JP2001262586A - Foundation structure of dwelling house - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an iron quantity to be used without dividing an undefloor part, and without regulating the undefloor effective depth in a foundation of a dwelling house. SOLUTION: This foundation structure forms a leg part Aa for installing a column B for supporting a column C of a building in at least an end part of a concrete foundation beam A, and integrally installs the column B in this leg part Aa so as to resist force acting on the column B. The concrete foundation beam A is formed by providing a cross-sectional shape set so that a width made to correspond to proof strength of the ground and vertical force and horizontal force acting on the building and strain caused by the action of force are restrained in an allowable range. The column B is constituted by integrally installing a pullout preventive member 3 in a lower part of a transmission member 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic structure of a house, and more particularly, to a basic structure of a house capable of shortening a construction period and utilizing a space under the floor.

[0002]

2. Description of the Related Art As a typical example of a foundation structure of a house, there is a convex-shaped cloth foundation in which concrete is cast at a building site to construct a foundation beam and a footing. In this foundation structure, when the house is a wooden building, a wooden base is mounted horizontally on the top of the foundation beam, and pillars and joists of the house are mounted on the base. It is common to attach columns and place floor panels.

[0003] The above-mentioned cloth foundation is generally used in houses and has an extremely convenient foundation structure. However, it is a problem of complexity such as the need to create a formwork and follow the order of construction to achieve a convex cross section by cast-in-place concrete, and it is a place to attach a wooden base and steel columns There is a problem that the level of the top end of the poured concrete is hard to come out, and it is necessary to perform the work of top end leveling again after demolding, which complicates the work.

[0004] As a basic structure of a house that can solve the above problem, a rising portion (foundation beam portion) in a cloth foundation is H
There has been proposed a foundation that uses concrete as the footing part, instead of a steel foundation beam made of shaped steel. In this foundation structure, a plurality of steel foundation beams are arranged in a grid pattern in accordance with the foundation plan of the target house, and connection parts that abut on the ends of the steel foundation beams or on the way are joined by bolts and the like. After arranging reinforcing bars in the plane defined by the arranged steel foundation beams, concrete is cast and the lower part of the steel foundation beams is buried, and all steel foundation beams are integrated. It constitutes a solid foundation.

[0005] In the foundation structure configured as described above, the top of the steel foundation beam is continuous, and there is no great difficulty in setting the top to the same level. For this reason, there is an excellent aspect that leveling after construction is unnecessary and the durability of the steel foundation beam is good. In addition, since the accuracy of the top end level of the steel foundation beam is guaranteed and continuous, it can cope with the case where the pillars constituting the building body are installed at any positions, and the pillars can be used. There is also an excellent aspect that it can sufficiently oppose the pulling force and the compressing force acting on the surface.

Further, by using a solid foundation, the depth of the foundation can be reduced as compared with the case of a cloth foundation.
It is also possible to reduce the amount of soil excavation to reduce the earth removal process.

[0007]

As described above, in a solid foundation structure using a steel foundation beam, operations such as joining a reinforcing steel to a lower flange of a steel foundation beam and arranging stud reinforcement are required. This causes a problem that the workability is reduced.
In addition, the number of contact surfaces between steel and concrete increases, and it is necessary to perform processing (processing to prevent direct contact between the two) in order to ensure durability, which complicates the operation. In addition, in order to secure the required bending rigidity, a relatively large H-beam is required for use as a house beam, and construction cannot be performed without using heavy equipment, and further, a large H-beam is required. There is also a cost issue.

Further, since the underfloor space is divided into a lattice shape by the steel foundation beams, it is necessary to devise a maintenance inspection under the floor (for example, forming a manhole in the steel foundation beams). In addition, due to the shallow effective depth under the floor, it is necessary to consider the accommodation when installing underfloor storage and setting up elevator pits. In such a case, it is necessary to lower the top end of the steel foundation beam, and there is a problem that the performance as a beam is deteriorated and disadvantageous as compared with a general part.

An object of the present invention is to provide a basic structure of a house which can improve workability, facilitate maintenance and inspection of a space under the floor, and reduce the amount of iron used.

