JP2006348470A - Building foundation and construction method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building foundation and a construction method therefor, which enable the effective utilization of heat accumulated in ground, which shorten a construction period, and which reduce construction costs. <P>SOLUTION: In the construction method for the building foundation, a vertical reinforcing member 11 is erected on foundation concrete 7; a sill 13 is height-adjustably mounted on the upper part of the member 11; forms 17 and 18 are separately erected on the foundation concrete 7 in both the side parts of the member 11; after that, stone 21 is spread all over a building-floor constructing section 16 which is surrounded by the forms 17 and 18; and subsequently, the concrete is placed between the forms 17 and 18 and in the section 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a building foundation and a building foundation method capable of utilizing underground heat storage.

In general, since the underground has less temperature change than the outside air, it is relatively warm in winter and cool in summer. This phenomenon has been widely known for a long time and has already been used in many fields. Snow extinguishing and cooling facilities using groundwater are well known. In the field of architecture, various attempts have been made to effectively use the heat stored in the ground. For example, stones are laid in a floor construction position surrounded by a concrete cloth foundation, a foundation is constructed on the cloth foundation, and then an upper edge is defined between the opposing foundations at the floor construction position. A leveling jig formed so as to have a height is installed, and then the base concrete is placed along the upper edge of the leveling jig at the floor construction position, and after the base concrete is solidified, the base concrete There is a method for constructing a floor using underground heat storage, characterized in that a floor finishing member is laid on the upper surface of the material through a base plate if necessary (see, for example, Patent Document 1). The floor by this construction method is thermally continuous with the underground, so there are regional differences, but the stone layer generally maintains a maximum temperature of 24 ° C (summer) to a minimum of 12 ° C (winter). It is transmitted directly to the floor finish and is kept at 25 ° C or lower in summer and 10 ° C or higher in winter.
Japanese Patent Laid-Open No. 10-273948

  However, in the building floor construction method according to the above-mentioned patent document, there are many floor construction processes, which have problems in terms of construction period and cost. For example, even if only concrete placement is taken, a total of three times of placement of base concrete, rising concrete, and soil slab concrete are required. When the number of times of placing concrete increases, not only the cost increases, but also the curing period becomes longer, and the total construction period becomes longer.

  The present invention has been made in view of the above circumstances, and is a building foundation and a building foundation method capable of effectively using heat accumulated in the ground, and has a short construction period and a low construction cost. The purpose is to provide the building foundation method.

The invention according to claim 1 has a vertical reinforcing member erected on the foundation concrete, the rising foundation placed between molds erected apart from both sides of the vertical reinforcing member, and In the building foundation consisting of crushed stone as a heat storage layer on the building floor construction part inside the rising foundation, the inner formwork in contact with the heat storage layer is not required to be removed, and the base and the outside The formwork is fixed and the foundation of the rising foundation and the slab concrete can be placed once, the height can be adjusted at the upper part of the vertical reinforcing member, the foundation is provided, and the upper surface of the soil slab is aligned with the upper surface of the foundation It is characterized by finishing horizontally and uniformly .

  According to a second aspect of the present invention, in the building foundation according to the first aspect, the vertical reinforcing member comprises a lattice unit.

  According to a third aspect of the present invention, in the building foundation according to the first aspect, the base is made of wood or steel.

  According to a fourth aspect of the present invention, in the building foundation according to the first aspect, the mold is made of a heat insulating material.

  According to the fifth aspect of the present invention, a vertical reinforcing member is erected on the foundation concrete, and a base is attached to the upper portion of the vertical reinforcing member so that the height thereof can be adjusted, and the foundation concrete is formed on both sides of the vertical reinforcing member. It is a building foundation construction method characterized in that concrete is placed between the molds and on the building floor construction part after the molds are spaced apart.

  According to the sixth aspect of the present invention, a vertical reinforcing member is erected on the foundation concrete, and a base is attached to the upper portion of the vertical reinforcing member so that the height thereof can be adjusted. After standing apart from the formwork, the building floor construction part surrounded by the formwork is spread with stones, and then concrete is placed between the formwork and the building floor construction part. It is a building foundation method.

