JP2022013850A - Joining method of pile and beam-column connection assembly and joining structure of pile and beam-column connection assembly - Google Patents

Abstract

To provide a joining method of a pile and a beam-column connection assembly which can suppress increase in the size of a footing size using a beam-column connection assembly having a steel pipe of a footing.SOLUTION: A joining method of a pile 30 and a beam-column connection assembly 10 includes: preparing a beam-column connection assembly 10 having a first steel pipe 16 opened downward; installing a second steel pipe 20 so as to surround a pile head 32 of the pile 30; installing the beam-column connection assembly 10 at a predetermined position so that the lower part of the first steel pipe 16 enters to the inside of the second steel pipe 20; filling the inside of the second steel pipe 20 and the inside of the first steel pipe 16 which are arranged at at least a predetermined gap D with the pile head 32 with a curable filler; and integrating the pile head 32 and the beam-column connection assembly 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method of joining a pile and a beam-column joint assembly used for a foundation of a building or the like, and a joining structure of a pile and a beam-column joint assembly.

As a steel foundation method, there is a building in which a foundation beam is constructed on a pile via footing. The construction of footing was generally reinforced concrete construction in which reinforcements were arranged at the site, formwork was provided, and concrete was placed, but in recent years, a joint structure of piles and foundation beams as disclosed in Patent Document 1 has been established. Have been proposed in large numbers.

In the joint structure of Patent Document 1, a steel pipe previously joined to a steel column and a foundation beam is arranged around a pile head, and then concrete is filled in the steel pipe to construct a footing. According to the joint structure of Patent Document 1, it is expected that the reinforcement arrangement work for footing and the temporary installation / removal work of the formwork at the construction site can be omitted, and the construction work can be significantly shortened and the foundation work can be shortened. can. Further, by using the footing in which the inside of the steel pipe is filled with concrete, this joint structure is excellent in the horizontal bearing capacity that acts on the building in the event of an earthquake or the like.

Japanese Unexamined Patent Publication No. 7-266568

However, since the steel pipe of Patent Document 1 is manufactured in advance in a steel frame factory with a column and a foundation beam, when the eccentricity of the pile or the vertical deviation occurs due to a construction error, the pile head and the footing are separated from each other. The edge size and the embedding depth of the pile will change. If the design is made in anticipation of a decrease in these dimensions, it is necessary to design a large footing dimension and steel pipe thickness, and as a result, interference between the footing and the EV pit or the like is likely to occur.

Therefore, the present invention relates to a method of joining a pile and a column-beam joint assembly and a method of joining a pile and a beam-column structure, which can suppress an increase in the footing size while using a column-beam joint assembly provided with a steel pipe for footing. It is an object of the present invention to provide a joint structure of a mouth assembly.

The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following aspects or application examples.

[1] One aspect of the method of joining a pile and a beam-column joint assembly according to the present invention is
Prepare a beam-column assembly with a first steel pipe that opens downwards,
Install a second steel pipe so as to surround the pile head of the pile,
The column-beam joint assembly is installed at a predetermined position so that the lower portion of the first steel pipe enters the inside of the second steel pipe.
The inside of the second steel pipe and the inside of the first steel pipe arranged at least at a predetermined distance from the pile head are filled with a curable filler to form the pile head and the beam-column joint assembly. It is characterized by being integrated.

[2] In one aspect of the method of joining the pile and the beam-column joint assembly,
The beam-column assembly comprises a steel beam bracket extending horizontally from the first steel pipe and joined to the foundation beam.
The first steel pipe includes an upper upper steel pipe and a lower steel pipe that protrudes downward from the lower end of the beam bracket and is continuous downward from the upper steel pipe.
The height of the second steel pipe can be made lower than the height of the lower steel pipe.

[3] In one aspect of the method of joining the pile and the beam-column joint assembly,
The lower steel pipe includes a plurality of headed studs that project horizontally from the outer peripheral surface of the lower steel pipe.
The second steel pipe may include a plurality of headed studs that project horizontally from the inner peripheral surface of the second steel pipe.

[4] In one aspect of the method of joining the pile and the beam-column joint assembly,
The first steel pipe includes a plurality of plate-shaped first plates that protrude horizontally from the outer peripheral surface of the first steel pipe and extend in the vertical direction.
The second steel pipe has a plurality of plate-shaped second plates protruding horizontally from the inner peripheral surface of the second steel pipe at positions corresponding to at least a part of the first plate and extending in the vertical direction. Prepare,
After installing the column-beam joint assembly in a predetermined position, at least a part of the first plate is joined to the second plate, and then the inside of the second steel pipe and the first steel pipe are joined. The curable filler can be filled inside the above.