[0010]

According to the present invention, there is provided a foundation structure for a house according to the present invention, wherein at least an end of a concrete foundation beam is provided with a leg for attaching a support for supporting a pillar of a building. The column is integrally attached to the leg so as to oppose a force acting on the column.

[0011] In the above-mentioned basic structure of a house, a leg for mounting a pillar for supporting a pillar of a building is formed at least at an end portion of the concrete foundation beam. Since it is integrally attached so as to be able to oppose a force such as a compressive force, after attaching a column constituting a building frame to a column, a compressive force or a vertical force or a horizontal force acting on the column is applied to the column. When a pulling force is applied,
These forces can be transmitted to and supported on the concrete foundation beam via the pillar, and the pillar does not fall down and the concrete foundation beam does not break out.

The concrete foundation beam is set to have a width corresponding to the strength of the ground and vertical and horizontal forces acting on the building, and a strain generated by the action of the force within an allowable range. It is formed with a cross-sectional shape. Although such a cross-sectional shape cannot be uniquely set, it is preferable that the cross-sectional shape be a rectangle including a rectangle and a square in consideration of the number of steps constituting a form when concrete is cast on site. By forming the concrete foundation beam in such a shape, it is easy to arrange reinforcing bars and it is difficult for cracks to be formed. For this reason, it can be preferably applied to a long-life house (long-life house) whose service life is set to 50 years or more.

[0013] In the above-mentioned foundation structure, the column is installed so as to protrude from the top end of the concrete foundation beam, and a gap is formed between the top end of the concrete foundation beam and the top end of the column. For this reason, it is possible to enter the underfloor space from the gap, thereby facilitating maintenance inspection under the floor. Also, by using concrete foundation beams as described above,
There is no need to use a solid foundation structure, and as a result, the depth under the floor is not defined by concrete, and there is no need to consider the fit when storing under the floor or installing an elevator.

Further, since the foundation can be constructed by integrally attaching the column supporting the column to the concrete foundation beam, the top of the column is extremely small in size and light in weight as compared with the column constituting the frame. By adjusting the end level, a level can be obtained as a basis, and work becomes easy. Particularly, the work can be facilitated because the position of the pillar can be set and the level of the pillar can be set without directly attaching the pillar to the concrete foundation beam.

[0015] In the above-mentioned basic structure, it is preferable that the support is arranged immediately below a column set in a building. In such a foundation structure, the frame of the building can be configured by attaching columns directly to individual columns.

If there is a possibility that a column needs to be provided in a portion other than the leg portion of the concrete foundation beam, the corresponding portion may be set to a sufficient strength.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the above-mentioned basic structure of a house will be described below with reference to the drawings. FIG. 1 is a perspective view illustrating the overall configuration of the basic structure. FIG. 2 is a diagram for explaining the relationship between the foundation structure and a part of a building formed on the top of the foundation. FIG. 3 is a diagram illustrating an example of a support. FIG. 4 is a view for explaining a structure in which the columns and the concrete foundation beams are integrated. FIG. 5 is a view for explaining a configuration in which a space between the lower part of the outer wall and the concrete foundation beam is covered.
FIG. 6 is a view for explaining another example of the structure for integrating the pillar and the concrete foundation beam.

In the foundation structure according to the present embodiment, at least at the end of the concrete foundation beam, a leg portion is provided immediately below a column constituting a frame of a house, and a leg portion for attaching a column supporting the column is formed. It is constructed by integrally attaching a column to the legs, and the footing and the mechanical function of the foundation beam in the conventional cloth foundation, or the solid concrete in the conventional steel beam solid foundation And H-shaped steel are replaced by concrete foundation beams, and the structural function for supporting columns in these conventional foundations is replaced by columns.

