JP2019039187A - Construction method of building foundation and form used for the same - Google Patents

Abstract

To improve underfloor environment by eliminating air sump in a building foundation.SOLUTION: A construction method of a building foundation which comprises an outer peripheral wall 10 positioned at an outer peripheral portion of the building foundation and a partition wall 20 partitioning an internal space of the outer peripheral wall 10, providing a ventilation hole in the outer peripheral wall 10 and providing a vent hole in the partition wall 20. The ventilation hole in the outer peripheral wall 10 of the foundation is provided at positions except corner portions and intersections with the partition wall 20. On the other hand, the vent hole in the partition wall 20 is provided at positions except intersections with the partition walls 20 and intersections with the outer peripheral wall 10 and in the vicinities of the intersections of the partition walls 20 and/or vicinities of intersections with the outer peripheral wall 10. The ventilation hole and the vent hole have a substantially circular cross-sectional shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for constructing a concrete foundation portion (a fabric foundation and a solid foundation) of a building, a mold used for the construction, and a support metal fitting for the mold, and in particular for the purpose of improving the underfloor environment, and improving ventilation and ventilation. It relates to the improvement of the basic part.

Due to recent demands for high durability and high earthquake resistance specifications required for excellent homes, the width of the fabric foundation rises and the transition (change) of the base foundation from discarded concrete to a solid foundation structure has become remarkable.
Therefore, in proportion to the "substantial increase in the covering volume of the foundation concrete", the occurrence of "evaporated water" with respect to the "bound water" in the "hydration progress" necessary for the concrete hardening that inevitably occurs, ie, " “Dissipation characteristics” have increased remarkably.
Therefore, since the “moisture dissipation phenomenon” occurs immediately after delivery of a new building, recognition and response to the occurrence of moisture damage is required, and if this response is mistaken, there is a high risk of having a large lesion in a subsequent building. There is a problem of becoming.

  There is also a method called `` forced ventilation '' using a fan or the like as a method for dealing with this, but because the problem such as noise and maintenance is envied, in the present invention, this method called forced ventilation is not adopted, It is intended to solve this problem by natural ventilation or partial improvement or addition to the foundation.

On the other hand, from the viewpoint of natural ventilation or natural ventilation, a construction method for building foundations called a foundation packing method has become the mainstream of modern times.
The initial method of this foundation packing method was a method in which a resin packing material was sandwiched between the foundation and the base at predetermined intervals in order to ensure underfloor ventilation.

The above-mentioned resin packing material is installed at a predetermined interval between the foundation and the base, but recently has a disadvantage that the base becomes uneven in a portion where no packing is provided. The basic packing long system that is laid on the entire surface is used.
That is, in this basic packing long, a method of performing ventilation through a plurality of through holes provided in the inside is adopted. As a result, an overall gap is formed between the foundation and the base, and ventilation and air permeability are ensured.
In this way, it is possible to eliminate the adverse effects caused by the phenomenon of moisture escaping from the foundation for 1 to 2 years after completion of the building.

And as for the current state of ventilation performance, the effective ventilation area is defined as 75 square cm or more per m by the Building Standard Law.
In the above-mentioned foundation packing method, the effective ventilation area is 101.76 square cm per m in the construction of the full-laying type foundation packing long.

On the other hand, in the case of fire draining, although there is no regulation by the Building Standard Law, in order to prevent the intrusion of flames due to fire from neighbors, etc., it is necessary to appropriately limit the opening area within a predetermined range. The current situation is that vendors are voluntarily restricting themselves.
Accordingly, in the basic packing method, the opening area of the fireproof drainer is limited, and the effective ventilation area cannot be increased any more.

  That is, even in this basic packing method, the ventilation performance and ventilation performance are not necessarily sufficient, and since various restrictions exist, further ventilation and ventilation efficiency cannot be improved. It is considered that the current situation is that it is necessary to review the construction method of natural ventilation in which a ventilation opening or a ventilation hole including an opening or a hole is provided in a conventional foundation.

Therefore, there is a need for additional measures in addition to the above basic packing method.
There are a variety of residential location environments. Currently, houses in areas that are susceptible to moisture damage, neighboring houses that are close to each other, or houses that are blocked from ventilation by obstacles. In order to be adversely affected by the above-mentioned underfloor ventilation environment under conditions that have many problems such as a house lacking curing treatment, a house with a complicated internal structure and a structure where air accumulation tends to occur, even after delivery of a new building In a dwelling house, the floor is exposed to phenomena such as moisture damage, condensation, decay, and puddles.

How can we solve this problem?
As described above, for example, a forced ventilation method using a fan or the like is also conceivable. However, in the present invention, the method of natural ventilation is searched without adopting this method.

  In the invention relating to “the basic structure of the building” described in Patent Document 1 below, the conventional vents and vents are utilized from the above viewpoint, and the arrangement, that is, the position of the vents, is devised to complete the invention. Is.

The problem is to prevent uneven ventilation under the floor of the building and to provide sufficient ventilation to the corners.
And the solution means is the partition wall which partitions the surrounding wall formed in the opposing wall surface and the inner space part of the surrounding wall in the foundation part of the building composed of the surrounding wall and the partition wall partitioning the inner space part of the surrounding wall. The first ventilation hole is formed in the opposite wall surface at the intersection.
A second ventilation hole is formed in the corner portion of the surrounding wall.
And the 3rd ventilation hole which connects each partitioned space part is formed in the cross | intersection part of the partition wall which faces the 1st ventilation hole formed in the opposing wall surface.

That is, in this prior art, a corner portion (second vent hole) of the surrounding wall, an intersection portion (first vent hole) between the surrounding wall and the partition wall, and an intersection portion between the partition wall and the partition wall ( A third ventilation hole) is provided.
According to the above solution, a ventilation port (first and second ventilation holes) or a ventilation hole (third ventilation hole) is disposed at the inner corner (corner corner) of the base, which is a portion where air accumulation is likely to occur. As a result, the retention of air is prevented.

Japanese Patent No. 4743399

However, in the basic structure of the building described in Patent Document 1, significant defects are lurking.
That is, it is a problem of the strength of the foundation.

  The first to third vent holes are provided at corners and intersections of the base portion, and are excellent in introducing outside air into the partitioned internal spaces, but have a wide opening. In addition, the position where the air holes are provided is a portion to which a very large building load is applied.

Therefore, it can be understood that the present invention is merely an idea with a very low practicality.
Therefore, in the present invention, the invention described in the above-mentioned patent document is further improved, and an object of the present invention is to provide a foundation construction method that can actually be constructed and can withstand the load of a building, and ventilation performance. In addition, an object of the present invention is to provide a construction method having extremely high ventilation performance.

  For this purpose, we mainly reviewed the surroundings of the internal foundation, provided ventilation holes that can be easily installed at all locations of the air reservoir and that can also be reinforced, and that the individual houses on the outer circumference foundation are free from the flow of outside air during the dry season. It aims at solving the problem by confirming beforehand and installing 4 to 6 ventilation openings at 2 to 3 locations in the relative direction of inflow and outflow.

  More specifically, in order to eliminate air accumulation in the internal foundation (part of the partition wall), a circular vent (through hole having a substantially circular cross section) is disposed at a specific position of the internal foundation, Peripheral foundations at positions corresponding to the ventilation environment (adjacent buildings, obstacles and dew road environment, etc.) and seasonal environment, especially the dry season (October to February) for buildings. The problem is to propose a structure that accelerates the flow of underfloor air by installing a round ventilation port on the outer wall.

  In order to solve the above-mentioned problem, the first one of the present invention is composed of an outer peripheral wall located in the outer peripheral portion of a building foundation and a partition wall that partitions the inner space of the outer peripheral wall, and the outer peripheral wall includes In the construction method of a building foundation in which a ventilation port is provided and the partition wall is provided with a vent hole, the ventilation port provided in the outer peripheral wall of the foundation has a ventilation port in a portion other than the corner portion and the intersection with the partition wall. On the other hand, the vent hole provided in the partition wall is a portion other than the intersection between the partition walls and the outer wall, and in the vicinity of the intersection between the partition walls and / or the outer wall. It is provided in the vicinity of an intersecting portion, and the ventilation opening and the ventilation hole have a substantially circular cross-sectional shape.

  According to a second aspect of the present invention, in the first aspect of the present invention, in the opening portion where the ventilation port and / or the ventilation hole is disposed, the rebar is disposed in the vertical direction of the reinforcing bars disposed in the foundation concrete. In this construction method, the stirrup is arranged, and the stirrup can be visually observed in the vertical direction of the substantially central portion of the opening portion.

  According to a third aspect of the present invention, in the first aspect of the present invention, in the opening portion in which the ventilation port and / or the ventilation hole is disposed, the rebar is disposed in the vertical direction in the reinforcing bars disposed in the foundation concrete. The construction foundation construction method is characterized in that a stirrup bar and a horizontal reinforcing reinforcing bar are arranged, and the reinforcing bar can be visually observed in a frontal cross shape at the opening portion.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, a reinforcing reinforcing bar is further added to the reinforcing bar disposed in the foundation concrete at the opening portion where the ventilation hole and / or the vent hole is disposed. The building foundation construction method is characterized in that the X-shaped reinforcing steel bars can be seen in front view at the opening portion.

  According to a fifth aspect of the present invention, in the above second to fourth aspects, the galvanizing treatment is applied to the reinforcing bars disposed in the ventilation port and / or the ventilation hole. It is a construction method for building foundations.

  According to a sixth aspect of the present invention, in the first aspect, the vent hole provided in the partition wall is formed of a mold that forms the vent hole and a support metal that supports the mold. A construction method for a building foundation, in which hardware is embedded in a partition wall and serves to reinforce the partition wall.

  A seventh aspect of the present invention is the construction method of a building foundation according to the sixth aspect, wherein the upper end of the support hardware is fixed to a reinforcing sub-bar stretched over an adjacent stirrup. is there.

  According to an eighth aspect of the present invention, a mold for forming a ventilation port or a vent used in the construction method for building foundations according to the second aspect of the present invention comprises a cylindrical void tube, and the void tube Is a vent hole or vent hole mold characterized in that streaks are arranged in the vertical diameter direction.

  According to a ninth aspect of the present invention, a mold for forming a vent or a vent used in the construction method for a building foundation according to any one of the second to fifth is a cylindrical mold, The mold is divided into two front and rear parts at the middle part in the longitudinal direction, and the divided front mold member and rear mold member can be assembled to each other so that they can be connected to and detached from each other. A cutout portion in which diametrical bars are arranged in the diameter direction is provided, or a cutout portion in which rebars are arranged in a cross shape or in an X shape in two diametrical directions so as to intersect is provided. It is a type for a vent or a vent.