[5] One aspect of the joint structure of the pile and the beam-column joint assembly according to the present invention is
A column-beam joint assembly with a first steel pipe joined via a pile head and a curable filler.
A second steel pipe that is around the first steel pipe in a plan view and is joined to the first steel pipe via a curable filler.
Equipped with
The second steel pipe is characterized in that it is arranged at least at a predetermined interval with respect to the pile head.

[6] In one aspect of the joint structure of the pile and the beam-column joint assembly according to the present invention.
The first steel pipe includes a plurality of plate-shaped first plates that protrude horizontally from the outer peripheral surface of the first steel pipe and extend in the vertical direction.
The second steel pipe has a plurality of plate-shaped second plates protruding horizontally from the inner peripheral surface of the second steel pipe at positions corresponding to at least a part of the first plate and extending in the vertical direction. Prepare,
At least a part of the plurality of the first plates and the plurality of the second plates can be joined.

According to one aspect of the method of joining the pile and the beam-column joint assembly and one aspect of the joining structure of the pile and the beam-column joint assembly according to the present invention, the predetermined edge dimension is maintained by the second steel pipe. Therefore, it is possible to suppress an increase in the footing size formed by the first steel pipe.

FIG. 2 is a cross-sectional view taken along the line AA in FIG. 2 of the joint structure according to the present embodiment. It is a top view of the joint structure which concerns on this embodiment. It is a figure explaining the joining method which concerns on this embodiment. It is a figure explaining the joining method which concerns on this embodiment. It is a figure explaining the joining method which concerns on this embodiment. It is a figure explaining the relationship between a pile and a 2nd steel pipe. It is a figure explaining the relationship between a pile and a 2nd steel pipe. It is sectional drawing of the joint structure which concerns on modification 1. FIG. It is sectional drawing of the joint structure which concerns on modification 2. FIG. FIG. 11 is a cross-sectional view taken along the line BB in FIG. 11 of the joint structure according to the modified example 3. It is a top view of the joint structure which concerns on modification 3. FIG. FIG. 3 is a cross-sectional view taken along the line CC in FIG. 13 of the joint structure according to the modified example 4. It is a top view of the joint structure which concerns on modification 4. FIG. It is a top view of the joint structure which concerns on modification 4. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unreasonably limit the content of the present invention described in the claims. Moreover, not all of the configurations described below are essential constituent requirements of the present invention.

One aspect of the method of joining the pile and the beam-column joint assembly according to the present embodiment is to prepare a beam-column joint assembly having a first steel pipe that opens downward so as to surround the pile head of the pile. The second steel pipe is installed, the beam-column joint assembly is installed at a predetermined position so that the lower portion of the first steel pipe enters the inside of the second steel pipe, and the column and beam joint assembly is installed at a predetermined position at least at a predetermined distance from the pile head. The inside of the second steel pipe and the inside of the first steel pipe are filled with a curable filler to integrate the pile head and the beam-column joint assembly.

Further, one aspect of the joint structure of the pile and the beam-column joint assembly according to the present embodiment is a beam-column joint assembly provided with a first steel pipe joined to the pile head of the pile via a curable filler. A second steel pipe that is around the first steel pipe and is joined to the first steel pipe via a curable filler, and the second steel pipe is at least predetermined with respect to the pile head. It is characterized by being arranged at intervals of.

1. 1. Joining Structure With reference to FIGS. 1 and 2, a joining structure (hereinafter referred to as “joining structure 1”) of a pile 30 and a beam-column joint assembly 10 according to an embodiment of the present invention will be described. FIG. 1 is a sectional view taken along the line AA in FIG. 2 of the joint structure 1 according to the present embodiment, and FIG. 2 is a plan view of the joint structure 1 according to the present embodiment.

As shown in FIGS. 1 and 2, the joint structure 1 includes a column-beam joint assembly 10 including a pile head 32 of a pile 30 and a first steel pipe 16 joined via a first curable filler 166. A second steel pipe 20 that is located around the first steel pipe 16 in a plan view and is joined to the first steel pipe 16 via a second curable filler 22 is provided.

The joint structure 1 can be adopted, for example, as a foundation structure of a building whose upper structure is a steel structure and is supported by a pile foundation. The superstructure is not limited to steel structures such as aluminum structures, wooden structures, and composite structures of steel frames and wood. Such a building is, for example, a medium-low-rise building having a relatively large floor area and requiring a short construction period, and specifically, it can be applied to a medium-sized commercial facility, an office, an apartment house, or the like. ..

