JP2001064980A - Foundation of building and its construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply construct the foundation of a building in a short period by joining a pressure-proof board part and a rise part, joining the building on the upper part of the rise part, arranging an oblique material over the lower part of the rise part and the building, and joining both the ends of the oblique material on the lower part of the rise part and the building respectively. SOLUTION: A concrete-made pressure-proof board part 21 is installed on ground 1 so as to correspond to the installment span of a building unit 11. A moisture-proof film 23 is laid on the whole underfloor face of a unit building 10, and plaster mortar 24 is placed thereon. Next, a metal-made rise part 25 separated from the pressure-proof board part 21 is pin-jointed on the load receiving part 21A of the pressure-proof board part 21 by anchors and nuts. The leg part 12A of the column 12 of the building unit 11 is pin-jointed on the upper part of the rise part 25 by tightening bolts 27. Furthermore, an oblique material 28 is arranged over the lower part of the rise part 25 and the floor beam 13 of the building unit 11, and both the ends of the oblique material 28 are pin- jointed on the lower part of the rise part 25 and the floor beam 13 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation for a building and a method for constructing the same.

[0002]

2. Description of the Related Art Conventionally, as described in Japanese Patent Application Laid-Open No. 9-60005, the foundation of a building comprising a concrete pressure plate portion installed on the ground and a metal rising portion separated from the pressure plate portion. , There is a structure in which rising portions of adjacent foundations are connected with a joining material.

[0003]

However, in the prior art, the joining material connecting the rising portions of the adjacent foundations prevents the adjacent foundations from overturning, but the underlay between the adjacent foundations does not fall. It will be an obstacle to breaks and plumbing work under the floor.

An object of the present invention is to make it possible to construct a foundation of a building simply and in a short period of time, and to prevent the foundation from falling down without dividing under the floor.

[0005]

According to the present invention, there is provided a foundation for a building comprising a concrete pressure plate portion installed on the ground and a metal rising portion separated from the pressure plate portion. , The pressure plate and the riser are joined together, and the building is joined to the upper part of the riser,
The diagonal material is arranged over the lower part of the rising part and the building, and both ends of the diagonal material are joined to the lower part of the rising part and the building, respectively.

According to a second aspect of the present invention, in the first aspect of the present invention, the building is a unit building, which is connected to a structure of a building unit above the rising portion and has a rising portion. Diagonal members are arranged over the lower part of the building unit and the floor beam of the building unit, and both ends of the diagonal member are joined to the lower part of the rising part and the floor beam of the building unit, respectively.

[0007] The present invention according to claim 3 provides the invention according to claim 1 or 2.
According to the present invention, the rising portion is further provided with a stiffener material for supporting a vertical load of the building.

According to a fourth aspect of the present invention, there is provided a step of installing a concrete pressure-resistant plate portion on the ground, a step of joining a metal rising portion on the pressure-resistant plate portion, and joining a building to an upper portion of the rising portion. And a process of arranging the diagonal material over the lower part of the rising part and the building, and joining both ends of the diagonal material to the lower part of the rising part and each of the building. .

According to a fifth aspect of the present invention, there is provided a step of installing a concrete pressure-resistant plate portion on the ground, a step of joining a metal rising portion on the pressure-resistant plate portion, and a structure of a building unit above the rising portion. Jointing with the body, arranging the diagonal material over the lower part of the rising part and the floor beam of the building unit, and joining both ends of the diagonal material to the lower part of the rising part and the floor beam of the building unit, respectively. This is the method of constructing the foundation.

It is preferable that the "joining" described in claims 1, 2, 4, and 5 be "pin joining", respectively, thereby providing the following advantages (a) and (b). (a) Separate the rising portion of the foundation from the pressure-resistant plate portion, and connect the rising portion to the pressure-resistant plate portion with a pin. Accordingly, the height h of the pressure-resistant plate portion can be reduced, and the bending moment M = P × h applied to the pressure-resistant plate portion by the external force P can be reduced. Therefore, the distributed load acting on the bottom surface of the pressure-resistant plate portion (load equal to or less than the ground strength) Therefore, when the bending moment is opposed, the bottom width of the pressure-resistant plate portion can be reduced, and the foundation can be reduced in size (FIG. 4B).

