JP3900344B2 - Column-to-pile connection structure of steel structure building and its construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure and a method for connecting columns and piles of a steel building, and more particularly, to a steel building column that can smoothly transmit bending and shear stress by solidly connecting the existing concrete pile and the steel column. The present invention relates to a pile connection structure and its construction method .
[0002]
[Prior art]
In normal buildings, the pile head upper end, the column base, and the foundation beam are joined together via footings as a general foundation structure, but in a low-rise steel structure with a small upper load, it is simple. As a rational foundation structure, piles and steel columns are directly connected, and a foundation structure type that does not use footings and foundation beams has begun to be used.
[0003]
As a foundation structure type that directly connects such a pile and steel column, cast-in-place pile, precast concrete pile by centrifugal force forming (RC pile, PC pile, PHC pile), or precast concrete with shell steel pipe A number of foundation structure types in which steel columns are connected to piles such as piles (SC piles) have been proposed, and the following examples shown in FIGS. 5 and 6 are conventional examples closest to the present invention.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-1000085 (page 3, paragraph number “0011”, FIG. 2)
[0005]
[Patent Document 2]
JP 2001-115464 A (page 2, paragraph number “0014” to page 3, paragraph number “0017”, FIG. 4)
[0006]
In the example of Patent Document 1, the root cutting work and the welding work at the site are omitted by the structure shown in FIG. 5, and cost reduction and work period shortening are attempted.
[0007]
The ready-made concrete pile 2 of the foundation structure 24 is filled with a cement 8 in the hollow portion and hardened, and the steel column 3 is directly joined to the ready-made concrete pile 2 by an anchor bolt 25 at the lower end. Further, a steel pipe 26 is extrapolated at the lower end of the steel column 3 and the upper end of the precast concrete pile 2 and filled with a hardening material 27 such as concrete or non-shrink mortar to be hardened. ing.
[0008]
The prefabricated concrete pile 2 and the steel column 3 are joined via the steel pipe 26 and also directly joined to ensure the joining strength. If a construction error of the precast concrete pile 2 occurs, the steel pipe 26 and the position of the steel column 3 are finely adjusted.
[0009]
However, in the basic structure of this example, since the connection between the steel pipe and the pile is integrated by the insertion structure, the bonding strength is held only by the adhesive force between them, and the pulling force acts on the column. In such a case, there is a risk that the adhesive force may be cut and destroyed.
[0010]
In addition, because the steel pipe and the PC steel material that constitutes the pile are separated, there is a concern that the bending stress acting on the steel pipe cannot be transmitted smoothly to the pile at the time of an earthquake, and at the same time due to the shaking of the superstructure The steel pipe gives shearing force near the pile end and has the possibility of causing pile body damage.
[0011]
Furthermore, when steel pipes arranged outside the piles and columns were inserted after the column construction, there was also anxiety that the quality would not be stable due to site construction.
[0012]
In addition to this, as a similar form of the structure shown in FIG. 5, there is also a pile structure in which the steel pipe 26 is extrapolated directly to the outer periphery of the pile head upper end surface of the precast concrete pile 2 without using a hardening material 27 such as concrete or non-shrink mortar. However, in this example, in addition to the above problems, the steel pipe is fitted to the outer periphery of the top end of the pile head, so the steel pipe is pushed from the top end of the pile head when driving the pile with a pile driver. There is also a problem that the main length may not be secured.
[0013]
The conventional example of Patent Document 2 shown in FIG. 6 is configured to be rigidly connected by inserting a column base into the upper end surface of the pile head.
[0014]
In this example, the foundation structure 28 is comprised with the precast concrete pile 2 and the steel column 3 which consists of a square steel pipe. The steel column 3 is inserted and filled with a non-shrink mortar or concrete filler 29 while directly inserting the column base portion into the pile head upper end surface 5 of the precast concrete pile 2. The column base is rigidly joined, and the reinforcement of the joint is provided by providing a concrete reinforcing structure 31 around the pile head upper end surface 5 while providing the hoop bars 30 in multiple stages around the outer side of the pile head upper end surface 5. I am trying.