The pile 30 is a columnar structural member buried in the ground for transmitting the load of the structure to the ground. The pile 30 includes, for example, a reinforced concrete pile, a steel pipe pile, and the like in terms of materials. The pile 30 includes, for example, a driving pile, a cast-in-place pile, and an embedded pile from the construction surface. The top of the pile 30 is the pile head 32, and the pile head 32 is the ground surface, for example, level concrete 4.
It protrudes from 0. If the planar position of the pile 30 and the height Hc (pile head level) of the pile head 32 are not constructed as designed, a slight construction error may occur.

The beam-column joint assembly 10 includes a column 12, a beam bracket 14, and a first steel pipe 16. The column-beam joint assembly 10 is manufactured in advance at a steel frame factory, for example, and brought to a construction site. Therefore, when the column-beam joint assembly 10 manufactured as designed is constructed on the pile 30 in which the eccentricity and the vertical deviation occur due to the construction error, the edge dimension between the pile head 32 and the first steel pipe 16 is formed. And the embedding depth of the pile may not be as designed.

The beam bracket 14 is a steel frame and extends outward in the horizontal direction from the first steel pipe 16 and has a free end joined to a foundation beam (not shown). Further, the beam bracket 14 extends inward in the horizontal direction to the column 12 inside the first steel pipe 16. In the present embodiment, the number of beam brackets 14 is four, but one or more may be used according to the shape of the foundation beam. The beam bracket 14 is, for example, H-shaped steel.

The column 12 is, for example, a square steel pipe or a circular steel pipe extending upward from the lower end of the beam bracket 14 beyond the upper end of the beam bracket 14. The pillar 12 may be used as a pillar bracket for connecting to the pillar body. The inside of the column 12 in the first steel pipe 16 is filled with the concrete 120 in the column. As the concrete 120 in the column, a curable filler described later may be used.

The first steel pipe 16 is, for example, a cylindrical steel pipe centered on a pillar 12. The first steel pipe 16 is not limited to a cylindrical shape, but may be a tubular shape capable of filling the inside of the steel pipe with a curable filler, which will be described later, and may be, for example, a square tubular shape or another polygonal tubular shape. Further, the first steel pipe 16 may be provided with a lid covering the upper surface as long as it has an opening for pouring the curable filler. The inside of the first steel pipe 16 is filled with the first curable filler 166 to form a footing that supports the column 12 and the beam on the pile head 32. The first curable filler 166 is provided on the pile head 32 by F. T. It may be joined to the pile head 32 via a known joining member such as a cap (registered trademark). The first steel pipe 16 includes an upper upper steel pipe 160 and a lower steel pipe 162 that projects downward from the lower end of the beam bracket 14 and is continuous downward from the upper steel pipe 160. The upper steel pipe 160 and the lower steel pipe 162 are described by dividing one steel pipe into two parts in order to explain the positional relationship with other members, but they are integrated. In order to improve the integrity of the first steel pipe 16 with the first curable filler 166, a shear key such as a headed stud protruding inward from the inner peripheral surface thereof may be installed.

In the upper steel pipe 160, the beam bracket 14 is passed through the four notches, and the ribs of the steel plate are welded so as to fill the notches to form a cylindrical outer shape. The height of the upper steel pipe 160 and the height of the beam bracket 14 are the same.

The lower steel pipe 162 has a cylindrical shape in which the upper end is continuous from the lower end of the upper steel pipe 160 and the lower end is open. The opening diameter of the lower steel pipe 162 is larger than the pile diameter of the pile head 32. At least as shown in FIG. 2, the pile head 32 is arranged inside the lower steel pipe 162 in a plan view. The height Ha of the lower steel pipe 162 is a height protruding downward from the lower end of the beam bracket 14.

The second steel pipe 20 is, for example, a cylindrical steel pipe having an inner diameter larger than the outer diameter of the first steel pipe 16 and is arranged around the lower steel pipe 162. The second steel pipe 20 is not limited to a cylindrical shape, but may be a tubular shape capable of filling the inside of the steel pipe with a curable filler, which will be described later, and may be, for example, a square tubular shape or another polygonal tubular shape. The second steel pipe 20 has a size capable of realizing at least the edge dimension and the embedding depth required for footing in relation to the pile head 32. For example, when the horizontal construction error of the pile 30 is small, the second steel pipe 20 may be installed based on the distance between the first steel pipe 16 and the lower steel pipe 162, and the horizontal construction error of the pile 30 may be large. If it is large, the second steel pipe 20 may be installed based on the distance D from the pile 30. If the construction error of the pile 30 is small, even if the second steel pipe 20 is installed at a constant interval with respect to the lower steel pipe 162, the edge dimension of the second steel pipe 20 with respect to the pile head 32 is within the design allowable range ( This is because it often falls within a predetermined interval D). If the distance between the second steel pipe 20 and the lower steel pipe 162 is constant, for example, a joining member between the second steel pipe 20 and the lower steel pipe 162 can be prepared in advance, and the workability at the site is improved. Further, when the construction error of the pile 30 is large, if the distance between the second steel pipe 20 and the lower steel pipe 162 is kept constant, a sufficient edge clearance may not be obtained, but the second steel pipe 20 and the pile head 32 may not be obtained. By keeping the distance D between the pile head and the pile head 32 constant, the edge dimension with respect to the pile head 32 can be set as designed. Further, the height Hb of the second steel pipe 20 is set so as to absorb an assumed construction error of the pile 30 in the vertical direction and realize an embedding depth satisfying a design allowable range. For example, even if the pile head 32 is constructed lower than the design position and the embedding depth in the lower steel pipe 162 is small, the second steel pipe 20 can be arranged at a position lower than the lower steel pipe 162. The embedding depth of the pile head 32 in the steel pipe 20 can be within the allowable range in design. The inside of the second steel pipe 20 is filled with the second curable filler 22 and integrated with the lower steel pipe 162. As a result, the lower portion of the footing where the bearing pressure from the pile 30 is maximized can be reinforced by the second steel pipe 20, so that the diameter and thickness of the first steel pipe 16 can be kept small while securing a space such as an EV pit.