As shown in FIGS. 1 and 2, the foundation structure according to the present embodiment has a concrete foundation beam A having a leg Aa formed at least at an end, and a column B is integrally formed on the leg Aa. It is configured to be attached. Here, the concrete foundation beams A are set corresponding to the linear portions of the foundation. In FIG. 1, the columns B are arranged at both ends and intermediate portions of the individual concrete foundation beams A. I have. Therefore,
The concrete foundation beam A in each direction shares the support B arranged at the crossing portion. In particular, the pillar B is disposed immediately below all the pillars C constituting the skeleton of the house,
Therefore, the leg portions Aa are also formed corresponding to the positions of all the columns C.

The concrete foundation beam A is provided for each street of the foundation (outside street of the outer periphery of the foundation, square street in FIG. 1, middle street inside the street, and cross street in FIG. 1). It is connected to each other at a position where it is installed and comes into contact with the concrete foundation beam A installed as another way. In particular, the concrete foundation beam A has an optimal width dimension to resist forces such as the ground strength of the ground on which the house is built, the weight of the house, and the horizontal force that is expected to act on the house. In addition, the concrete foundation beam A has a height dimension capable of realizing a cross-sectional shape that does not generate a distortion exceeding a preset allowable distortion range.

For this reason, the concrete foundation beam A is formed to have a square cross section including a square and a rectangle. Concrete foundation beam A having such a sectional shape
Then, after the on-site ground work is completed, the form of the formwork when placing concrete is simplified, and the construction is easy. In addition, the concrete foundation beam A is regulated such that the depth at which the ground is excavated during construction is deeper than that of the solid foundation. That is, in the concrete foundation beam A, it is essential that the height dimension is a value larger than the regulation value, and the concrete foundation beam A exhibits sufficient rigidity against a force that is expected to act vertically and horizontally. Possible shapes can be easily set.
Therefore, there is an advantage that it is not necessary to provide a solid foundation.

The concrete foundation beam A has a leg Aa at least at an end. The shape of the leg portion Aa is not particularly limited, and may be the same shape as another portion of the concrete foundation beam A (a portion where the column B is not attached). In short, the leg portion Aa is a portion to which the column B is integrally attached.

It is essential for the concrete foundation beam A to be integrally attached with at least one column B at its end, but the number of columns B to be attached is not limited. As shown in FIG. 1, a concrete foundation beam A for each street may have four columns B attached thereto. As described above, the number of the pillars B attached to the concrete foundation beam A differs depending on the target house, and cannot be uniquely set.

Here, the target house is a steel-frame two-story building.
When an ALC (lightweight cellular concrete) panel is used as the outer wall panel 5, the foundation structure of the present embodiment uses the concrete foundation beam A. Therefore, the embedding depth of the concrete foundation beam A with respect to the ground is 27 cm according to the regulation. Become. Therefore, the excavation is excavated at a depth equal to or more than the above-described depth along the installation site of the concrete foundation beam A, and the excavation site is set to a depth of 27 cm by performing a predetermined groundwork. However, the height of the concrete foundation beam A is not limited to this dimension, and it is natural that the height should be set in accordance with the ground conditions, the weight of the building, the assumed horizontal force, and the like.

Further, in the concrete foundation beam A in this embodiment, the height (beam length) is set to 30 cm. For this reason, the top level of the concrete foundation beam A is set 3 cm higher than the ground level (GL).

The column B is disposed immediately below all the columns C constituting the frame of the target house, and is connected to the column C to transmit a vertical force or a horizontal force acting on the column C to the concrete foundation beam A. Having.

For this reason, as shown in FIG. 3, the column B has a top plate 1 for mounting the column C and an upper end fixed to the top plate 1 by means of welding or the like, and a force acting on the top plate 1 is applied to the concrete. And a transmission member 2 for transmitting to the foundation beam A. In addition, the column B is pulled out of the concrete foundation beam A by the pull-out force acting on the column B with the horizontal force acting on the column C.
The pull-out preventing member 3 is arranged at the lower end of the transmission member 2 constituting the support B and is connected directly or integrally via the connection plate 4 in order to prevent the transmission member 2 constituting the support B from being pulled out.

The pillars B have the function of connecting the pillars C, and are disposed between the adjacent pillars B, and support beams 7 for supporting the outer wall panel 5 and the floor panel 6, and foundation beams corresponding to the entrance and the piloti garage. 8 is also provided.