  According to the building foundation described in claim 1, since the height of the foundation can be adjusted at the upper part of the vertical reinforcing member, the level of the foundation can be easily adjusted.

  According to the building foundation described in claim 2, since the standard lattice unit can be used, the construction period of the building foundation can be shortened and the construction cost can be reduced.

  According to the building foundation of the third aspect, the foundation is made of wood or steel, and can be flush with the soil slab, so that the construction of the building including the floor is simplified.

  According to the building foundation of Claim 4, since a formwork is comprised from a heat insulating material, the heat stored in the ground can be used effectively.

  According to the building foundation method of claim 5, the top surface of the foundation of the building foundation can be adjusted to a uniform level and the number of times of placing concrete can be reduced, so that the construction period can be shortened. The construction cost can also be reduced.

  According to the building foundation method of claim 6, in addition to the effect of the building foundation method of claim 5, it is possible to realize a building foundation that can make more effective use of underground heat storage.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an embodiment of a building foundation 1 according to the present invention. This example represents a building foundation 1 of a detached house. Although the building foundation 1 of a detached house differs depending on the floor plan, it is roughly divided into an outer peripheral foundation 2 that is an outer edge of the building and an inner foundation 3 that is disposed at a portion corresponding to a partition. In addition, reinforcing bars 4 are arranged on the outer periphery base 2 and the long internal base 3 in the building foundation 1 to improve the strength.

  First, the outer peripheral part foundation | substrate 2 used as the outer edge of a building is demonstrated. FIG. 2 is a longitudinal sectional view of the outer periphery base 2 showing an embodiment of the present invention, and specifically shows an AA arrow view in FIG. In the figure, the site which is the foundation of the building site is excavated by several tens of centimeters, and the leveling and ground improvement work for arranging gravel 5 is performed. And after arrange | positioning the reinforcing bar 6, the foundation concrete 7 is laid. The structure and construction method of the foundation concrete 7 can be performed in the same manner as a conventional construction method. However, the upper surface of the foundation concrete 7 is not only formed flat, but the reinforcing bars 9 are arranged to protrude from the upper surface at predetermined intervals in a portion that becomes the rising foundation 8.

  After the cast foundation concrete 7 is solidified, a lattice unit 11 that is a longitudinal reinforcing member is fixed to a reinforcing bar 9 protruding from the upper surface of the foundation concrete 7. This fixing method may be performed by welding or may be bound by a binding wire. In order to facilitate this fixing operation, a concrete spacer block 12 is placed on the foundation concrete 7, and the lattice unit 11 is placed thereon. The frame of the lattice unit 11 is made of equilateral angle steel, and the upper side 11a is provided with a plurality of screw holes 11b at predetermined intervals. A base mounting tool 14 having all screw rods is attached to each screw hole 11b. The base mounting tool 14 has a flat plate fixed to one end of all screw rods, and a base 13 made of wood or steel having a rectangular cross section is placed on the flat plate. All screw rods of the base mounting tool 14 are screwed into the screw holes 11b of the lattice unit 11, and the height can be adjusted by rotating the base mounting tool 14 as necessary. After the height adjustment, the base mounting tool 14 is fixed by the nut 15. The height of the base 13 is finally adjusted by using a commercially available level meter.

  On the foundation concrete 7 on both sides of the longitudinal reinforcing member 11, the molds 17 and 18 are erected with a gap corresponding to the thickness of the rising foundation 8. The standing method of the molds 17 and 18 can be performed by a conventional method. That is, it can be performed using the mold separator 19.

  A material having excellent heat insulation is used for the molds 17 and 18. Specifically, rigid urethane foam is used. However, of the two inner and outer molds 17 and 18 for constructing the outer peripheral foundation 2, the mold 17 that is inside the rising foundation 8 is embedded in the earth and sand without being removed. It is not necessary to use an excellent material, and a formwork made of a normal concrete plate can also be used.

