JP4166419B2 - Building foundation structure and building foundation construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a building foundation structure and a building foundation construction method.
[0002]
[Prior art]
In a traditional wooden structure, a foundation is built on the ground, a foundation is placed on the foundation, and a building is built on the foundation.
[0003]
[Problems to be solved by the invention]
However, in the conventional wooden structure, in order to make a foundation, it is necessary to make a formwork, pour concrete into it, and to cure it. Moreover, in the conventional wooden structure, since the foundation and the foundation are firmly fixed, there has been a problem that the ground shaking is directly transmitted to the foundation during the earthquake and is damaged.
[0004]
The present invention has been made paying attention to such a conventional problem, and an object of the present invention is to provide a building foundation structure and a building foundation construction method that can be easily constructed and can reduce damage caused by an earthquake.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a building foundation structure according to the present invention of claim 1 includes a plurality of piles having pins that are driven into the ground and project at the upper end, and grooves, with the grooves facing upward. A plurality of receiving materials attached to the respective piles with play with respect to each pile by the pins, and a base extending in the horizontal direction by being fitted in each groove with play with respect to each groove, It is characterized by having.
[0006]
In the building foundation structure according to the first aspect of the present invention, the foundation is supported by the groove of the receiving material on the pile. Therefore, compared with the case where the foundation is made by pouring concrete, a formwork or concrete is cured. The construction can be facilitated without the need for troublesome work. In addition, since the base is not fixed to the receiving material, the shaking of the ground is difficult to be directly transmitted to the base in the event of an earthquake, and damage caused by the earthquake can be reduced. Each pile may have a different length and thickness depending on the nature of the ground at the place where it is driven and the weight of each place where the building is supported.
[0008]
The building foundation structure according to the first aspect of the present invention is more robust because each receiving member is attached to each pile by a pin. Since each receiving material has play with respect to each pile and the base has play with respect to each groove, the vibration during the earthquake can be absorbed by the play, and damage caused by the earthquake can be suppressed to a minimum.
[0009]
In the building foundation structure according to the present invention of claim 2, in the building foundation structure of claim 1 , each pile has a cap at an upper end, the cap has a flange at a side portion, and the pin extends to the cap. Each receiving member has a protruding portion on a side portion, and the protruding portion is provided opposite to the flange and spaced from the flange so that a jack can be installed. To do.
[0010]
In the building foundation structure according to the second aspect of the present invention, since each receiving member has a protruding portion on the side portion, when ground subsidence occurs, the protruding portion is lifted with a jack, and the receiving member and the cap on the pile are The receiving material is supported with a height adjusting member interposed therebetween, and the influence of ground subsidence can be corrected. When the ground below the protrusion is soft, a jack is installed between the cap flange and the protrusion to prevent the jack from sinking into the ground, unlike when the jack is supported on the ground. And repair work can be facilitated. The cap and the receiving material may be integrally formed.
[0011]
In the building foundation construction method according to the present invention of claim 3, a plurality of piles having pins protruding at the upper end are driven into the ground, and a receiving material having grooves is directed to each pile by the pins with the grooves facing upward. with play mounted on each pile, characterized in that fitted to extend the base horizontally each groove with play to each groove. By the building foundation construction method according to the third aspect of the present invention, the building foundation structure according to the first aspect of the present invention can be constructed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of the present invention.
As shown in FIG. 1A, the building foundation structure has a plurality of piles 1, a plurality of receiving materials 2, and a base 3. In order to construct this building foundation structure, first, a plurality of piles 1 are driven into the ground. Each pile 1 is a concrete stake, and is driven into the ground in regular alignment at equal intervals in the vertical and horizontal directions like a grid. Each pile 1 can be appropriately used one having a different length and thickness depending on the nature of the ground at the place to be driven and the weight of each place where the building is supported.
[0013]
Each pile 1 has a cap 4 at its upper end. The cap 4 is made of steel and is attached to the upper end of each pile 1. A rubber cushion material may be interposed between the cap 4 and the pile 1. In this case, the vibration of the earthquake can be absorbed by the cushion material. The cap 4 may have a flange 4a on the side. Each pile 1 has a recess 1 a at the center of the upper end of the concrete on the lower side of the cap 4. The cap 4 has a through hole 4b communicating with the recess 1a at the top. A head portion 5a of the pin 5 is disposed in the recess 1a with play, and a shaft portion 5b of the pin 5 protrudes upward from the through hole 4b with play with respect to the through hole 4b. A male screw is threaded around the shaft portion 5 b of the pin 5.