For this reason, the top end level of the top plate 1 constituting the column B is set in accordance with the conditions such as the floor level and floor structure set in advance in the target house. In particular,
It is preferable that the top level of the top plate 1 to which the column C is attached and the top level of the receiving beam 7 supporting the bottom surface of the floor panel 6 match. In addition, how high the floor is set from GL is a design problem corresponding to each house and should not be limited.

In this embodiment, regardless of the floor level,
The top level of the top plate 1 and the receiving beam 7 is set to GL + 40 cm. This numerical value is generally used for configuring a normal floor and ensuring ventilation under the floor.

Therefore, a dimensional difference of 37 cm occurs between the top ends of the top plate 1 and the receiving beam 7 and the top end of the concrete foundation beam A, and a gap is formed by subtracting the height of the receiving beam 7. You.
That is, when the height of the receiving beam 7 is 100 mm,
A gap of 27 cm is formed between the lower end of the concrete foundation beam A and the top end of the concrete foundation beam A, so that the worker can easily pass when performing maintenance inspection under the floor.

In the column B having the above functions,
The top plate 1 is formed with a bolt hole 1a for inserting a bolt (not shown) used when attaching the column C.

The transmission member 2 is formed in a cross shape and with a sufficient cross sectional area so as to sufficiently counteract the horizontal force expected to act, and is formed in a cross shape. Each of the pieces has a plurality of holes 2a at predetermined intervals. Through the hole 2a, a receiving beam 7 supporting the outer wall panel 5 and the floor panel 6 and a foundation beam 8 corresponding to the entrance or the garage of the piloti are connected.

The receiving beam 7 and the foundation beam 8 have different top levels. For this reason, by forming a plurality of holes 2a in a piece of the transmission member 2 in advance, it is possible to select and use an optimal hole 2a according to the top level set for each of the beams 7, 8. It is.

The pull-out preventing member 3 is integrally attached to the transmission member 2 and has a function of transmitting the pull-out force acting on the column B to the concrete foundation beam A. It has a structure that can be stopped.

Concrete foundation beam A of pull-out preventing member 3
Means that the pull-out preventing member 3 is buried in the concrete foundation beam A and integrated therewith (first described later).
Example), and a state where they are fastened to an anchor bolt embedded in the concrete foundation beam A while being mounted on the concrete foundation beam A (second embodiment described later) or an anchor nut and integrated. Yes, these structures can be appropriately selected and configured according to the force acting on the column B.

For example, in the column B shown in FIG. 3A, the pull-out preventing member 3 is made of an H-shaped steel which is sufficiently longer than the cross-sectional dimension of the transmitting member 2, and the pull-out preventing member 3 and the transmitting member 2 are formed. It is integrally attached to the column B via a connection plate 4 disposed between the two. That is, the connection plate 4 is welded to the lower end of the transmission member 2, and the connection plate 4 and the pull-out prevention member 3 are integrally attached by welding or using bolts and nuts.

In the column B shown in FIG. 3B, the pull-out preventing member 3 is constituted by a flat plate having a size sufficiently larger than the plane size of the transmission member 2. 2 are integrally attached by welding to the lower end.

Further, in the column B shown in FIG. 3C, the pull-out preventing member 3 is constituted by a plurality of flat plates having dimensions substantially equal to the top plate 1 and these flat plates are connected to the transmission member 2.
Are integrally attached by welding at the lower end and at a position separated from the lower end by a predetermined distance upward.

As described above, the column B and the pull-out preventing member 3
The shape and structure are not particularly limited, and can be appropriately set according to the arrangement position on the foundation, the weight of the house, and the magnitude of the applied vertical force and horizontal force.
In particular, as shown in FIG. 1, the pull-out preventing member 3 attached to the column B disposed at the corner has an L-shaped planar shape corresponding to each concrete foundation beam A.

