JP3742536B2 - Building foundations and construction methods - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a building foundation and its construction method.
[0002]
[Prior art]
Conventionally, as described in Japanese Patent Application Laid-Open No. 9-60005, in the foundation of a building composed of a concrete pressure plate portion installed on the ground and a metal rising portion separated from the pressure plate portion, they are adjacent to each other. There is one in which the rising parts of the foundation are connected by a joint material.
[0003]
[Problems to be solved by the invention]
However, in the conventional technology, although the joint material that connects the rising portions of adjacent foundations prevents the adjacent foundations from falling, the underfloor is separated between adjacent foundations, and piping work under the floor, etc. It becomes an obstacle.
[0004]
An object of the present invention is to make it possible to construct a foundation of a building easily and in a short period of time, and to prevent the foundation from toppling without dividing the floor.
[0005]
[Means for Solving the Problems]
The present invention according to claim 1, in concrete withstand plate portion installed in the ground, in basic building formed by pin joints of the rising portion of the metallic, pins joining the building to the top of the rising portion At the same time, diagonal materials are arranged over the lower portion of the rising portion and the building, and both ends of the diagonal material are pin- joined to the lower portion of the rising portion and the building, respectively.
[0006]
According to a second aspect of the present invention, in the first aspect of the present invention, the building is a unit building including a column and a beam, and the structure of the building unit is pin- joined on the upper portion of the rising portion. together, which was as the slant member is arranged over the floor beams of the lower and the building unit of the rising portion, consisting of both ends of the slant member with pins joined to the respective floor beam of the lower and the building unit of the rising portion is there.
[0007]
According to a third aspect of the present invention, in the present invention according to the first or second aspect, a stiffener material for supporting a vertical load of the building is provided at the rising portion.
[0008]
According to a fourth aspect of the invention, the step of installing a concrete steel pressure plate unit to the ground, the steps of the pin joining the metal rising portion on the pressure-resistant plate portion and the pin joining the building to the top of the rising portion In addition, it is a foundation construction method including a step of arranging diagonal materials over the lower part of the rising part and the building, and pin- joining both ends of the diagonal material to the lower part of the rising part and the building respectively. .
[0009]
The present invention described in claim 5 includes a step of installing a concrete pressure plate portion on the ground, a step of pin- joining a metal rising portion on the pressure plate portion, and a structure of a building unit above the rising portion. as well as pin joints, perforated and a step of the slant member is arranged over the floor beams of the lower and the building unit of the rising portion, and the pin joined to each floor beams of the lower and the building unit of the rising portion of the both end portions of the diagonal member This is the construction method of the foundation.
[0012]
[Action]
According to the first, second, fourth, and fifth aspects of the invention, the following effect (1) is obtained.
(1) When the rising part is joined to the pressure plate part to form the foundation, and the building (column base of the building unit) is joined to the upper part of the rising part, the rising part and the building (floor beam of the building unit) The foundation can be prevented from overturning by building a truss over the diagonal. At this time, the diagonal material is only installed on the side of the foundation and does not divide the floor.
[0013]
The invention according to claim 3 has the following effect (2).
(2) By providing the stiffener material at the rising portion of the foundation, the vertical load support performance of the building (building unit) can be improved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
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 the foundation, (A) is a perspective view showing an installation process of a pressure-resistant plate part, (B) is a perspective view showing an underfloor construction process, (C) is a perspective view showing a joining process of a rising part, and FIG. (A) is a side view showing a concrete integrated foundation, (B) is a side view showing the foundation of the present invention, FIG. 5 shows a comparison of anchor pull-out force of the foundation, (A) The side view which shows a unit building, (B) is a side view which shows a concrete integrated foundation, (C) is a side view which shows this invention foundation.
[0015]
FIG. 1 shows a foundation 20 for a building unit 11 constituting a unit building 10 (building), and the foundation 20 has the following configurations (A) to (E).
(A) It has a concrete pressure plate part (base) 21 installed on the ground 1 so as to correspond to the installation span of the building unit 11 constituting the unit building. The pressure plate part 21 is provided with a load receiving part 21 </ b> A integrally and is provided with an anchor bolt 22.
[0016]
(B) Over the entire surface under the floor of the unit building 10 (excluding the load receiving portion 21A of the pressure plate 21 and the anchor bolt 22), the underfloor moisture-proof film 23 is laid, and plaster mortar (concrete soil between humidity control) 24 is laid.
