JP2005232825A - Under-floor storage space - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose an under-floor storage space which is built at a lower cost and is sufficiently waterproofed. <P>SOLUTION: The under-floor storage space 10 is surrounded by a ground reinforcing body 11 and formed from under the floor of a house to the underground of the house. A first water barrier film 20 is arranged extending along an outer side surface of the ground reinforcing body 11, inwardly crossing the ground reinforcing body 11 at a specified height and extending along an inner side surface of the ground reinforcing body 11. A second water barrier film 30 is arranged extending along the inner side of the ground reinforcing body 11 and rising together with the first water barrier film 20 at a specified height. A third water barrier film 40 is arranged and comprises a crossing part 41 for covering the first water barrier film 20 across the ground reinforcing body 11 and a rise part 42 rising together with the second water barrier film 30 and covering an outer side surface of the first water barrier film 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an underfloor storage space formed from under the floor of a house to the basement, and particularly relates to an underfloor storage space that is low-cost and highly waterproof.

  In urban housing, the storage rate tends to be insufficient, so there is often a storage space that uses the back of the hut or the middle floor (the mezzanine floor or between the ceiling on the first floor and the floor on the second floor). . However, since the storage space using the back of the shed and the intermediate floor is located at the top of the house, it is particularly difficult to put in and take out heavy objects, and the stored items are destroyed or damaged in the event of a disaster such as a fire or earthquake. There is a disadvantage that it is easily damaged.

  On the other hand, since the basement is located in the lower part of the house, it is relatively easy to take in and out even heavy items, the stored items are not easily burned and damaged, and the storage environment such as temperature and humidity is stable. However, there is a drawback that the cost for ground excavation and building of the frame is high.

In this regard, the underfloor storage chamber disclosed in Patent Document 1 is designed to reduce the excavation volume as much as possible by devising the excavation shape, and can be constructed at a relatively low cost.
Registered Utility Model No. 3069441 (paragraphs 0004-0014, FIG. 3)

  However, the underfloor storage chamber disclosed in Patent Document 1 is still subjected to complicated processes such as bar arrangement, formwork placement, concrete placement, curing, formwork disassembly, backfilling, etc. There is a problem that costs and labor are increased, and there is a risk of water leakage due to insufficient waterproofing measures.

  The present invention has been made in view of such circumstances, and an object of the present invention is to propose an underfloor storage space that can be constructed at a low cost and is provided with sufficient waterproofing measures.

  That is, the invention according to claim 1 is an underfloor storage space that is surrounded by a ground reinforcement body and is formed from the bottom of the house to the basement, and has a predetermined height along the outer surface of the ground reinforcement. Crossing the ground reinforcement body inward, and further, a first water barrier film is disposed along the inner side surface of the ground reinforcement body, and the first reinforcement film at a predetermined height along the inner side surface of the ground reinforcement body. A second water barrier film is disposed so as to stand up together with the water barrier film, and a first portion that rises together with the cross section covering the upper surface of the first water barrier film crossing the ground reinforcing body and the second water barrier film. A third water shielding film comprising an upright portion covering the outer surface of the water shielding film is disposed.

  This underfloor storage space is a structure that resists earth pressure with a ground reinforcement body that surrounds the surrounding side, so it can be constructed at a significantly lower cost than conventional basements that resist earth pressure with a reinforced concrete frame. is there. Here, the “ground reinforcement” is a general term for those whose strength has been increased by modifying the ground itself. Specifically, the soil is replaced, consolidated, reinforced, etc. “Improved bodies” and “lapple concrete (crude stone concrete)” containing cobbles and crushed stones having a diameter larger than usual (about 150 mm).

