JP2000104336A - Joint structure between pile and superstructure frame in structure and construction method of superstructure frame above pile - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the bending moment generated at the pile head and the foundation beam with respect to the horizontal force as compared with the conventional method, and to reduce the amount of reinforcement of the pile body and the foundation beam near the pile head. To simplify the arrangement of reinforcement at the joint between the pile head and the structural frame. SOLUTION: When the cast-in-place concrete pile 32 is constructed, the reinforced car 3 corresponding to the reinforced car 17 of the lowermost pillar 16 is provided.
6 are fixed to the pile head 32A in a state of protruding above the pile head 32A. Next, the steel cage 36 and the lowest floor column 1
The six reinforcing bars 17 are connected. Next, after the reinforcing cage 19 of the foundation beam 18 and the like are assembled and the concrete formwork is assembled, concrete C is poured. Thereby, the upper structure frame 40 is formed, and the lower surface 40A of the upper structure frame 40 is formed.
And a pillar 42 made of reinforced concrete between the cast-in-place concrete pile 32 and the pile head 32A. Pillar 42
Has the same cross section as the lowermost pillar 16 and is smaller than the cross section of the cast-in-place concrete pile 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a pile and a superstructure frame in a structure and a method of constructing a superstructure frame above the pile, and more particularly to a cast-in-place concrete pile or a cast-in-place steel pipe. The present invention relates to a reinforced concrete structure having a concrete pile and a construction method thereof.

[0002]

2. Description of the Related Art With reference to FIGS. 5 and 6, a joint structure between a pile and its upper structural body in a conventional reinforced concrete structure will be described in accordance with a construction procedure. 5 (A) is a plan view of a joint between the cast-in-place concrete pile and the superstructure skeleton, FIG. 5 (B) is a sectional front view of the same, and FIG. 6 (A) is a joint between the cast-in-place steel pipe concrete pile and the superstructure skeleton. (B) shows the same cross-sectional front view. In the cast-in-place concrete pile 12 shown in FIG. 5, a pile cap (footing) 14 is provided on the pile head 12A, and the cast-in-place concrete pile 1 is placed in the pile cap 14.
The second reinforcing bar 15, specifically the main reinforcing bar 150 of the reinforcing bar 15
2, the main reinforcing bar 1502 and the reinforcing bar 17 of the lowermost column 16, specifically the main reinforcing bar 1702 of the reinforcing bar 17, in the pile cap 14, the reinforcing bar 19 of the foundation beam 18, specifically the beam of the reinforcing bar 19 It is fixed with a sufficient length together with the main bar 1902. In the cast-in-place steel pipe concrete pile 22 shown in FIG. 6, a pile cap (footing) 24 is provided on the pile head 22 </ b> A, and the anchoring stud 2202 welded to the outer periphery of the cast-in-place steel pipe concrete pile 22 is inserted into the pile cap 24. The fixing bars 2202 and the main bars 1702 of the lowermost column 16 are fixed together with the beam main bars 1902 of the foundation beam 18 in the pile cap 24 with a sufficient length.

[0003]

However, in such a conventional structure, the pile caps 14 and 24 have
In addition to the main or anchoring muscles of 2,22 and pillar 16,
Since the beam main reinforcement 1902 is penetrated or fixed, and the reinforcement of the pile caps 14 and 24 is also arranged, the reinforcements in the pile caps 14 and 24 are extremely complicated. In the conventional structure, the pile heads 12A, 22A
Are integrally connected to the foundation beam 18 via the pile caps 14 and 24, and the constraint conditions of the pile heads 12A and 22A are almost fixed. Therefore, when a large horizontal force acts due to seismic force or the like, the pile head is A large bending moment is generated in 12A and 22A, and the foundation beam 18 and the pile caps 14 and 24 need to have a corresponding strength. The present invention has been devised in view of the above circumstances, and the present invention reduces the bending moment generated in the pile head and the foundation beam with respect to the horizontal force as compared with the conventional method, so that the vicinity of the pile head is reduced. An object of the present invention is to reduce the amount of reinforcing steel of a pile and a foundation beam, and to simplify the arrangement of reinforcing bars at a joint between a pile head and a structural skeleton.

