JP2002115324A - Column base unit, column integrated column base fixing foundation structure using the column base unit, and construction method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a column beam joining structure in a column integrated column base fixing foundation structure excellent in overall performance for the technological purpose. SOLUTION: In a column material for cross-sectionally arranging a disphragm 11 in a lower part of a column 10 and arranging a baseplate 12 in a lower end part of the column 10, the diaphragm 11 and the baseplate 12 have a widely overhanging shape in a plan view in the direction for connecting an underground beam 2, and are characterized by arranging a web 13 between the diaphragm 11 and the baseplate 12 in this wide part, and in a column base unit 1 including the column material, since the wide part projecting from the column material is constituted as a connecting part with the underground beam 2, the underground beam 2 can be joined even to either place of this wide part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation structure suitable as a foundation for a building such as a steel-framed house, and more particularly to improving the strength of the building by integrating columns and underground beams. Can be designed with a degree of freedom according to the conditions of the construction site,
Furthermore, it does not cause strength reduction at the beam-column joint,
The present invention relates to a column base unit, a column-integrated column base fixing base structure using the column base unit, and a method of implementing the same.

[0002]

2. Description of the Related Art Conventionally, various types of structures and foundations are selected according to the required load-bearing capacity, ground surface condition, and environment of a construction site.
Roughly speaking, footing foundation, independent foundation, solid foundation and the like are selectively used. However, since these all use rebar as the member mainly receiving the load, it takes time to arrange the rebar, and the precise setting of the anchor bolts for fixing the structural frame installed on this foundation Also difficult to do. In the case of footing foundations or independent foundations, the excavation depth at the construction site, that is, the so-called root cutting dimension, must be taken deeply. In addition, in order to increase the excavation depth, in consideration of the workability of the steel reinforcement and the subsequent workability of assembling and removing the concrete formwork, a wide range (for example, a few hundred mm or more from the side of the foundation) ).
This not only imposes a heavy burden on the work of excavation work and the disposal of surplus soil, but also excavation for foundation work may cause troubles with residents of the neighboring land, for example, when it is significantly in contact with the border with the neighboring land. It could be the cause. In addition, it is not possible to move to steel frame construction until concrete has been cured and the foundation has been completely constructed, so that it has been necessary to take some construction time.

[0003] From such a background, the present inventor has disclosed the patent No. 2
It covers a number of patent applications, including 815605, "Basics for Construction and Methods for Enforcing It". These use section steel as a part of the strength member of the foundation, have good construction efficiency, can accurately set anchor bolts, can keep the height of the foundation low, have a small root cutting dimension, and have a narrow range. Since the excavation is sufficient, the above problem can be solved.

The invention related to Japanese Patent Application Laid-Open No. Hei 9-151463, entitled "Pillar-integrated Column Base-Fixed Foundation Structure and Method of Enforcing It", among the patent applications filed by the present inventors, relates to a foundation structure in which a pillar and an underground beam are integrated. The lower part of the pillar forms a part of the foundation, which can improve the strength of the building. In addition, even if the concrete has been cured and the foundation has not been completely constructed, Thus, the construction period can be shortened because the construction period can be shortened, which greatly contributes to improvement of construction quality and reduction of construction cost.

[0005]

[Technical Problems Attempted to Be Developed] The present invention was made as a part of the basic structure technology integrating the above-mentioned column and underground beam, and the technology was improved to further improve the reliability in terms of strength. It is an object of the present invention to develop a beam-to-column joint structure for a column-integrated column-base fixed foundation structure which is capable of improving the operability and extending the degree of freedom of design and which is excellent in overall performance and which is integrated with a column.

[0006]

According to a first aspect of the present invention, there is provided a column base unit wherein a diaphragm is provided transversely at a lower portion of a column and a base plate is further provided at a lower end portion of the column. It has a shape projecting wide in plan view in the direction in which the underground beams are connected, and a web is provided between the diaphragm and the base plate in the wide portion. According to the present invention, in the column base unit including the column member, the wide portion protruding from the column member is configured as a connection portion with the underground beam, so that any portion of the wide portion is underground. Beams can be joined.

According to a second aspect of the present invention, in addition to the above requirements, the diaphragm and the base plate are provided with holes for inserting underground piercing reinforcement. According to the present invention, the column base unit is fixed to the anchor bolt projecting from the root, and after the concrete is cast, the concrete filled between the diaphragm and the base plate can be integrated. it can.