In addition, a double waterproof treatment is applied to the first water shielding film on the outer side surface of the ground reinforcement body and the second water shielding film on the inner side surface, and the first water shielding film disposed on the outer side is provided. Since groundwater is blocked early and dropped downward, leakage into the underfloor storage space can be reliably prevented even when the surrounding ground contains a large amount of water due to heavy rain or the like. The second water barrier film is a waterproof / moisture-proof function that prevents moisture in the ground reinforcement body or water that has entered here from entering the storage space under the floor, and smells generated from the ground reinforcement body (especially cement odor). Deodorizing function that cuts off) and a curing function that prevents the ground strengthening body from drying so that the ground strengthening body can be cured in a wet state. The “water shielding film” is a general term for a thin film-like material that functions to block the passage of water, and examples thereof include a waterproof sheet and a water shielding film.
In addition, although the "foundation" in this invention needs to be a fabric foundation structurally, what is called a full base foundation which made the base part of such a fabric foundation continue is also included.

In addition, the first water barrier film is not raised as it is along the outer surface of the ground reinforcement body, but is crossed from the outside to the inside at a predetermined height, and further on the inner surface of the ground reinforcement body. If it is made to start with a 2nd water-impervious film along, it can avoid the complicated accommodation which a 1st water-impermeable film embeds in a foundation.
For this reason, the height at which the first water shielding film crosses the ground reinforcement body is preferably a relatively high position (for example, about 30 cm below the bottom surface of the foundation).
In addition, if the first water-blocking film is arranged in a shape that becomes narrower as it goes upward, the upper half must inevitably be partially cut off and stored, and water leaks from this cut-out part. Where there is a fear, the crossing of the third water barrier film along the upper surface of the cross section of the first water barrier film and the outer surface of the first water barrier film rising together with the second water barrier film respectively. By arrange | positioning a part and an upright part, the penetration | invasion of the water from the excision part of a 1st water-shielding film to a ground reinforcement body can be prevented reliably.
In addition, it is desirable that the crossing portion of the first water shielding film is formed so as to be gradually lowered from the inside toward the outside. Thereby, since water does not accumulate on the upper surface of the crossing part of the first water shielding film, the possibility of water entering the ground reinforcement body can be further reduced.

  According to a second aspect of the present invention, in the underfloor storage space according to the first aspect, the ground reinforcement body is formed in a polygonal continuous ring in a plan view, and the third water-blocking film is provided for each of the ground reinforcement bodies. Covering the first water-impervious film at the corner and the periphery thereof.

  When the ground reinforcement body is formed in a continuous ring with a polygonal shape in plan view, wrinkles and creases occur in the first water barrier film that crosses the ground reinforcement body in the vicinity of the corners, and the part is cut out and stored. Although necessary, since the third water-shielding film is disposed so as to cover the portion, it is possible to reliably prevent water from entering the ground reinforcement body.

  The invention according to claim 3 is an underfloor storage space which is surrounded by a ground reinforcement body and surrounded from the side of the house and formed from under the floor to the basement of the house. A film is disposed, a second water-impervious film is disposed along the inner surface of the ground reinforcement body, an upright portion along the outer surface of the second water-impervious film, and an outside of the first water-impervious film A third water-impervious film comprising a standing part along the side surface and a transverse part that crosses the ground reinforcing body at a predetermined height so as to connect them is arranged.

This underfloor storage space is a structure that resists earth pressure with a ground reinforcement body surrounding the surrounding side, so it can be constructed at a significantly lower cost than conventional basements that resist earth pressure with a reinforced concrete frame. is there.
In addition, a double waterproof treatment is applied to the first water shielding film on the outer side surface of the ground reinforcement body and the second water shielding film on the inner side surface, and the first water shielding film disposed on the outer side is provided. Since groundwater is blocked early and dropped downward, leakage into the underfloor storage space can be reliably prevented even when the surrounding ground contains a large amount of water due to heavy rain or the like. The second water barrier film is a waterproof / moisture-proof function that prevents moisture in the ground reinforcement body or water that has entered here from entering the storage space under the floor, and deodorization that blocks odors generated from the ground reinforcement body. Functions and a curing function to prevent the ground reinforcement body from drying so that the ground reinforcement body can be cured in a wet state.