  A base fixture 20 is attached to the side surface of the base 13 and the side surface of the mold 18 that is outside the rising foundation 8, and the base 13 is fixed to the mold 18. As a result, the position of the base 13 can be maintained by withstanding the pressure applied by the concrete even when placing the concrete. The base fixture 20 can be removed after the concrete has solidified.

  The building floor construction part 16 which is the inside of the rising foundation 8 is backfilled with earth and sand up to a predetermined height, and a crushed stone 21 of about 200 mm in thickness is spread on the upper part. The crushed stone 21 constitutes a heat storage layer, and is spread over the entire surface under the floor with a uniform thickness. In addition, since recycled crushed stone can be used for the crushed stone 21, it becomes possible to aim at effective utilization of building material resources.

  The intersoil slab 22 is provided with interstitial reinforcing bars 23 corresponding to the required floor strength. In the case of floor heating specifications, a floor heating pipe 24 is provided as appropriate. Of the two inner and outer molds 17 and 18 for constructing the outer periphery base 2, the height of the mold 17 that is inside the rising foundation 8 is lower than the height of the mold 18 that is outside. The concrete of the rising foundation 8 and the concrete of the soil slab 22 are made to be continuous at the connecting corner. As a result, the height of the base 13 can be easily adjusted, and the concrete of the rising base 8 parts and the soil slab 22 parts can be placed once.

  For concrete placement, after confirming that the height of each part of the foundation 13 is uniform using a commercially available level meter, the building that will be between the formwork 17 and 18 and the soil slab 22 that will be 8 parts of the rising foundation The floor construction section 16 is set up once. Prior to the concrete placement of the soil slab 22, a polyethylene film 25 is laid on the upper surface of the crushed stone 21 serving as a heat storage layer. As a result, it is possible to provide continuity in heat transfer performance while physically separating the crushed stone 21 and the concrete of the soil slab 22.

  Further, when placing concrete, a leveling plate (not shown) is bridged between the bases 13 and 13, and the concrete surface which is the upper surface of the soil slab 22 is leveled horizontally. Prior to placing concrete, the horizontal level of the top surface of the foundation 13 is adjusted to be uniform, so the leveling surface of the soil slab 22 can be leveled evenly by carrying out a leveling work by placing a leveling plate between the opposing foundations 13 and 13. Can be finished.

  Next, the internal foundation 3 arrange | positioned in the site | part corresponded to the partition of a building is demonstrated. FIG. 3 is a longitudinal sectional view of the internal foundation 3 showing an embodiment of the present invention, and specifically shows a view taken along arrow BB in FIG. The basic structure of the internal base 3 is the same as that of the outer peripheral base 2 shown in FIG. The difference is that the heights of the molds 17 and 18 arranged on both sides of the rising base 8 are equal, and the cross-sectional shape of the base 13 is small. In other respects, the configuration and construction method are the same as those of the outer peripheral base 2. Therefore, the description about the part which is common with the outer peripheral part base 2 is abbreviate | omitted, and only a different part is demonstrated.

  Since both sides of the internal foundation 3 are backfilled with earth and sand and crushed stone 21, the height dimensions of the molds 17 and 18 on both sides are made equal. In such a case, if the cross-sectional dimension of the base 13 fixed to the upper part of the rising foundation 8 is large, it becomes an obstacle to the reinforcement work of the soil slab 22 and the piping work for floor heating, and the concrete to the rising foundation 8 part Since placement becomes difficult, the cross-sectional dimension of the base 13 is made smaller than that of the base 13 provided on the outer peripheral base 8 shown in FIG. As a result, the rebar 23 of the soil slab 22 and the floor heating pipe 24 can be passed through the lower portion of the base 13 without bending. On the other hand, if the cross-sectional dimension of the base 13 is reduced, there may be a problem in the strength of the base 13.