(B) When a plurality (N) of building units are installed in series in the longitudinal direction of the foundation (FIG. 5 (A)), the rising portions are pin-joined to anchor bolts implanted in the pressure-resistant plate portion of the foundation. Then, each of the plurality of building units is pin-joined to the rising portion. At this time, F is the horizontal force acting on the building, K is the height of the point of application of the horizontal force F to the pressure-resistant plate portion of the foundation, L is the length of the rising portion joined to the pressure-resistant plate portion of the foundation, Assuming that the pulling force acting on the anchor bolt joining the rising portion to the pressure-resistant plate portion is V, FK
= VL and V = FK / L. When the building unit is directly joined to the anchor bolts planted on the concrete foundation (FIG. 5B), the length of the building unit joined to the foundation by the anchor bolts is relatively small (L / N). ), The pull-out force acting on the anchor bolt increases. On the other hand, in the present invention, as shown in FIG. 5C, a plurality of building units are joined to the pressure-resistant plate portion via the rising portion, so that the joining portion between the building unit having a large pulling force and the rising portion is made of a metal material. On the other hand, the length of the rising portion joined to the pressure-resistant plate portion by the anchor bolt is large (L), and the pull-out force acting on the anchor bolt is small. , The workability is improved, and the embedding position accuracy can be improved.

[0012]

According to the first, second, fourth and fifth aspects of the invention, the following effects are obtained. When the rising part is joined to the pressure-resistant plate part to form the foundation, and when the building (column base of the building unit) is joined to the upper part of the rising part, diagonal material is used for the rising part and the building (the floor beam of the building unit). By crossing over and forming a truss,
The fall of the foundation can be prevented. At this time, the diagonal material is installed only on the side of the foundation and does not separate under the floor.

According to the third aspect of the invention, the following operation is provided. By providing the stiffener material at the rising portion of the foundation, the vertical load supporting performance of the building (building unit) can be improved.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing a foundation, FIG. 2 shows a foundation, (A) is a side view showing the whole foundation, (B)
Is a side view showing a fall prevention truss, FIG. 3 shows a construction procedure of a foundation, (A) is a perspective view showing an installation process of a pressure-resistant plate portion,
(B) is a perspective view showing an underfloor construction step, (C) is a perspective view showing a joining step of a rising portion, FIG. 4 shows a comparison of the bottom width of a pressure-resistant plate portion of a foundation, and (A) is a concrete integrated foundation. FIG. 5B is a side view showing the foundation of the present invention, and FIG.
Fig. 3 shows the anchor pull-out force of the foundation in comparison, (A) is a side view showing a unit building, (B) is a side view showing a concrete integrated foundation, and (C) is a side view showing the foundation of the present invention.

FIG. 1 shows a foundation 20 for a building unit 11 constituting a unit building 10 (building). The foundation 20 has the following configurations (A) to (E). (A) A concrete pressure-resistant plate portion (base) 21 is installed on the ground 1 so as to correspond to the installation span of the building unit 11 constituting the unit building. Pressure plate 21
Has a load receiving portion 21A integrally and an anchor bolt 22 implanted therein.

(B) The entire surface under the floor of the unit building 10 (however, the load receiving portion 21A of the pressure-resistant plate portion 21 and the anchor bolt 2
2), a moisture barrier film 23 is spread under the floor, and plaster mortar (moisture-conditioned soil concrete) 24 is cast thereon.

(C) With the metal rising portion 25 separated from the pressure-resistant plate portion 21 placed on a leveling mat 22A provided on the anchor bolt 22, the level is raised, and the pressure-resistant plate is locked by the lock nut 22B of the anchor bolt 22. Part 2
It is pin-joined to the first load receiving portion 21A. At this time, the stiffener member 26 supporting the vertical load of the building unit 11 is joined to the pressure-resistant plate portion 21 by the anchor bolt 22 together with the rising portion 25.