In addition, since the first water-blocking film rises up to a predetermined height along the outer surface of the ground reinforcement body, partial excision is unnecessary and construction is easy. The third water barrier film covers the periphery of the upper end portion of the first water barrier film along the outer surface of the ground reinforcement body with the ups and downs, crosses the ground reinforcement body from the outside to the inside by the crossing part, and the second barrier film. Since it arrange | positions so that the outer surface of a water film may be covered with a standing part, the water leak into a ground reinforcement body can be prevented reliably.
Furthermore, it is desirable that the upper surface of the transverse portion of the first water shielding film is formed so as to gradually become lower from the inside toward the outside. Thereby, since water does not accumulate on the upper surface of the crossing part of the first water shielding film, the possibility of water entering the ground reinforcement body can be further reduced.

The underfloor storage space according to the present invention is a structure that resists earth pressure with a ground reinforcement body that surrounds the surrounding side, so it is constructed at a very low cost compared to a conventional basement that resists earth pressure with a frame such as reinforced concrete. Is possible. In addition, while the double waterproofing treatment is performed on the first water shielding film on the outer side surface and the second water shielding film on the inner side surface of the ground reinforcement body, the first water shielding film is formed on the third water shielding film. As a result of the waterproofing covering the wrinkles and the excised part, water leakage into the underfloor storage space can be surely prevented even if there is heavy rain or the like.
Further, the third water barrier film covers the periphery of the upper end portion of the first water barrier film along the outer surface of the ground reinforcement body with the ups and downs, crosses the ground reinforcement body from the outside to the inside by the crossing part, Since it arrange | positions so that the outer surface of this water-shielding film may be covered with an upright part, the water leak into a ground reinforcement body can be prevented reliably.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements, and redundant descriptions are omitted. In addition, the case where the ground reinforcement body 11 becomes a rectangular shape in planar view is demonstrated.

  FIG. 1 is a perspective view showing an embodiment of an underfloor storage space according to the present invention, and FIG. 2 is a longitudinal sectional view of FIG. As shown in these figures, the underfloor storage space 10 is formed by excavating the ground G, so that the height region from the lower floor to the basement of the first floor of the house and the planar region surrounded by the ground reinforcement body 11 on the lateral sides. Is formed. The ground reinforcement body 11 is a wall-like body having a rectangular shape in plan view and formed in a continuous ring shape. Preferably, at least a part of the ground reinforcement body 11 is located below the foundation B of the house and supports the foundation B from below. is there. The ground strengthening body 11 is obtained by improving the strength by modifying the ground G itself. Specifically, a ground improvement body in which soil is replaced, consolidated, reinforced, etc. with a chemical solution or the like, Wrap concrete (coarse concrete) containing cobbles or crushed stones with larger diameters. Thus, since the underfloor storage space 10 has a structure that resists earth pressure and vertical load by the ground reinforcement body 11, it can be constructed at an extremely low cost compared to a basement constructed with an RC frame. The underfloor storage space 10 is formed so as to be positioned above the shear surface S extending at the shear resistance angle φ of the ground G from the lower end side (point P1 in FIG. 2) of the ground reinforcing body 11 directly below the foundation B. Therefore, the excavation surface does not collapse during excavation or the foundation B does not sink after completion, and the structure is stable.

The underfloor storage space 10 includes a floor surface 12, a wall surface 13, a ceiling surface 14, a drain pit 15, an exhibition stand 16, a ladder 17, and the like.
Here, the floor 12 is formed by finishing the ground reinforcing body 11 'with mortar. A drainage pit 15 is formed at a substantially central portion of the floor surface 12, and the drainage pit 15 is covered with a lid 15a. The lid 15a is detachable, and the upper surface thereof is flush with the floor surface 12.
The wall surface 13 is obtained by appropriately finishing the inner side surface of the ground reinforcement body 11 and the inner side surface of the foundation B. As finishing, decorative panel pasting, mortar coating, mesh sheet pasting, etc. are suitable.
The ceiling surface 14 is obtained by applying an appropriate finish (here, a waterproof gypsum board) to the lower surface of the floor frame F on the first floor of the house. The floor frame F is formed with a doorway Fa that can be opened and closed for entering and exiting the underfloor storage space 10 from the first floor of the house. The height from the floor 12 to the ceiling 14 is 14
The height from the bottom surface of the drain pit 15 from which the lid 15a is removed to the ceiling surface 14 is preferably about 1700 mm.
The display stand 16 is a stand for displaying and displaying various objects on the display stand 16 along the corner where the floor surface 12 and the wall surface 13 intersect with each other using a ground improvement body, concrete, CB, or the like. The height is about 300 mm and the depth is about 450 mm.
The ladder 17 is detachably installed so as to connect the entrance / exit Fa and the floor surface 12.

