JP2000248681A - Earthen floor structure and earthen floor constructing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthen floor structure which minimizes heat loss from an earthen floor to an under floor foundation, and has excellent floor surface strength with respect to a load vertically applied thereto, and to provide a method for constructing the earthen floor. SOLUTION: In this earthen floor structure, an earthen floor 12 is formed together with external continuous footings 3 in one body, and under floor foundations 5, 7 are formed via a heat insulating member 9 arranged beneath the entire area of the earthen floor portion. Reinforcing bars 5b, 7b in the under floor foundations penetrate the heat insulating member, to thereby be connected to a reinforcing bar 12a in the earthen floor. According to the earthen floor constructing method, after placing and forming the external continuous footings and the under ground foundations, the upper surface of a gravel layer 8 on a back-filled ground surface is rendered flush with the upper edges of the under floor foundations, and the heat insulating member is laid over the gravel layer and the under ground foundations such that the reinforcing bars of the under floor foundations protrude from the upper surface of the heat insulating member. Further, the earthen floor reinforcing bar is connected to and combined with the reinforcing bars of the under floor foundations, and they are driven. As a result, the earthen floor 12 which is formed together with the external continuous footings 3 in one body and has its reinforcing bar 12a connected to the reinforcing bars 5b, 7b of the respective under floor foundations 5, 7 can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete floor structure and a method for constructing a floor in a building.

[0002]

2. Description of the Related Art When a concrete underfloor foundation such as an independent foundation or a pit-forming foundation is formed below a concrete floor, the upper end of the underfloor foundation is in direct contact with and supports the floor. Some have a structure. In this structure, there is a phenomenon in which the heat of the slab floor escapes to the underfloor foundation side such as the independent foundation section and the pit formation foundation section, and this phenomenon, that is, the heat loss, occurs in the slab floor section and in the building. This means that indoor heat is lost, and energy is wasted. Also, from the viewpoint of geothermal utilization, even if a structure in which soil is back-filled around the underfloor foundation inside the outer fabric foundation or a structure in which heat insulating material is laid, because of the aforementioned structure, There was a defect that the temperature difference from the underfloor foundation directly affected the soil floor. Further, in the former structure in which the soil is back-filled around the underfloor foundation, the soil floor absorbs moisture in the soil, and the indoor environment is deteriorated. In this way, it is a slab floor structure that can not escape heat loss, but on the other hand, because the underfloor foundation directly supports the slab floor, it is finished in a slab floor structure with high floor surface strength against vertical load ing.

[0003]

The first problem to be solved is that the heat loss from the slab floor to the underfloor foundation is minimized and that the integrated type with respect to the vertical load. Soil floor structure with floor strength equivalent to that of
The second is a soil floor structure in which there is no leakage of moisture around the reinforcing bar connecting the underfloor foundation and the floor, and thirdly, the influence of the temperature difference between the underfloor foundation and the soil surface under the floor. The earth floor structure, which is capable of utilizing geothermal energy with less heat and moisture and transmitting less heat and moisture from the outer fabric base to the soil floor, and having less heat loss from the soil floor to the outer fabric base,
Another object of the present invention is to provide a construction method capable of efficiently constructing the above-described floor structure.

[0004]

According to the present invention, in order to achieve the above-mentioned object, in a soil floor structure, a concrete soil floor portion is formed in a uniform shape over a concrete outer fabric base portion. A heat insulating member is disposed on the entire lower surface of the soil-producing floor, and a concrete underfloor foundation portion below the soil floor is formed through the heat-insulating member. It is characterized by being interconnected with a reinforcing bar on the floor. Further, in the earth floor structure of the present invention, a protruding portion of the reinforcing bar on the underfloor foundation side on the upper surface of the heat insulating member is closed. Further, in the floor structure of the present invention, the upper end of the concrete underfloor foundation on the lower surface of the heat insulating member and the upper surface of the rolled gravel layer on the soil are flush, and the concrete upper end of the underfloor foundation and the gravel layer While the concrete floor is supported by the upper surface via the heat insulating member,
The outer peripheral surface of the outer fabric base is surrounded by a heat insulating material. Then, in the soil floor construction method of the present invention, after the outer fabric base portion and the underfloor foundation portion whose height is lower than the outer fabric base portion by the heat insulating member are formed by concrete casting, the soil is placed inside the outer fabric base portion. Backfilled, laying on the backfilled soil surface and arranging the rolled gravel layer upper surface to be flush with the upper end of the underfloor foundation, and then applying the heat insulating member over the gravel layer and the underfloor foundation. The reinforcing bar on the underfloor foundation side is laid out from the upper surface of the heat insulating member, and the soil reinforcing bar is connected to the reinforcing bar on the underfloor foundation portion on the insulating member, and concrete is poured into the outer member. It is characterized in that it forms an intersoil floor portion which is the same shape as the cloth base portion and in which the underfloor base portion side and the rebar are connected to each other.