(D) The rising portion 25 (and the stiffener 2)
6) on the upper part of the column 12A of the pillar 12 of the building unit 11
(Alternatively, a portion of the floor beam 13 close to the leg portion 12A (FIG. 5
(B)) is pin-joined with the fastening bolt 27. Since the rising portion 25 falls down as it is, the following (E) is performed (FIG. 2B).

(E) The lower part of the rising part 25 (the lower part of the stiffener material 26) and the floor beam 13 of the building unit 11
The diagonal member 28 is arranged, and both ends of the diagonal member 28 are connected to the rising portions 2.
5 is joined to the lower part of the stiffener member 26 and the floor beam 13 by joining bolts 29 and 30 respectively. The diagonal member 28 is provided with a connecting rod 28C screwed to the joining members 28A and 28B at both ends with left and right reverse screws so that the perpendicularity of the floor beam 13 to the rising portion 25 can be adjusted.

In FIG. 1, reference numeral 31 denotes a basic heat insulating material;
2 is a decorative material, 33 is a heat insulating material, and 34 is an outer wall material.

Therefore, the foundation 20 is constructed as shown in the following (1) to (4). (1) The pressure plate 21 is installed on the ground 1. Pressure plate 21
May be made of a precast concrete plate, or may be cast with cast-in-place concrete (FIG. 3A).

(2) The pressure-resistant plate portion 21 is provided with a load receiving portion 21A. Further, the under-floor moisture-proof film 23 and the plaster mortar 24 are installed on the entire under-floor surface. The underfloor piping 35 is also installed (FIG. 3B).

(3) The rising portion 25 and the stiffener 26 are joined to the pressure-resistant plate portion 21 by pins (FIG. 3C).

(4) Rising section 25 and stiffener 26
And the leg 12A of the column 12 of the building unit 11 is pin-joined, and both ends of the diagonal member 28 are connected to the rising portions 25.
(Stiffener 26) and floor beam 1 of building unit 11
3 is pin-joined (FIG. 3C).

According to the present embodiment, the following operations are provided. When the rising portion 25 is pin-joined to the pressure-resistant plate portion 21 to form the foundation 20, and when the building (the column base 12A of the building unit 11) is pin-joined to the upper portion of the rising portion 25, the rising portion 25 and the building (building) are joined. Floor beam 1 of unit 11
3) The truss is assembled by wrapping the diagonal member 28 between them, and the overturn of the foundation 20 can be prevented. At this time, the diagonal member 28
Is installed just beside the foundation 20 and does not separate under the floor.

In the concrete foundation shown in FIG. 4A, a bending moment M = P × H (H is the total height of the foundation) applied to the foundation by the external force P, and the distributed load acting on the bottom surface of the foundation (a load less than the ground bearing capacity). ), When the bending moment is countered, the H becomes large and the M becomes large, so that the bottom width of the base becomes large and the foundation becomes large.

On the other hand, in the case of the foundation 20, FIG.
As shown in (B), the rising portion 25 of the foundation 20 is separated from the pressure-resistant plate portion 21, and the rising portion 25 is separated from the pressure-resistant plate portion 21.
Was pin-joined. Accordingly, the height h of the pressure-resistant plate portion 21 is set to be small, and the external force P applies a bending moment M =
Since P × h can be reduced, the width of the bottom surface of the pressure-resistant plate portion 21 can be reduced when the bending moment is countered by a distributed load (a load equal to or less than the ground strength) acting on the bottom surface of the pressure-resistant plate portion 21. The size can be reduced (FIG. 4
(B)).

