The joining structure of steel piles and structures characterized by the above-mentioned. A joining structure for joining a steel pile and a structure,
A nut provided on the head of the pile;
A joint provided in the structure;
A connection block that is provided between the head of the pile and the joint of the structure and is formed integrally with a first connection plate and a second connection plate that face each other and in which a first loose hole is formed. And
A second loose hole is formed in the joint or the second connecting plate;
The first connecting plate is connected to the head of the pile by a first bolt and a nut through the first loose hole, and the second connecting plate and the joint are connected to the head through the second loose hole. Connected by two bolts and nuts ,
The said nut part is the internal thread part formed in the volt | bolt insertion hole provided in the head of the said pile, The joining structure of steel piles and structures characterized by the above-mentioned. The said 1st loose hole is the joining structure of the steel pile and structure described in Claim 1 or 2 currently formed in the center of the 1st connection plate of the said connection block. The steel according to any one of claims 1 to 3, wherein the connection block has a rectangular tube shape, and the first connection plate and the second connection plate are provided to face a lower surface and an upper surface of the connection block. Of piles and structures. The connection block has a rectangular tube shape, the first connection plate and the second connection plate are provided to face the lower surface and the upper surface of the connection block, and the second connection plate is formed with a notched portion with a central portion cut away. And the joining structure of the steel pile and structure described in any one of Claim 1 to 3 by which the said 2nd loose hole is formed in the collar part of the both sides. The steel pile and structure according to any one of claims 1 to 5 , wherein a deformable spacer is fitted between the joint portion of the structure and the second connection plate of the connection block. Bonding structure. The joint structure of the steel pile and structure according to any one of claims 1 to 6 , wherein the joint portion of the structure is a receiving portion that supports the structure.

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