[0015]
However, in the case of this conventional example, in order to create a reinforced concrete member on the outer side of the pile, earth work such as excavation and backfilling of the ground over the range indicated by a chain line around the upper end surface of the pile head is required. In addition, rebar construction, formwork, and concrete work were required, which led to a rise in construction costs and a prolonged construction period.
[0016]
[Problems to be solved by the invention]
The present invention is provided in order to solve the problems of the conventional examples described above, and when the foundation beam and the footing are not used, the existing concrete pile and the steel column are provided. The connection structure between pillars and piles in steel buildings that can reduce the construction cost and shorten the construction period by making the connection firm and smoothly transmitting bending and shear stress and avoiding on-site work and root cutting work The purpose is to provide the construction method .
[0017]
[Means for Solving the Problems]
Coupling structure of pillars and piles of Steel Building according to the present invention is a essentially a coupling structure of Steel Building pillars and piles formed by connecting piles and steel columns without using the foundation beams and footings, Between a precast concrete pile with a circular hollow section and a steel column placed at a predetermined position on the ground, it is joined to an end face hardware attached to the pile head upper end surface of the precast concrete pile with a diameter equal to or less than that of the precast concrete pile. The steel column installed at a predetermined position in the interior is constructed by providing a steel pipe that integrates and connects with the precast concrete pile with concrete filled in the interior, and the steel pipe is joined to the precast concrete pile and placed It is configured to be, specifically, whether the steel pipe pile head upper end face is welded butt, or the mounting flange provided at the lower end of the steel pipe, a mounting flange on the pile head upper surface of the ready-made concrete pile Or belt junction, the mounting flange, or provided reinforcing ribs between the steel pipe, and further, concrete for shear reinforcement, or fixed to the pile head upper surface of the ready-made concrete pile, in which the shear reinforcement The steel pipe has a bottomed cylindrical body that is suspended in the hollow part of the precast concrete pile, and is supported by the vertical bars protruding from the top end of the pile head of the precast concrete pile. It is fixed to the upper end face of the pile head of the pile, or in that case, concrete is filled in the bottomed cylindrical body . Alternatively, the column and pile connection structure of a steel building according to the present invention is basically a column and pile connection structure of a steel building formed by connecting a pile and a steel column without using foundation beams and footings. , steel pipe preformed concrete pile and Dosoto径is attached to the end face hardware of pile head upper surface of the ready-made concrete pile, steel pipe is pouring is joined to the prefabricated concrete pile, column base of the steel columns are installed in the steel pipe The steel column is integrated and connected to the precast concrete pile by the concrete filled in the steel pipe, and the concrete is in contact with the end face hardware and the steel column direction, and the steel pipe is the upper end surface of the pile head of the precast concrete pile. of or it is welded to the end faces hardware, or mounting flange is provided at the lower end of the steel pipe to be attached to the end face hardware of pile head upper surface of the ready-made concrete pile, the mounting flange ready-made concrete The end face hardware of pile head upper surface of the pile is adapted to be bolted.
[0018]
As a result, the connection structure between the pillars and piles is to secure the connection between the precast concrete piles and the steel columns to facilitate the transmission of bending and shear stress, and to avoid the work on the site and the root cutting work. The construction cost and construction period are shortened.
[0019]
In addition, the construction method of the column-pile connection structure of the steel building according to the present invention is a construction method of the column-pile connection structure of a steel building formed by connecting the pile and the steel column without using the foundation beam and the footing. A steel pipe of a predetermined length not more than the same outer diameter as that of the precast concrete pile is joined to the end face hardware attached to the upper end surface of the pile head of the precast concrete pile having a circular hollow cross section, and then the precast concrete pile to which the steel pipe is joined is ground. Then, a steel column is built in a predetermined position in the steel pipe, and then the concrete is filled in the steel pipe, and the precast concrete pile and the steel column are integrated and connected. Fabrication of prefabricated concrete piles that are bonded to each other is carried out at factories, etc., and only the concrete is filled on site, so the quality of the column-pile connection structure is improved and construction efficiency is improved.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Coupling structure of pillars and piles of Steel Building according to the present invention is a essentially a coupling structure of pillars and piles Steel building without a foundation beams and footings formed by connecting the piles and steel columns directly , between the predetermined position Da設been circular hollow section preformed concrete pile and steel columns of the ground, it is joined to the pile head upper surface of the ready-made concrete pile under preformed concrete pile and Dosoto diameter or less, given that the internal The steel column installed in the position is provided with a steel pipe that is integrated with the existing concrete pile with concrete filled therein .