The second steel pipe 20 is arranged with respect to the pile head 32 at least at a predetermined interval D. The predetermined spacing D is a horizontal spacing between the pile 30 and the second steel pipe 20 defined by design. For example, the predetermined interval D allows the pile 30 and the pile cap (first steel pipe 16 and concrete 120 in the column) to transmit the horizontal force during an earthquake from the superstructure of the building supported by the pile 30 to the pile 30. It can be the minimum size required to prevent damage to the connection. The predetermined interval D can be set in advance at the design stage according to the material, diameter, superstructure, etc. of the pile 30. In FIG. 2, the position indicated by the thick broken line of the pile 30 is directly below the column 12, which is the position as designed. Since the second steel pipe 20 can be moved to the position of the double broken line even if the second steel pipe 20 is displaced, the interval D can be made constant. Since the distance D between the second steel pipe 20 and the pile head 32 has the edge dimension as designed, the construction error of the pile 30 can be absorbed. That is, even if the edge dimension and the embedding depth of the pile head 32 and the first steel pipe 16 do not meet the design criteria due to a construction error of a part of the pile 30, the edge between the second steel pipe 20 and the pile head 32. The clearance size and embedding depth can always meet the design criteria. Therefore, by adopting the joint structure 1 having the second steel pipe 20, it is possible to suppress the increase in the footing size in consideration of the construction error of the pile 30. As described above, if the horizontal construction error of the pile 30 is small, the second steel pipe 20 may be arranged at a constant interval (concentric circle) with respect to the lower steel pipe 162, and the interval D may not be constant.

The first curable filler 166 and the second curable filler 22 have fluidity when filled inside the steel pipe, and after filling, the curable filler can be cured and integrated with the steel pipe. Can be adopted. As such a curable filler, for example, a cement-based filler such as concrete or mortar, a synthetic resin-based filler such as an epoxy resin or an acrylic resin, or the like can be adopted. In the present embodiment, it is preferable to use concrete as the first curable filler 166 and the second curable filler 22 from the viewpoint of strength and price.

The height Hb of the second steel pipe 20 is lower than the height Ha of the lower steel pipe 162. By keeping the height Hb of the second steel pipe 20 low, it is possible to secure a space such as an EV pit.

2. 2. Joining Method A joining method (hereinafter referred to as "joining method") between the pile 30 and the beam-column joint assembly 10 according to the present embodiment will be described with reference to FIGS. 1 to 7. 3 to 5 are views for explaining the joining method according to the present embodiment, and FIGS. 6 and 7 are views for explaining the relationship between the pile 30 and the second steel pipe 20. In FIGS. 3 and 5, (a) is a plan view, and (b) is a cross-sectional view seen from the side.

As for the joining method, the column-beam joint assembly 10 is prepared, the second steel pipe 20 is installed, the column-beam joint assembly 10 is installed, and the pile head 32 and the column-beam joint assembly 10 are integrated. Including the process. Hereinafter, each step will be described in order. The above-mentioned matters in the joining structure 1 will be omitted.

First, a column-beam joint assembly 10 provided with a first steel pipe 16 that opens downward in advance, for example, at a steel frame factory different from the construction site, is prepared. By preparing the column-beam joint assembly 10 in advance, it is possible to realize labor saving and shortening of the construction period in the foundation work because the steps of bar arrangement work for footing and the process of attaching and detaching the temporary formwork are not required.