In the above foundation structure, the vertical force acting on the column C transmitted to the column B is supported by the concrete foundation beam A. At this time, since the concrete foundation beam A has a width dimension necessary for transmitting the force and the height is constant over the entire width, the vertical force is evenly transmitted to the ground and supported. That is, the reaction force acting on the concrete foundation beam A becomes uniform. Therefore, even if a compressive force acts on the concrete foundation beam A by acting on the vertical force, the concrete foundation beam A can be stably supported, and the concrete foundation beam A is not partially broken.

When a force is applied to the support B in a direction of pulling the support B out of the concrete foundation beam A due to the horizontal force acting on the support C, the transfer member 2 constituting the support B is directly or connected to the connecting plate. Since the pull-out preventing member 3 attached via the base member 4 is integrally attached to the concrete foundation beam A, the pull-out preventing member 3 can be countered by the shear strength or the tensile strength of the pull-out preventing member 3, and the column B can be used as the concrete foundation. It is not pulled out of the beam A or falls down.

Next, referring to FIGS. 1 to 5, the basic structure according to the first embodiment, in particular, the structure of the reinforcing bar buried in the concrete foundation beam A and the binding structure between the receiving beam 7 and the concrete foundation beam A will be specifically described. The construction procedure will be explained together. When building a foundation, first, a target house is designed. Therefore, in the following description, it is assumed that the design of the house has already been completed, the position of the pillar, the position of the entrance, and the like have been determined, and the ground work and positioning of the site have been completed according to the base plan.

In this embodiment, a plurality of columns B disposed immediately below columns C constituting a skeleton are embedded in legs Aa of a concrete foundation beam A.

First, the columns B are arranged corresponding to the installation positions of the columns C constituting the frame of the house. At this time, each support B
A PC board 9 for leveling is installed every time, and the columns B are raised and arranged on the PC board 9 respectively. At this time, each of the columns B has the pull-out preventing member 3 integrally attached to the lower end side of the transmission member 2. The PC board 9 is buried in the concrete foundation beam A together with the support B. For this reason, the height of the column B including the pull-out preventing member 3 is set to a value obtained by subtracting the thickness of the PC board 9 from a value obtained by adding the height of the top end of the top plate 1 and the height of the concrete foundation beam A. You.

After the arrangement of all the columns B is completed, the top ends of all the columns B are set to the same level while adjusting the height of the top plate 1 of each column B. In this state, the individual columns B are temporarily fixed by fastening nuts to bolts (not shown) embedded in the PC board 9.

Next, the reinforcing bar cage 10 is arranged corresponding to the installation site of the concrete foundation beam A. The rebar basket 10 is assembled in advance at the factory stage, or is used by assembling three-dimensional rebars produced in advance at the factory stage three-dimensionally on site. This reinforcing bar cage 10 is composed of a plurality of longitudinal bars 10a arranged in the longitudinal direction, and band bars (shear reinforcing bars) 10b connecting these longitudinal bars 10a.

The width and height of the reinforcing bar 10 are set in accordance with the predetermined cross-sectional dimensions of the concrete foundation beam A, and the length of the concrete basket 10 is irrespective of the length of the concrete foundation beam A. The distance is set according to the distance between adjacent columns B arranged on the foundation beam A. That is, steel cage 10
Is disposed between the adjacent columns B, the reinforcing bar cage 10 does not reach both ends of the column B, and maintains a position separated from the column B by a predetermined distance.

Generally, the interval between the pillars C is regulated by the module size set in the house. For this reason, the length of the reinforcing cage 10 is also regulated by the module size, and can be standardized. Therefore, it is possible to manufacture the reinforcing rod cage 10 at the factory stage, and it is possible to obtain the reinforcing rod basket 10 having stable quality and high reliability. This means
The reliability of the concrete foundation beam A constituted by using the reinforcing bar 10 is also improved.

When the reinforcing rod cage 10 is disposed between the columns B, the end of the disposed reinforcing rod cage 10 is located at a distance from the column B. For this reason, in the direction of a straight line,
It is necessary to join the reinforcing bar cages 10 arranged in the character direction to each other. This joining is performed by joining the longitudinal bars 10a of the reinforcing bar cage 10 by a plurality of longitudinal bars 11 arranged so as to sandwich the column B, and joining the longitudinal bars 11 by the band bars 12.