A tenth aspect of the present invention is the vent or vent mold according to the ninth aspect of the present invention,
The inside diameter of the front mold member is expanded from the connecting edge toward the opening front edge, and the inside diameter of the rear mold member is expanded from the connecting edge toward the opening rear edge. It is a mold for a mouth or a vent.

An eleventh aspect of the present invention is the ventilator mold according to claim 9,
The vent hole mold is characterized in that the lower part of the front opening of the front mold member is formed in an outwardly expanded state.

  According to a twelfth aspect of the present invention, the support hardware used in the construction method for building foundations according to the sixth aspect of the present invention comprises a pair of symmetrical support frames, and the substantially cylindrical portion at the substantially central portion thereof. A support metal fitting that can hold a shape mold, is fixed to the upper side and the lower side of the pair of support frames, and is fixed to a horizontal auxiliary bar disposed on the foundation concrete. It is.

  According to a thirteenth aspect of the present invention, in the vent opening mold according to the eighth aspect, the lower portion of the opening located on the outside of the building of the mold is expanded to form an expanded state outward. This is a vent hole mold characterized by further adding a part forming mold.

14th thing of this invention is the construction method of the building foundation as described in said 1st thru | or 7th invention,
It is a construction method of a building foundation characterized in that reinforcing bars are further arranged in the peripheral part of a part where a ventilation hole or a ventilation hole is formed.

  According to a fifteenth aspect of the present invention, in the building construction method according to any one of the first to seventh or fourteenth aspects, the outer opening of the ventilation opening or the intermediate portion where the reinforcing bars are disposed. Construction method of a building foundation characterized by providing a breathable lid to prevent the invasion of pests, moths and pests

In the first aspect of the present invention, a round through-hole having a substantially circular cross-sectional shape of the ventilation port and the ventilation hole is used, and the one having the strongest form in load resistance performance is adopted.
Moreover, the ventilation port provided in the outer peripheral wall which becomes an outer periphery foundation is provided in parts other than the intersection part with the corner part and a partition wall, On the other hand, the vent hole provided in the partition wall used as an inner foundation is an intersection part of partition walls. In addition, the air holes are arranged in the air reservoir by being provided in a portion other than the intersection with the outer peripheral wall and in the vicinity of the intersection between the partition walls and / or in the vicinity of the intersection with the outer peripheral wall. Considered so.

Thereby, the building foundation which has favorable ventilation performance and ventilation performance, and also has the load bearing capability can be provided.
In addition, the ventilation port can be arranged at the most suitable position in consideration of the wind direction and the like according to the installation environment of the building. An underfloor environment where good ventilation and ventilation are performed can be realized.

  According to a second aspect of the present invention, in the first aspect of the present invention, in the opening portion where the ventilation port and the vent hole are disposed, the rebar is disposed in the vertical direction in the reinforcing bars disposed in the foundation concrete. The stirrup is arranged, and the stirrup is visible in the vertical direction of the substantially central part of the opening portion, and the reinforcing bar crosses the vertical direction of the central part of the vent and the vent. Adopted, thereby further improving the strength of the vent and vent portions.

  In the third aspect of the present invention, as in the second aspect of the present invention, the strength of the ventilation port and the ventilation hole is improved. It is arranged in a shape so that it can be visually observed.

  In the fourth aspect of the present invention, as in the second and third aspects of the invention, the strength of the vent and the vent is improved. Reinforcing bars are provided at the openings of the vent and the vent. It is arranged in an X shape when viewed from the front so that it can be viewed.

  In the fifth aspect of the present invention, it is specified that the reinforcing bars disposed in the ventilation port and / or the ventilation hole are subjected to a hot dip galvanizing process. In order to be exposed to rain and wind, etc., anti-rust and anti-corrosion measures are taken.

  According to a sixth aspect of the present invention, in the first aspect, the vent hole provided in the partition wall is composed of a mold that forms the vent hole and a support metal that supports the mold. The support hardware has an effect of fulfilling the role of reinforcing the partition wall.

  According to a seventh aspect of the present invention, in the sixth aspect of the invention, the upper end of the support metal is fixed to a reinforcing sub-bar extending over an adjacent stirrup, and the support metal is more limited. It is a thing.

  The eighth one of the present invention relates to a mold for forming a vent or a vent used in the second invention, and specifies that the mold uses a cylindrical void tube. . As a result, the void tube can be used as a mold in a state where the streaks are arranged in the vertical diameter direction. The effect is the same as that of the second invention.

  According to a ninth aspect of the present invention, the mold used in the construction methods according to the second to fifth aspects of the present invention is specified, and the mold is divided into two front and rear at an intermediate portion in the longitudinal direction. The divided front mold member and rear mold member can be assembled to each other so that they can be connected to and detached from each other. Alternatively, a notch portion in which the reinforcing bars are arranged in a cross shape or an X shape in two diametrical directions is provided so as to intersect. The effect is the same as in the second to fifth inventions.

  According to a tenth aspect of the present invention, in the mold according to the ninth aspect, the inner diameter of the front mold member is expanded from the connecting edge portion toward the opening front edge portion, and the inner diameter of the rear mold member is the connecting edge portion. It is characterized by being expanded toward the rear edge of the opening, and adopts a structure that can eliminate the intrusion of rainwater or the like into the floor.

  According to an eleventh aspect of the present invention, in the mold according to the ninth aspect, the lower portion of the front opening of the front mold member is formed in an outwardly expanded state, and the tenth aspect of the present invention. The same effect is exhibited.

  In the twelfth aspect of the present invention, the support hardware used in the construction method according to the sixth invention is further limited, that is, the support hardware is formed from a pair of symmetrical support frames. It is possible to hold the substantially cylindrical mold at its substantially central part, fix both at the upper end and lower end of the pair of support frames, and to the horizontal auxiliary bars arranged on the foundation concrete It is specified to be fixed. The effect is the same as that of the sixth invention.

  In the thirteenth aspect of the present invention, in the vent or vent mold according to the eighth aspect of the present invention, the lower part of the opening located on the outside of the building of the mold is formed in an outwardly expanded state. In order to achieve this, an expansion portion forming mold is further added, and the same effect as in the tenth aspect of the present invention is added.

  According to a fourteenth aspect of the present invention, in the construction method according to the first to seventh aspects of the present invention, a reinforcing reinforcing bar is further disposed in the periphery of a portion where a vent or a vent is formed. The reinforcement of the ventilation port or the vent hole is improved.

  According to a fifteenth aspect of the present invention, in the construction method according to any one of the first to seventh or fourteenth aspects, a pest, a moth and a pest are provided at an outer opening of a ventilation port or an intermediate portion where a reinforcing bar is disposed. It is provided with a cover that can be ventilated to prevent the intrusion of the insects and prevent insects and harmful animals from entering the floor.

It is an example of the foundation of a detached house, The (A) has shown the vent and the vent based on the conventional construction method, The (B) is explanatory drawing explaining the construction method which concerns on this invention . 1A and 1B show a first embodiment of a vent hole mold according to the present invention used when constructing a vent hole provided in a partition wall, in which (A) is a front view, (B) is a side view, (C) is a perspective view of a fixture for fixing the mold to the reinforcing bar. It is the front view which removed a part of type | mold after the concrete percussion concerning the said 1st Embodiment. 2nd Embodiment of the type | mold for vent holes which concerns on this invention provided in the outer peripheral wall or partition wall of a building foundation is shown, The (A) is a partially notched side view, The (B) is a partially notched front view. is there. It is a front view which shows the state which integrated the vent | die hole type | mold which concerns on the said 2nd Embodiment in the reinforcing bar of the base part. The foundation part completed with the type | mold for vent holes which concerns on the said 2nd Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. It is a disassembled side view which shows 3rd Embodiment of the type | mold for vent holes which concerns on this invention. The type | mold which concerns on the said 3rd Embodiment is shown, The (A) is the front view at the time of a reinforcement assembly | attachment construction, The (B) is a side view of a type | mold. It is a front view of the foundation part of the state completed using the type | mold of the said 3rd Embodiment. The basic part completed with the type | mold of the said 3rd Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. The type for ventilators which concerns on 4th Embodiment which concerns on this invention is shown, The (A) is a principal part front view, The (B) is a principal part side view. The type | mold which concerns on the said 4th Embodiment is shown, The (A) is construction front explanatory drawing, The (B) is a side view. The ventilation opening completed with the type | mold which concerns on the said 4th Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. The 5th Embodiment of the type for ventilators which concerns on this invention is illustrated, The (A) is a principal part front view, The (B) is a principal part side view. The construction state of the said 5th Embodiment is shown, The (A) is a front view, The (B) is a side view. The outer peripheral wall completed using the type | mold for ventilation openings of the said 5th Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. FIG. 11 shows a vent opening mold according to a sixth embodiment of the present invention, in which a substantially horizontal reinforcing bar is disposed and added in addition to the mold according to the fourth embodiment shown in FIGS. The (A) is a principal part front view, The (B) is a principal part side view. The type | mold which concerns on the said 6th Embodiment is shown, The (A) is construction front explanatory drawing, The (B) is a side view. The ventilation opening completed with the type | mold which concerns on the said 6th Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. The vent die according to the seventh embodiment of the present invention is shown, and a substantially horizontal reinforcing bar is provided in addition to the die according to the fifth embodiment shown in FIGS. The (A) is a principal part front view, The (B) is a principal part side view. The type | mold which concerns on the said 7th Embodiment is shown, The (A) is construction front explanatory drawing, The (B) is a side view. The ventilation opening completed with the type | mold which concerns on the said 7th Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. It is the construction state front view which shows the other embodiment which concerns on this invention, and shows the state constructed | assembled using the type | mold for ventilators which arrange | positioned the vertical and horizontal rebar in the center of the void pipe in the shape of a cross. Reinforcing bars are added. The other embodiment which concerns on this invention is shown, and the construction state using the type | mold for vent openings of the said 7th Embodiment was illustrated, In addition to this, the two reinforcement bars as a reinforcement reinforcement were arrange | positioned. The state is illustrated. It is a front view which shows the ventilation port part of other embodiment which concerns on this invention, Comprising: The thing which has arrange | positioned the reinforcing bar in X shape is shown.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows an example of a foundation of a detached house, in which (A) shows a vent and a vent based on a conventional construction method, and (B) explains a construction method according to the present invention. It is explanatory drawing.

As shown in FIG. 1 (A), in the conventional construction method, an outer peripheral wall 10 that constitutes an outer peripheral foundation that surrounds the four sides of a building, and a partition wall 20 as an inner foundation that partitions the inside of the outer peripheral wall 10; In the building foundation composed of the above, the outer peripheral wall 10 is provided with an appropriate number of ventilation ports 11, and the partition wall 20 is provided with a plurality of vent holes 21 for underfloor ventilation.
In the figure, there is a part where the ventilation hole is located, which serves as a passage for underfloor maintenance. However, in the present invention, the ventilation hole and the ventilation hole are the themes. The maintenance passage is out of sight.