Next, as shown in FIG. 3, at the construction site where the pile head 32 of the pile 30 is exposed on the level concrete 40, the second steel pipe 20 is installed so as to surround the pile head 32 of the pile 30. In FIG. 3, the broken line is the design position of the pile 30. Since the second steel pipe 20 is only temporarily installed, the distance D between the pile head 32 and the second steel pipe 20 does not have to be set to a predetermined distance as designed, but the second curable filler 22 is provided. Before filling, it is required to install the second steel pipe 20 at a horizontal position where the interval D has at least a predetermined interval as designed. At this time, depending on the magnitude of the construction error of the pile 30, it may be determined whether the interval D is constant or the second steel pipe 20 is constant interval with respect to the lower steel pipe 162.

Next, as shown in FIG. 4, the column-beam joint assembly 10 is suspended from above the pile head 32 by using a crane or the like (not shown) so that the lower part of the first steel pipe 16 enters the inside of the second steel pipe 20. The beam-column joint assembly 10 is lowered, and the beam-column joint assembly 10 shown in FIG. 5 is installed at a predetermined position. The position where the column-beam joint assembly 10 is installed is as designed because the distance from the adjacent column-beam joint assembly 10 (not shown) is fixed. Note that FIG. 4 is a side view showing the column-beam joint assembly 10 and the second steel pipe 20.

In FIGS. 4 and 5, the column-beam joint assembly 10 is displaced to the left side of each figure with respect to the pile 30, but the distance D between the pile head 32 and the second steel pipe 20 is D. Should be set at the same design position as in FIG. As shown in FIG. 5, before the second hardenerable filler 22 is filled inside the second steel pipe 20, the second steel pipe 20 is placed at a predetermined position with respect to the pile head 32 and then hardened. The first steel pipe 16 and the second steel pipe 20 may be fixed to each other for stability during filling of the filler. In the present embodiment, for example, a steel rod-shaped fixing member 24 is passed from the upper end of the second steel pipe 20 to the side surface of the lower steel pipe 162 and both ends are welded and fixed. The outer surface of the 162 and the inner surface of the second steel pipe 20 may be fixed with bolts or the like by a rib plate, or the second steel pipe 20 extends radially from the outer surface of the lower steel pipe 162 in advance at the factory according to the dimension of the pile center deviation. Both ends of a plurality of rib plates extending to the inner surface of the pipe may be welded and integrated before being carried into the construction site, or the lower end may be fixed with level concrete. Further, for example, in order to improve the integrity of the lower steel pipe 162, the second curable filler 22, and the second steel pipe 20, the lower steel pipe 162 has a plurality of heads protruding horizontally from the outer peripheral surface of the lower steel pipe 162. A stud 168 may be provided, and the second steel pipe 20 may include a plurality of headed studs 26 projecting horizontally from the inner peripheral surface of the second steel pipe 20. Further, instead of the headed studs 26 and 168, a steel material having another shape may be provided.

Finally, as shown in FIGS. 1 and 2, the inside of the second curable filler 22 and the inside of the first steel pipe 16 are inside the second steel pipe 20 arranged at least at a predetermined interval D with respect to the pile head 32. The first curable filler 166 is filled in the pile head 32 and the beam-column joint assembly 10 are integrated to obtain the joint structure 1. The first curable filler 166 can be poured from the upper end opening of the first steel pipe 16, and the second curable filler 22 can be poured from the gap with the first steel pipe 16 at the upper end opening of the second steel pipe 20. Further, the concrete 120 in the pillar is filled into the inside of the pillar 12 from the upper end opening of the pillar 12.

As described above, according to this joining method, the design arrangement is that the pile head 32 is located at the center in the plan view of the first steel pipe 16 shown in FIG. 1, but it is shown in FIG. 5 due to the construction error of the pile 30. Even when the pile head 32 is displaced in the horizontal direction, the distance D between the pile head 32 and the second steel pipe 20 can always be constant. For example, as shown in FIG. 6, even when the height Hc of the pile head 32 is higher than the design dimension, the pile head 32 is displaced in the horizontal direction due to the construction error of the pile 30. The distance D from the second steel pipe 20 is constant, and the height Hb of the second steel pipe 20 also ensures a predetermined embedding depth of the pile head 32. Further, for example, as shown in FIG. 7, even when the pile head 32 is displaced in the horizontal direction due to the construction error of the pile 30 and the height Hc of the pile head 32 is lower than the design dimension, the pile head 32 is not included. The distance D between the 32 and the second steel pipe 20 can be constant, and the height Hb of the second steel pipe 20 also secures a predetermined embedding depth of the pile head 32.

As described above, according to the joining method according to the present embodiment, the second steel pipe 20 can maintain a predetermined edge size and embedding depth, so that the footing size formed by the first steel pipe 16 can be increased. It can be suppressed. Space for EV pits and the like can be secured by suppressing the increase in footing size due to the increase in size of the first steel pipe 16.