[0021]
DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment relating to a column / pile connection structure of the present invention will be described in detail with reference to the drawings. However, the same reference numerals are used to indicate the same parts as in the prior art.
[0022]
Figure 1 shows an embodiment of a connection structure of columns and piles according to the invention, footing beams and piles without footing and steel columns and configured by connecting directly the pillars and piles coupling structure Are shown by an elevational sectional view (a) and a planar sectional view (b).
[0023]
The pillar-to-pile connection structure 1 according to the present invention is configured by directly connecting the precast concrete pile 2 and the steel pillar 3. Although the steel pipe 4 is being fixed to the pile head upper end surface 5 of the ready-made concrete pile 2, the dimension of the steel pipe 4 is the same as the outer diameter dimension of the ready-made concrete pile 2, The height (H) is set to a minimum constant value necessary for appropriately transmitting the stress from the pile 2 to the steel column 3.
[0024]
The steel pipe 4 is firmly fixed by a butt welding 7 to a donut-shaped end face metal 6 arranged at both ends of the precast concrete pile 2 and connected to the pile main reinforcement, and the upper end of the precast concrete pile 2 It is constructed integrally.
[0025]
Thus, it is normal construction method to fill the hollow portion of the precast concrete pile 2 after being placed, but in the placement of the precast concrete pile 2, a void is left in the hollow portion of the pile. There are cases of dredging and cases where the hollow portion is filled with earth and sand.
[0026]
And, in the case of a ridge with a gap left in the hollow part, the gap part is filled with an appropriate means, and in the latter case, the pile can be placed on the ground by looking forward with an auger or the like. In this case, the concrete placement is performed by removing the earth and sand from the top end of the pile head after placing the existing concrete pile, and the concrete from the top end of the pile head is placed in the remaining hollow portion of the pile. It will be constructed to a predetermined depth.
[0027]
The prefabricated concrete pile 2 joined with the steel pipe 4 is placed at a predetermined position on the site where a low-rise steel building with a small upper load is constructed, and a simple and rational column and pile without using footings and foundation beams . Although it is arranged to constitute the connection structure 1, after the precast concrete pile 2 is placed, the steel column 3 is built in a predetermined position in the steel pipe 4, and the concrete 8 or nothing is put in the steel pipe 4. The hardened material such as shrink mortar is filled and hardened, and the precast concrete pile 2 and the steel column 3 are integrally configured as a connecting structure 1 that is directly connected.
[0028]
In addition, the steel column 3 can select the shape in arbitrary forms, such as a square and a circle | round | yen, and the selection of hollow, inner cover, etc. is also arbitrary similarly. If necessary, the strength of the bond with the concrete can be adjusted by attaching a plurality of stud gibels 9 to the column base as shown.
[0029]
With the above configuration, the column-to-pile connection structure of a steel building according to the present invention provides a firm connection between the precast concrete pile and the steel column, facilitates the transmission of bending stresses, and performs on-site work and root cutting. By avoiding the construction work, it is possible to reduce the construction cost and the construction period.
[0030]
In addition, the construction method of the column-pile connection structure of the steel building according to the present invention is a construction method of the column-pile connection structure of a steel building formed by connecting the pile and the steel column without using the foundation beam and the footing. A steel pipe having the same outer diameter as the precast concrete pile and a predetermined length is joined to the upper end surface of the pile head of the precast concrete pile, and then the precast concrete pile to which the steel pipe is joined is placed in a predetermined position, A steel column is built in a predetermined position, and then concrete is placed in the steel pipe to integrate the existing concrete pile and the steel column.