In this embodiment, the reinforcing bars are formed by the vertical bars 11.
When joining 10, the vertical streak 11 is not fixed to
11 and the support B are in an insulated state. However, the present invention is not limited to this configuration, and the vertical stripe 11 may be fixed to the column B or a part of the pull-out preventing member 3 by welding or the like.

As described above, it is possible to install the columns B and arrange the reinforcing bars. Here, as described above, the work of setting the level of the top plate 1 of the column B does not necessarily have to be performed before performing the reinforcing work, but may be performed after performing the reinforcing work. It is.

FIG. 4 illustrates the relationship between the columns B, the reinforcing bars 10 and the concrete foundation beams A which are arranged on the middle and outer streets as described above.

FIG. 3A shows the relationship between the support B arranged on the middle concrete foundation beam A and the reinforcing cage 10. The support B is arranged at the center in the width direction, and the support B is arranged.
Reinforced basket 10 in the width direction of concrete foundation beam A
Of the vertical streaks 10a. FIG. 3C has the same configuration as that of FIG.

FIG. 5B shows the relationship between the support B and the reinforcing bar 10 arranged on the concrete foundation beam A on the outside street. The support B is arranged at a position deviated to the outside of the concrete foundation beam A. However, reinforced cage 10 is concrete foundation beam A
It is arranged approximately at the center.

In particular, it is preferable to connect the receiving beam 7 and the foundation beam 8 to the column B after all the columns B are arranged and before the concrete for constructing the concrete foundation beam A is cast. By connecting the receiving beam 7 and the foundation beam 8 to the column B in advance, it is possible to secure the stability of each column B.

The receiving beam 7 has a function of supporting the outer wall panel 5 and the floor panel 6 when it is arranged outside, and has a function of supporting the floor panel 6 when it is arranged inside. For this reason, as the receiving beam 7, an H having a dimension enough to withstand the weight of the outer wall panel 5 and the floor panel 6 to be supported.
It is composed of shaped steel.

The receiving beam 7 and the base beam 8 are connected by abutting the respective webs with the piece of the transmission member 2 of the column B and fastening the plate 13 with bolts and nuts 14.

The receiving beams 7 support the floor panels 6, and the ends of the plurality of floor panels 6 are placed. Therefore, the receiving beams 7 are bent by the load of each floor panel 6 acting thereon. . For this reason, it is connected to the concrete foundation beam A at a substantially central position in the longitudinal direction of the receiving beam 7 or at a plurality of positions in the longitudinal direction,
It is preferable that the receiving beam 7 is supported by the concrete foundation beam A.

In this embodiment, as shown in FIG. 2, a receiving beam support member 15 is disposed substantially at the center of the receiving beam 7, and the top end of the concrete foundation beam A and the receiving beam 7 are supported by the receiving beam supporting member 15. By connecting the lower ends, the load acting on the receiving beam 7 can be transmitted to and supported by the concrete foundation beam A.

The receiving beam support member 15 has a strength that can withstand the force acting on the mounting portion with respect to the receiving beam 7 and a bending strength and a bending rigidity that can withstand the horizontal force transmitted through the receiving beam 7. It is necessary, and the shape is not limited as long as the strength can be exhibited.

For this reason, the receiving beam support member 15 of this embodiment is
Has a length corresponding to the dimension of the gap formed between the lower end of the receiving beam 7 and the top end of the concrete foundation beam A, and has a U-shaped side view in which flanges 15a are formed at both ends in the longitudinal direction. And a flange 15a connected by a stiffener 15b.

The receiving beam supporting member 15 is previously fixed to the lower flange of the receiving beam 7 by means of bolts and nuts 14 or by welding, and the lower flange 15a serving as a free end is previously embedded in the concrete foundation beam A. Bolt 16 is attached.