3. 3. Modifications 1 and 2
A modification 1 and a modification 2 of the joint structure 1 according to the present invention will be described with reference to FIGS. 8 and 9. FIG. 8 is a cross-sectional view taken along the line AA of the joint structure 2 according to the modified example 1, and FIG. 9 is a cross-sectional view taken along the line AA of the joint structure 3 according to the modified example 2. The description overlapping with the joining structure 1 will be omitted. Further, the joint structures 2 and 3 according to the modified examples 1 and 2 may adopt at least a part of the configurations of the joint structures 4 and 5 according to the modified examples 3 and 4.

The joint structure 2 according to the modification 1 shown in FIG. 8 includes a plurality of headed studs 320 protruding outward in the horizontal direction from the pile head 32. By providing the headed stud 320 protruding from the pile head 32, it is possible to improve the yield strength of the footing against the pulling force.

The joint structure 3 according to the modification 2 shown in FIG. 9 includes an anchor member 322 extending upward from the center of the pile head 32. The anchor member 322 is fixed to the pile head 32 by filling the filling concrete 326 with the anchor member 322 inserted into the recess provided in the pile head 32. The anchor member 322 may include a plurality of headed studs 324 that project horizontally within the padded concrete 326. By providing the anchor member 322, it is possible to improve the yield strength of the footing against the pulling force.

4. Modifications 3 and 4
10 and 11 will be used to describe a modified example 3 of the bonded structure 4 according to the present invention, and FIGS. 12 to 14 will be used to describe a modified example 4 of the bonded structure 5 according to the present invention. 10 is a sectional view taken along line BB in FIG. 11 of the joint structure 4 according to the modified example 3, FIG. 11 is a plan view of the joint structure 4 according to the modified example 3, and FIG. 12 is a plan view of the joint structure 4 according to the modified example 4. 5 is a cross-sectional view taken along the line CC in FIG. 13, FIG. 13 is a plan view of the joint structure 5 according to the modified example 4, and FIG. 14 is a plan view of the joint structure 5 according to the modified example 4. In FIGS. 11, 13 and 14, the pile 30 is shown in white and the column 12 and the beam bracket 14 are omitted in order to make it easy to understand the positional relationship between the pile 30 and the second steel pipe 20. In the following description, the description overlapping with the joining structure 1 will be omitted. Further, the joint structures 4 and 5 according to the modified examples 3 and 4 may adopt at least a part of the configurations of the joint structures 2 and 3 according to the modified examples 1 and 2.

The joint structure 4 according to the modified example 3 shown in FIGS. 10 and 11 is different from the joint structure 1 according to the above embodiment in that the first steel pipe 16 and the second steel pipe 20 are joined to each other by a rib plate. The first steel pipe 16 includes a plurality of plate-shaped first plates 240 that project radially in the horizontal direction from the outer peripheral surface of the first steel pipe 16 (lower steel pipe 162 in the modified examples 3 and 4) and extend in the vertical direction. The second steel pipe 20 is a plate-shaped second plate 242 that protrudes horizontally from the inner peripheral surface of the second steel pipe 20 at a position corresponding to at least a part of the plurality of first plates 240 and extends in the vertical direction. Prepare multiple. At least a part of the plurality of first plates 240 and the plurality of second plates 242 are joined and integrated.

There are a plurality of first plates 240, for example, eight plates, and as shown in FIG. 12, the first plates 240 project outward at equal intervals in a radial pattern. The first plate 240 is made of, for example, a steel plate. One end of the first plate 240 is integrally fixed to the outer peripheral surface of the lower steel pipe 162 by welding, for example, and the other end extends close to the inner peripheral surface of the second steel pipe 20. The first plate 240 extends in the vertical direction so that, for example, the lower steel pipe 162 and the second steel pipe 20 overlap in the vertical direction, but has a height required for joining with the second plate 242. Just do it. All first plates 240 have, for example, the same size. The first plate 240 is formed with a plurality of adjusting holes 243 in the vertical direction. The adjusting hole 243 is a through hole through which the fixing bolt 244 is inserted, and for example, two rows are formed in the horizontal direction at four points in the vertical direction.

There are, for example, eight second plates 242 according to the number of the first plates 240, and as shown in FIG. 12, the second plates 242 project from the inner peripheral surface of the second steel pipe 20 at positions corresponding to the radially projecting first plates 240. .. By arranging a plurality of second plates 242 along the inner peripheral surface of the second steel pipe 20, the joint strength between the lower steel pipe 162 and the second steel pipe 20 can be improved. The second plate 242 is made of, for example, a steel plate. One end of the second plate 242 is integrally fixed to the inner peripheral surface of the second steel pipe 20 by welding, for example, and the other end extends close to the outer peripheral surface of the lower steel pipe 162. All second plates 242 have, for example, the same size. The second plate 242 has, for example, a vertical height from the upper end to the vicinity of the lower end of the second steel pipe 20. The second plate 242 is formed with a plurality of adjusting holes (not shown) in the vertical direction. The adjusting holes of the second plate 242 are through holes through which the fixing bolts 244 are inserted, and for example, two rows are formed in the horizontal direction at five points in the vertical direction.