[0031]
That is, in the embodiment of the construction method of the column and pile connection structure according to the present invention, the steel pipe having the same outer diameter and the predetermined length as the precast concrete pile 2 on the pile head upper end surface 5 of the precast concrete pile 2. The work of welding 7 for attaching 4 is carried out as a machine work in the factory, and it is possible to establish stable quality in the ready-made concrete pile 2 joined with the steel pipe 4 .
[0032]
Next, the prefabricated concrete pile 2 joined with the steel pipe 4 is transported to the construction site and placed at a predetermined position in the site, but in this case, it avoids any mechanical work or rooting work on site. It is economical by improving the construction efficiency.
[0033]
In addition, after placing the precast concrete pile 2 joined with the steel pipe 4 , the steel column 3 is built in a predetermined position in the steel pipe 4, and after setting the position, the concrete 8 is placed to integrate the pile and the pillar. The column and pile connection structure is easily configured by simple short-term work.
[0034]
As described above, the construction method of the connecting structure of the pillars and piles according to the present invention performs the production of ready-made concrete piles joined the steel pipe in the factory or the like, because in the field of construction of just pouring the concrete, pillars and of the pile It is possible to improve the connection structure and improve the construction efficiency.
[0035]
FIG. 2 shows an embodiment of a connecting structure of pillars and piles according to the present invention, which is shown by an elevational sectional view (a) and a planar sectional view (b).
[0036]
In this embodiment, securing the specially processed steel tube 4 'in the pile head upper surface 5 ready-made concrete pile 2. The connection of the steel pipe 4 ′ to the pile head upper end surface 5 of the precast concrete pile 2 is configured by screwing with a donut-shaped end surface hardware 6 connected to the pile main reinforcement.
[0037]
Further, the steel pipe 4 ′ is provided with a donut-shaped mounting flange 10 facing the end face metal 6 at the lower end portion of the steel pipe 4 having the same outer diameter and the predetermined length as that of the precast concrete pile 2. The mounting flange 10 is provided with a rib plate 11 for reinforcement between the pipe wall of the steel pipe 4 and a mounting hole 12.
[0038]
On the other hand, the donut-shaped end surface hardware 6 provided on the pile head upper end surface 5 of the precast concrete pile 2 is used as a mold when the precast concrete pile is subjected to centrifugal molding, and is fixed to the centrifugal molding apparatus. A screw hole 13 is provided.
[0039]
In the present embodiment, the screw hole 13 is also used as a screw hole for joining the bolt of the mounting flange, so that the bolt 14 passed through the mounting hole 12 is screwed into the bolt 14. The steel pipe 4 ′ is fixed to the pile head upper end surface 5 of the precast concrete pile 2 by screwing a double nut 15 to the bolt 14 after that. .
[0040]
Therefore, in the present embodiment, the steel pipe is bolted to the upper end surface of the pile head of the precast concrete pile while utilizing the screw hole for fixing the formwork when centrifugally forming the precast concrete pile. Eliminates screw processing to improve construction efficiency.
[0041]
FIG. 3 shows another embodiment of the column-pile connection structure according to the present invention, which is shown by an elevational sectional view (a) and a planar sectional view (b).
[0042]
In this embodiment, the reinforcing bar cage 16 is fixed as a shear reinforcement for concrete to be Da設the pile head upper surface 5 ready-made concrete pile 2. The rebar bar 16 is arranged at a predetermined position by the illustrated vertical bar 17, but also in the present embodiment, the screw holes necessary for fixing the formwork when the preformed concrete pile is centrifugally formed. 13 is also used for mounting the vertical bar 17 that supports the reinforcing bar 16.