[0008] Still further, the column base unit according to claim 3 is
In addition to the above requirements, the cross-sectional shape formed by the diaphragm, the base plate, and the web includes the cross-sectional shape of the underground beam. ADVANTAGE OF THE INVENTION According to this invention, while connecting a column base unit and an underground beam can be performed accurately and reliably, transmission of force between a column, a diaphragm and a base plate, and an underground beam becomes clear. Therefore, brittle destruction of the column base unit can be prevented.

Further, the column base unit according to claim 4 is
In addition to the above requirements, a reinforcing bar is welded and fixed to one or both of the upper surface of the diaphragm and the lower surface of the base plate. ADVANTAGE OF THE INVENTION According to this invention, a crack can be prevented at the upper part and side of concrete by an upper rebar, the lower rebar can function as a foundation beam bottom rebar, and concrete can be integrated with an anchor bolt and these rebars. Units can be configured.

According to a fifth aspect of the present invention, there is provided a column-integrated column-base fixing foundation structure using the column-base unit, wherein the underground beam is connected to a column erected in a root excavated in advance. A column base beam frame is formed, and concrete is cast in the root room so that the lower part of the column forms a part of a foundation structure.
The base structure uses the column base unit according to claim 1, 2, 3, or 4, and the end of the underground beam is brought into contact with the ends of the diaphragm, the base plate, and the web in the column base unit. In this state, the column base unit and the underground beam are integrally connected. According to the present invention, since the connection point of the column base unit with the underground beam is the end of the diaphragm, the base plate, and the web, the transmission of the force between the column base unit and the underground beam becomes clear. Therefore, brittle destruction of the column base unit can be prevented. In addition, by setting the position of the web in the column base unit to an arbitrary position in the width direction of the wide part, the connection point of the underground beam can be selected.

According to a sixth aspect of the present invention, in addition to the requirement of the fifth aspect, the column-integrated column-base fixing foundation structure using the column-base unit according to the sixth aspect further comprises a hole formed in the diaphragm and the base plate, and The underfill pile projecting from the bottom of the slab is inserted so that the concrete in the filled state is integrated between the diaphragm and the base plate. ADVANTAGE OF THE INVENTION According to this invention, while joining with an underground stake etc. and a pillar-integrated type column base fixing foundation structure can be improved, the crack of concrete can be prevented.

A column-integrated column-base fixing foundation structure using the column-base unit according to claim 7 is, in addition to the requirements described in claim 5 or 6, further comprising a support for the diaphragm, the base plate, the web, and the underground beam. The connection is characterized by being made by high strength bolted joints. According to the present invention, the working time is reduced as compared with the conventional joining by welding, and further, the strength is not reduced by the influence of heat.

Further, a column-integrated column-base fixing base structure using the column-base unit according to claim 8 in addition to the requirements according to claim 5, 6 or 7, an underground connected to the column-base unit. The concrete width around the beam is narrower than the concrete width around the column base unit. According to the present invention, the form of the foundation can be adapted to the situation at the construction site.

Further, a column-integrated column-base fixing base structure using the column-base unit according to claim 9 is the same as in the above-mentioned claims 5, 6, and 7.
In addition to the features described in 7 or 8, the core of the underground beam and the core of the column base unit are eccentric. According to the present invention, the form of the foundation can be adapted to the situation at the construction site.

According to a tenth aspect of the present invention, there is provided a method for constructing a column-integrated column-base fixing foundation structure using a column-base unit, wherein the underground beam is connected to a column which is erected in a root excavated in advance. While forming a column base beam frame which is a steel frame by the concrete, in the construction of the structure in which the lower part of the column forms a part of the foundation structure by casting concrete in the root room, Is the claim 1, 2,
The column base unit and the underground beam are used while the column base unit according to 3 or 4 is used, and the end of the underground beam is brought into contact with the end of the diaphragm, the base plate, and the web in the column base unit. Are integrally connected. According to the present invention, the connection point with the underground beam in the column base unit is a diaphragm,
Since the ends are the base plate and the web, the transmission of the force between the column base unit and the underground beam becomes clear, so that brittle breakage of the column base unit can be prevented. In addition, by setting the position of the web in the column base unit to an arbitrary position in the width direction of the wide part, the connection point of the underground beam can be selected.

