JPS6315412B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention is a novel structure of a "wooden column base embedded foundation" developed in connection with Japanese Patent Application No. 126558/1983, which has already been filed by the applicant. It is related to.

In the already developed invention, the column base fixing members are fixed on the foundation installed at a predetermined depth below the ground surface, and each column base fixing member is connected and fixed with a connecting material, and then the column base By forming a concrete layer on the fixed member side, underground beams, and dirt floor, many downward bowl-shaped parts are realized on the lower surface of the poured concrete layer, while the column base fixing member is firmly attached to the poured concrete layer. As a result, a wooden column inserted and erected into the column base insertion space of the column base fixing member has almost the same structural strength as if it were rigidly connected to the same foundation, and the column cross section For example, by using wooden columns with a large cross section of about 210 mm square, it was possible to create a wooden structure that did not require any braces.

However, the design standards for wooden structures in Japan are such that as long as the framework structural members are made of wood, braces, flint foundations, flint beams, etc. must be used to conform to the predetermined structural type. Because the structure is such that a building permit is not granted, the wooden structure invented in Japanese Patent Application No. 58-126558 cannot be widely provided to the world as a building that has received a building permit (however, In order to obtain a building permit, it would be a different matter to formally adopt braces, flint beams, etc. that are completely unnecessary in terms of structural strength. We are actively collecting experimental data from institutions. The present invention is based on the technical idea of the previous invention on the premise that the current design standards can be cleared for the time being, but attempts to simplify it slightly and change the structural form to a pin structure. It is something.

The details of the configuration will be described below based on a typical embodiment of the invention shown in the drawings. That is, the basic structure of the present invention has a predetermined depth below the ground surface;
For example, a split stone layer 1 is formed in a grid-like arrangement at a distance of about 250 mm, and an underground beam 2 is formed for each unit grid G, G... of the grid formed by a portion of the split stone layer 1. The raised gravel bed layer 3, 3 serves as a formwork for
...to form bulky. And the above-mentioned warikuri stone layer 1
In the grid groove 4 formed by the adjacent raised gravel bed layers 3, 3, a dirt floor sheet 9, for example, a synthetic resin sheet, etc., is laid, or concrete is poured directly without laying it to form the raised gravel bed layer 3. Height lower than the top surface (usually approximately 300 mm from the top surface of Warikuri Stone Layer 1)
approximately from the top surface of the raised gravel bed layer 3.
The underground beam 2 is formed so that it is located approximately 80 to 100 mm below.

When forming the underground beam 2 by pouring concrete, a predetermined number of anchor bolts 7, 7... are planted at key points according to the column division, and column base fixing members 6, 6..., which will be described later, are installed. In addition to preparing for the fixation and placement of..., if necessary, reinforcing bars 21, 21..., which serve both as a positioning member for these anchor bolts 7, 7... and as a reinforcing member for the underground beam 2, should be arranged in advance. I'll do what I do. 22 in the figure is level distortion correct mortar.

Underground beam 2 formed lower than the raised gravel bed layer 3
The column base fixing member 6 is attached to the top surface using anchor bolts 7, 7, etc., which are installed in advance according to the column division.
is placed and fixed. As shown in the perspective view of FIG. 3, this column pedestal fixing member 6 has a structure in which a fixing portion 61 is formed at the lower end, and a column pedestal insertion space 63 and a brace joint portion 66 are formed at the upper end, as shown in the embodiment. As the fixing part 61, for example, the insertion hole 6 of the anchor bolt 7 is formed in a flat steel plate or other strong plate body.
2, 62... are adopted, and a cylindrical steel member having a hollow portion corresponding to the cross section of the column pedestal is erected and integrated on the upper surface thereof to realize the column pedestal insertion space 63. Near the upper end of the cylindrical steel material and other members constituting this column base insertion space 63, a column base connecting portion 64 for inserting and fixing the wooden column base C, for example, a bolt hole for inserting a fixing bolt, is provided. The wooden column pedestal C inserted into the column pedestal fixing member 6 is connected and fixed to the foundation via the fixing bolt 65.