Moreover, the 1st water-impervious film 20, the 2nd water-impervious film 30, and the 3rd water-impervious film 40 are arrange | positioned at the ground reinforcement body 11 so that it may mention later.
The first water shielding film 20 is formed in a bag shape whose upper side is open, and a drain hole h is provided at the bottom thereof. The first water barrier film 20 is also laid on the bottom surface of the ground reinforcement body 11, 11 ′, rises from the outer lower end sides P 3, P 3 along the outer surface of the ground reinforcement body 11, and has an intermediate height ( Predetermined height) Height across the ground reinforcing body 11 in the thickness direction substantially horizontally from the outside to the inside at the position P4 (so that it gradually decreases from the inside to the outside in consideration of the water gradient). It reaches the position P5, further rises along the inner surface of the ground reinforcement body 11, and the upper end side is fixed to the foundation B or the like above the ground height GL.
In addition, when many wrinkles generate | occur | produce in the 1st water-impervious film 20 when traversing the ground reinforcement body 11, even if it cuts off an excess part in the corner C vicinity of the ground reinforcement body 11, and eliminates a wrinkle Good.
The excised portion of the first water shielding film 20 is covered with a third water shielding film 40 described later.
The second water-impervious film 30 is formed in a bag shape whose upper side is open, the central part crosses the inside of the ground reinforcement body 11 ′ below the drainage pit 15, and the peripheral part is the inner surface of the ground reinforcement body 11. The upper end is overlapped with the inner surface of the first water shielding film 20 and is fixed to the foundation B or the like above the ground height GL together with the first water shielding film 20 in the upper part. .

As shown in FIG. 3, the third water-impervious film 40 is a transverse part that covers the upper surface of the transverse part 21 of the first water-impervious film 20 that traverses the ground reinforcement body 11 in the thickness direction at a midway height position P4. 41 and an upright portion 42 that covers the outer surface of the first water-impervious film 20 that rises together with the second water-impervious film 30 at the height position P5. It is fixed to foundation B etc. above GL.
Moreover, the crossing part 41 of the 3rd water-impervious film 40 becomes planar view substantially L-shape, and each corner C, C ... vicinity of the ground reinforcement body 11 and the 1st which covers the circumference | surroundings are covered. The upper surface of the transverse part 21 of the water shielding film 20 is covered. In addition, when the excess portion of the first water-impervious film 20 is excised in the vicinity of the corner C of the ground reinforcement body 11, the excised part can be covered with the third impermeable film 40, It is possible to reliably prevent water from entering from the excised portion.
Further, the upright portion 42 of the third water-impervious film 40 is formed inside the crossing portion 41, and its upper end rises upward so as to be fixed to the foundation B or the like above the ground height GL. ing.
Therefore, when the first water-impervious film 20 is disposed across the ground reinforcing body 11, it is caused by wrinkles or creases generated at the corners C, C. Since the water intrusion path can be covered, it is possible to reliably prevent water from entering the ground reinforcement body 11.
In addition, the drain hole h is provided in the 1st water shielding film 20 of the part located in the lower side of the ground reinforcement body 11. FIG. Therefore, even if water passes through the first water barrier film 20 and enters the ground reinforcement body 11, the water passes through the drain hole h while traversing the inside of the ground reinforcement body 11 from the outside to the inside. It will come out to the ground below.