[0017]
(C) With the metal rising portion 25 placed on the leveling mat 22A provided on the anchor bolt 22 and leveled, the pin is joined to the load receiving portion 21A of the pressure plate 21 by the lock nut 22B of the anchor bolt 22 To do. At this time, the stiffener material 26 that supports the vertical load of the building unit 11 is joined to the pressure plate part 21 by the anchor bolt 22 together with the rising part 25.
[0018]
(D) At the upper part of the rising part 25 (and the stiffener material 26), the leg part 12A of the column 12 of the building unit 11 (or the part close to the leg part 12A of the floor beam 13 (FIG. 5B)) is the fastening bolt 27. In this state, since the rising portion 25 falls down, the following (E) is performed (FIG. 2B).
[0019]
(E) The diagonal member 28 is arranged across the lower portion of the rising portion 25 (lower portion of the stiffener material 26) and the floor beam 13 of the building unit 11, and both ends of the diagonal member 28 are connected to the rising portion 25 (stiffener material 26). Pins are joined to the lower part and the floor beam 13 with joining bolts 29 and 30 respectively. The diagonal member 28 includes a connecting rod 28C that is screwed to both end joining members 28A and 28B with left and right reverse screws, and allows the perpendicularity of the floor beam 13 to the rising portion 25 to be adjusted.
[0020]
In FIG. 1, 31 is a basic heat insulating material, 32 is a decorative material, 33 is a heat insulating material, and 34 is an outer wall surface material.
[0021]
Therefore, the foundation 20 is constructed as follows (1) to (4).
(1) The pressure plate part 21 is installed on the ground 1. The pressure-resistant plate part 21 may be made of a precast concrete plate or may be casted by on-site concrete (FIG. 3A).
[0022]
(2) The pressure receiving plate portion 21 is provided with a load receiving portion 21A. Further, an underfloor moisture-proof film 23 and a plaster mortar 24 are installed on the entire surface under the floor. Underfloor piping 35 is also installed (FIG. 3 (B)).
[0023]
(3) The rising portion 25 and the stiffener material 26 are pin-bonded to the pressure-resistant plate portion 21 (FIG. 3C).
[0024]
(4) Pin-join the rising part 25 and the upper part of the stiffener material 26 and the leg part 12A of the pillar 12 of the building unit 11, and further connect the both ends of the diagonal member 28 to the lower part of the rising part 25 (stiffener material 26) and the building unit. Each of the eleven floor beams 13 is pin-joined (FIG. 3C).
[0025]
According to this embodiment, there are the following operations.
(1) When the rising portion 25 is pin-bonded to the pressure-resistant plate portion 21 to form the foundation 20, and the building (the column base 12A of the building unit 11) is pin-connected to the upper portion of the rising portion 25, the rising portion 25 and the building are built. The foundation 20 can be prevented from falling by spanning the object (floor beam 13 of the building unit 11) with the diagonal member 28 and assembling the truss. At this time, the diagonal member 28 is merely installed on the side of the foundation 20 and does not divide the floor.
[0026]
(2) In the concrete foundation shown in FIG. 4 (A), the bending moment M = P × H (H is the total height of the foundation) applied by the external force P to the foundation, and the distributed load acting on the bottom of the foundation (the load below the earth bearing capacity) ) To counter this bending moment, it becomes H large and M large, so that the bottom width of the foundation becomes large and the foundation becomes large.
[0027]
On the other hand, in the foundation 20, as shown in FIG. 4B, the rising portion 25 of the foundation 20 is separated from the pressure plate portion 21, and the rising portion 25 is pin-bonded to the pressure plate portion 21. Accordingly, since the height h of the pressure plate portion 21 can be reduced and the bending moment M = P × h applied by the external force P to the pressure plate portion 21 can be reduced, the distributed load acting on the bottom surface of the pressure plate portion 21 (below the ground strength) ) To counter this bending moment, the width of the bottom surface of the pressure-resistant plate portion 21 can be reduced, and the foundation 20 can be reduced in size (FIG. 4B).