As described above, the pillar C constituting the frame of the house
The strut B is arranged just below the top to adjust the top end level, and the reinforcing bar cages 10 are respectively arranged between the adjacent struts B, and the arranged reinforcing bar cages are connected by the vertical bars 11 and the band bars 12, Furthermore, after the receiving beam 7 and the foundation beam 8 are arranged between the adjacent columns B and connected by the plate 13, a mold (not shown) is arranged corresponding to the installation position of the concrete foundation beam A. Pour concrete.

By placing concrete in the formwork, the support B including the pull-out preventing member 3, the PC board 9, the reinforcing bar
10. An embedding bolt 16 attached to the lower flange 15a of the receiving beam support member 15 is embedded inside the concrete foundation beam A. The concrete poured into the formwork is removed from the mold after a predetermined curing period elapses, thereby forming a concrete foundation beam A in which the above members are embedded and integrated.

When the concrete foundation beam A is made of cast-in-place concrete as described above, the top level of each column B maintains the accuracy set in advance, and the column C can be used without leveling again. Can be attached. Similarly, the accuracy of the level of the receiving beam 7 is ensured, and the outer wall panel 5 and the floor panel 7 can be mounted following the mounting of the column C.

In the above construction, the support B has an upper portion projecting from the top end of the concrete foundation beam A, and the receiving beam 7 is entirely exposed. A large gap is formed, and as described above, it becomes possible for an operator to easily pass when performing maintenance and inspection of equipment and piping installed under the floor or maintenance and inspection of a building.

However, it is not preferable that the underfloor is always open as a house. For this reason, the receiving beam 7
The decorative panel 16 and the corner panel 17 (see FIG. 1) are attached when the outer wall panel 5 is attached to the vehicle.

When closing the gap formed between the receiving beam 7 and the concrete foundation beam A by the decorative panel 16 and the corner panel 17, the structure for attaching the panels 16 and 17 is not particularly limited. For example, when the decorative panel 16 is attached to the column B, as shown in FIG. 5, a bracket 18 is attached to a hole 2a formed in a piece of the transmission member 2 of the column B with a bolt and a nut 14, and the decorative panel 16 is attached to the bracket 18. Can be attached. The corner panel 17 can be attached to the column B in the same manner.

Since the decorative panel 16 is lightweight,
It is not always necessary to directly attach to the support B,
It is also possible to attach a stay (not shown) to the web or the lower flange, and attach the decorative panel 16 by this stay.

In particular, when a part of the decorative panel 16 is configured to be detachable from the outside for maintenance inspection under the floor, the stay is attached to the receiving beam 7 as described above, and the stay is externally attached to the stay. It is possible to configure so that the decorative panel can be attached and detached by fastening bolts from the bottom.

In the first embodiment, the pull-out preventing member 3
Is buried in the concrete foundation beam A made of cast-in-place concrete, but it is not always necessary to bury the pillar B in the concrete foundation beam A.

Next, the structure of the second embodiment in which the support B is mounted on the top end of the concrete foundation beam A and integrally attached thereto will be described with reference to FIG. In the drawing, the same portions and portions having the same functions as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the figure, a base plate 20 is previously arranged at a lower portion of the concrete foundation beam A at a position where the column B is to be attached to the concrete foundation beam A, and one end is attached to the base plate 20 and the other end is attached thereto. An anchor bolt 21 that penetrates the concrete foundation beam A in the height direction and protrudes is embedded. The plate-shaped pull-out preventing member 3 welded to the transmission member 2 of the column B is fastened to the anchor bolt 21, whereby the column B is integrally attached to the concrete foundation beam A.

Therefore, even when a vertical force or a horizontal force acts on the column B, these forces are transmitted to and supported by the concrete foundation beam A via the anchor bolts 21 and the base plate 20, and these forces are applied. Therefore, the concrete foundation beam A is not broken, and the column B is not pulled out or falls down.

This embodiment is not a structure in which the pillar B is buried in the concrete foundation beam A. For this reason, the rebar buried in the concrete foundation beam A does not necessarily have to be the rebar basket 10 in the first embodiment, and may be constructed by arranging rebar in the same manner as ordinary cast-in-place concrete.