The concrete underfloor foundation in the present invention is various foundations formed under the floor such as a pit forming foundation, a middle cloth foundation such as a buttress, and an independent foundation, and is independent of the independent foundation. The pit is called a pit with a lid, a drainage pit, a wiring pit, a piping pit, or the like provided on a dirt floor. The connection between the reinforcing bars on the underfloor foundation side and the soil floor part side is based on the pit formation foundation, buttress,
It may be performed in a part of the independent foundation or the like, or may be performed in all. Further, the specific connection form may be any of a state of being welded and joined, a state of being bound by a binding wire, and any other connection means. The heat insulating member is of a known type including a foamed polyethylene foam such as an XPS plate (manufactured by Kanegabuti Chemical Industry Co., Ltd.), a foamed polystyrene foam, and other foamed resin plates having a compressive strength of 10 t / 1 m 2 or more. The relationship between the heat-insulating member and the reinforcing bar of the underfloor foundation is based on the use of a heat-insulating member having a hole through which the reinforcing bar passes in advance so that concrete for forming a floor between soils does not enter from the portion of the reinforcing bar in the heat-insulating member. The penetrating hole is closed with a lid, or a gap generated around the base of the reinforcing bar in the heat insulating member at the time of penetrating is closed with a filler so that the concrete floor does not connect the soil floor and the underfloor foundation. Further, the gap between the heat insulating members and / or the gap between the outer fabric base and the heat insulating member,
By attaching a waterproof tape or laying a waterproof sheet over the gap, it may be closed while leaving a heat insulating space as a gap. In this case, the work of laying the heat-insulating members can be easily completed because the gap between the members can be roughly set to a certain extent, and the concrete is prevented from flowing into the gaps at the time of placing the soil floor, It is possible to prevent the heat loss and the propagation of moisture, in which concrete becomes a medium, and to secure a heat insulating space. In particular, a type to which a waterproof tape is attached is effective not only for speeding up the operation but also for reducing the material cost and the operation cost. Further, the gap may be filled with urethane resin or other known filler to close the gap itself, or the heat insulating members may be glued together, or the inner surface of the outer cloth base and the heat insulating member may be glued together. As shown in the above, there may be an adjacent relationship in which there is no gap in a contact state. Furthermore, a vinyl chloride resin sheet, a polyethylene resin sheet, or another known moisture-proof sheet may be laid below the heat insulating member to prevent moisture from entering from below. In the construction method, when laying the gravel layer, the backfill soil surface may be compacted.

[0006]

1 and 2 show an embodiment of a soil floor structure according to the present invention, in which a concrete outer cloth base portion is placed on a compacted gravel layer 2 on a ground 1. FIG. 3, a concrete independent foundation 5 is formed on the compacted gravel layer 4, and a concrete pit formation foundation 7 is formed on the compacted gravel layer 6, respectively. The heights of the upper ends of the independent base portion 5 and the pit forming base portion 7 are formed lower than the upper end of the outer fabric base portion 3 by the thickness of the heat insulating member 9. The soil surface inside the outer cloth foundation 3
A gravel layer 8 is rolled and laid on 1a, and the upper surface of the gravel layer 8 and the upper end of the independent foundation 5 and the upper end of the pit forming foundation 7 are arranged in the same plane.

The upper surface 8a of the gravel layer 8 arranged in the same plane
A heat insulating member 9 is provided and laid between the upper end portion 5a of the independent base portion 5 and the upper end portion 7a of the pit forming base portion 7. The heat insulating member 9 is constituted by a plurality of XPS plates having a high pressure resistance. The upper surface of the heat insulating member 9 is vertically arranged from the concrete upper ends 5a and 7a of the independent foundation 5 and the pit forming foundation 7 respectively. The independent foundation reinforcing bar 5b and the pit forming foundation reinforcing bar 7b projecting through the heat insulating member 9, and these independent foundation reinforcing bars 5b and the pit forming foundation reinforcing bar 7b The floor 12 is interconnected with the floor reinforcing steel 12a. Further, a waterproof tape 10 is attached on the space between the adjacent edges of each heat insulating member 9 and on the adjacent portion between the heat insulating member 9 and the outer cloth base 3 so as to straddle the gap a between them. The heat-insulating space portion 11 is formed by the waterproof tape 10 and has a gap a separated from the soil floor portion 12 side.