  In this way, wrinkles and excised portions generated in the first water-shielding film by the third water-shielding film while performing double waterproofing treatment by the first water-shielding film 20 and the second water-shielding film 30. Since the covered waterproof treatment is applied, the water in the surrounding ground G is basically blocked at an early stage by the first water shielding film 20 arranged on the outside, as indicated by the solid line arrow in FIG. In each corner C, C..., It is blocked early by the third water-impervious film 40 and flows downward along the outer side surface. Even if the third water barrier film 40 is broken and the water in the ground G has infiltrated into the ground reinforcing body 11 from the side, the water is along the inner surface of the ground reinforcing body 11 as indicated by the dotted arrows. Since it is blocked by the second water-impervious film 30 that is disposed and can be pulled out from the drain hole h into the ground G below, It does not come me. In particular, when the underfloor storage space 10 is formed at a position close to the outer peripheral surface of the house, the water level in the ground G around the underfloor storage space 10 may temporarily increase due to heavy rain or the like. Even in such a case, the first water shielding film 20, the second water shielding film 30, and the third water shielding film 40 can reliably prevent water leakage to the underfloor storage space 10.

In addition, since the crossing part (part from P4 to P5) 21 of the first water shielding film 20 is gradually lowered from the inside toward the outside, water does not accumulate in this upper part.
If the upper end of the first water-impervious film 20, the upper end of the second impermeable film 30, and the upper end of the third impermeable film 40 are lower than the ground height GL, water due to rain or the like is here. The upper end portion of the first water barrier film 20, the upper end portion of the second water barrier film 30, and the upper end portion of the third water barrier film 40 may be used. Is fixed at a position higher than the ground height GL, so there is no such fear.

Further, a curing mat 22 made of rubber or resin is provided on the upper surface of the transverse part 21 of the first water-shielding film 20 and the upper surface of the transverse part 41 of the third water-shielding film 40 at each corner C, C. Are arranged in layers. This is because a large load acts from above while the ground reinforcing body 11 is in contact with the transverse part 21 of the first water-impervious film 20 and the transverse part 41 of the third water-impervious film 40. This is to prevent the 20 crossing portions 21 and the crossing portion 41 of the third water shielding film 40 from being damaged. For the same reason, a similar curing mat 32 is also placed on the upper surface of the bottom surface portion 31 (below the floor surface 12) 31 of the second water shielding film 30.
Here, the curing mats 22 and 32 are disposed so as to overlap the upper surfaces of the crossing portions 21 and 41 and the bottom surface portion 31, respectively, but may be disposed so as to overlap the lower surfaces of the crossing portion 21 and the bottom surface portion 31. 22 may be disposed so as to overlap the lower surface of the transverse part 21 and the upper surfaces of the transverse parts 21 and 41, or the curing mat 32 may be disposed so as to overlap both the upper and lower surfaces of the bottom part 31.

Then, the construction method of the underfloor storage space which concerns on this invention is demonstrated.
As shown in FIGS. 4 to 6, the construction method of the underfloor storage space according to the first embodiment of the present invention is characterized in that the ground is dug up and excavation is completed only once.

  First, in the first step, as shown in FIG. 4A, the ground G is excavated to form an excavation space X. Specifically, the excavation space x1 is formed by excavating a ring-shaped ground g1 in plan view below the planned position to be the foundation B of the house, and the ground g2 surrounded by the ground g1 is excavated. Thus, the excavation space x2 is formed. That is, the excavation space X is formed by excavating the ground portion where the underfloor storage space 10 is formed and the ground portion where the ground reinforcing body 11 surrounding the space is formed. If necessary, appropriate earth retaining is performed. The groove-shaped excavation space x3 is for ensuring the same cross section of the ground reinforcing body 11 'even around the drainage pit 15.