[0043]
The vertical bar 17 is screwed to the end face hardware 6 by using the screw hole 13 by constituting a screw at the lower end, and the precast concrete pile 2 is connected to the vertical bar 17 by connecting the reinforcing bar rod 16 to the vertical bar 17. The reinforcing bar 16 that reinforces the strength of the concrete to be placed is securely positioned.
[0044]
Therefore, in this embodiment, the vertical bars for joining the reinforcing bar rods are formed on the upper end surface of the pile head of the precast concrete pile while utilizing the screw holes for fixing the formwork when the preformed concrete pile is centrifugally formed. Since they are screwed together, special threading is eliminated to improve construction efficiency.
[0045]
In addition, the steel pipe 4 fixed to the pile head upper end surface 5 of the ready-made concrete pile 2 has the predetermined | prescribed length with the same outer diameter as the ready-made concrete pile 2 similarly to the said embodiment, and the pile head upper end surface 5 Since the work of welding 7 to be attached to the end face hardware 6 is performed as a machine work in the factory, it is possible to establish a stable quality in the precast concrete pile 2 joined with the steel pipe 4 . Further, in the case of the reinforcing bar 16, it can be inserted from above the steel pipe, but the shear reinforcing bar is not limited to this embodiment, but a simple form such as a hoop bar, etc. But it can be adopted.
[0046]
FIG. 4 shows another embodiment of the column-pile connection structure according to the present invention, which is represented by an elevational sectional view (a) and a perspective view (b) showing a mounted state before fixing.
[0047]
In this embodiment, the steel pipe 18 of the two-step shape is formed into a pile head upper surface 5 ready-made concrete pile 2 is fixed. The steel pipe 18 has a predetermined length with the same outer diameter as that of the precast concrete pile 2 in the same manner as the steel pipe 4 ′ shown in the above embodiment in the upper portion 18-1 disposed on the pile head upper end surface 5 of the precast concrete pile 2. A lower end portion of the steel pipe 4 is provided with a donut-shaped mounting flange 10 facing the end face hardware 6, and the end face hardware 6 disposed on the pile head upper end face 5 and the mounting flange 10 are coupled. In this way, it is possible to connect and fix the pile main bars in close proximity.
[0048]
The lower part 18-2 of the steel pipe 18 is composed of a cylindrical body 21 having a bottom part 19. The outer diameter of the cylindrical body 21 is formed to have the same dimensions as the inner diameters of the end face hardware 6 and the mounting flange 10, while the mounting flange 10 Are welded integrally with each other to form a two-stage steel pipe 18, and the lower part 18-2 is loosely fitted into the hollow portion of the pre-formed concrete pile 2 so as to place concrete in the steel pipe 18. At the same time as the formwork, the joint range between the precast concrete pile 2 and the concrete precast concrete pile 2 that joins the column base of the steel column 3 is expanded.
[0049]
Therefore, in this embodiment, by expanding the joining region between the concrete and prefabricated concrete pile 2 it is pouring, and at the same time is fixed in the vicinity of the pile main reinforcement which is positioned the steel pipe 18, ready-made concrete from steel columns The transition of stress transmitted to the pile and the response to bending stress are ensured, and the connection between the precast concrete pile and the steel column is further strengthened.
[0050]
Also in this embodiment, the steel pipe is bolted to the upper end face of the pile head of the precast concrete pile while utilizing the screw hole for fixing the formwork when centrifugally molding the precast concrete pile. Eliminates screw processing to improve construction efficiency.
[0051]
As explained in each of the above embodiments, the construction method of the column-pile connection structure according to the present invention is that a prefabricated concrete pile joined with a steel pipe is manufactured at a factory or the like, and only concrete is cast on site. The connection structure between the pillars and piles improves the construction efficiency by improving the connection efficiency between the existing concrete piles and the steel pillars, making the transmission of bending stress smooth and avoiding on-site work and root cutting work. Quality has been achieved.
[0052]
As mentioned above, although each of this invention has been demonstrated in detail based on embodiment, the connection structure of the pillar and pile of a steel-frame building by this invention, and its construction method are not limited to each embodiment at all. Of course, various modifications can be made without departing from the spirit of the invention.