According to a further aspect of the present invention, there is provided a method for constructing a pillar-integrated column base fixing foundation structure using a column base unit according to the present invention. By making the underground pile reinforcing bars protruding from the bottom of the root margin penetrated,
It is characterized in that concrete to be filled is integrated between the diaphragm and the base plate. ADVANTAGE OF THE INVENTION According to this invention, while joining with an underground stake etc. and a pillar-integrated type column base fixing foundation structure can be improved, the crack of concrete can be prevented.

According to a twelfth aspect of the present invention, in addition to the requirements of the tenth or eleventh aspect, the method of constructing a column-integrated column-base fixing foundation structure using the column-base unit is further provided. The connection with the beam is characterized by being performed by high-strength bolt joining. According to the present invention, the working time is reduced as compared with the conventional joining by welding, and further, the strength is not reduced by the influence of heat.

According to a thirteenth aspect of the present invention, in addition to the requirements of the tenth, eleventh, and twelfth aspects, the method of constructing a column-integrated column-base fixing foundation structure using the column-base unit is further provided. The concrete width around the underground beam
It is characterized in that it is narrower than the concrete width around the column base unit. According to the present invention, the form of the foundation can be adapted to the situation at the construction site.

Further, in accordance with the construction method of the column-integrated column-base fixing foundation structure using the column-base unit according to claim 14, in addition to the requirements according to claim 10, 11, 12, or 13, The core and the core of the column base unit are eccentric. According to the present invention, the form of the foundation can be adapted to the situation at the construction site. The above-mentioned problem is solved by using the requirements described in these claims.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on the illustrated embodiments. In this description, first, the configuration of the column-base unit 1 and the column-integrated column-base fixing foundation structure S using the column-base unit 1 will be described, and then the column-integrated column-base fixing foundation using the column-base unit 1. Structure S
The construction method is explained. The outline of the pillar-integrated column base fixing foundation structure S of the present invention is as follows. First, an underground beam 2 is connected to a column base unit 1 erected in a root 6 excavated in advance at a building site, thereby forming a column base beam frame F as a steel frame. Next, the concrete 7 is cast into the root room 6 so that the concrete 7 and the column base beam frame F are integrated, and the lower portion of the column base unit 1 forms a part of the foundation structure. An integrated column base fixing basic structure S is formed.

Hereinafter, the column-integrated column base fixing base structure S will be described in detail. First, the column unit 1 will be described. As shown in FIG. 3, as an example, the lower portion of a column 10 to which a square steel pipe is applied is divided once and divided into an upper column 10a and a lower column 10b. This is a pillar material that is provided with a diaphragm 11 provided transversely between the lower pillar 10b and a base plate 12 at the lower end of the lower pillar 10b.

The diaphragm 11 and the base plate 12 are plate members having the same planar shape, and are provided with holes 11a, 12a, and 12b for inserting underground reinforcing bars 8A and anchor bolts 9 at appropriate locations. I do. In addition, the diaphragm 11 and the base plate 12 have a shape that protrudes widely in plan view in the direction in which the underground beam 2 is connected as described later, and a web is provided between the diaphragm 11 and the base plate 12 in the wide portion. 1
3 is provided. The term “wide” means that the diaphragm 1
1 and that the width of the base plate 12 is longer than the width of the column 10. The direction in which the underground beam 2 is connected is determined according to the location where the column base unit 1 is installed. The direction is selected from the direction of the surface, the direction of two opposing surfaces of the column 10 as shown in FIG. 4B, or the direction of three surfaces of the column 10 as shown in FIG. 4C. Of course, the underground beam 2 may be connected in the directions of the four surfaces of the pillar 10.

The sectional shape formed by the diaphragm 11, the base plate 12, and the web 13 includes the sectional shape of the underground beam 2. Here, “including the cross-sectional shape of the underground beam 2” means that the cross-sectional shape formed by the diaphragm 11, the base plate 12, and the web 13 is the same as the cross-sectional shape of the underground beam 2 or that the diaphragm 11, the base plate 12 This means that the length is longer than the upper flange 21 and the lower flange 22 of the underground beam 2.

Further, an upper reinforcing bar 14 is fixed to the upper surface of the diaphragm 11 by welding.
The lower reinforcing bar 15 is welded and fixed to the lower surface of. The upper reinforcing bar 14 and the lower reinforcing bar 15 are welded to the diaphragm 11 and the base plate 12 by combining the reinforcing bars of, for example, about 12 mm in a grid pattern at an appropriate pitch using a binding wire 16 or by welding. It is. The configuration of the column base unit 1 is as described above, and includes a column 10, a diaphragm 11, a base plate 12, a web 13, an upper reinforcing bar 14, and a lower reinforcing bar 15.
Of the column base unit 1
It is transported to the construction site in the state of becoming.