[0008] A concrete interstitial floor portion 12 is formed by being driven over the upper end of the outer fabric base portion 3 and the upper surface of the heat insulating member 9. The slab floor 12 is connected to and integrated with the outer fabric base 3 and the concrete and the reinforcing bars 3a and 12a, and is connected to the independent base 5 and the pit forming base 7 separated by the heat insulating member 9, respectively. Through the independent reinforcing bar 5b and the pit forming reinforcing bar 7b. Further, an outer heat insulating member 13 is provided along the outer periphery of the outer fabric base portion 3 and the interstitial floor portion 12 so as to be adjacent to each other to prevent moisture from entering the inside of the outer fabric base portion 3 and from the inside. The heat loss to the outside and the cold from the inside to the outside can be cut. A preservative base 14 is laid on the outer fabric base 3 and fixed with anchor bolts 15, and a pillar 16 is erected on the preservative base 14 to construct a building.

Next, an embodiment of the method for constructing a floor of the present invention will be described in the case of the above-mentioned floor structure. First stage (see FIG. 3) The outer fabric foundation reinforcing bar 3a is assembled on the gravel layer 2 which is laid and rolled after digging for the outer fabric foundation, and the outer heat insulating member 13 is provided on the inner peripheral surface.
An outer fabric base space is formed by the outer mold frame 18 and the inner mold frame 19 which are detachably fastened. Similarly, on the gravel layers 4 and 6 which were laid and rolled after being dug out for the independent foundation portion and the pit formation foundation portion, respectively, the dirt floor reinforcing portion 12a of the dirt floor portion 12 to be formed in the subsequent process and The independent foundation rebar 5b and the pit formation foundation rebar 7b having connectable heights are assembled, and the mold 20 forms an independent foundation space and a pit formation foundation space, respectively. Next, concrete is poured into the outer cloth foundation space, the independent foundation space, and the pit formation foundation space. In the independent foundation space and the pit formation foundation space, concrete is cast lower than the outer fabric foundation space by the thickness of the heat insulating member 9.

Second stage (see FIG. 4) After curing, each mold except the outer mold 18 in the outer fabric base 3
By removing 19 and 20, the outer fabric base 3, the independent base 5, and the pit forming base 7 whose outer peripheral surfaces are surrounded by the outer heat insulating member 13 are formed. Thereafter, the soil is backfilled inside the outer fabric base portion 3 except inside the pit forming base portion 7, gravel is laid on the backfilled soil surface 1a and compacted, and the upper surface portion 8a of the gravel layer 8 is Upper end 5a of independent foundation 5 and upper end of pit formation foundation 7
7a is arranged on the same plane.

Third stage (see FIG. 5) The upper surface portion 8a of the gravel layer 8 and the upper end portion 5a of the independent foundation portion 5 and the upper end of the pit forming foundation portion 7 arranged on the same surface inside the outer fabric base portion 3 At the position of the independent foundation 5 and the pit forming foundation 7, the heat insulating member 9 is spread over the portion 7 a, and the rebar 5 b for the independent foundation and the reinforcing steel 7 b for the pit forming foundation are pressed from above so as to protrude toward the upper surface side of the heat insulating member 9. And arrange them. At this time, in the case where a gap space is generated at the protruding base portion of the independent foundation rebar 5b and the pit formation foundation rebar 7b in the heat insulating member 9, a filler is injected into the gap space to close the gap, and the next fourth step is performed. To prevent intrusion of concrete for slab floors constructed at The gap a between adjacent edges of each heat insulating member 9 and the gap a between the inner surface of the outer cloth base 3 and the heat insulating member 9 are set so as to straddle the respective gaps a.
Is adhered and closed to form a heat insulating space 11 consisting of a gap a, and to prevent the concrete for the slab floor to be constructed in the next fourth step from entering the heat insulating space 11. Is secured.

Fourth stage (see FIG. 6) A state in which the reinforcing bar 12a for the slab is assembled on the heat insulating member 9 and connected to the reinforcing bar 3a for the outer fabric, the reinforcing bar 5b for the independent foundation, and the reinforcing bar 7b for the pit formation. Combine with.