In the second step, as shown in FIG. 4B, the bottom surface of the excavation space X is flattened by filling the groove-shaped excavation space x3 (see FIG. 4A) with the ground reinforcement body 11a ′. To do. Moreover, the bag-shaped 1st water shielding film 20 is arrange | positioned along the inner peripheral side surface Xa of the excavation space X formed at the 1st process. Here, the bottom of the first water-impervious film 20 is the bottom of the excavation space X (the lower surface of the excavation space x1 where the ground reinforcement body 11 is to be formed and the planned position where the underfloor storage space 10 is formed. Of the excavation space x2). At this time, the upper end portion of the first water barrier film 20 is taken out of the excavation space X and held. Further, a water drain hole h is formed at a predetermined position on the bottom surface 31 of the first water shielding film 20.
Next, the floating formwork K is built so as to partition the excavation spaces x1 and x2. The floating mold K includes a barrier plate K1 and a holding portion K2 that holds the barrier plate K1 at a predetermined height. The holding portion K2 has a structure in which the height can be adjusted up and down with a turnbuckle or the like. A bag-like second water-impervious film 30 that covers the floating formwork K from the bottom is set and disposed inside the excavation space X to partition the excavation space x1 and the excavation space x2. A portion of the second water shielding film 30 laid on the bottom surface of the excavation space X becomes a bottom surface portion 31. A curing mat 32 is laid on the bottom portion 31.
And as shown in FIG.4 (c), the ground reinforcement body 11a of predetermined height is rolled and formed in the excavation space x1 inside the 1st water-impervious film 20. As shown in FIG. In addition, the ground reinforcement body 11 b ′ is formed with an appropriate thickness on the curing mat 32 laid on the bottom surface portion 31 of the second water shielding film 30. A drainage pit 15 is formed in the ground reinforcement body 11b ′. The floating formwork K2 is assumed to be buried. The peripheral part of the second water-impervious film 30 is raised and held at a position that does not interfere with the formation of the ground reinforcement body 11.

In a 3rd process, as shown to Fig.5 (a)-(c) and Fig.6 (a), it is below the planned position used as the foundation B, and the inside of the 1st water-impervious film 20 (excavation space x1). The ground reinforcing body 11 is formed in a continuous ring shape in plan view. In the fourth step, the second water shielding film 30 is disposed along the inside of the ground reinforcement body 11.
That is, as shown in FIG. 5 (a), the ground reinforcement body 11b is laminated at a predetermined height in the excavation space x1 and formed by rolling. In addition, it is desirable that the upper surface of the ground reinforcing body 11b is gradually lowered from the inside toward the outside (from the second water shielding film 30 side to the first water shielding film 20 side).
And as shown in FIG.5 (b), the 1st water-impervious film 20 is brought down inside, is laid as the crossing part 21 on the upper surface of the ground reinforcement body 11b, and also on the outer surface of the second water-impervious film 30 Start up again. At this time, it is desirable to cut out wrinkles and overlapping portions of the first water shielding film 20 as necessary.
And as shown in FIG.5 (c), the 3rd water-impervious film 40 is arrange | positioned from the 1st water-impervious film 20 to each corner C, C ... of the ground reinforcement body 11b, and its periphery. To do. At this time, the transverse portion 41 of the third water-impervious film 40 is disposed so as to overlap the transverse portion 21 of the first water-impervious film 20, and further, stands on the outer surface of the second water-impervious film 30. An upright portion 42 of the third water barrier film 40 is disposed so as to overlap the outer surface of the raised first water barrier film 20. Moreover, the curing mat 22 is laid on the crossing part 21 of the first water-shielding film 20 and the corners C, C.
Further, as shown in FIG. 6 (a), excavation is performed so as to be laminated on the curing mat 22 on the transverse portion 21 of the first water shielding film 20 and the transverse portion 41 of the third water shielding film 40. The ground reinforcement body 11c is formed at a predetermined height in the space x1.
As described above, the ground reinforcement body 11 is formed in a continuous annular shape in plan view below the planned position to be the base B and inside the first water-impervious film 20 (excavation space x1). A second water-impervious film 30 is arranged along the inner surface of the first reinforcing film 11, and the third water-impervious film 20 is formed on the corners C, C... A membrane 40 is disposed.

  Finally, as shown in FIG. 6B, the foundation B is constructed on the ground reinforcement body 11c. The first water-impervious film 20, the second water-impervious film 30, and the third water-impervious film 40 are raised between the foundation B and the formwork K, and their upper ends are above the ground height GL. Fasten to the foundation B etc. at the position. And as shown in FIG.6 (c), while disassembling the formwork K and constructing | assembling the floor frame F of the 1st floor which is not shown in figure, the display stand 16 is formed, mortar on the inner peripheral surface of the excavation space x2, The floor storage space 10 is completed by finishing with a decorative board, a mesh sheet or the like to form the floor surface 12, the wall surface 13, the ceiling surface 14, and the like.