[0053]
【The invention's effect】
Coupling structure of pillars and piles of Steel Building according to the present invention is a connection structure of pillars and piles of Steel Building formed by connecting piles and steel columns without using the foundation beams and footings, predetermined position of the ground Between the precast concrete pile with a circular hollow section placed on the steel column and the end face hardware attached to the upper end face of the precast concrete pile with the same outer diameter as that of the precast concrete pile . It is constructed by providing a steel pipe that connects the steel column installed at a predetermined position with the concrete concrete pile that is integrated with the precast concrete pile, so that the steel pipe is joined to the precast concrete pile and placed. to be configured has basically either steel pipe pile head upper end face is welded butt, or the mounting flange provided at the lower end of the steel pipe, Bol the mounting flange to the pile head upper surface of the ready-made concrete pile Bonding or, in the mounting flange, or provided reinforcing ribs between the steel pipe, and further, concrete for shear reinforcement, or fixed to the pile head upper surface of the ready-made concrete pile, in which prefabricated shear reinforcement The steel pipe has a bottomed cylindrical body that is suspended in the hollow part of the precast concrete pile, and is supported by the vertical bars protruding from the top end of the pile head of the concrete pile. It is fixed to the top end surface of the pile head, or in that case, concrete is filled in the bottomed cylindrical body , or the steel frame is formed by connecting the pile and the steel column without using the foundation beam and footing a connecting structure of columns and piles of concrete buildings, steel pipe preformed concrete pile and Dosoto径is attached to the end face hardware of pile head upper surface of the ready-made concrete pile, steel pipe is pouring is joined to the prefabricated concrete pile Is installed column base of steel columns is within the steel tube, steel columns are connected integrally to the ready-made concrete pile by concrete filled in the steel, a structure in which concrete is in contact with the end face hardware and steel columns direction Yes , the steel pipe is welded and joined to the end face hardware of the pile head upper end surface of the precast concrete pile , or the lower end of the steel pipe attached to the end face hardware of the pile head upper end face of the precast concrete pile is provided with a mounting flange. Since it is designed to be bolted to the end face hardware of the pile head upper end of the concrete pile, the connection between the ready-made concrete pile and the steel column is made firm to facilitate the transmission of bending and shear stress and the work on site. By avoiding the root cutting work, it is possible to reduce the construction cost and shorten the construction period.
[0054]
In addition, the construction method of the column-pile connection structure of the steel building according to the present invention is a construction method of the column-pile connection structure of a steel building formed by connecting the pile and the steel column without using the foundation beam and the footing. A steel pipe of a predetermined length not more than the same outer diameter as that of the precast concrete pile is joined to the end face hardware attached to the upper end surface of the pile head of the precast concrete pile having a circular hollow cross section, and then the precast concrete pile to which the steel pipe is joined is ground. Since then, the steel column is built in the predetermined position in the steel pipe, and then, the concrete is filled in the steel pipe and the precast concrete pile and the steel column are integrated and connected. Prefabricated concrete piles joined with steel pipes are manufactured at factories, etc., and only filled with concrete at the site, so the effect of achieving high quality and improved construction efficiency of the column-pile connection structure is demonstrated. .