[0004]

According to the present invention, there is provided a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile, in which an upper structure is constructed. In a structure having a reinforced concrete lower column above a cast-in-place concrete pile, a lower surface of the upper structural body is separated from a pile head of the cast-in-place concrete pile or a cast-in-place concrete pile by a head. And between the lower surface of the upper structural body and the pile head of the cast-in-place concrete pile or cast-in-place steel pipe concrete pile, a column portion having a smaller cross-sectional area than the cast-in-place concrete pile or cast-in-place steel pipe concrete pile The pillar is provided substantially coaxially with the lowermost pillar, and the pillar is made of iron. It is made of concrete and has a reinforced cage inside the concrete, the lower part of the reinforced cage is connected to a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile, and the upper part of the reinforced cage is connected to the reinforced cage of the lowest floor column. It is characterized by being connected. Further, the present invention is characterized in that the lowermost column and the column have substantially the same cross-sectional shape cut along a horizontal plane. In addition, according to the present invention, both the lowermost column and the reinforcing bar of the column portion have a plurality of column main reinforcing bars extending vertically, and the connection between the upper portion of the reinforcing bar and the reinforcing bar of the column, It is characterized in that it is made by joining the ends of both main pillars. Further, the present invention is characterized in that both the lowermost pillars and the pillar portions have substantially the same cross-sectional shape cut along the horizontal plane. Further, the present invention is characterized in that a gap is secured between the lower surface of the upper structure skeleton and the pile head of the cast-in-place concrete pile or cast-in-place steel pipe concrete pile around the column portion. . Further, in the present invention, the upper structural frame has a foundation beam or a mat slab, and an upper end of a reinforcing cage of the column portion is higher than a lower surface of the foundation beam or the mat slab. Are located below the upper surface of the. Further, the present invention provides that, when the cast-in-place concrete pile or the cast-in-place steel pipe concrete pile is constructed, the reinforcing steel cage of the column portion is embedded and fixed in the pile head with its upper part protruding from the pile head. Features. Further, according to the present invention, an upper structural skeleton is constructed on a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile, and the upper structural skeleton is a lower floor made of reinforced concrete above the cast-in-place concrete pile or the cast-in-place steel pipe concrete pile. In a structure having columns, a lower surface of the upper structural skeleton is located above a pile head of the cast-in-place concrete pile or a cast-in-place steel pipe concrete pile, and a lower surface of the upper structural skeleton and the cast-in-place concrete pile Alternatively, between the cast-in-place steel pipe concrete pile and the pile head is connected by a column having a smaller cross-sectional area than the cast-in-place concrete pile or cast-in-place steel pipe concrete pile, and the column is substantially coaxial with the lowermost column. The column is made of reinforced concrete, and the lowermost Mashimashi Kagoganobe,
The lower part of the reinforcing cage is connected to the cast-in-place concrete pile or the cast-in-place steel pipe concrete pile. Further, the present invention relates to a construction method of constructing an upper structural body including a lowermost pillar on a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile. At the time of construction, projecting above the pile head and fixing the reinforced car for the column to the cast-in-place concrete pile or cast-in-place steel pipe concrete pile, and then, above the cast-in-place concrete pile or cast-in-place steel pipe concrete pile, While connecting the rebar car of the lowermost column and the rebar car for the column, arranging a rebar car constituting another upper structure frame portion, and then the rebar car for the column is buried. The cross section cut in the horizontal plane by placing concrete in the concrete is smaller than the cast-in-place concrete pile or cast-in-place steel pipe concrete pile While constructing a pillar having a surface, the lower surface of the upper structure skeleton is located at a position separated above the pile head, and concrete is cast so that the reinforcing steel cage is buried, and It is characterized by the construction of a structural frame.