The vent hole 11 and the vent hole 21 are formed from through holes having a substantially rectangular shape when viewed from the front.
In this conventional foundation part structure J, outside air is introduced from the ventilation port 10, flows through the ventilation hole 21 provided in the partition wall 20, flows out from the ventilation port 10 on the opposite side, and is ventilated. is there. The arrows in the figure indicate the air flow.

However, in the conventional base portion structure J, as shown in FIG. 1A, the portion indicated by the circle becomes an air reservoir T, and the ventilation of the portion of the air reservoir T becomes insufficient. It is.
An object of the present invention is to improve the ventilation of the air reservoir T in the conventional basic structure J.

  Therefore, in the present invention, the front view (transverse section) shape of the ventilation port and the ventilation hole is changed from a substantially rectangular shape to a substantially circular shape (round through-hole), and the best load-bearing performance is adopted as necessary. He created a large number of locations.

That is, as illustrated in FIG. 1B, one or more ventilation holes are provided in the area S of the outer peripheral wall 10, and one or more ventilation holes are provided in the area R of the partition wall 20. It is.
In the area S, at least one, or two or more ventilation openings are arranged at the center and both ends of the position avoiding the intersection between the outer peripheral wall 10 and the partition wall 20.
On the other hand, in the area R, a plurality of portions are provided at portions where the air pockets T are generated at positions where the intersections between the partition walls 20 and the intersections between the partition walls 20 and the outer peripheral wall 10 are avoided.

  When the vent and the vent are provided at a position avoiding the basic reinforcing bars, the diameter and length of the round through-holes are appropriately restricted because they are provided in the gaps where the reinforcing bars are disposed. As will be described later, when the reinforcing bar is installed at the opening portion of the circular through hole, the diameter can be set to a certain extent and freely.

Thus, in the construction method of the building foundation according to the present invention, except for specific parts, the diameter and the arrangement location and the number of the vent holes and vent holes of the substantially circular shape (round shape) in front view are as follows. It can be set freely.
In this way, in the construction method of the building foundation according to the present invention, since the round ventilation port and the round ventilation hole can be appropriately installed at specific necessary locations, the moisture damage of the underfloor environment is prevented. It becomes possible to prevent well.

Hereinafter, the molds and the like used for the method of constructing the ventilation port and the ventilation hole will be specifically described.
FIG. 2 illustrates the first embodiment of the vent hole mold according to the present invention used when constructing the vent hole provided in the partition wall, where (A) is a front view and (B) is A side view, (C) is a perspective view of a fixing bracket for fixing the mold to a reinforcing bar.
FIG. 3 is a front view in which a part of a mold is removed after concrete beating according to the first embodiment.

The vent hole mold 13 shown here comprises a cylindrical paper-made void tube 26 and a pair of support fittings 27, 27 that support the void tube 26.
The pair of support fittings 27 are bilaterally symmetrical, and can hold and support the void tube 26 from both sides at a substantially central portion thereof.

The pair of support fittings 27, 27 are fixed to the reinforcing auxiliary muscle 34 and the auxiliary reinforcement 33 by the fixing fitting 28 at the upper end portion and the lower end portion thereof.
That is, at the upper end portion thereof, the reinforcing accessory bar 34 is adapted to the notch portion 27k provided in the support fittings 27, 27, and the upward cut portion 27h provided in the support fittings 27, 27 is also provided at the lower end portion thereof. The auxiliary muscles 33 are fitted to the fitting portions, and both the arm portions 28u of the substantially U-shaped fixing bracket 28 are fitted to these fitting portions.

Both arm portions 28u of the fixing bracket 28 are respectively provided with lateral cut portions 28k. These lateral cut portions 28k are adapted to the reinforcing auxiliary muscle 34 and the auxiliary muscle 33, and the void tube 26 is connected to the arm 28u. Both the holding | maintenance metal fittings 27 and 27 hold | maintained are fixed to a reinforcing bar at the upper end part and lower end part, respectively.
The fixing bracket 28 is an example, and the form of the fixing bracket can be freely changed in design.
Alternatively, it can be fixed by a binding wire instead of the fixing metal 28.

Thereafter, concrete is placed and FIG. 3 shows a state where the void pipe 26 is removed.
As can be seen from FIG. 3, a vent hole 32 is formed between the stirrups 35, 35 of the partition wall 20, and the support fittings 27, 27 are embedded in the partition wall 20 as reinforcement fittings as they are.

FIG. 4: shows 2nd Embodiment of the type | mold for vent holes which concerns on this invention provided in the partition wall of a building foundation, (A) is a partially cutaway side view, (B) is a partially cutaway front view It is.
FIG. 5 is a front view showing a state in which the vent mold according to the second embodiment is incorporated in a reinforcing bar of a base part.
FIG. 6 shows a basic part completed by the vent or vent mold according to the second embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

The vent hole mold 14 according to the second embodiment has a configuration in which the streaks 35 penetrate in the vertical diameter direction of the cylindrical paper-made void tube 26.
Therefore, the stirrup 35 can directly form a basic reinforcing bar and can hold or support the void tube 26.

At the time of construction, the stirrup 35 of the vent hole mold 14 is fixed to the upper and lower main muscles 36 and the auxiliary muscles 33 and the void pipes 26 are arranged at appropriate positions. The openings at both ends of the void pipe 26 are circular balls. An opening lid portion 37 made of paper is covered, and this is fixed with an adhesive tape 38 such as a craft tape.
After the concrete is placed, the opening lid 37 and the void pipe 26 are removed to form the vent hole 32 (see FIG. 6).
In addition, in order to avoid complication in FIG. 5, illustration of the binding number wire | line which mutually fixes the site | part which a reinforcing bar cross | intersects is abbreviate | omitted (the same also in the following figures).

FIG. 7 is an exploded side view showing a third embodiment of the vent hole mold according to the present invention.
8A and 8B show the mold according to the third embodiment, in which FIG. 8A is a front explanatory view at the time of reinforcing bar assembly, and FIG. 8B is a side view of the mold.
FIG. 9 is a front view of the base portion in a state completed using the mold of the third embodiment.
FIG. 10 shows a basic part completed by the mold according to the third embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

The vent hole mold 15 shown here has a cylindrical shape, and includes a split mold 16 that is divided into two substantially in the direction transverse to the center, and a stirrup 35.
The split mold 16 has a substantially cylindrical shape, and includes a split body 16a and a split body 16b that are split into two in the transverse direction at a substantially central portion thereof.

The divided body 16a is a front mold member, and the divided body 16b is a rear mold member.
The opening edge (opening front edge part or opening rear edge part) of each divided body 16a, 16b has an inner diameter slightly larger than the connection edge part, and the inner peripheral wall surface is an opening part (opening front edge part or opening). It is formed in a tapered shape so that its inner diameter gradually increases toward the rear edge).

The connection edge part of both can be connected and fixed by fitting the connection edge part of one divided body 16b inside the connection edge part of the other divided body 16a.
FIG. 8B shows a state in which the two divided bodies 16a and 16b are connected to each other, but notches 16k and 16k are formed in the vertical diameter direction thereof (FIG. 7), and the streaks 35 are disposed. It is a possible structure.

Using the vent hole mold 15 having the above-described configuration, the upper end portion and the lower portion of the stirrup 35 can be fixed to the main reinforcement 36 and the return reinforcement 33 and incorporated into the reinforcement.
Then, after placing concrete, the divided bodies 16a and 16b are pulled out to the outside of the foundation, and the air holes 31 are formed. FIG. 9 shows a portion of the partition wall 20 constructed using the vent hole mold 15.

  In FIG. 10, the completed state of the base portion can be seen. As can be seen from the longitudinal sectional view (B), the vent hole 31 faces the leading edge of the opening or the trailing edge of the opening, respectively, from the portion of the stirrup 35. It can be seen that the inner peripheral surface is formed in a tapered shape so as to expand.

11A and 11B show a ventilator mold according to the fourth embodiment of the present invention, in which FIG. 11A is a main part front view and FIG. 11B is a main part side view.
FIG. 12 shows a mold according to the fourth embodiment, in which (A) is an explanatory front view of construction and (B) is a side view.
FIG. 13: shows the ventilation opening completed with the type | mold which concerns on the said 4th Embodiment, The (A) is a front view, The (B) is a longitudinal cross-sectional view.

This mold is an expansion part forming mold 41 for forming both sides and lower side parts (lower part from the center part) of the outer side opening part of the ventilation opening 30 provided on the outer peripheral wall 10 to the outside. Is added. The expansion part forming die 41 can be press-molded using a plated steel plate.
The void tube 26 can be easily joined with an adhesive tape such as a craft tape at the joining portion. The expansion part forming die 41 made of the plated steel sheet can be used repeatedly.

The outer opening of the ventilation port 30 completed by adding the expansion part forming die 41 has its lower part expanded outward from the center part and exhibits its effect on the discharge of rainwater and the like. It becomes.
Further, an insect repellent and fender-proof lattice frame 50 is fitted to the reinforcing bar arrangement portion of the ventilation port 30. This lattice frame serves as a lid for insectproofing, antifungal and the like.

In this embodiment, the lattice frame 50 is disposed inside the reinforcing bar, but can be fitted to the outside of the reinforcing bar, or can be provided at the opening edge on the outside of the ventilation port 30.
In the fourth embodiment, as in the second embodiment, the stirrup 35 is disposed in a substantially central vertical direction, and the reinforcing bar can be confirmed from the opening.
In FIG. 11A, a portion indicated by a two-dot chain line in the left half indicates a portion where an opening lid portion made of cardboard is disposed in this portion.

FIG. 14 illustrates a fifth embodiment of the vent hole mold according to the present invention, in which (A) is a front view and (B) is a side view.
FIG. 15 shows a construction state of the fifth embodiment, in which (A) is a front view and (B) is a side view.
FIG. 16 shows an outer peripheral wall completed using the vent opening mold of the fifth embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

The vent hole mold 8 shown in these drawings is a vent hole mold according to the fourth embodiment, which uses a bi-split type (the same type as the third embodiment) instead of the void tube.
That is, the cutout portions 8k and 8k are respectively provided in the vertical diameter portions of the divided body 8a and the divided body 8b of the vent hole mold 8, and the streaks 35 are disposed in the cutout portions 8k and 8k.

That is, in the vent hole mold 8, the reinforcing bars are arranged in a single vertical character in the vertical direction, and the reinforcing bars support the divided bodies 8a and 8b and play a reinforcing role.
Also in the fifth embodiment, as can be seen from the ventilation port 30 shown in FIG. 16, the reinforcing bars are arranged in a single vertical character at the ventilation port 30 portion of the outer peripheral wall 10 and the lattice frame 50 for insect and fungus protection is provided. It is arranged.
Accordingly, the vent holes 30 of the outer peripheral wall 10 constructed by using the mold according to the present invention are arranged so that the stirrup 35 and the reinforcing auxiliary muscle 34 can be seen, and it is possible to visually confirm the reinforcement of the portion. It can be done.