Fifth step (see FIG. 7) Concrete is cast on the heat insulating member 9 surrounded by the external heat insulating member 13 and cured, and the reinforcing steel and concrete are the same as the outer cloth base portion 3. Only the reinforcing bars of the independent foundation portion 5 and the pit formation foundation portion 7 form the same intersoil floor portion 12. After this, the outer frame 18 is removed, and the outer heat insulating member 13 is exposed on the outer periphery of the outer fabric base 3. Thereby, construction can be performed efficiently. In the above-described construction method, the outer formwork 18 may be constructed without being detached. Further, a construction method in which the outer heat insulating member 13 also serves as the outer formwork 18 may be employed.

FIG. 8 exemplifies another embodiment of the earth floor structure of the present invention. Since the structure is basically the same as that of the embodiment of FIG. 1, the common structure is used. Will be omitted with reference to the reference numerals, and different configurations will be described. In the embodiment of (A), the recess 9a is formed in each portion of the lower surface of the heat insulating member 9 through which the independent reinforcing bar 5b and the pit forming basic reinforcing bar 7b penetrate, and the independent reinforcing bar 5b is formed through the recess 9a. And the pit formation foundation reinforcing bar 7b makes it easy to penetrate the heat insulating member 9. The recess 9a also serves as the heat insulating space 11. In the embodiment of (B), through holes 9b are formed in the respective portions of the lower surface of the heat insulating member 9 through which the independent foundation reinforcing bar 5b and the pit forming foundation reinforcing bar 7b penetrate, and the through holes 9b are connected to the independent foundation reinforcing bar 5b. And the pit formation base reinforcing bar 7b is penetrated, and the through hole 9b after the penetration is filled with a filler 17 such as a foamed resin and closed, and the independent foundation reinforcing bar is placed on the filler 17.
5b and the pit formation basic reinforcing bar 7b are projected. The size of the recess 9a and the through hole 9b is
A mode in which one reinforcing bar passes or a mode in which a plurality of reinforcing bars can pass simultaneously may be used.

[0015]

A. Effects of the Invention According to the first aspect, the heat loss from the slab floor to the underfloor foundation is limited to only the reinforcing bar and is minimized, and the slab floor and the underfloor foundation are integrated via the rebar. It has a floor strength equivalent to that of the integrated type against vertical loads. Thereby, it is useful as a slab where heat loss and the indoor environment are not deteriorated, and wasteful consumption of energy can be minimized. Has floor strength. B. According to the second aspect, since there is no leakage of moisture around the reinforcing bar connecting the underfloor foundation portion and the slab floor portion, the slab floor portion is stable in temperature, and a heat storage effect and a heat dissipation effect are obtained. C. According to the third aspect, it is possible to effectively utilize the geothermal heat because the influence of the temperature difference between the underfloor foundation portion and the soil surface under the interstitial floor portion is small, and the degree of transmission of cold and moisture from the outer fabric base portion to the interstitial floor portion is small, In addition, the heat loss to the outer fabric base is smaller than the soil floor. D. According to the fourth aspect, it is possible to connect the reinforcing steel for the slab floor to the reinforcing steel for the independent foundation and the pit forming reinforcing steel on the stable foundation, that is, the heat insulating member, and to assemble the concrete. It can be constructed efficiently. In the constructed slab floor structure, the heat loss from the slab floor to the underfloor foundation is limited to only the reinforcing bars and is minimized, and the slab floor and the underfloor foundation are integrated through this reinforcing bar. As a result, it has a floor strength equivalent to that of the integrated type against vertical loads.
As a result, it is useful as a clay floor for a building for cold regions, and wasteful consumption of energy can be minimized. In addition, moisture is not blocked by the heat insulating member and does not reach the floor of the earth, so that the indoor environment does not deteriorate. In addition, since the influence of the temperature difference between the underfloor foundation and the soil surface under the floor between the soils is small, geothermal can be effectively utilized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view illustrating one embodiment of a soil floor structure of the present invention.

FIG. 2 is a cross-sectional plan view of FIG. 1 (2)-(2).

FIG. 3 is a partial vertical sectional view of a first stage illustrating an embodiment of the slab floor construction method of the present invention.

FIG. 4 is a partial longitudinal sectional view of a second stage.

FIG. 5 is a partial longitudinal sectional view of a third stage.