According to the present invention, the cross section between the lower surface of the superstructure frame and the pile head of the cast-in-place concrete pile or cast-in-place steel pipe concrete pile is smaller than that of the cast-in-place concrete pile or cast-in-place steel pipe concrete pile. Are connected by reinforced concrete pillars. And the upper and lower parts of the reinforcing bar of this pillar part are connected with the reinforcing bar of the lowest floor column, the cast-in-place concrete pile, or the cast-in-place steel pipe concrete pile. Therefore, the bending moment generated at the pile head and the foundation beam that forms the superstructure frame is reduced compared to the conventional method in response to the horizontal force, thereby reducing the amount of reinforcing bars in the pile body and foundation beam near the pile head. Can,
Reinforcement and the like at the joint between the pile head and the superstructure skeleton can be simplified.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in accordance with construction procedures with reference to the drawings. 1 (A) is a plan view of a joint between a cast-in-place concrete pile and a superstructure skeleton, (B) is a sectional front view thereof, and FIGS. 2 (A) and (B) are cast-in-place concrete piles and a superstructure skeleton. FIG. 3 is an explanatory view when joining the two. The reinforced concrete structure is constructed on a cast-in-place concrete pile 32, and the lowest floor column 16 and the foundation beam 18 are provided on the cast-in-place concrete pile 32.

The cast-in-place concrete pile 32 is shown in FIG.
As shown in (A), a hole 340 excavated in the ground 34
2, a reinforcing steel basket 33 assembled from a plurality of column main reinforcing bars 3302 extending in the vertical direction and a plurality of column reinforcing bars 3304 extending in the horizontal direction, etc. is inserted and formed by casting concrete C. You. In the present embodiment, FIG.
As shown in (B), the reinforcing bar 17 of the lowest floor column 16 is
It is assembled from a plurality of pillar reinforcements 1702 extending in the vertical direction and a plurality of pillar reinforcements 1704 extending in the horizontal direction, and a reinforcement cage 36 corresponding to such a reinforcement cage 17 is provided. 36 is inserted into the hole 3402 of the ground 34 in a state of being assembled (fixed) to the reinforcing cage 33 before the concrete C is poured.

As shown in FIG. 2A, a plurality of column main bars 1702 of the reinforcing bar 17 of the lowermost column 16 are provided.
Column main bars 3602 and a plurality of column band bars 1
704 is assembled to a predetermined length with the same cross-sectional shape as the reinforcing cage 17 from the column reinforcement 3604 corresponding to 704, so that the upper part of the reinforcing cage 36 projects above the pile head 32A of the cast-in-place concrete pile 32. Is provided. The distance from the pile head 32A to the lower end of the column main bar 3602 of the reinforcing cage 36 is set to be equal to or longer than the anchoring length of the reinforcing bar required for structural design. Therefore, by placing the concrete C into the hole 3402 into which the reinforcing cages 33 and 36 are inserted, the upper portion of the reinforcing cage 36 protrudes above the pile head 32A of the cast-in-place concrete pile 32.

Next, above the cast-in-place concrete pile 32, as shown in FIG. 2 (B), the lowermost column 16 is coaxial with the protruding reinforcing cage 36 and attached to the upper end of the reinforcing cage 36.
Are connected to each other. Specifically, reinforcing bars 17, 3
The ends of the column main bars 1702 and 3602 of No. 6 are joined by pressure welding, welding, mechanical joints, or the like. Next, as shown in FIG. 1B, above the cast-in-place concrete pile 32,
The reinforcing cage 19 of the foundation beam 18 is assembled. In this case, the lower surface 40A of the upper structural frame 40 composed of the foundation beam 18 and the lowermost pillar 16 and the pile head 32 of the cast-in-place concrete pile 32
A reinforcing cage 19 of the foundation beam 18 is assembled so that a gap is secured between the reinforcing bars 19 and A.