On the other hand, the brace joint 66 formed at the upper end of the column base fixing member 6 is integrally attached to the outside near the upper end of the column base fixing member 6, as in the embodiment shown in FIG. In addition, the fixing bolt 65 shown as one embodiment of the above-mentioned column base connection part 64
The fourth method used to connect separate metal fittings.
It is also possible to adopt a structure as shown in the figure. In the figure, S indicates a bracelet.

Note that the column base insertion space 63 of the column base fixing member 6 is
In addition to the cylindrical steel material shown above, the one shown in Figure 4 is made by symmetrically combining two sets of bent plates with an L-shaped flat cross section and welding them together, and other L-shaped ones are not shown. It is possible to adopt a structure in which four flat steel plates bent in a shape are welded together, a hollow cylindrical shape, or any other structure as long as it can realize a hollow cross section.

After the column base fixing member 6 is fixed to the upper surface of the underground beam 2 in this way, the column base fixing member 6 is cast over the outer periphery excluding the upper end, the upper surface of the underground beam 2, and the upper surface of the raised gravel bed layer 3. After forming the concrete layer 5 and leveling its upper surface, apply a mortar finish (not shown) if necessary, then directly install tumble joists (not shown) and finish the flooring. Or, as in the illustrated embodiment, it can be used directly as a concrete floor surface. Therefore, it becomes possible to omit not only the foundation, but also most of the structural members such as the flint foundation, bundles, roots, and ropes that could not be omitted with conventional floor assembly structural members. In the figure, 53 indicates reinforcing reinforcing bars or lath materials.

In addition, since the joists are placed directly on the top surface of the poured concrete layer 5 in this way,
In order to prevent the influence of moisture from the poured concrete layer 5, measures such as providing a waterproof structure within the poured concrete layer 5 or ventilation holes 8 are formed as in the illustrated embodiment. .

This ventilation port 8 is formed, for example, as follows. That is, on the outside of the column base fixing members 6, 6, 6, etc. for the wooden columns C1, C2, C3, which are located at the outermost positions in the column division, one step from the top surface of the concrete layer 5 is placed. A low concrete pouring surface 51 is formed, a step portion 52 between the two is used to form an inclined groove or a cutout groove reaching from the step portion 52 to the upper surface of the poured concrete layer 5, and a grille 8 is formed.
1, a simple ventilation opening 8 as shown in FIG. 5 can be realized. However, in order to realize a more perfect ventilation opening 8, it is necessary to form a grid-like groove 82 on the upper surface of the poured concrete layer 5 so that the ventilation openings 8, 8... are in communication with each other. For example, ventilation is ensured in areas where there is a risk of being closed off due to the installation of tumbled joists, and the influence of moisture from the eight poured concrete layers can be almost completely eliminated. .

The column base embedded foundation of the present invention formed as described above has the following structural characteristics:
Although this column base fixing member has an anchoring part in the middle of the underground beam, and the concrete embedment depth is somewhat shallow, the base of the wooden column can be reliably embedded in the poured concrete layer by using a brace together. , since it is fixed, there is no risk of the foundation and superstructure being separated and destroyed due to external forces, especially earthquakes, as was the case in the past, and the foundation plate is omitted.
Although it is a simple structure in which underground beams are formed directly on top of the cracked stones, the overall foundation structure is a solid slab of solid wood, similar to what is known as a solid foundation.
Many downward bowl-shaped parts are formed on the lower surface, making it a foundation structure that is extremely resistant to crustal deformation during earthquakes, especially quicksand phenomena.In addition, the foundation structure is extremely resistant to crustal deformation during earthquakes, especially quicksand phenomena.In addition, there is a thick ground with a grid arrangement between each column base reinforced with braces. The middle beams run, completely preventing the occurrence of individual horizontal movement and uneven settlement of the wooden columns, and omitting all so-called floor assembly structural members such as foundations, daihiki, flint foundations, bundles, and root nets. Despite the fact that it can be
By adopting large cross-section members around 210mm square,
It is possible to omit members such as studs, which reduces the amount of wood used as a whole, and it is much more advantageous in terms of processing and assembly.The frame structure material is completely isolated from the ground, and it is free from termites etc. In addition to completely preventing damage caused by pests, there is no moisture propagation from the ground, and corrosion and deterioration can be effectively prevented.