In the case of the concrete foundation beam A made of cast-in-place concrete, the accuracy at the top level is low. For this reason, when attaching the pillars B, it is necessary to set the level for each pillar B. In this case, for example, a wooden frame substantially equal in size to the pull-out preventing member 3 attached to each column B is formed, and the column B is inserted into the anchor bolt 21 and the wooden frame is arranged around the column B and the concrete foundation beam A. In addition, it is possible to maintain the mounting level by leveling the column B and filling the wooden frame with non-shrinkable mortar. Also, without being limited to this method,
By using a known technique, it is possible to level each pillar B and attach it to the concrete foundation beam A.

[0078]

As described above in detail, in the foundation structure according to the present invention, after the pillars constituting the building frame are attached to the pillars, the pillars are compressed by the vertical and horizontal forces acting on the pillars. When a force or a pull-out force is applied, these forces can be transmitted to and supported on the concrete foundation beam via the pillar, and the pillar does not fall down and the concrete foundation beam does not break out.

Further, since the foundation can be constructed by integrally attaching the column supporting the column to the concrete foundation beam, the size of the column is extremely small and lightweight compared to the column constituting the frame. By adjusting the end level, a level can be obtained as a basis, and work becomes easy. Particularly, the work can be facilitated because the position of the pillar can be set and the level of the pillar can be set without directly attaching the pillar to the concrete foundation beam.

Further, the concrete foundation beam has a width dimension and a height dimension corresponding to conditions such as ground strength of the ground, the weight of the building, and horizontal force assumed to act on the building. For this reason,
The cross section of the concrete foundation beam has a square shape including a square and a rectangle, and it is possible to increase the amount of buried reinforcing bars, and accordingly, the proof strength can be increased. For this reason,
Even when used for a long time, there is no crack, which is advantageous when applied to a long-life house whose service life is set to 50 years or more.

Further, the column is installed so as to protrude from the top of the concrete foundation beam, and a gap is formed between the top of the concrete foundation beam and the upper end of the column. For this reason,
It is possible to enter the underfloor space from the gap, thereby facilitating maintenance inspection under the floor. In addition, since it is not a solid foundation structure, the depth under the floor is not defined by concrete, and there is no need to consider the fit when storing the floor or installing an elevator.

Further, there are the following advantages as compared with the case where a steel foundation beam is used. That is, since it is not necessary to integrate the steel beam and the concrete, the work related to the operation of connecting the reinforcing steel to the steel beam is not required, and the construction is simplified. In addition, there is no need to embed the steel beam in the concrete, and a treatment for ensuring the durability of the steel is not required. Since the steel beam is not moved, no heavy equipment is required, the cost for this can be reduced, and the amount of iron required for the steel beam can be reduced to reduce the cost.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an overall configuration of a basic structure.

FIG. 2 is a diagram illustrating a relationship between a foundation structure and a part of a building formed on an upper portion of the foundation.

FIG. 3 is a diagram illustrating an example of a support.

FIG. 4 is a view for explaining a structure for integrating a pillar and a concrete foundation beam.

FIG. 5 is a diagram for explaining a configuration in which a space between a lower portion of an outer wall and a concrete foundation beam is covered.

FIG. 6 is a view for explaining another example of a structure for integrating a pillar and a concrete foundation beam.

[Explanation of symbols]

 A Concrete foundation beam Aa Leg B Support C column 1 Top plate 1a, 2a hole 2 Transmission member 3 Pull-out prevention member 4 Connection plate 5 Exterior wall panel 6 Floor panel 7 Receiving beam 8 Base beam 9 PC board 10 Steel cage 10a, 11 Vertical Bar 10b, 12 Bar 13 Plate 14 Bolt, Nut 15 Beam support member 15a Flange 15b Stiffener 16 Decorative panel 17 Corner panel 18 Bracket 20 Base plate 21 Anchor bolt

Claims (2)

[Claims] At least one end of a concrete foundation beam is formed with a leg for mounting a column supporting a column of a building, and the leg is integrally formed with the column so that the column can oppose a force acting on the column. The basic structure of a house, which is attached to the building. 2. The basic structure of a house according to claim 1, wherein the pillar is disposed immediately below a pillar set in a building.