Next, the underground beam 2 will be described. This is an example in which a section steel such as an H-section steel or an I-section steel is applied, and is perpendicular to the upper flange 21 and the lower flange 22. The web 23 is provided as described above. As the underground beam 2, a lattice beam in which a lattice is assembled on the web 23 may be used.

As an example, the underground beam 2 is fixed by welding an upper reinforcing bar 24 and a lower reinforcing bar 25 similar to the upper reinforcing bar 14 and the lower reinforcing bar 15 in the column base unit 1 to the upper flange 21 and the lower flange 22. Is what you do.

The underground beam 2 is assembled to the column base unit 1 to form a frame member of the column base beam frame F, and the diaphragm 11, base plate 12, and web 13 of the column base unit 1 are formed. Upper flange 21 and lower flange 22 of underground beam 2 with respect to the end
In a state where the ends of the web 23 are in contact with each other, the splices 3 are applied from both sides of the webs 23, and the bolt-and-nut 5 to which a high-strength bolt is applied is used, so that the column base unit 1
And the underground beam 2 are integrally connected.

As shown in FIG. 2, anchor bolts 9 are buried in advance on the bottom surface of the root 6 on which the column base unit 1 is erected. The streaks 8A project from the bottom of the root 6.

When the concrete 7 is poured into the root room 6 and curing is completed, the concrete 7 and the column base beam frame F are integrated, and the lower part of the column base unit 1 constitutes a part of the foundation structure. Thus, a pillar-integrated column-base fixing foundation structure S is constructed. In such a column-integrated column base fixing base structure S, focusing on the column base unit 1 in particular, as shown in FIG.
Since the underground reinforcement 8A is inserted into 2a, the filled concrete 7 can be integrated between the diaphragm 11 and the base plate 12.

Next, the "method of constructing a column-integrated column-base fixing foundation structure using a column-base unit" of the present invention will be described in detail. [Processing at the Factory] In constructing the pillar-integrated column base fixing base structure S of the present invention, it is preferable to process the constituent members in advance in the factory, and by performing such processing, the building It can simplify the work on the site, and is released from the hassle of so-called return work that repeatedly moves between the building site and the factory,
The foundation work can be completed by a single multifunctional mechanic. The objects to be processed in the factory are the column base unit 1 and the underground beam 2, and these processing will be described below.

(1) Preparation of Column Base Unit (See FIG. 3) The column base unit 1 is processed by dividing the lower portion of the column 10 to which the square steel pipe is applied once and dividing it into an upper column 10a and a lower column 10b. The diaphragm 11 is welded transversely between the upper pillar 10a and the lower pillar 10b, and the base plate 12 is welded to the lower end of the lower pillar 10b. Further, a web 13 is welded between the diaphragm 11 and the base plate 12 at a portion of the diaphragm 11 and the base plate 12 that protrudes widely in a plan view in the direction in which the underground beam 2 is connected.

The diaphragm 11 is provided with a plurality of holes 11a around the pillar 10. On the other hand, the base plate 12 has holes 11a in the diaphragm 11.
And a hole 12b for fixing the column base unit 1 to the root margin 6 is formed in a wider portion. A hole 13a for assembling the underground beam 2 is also formed in the web 13.

Further, the lower reinforcing bar 15 connected in a cross-girder manner with a binding wire is previously assembled to the lower surface of the base plate 12 by welding.

(2) Preparation of the underground beam (see FIG. 3) The underground beam 2 is formed by cutting a steel material into appropriate dimensions, and then mounting the column base on the upper flange 21, the lower flange 22, and the web 23. Bolt hole 21 for assembling to unit 1
a, 22a and 23a are drilled in advance. Further lower flange 2
Bottom reinforcing bar 2 connected in a girder shape with a binding wire to the lower surface of 2
5 is welded, and a spacer 26 is provided if necessary. Further, the upper reinforcing bar 24 fixed on the upper flange 21 at the site is also welded in a certain range in a cross-shaped combination.
4 is also welded to the upper flange 21.