FIG. 17 shows a ventilator mold according to a sixth embodiment of the present invention, in which a substantially horizontal reinforcing bar is provided in addition to the mold according to the fourth embodiment shown in FIGS. 11 to 13 above. (A) is a principal part front view, and (B) is a principal part side view.
FIG. 18: shows the type | mold which concerns on the said 6th Embodiment, The (A) is construction front explanatory drawing, The (B) is a side view.
FIG. 19 shows a ventilation port completed by the mold according to the sixth embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

  This mold is an expansion part forming mold 41 for forming both sides and lower side parts (lower part from the center part) of the outer side opening part of the ventilation opening 30 provided on the outer peripheral wall 10 to the outside. Is added to the void tube 26. The expansion part forming die 41 can be press-molded using a plated steel plate.

The void tube 26 can be easily joined with an adhesive tape such as a craft tape at the joining portion. The expansion part forming die 41 made of the plated steel sheet can be used repeatedly.
Further, in the sixth embodiment, as is apparent from the figure, the reinforcing auxiliary bars 34 are arranged in the diameter direction in a substantially horizontal direction to further improve the strength.

The outer opening of the ventilation port 30 completed by adding the expansion part forming die 41 has its lower part expanded outward from its central part and exhibits its effect on the discharge of rainwater and the like. It becomes.
Further, an insect repellent and fender-proof lattice frame 50 is fitted to the reinforcing bar arrangement portion of the ventilation port 30. This lattice frame serves as a lid for insectproofing, antifungal and the like.

In this embodiment, the lattice frame 50 is disposed inside the reinforcing bar, but can be fitted to the outside of the reinforcing bar, or can be provided at the opening edge on the outside of the ventilation port 30.
As described above, in the sixth embodiment, the reinforcing auxiliary bars 34 are added in the substantially horizontal diameter direction in the fourth embodiment, and a cross-shaped reinforcing bar is arranged in the opening of the completed ventilation opening 30. It can be confirmed that it is installed.

FIG. 20 shows a vent hole mold according to a seventh embodiment of the present invention, in which reinforcing bars are arranged and added in a substantially horizontal direction in addition to the mold according to the fifth embodiment shown in FIGS. (A) is a principal part front view, and (B) is a principal part side view.
FIG. 21 shows a mold according to the seventh embodiment, in which (A) is an explanatory front view of construction and (B) is a side view.
FIG. 22 shows a ventilation port completed by the mold according to the seventh embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

The vent hole mold 18 shown in these drawings is a horizontal vent hole mold comprising a split body 18a as a front part member of a two-part split type and a split body 16b as a rear part member according to the fifth embodiment. Directional accessory muscles 34 are added.
That is, notches are respectively provided in the vertical diameter portions of the divided body 18a and the divided body 16b of the vent hole mold 18, and the ribs 35 are disposed in these notched portions, and this configuration is the fifth embodiment. Further, in order to dispose the horizontal accessory muscle 34, the divided body 18a is provided with a notch 18k, and the divided body 16b is provided with a notch 16j.

That is, in the vent hole mold 18, the reinforcing bars are arranged in a cross shape in the vertical direction and the horizontal direction, and the reinforcing bars support the divided bodies 18a and 16b and play a reinforcing role.
Also in the seventh embodiment, as will be understood from the ventilation port 30 shown in FIG. 22, the reinforcing bars 34 and 35 are arranged in a cross shape in the ventilation port 30 portion of the outer peripheral wall 10, and a lattice frame for insect prevention and protection. 50 is also provided.

FIG. 23 is a front view showing a state where construction is performed using a vent opening mold in which vertical and horizontal reinforcing bars are arranged in a cross shape in the center of the void tube, and in addition to this, a reinforcing reinforcing bar is added. It is a thing.
In this way, a frame for a ventilation opening in which the ribs 35 and the reinforcing auxiliary bars 34 are arranged in a cross shape in the vertical diameter direction and the substantially horizontal diameter direction of the cylindrical void tube 26 is incorporated in the reinforcing bar, and further, the void tube 26 is surrounded. As described above, reinforcing reinforcing bars 39 and 39 can be provided around the periphery, and ventilation holes can be provided on the outer peripheral wall.

FIG. 24 illustrates a construction state using the vent hole mold according to the present invention, and illustrates a state in which two reinforcing bars as reinforcing reinforcing bars are arranged to reinforce the ventilation hole. .
Here, the vent hole mold 18 used is the one in the seventh embodiment. However, such a vent hole mold 18 is disposed, and the strength of the formed vent hole portion is further improved. In order to achieve this, reinforcing bars 39, 39 can be arranged around it.

FIG. 25 is a front view showing a ventilation port portion of the outer peripheral wall formed using the mold according to the present invention.
As shown in this figure, the reinforcing reinforcing bars can be easily arranged in an X shape instead of the cross shape as in the seventh embodiment shown in FIGS.
That is, two reinforcing bars 49 whose one end is bent at approximately 135 degrees are used and arranged in an X shape to be fixed to the main bar 36 and the sub bar 34. Also in this figure, the illustration of the binding wire for fixing the reinforcing bar is omitted.

As described above, in the present invention, a mold for a vent or a vent is formed by combining various types of molds and reinforcing bars, and a vent or a vent is formed using the construction method according to the present invention. Can do it.
As described above, various types of molds according to the present invention have been presented. However, the molds are for vents formed on the outer peripheral wall, and molds having the same configuration are for vent holes. It can be formed with various design changes.

As mentioned above, although embodiment of this invention was described, in this invention, various design changes are possible as follows.
First of all, the building foundation construction method according to the present invention can be carried out together with the foundation packing method currently being carried out.

That is, it can be constructed as a foundation of a building by using only the construction method according to the present invention, or can be constructed together with the foundation packing method currently being performed.
In the conventional basic packing method, since there is a limit to expanding the area of the ventilation port more than before, by adopting the construction method of the present invention together, it can contribute to the improvement of the underfloor environment. Because.
As described above, it is appropriate to provide a plurality of ventilation openings provided on the outer peripheral wall serving as the external foundation at the most suitable location according to the environment of the installation location of the building.

It is appropriate to provide a plurality of air holes in the partition wall, which is the internal foundation, at the location of the internal foundation where air is trapped, especially in the vicinity of the intersection of the partition walls or in the vicinity of the intersection of the partition wall and the outer peripheral wall. suitable.
In the present invention, the necessary number of ventilation ports and ventilation holes can be provided as appropriate by the reinforcement structure in which the ventilation holes and ventilation holes made of round through holes and the reinforcing bars are arranged in the round penetration holes. The inner diameter of the through hole can be appropriately designed as necessary.

  Thus, in the present invention, the reason why the inner diameter of the ventilation port or the ventilation hole can be designed to be large as necessary is that, as already described, the reinforcing bar is formed in a single letter, cross or X shape in the through hole. This is because the reinforcing structure that is visible by these reinforcing bars is adopted.

In addition, the various types of molds described in the above embodiment can be used for either a ventilation port provided in the outer peripheral wall or a vent hole provided in the partition wall.
It is because it can be used as appropriate for a ventilation port or a ventilation hole by changing its size and the like as appropriate.

  When a vent or vent is provided between the locations of the reinforcing bars in the foundation, the diameter of the round through hole is restricted as appropriate. Therefore, when the construction is performed in such a manner that the reinforcing bars can be visually observed, the diameter size can be increased as required.

  When reinforcing bars are provided in the ventilation port and the ventilation hole, since these reinforcing bars are exposed to the outside air and rain and wind, it is extremely preferable to use reinforcing bars that have been subjected to hot dip galvanization.

Although the two-divided type used in the above embodiment is implemented as being divided into two in the transverse direction of the intermediate portion, it can also be implemented as being divided into two in the longitudinal direction.
These two-divided dies can be manufactured by press-molding a metal plate material, and can also be constructed as an embedded type in the basic concrete.

Moreover, the structure of a division body can also be designed freely freely and the specific structure is free. In short, any structure can be used as long as the divided bodies can be connected and fixed and separated.
Of course, in the embedded type, it is also possible to adopt a configuration that cannot be separated.

  As described above, in the present invention, various types of ventilation holes that can form round through holes or construction methods for providing round ventilation holes and ventilation holes on the foundation of a building using a vent hole mold, a support fitting, etc. We proposed various types of molds to be used, and we were able to propose ones that can well eliminate moisture damage in the underfloor environment.

DESCRIPTION OF SYMBOLS 10 Outer peripheral wall 13, 14, 15 Ventilation hole type | mold 8, 18 Ventilation hole type | mold 16 Split type 8a, 8b, 16a, 16b Divided body 8k, 16k Notch part 20 Partition wall 26 Void pipe 27 Support metal fitting 27k Notch part 28 Fixing bracket 28u Arm portion 28k Cut portion 30, 31 Ventilation port 32 Ventilation hole 33 Reinforcement 34 Reinforcement muscle 35 Stirrup 36 Main muscle 37 Opening lid portion 38 Adhesive tape 39, 49 Reinforcing bar 41 Mold for forming expanded portion 50 Lid Part J Building foundation T Air reservoir

  The present invention relates to a method for constructing a concrete foundation portion (a fabric foundation and a solid foundation) of a building, a mold used for the construction, and a support metal fitting for the mold, and in particular for the purpose of improving the underfloor environment, and improving ventilation and ventilation. It relates to the improvement of the basic part.

Due to recent demands for high durability and high earthquake resistance specifications required for excellent homes, the width of the fabric foundation rises and the transition (change) of the base foundation from discarded concrete to a solid foundation structure has become remarkable.
Therefore, in proportion to the "substantial increase in the covering volume of the foundation concrete", the occurrence of "evaporated water" with respect to the "bound water" in the "hydration progress" necessary for the concrete hardening that inevitably occurs, ie, " “Dissipation characteristics” have increased remarkably.
Therefore, since the “moisture dissipation phenomenon” occurs immediately after delivery of a new building, recognition and response to the occurrence of moisture damage is required, and if this response is mistaken, there is a high risk of having a large lesion in a subsequent building. There is a problem of becoming.

  There is also a method called `` forced ventilation '' using a fan or the like as a method for dealing with this, but because the problem such as noise and maintenance is envied, in the present invention, this method called forced ventilation is not adopted, It is intended to solve this problem by natural ventilation or partial improvement or addition to the foundation.

On the other hand, from the viewpoint of natural ventilation or natural ventilation, a construction method for building foundations called a foundation packing method has become the mainstream of modern times.
The initial method of this foundation packing method was a method in which a resin packing material was sandwiched between the foundation and the base at predetermined intervals in order to ensure underfloor ventilation.