Next, a concrete formwork (not shown) is arranged so as to surround the reinforcing bars 17 and 19, and a cast-in-place concrete pile 32 is provided below the reinforcing bars 19 of the foundation beam 18 and above the pile head 32A. Concrete formwork (not shown) is placed around a reinforcing cage 36 projecting upward from the pile head 32A of the above, and concrete C is poured into these concrete formworks. By placing this concrete C,
An upper structure skeleton 40 made of reinforced concrete, comprising a foundation beam 18 and a lowermost pillar 16, is formed. A lower surface 40 A of the upper structure skeleton 40 is a pile head 32 A of a cast-in-place concrete pile 32.
It is located at a position separated above.

[0011] Also, by casting this concrete C,
Between the lower surface 40A of the structural skeleton 40 and the pile head 32A of the cast-in-place concrete pile 32, a short length reinforced concrete pillar 42 is formed. The column portion 42 has the same cross-sectional shape as the lowermost column 16, has a cross-sectional shape smaller than that of the cast-in-place concrete pile 32, and the lowermost column 16 and the column portion 42 are substantially coaxial. It is located in. Since the pillar 42 is provided, the structural skeleton 40 and the pile head 32A of the cast-in-place concrete pile 32 are not connected in direct contact with each other.
Lower surface 40A and cast-in-place concrete pile 32 pile head 3
2A and the upper structure skeleton 4
0 and the cast-in-place concrete pile 32 are connected. The gap S is set such that the lower surface 40A of the structural skeleton 40 does not contact the pile head 32A of the cast-in-place concrete pile 32 even if the cast-in-place concrete pile 32 or the like is deformed.

According to this embodiment, the lower surface 40A of the structural frame 40 and the pile head 32A of the cast-in-place concrete pile 32 are provided.
And the cross-sectional performance of the pile head 32A of the cast-in-place concrete pile 32 depends on the performance of the column portion 42. Therefore, the bending strength of the pile head 32A is smaller than that of the conventional method. Drops. However, the horizontal strength of the entire cast-in-place concrete pile 32 is not greatly reduced as compared with the conventional construction method by designing the cross section of the column portion 42 so as to have the strength and the deformation capacity necessary for the structural design. Also,
The bending moment generated in the pile head 32A does not exceed the bending strength of the pile head 32A, that is, the bending strength of the column 42. Therefore, according to the present embodiment, the horizontal strength of the entire cast-in-place concrete pile 32 is not significantly reduced as compared with the conventional construction method, and the amount of rebar near the pile head 32A compared with the conventional construction method for the same horizontal force is reduced. Can be reduced. Further, the bending moment generated in the foundation beam 18 is also reduced as compared with the conventional method, and the cross-sectional dimension of the foundation beam or the amount of rebar can be reduced.

Also, in the present embodiment, the reinforcing cage 33 of the cast-in-place concrete pile 32, specifically, the main pile 3302
Is not extended upward from the pile head 32A, so that excavation of the ground and formation of the pile head A are facilitated. Further, since the conventional pile cap is not used, the connection between the reinforcing bar cage 36 and the reinforcing bar cage 17 of the lowermost column 16 and the reinforcing bar cage 19 of the foundation beam 18 and the reinforcing bar cage 17 of the lowermost column 16 are prevented.
And the work of assembling the concrete formwork can be simplified.

Next, an embodiment in the case of constructing a superstructure skeleton on a cast-in-place steel pipe concrete pile will be described in accordance with a construction procedure with reference to the drawings. FIG. 3 (A) is a plan view of a joint portion between a cast-in-place steel pipe concrete pile and a superstructure skeleton, FIG. 3 (B) is a sectional front view thereof, and FIG.
(B) shows an explanatory view when joining the cast-in-place steel pipe concrete pile and the superstructure skeleton. As shown in FIG. 3, the reinforced concrete structure is constructed on a cast-in-place steel pipe concrete pile 52, and the lowest floor column 16 and the foundation beam 18 are provided on the cast-in-place steel pipe concrete pile 52. .