When a plurality of (N) building units 11 are installed in series in the longitudinal direction of the foundation 20 (FIG. 5A), the rising portions 25 are attached to the anchor bolts 22 implanted in the pressure-resistant plate portion 21 of the foundation 20. Pin-up, this rising part 25
Each of the plurality of building units 11 is joined by pins. In this case, it may be connected to a floor beam as shown in FIG. 5B or to a pillar. At this time, F is the horizontal force acting on the building, K is the height of the point of action of the horizontal force F on the pressure-resistant plate portion 21 of the foundation 20, and K is the height of the rising portion 25 joined to the pressure-resistant plate portion 21 of the foundation 20. Assuming that the length is L and the pull-out force acting on the anchor bolt 22 joining the rising portion 25 to the pressure-resistant plate portion 21 is V, FK =
VL, and V = FK / L. When the building unit 11 is directly joined to an anchor bolt planted on a concrete foundation (FIG. 5B), the length of the building unit 11 joined to the foundation by the anchor bolt is relatively small (L / N), the pull-out force acting on the anchor bolt increases. In contrast, in the present invention, FIG.
As shown in (C), since the plurality of building units 11 are joined to the pressure-resistant plate portion 21 via the rising portions 25, the joining portion between the building unit 11 and the rising portion 25 having a large pulling force is a joining between metal materials. On the other hand, the length of the rising portion 25 joined to the pressure-resistant plate portion 21 by the anchor bolt 22 is large (L), and the pulling force acting on the anchor bolt 22 is small. And the workability is improved, and the accuracy of the embedding position can be improved.

By providing the stiffener 26 at the rising portion 25 of the foundation 20, a building (building unit 1) can be formed.
The vertical load supporting performance of 1) can be improved.

In the foundation 20, the rising portion 2
5. As a constituent material of the stiffener material 26 and the diagonal material 28, a rust-resistant metal such as carbon steel, chromium steel, aluminum or titanium that has been subjected to rust prevention treatment can be used.

Although the preferred embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to this preferred embodiment, and the design may be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, the foundation of the building of the present invention and the construction method thereof can be applied not only to a building consisting of unit buildings but also to general buildings.

[0032]

As described above, according to the present invention, the foundation of a building can be constructed simply and in a short time, and the fall of the foundation can be prevented without dividing under the floor.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a foundation.

FIGS. 2A and 2B show a foundation, FIG. 2A is a side view showing the entire foundation, and FIG. 2B is a side view showing an overturn prevention truss.

FIGS. 3A and 3B show a construction procedure of a foundation; FIG. 3A is a perspective view showing an installation process of a pressure-resistant plate portion; FIG. 3B is a perspective view showing an underfloor construction process; FIG.

FIG. 4 shows the bottom width of the pressure-resistant plate portion of the foundation in comparison, (A) is a side view showing the concrete integrated foundation,
(B) is a side view showing the foundation of the present invention.

5A and 5B show the anchor pull-out force of the foundation in comparison, (A) is a side view showing a unit building, (B) is a side view showing a concrete integrated foundation, and (C) shows a foundation of the present invention. It is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground 10 Unit building (building) 11 Building unit 12 Pillar 12A Leg 13 Floor beam 20 Foundation 21 Pressure-resistant version part 25 Rise part 26 Stiffener material 28 Diagonal material

Claims (5)

[Claims] 1. A foundation for a building comprising a concrete pressure plate portion installed on the ground and a metal rising portion separated from the pressure plate portion, the pressure plate portion and the rising portion are joined to each other, and the rising portion is formed. It is characterized by joining a building to the upper part of the building, arranging diagonal material over the lower part of the rising part and the building, and joining both ends of the diagonal material to the lower part of the rising part and the building, respectively. The foundation of building to do. 2. The building according to claim 1, wherein the building is a unit building including pillars and beams. The building is joined to a structure of a building unit at an upper portion of the rising portion, and is inclined across a lower portion of the rising portion and a floor beam of the building unit. 2. The foundation of a building according to claim 1, wherein a material is disposed, and both ends of the diagonal material are joined to a lower portion of the rising portion and a floor beam of the building unit, respectively. 3. The stiffener member for supporting a vertical load of the building at the rising portion.
Foundation of the described building. 4. A step of installing a concrete pressure plate on the ground, a step of joining a metal rising portion on the pressure plate portion, and joining a building to an upper portion of the rising portion and a lower portion of the rising portion. And arranging the diagonal material over the building, and joining the two ends of the diagonal material to the lower part of the rising part and each of the building. 5. A step of installing a concrete pressure-resistant plate portion on the ground, a step of joining a metal rising portion on the pressure-resistant plate portion, and joining a building unit structure to an upper portion of the rising portion, Laying the diagonal material over the lower part of the part and the floor beam of the building unit, and joining both ends of the diagonal material to the lower part of the rising part and the floor beam of the building unit, respectively. .