In the joining method of the joining structure 4, after the column-beam joint assembly 10 described in 2 above is installed at a predetermined position, the first plate 240 and the second plate 242 are joined, and then the inside of the second steel pipe 20 is joined. The inside of the first steel pipe 16 is filled with the first curable filler 166 and the second curable filler 22 and integrated. By joining the first plate 240 and the second plate 242, the second steel pipe 20 used as a part of the footing can be reinforced. In the modified example 3, eight first plates 240 are joined to the second plate 242, but the present invention is not limited to this, and it is preferable to join the lower steel pipe 162 at three or more positions in the circumferential direction. In the example of FIGS. 10 and 11, the first plate 240 and the second plate 242 are aligned with the adjustment hole 243 by the adjustment hole (not shown) of the first plate 240, and then by the fixing bolt 244 and the nut 246. Can be joined. The method of joining the first plate 240 and the second plate may be, for example, welding. The vertical alignment of the adjusting hole is performed by sandwiching a level adjusting material under the second steel pipe 20, and the horizontal alignment of the adjusting hole is performed until the second plate 242 abuts on the first plate 240. 2 This is done by rotating the steel pipe 20 around the lower steel pipe 162. Further, one plate may be used instead of the set of two plates as shown in FIGS. 10 and 11. That is, both ends of a plurality of rib plates extending radially from the outer surface of the lower steel pipe 162 to the inner surface of the second steel pipe 20 at the factory in advance according to the dimensions of the pile core misalignment are welded and integrated before being integrated into the construction site. You may bring it in.

Further, depending on the joint strength, the adjusting hole 243 may be formed as an elongated hole extending in the vertical direction, in which case the vertical position adjustment of the second steel pipe 20 becomes unnecessary.

In the joint structure 4, the horizontal distance D1 between the lower steel pipe 162 and the second steel pipe 20 is constant, and the lower steel pipe 162 and the second steel pipe 20 are arranged concentrically. Since the interval D1 is constant, the first plate 240 and the second plate 242 having the protrusion lengths corresponding to the interval D1 can be attached to the lower steel pipe 162 and the second steel pipe 20 in advance at the factory, and the workability at the construction site is possible. Can be improved. In the examples of FIGS. 10 and 11, the pile 30 is located on the left side of each figure in the horizontal direction with respect to the column-beam joint assembly 10 due to the construction error of the pile 30, but the pile head 32 and the second steel pipe 20 Since the horizontal spacing D of the above has at least a predetermined spacing, the position of the second steel pipe 20 is not changed corresponding to the position of the pile head 32. Further, due to a construction error of the pile 30, the pile head 32 is located at substantially the same height as the lower end of the lower steel pipe 162 in the vertical direction. Therefore, the lower steel pipe 162 does not have the embedding depth of the pile 30. By arranging the second steel pipe 20 so as to extend vertically below the lower end of the lower steel pipe 162 while overlapping with the lower steel pipe 162 in the vertical direction, it is possible to secure the embedding depth required by design. ..

The joint structure 5 according to the modified example 4 shown in FIGS. 12 to 14 is different from the bonded structure 4 according to the modified example 3 in that the sizes of the first plate 240 and the second plate 242 are different. In the joint structure 4 according to the modified example 3, since all the second plates 242 have the same size, the interval D1 is constant over the entire circumference, but in the bonded structure 5 according to the modified example 4, the interval D1 is the entire circumference. It does not have to be constant. As a result, even if the construction error is large, the horizontal position of the second steel pipe 20 can be aligned with the position of the pile 30 and the interval D can be arranged so as to satisfy a predetermined interval.

The first plates 240 are all the same size, and for example, 16 plates are arranged radially at equal intervals. Not all the first plates 240 may be joined to the second plate 242, and eight may be fixed to the second plate 242 as in the fourth modification. By providing a larger number of the first plates 240 than the number of the second plates 242, the alignment of the second steel pipe 20 by rotation becomes easy.