[On-Site Work] (3) Root Forming (See FIG. 5) First, at the construction site, before constructing the pillar-integrated column-base fixed base structure S, the ground surface is dug to form a ridge 6. FIG. 2 shows a place where the column base unit 1 is installed.
The underground pile 8 as shown in FIG. This underground pile 8
From the diaphragm 11 in the column base unit 1.
At the position corresponding to the holes 11a, 12a formed in the base plate 12, the underground stake arrangement 8A used as the aggregate of the underground stake 8 is in a protruding state. Within the range that can be accommodated. An anchor bolt 9 is also driven into the bottom of the root 6 at a position corresponding to the hole 12b formed in the base plate 12 of the column base unit 1. Further, a level adjusting body 60 is provided in a portion where the pillar 10 is located, which is disclosed in Japanese Patent No. 2813605 "Foundation for construction and its execution method" by the present applicant. Although the description is omitted, the movable cup is screwed into a cylindrical fixed cup in a nested manner, and the protrusion length of the movable cup can be adjusted by adjusting the screwing. Next, the dumping concrete 6a is cast on the bottom of the root allowance 6, and after the casting is completed, the depth of the root allowance 6 becomes uniform, and the underground pile reinforcing bar 8A extends from the surface of the waste concrete 6a. , The anchor bolt 9 and the level adjusting body 60 are in a protruding state.

Such a construction method is an application of the aforementioned Japanese Patent No. 2813605 entitled "Construction foundation and its execution method", in which the strength member responsible for the load-bearing action of the construction foundation is shaped steel. Since the underground beam 2 is used, the height dimension can be set relatively smaller than the conventional standard, and the forming operation of the root margin 6 can be performed efficiently. In addition, Neshiro 6
Is small, it is only necessary to dig with a margin of about 100 mm from the side of the pillar-integrated column base fixing foundation structure S, so that the digging width of the root 6 can be set small.

Thereafter, a reference line is appropriately determined on the discarded concrete 6a by a transit or the like in accordance with the design dimensions, and a reference line in a running state or a reference line such as a pillar is marked.

(4) Loading of the pedestal unit (see FIGS. 2 and 6) The pedestal unit 1 processed in the factory in such a state.
And are attached to the underground pile arrangement 8A and the anchor bolt 9, and this operation will be described below. First, the pillars are arranged so that the underground stake arrangement 8A and the anchor bolt 9 projecting from the surface of the discarded concrete 6a are inserted into the holes 12a and 12b provided in the base plate 12 and the holes 11a provided in the diaphragm 11. The leg unit 1 is dropped from above, so that the load of the column base unit 1 is supported by the level adjuster 60. At this time, the underground stake arrangement 8A, which is the reinforcing steel used as the aggregate of the underground stake 8, penetrates through both the base plate 12 and the diaphragm 11, but extends widely in the direction in which the underground beam 2 is connected. The anchor bolt 9 located at the bent portion passes through only the base plate 12.

After the column base unit 1 is positioned by appropriately adjusting the reference line or the like, the lock nut 9 is fixed to the anchor bolt 9 only from the upper surface of the base plate 12.
A is tightened.

(5) Loading of Underground Beam (See FIG. 7) Under this condition, the underground beam 2 that has been processed in the factory is loaded and placed at an appropriate location according to the construction site. . This arrangement can be accurately performed by appropriately writing a reference line on the upper flange 21. afterwards,
The underground beam 2 is connected to the column base unit 1, and the upper flange 21 and the lower flange 22 of the underground beam 2 are connected to the ends of the diaphragm 11, the base plate 12 and the web 13 in the column base unit 1. In a state where the ends of the web 23 are in contact with each other, the splices 3 are applied from both sides thereof, and the column base unit 1 and the beam 2 are integrally connected by using a bolt nut 5 to which a high-strength bolt is applied. Is what you do.

At this stage, all the bolts and nuts 5
May be temporarily fixed without tightening the fastening. After the work of aligning the pillar with the pillar core is performed and the underground beam 2 is accurately assembled to the pillar base unit 1, the connection portion is fully tightened to obtain a fixed state. At the same time, the ends of the lower reinforcing bar 15 and the lower reinforcing bar 25 are connected to each other by a binding wire.

(6) Installation and Fixing of the Upper Reinforcing Bar Next, the upper reinforcing bar 24 machined at the factory is fixed on the upper flange 21 of the underground beam 2. Then, the ends of the upper reinforcing bars 14 and the upper reinforcing bars 24 on the diaphragm 11 and the adjacent upper reinforcing bars 24 for each of the underground beams 2 are welded and integrated.