  As for the inner foundation 3, as in the same manner as the outer peripheral foundation 2, the connecting corner between the rising foundation 8 and the soil slab 22 is formed obliquely to provide a large concrete path. The strength of the connecting part is increased and the flow of the concrete is improved to facilitate the work when placing the concrete.

  FIG. 4 is a front view of the lattice unit 11 according to the embodiment of the present invention. The lattice unit 11 is developed for the purpose of reducing the manufacturing cost and the construction cost. The lattice unit 11 is composed of members 11a, 11e, and 11f made of one lattice reinforcing bar 11c, two left and right end plates 11d, and three equilateral angle irons. The members are joined together by welding. The left and right end plates 11d are provided with a plurality of bolt insertion holes 11g for connecting to adjacent members. The equilateral angle steel 11f disposed between the equilateral angle irons of the upper side 11a and the lower side 11e is used for fixing the position of the formwork separator 19. The lattice unit 11 having such a configuration, for example, is only about 40 kg in weight even if the vertical and horizontal dimensions are 0.5 m × 4.0 m. Can be installed. Therefore, the work efficiency of the construction work is improved and the construction can be performed in a short time, so that the construction time can be shortened and the construction cost can be reduced. Further, the lattice unit 11 is unitized, and the same product can be mass-produced, so that the manufacturing cost of the lattice unit 11 itself can be reduced.

  As mentioned above, although this invention was demonstrated based on the Example, this invention can carry out various deformation | transformation implementation. For example, in the above embodiment, as the height adjusting means of the base 13, the entire screw bolt of the base mounting tool 14 is screwed into the screw hole 11b provided in the flat plate portion of the equilateral angle steel 11a which is the upper member of the lattice unit 11. The nut 15 is fixed, but a hole is provided in the flat plate portion of the equilateral angle steel 11a, and the two screw nuts of the base mounting tool 14 are inserted into the hole from both sides of the flat plate portion. The bolt can be tightened with 15 and fixed. In addition, although the embodiment using the equilateral mountain shape steel as the constituent member of the lattice unit 11 has been described, the constituent member may use an unequal side angle steel instead of the equilateral angle steel.

It is a top view of the building foundation which shows the Example of this invention. It is a longitudinal cross-sectional view of the outer periphery base which shows the Example of this invention, and shows the AA arrow of FIG. It is a longitudinal cross-sectional view of the internal foundation which shows the Example of this invention, and shows the BB arrow of FIG. It is a front view of the lattice unit which concerns on the Example of this invention.

Explanation of symbols

1 Building foundation 7 Foundation concrete
8 Start-up basics
11 Vertical reinforcement member (lattice unit)
13 foundation
16 Building floor construction department
17,18 formwork
21 Heat storage layer (stone, crushed stone, recycled stone)
22 Doma slab

Claims (6)

A vertical reinforcing member erected on the foundation concrete, a base fixed to be adjustable in height at the upper part of the vertical reinforcing member, and erected on the basic concrete on both sides of the vertical reinforcing member. A building foundation comprising a formwork and made of concrete placed between the formwork and a building floor construction part. The building foundation according to claim 1, wherein the vertical reinforcing member is a lattice unit. The building foundation according to claim 1, wherein the base is made of wood or steel. The building foundation according to claim 1, wherein the formwork is made of a heat insulating material. A vertical reinforcing member is erected on the foundation concrete, and the base is attached to the upper part of the vertical reinforcing member so that the height can be adjusted, and the mold frame is erected on the foundation concrete on both sides of the vertical reinforcing member. After that, a building foundation construction method characterized by placing concrete between the molds and the building floor construction part. A vertical reinforcing member is erected on the foundation concrete, and the base is attached to the upper part of the vertical reinforcing member so that the height can be adjusted, and the mold frame is erected on the foundation concrete on both sides of the vertical reinforcing member. After that, a building foundation construction method is characterized in that stones are spread over the building floor construction part surrounded by the formwork, and then concrete is placed between the formwork and the building floor construction part.

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