The protruding length of the second plate 242 from the outer peripheral surface of the second steel pipe 20 is manufactured in the factory in advance according to the construction error of the pile 30. Therefore, at the construction site, the second steel pipe 20 is installed on the level concrete 40 according to the actual position of the pile 30, and when the column-beam joint assembly 10 is arranged at a predetermined position, the second steel pipe 20 is centered on the pile head 32. 2 The steel pipe 20 is rotated to bring the second plate 242 into contact with the first plate 240, and then the fixing bolt 244 and the nut 246 are used to join the second plate 242.

In the example of FIG. 13, the pile 30 is moved to the lower left of the figure due to a construction error. In the example of FIG. 14, the pile 30 is moved to the right side of the figure due to a construction error. In either case, if the degree of eccentricity of the pile 30 is the same, the second steel pipe 20 composed of the second plate 242 of the same length combination can be used, and the second steel pipe is aligned with the direction in which the pile 30 is eccentric. A predetermined interval D can be secured by adapting to the lower steel pipe 162 only by rotating 20.

The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the present invention includes configurations that are substantially identical to the configurations described in the embodiments (eg, configurations with the same function, method, and result, or configurations with the same purpose and effect). The present invention also includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. Further, the present invention includes a configuration having the same action and effect as the configuration described in the embodiment or a configuration capable of achieving the same object. Further, the present invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

1,2,3,4,5 ... Joint structure, 10 ... Column-beam joint assembly, 12 ... Column, 120 ... Concrete inside the column, 14 ... Beam bracket, 16 ... First steel pipe, 160 ... Upper steel pipe, 162 ... Lower steel pipe, 166 ... 1st curable filler, 168 ... Headed stud, 20 ... 2nd steel pipe, 22 ... 2nd curable filler, 24 ... Fixing member, 240 ... 1st plate, 242 ... 2nd plate, 243 ... Adjustment hole, 244 ... Fixing bolt, 246 ... Nut, 26 ... Headed stud, 30 ... Pile, 32 ... Pile head, 320 ... Headed stud, 322 ... Anchor member, 324 ... Headed stud, 326 ... Filling Concrete, 40 ... Level concrete, D, D1 ... Interval, Ha, Hb, Hc ... Height

Claims (6)

Prepare a beam-column assembly with a first steel pipe that opens downwards,
Install a second steel pipe so as to surround the pile head of the pile,
The column-beam joint assembly is installed at a predetermined position so that the lower portion of the first steel pipe enters the inside of the second steel pipe.
The inside of the second steel pipe and the inside of the first steel pipe arranged at least at a predetermined distance from the pile head are filled with a curable filler to form the pile head and the beam-column joint assembly. A method of joining a pile and a beam-column joint assembly, which is characterized by being integrated. In claim 1,
The beam-column assembly comprises a steel beam bracket extending horizontally from the first steel pipe and joined to the foundation beam.
The first steel pipe includes an upper upper steel pipe and a lower steel pipe that protrudes downward from the lower end of the beam bracket and is continuous downward from the upper steel pipe.
A method for joining a pile and a beam-column joint assembly, wherein the height of the second steel pipe is lower than the height of the lower steel pipe. In claim 2,
The lower steel pipe includes a plurality of headed studs that project horizontally from the outer peripheral surface of the lower steel pipe.
A method for joining a pile and a beam-column joint assembly, wherein the second steel pipe includes a plurality of headed studs that project horizontally from the inner peripheral surface of the second steel pipe. In any one of claims 1 to 3,
The first steel pipe includes a plurality of plate-shaped first plates that protrude horizontally from the outer peripheral surface of the first steel pipe and extend in the vertical direction.
The second steel pipe has a plurality of plate-shaped second plates protruding horizontally from the inner peripheral surface of the second steel pipe at positions corresponding to at least a part of the first plate and extending in the vertical direction. Prepare,
After installing the column-beam joint assembly in a predetermined position, at least a part of the first plate is joined to the second plate, and then the inside of the second steel pipe and the first steel pipe are joined. A method of joining a pile and a beam-column joint assembly, characterized in that the inside of the pile is filled with the curable filler. A column-beam joint assembly with a first steel pipe joined via a pile head and a curable filler.
A second steel pipe that is around the first steel pipe in a plan view and is joined to the first steel pipe via a curable filler.
Equipped with
The second steel pipe is a joint structure of a pile and a beam-column joint assembly, characterized in that the second steel pipe is arranged at least at a predetermined distance from the pile head. In claim 5,
The first steel pipe includes a plurality of plate-shaped first plates that protrude horizontally from the outer peripheral surface of the first steel pipe and extend in the vertical direction.
The second steel pipe has a plurality of plate-shaped second plates protruding horizontally from the inner peripheral surface of the second steel pipe at positions corresponding to at least a part of the first plate and extending in the vertical direction. Prepare,
A method for joining a pile and a beam-column joint assembly, characterized in that at least a part of the plurality of first plates and the plurality of second plates are joined.

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