(7) Formation of Column Base Frame (See FIGS. 3 and 7) The column base frame F is formed by sequentially connecting all the column base units 1 with the underground beams 2 in this manner. .

(8) Setting of Form (See FIG. 8) In such a state, the form 30 is set according to the design dimensions. Each of the form plates 31 is made continuous in the longitudinal direction by a joint fitting 33, and the opposing form plates 31 are held by a holding frame 34 so as to keep a constant interval. Also, formwork plate 31
The gap between the base material 6 and the roots 6 is filled and filled with holding sand 35 or the like, thereby holding the form plate 31.

(9) Casting concrete and removing formwork (see FIG. 8) After doing this, concrete 7 is cast according to a conventional method, and curing is performed for a certain period of time. Removing the frame 30 and holding sand 3
5 is removed, and appropriate earth and sand is poured into the space where the holding sand 35 was present, thereby completing the pillar-integrated column base fixing base structure S. By the way, such a pillar-integrated column base fixed foundation structure S
In the completed state, concrete 7 is cast to cover the column base beam frame F in a certain range as shown in FIGS.
The pillar 10 protrudes upward.

[0046]

[Other Embodiments] The present invention is based on the above-described embodiment, but the following embodiments may be adopted based on the technical idea of the present invention. it can.

[Embodiment in which core of underground beam is made different] First, the column-integrated column base fixing base structure S described in the above-described basic embodiment has, in plan view, the core of the column 10 and the beam. Although the two cores overlap each other, the core of the pillar 10 and the core of the beam 2 can be shifted. That is, the diaphragm 11 and the base plate 12
Has a shape projecting wide in a plan view in the direction in which the underground beam 2 is connected, so that the beam 2 can be connected to an arbitrary position in the width direction of the wide portion. In this case, the diaphragm 11 and the base plate 12
In order to make the cross-sectional shape formed by the web 13 and the cross-sectional shape of the underground beam 2, the position of the web 13 is changed as shown in FIG.
At a position corresponding to the web 23. Since the pillar-integrated column base fixing base structure S of the present invention can also adopt such a structure, a flexible design in consideration of pit accommodation and the like is possible.

[Embodiment in which the height dimensions of the underground beams are made different] The column-integrated column base fixing base structure S described in the basic embodiment described above is different from the web 13 of the column unit 1 in that The height dimension and the height dimension of the web 23 in the beam 2 were made the same, and the depth dimension of the column base beam frame F in the root 6 was made uniform over the entire area. However, the depth dimension of the column base beam frame F within the root margin 6 can be partially changed. That is, as shown in FIG. 11, an adapter beam 27 is interposed between the column base unit 1 and the beam 2, and this adapter beam 27 has dimensions of both ends of the web 27a in the column base unit 1 respectively. The height dimension of the web 13;
This is set so as to match the height of the web 23 in the beam 2. In this case, in the continuous foundation form, when the size of the column 10 is different (when it is desired to use beams 2 having different nominal dimensions), a rational and economical design is possible.

[0049]

According to the present invention, since the foundation structure in which the pillar and the underground beam are integrated has been improved, it is possible to further improve the reliability in terms of strength and extend the design flexibility. Can be.

[Brief description of the drawings]

FIG. 1 is a transparent plan view showing a pillar-integrated column base fixing foundation structure of the present invention.

FIG. 2 is an enlarged longitudinal sectional view showing the vicinity of a lower part of a column base unit in the column integrated column base fixed basic structure.

FIG. 3 is an enlarged perspective view showing the vicinity of a lower end of a column base unit in a column base beam frame.

FIG. 4 is a plan view showing various shapes of a diaphragm and a base plate.

FIG. 5 is an explanatory view showing step by step the method of constructing the column-integrated column base fixing foundation structure of the present invention, and is a perspective view showing a root margin.

FIG. 6 is a perspective view showing a state of a root margin into which a column base unit is carried.

FIG. 7 is a perspective view showing a column base beam frame assembled in the root room.

FIG. 8 is a perspective view showing a state of a root room where a formwork for concrete casting is installed.

FIG. 9 is a perspective view showing the completed pillar-integrated column base fixing base structure.

FIG. 10 is a side view showing an embodiment in which the underground beams have different cores.

FIG. 11 is a side view showing an embodiment in which the height of the underground beam is changed.