In addition, during construction, subsequent work can be proceeded by simply digging the entire contour within the building's planar shape at once using a box hoe or other machine, eliminating the need for complex excavation work as in the past. As the construction efficiency is greatly improved,
By adopting a raised gravel bed layer, most of the formwork for foundation work can be omitted, which not only eliminates the cost of consumables such as formwork and separators, but also reduces the time and effort required to assemble and remove formwork. This reduces the cost of each work and shortens the construction period.Unlike the conventional work of pouring concrete into a narrow formwork, it is an extremely simple operation that reliably forms a layer of poured concrete. Although the amount of concrete placed may be slightly larger than that using conventional technology, the increase in the raw material cost of the concrete used is more than compensated for by the cost reductions mentioned above. After the concrete surface has been cured for a certain period of time, it can be used as a flat work surface, and can be used for processing frame structural materials and other materials.
The assembly work can be carried out efficiently and safely (it also allows the entry of crane trucks, etc.), and the erection of the column is possible by inserting the column base fixing member into the column base insertion space. Since it can stand on its own (completely safely with no risk of falling), erection work can be done quickly and safely. Therefore, by predetermining the column division into a predetermined grid, the frame structural members or their associated members can be divided into beams or rows, or in some cases, can be divided into three-dimensional grids. It is extremely easy to unite it into prefabricated architectural styles.

In terms of other functions, the raised gravel bed layer is raised thickly as a formwork for forming underground beams and forming many downward bowl-shaped parts under the poured concrete layer. In addition to increasing the strength of the floor within the grid, the synergy between the gravel and the air layer in its gaps improves the heat retention function of the grid, making it possible to use a floor heating and cooling system, etc., compared to conventional wooden buildings. It has a number of features that could not be achieved with the basic structure of cloth foundations or cloth foundations with independent foundations. This, along with the inventions that have already been filed, must be highly evaluated as a basic structure for increasing the structural strength of wooden buildings and reducing construction costs.

[Brief explanation of the drawing]

The drawings show one of the typical embodiments of this invention, and FIG. 1 is a basic plan view showing the entire structure, and FIG. 2 is a partially omitted cross-section from A to A in FIG. 1. An enlarged sectional view, FIG. 3 is a perspective view of the column base fixing member, FIG. 4 is a perspective view showing another embodiment of the column base fixing member, and FIG. 5 is a cross section taken from B to B in FIG. FIG. 6 is a basic plan view showing another embodiment of the ventilation port. 1... Split stone layer, 2... Underground beam, 3... Raised gravel bed layer, 4... Grid groove, 5... Cast concrete layer, 6... Column base fixing member, C... Wooden column base , G...Grid, S...Breath.

Claims (1)

[Scope of Claims] 1. A split stone layer laid in a grid-like arrangement at a predetermined depth below the ground surface, and a bulky, underground beam forming formwork within the unit grid surrounded by the laid part of the split stone layer. A cast concrete underground beam lower than the upper end surface of the raised gravel bed layer is formed in the grid-shaped groove formed by the raised gravel bed layer, and at a predetermined location on the underground beam, the lower end has an anchoring part. , the column pedestal fixing member whose upper end is formed at the wooden column pedestal insertion space and the brace joint is fixed and placed, and the outer side of the column pedestal fixing member except for the upper end, the top surface of the underground beam, and the top surface of the raised gravel bed layer. A wooden column-base embedded foundation consisting of a poured concrete layer with a predetermined thickness and a number of downward bowl-shaped parts. 2. The column base fixing member includes a flat steel plate for fixing to the underground beam, a cylindrical steel member that is erected and integrated on the flat steel plate for fixation, and has a column base connection part and a brace joint part at the upper end. A wooden pedestal embedded foundation according to claim 1, which is formed by: 3. A patent claim in which a concrete casting surface is formed on the outer side of the column base fixing member located at the outermost position, which is one step lower than the top surface of the poured concrete layer, and a ventilation opening is formed using the stepped portion between the two. A wooden column base embedded foundation according to items 1 and 2. 4. A ventilation groove is formed on the upper surface of the inner cast concrete layer of the outermost column base fixing member, and each ventilation opening is made continuous by the ventilation groove. Embedded wooden column foundation.