The above-mentioned resin packing material is installed at a predetermined interval between the foundation and the base, but recently has a disadvantage that the base becomes uneven in a portion where no packing is provided. The basic packing long system that is laid on the entire surface is used.
That is, in this basic packing long, a method of performing ventilation through a plurality of through holes provided in the inside is adopted. As a result, an overall gap is formed between the foundation and the base, and ventilation and air permeability are ensured.
In this way, it is possible to eliminate the adverse effects caused by the phenomenon of moisture escaping from the foundation for 1 to 2 years after completion of the building.

And as for the current state of ventilation performance, the effective ventilation area is defined as 75 square cm or more per m by the Building Standard Law.
In the above-mentioned foundation packing method, the effective ventilation area is 101.76 square cm per m in the construction of the full-laying type foundation packing long.

On the other hand, in the case of fire draining, although there is no regulation by the Building Standard Law, in order to prevent the intrusion of flames due to fire from neighbors, etc., it is necessary to appropriately limit the opening area within a predetermined range. The current situation is that vendors are voluntarily restricting themselves.
Accordingly, in the basic packing method, the opening area of the fireproof drainer is limited, and the effective ventilation area cannot be increased any more.

  That is, even in this basic packing method, the ventilation performance and ventilation performance are not necessarily sufficient, and since various restrictions exist, further ventilation and ventilation efficiency cannot be improved. It is considered that the current situation is that it is necessary to review the construction method of natural ventilation in which a ventilation opening or a ventilation hole including an opening or a hole is provided in a conventional foundation.

Therefore, there is a need for additional measures in addition to the above basic packing method.
There are a variety of residential location environments. Currently, houses in areas that are susceptible to moisture damage, neighboring houses that are close to each other, or houses that are blocked from ventilation by obstacles. In order to be adversely affected by the above-mentioned underfloor ventilation environment under conditions that have many problems such as a house lacking curing treatment, a house with a complicated internal structure and a structure where air accumulation tends to occur, even after delivery of a new building In a dwelling house, the floor is exposed to phenomena such as moisture damage, condensation, decay, and puddles.

How can we solve this problem?
As described above, for example, a forced ventilation method using a fan or the like is also conceivable. However, in the present invention, the method of natural ventilation is searched without adopting this method.

  In the invention relating to “the basic structure of the building” described in Patent Document 1 below, the conventional vents and vents are utilized from the above viewpoint, and the arrangement, that is, the position of the vents, is devised to complete the invention. Is.

The problem is to prevent uneven ventilation under the floor of the building and to provide sufficient ventilation to the corners.
And the solution means is the partition wall which partitions the surrounding wall formed in the opposing wall surface and the inner space part of the surrounding wall in the foundation part of the building composed of the surrounding wall and the partition wall partitioning the inner space part of the surrounding wall. The first ventilation hole is formed in the opposite wall surface at the intersection.
A second ventilation hole is formed in the corner portion of the surrounding wall.
And the 3rd ventilation hole which connects each partitioned space part is formed in the cross | intersection part of the partition wall which faces the 1st ventilation hole formed in the opposing wall surface.

That is, in this prior art, a corner portion (second vent hole) of the surrounding wall, an intersection portion (first vent hole) between the surrounding wall and the partition wall, and an intersection portion between the partition wall and the partition wall ( A third ventilation hole) is provided.
According to the above solution, a ventilation port (first and second ventilation holes) or a ventilation hole (third ventilation hole) is disposed at the inner corner (corner corner) of the base, which is a portion where air accumulation is likely to occur. As a result, the retention of air is prevented.

Japanese Patent No. 4743399

However, in the basic structure of the building described in Patent Document 1, significant defects are lurking.
That is, it is a problem of the strength of the foundation.

  The first to third vent holes are provided at corners and intersections of the base portion, and are excellent in introducing outside air into the partitioned internal spaces, but have a wide opening. In addition, the position where the air holes are provided is a portion to which a very large building load is applied.

Therefore, it can be understood that the present invention is merely an idea with a very low practicality.
Therefore, in the present invention, the invention described in the above-mentioned patent document is further improved, and an object of the present invention is to provide a foundation construction method that can actually be constructed and can withstand the load of a building, and ventilation performance. In addition, an object of the present invention is to provide a construction method having extremely high ventilation performance.

  For this purpose, we mainly reviewed the surroundings of the internal foundation, provided ventilation holes that can be easily installed at all locations of the air reservoir and that can also be reinforced, and that the individual houses on the outer circumference foundation are free from the flow of outside air during the dry season. It aims at solving the problem by confirming beforehand and installing 4 to 6 ventilation openings at 2 to 3 locations in the relative direction of inflow and outflow.

  More specifically, in order to eliminate air accumulation in the internal foundation (part of the partition wall), a circular vent (through hole having a substantially circular cross section) is disposed at a specific position of the internal foundation, Peripheral foundations at positions corresponding to the ventilation environment (adjacent buildings, obstacles and dew road environment, etc.) and seasonal environment, especially the dry season (October to February) for buildings. The problem is to propose a structure that accelerates the flow of underfloor air by installing a round ventilation port on the outer wall.

In order to solve the above-mentioned problem, the first one of the present invention includes an outer peripheral wall located at an outer peripheral portion of a building foundation in which reinforcing bars are arranged, and a partition wall that partitions the inner space of the outer peripheral wall. In the construction method of a building foundation in which a ventilation port is provided in the outer peripheral wall and a vent hole is provided in the partition wall, the ventilation port provided in the outer peripheral wall of the foundation has a corner portion and a partition wall. Ventilation holes are provided in portions other than the intersections, and the ventilation holes provided in the partition walls are portions other than the intersections between the partition walls and the outer peripheral wall, and the partition walls are prone to air accumulation. provided in the vicinity of the intersection of the near and / or the outer peripheral wall of the intersection between the mold made of paper void tube substantially cylindrical the vents and the vent hole is closed the cross-sectional shape of substantially circular shape Formed through and penetrates the streaks in the vertical diameter direction of this mold The upper and lower sides of the stirrup are fixed to the foundation reinforcing bar, the mold is disposed at an appropriate position, the mold is removed after placing the concrete, and the vent and / or the vent hole is disposed. features site, stirrups arranged in the vertical direction of which is disposed in the foundation concrete reinforcing bars are arranged, the Rukoto be said stirrups are viewing in the vertical direction of the substantially central portion of the opening portion It is a construction method for building foundations.

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According to a second aspect of the present invention, in the first aspect of the present invention, the reinforcing abdominal muscles are further penetrated in the horizontal direction in the left-right diametrical direction through the mold forming the vent and the vent, and both ends of the reinforcing abdominal muscles are staggered. The building foundation construction method is characterized in that the reinforcing bars can be visually observed in a cross-sectional shape in front view at the opening portion.

According to a third aspect of the present invention, an outer peripheral wall located on an outer peripheral portion of a building foundation in which reinforcing bars are disposed, and a partition wall that partitions the inner space of the outer peripheral wall, In the construction method of a building foundation in which a ventilation port is provided and the partition wall is provided with a vent hole, the ventilation port provided in the outer peripheral wall of the foundation has a ventilation port in a portion other than the corner portion and the intersection with the partition wall. the provided, while the partition walls provided vent a portion other than the intersections between partition walls between the intersection and the outer peripheral wall, the vicinity of the intersection of easily the partition wall between cause air entrapment, and / or provided in the vicinity of the intersection of the outer peripheral wall, said vent and said vent hole is formed by using a mold consisting of a substantially cylindrical paper void tube to have a cross section of substantially circular shape, of the type Two reinforcing bars are penetrated in an X shape in the diagonal diameter direction, and this reinforcing bar Both ends are fixed to the foundation rebar, the mold is disposed at an appropriate position, the concrete is removed after the concrete is cast, and the foundation concrete is formed in the opening portion where the vent and / or the vent hole is disposed. reinforcement arranged in an X-shape of the disposed rebar is disposed within, building the reinforcement in an oblique radial direction X-shape of the opening site is characterized Rukoto be visible This is the foundation construction method.

Fourth ones of the present invention, in the first to third invention, the reinforcing bar is disposed in the vents and / or vent, characterized in that the molten zinc plating treatment is applied It is a construction method for building foundations.

According to a fifth aspect of the present invention, there is provided a paper void having a substantially cylindrical shape for forming a vent or a vent used in the building foundation construction method according to any one of the first to fourth aspects. It consists of a tube, and this mold is provided with streaks in the upper and lower diametrical directions, or crossed in two diametrical directions so as to cross each other, or in the X shape, streaks, reinforcing abs or reinforcing bars It is the type for a vent or the vent hole characterized by being provided .

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Sixth ones of the present invention, the first to vent or paper void tube type is cylindrical to form the vent holes are used in the method of constructing the building foundation according to the fourth one of The mold is divided into two front and rear at the middle part in the longitudinal direction, and the divided front mold member and rear mold member can be assembled to each other so that they can be connected to and detached from each other. Is provided with a notch where the streaks are arranged in the upper and lower diametrical directions, or in a cross shape in the two diametrical directions so as to intersect, or in the X shape, the stirrups, the reinforcing abdominal muscles, and the reinforcing bar reinforcing bars are arranged The vent or vent hole mold is characterized in that a cutout portion is provided.

According to a seventh aspect of the present invention, in the vent or vent hole mold according to the sixth aspect , the inner diameter of the front mold member is expanded from the connecting edge toward the opening front edge, and the rear mold. The inner diameter of the member is a vent or vent hole mold characterized in that the inner diameter of the member is expanded from the connecting edge toward the rear edge of the opening.

According to an eighth aspect of the present invention, in the vent opening mold according to the sixth aspect, the lower portion of the front opening of the front mold member is formed in an outwardly expanded state. It is an oral type.

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A ninth aspect of the present invention is the vent hole mold according to the fifth aspect of the present invention, in order to form the lower part of the opening located on the outside of the building of the mold in an expanded state outward. This is a vent opening type mold in which an expansion part forming mold is further added.

According to a tenth aspect of the present invention, in the construction method for a building foundation according to any one of the first to fourth aspects, reinforcing reinforcing bars are further disposed in the periphery of a portion where a ventilation hole or a vent hole is formed. It is a construction method for building foundations characterized by

According to an eleventh aspect of the present invention, in the building construction method according to any one of the first to fourth or tenth aspects of the present invention, an outer opening of the ventilation opening or an intermediate portion where the reinforcing bars are disposed. It is a construction method of a building foundation characterized by providing a breathable lid portion for preventing invasion of pests, moths and pests .

In the first aspect of the present invention, a round through-hole having a substantially circular cross-sectional shape of the ventilation port and the ventilation hole is used, and the one having the strongest form in load resistance performance is adopted.
Moreover, the ventilation port provided in the outer peripheral wall which becomes an outer periphery foundation is provided in parts other than the intersection part with the corner part and a partition wall, On the other hand, the vent hole provided in the partition wall used as an inner foundation is an intersection part of partition walls. and a portion other than the intersection of the outer peripheral wall, through the portion of the air pockets by providing in the vicinity of the intersection of the vicinity of the intersection between easily the partition wall occurs air reservoir and / or the outer peripheral wall Care was taken to arrange the pores.