[0014]
Next, the receiving material 2 is attached on each pile 1. Each receiving member 2 has a bottom 2a and a side wall 2b perpendicular to the bottom 2a, and a groove 6 on the upper side. A rubber cushion material may be provided inside the groove 6. In this case, it is possible to absorb the shaking of the earthquake by the cushion material and make it difficult to be transmitted to the base 3. A rubber cushion plate 7 is provided between the receiving material 2 and the pile 1. The cushion plate 7 absorbs the shaking of the earthquake and makes it difficult to transmit to the receiving material 2.
[0015]
As shown in FIG. 2, the receiving material 2 at the position where the base 3 intersects the cross has a cross-shaped groove 6a, the receiving material 2 at the four corners has an L-shaped groove 6b, and the base 3 has a three-way shape. The receiving material 2 at a position intersecting with the T has a T-shaped groove 6c, and the receiving material 2 supporting only one base 3 has a linear groove 6d.
[0016]
As shown in FIG. 1A, the cushion plate 7 and the bottom 2a of the receiving member 2 have attachment holes 7a and 7b, respectively, in the center. The shaft 5b of the pin 5 has play with respect to the mounting holes 7a and 7b and protrudes upward from the mounting holes 7a and 7b, and a nut 8 is screwed to the tip thereof. In this way, each receiving member 2 is attached with play to each pile 1 with the groove 6 facing upward. As shown in FIG. 1B, each receiving member 2 may have a recess 6 e that accommodates the nut 8 in the upper part of the groove 6. The recess 6e is formed so as to have play with the nut 8. Moreover, as shown to FIG. 1 (A), the receiving material 2 may have the protrusion part 2c in a side part. In this case, the projecting portion 2c is provided at a distance facing the flange 4a so that a jack can be installed between the projecting portion 2c and the flange 4a.
[0017]
As shown in FIG. 2, the base 3 is fitted into each groove 6 so as to extend in the horizontal direction. A recess 3 a is formed on the lower surface of the base 3, and the recess 3 a is combined with the nut 8 to fix the base 3. The base 3 is fitted with play in each groove 6. As the base 3, the same one as the base 3 of a general wooden building is used. On the base 3, a wooden building is constructed by a normal construction method.
[0018]
Since the foundation 3 of the building is supported by the grooves 6 of the receiving material 2 on the pile 1, it is less time-consuming to make a formwork or to cure the concrete than to pour concrete into the foundation. The construction can be facilitated. Further, since the base 3 is not fixed to the receiving material 2, it is difficult for the shaking of the ground to be directly transmitted to the base 3 in the event of an earthquake, and damage caused by the earthquake can be suppressed.
[0019]
Since each receiving material 2 is attached to each pile 1 by the pin 5, the building foundation structure is more robust than the case where the pin 5 is not used. Each receiving material 2 has a play with respect to each pile 1, and the base 3 has a play with respect to each groove 6, so that the vibration during the earthquake is absorbed by the play and the damage caused by the earthquake is kept small. Can do.
[0020]
When the building foundation has a protruding portion 2 c on the side of each receiving material 2, when the ground subsidence occurs, the protruding portion 2 c is lifted with a jack, and between the receiving material 2 and the cap 4 on the pile 1. The receiving member 2 is supported with the height adjusting member interposed therebetween, and the influence of ground subsidence can be corrected. When the cap 4 has the flange 4a, even when the ground below the projecting portion 2c is soft, the jack is supported on the ground by installing the jack between the flange 4a and the projecting portion 2c of the cap 4. In contrast, the jack can be prevented from sinking into the ground, and repair work can be facilitated.
[0021]
【The invention's effect】
According to the building foundation structure and the building foundation construction method according to the present invention, the construction is simple and the damage caused by the earthquake can be reduced.
[Brief description of the drawings]
FIG. 1A is a cross-sectional view showing a main part of a building foundation structure according to an embodiment of the present invention, and FIG. 1B is a cross-sectional perspective view showing another aspect of a cradle.
FIG. 2 is a plan view showing a building foundation structure according to the embodiment of the present invention.
[Explanation of symbols]
1 Pile 2 Receiving material 3 Base 4 Cap 5 Pin 6 Groove

Claims (3)

A plurality of piles having pins that are driven into the ground and project at the upper end ;
A plurality of receiving materials each having a groove and having a play with respect to each pile by the pin with the groove facing upward, respectively attached on each pile;
A base that has play with respect to each groove and is fitted in each groove and extends horizontally,
Building foundation structure characterized by having. Each pile has a cap at the upper end, the cap has a flange on the side, the pin is attached to the cap, each receiving member has a protrusion on the side, and the protrusion has the flange and 2. The building foundation structure according to claim 1 , wherein the building foundation structure is provided so as to face each other so that a jack can be installed between the flanges. On the ground, driving a plurality of piles having a pin projecting on the upper end, with play to each pile by the pin toward the receiving member having a groove said groove on the upper side mounted on each pile, each groove The building foundation construction method is characterized in that a base is fitted in each groove so as to extend in a horizontal direction with play .

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