The cast-in-place steel pipe concrete pile 52 is shown in FIG.
As shown in (A), a hole 340 excavated in the ground 34
2 is formed by inserting a steel pipe 5202 into the steel pipe 5 and casting concrete C inside the steel pipe 5202. In the present embodiment, as shown in FIG. 3 (B), the reinforcing cage 17 of the lowest floor column 16 includes a plurality of column main bars 170 extending in the vertical direction.
2 and a plurality of column bars 1704 extending in the horizontal direction, and a reinforcing bar cage 56 corresponding to such a reinforcing bar cage 17 is provided. This reinforcing bar cage 56 is placed before the concrete C is cast. It is fixed inside the steel pipe 5202 by an appropriate means.

As shown in FIG. 4 (A), the rebar cage 56 includes a plurality of column main bars 17 of the rebar cage 17 of the lowermost column 16.
02 and the column bars 5604 respectively corresponding to the plurality of column bars 1704 are assembled to a predetermined length with the same cross-sectional shape as the rebar cage 17, and the upper part of the rebar cage 56 is cast in place. The steel pipe concrete pile 52 is provided so as to protrude above the pile head 52A. From the pile head 52A, the column main bar 5602 of the reinforcing steel basket 56
The distance to the lower end is set to be equal to or longer than the anchoring length of the reinforcing bar required for structural design. Therefore, by placing the concrete C into the steel pipe 5202 into which the reinforcing steel cage 56 is inserted, the upper part of the reinforcing steel cage 56 protrudes above the pile head 52A of the cast-in-place steel pipe concrete pile 52.

Next, as shown in FIG. 4 (B), above the cast-in-place steel pipe concrete pile 52, the reinforcing cage of the lowermost column 16 is coaxial with the projecting reinforcing cage 56 and at the upper end of the reinforcing cage 56. 17 are connected. Specifically, the ends of the column main bars 1702 and 5602 of the reinforcing bars 17 and 56 are joined by pressure welding, welding, a mechanical joint, or the like. In the figure, X indicates a joining portion. Next, FIG.
(B) As shown in FIG.
At the upper part, the reinforcing cage 19 of the foundation beam 18 is assembled. In this case, the reinforcing steel of the foundation beam 18 is secured so that a gap is secured between the lower surface 40A of the upper structure skeleton 40 composed of the foundation beam 18 and the lowermost column 16 and the pile head 52A of the cast-in-place concrete pipe 52. Assemble the basket 19.

Next, a concrete formwork (not shown) is disposed so as to surround these reinforcing bars 17 and 19, and a cast-in-place steel pipe concrete pile is provided below the reinforcing bars 19 of the foundation beam 18 and above the pile head 52A. Concrete formwork (not shown) is placed around a reinforcing cage 56 projecting above the pile head 52A of 52, and concrete C is poured into the concrete formwork. By the casting of the concrete C, an upper structure skeleton 40 made of reinforced concrete including the foundation beam 18 and the lowermost pillar 16 is produced.

Also, by casting the concrete C,
A short length reinforced concrete pillar 62 is formed between the lower surface 40A of the structural skeleton 40 and the pile head 52A of the cast-in-place steel pipe concrete pile 52. The column portion 62 has the same cross-sectional shape as the lowermost column 16, has a cross-sectional shape smaller than the cross-section of the cast-in-place concrete pipe 52, and the lowermost column 16 and the column portion 62 are substantially coaxial. Located on top. And since the column part 62 is provided, the structural skeleton 40 and the pile head 52 of the cast-in-place steel pipe concrete pile 52 are provided.
A is not connected in a state where A is in direct contact with the upper structure in a state where a gap S is secured between the lower surface 40A of the structural skeleton 40 and the pile head 52A of the cast-in-place concrete pipe 52 around the column 62. Frame 40 and cast-in-place steel pipe concrete pile 5
2 are connected. Even if the gap S is deformed in the cast-in-place steel pipe concrete pile 52 or the like, the lower surface 40A of the structural skeleton 40 and the pile head 5 of the cast-in-place steel pipe concrete pile 52 are formed.
The interval is set so as not to make contact with 2A. According to the present embodiment, the same operation and effect as in the case of the cast-in-place concrete pile 32 described above are exhibited.