Thereby, the building foundation which has favorable ventilation performance and ventilation performance, and also has the load bearing capability can be provided.
In addition, the ventilation port can be arranged at the most suitable position in consideration of the wind direction and the like according to the installation environment of the building. An underfloor environment where good ventilation and ventilation are performed can be realized.

  In the present invention, the stirrup disposed in the vertical direction among the reinforcing bars disposed in the foundation concrete is disposed in the opening portion where the ventilation hole and the vent hole are disposed, It is characterized in that the stirrup can be visually observed in the vertical direction of the substantially central portion, and a structure in which the reinforcing bar crosses in the vertical direction of the substantially central portion of the ventilation port and the ventilation hole is adopted. The strength of the portion is further improved.

In the second aspect of the present invention, as in the first aspect of the invention, the strength of the vent and the vent is improved. It is arranged in a shape so that it can be visually observed.

In the third aspect of the present invention, as in the first and second aspects of the present invention, the strength of the vent and the vent is improved, and reinforcing bars are provided at the openings of the vent and the vent. It is arranged in an X shape when viewed from the front so that it can be viewed.

In the 4th thing of this invention, it specified that the hot-dip galvanization process was performed to the reinforcing bar arrange | positioned at the said vent and / or a vent hole, These reinforcing bars are outside air and In order to be exposed to rain and wind, etc., anti-rust and anti-corrosion measures are taken.

According to the fifth aspect of the present invention, a mold for forming a vent or a vent used in the first to fourth construction method inventions is specified and claimed.

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In those of the sixth of the present invention, there is identified the type used in the construction method according to the first to fourth invention, the type consists paper void tube substantially cylindrical, its The front mold member and the rear mold member are divided into two parts at the front and rear at the middle part in the longitudinal direction, and the divided front mold member and the rear mold member can be assembled to each other so as to be freely connected to and detached from each other. Is provided, or is provided with a notch part in which the reinforcing bars are arranged in a cross shape or an X shape in two diametrical directions so as to intersect with each other. . The effect is the same as in the first to fourth inventions.

According to a seventh aspect of the present invention, in the mold according to the sixth aspect , the inner diameter of the front mold member is expanded from the connecting edge portion toward the opening front edge portion, and the inner diameter of the rear mold member is the connecting edge portion. It is characterized by being expanded toward the rear edge of the opening, and adopts a structure that can eliminate the intrusion of rainwater or the like into the floor.

According to an eighth aspect of the present invention, in the mold according to the sixth aspect , the lower portion of the front opening of the front mold member is formed in an outwardly expanded state, and the seventh aspect is provided. The same effect is exhibited.

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In the ninth aspect of the present invention, in the vent or vent mold according to the fifth aspect , the lower part of the opening located on the outside of the building of the mold is formed in an outwardly expanded state. In order to achieve this, an expansion portion forming mold is further added, and the same effect as in the tenth aspect of the present invention is added.

According to a tenth aspect of the present invention, in the construction methods according to the first to fourth aspects of the present invention, reinforcing reinforcing bars are further disposed in the periphery of a portion where a ventilation hole or a vent hole is formed. The reinforcement of the ventilation port or the vent hole is improved.

According to an eleventh aspect of the present invention, in the construction method according to the first to fourth or tenth aspects of the present invention, a pest, a moth and a pest are provided at an outer opening of a ventilation port or an intermediate portion where a reinforcing bar is disposed. It is provided with a cover that can be ventilated to prevent the intrusion of the insects and prevent insects and harmful animals from entering the floor.

It is an example of the foundation of a detached house, The (A) has shown the vent and the vent based on the conventional construction method, The (B) is explanatory drawing explaining the construction method which concerns on this invention . 1A and 1B show a first embodiment of a vent hole mold according to the present invention used when constructing a vent hole provided in a partition wall, in which (A) is a front view, (B) is a side view, (C) is a perspective view of a fixture for fixing the mold to the reinforcing bar. It is the front view which removed a part of type | mold after the concrete percussion concerning the said 1st Embodiment. 2nd Embodiment of the type | mold for vent holes which concerns on this invention provided in the outer peripheral wall or partition wall of a building foundation is shown, The (A) is a partially notched side view, The (B) is a partially notched front view. is there. It is a front view which shows the state which integrated the vent | die hole type | mold which concerns on the said 2nd Embodiment in the reinforcing bar of the base part. The foundation part completed with the type | mold for vent holes which concerns on the said 2nd Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. It is a disassembled side view which shows 3rd Embodiment of the type | mold for vent holes which concerns on this invention. The type | mold which concerns on the said 3rd Embodiment is shown, The (A) is the front view at the time of a reinforcement assembly | attachment construction, The (B) is a side view of a type | mold. It is a front view of the foundation part of the state completed using the type | mold of the said 3rd Embodiment. The basic part completed with the type | mold of the said 3rd Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. The type for ventilators which concerns on 4th Embodiment which concerns on this invention is shown, The (A) is a principal part front view, The (B) is a principal part side view. The type | mold which concerns on the said 4th Embodiment is shown, The (A) is construction front explanatory drawing, The (B) is a side view. The ventilation opening completed with the type | mold which concerns on the said 4th Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. The 5th Embodiment of the type for ventilators which concerns on this invention is illustrated, The (A) is a principal part front view, The (B) is a principal part side view. The construction state of the said 5th Embodiment is shown, The (A) is a front view, The (B) is a side view. The outer peripheral wall completed using the type | mold for ventilation openings of the said 5th Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. FIG. 11 shows a vent opening mold according to a sixth embodiment of the present invention, in which a substantially horizontal reinforcing bar is disposed and added in addition to the mold according to the fourth embodiment shown in FIGS. The (A) is a principal part front view, The (B) is a principal part side view. The type | mold which concerns on the said 6th Embodiment is shown, The (A) is construction front explanatory drawing, The (B) is a side view. The ventilation opening completed with the type | mold which concerns on the said 6th Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. The vent die according to the seventh embodiment of the present invention is shown, and a substantially horizontal reinforcing bar is provided in addition to the die according to the fifth embodiment shown in FIGS. The (A) is a principal part front view, The (B) is a principal part side view. The type | mold which concerns on the said 7th Embodiment is shown, The (A) is construction front explanatory drawing, The (B) is a side view. The ventilation opening completed with the type | mold which concerns on the said 7th Embodiment is shown, The (A) is a front view, The (B) is a longitudinal cross-sectional view. It is the construction state front view which shows the other embodiment which concerns on this invention, and shows the state constructed | assembled using the type | mold for ventilators which arrange | positioned the vertical and horizontal rebar in the center of the void pipe in the shape of a cross. Reinforcing bars are added. The other embodiment which concerns on this invention is shown, and the construction state using the type | mold for vent openings of the said 7th Embodiment was illustrated, In addition to this, the two reinforcement bars as a reinforcement reinforcement were arrange | positioned. The state is illustrated. It is a front view which shows the ventilation port part of other embodiment which concerns on this invention, Comprising: The thing which has arrange | positioned the reinforcing bar in X shape is shown.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows an example of a foundation of a detached house, in which (A) shows a vent and a vent based on a conventional construction method, and (B) explains a construction method according to the present invention. It is explanatory drawing.

As shown in FIG. 1 (A), in the conventional construction method, an outer peripheral wall 10 that constitutes an outer peripheral foundation that surrounds the four sides of a building, and a partition wall 20 as an inner foundation that partitions the inside of the outer peripheral wall 10; In the building foundation composed of the above, the outer peripheral wall 10 is provided with an appropriate number of ventilation ports 11, and the partition wall 20 is provided with a plurality of vent holes 21 for underfloor ventilation.
In the figure, there is a part where the ventilation hole is located, which serves as a passage for underfloor maintenance. However, in the present invention, the ventilation hole and the ventilation hole are the themes. The maintenance passage is out of sight.

The vent hole 11 and the vent hole 21 are formed from through holes having a substantially rectangular shape when viewed from the front.
In this conventional foundation part structure J, outside air is introduced from the ventilation port 10, flows through the ventilation hole 21 provided in the partition wall 20, flows out from the ventilation port 10 on the opposite side, and is ventilated. is there. The arrows in the figure indicate the air flow.

However, in the conventional base portion structure J, as shown in FIG. 1A, the portion indicated by the circle becomes an air reservoir T, and the ventilation of the portion of the air reservoir T becomes insufficient. It is.
An object of the present invention is to improve the ventilation of the air reservoir T in the conventional basic structure J.

  Therefore, in the present invention, the front view (transverse section) shape of the ventilation port and the ventilation hole is changed from a substantially rectangular shape to a substantially circular shape (round through-hole), and the best load-bearing performance is adopted as necessary. He created a large number of locations.

That is, as illustrated in FIG. 1B, one or more ventilation holes are provided in the area S of the outer peripheral wall 10, and one or more ventilation holes are provided in the area R of the partition wall 20. It is.
In the area S, at least one, or two or more ventilation openings are arranged at the center and both ends of the position avoiding the intersection between the outer peripheral wall 10 and the partition wall 20.
On the other hand, in the area R, a plurality of portions are provided at portions where the air pockets T are generated at positions where the intersections between the partition walls 20 and the intersections between the partition walls 20 and the outer peripheral wall 10 are avoided.

  When the vent and the vent are provided at a position avoiding the basic reinforcing bars, the diameter and length of the round through-holes are appropriately restricted because they are provided in the gaps where the reinforcing bars are disposed. As will be described later, when the reinforcing bar is installed at the opening portion of the circular through hole, the diameter can be set to a certain extent and freely.

Thus, in the construction method of the building foundation according to the present invention, except for specific parts, the diameter and the arrangement location and the number of the vent holes and vent holes of the substantially circular shape (round shape) in front view are as follows. It can be set freely.
In this way, in the construction method of the building foundation according to the present invention, since the round ventilation port and the round ventilation hole can be appropriately installed at specific necessary locations, the moisture damage of the underfloor environment is prevented. It becomes possible to prevent well.

Hereinafter, the molds and the like used for the method of constructing the ventilation port and the ventilation hole will be specifically described.
FIG. 2 illustrates the first embodiment of the vent hole mold according to the present invention used when constructing the vent hole provided in the partition wall, where (A) is a front view and (B) is A side view, (C) is a perspective view of a fixing bracket for fixing the mold to a reinforcing bar.
FIG. 3 is a front view in which a part of a mold is removed after concrete beating according to the first embodiment.

The vent hole mold 13 shown here comprises a cylindrical paper-made void tube 26 and a pair of support fittings 27, 27 that support the void tube 26.
The pair of support fittings 27 are bilaterally symmetrical, and can hold and support the void tube 26 from both sides at a substantially central portion thereof.