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a pillar-to-pile connection structure of a steel building and its construction method according to the present invention. FIG. 2 is a diagram of another embodiment of a pillar-to-pile connection structure and its construction method according to the present invention. FIG. 3 shows another embodiment of the pillar-to-pile connection structure and construction method of the present invention. FIG. 4 shows another embodiment of the pillar-to-pile connection structure and construction method of the invention. Elevated cross section showing the basic structure of a conventional steel structure building [Fig. 6] Elevating cross section showing the basic structure of a conventional steel structure building [Explanation of symbols]
1 foundation structure, 2 precast concrete pile, 3 steel column, 4 , 4 'steel pipe,
5 Upper end surface of precast concrete piles, 6 Donut-shaped end face hardware, 7 Welding,
8 concrete, 9 stud gibber, 10 mounting flange,
11 rib plate, 12 mounting hole, 13 screw hole, 14 bolt,
15 double nuts, 16 rebar rods, 17 longitudinal bars, 18 processed steel pipes,
18-1 upper part, 18-2 lower part, 19 bottom part, 24, 28 foundation structure,
25 anchor bolts, 26 steel pipes, 27, 29 hardened materials, 30 hoops,
31 Reinforced structure

Claims (13)

A steel-structured pillar-to-pile connection structure in which piles and steel columns are connected without using foundation beams and footings, and is a prefabricated concrete pile and steel column with a circular hollow section placed in a predetermined position on the ground Between the steel pillars that are joined to the end face hardware attached to the upper end face of the pile head of the prefabricated concrete pile with the same outer diameter or less as that of the precast concrete pile and installed at a predetermined position inside the pile. Columns and piles of a steel building comprising a steel pipe that is integrated with and connected to the precast concrete pile with concrete to be filled, and the steel pipe is joined to the precast concrete pile and cast. Connection structure . 2. The connection structure between columns and piles of a steel building according to claim 1, wherein the steel pipe is welded and joined to the end face hardware on the upper end face of the pile head of the precast concrete pile. The connection structure of columns and piles of a steel structure building according to claim 2, wherein the welding connection is a connection by butt welding. 2. The connection between a pillar and a pile of a steel building according to claim 1, wherein an attachment flange is provided at a lower end portion of the steel pipe, and the attachment flange is bolted to an upper end face of the pile head of the precast concrete pile. Structure . The structure for connecting a pillar and a pile of a steel structure building according to claim 4, wherein a reinforcing rib is provided between the mounting flange and the steel pipe. The connection structure between a pillar and a pile of a steel structure building according to any one of claims 1 to 5, wherein a concrete shear reinforcement bar is fixed to a pile head upper end surface of the precast concrete pile. The structure for connecting a pillar and a pile of a steel building according to claim 6 , wherein the shear reinforcement for concrete is supported by a vertical reinforcement protruding from an upper end of the pile head of the precast concrete pile. The said steel pipe has a bottomed cylindrical body suspended by the hollow part of the said precast concrete pile, and this bottomed cylindrical body is fixed to the pile head upper end surface of the said precast concrete pile. The connection structure of the pillar and pile of the steel structure building as described in any one of -7. The structure for connecting pillars and piles of a steel structure building according to claim 8 , wherein the concrete is filled in the bottomed cylindrical body . A method of constructing a steel-structured pillar-to-pile connection structure in which piles and steel columns are connected without using foundation beams and footings. Next, a steel pipe having a predetermined length and a diameter equal to or smaller than that of the pre-formed concrete pile is joined, and then the pre-made concrete pile joined with the steel pipe is placed in a predetermined position of the ground, and then, the predetermined position in the steel pipe is set. Construction of a steel building column and pile connection structure characterized in that a steel column is built, and then the concrete is filled into the steel pipe and the precast concrete pile and the steel column are integrated and connected. Law. It is a connecting structure of pillars and piles in a steel building that connects piles and steel columns without using foundation beams and footings ,
Steel pipe preformed concrete pile and Dosoto径is attached to the end face hardware of pile head upper surface of the該既formed concrete pile,
The steel pipe is joined to the prefabricated concrete pile and driven,
Column base portion of the steel column is installed in the steel tube,
The steel columns by a concrete filled in the steel tube is connected integrally to the ready-made concrete piles, concrete of Steel Building, characterized in that in contact with the end face hardware and steel column direction pillars and piles Connection structure . The connection structure between columns and piles of a steel building according to claim 11, wherein the steel pipe is welded to the end face hardware of the pile head upper end surface of the precast concrete pile. The ready-made in the lower portion of the end face the steel pipe to be attached to the hardware of the pile head upper surface of the concrete piles mounting flange is provided, the attachment flange is bolted to the end face fittings of pile head upper surface of the ready-made concrete pile The connection structure of a pillar and a pile of a steel structure building according to claim 11.

Images