[Explanation of symbols]

 S Column-integrated column-base fixing foundation structure F Column-base beam frame 1 Column-base unit 10 Column 10a Upper column 10b Lower column 11 Diaphragm 11a Hole 12 Base plate 12a Hole 12b Hole 13 Web 13a Hole 14 Upper rebar 15 Lower rebar 16 Tying wire 2 Underground beam 21 Upper flange 21a Bolt hole 22 Lower flange 22a Bolt hole 23 Web 23a Bolt hole 24 Upper reinforcing bar 25 Lower reinforcing bar 26 Spacer 27 Adapter beam 27a Web 3 Splice 5 Bolt nut 6 Root room 6a Discarded concrete 7 Concrete 8 Underground pile 8A Underground pile arrangement 9 Anchor bolt 9A Lock nut 30 Formwork 31 Formwork plate 32 Upper edge 33 Joint fitting 34 Holding frame 35 Holding sand 60 Level adjuster

Claims (14)

[Claims] 1. A pillar material in which a diaphragm is provided transversely at a lower portion of a pillar and a base plate is further provided at a lower end portion of the pillar, wherein the diaphragm and the base plate are wide in a plan view in a direction in which an underground beam is connected. A column base unit having an overhanging shape, wherein a web is provided between the diaphragm and the base plate in the wide portion. 2. The column base unit according to claim 1, wherein holes are formed in the diaphragm and the base plate for inserting underground reinforcing bars. 3. The column base unit according to claim 1, wherein a cross-sectional shape formed by the diaphragm, the base plate, and the web includes a cross-sectional shape of an underground beam. 4. A reinforcing bar is welded and fixed to one or both of the upper surface of the diaphragm and the lower surface of the base plate.
The column base unit as described. 5. A column-base beam frame which is a steel frame by connecting an underground beam to a column erected in a root excavated in advance and casting concrete in the root. And a lower portion of the pillar forms a part of a foundation structure. The pillar base unit according to claim 1, 2, 3, or 4 is used for the foundation structure. A column base unit was used in which the column base unit and the underground beam were integrally connected with the end of the underground beam abutting against the end of the diaphragm, the base plate, and the web. Column-integrated column base fixed basic structure. 6. A filling state is provided between the diaphragm and the base plate by inserting an underground pile arrangement projecting from a bottom surface of the root margin into a hole formed in the diaphragm and the base plate. 6. A column-integrated column base fixing foundation structure using the column base unit according to claim 5, wherein concrete is integrated. 7. The column using the column base unit according to claim 5, wherein the connection between the diaphragm, the base plate and the web and the underground beam is performed by high-strength bolt joint. An integrated column base fixed basic structure. 8. The column base unit according to claim 5, wherein the concrete width around the underground beam connected to the column base unit is narrower than the concrete width around the column base unit. Column-integrated column base fixed foundation structure using 9. The column-integrated column using the column base unit according to claim 5, wherein the core of the underground beam and the core of the column base unit are eccentric. Leg fixed foundation structure. 10. A column-base beam frame which is a steel frame by connecting an underground beam to a column erected in a root excavated in advance and casting concrete in the root. In the construction of a structure in which the lower part of the pillar forms a part of a foundation structure, the pillar base unit according to claim 1, 2, 3 or 4 is used for the foundation structure. A column base unit characterized by integrally connecting the column base unit and the underground beam with the end of the underground beam abutting against the end of the diaphragm, base plate and web in the unit. Construction method of the pillar-integrated column base fixed foundation structure used. 11. A filling state is provided between the diaphragm and the base plate by inserting an underground pile arrangement projecting from the bottom surface of the root margin into the hole formed in the diaphragm and the base plate. The construction method of a pillar-integrated column-base fixed foundation structure using the column-base unit according to claim 10, wherein concrete is integrated. 12. The column-integrated column-base fixing using the column-base unit according to claim 10, wherein the connection between the diaphragm, the base plate and the web and the underground beam is performed by high-strength bolt joint. Construction method of foundation structure. 13. The concrete width around the underground beam connected to the column base unit is smaller than the concrete width around the column base unit.
13. A method for constructing a column-integrated column-base fixed foundation structure using the column-base unit according to 1 or 12. 14. The core of the underground beam and the core of the column base unit are eccentric.
14. A method for constructing a column-integrated column base fixed foundation structure using the column base unit according to 2 or 13.