[0028]
(3) When a plurality (N) of building units 11 are installed in series in the longitudinal direction of the foundation 20 (FIG. 5A), the rising portion 25 is attached to the anchor bolt 22 planted on the pressure-resistant plate portion 21 of the foundation 20. Each of the plurality of building units 11 is pin-bonded to the rising portion 25 by pin-bonding. In this case, it may be joined to the floor beam as shown in FIG. 5B or may be joined to the column. At this time, the horizontal force acting on the building is F, the height formed by the point of action of the horizontal force F with respect to the pressure plate part 21 of the foundation 20 is K, and the rising part 25 joined to the pressure plate part 21 of the foundation 20 is Assuming that the length is L and the pulling 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 pulling force acting on the anchor bolt increases. On the other hand, in the present invention, as shown in FIG. 5C, since the plurality of building units 11 are joined to the pressure plate part 21 via the rising part 25, the building unit 11 and the rising part 25 having a large pulling force are connected. While the joining portion is made of joining metal materials, the length of the rising portion 25 joined to the pressure plate 21 by the anchor bolt 22 is large (L), and the pulling force acting on the anchor bolt 22 is small. Thus, the embedding position of the anchor bolt 22 can be reduced to improve the workability, and the embedding position accuracy can be improved.
[0029]
(4) By providing the stiffener material 26 at the rising portion 25 of the foundation 20, the vertical load supporting performance of the building (building unit 11) can be improved.
[0030]
In the foundation 20, as the constituent material of the rising portion 25, the stiffener material 26, and the diagonal material 28, a rust-resistant metal such as carbon steel, chrome steel, aluminum, or titanium subjected to rust prevention treatment can be used.
[0031]
Although the 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 embodiment, and there are design changes and the like without departing from the gist of the present invention. However, it is included in the present invention. For example, the building foundation and its construction method of the present invention are not limited to those in which the building is a unit building, and can be widely applied to general buildings.
[0032]
【The invention's effect】
As described above, according to the present invention, the foundation of a building can be constructed easily and in a short time, and the foundation can be prevented from falling without dividing the floor.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a foundation.
FIG. 2 shows a foundation, (A) is a side view showing the whole foundation, and (B) is a side view showing a fall prevention truss.
FIG. 3 shows a basic construction procedure, (A) is a perspective view showing an installation process of a pressure plate part, (B) is a perspective view showing an underfloor construction process, and (C) is a joining process of a rising part. FIG.
FIG. 4 shows a comparison of the width of the bottom surface of the pressure-resistant plate portion of the foundation, (A) is a side view showing a concrete integrated foundation, and (B) is a side view showing the foundation of the present invention.
FIGS. 5A and 5B show comparison of anchor pull-out force of a foundation, FIG. 5A is a side view showing a unit building, FIG. 5B is a side view showing a concrete-integrated foundation, and FIG. 5C shows the foundation of the present invention. It is a side view.
[Explanation of symbols]
1 Ground 10 Unit building (building)
DESCRIPTION OF SYMBOLS 11 Building unit 12 Column 12A Leg part 13 Floor beam 20 Foundation 21 Pressure plate part 25 Standing part 26 Stiffener material 28 Diagonal material

Claims (5)

In the foundation of a building that is made by pin- joining a metal rising part to a concrete pressure plate part installed on the ground,
The building is pinned to the upper part of the rising part, and diagonal materials are arranged across the lower part of the rising part and the building, and both ends of the diagonal material are pinned to the lower part of the rising part and the building. The foundation of a building characterized by that. The building is a unit building composed of columns and beams,
The building unit structure is pin- bonded to the upper part of the rising part, and diagonal members are arranged across the lower part of the rising part and the floor beam of the building unit, and both ends of the diagonal member are connected to the lower part of the rising part and the building unit. The building foundation according to claim 1, which is pin- bonded to each floor beam.   The foundation of a building according to claim 1 or 2, comprising a stiffener material that supports a vertical load of the building at the rising portion. Installing a concrete pressure plate on the ground;
A step of pin- joining a metal rising part on the pressure plate part;
Pinning the building to the upper part of the rising part, arranging diagonal materials over the lower part of the rising part and the building, and pin- joining both ends of the diagonal material to the lower part of the rising part and the building, A foundation construction method comprising Installing a concrete pressure plate on the ground;
A step of pin- joining a metal rising part on the pressure plate part;
The building unit structure is pin- joined to the upper part of the rising part, and diagonal materials are arranged across the lower part of the rising part and the floor beam of the building unit, and both ends of the diagonal member are connected to the lower part of the rising part and the floor of the building unit. A foundation construction method comprising a step of pin- joining each of the beams.

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