The pair of support fittings 27, 27 are fixed to the reinforcing auxiliary muscle 34 and the auxiliary reinforcement 33 by the fixing fitting 28 at the upper end portion and the lower end portion thereof.
That is, at the upper end portion thereof, the reinforcing accessory bar 34 is adapted to the notch portion 27k provided in the support fittings 27, 27, and the upward cut portion 27h provided in the support fittings 27, 27 is also provided at the lower end portion thereof. The auxiliary muscles 33 are fitted to the fitting portions, and both the arm portions 28u of the substantially U-shaped fixing bracket 28 are fitted to these fitting portions.

Both arm portions 28u of the fixing bracket 28 are respectively provided with lateral cut portions 28k. These lateral cut portions 28k are adapted to the reinforcing auxiliary muscle 34 and the auxiliary muscle 33, and the void tube 26 is connected to the arm 28u. Both the holding | maintenance metal fittings 27 and 27 hold | maintained are fixed to a reinforcing bar at the upper end part and lower end part, respectively.
The fixing bracket 28 is an example, and the form of the fixing bracket can be freely changed in design.
Alternatively, it can be fixed by a binding wire instead of the fixing metal 28.

Thereafter, concrete is placed and FIG. 3 shows a state where the void pipe 26 is removed.
As can be seen from FIG. 3, a vent hole 32 is formed between the stirrups 35, 35 of the partition wall 20, and the support fittings 27, 27 are embedded in the partition wall 20 as reinforcement fittings as they are.

FIG. 4: shows 2nd Embodiment of the type | mold for vent holes which concerns on this invention provided in the partition wall of a building foundation, (A) is a partially cutaway side view, (B) is a partially cutaway front view It is.
FIG. 5 is a front view showing a state in which the vent mold according to the second embodiment is incorporated in a reinforcing bar of a base part.
FIG. 6 shows a basic part completed by the vent or vent mold according to the second embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

The vent hole mold 14 according to the second embodiment has a configuration in which the streaks 35 penetrate in the vertical diameter direction of the cylindrical paper-made void tube 26.
Therefore, the stirrup 35 can directly form a basic reinforcing bar and can hold or support the void tube 26.

At the time of construction, the stirrup 35 of the vent hole mold 14 is fixed to the upper and lower main muscles 36 and the auxiliary muscles 33 and the void pipes 26 are arranged at appropriate positions. The openings at both ends of the void pipe 26 are circular balls. An opening lid portion 37 made of paper is covered, and this is fixed with an adhesive tape 38 such as a craft tape.
After the concrete is placed, the opening lid 37 and the void pipe 26 are removed to form the vent hole 32 (see FIG. 6).
In addition, in order to avoid complication in FIG. 5, illustration of the binding number wire | line which mutually fixes the site | part which a reinforcing bar cross | intersects is abbreviate | omitted (the same also in the following figures).

FIG. 7 is an exploded side view showing a third embodiment of the vent hole mold according to the present invention.
8A and 8B show the mold according to the third embodiment, in which FIG. 8A is a front explanatory view at the time of reinforcing bar assembly, and FIG. 8B is a side view of the mold.
FIG. 9 is a front view of the base portion in a state completed using the mold of the third embodiment.
FIG. 10 shows a basic part completed by the mold according to the third embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

The vent hole mold 15 shown here has a cylindrical shape, and includes a split mold 16 that is divided into two substantially in the direction transverse to the center, and a stirrup 35.
The split mold 16 has a substantially cylindrical shape, and includes a split body 16a and a split body 16b that are split into two in the transverse direction at a substantially central portion thereof.

The divided body 16a is a front mold member, and the divided body 16b is a rear mold member.
The opening edge (opening front edge part or opening rear edge part) of each divided body 16a, 16b has an inner diameter slightly larger than the connection edge part, and the inner peripheral wall surface is an opening part (opening front edge part or opening). It is formed in a tapered shape so that its inner diameter gradually increases toward the rear edge).

The connection edge part of both can be connected and fixed by fitting the connection edge part of one divided body 16b inside the connection edge part of the other divided body 16a.
FIG. 8B shows a state in which the two divided bodies 16a and 16b are connected to each other, but notches 16k and 16k are formed in the vertical diameter direction thereof (FIG. 7), and the streaks 35 are disposed. It is a possible structure.

Using the vent hole mold 15 having the above-described configuration, the upper end portion and the lower portion of the stirrup 35 can be fixed to the main reinforcement 36 and the return reinforcement 33 and incorporated into the reinforcement.
Then, after placing concrete, the divided bodies 16a and 16b are pulled out to the outside of the foundation, and the air holes 31 are formed. FIG. 9 shows a portion of the partition wall 20 constructed using the vent hole mold 15.

  In FIG. 10, the completed state of the base portion can be seen. As can be seen from the longitudinal sectional view (B), the vent hole 31 faces the leading edge of the opening or the trailing edge of the opening, respectively, from the portion of the stirrup 35. It can be seen that the inner peripheral surface is formed in a tapered shape so as to expand.

11A and 11B show a ventilator mold according to the fourth embodiment of the present invention, in which FIG. 11A is a main part front view and FIG. 11B is a main part side view.
FIG. 12 shows a mold according to the fourth embodiment, in which (A) is an explanatory front view of construction and (B) is a side view.
FIG. 13: shows the ventilation opening completed with the type | mold which concerns on the said 4th Embodiment, The (A) is a front view, The (B) is a longitudinal cross-sectional view.

This mold is an expansion part forming mold 41 for forming both sides and lower side parts (lower part from the center part) of the outer side opening part of the ventilation opening 30 provided on the outer peripheral wall 10 to the outside. Is added. The expansion part forming die 41 can be press-molded using a plated steel plate.
The void tube 26 can be easily joined with an adhesive tape such as a craft tape at the joining portion. The expansion part forming die 41 made of the plated steel sheet can be used repeatedly.

The outer opening of the ventilation port 30 completed by adding the expansion part forming die 41 has its lower part expanded outward from the center part and exhibits its effect on the discharge of rainwater and the like. It becomes.
Further, an insect repellent and fender-proof lattice frame 50 is fitted to the reinforcing bar arrangement portion of the ventilation port 30. This lattice frame serves as a lid for insectproofing, antifungal and the like.

In this embodiment, the lattice frame 50 is disposed inside the reinforcing bar, but can be fitted to the outside of the reinforcing bar, or can be provided at the opening edge on the outside of the ventilation port 30.
In the fourth embodiment, as in the second embodiment, the stirrup 35 is disposed in a substantially central vertical direction, and the reinforcing bar can be confirmed from the opening.
In FIG. 11A, a portion indicated by a two-dot chain line in the left half indicates a portion where an opening lid portion made of cardboard is disposed in this portion.

FIG. 14 illustrates a fifth embodiment of the vent hole mold according to the present invention, in which (A) is a front view and (B) is a side view.
FIG. 15 shows a construction state of the fifth embodiment, in which (A) is a front view and (B) is a side view.
FIG. 16 shows an outer peripheral wall completed using the vent opening mold of the fifth embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

The vent hole mold 8 shown in these drawings is a vent hole mold according to the fourth embodiment, which uses a bi-split type (the same type as the third embodiment) instead of the void tube.
That is, the cutout portions 8k and 8k are respectively provided in the vertical diameter portions of the divided body 8a and the divided body 8b of the vent hole mold 8, and the streaks 35 are disposed in the cutout portions 8k and 8k.

That is, in the vent hole mold 8, the reinforcing bars are arranged in a single vertical character in the vertical direction, and the reinforcing bars support the divided bodies 8a and 8b and play a reinforcing role.
Also in the fifth embodiment, as can be seen from the ventilation port 30 shown in FIG. 16, the reinforcing bars are arranged in a single vertical character at the ventilation port 30 portion of the outer peripheral wall 10 and the lattice frame 50 for insect and fungus protection is provided. It is arranged.
Accordingly, the vent holes 30 of the outer peripheral wall 10 constructed by using the mold according to the present invention are arranged so that the stirrup 35 and the reinforcing auxiliary muscle 34 can be seen, and it is possible to visually confirm the reinforcement of the portion. It can be done.

FIG. 17 shows a ventilator mold according to a sixth embodiment of the present invention, in which a substantially horizontal reinforcing bar is provided in addition to the mold according to the fourth embodiment shown in FIGS. 11 to 13 above. (A) is a principal part front view, and (B) is a principal part side view.
FIG. 18: shows the type | mold which concerns on the said 6th Embodiment, The (A) is construction front explanatory drawing, The (B) is a side view.
FIG. 19 shows a ventilation port completed by the mold according to the sixth embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

  This mold is an expansion part forming mold 41 for forming both sides and lower side parts (lower part from the center part) of the outer side opening part of the ventilation opening 30 provided on the outer peripheral wall 10 to the outside. Is added to the void tube 26. The expansion part forming die 41 can be press-molded using a plated steel plate.

The void tube 26 can be easily joined with an adhesive tape such as a craft tape at the joining portion. The expansion part forming die 41 made of the plated steel sheet can be used repeatedly.
Further, in the sixth embodiment, as is apparent from the figure, the reinforcing auxiliary bars 34 are arranged in the diameter direction in a substantially horizontal direction to further improve the strength.

The outer opening of the ventilation port 30 completed by adding the expansion part forming die 41 has its lower part expanded outward from its central part and exhibits its effect on the discharge of rainwater and the like. It becomes.
Further, an insect repellent and fender-proof lattice frame 50 is fitted to the reinforcing bar arrangement portion of the ventilation port 30. This lattice frame serves as a lid for insectproofing, antifungal and the like.

In this embodiment, the lattice frame 50 is disposed inside the reinforcing bar, but can be fitted to the outside of the reinforcing bar, or can be provided at the opening edge on the outside of the ventilation port 30.
As described above, in the sixth embodiment, the reinforcing auxiliary bars 34 are added in the substantially horizontal diameter direction in the fourth embodiment, and a cross-shaped reinforcing bar is arranged in the opening of the completed ventilation opening 30. It can be confirmed that it is installed.

FIG. 20 shows a vent hole mold according to a seventh embodiment of the present invention, in which reinforcing bars are arranged and added in a substantially horizontal direction in addition to the mold according to the fifth embodiment shown in FIGS. (A) is a principal part front view, and (B) is a principal part side view.
FIG. 21 shows a mold according to the seventh embodiment, in which (A) is an explanatory front view of construction and (B) is a side view.
FIG. 22 shows a ventilation port completed by the mold according to the seventh embodiment, in which (A) is a front view and (B) is a longitudinal sectional view.