In the above embodiment, the pillars 42,
The case where the reinforcing steel cages 36 and 56 of 62 are projected from the cast-in-place concrete pile 32 and the cast-in-place steel pipe concrete pile 52 to a height closer to the lower surface 40A above the lower surface 40A of the upper structural body 40 has been described. The height is arbitrary. If the upper ends of the reinforcing cages 36 and 56 are made to protrude, for example, to a height in a range between the lower surface 40A and the upper surface of the upper structure skeleton 40, the reinforcing cage 17 And the connection work becomes easier and more convenient. Further, when the excavation of the ground and the formation of the pile head are not hindered, the upper ends of the reinforcing cages 36 and 56 are made to protrude above the upper surface of the upper structural body 40, and the reinforcing cages 36 and 56 are Parts 42, 62
It is possible not only to function as a reinforcing bar cage but also to function as a reinforcing bar cage 17 of the lowermost pillar 16. Further, in the above-described embodiment, the case where the upper structure skeleton 40 has the foundation beam 18 has been described. However, the present invention is also applied to the case where the upper structure skeleton 40 has a mat slab instead of the foundation beam 18. You.

[0021]

As is apparent from the above description, according to the joint structure between the pile and the upper structure skeleton in the structure of the present invention and the method of constructing the upper structure skeleton above the pile, the lower surface of the upper structure skeleton is constructed. Is connected between the cast-in-place concrete pile or the cast-in-place steel pipe concrete pile head by a reinforced concrete column having a cross section smaller than that of the cast-in-place concrete pile or cast-in-place steel pipe concrete pile. The upper and lower parts of the car are connected to the reinforcing bar of the lowest column, the cast-in-place concrete pile, or the cast-in-place steel pipe concrete pile. Therefore, the bending moment generated at the pile head and the foundation beam that forms the superstructure frame is reduced compared to the conventional method in response to the horizontal force, thereby reducing the amount of reinforcing bars in the pile body and foundation beam near the pile head. Can,
Reinforcement and the like at the joint between the pile head and the superstructure skeleton can be simplified.

[Brief description of the drawings]

FIG. 1A is a plan view of a joint between a cast-in-place concrete pile and a superstructure skeleton, and FIG. 1B is a front sectional view of the same.

FIGS. 2A and 2B are explanatory views when joining a cast-in-place concrete pile and a superstructure skeleton.

FIG. 3 (A) is a plan view of a joint between a cast-in-place steel pipe concrete pile and a superstructure skeleton, and FIG. 3 (B) is a sectional front view thereof.

FIGS. 4A and 4B are explanatory diagrams when joining a cast-in-place steel pipe concrete pile and a superstructure skeleton.

FIG. 5 (A) is a plan view of a joint between a conventional cast-in-place concrete pile and a superstructure skeleton, and FIG. 5 (B) is a sectional front view thereof.

FIG. 6 (A) is a plan view of a joint portion between a conventional cast-in-place steel pipe concrete pile and a superstructure skeleton, and FIG. 6 (B) is a front sectional view of the same.

[Explanation of symbols]

 16 Bottom floor column 17, 33, 36, 56 Reinforced basket 18 Foundation beam 32 Cast-in-place concrete pile 32A Pile head 40 Superstructure body 42, 62 Column 52 Cast-in-place steel pipe concrete pile 52A Pile head

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takahiro Maru 4-6-115 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Taro Nakagawa 4-6-115 Sendagaya, Shibuya-ku, Tokyo Stock Company Company F-term F-term (reference) 2E125 AA02 AA04 AB12 AB13 AC04 AC07 AC16 AG60 BA02 BA32 BB00 BC09 BD00 BD01 BE07 BE08 CA00 CA01 CA90

Claims (9)