FIG. 6 is a partial longitudinal sectional view of a fourth stage.

FIG. 7 is a partial longitudinal sectional view of a fifth stage.

FIGS. 8A and 8B are partially enlarged cross-sectional views illustrating another embodiment of the soil floor structure of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground 1a Soil surface 2,4,6,8 Gravel layer 3 Outer fabric foundation 5 Independent foundation 5a Top end of independent foundation 5b Reinforcing bar for independent foundation 7 Pit formation foundation 7a Top end of pit formation foundation 7b Pit Reinforcing foundation 8 Gravel layer 8a Upper surface of gravel layer 9 Insulating member 9a Concave portion of insulating member 9b Through hole of insulating member 10 Waterproof tape 11 Insulating space 12 Soil floor 12a Reinforcing floor for soil floor 13 External insulating member 14 Preservative base 15 Anchor bolt 16 Column 17 Filler 18 Outer form 19 Inner form 20 Form a

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[Procedure amendment]

[Submission date] December 20, 1999 (1999.12.
20)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

According to the present invention, in order to achieve the above-mentioned object, in a soil floor structure, a concrete soil floor portion is formed in a uniform shape over a concrete outer fabric base portion. A heat insulating member is disposed on the entire lower surface of the soil-producing floor, and a concrete underfloor foundation portion below the soil floor is formed through the heat-insulating member. It is characterized by being interconnected with a reinforcing bar on the floor. Further, in the earth floor structure according to the present invention, the base from which the reinforcing bar on the upper side of the underfloor portion on the upper surface of the heat insulating member protrudes is closed by a filler . Further, in the floor structure of the present invention, the upper end of the concrete underfloor foundation on the lower surface of the heat insulating member and the upper surface of the rolled gravel layer on the soil are flush, and the concrete upper end of the underfloor foundation and the gravel layer The concrete floor is supported by the upper surface via the heat insulating member, and the outer peripheral surface of the outer fabric base is surrounded by a heat insulating material. Then, in the soil floor construction method of the present invention, after the outer fabric base portion and the underfloor foundation portion whose height is lower than the outer fabric base portion by the heat insulating member are formed by concrete casting, the soil is placed inside the outer fabric base portion. Backfilled, laying on the backfilled soil surface and arranging the rolled gravel layer upper surface to be flush with the upper end of the underfloor foundation, and then applying the heat insulating member over the gravel layer and the underfloor foundation. The reinforcing bar on the underfloor foundation side is laid out from the upper surface of the heat insulating member, and the soil reinforcing bar is connected to the reinforcing bar on the underfloor foundation portion on the insulating member, and concrete is poured into the outer member. It is characterized in that it forms an intersoil floor portion which is the same shape as the cloth base portion and in which the underfloor base portion side and the rebar are connected to each other.

Claims (4)

[Claims] A concrete soil floor is formed in the same shape over a concrete outer fabric base, and a heat insulating member is disposed on the entire lower surface of the concrete soil floor. A slab floor structure, wherein a concrete slab under the floor is formed, and a reinforcing bar in the understory base penetrates the heat insulating member and is interconnected with a reinforcing bar of the slab floor. 2. The slab floor structure according to claim 1, wherein a protruding portion of the reinforcing bar on the underfloor base portion side on the upper surface of the heat insulating member is closed. 3. The upper end of the concrete underfloor foundation on the lower surface of the heat insulating member and the upper surface of the pressed gravel layer on the soil are flush with each other. The concrete floor structure according to claim 1 or 2, wherein the concrete floor space is supported via the member, and the outer peripheral surface of the outer fabric base is surrounded by a heat insulating material. 4. After forming an outer fabric base portion and an underfloor base portion having a height lower than that of the outer fabric base portion by the amount of the heat insulating member by casting concrete, the soil is back-filled inside the outer fabric base portion, and this filling is performed. The upper surface of the gravel layer laid and rolled on the return soil surface is arranged to be flush with the upper end of the underfloor foundation, and thereafter, the heat insulating member is placed under the floor from the upper surface of the heat insulating member over the gravel layer and the underfloor foundation. The reinforcing bar on the base portion side is laid in a protruding manner, and on the heat insulating member, the soil reinforcing bar is connected to the reinforcing bar on the underfloor base portion side and assembled, and is poured into concrete to be the same as the outer cloth base portion. A method of constructing a slab floor, wherein the slab floor section is formed in such a manner that the underfloor foundation side and the rebar are connected to each other.