The vent hole mold 18 shown in these drawings is a horizontal vent hole mold comprising a split body 18a as a front part member of a two-part split type and a split body 16b as a rear part member according to the fifth embodiment. Directional accessory muscles 34 are added.
That is, notches are respectively provided in the vertical diameter portions of the divided body 18a and the divided body 16b of the vent hole mold 18, and the ribs 35 are disposed in these notched portions, and this configuration is the fifth embodiment. Further, in order to dispose the horizontal accessory muscle 34, the divided body 18a is provided with a notch 18k, and the divided body 16b is provided with a notch 16j.

That is, in the vent hole mold 18, the reinforcing bars are arranged in a cross shape in the vertical direction and the horizontal direction, and the reinforcing bars support the divided bodies 18a and 16b and play a reinforcing role.
Also in the seventh embodiment, as will be understood from the ventilation port 30 shown in FIG. 22, the reinforcing bars 34 and 35 are arranged in a cross shape in the ventilation port 30 portion of the outer peripheral wall 10, and a lattice frame for insect prevention and protection. 50 is also provided.

FIG. 23 is a front view showing a state where construction is performed using a vent opening mold in which vertical and horizontal reinforcing bars are arranged in a cross shape in the center of the void tube, and in addition to this, a reinforcing reinforcing bar is added. It is a thing.
In this way, a frame for a ventilation opening in which the ribs 35 and the reinforcing auxiliary bars 34 are arranged in a cross shape in the vertical diameter direction and the substantially horizontal diameter direction of the cylindrical void tube 26 is incorporated in the reinforcing bar, and further, the void tube 26 is surrounded. As described above, reinforcing reinforcing bars 39 and 39 can be provided around the periphery, and ventilation holes can be provided on the outer peripheral wall.

FIG. 24 illustrates a construction state using the vent hole mold according to the present invention, and illustrates a state in which two reinforcing bars as reinforcing reinforcing bars are arranged to reinforce the ventilation hole. .
Here, the vent hole mold 18 used is the one in the seventh embodiment. However, such a vent hole mold 18 is disposed, and the strength of the formed vent hole portion is further improved. In order to achieve this, reinforcing bars 39, 39 can be arranged around it.

FIG. 25 is a front view showing a ventilation port portion of the outer peripheral wall formed using the mold according to the present invention.
As shown in this figure, the reinforcing reinforcing bars can be easily arranged in an X shape instead of the cross shape as in the seventh embodiment shown in FIGS.
That is, two reinforcing bars 49 whose one end is bent at approximately 135 degrees are used and arranged in an X shape to be fixed to the main bar 36 and the sub bar 34. Also in this figure, the illustration of the binding wire for fixing the reinforcing bar is omitted.

As described above, in the present invention, a mold for a vent or a vent is formed by combining various types of molds and reinforcing bars, and a vent or a vent is formed using the construction method according to the present invention. Can do it.
As described above, various types of molds according to the present invention have been presented. However, the molds are for vents formed on the outer peripheral wall, and molds having the same configuration are for vent holes. It can be formed with various design changes.

As mentioned above, although embodiment of this invention was described, in this invention, various design changes are possible as follows.
First of all, the building foundation construction method according to the present invention can be carried out together with the foundation packing method currently being carried out.

That is, it can be constructed as a foundation of a building by using only the construction method according to the present invention, or can be constructed together with the foundation packing method currently being performed.
In the conventional basic packing method, since there is a limit to expanding the area of the ventilation port more than before, by adopting the construction method of the present invention together, it can contribute to the improvement of the underfloor environment. Because.
As described above, it is appropriate to provide a plurality of ventilation openings provided on the outer peripheral wall serving as the external foundation at the most suitable location according to the environment of the installation location of the building.

It is appropriate to provide a plurality of air holes in the partition wall, which is the internal foundation, at the location of the internal foundation where air is trapped, especially in the vicinity of the intersection of the partition walls or in the vicinity of the intersection of the partition wall and the outer peripheral wall. suitable.
In the present invention, the necessary number of ventilation ports and ventilation holes can be provided as appropriate by the reinforcement structure in which the ventilation holes and ventilation holes made of round through holes and the reinforcing bars are arranged in the round penetration holes. The inner diameter of the through hole can be appropriately designed as necessary.

  Thus, in the present invention, the reason why the inner diameter of the ventilation port or the ventilation hole can be designed to be large as necessary is that, as already described, the reinforcing bar is formed in a single letter, cross or X shape in the through hole. This is because the reinforcing structure that is visible by these reinforcing bars is adopted.

In addition, the various types of molds described in the above embodiment can be used for either a ventilation port provided in the outer peripheral wall or a vent hole provided in the partition wall.
It is because it can be used as appropriate for a ventilation port or a ventilation hole by changing its size and the like as appropriate.

  When a vent or vent is provided between the locations of the reinforcing bars in the foundation, the diameter of the round through hole is restricted as appropriate. Therefore, when the construction is performed in such a manner that the reinforcing bars can be visually observed, the diameter size can be increased as required.

  When reinforcing bars are provided in the ventilation port and the ventilation hole, since these reinforcing bars are exposed to the outside air and rain and wind, it is extremely preferable to use reinforcing bars that have been subjected to hot dip galvanization.

Although the two-divided type used in the above embodiment is implemented as being divided into two in the transverse direction of the intermediate portion, it can also be implemented as being divided into two in the longitudinal direction.
These two-divided dies can be manufactured by press-molding a metal plate material, and can also be constructed as an embedded type in the basic concrete.

Moreover, the structure of a division body can also be designed freely freely and the specific structure is free. In short, any structure can be used as long as the divided bodies can be connected and fixed and separated.
Of course, in the embedded type, it is also possible to adopt a configuration that cannot be separated.

  As described above, in the present invention, various types of ventilation holes that can form round through holes or construction methods for providing round ventilation holes and ventilation holes on the foundation of a building using a vent hole mold, a support fitting, etc. We proposed various types of molds to be used, and we were able to propose ones that can well eliminate moisture damage in the underfloor environment.

DESCRIPTION OF SYMBOLS 10 Outer peripheral wall 13, 14, 15 Ventilation hole type | mold 8, 18 Ventilation hole type | mold 16 Split type 8a, 8b, 16a, 16b Divided body 8k, 16k Notch part 20 Partition wall 26 Void pipe 27 Support metal fitting 27k Notch part 28 Fixing bracket 28u Arm portion 28k Cut portion 30, 31 Ventilation port 32 Ventilation hole 33 Reinforcement 34 Reinforcement muscle 35 Stirrup 36 Main muscle 37 Opening lid portion 38 Adhesive tape 39, 49 Reinforcing bar 41 Mold for forming expanded portion 50 Lid Part J Building foundation T Air reservoir

Claims (15)

A building foundation comprising an outer peripheral wall located at the outer peripheral portion of the building foundation and a partition wall partitioning the internal space of the outer peripheral wall, wherein the outer peripheral wall is provided with a vent and the partition wall is provided with a vent hole. In the construction method of
The ventilation port provided in the outer peripheral wall of the foundation is provided with a ventilation port in a portion other than the intersection with the corner portion and the partition wall,
On the other hand, the vent hole provided in the partition wall is a portion other than the intersection between the partition walls and the intersection with the outer peripheral wall, and near the intersection between the partition walls and / or the intersection with the outer peripheral wall. In the vicinity of
The construction method of a building foundation, wherein the ventilation port and the ventilation hole have a substantially circular cross-sectional shape.   In the opening part in which the ventilation port and / or the ventilation hole are provided, the stirrup arranged in the vertical direction among the reinforcing bars arranged in the foundation concrete is arranged, and the substantially central part of the opening part The construction method of the building foundation according to claim 1, wherein the stirrup is visible in the vertical direction.   At the opening part where the ventilation hole and / or the ventilation hole are arranged, the stirrup bars arranged in the vertical direction of the reinforcing bars arranged in the basic concrete and the reinforcing auxiliary bars arranged in the horizontal direction are provided. The building foundation construction method according to claim 1, wherein the reinforcing bar is visible in a cross-sectional shape in front view at the opening portion.   In the opening part where the ventilation hole and / or the ventilation hole are arranged, a reinforcing bar is further arranged in an X shape on the reinforcing bar arranged in the foundation concrete, and the X shape in front view is arranged at the opening part. The method for constructing a building foundation according to claim 1, wherein the reinforcing steel bars can be visually observed.   The building foundation construction method according to any one of claims 2 to 4, wherein a hot-dip galvanizing treatment is applied to the reinforcing bars disposed in the ventilation hole and / or the ventilation hole. .   A vent hole provided in the partition wall is formed of a mold that forms the vent hole and a support metal that supports the mold, and the support metal is embedded in the partition wall after placing the concrete, and serves to reinforce the partition wall. The building foundation construction method according to claim 1, wherein the building foundation construction method is performed.   The construction base construction method according to claim 6, wherein an upper end of the support hardware is fixed to a reinforcing sub-bar stretched over an adjacent stirrup.   The mold for forming a vent or a vent used in the construction method of a building foundation according to claim 2 comprises a substantially cylindrical void pipe, and the void pipe has streaks in the vertical diameter direction. A vent or vent mold characterized by being arranged.   A mold for forming a vent or a vent used in the building foundation construction method according to any one of claims 2 to 5 is a substantially cylindrical mold, and the mold is in its longitudinal direction. The front mold member and the rear mold member can be assembled to each other so that they can be connected to and detached from each other. Ventilation hole or ventilation hole characterized in that a cutout portion is provided, or a cutout portion in which reinforcing bars are arranged in a cross shape or X shape in two diametrical directions so as to intersect is provided Type. In the vent or vent mold according to claim 9,
The inner diameter of the front mold member is expanded from the connecting edge toward the opening front edge, and the inner diameter of the rear mold member is substantially the same, or is expanded from the connecting edge toward the opening rear edge. A vent or vent hole type characterized by The vent opening mold according to claim 9,
A vent hole mold, wherein a lower portion of a front opening portion of the front mold member is formed in an outwardly expanded state.   The support hardware used in the construction method of the building foundation according to claim 6 includes a pair of left and right symmetrical support frames, and can hold the substantially cylindrical mold at a substantially central portion thereof. A support hardware, wherein the upper end and the lower end of a pair of support frames are fixed to each other, and are fixed to horizontal auxiliary bars arranged on the foundation concrete.   The mold for ventilator according to claim 8, further comprising an expansion part forming mold for forming the lower part of the opening located on the outside of the building of the mold in an expanded state on the outside. Ventilation vent type characterized by In the construction method of the building foundation of any one of Claims 1 thru | or 7,
A construction method for a building foundation, wherein reinforcing bars are further arranged in the periphery of a portion where a ventilation hole or a ventilation hole is formed. In the construction method of the building according to any one of claims 1 to 7 or 14,
A construction method for a building foundation, characterized in that a ventable lid for preventing the invasion of pests, moths and pests is provided in the outer opening of the ventilation port or the intermediate part where the reinforcing bars are arranged.