[Claims] 1. A superstructure skeleton is constructed on a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile,
In the above-mentioned structure, the lower part of the upper structure skeleton is a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile. A cast-in-place concrete pile or a cast-in-place concrete pile or a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile between the lower surface of the upper structural frame and the pile head of the cast-in-place concrete pile or cast-in-place steel pipe concrete pile. Connected by a column having a smaller sectional area than the steel pipe concrete pile, the column is provided substantially coaxially with the lowermost column, and the column is made of reinforced concrete, and has a reinforcing cage inside the concrete. The lower part of the reinforced basket is connected to a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile Is, the upper portion of the reinforcing bar cage is bonded structure between piles and the upper structural framework in the structure, characterized in that, being connected to the reinforcing steel cage of the lowermost Kaibashira. 2. The joint structure between a pile and an upper structural body in a structure according to claim 1, wherein the lowermost column and the column have substantially the same cross-sectional shape as cut in a horizontal plane. 3. The rebar cage of both the lowermost column and the column has a plurality of column main reinforcements extending vertically, and the connection between the upper part of the rebar cage and the rebar cage of the column is both 3. The joint structure between a pile and an upper structural body in a structure according to claim 1 or 2, wherein the ends of the main pillars are joined together. 4. The pile according to claim 1, 2 or 3, wherein the rebar cages of both the lowermost column and the column have substantially the same cross-sectional shape as cut in a horizontal plane. Joint structure with upper structure frame. 5. A gap is secured around the pillar between the lower surface of the upper structural body and the pile head of the cast-in-place concrete pile or cast-in-place steel pipe concrete pile. Item 5. A joint structure between a pile and an upper structure body in the structure according to any one of Items 1 to 4. 6. The upper structural frame has a foundation beam or a mat slab, and an upper end of a reinforcing cage of the column portion is higher than a lower surface of the foundation beam or the mat slab. The joint structure between a pile and an upper structure skeleton in a structure according to any one of claims 1 to 5, wherein the structure is located below an upper surface. 7. The rebar cage of the column part is embedded and fixed in the pile head with the upper part projecting from the pile head when the cast-in-place concrete pile or the cast-in-place steel pipe concrete pile is constructed. The joint structure between the pile and the upper structure skeleton in the structure according to any one of claims 1 to 6. 8. An upper structural skeleton is constructed on a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile,
The above-mentioned upper structure skeleton is a structure having a lower floor column made of reinforced concrete above a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile. The lower surface of the upper structure skeleton is the cast-in-place concrete pile or the cast-in-place steel pipe concrete pile. Between the lower surface of the upper structural frame and the pile head of the cast-in-place concrete pile or cast-in-place steel pipe concrete pile, the position being higher than the cast-in-place concrete pile or cast-in-place steel pipe concrete pile. Are also connected by a column having a small cross-sectional area, the column is provided substantially coaxially with the lowermost column, and the column is made of reinforced concrete, and inside the concrete, a reinforcing cage of the lowermost column is provided. Extend the lower part of this reinforced basket to the cast-in-place concrete pile or cast-in-place steel pipe concrete pile. A joint structure between a pile and a superstructure skeleton in a structure which is connected. 9. A construction method of constructing an upper structural body including a lowermost pillar on a cast-in-place concrete pile or a cast-in-place steel pipe concrete pile, wherein: Occasionally, the column reinforced cage is fixed to the cast-in-place concrete pile or cast-in-place steel pipe concrete pile by projecting upward from the pile head, and then, above the cast-in-place concrete pile or cast-in-place steel pipe concrete pile, Along with connecting the rebar cage of the lowest floor column and the rebar cage for the column, and arranging the rebar cage constituting the other upper structural skeleton, the rebar cage for the column is then buried. A section in which concrete is cast and cut in the horizontal plane is smaller than the cast-in-place concrete pile or cast-in-place steel pipe concrete pile. While constructing a pillar having a surface, the lower surface of the upper structure skeleton is located at a position separated above the pile head, and concrete is cast so that the reinforcing steel cage is buried, and A construction method for constructing an upper structural body above a pile, characterized in that the structural body is constructed.