According to the construction method of the underfloor storage space, the excavation is completed once, so that the construction is easy.
Moreover, since the floating formwork K is used, the ground reinforcement bodies 11 and 11 'can be constructed simultaneously.
Moreover, since the ground reinforcement body 11 is formed after arrange | positioning the 1st water barrier film 20 in the inner peripheral side surface Xa of the excavation space X, the 1st water barrier film 20 is fastened to the outer side surface of the ground reinforcement body 11. Hassle-free.
Here, the third step and the fourth step are performed in parallel, but the fourth step may be performed after the third step.

Next, the underfloor storage space according to the second embodiment of the present invention will be described.
In the underfloor storage space 10a of the present embodiment, as shown in FIG. 7, the third water-impervious film 40a covers the upper surface of the entire circumference of the transverse part 21 of the first water-impervious film 20 and the second water-impervious film. It differs from the first embodiment in that it covers the entire outer surface of the first water-impervious film 20 that rises together with the film 30.

The third water-impervious film 40a includes a transverse part 41a that covers the upper surface of the entire circumference of the transverse part 21 of the first water-impervious film 20 that crosses the ground reinforcing body 11 in the thickness direction at an intermediate height position P4, It is comprised from the standing part 42a which covers the whole surface of the outer surface of the 1st water-impervious film 20 rising with the 2nd water-impervious film 30 in the position P5, and the upper part 42a is provided in the inner periphery of the crossing part 41a. The upper end side of the upright part 42a is fixed to the foundation B or the like above the ground height GL.
Thereby, it cuts out partially in order to contain wrinkles and folds of the entire circumference of the portion that rises together with the transverse portion 21 of the first water barrier film 20 and the second water barrier film 30, and to the ground reinforcement body 11. Even if the water intrusion path is formed, it is possible to reliably prevent the water from entering the ground reinforcement body 11 by the third water shielding film 40a.

Then, the construction method of the underfloor storage space which concerns on 2nd embodiment of this invention is demonstrated.
First, as shown in FIGS. 4A to 4C and FIGS. 5A and 5B, the first part of the first step, the second step, and the third step are the same as those in the first embodiment. It is the same.
In the third step, as shown in FIG. 5 (c), the first disposed on the upper surface of the ground reinforcement body 11 and the outer surface of the second water barrier film 30 which are formed to be gradually lowered from the inside toward the outside. A third water-impervious film 40 a is disposed on the water-impermeable film 20. At this time, the transverse portion 41a of the third water-impervious film 40a is placed on the entire surface of the transverse portion 21 of the first water-impervious film 20 and is disposed on the outer surface of the second water-impervious film 30. An upright portion 42a of the third water shielding film 40a is disposed so as to overlap the entire outer surface of the first water shielding film 20 raised in an overlapping manner.
The subsequent third step and fourth step are performed in the same manner as in the first embodiment.

Next, the underfloor storage space according to the third embodiment of the present invention will be described.
As shown in FIG. 8, the underfloor storage space 10 b of the present embodiment covers the upper end portion of the second impermeable film 30 while the third impermeable membrane 40 b covers the upper end portion of the first impermeable membrane 20. It differs from the second embodiment in that it is arranged so as to cover and stand up.

The first water-impervious film 20 has a bag shape as a whole, and the bottom part reaches the outer lower end side P3 along the lower surface of the ground reinforcement body 11, and the peripheral part extends along the outer surface of the ground reinforcement body 11 therefrom. It arrange | positions so that an upper end part may be located in the slightly lower side rather than midway height position P4 (refer FIG. 2).
The second water-impervious film 30 crosses the ground reinforcement body 11 ′ at the center below the drainage pit 15, and the peripheral part rises along the inner surface of the ground reinforcement body 11. It is positioned so as to be above the height position P5 and below the foundation B.
The third water-impervious film 40b includes a transverse part 41b that traverses the ground reinforcement body 11 in the middle in the thickness direction at a height position P4 and a second water-impervious film that extends upward from the height position P5. It is comprised from the standing part 42b which covers the whole outer surface of the film | membrane 30, and the standing part 43b which covers the outer surface of the upper end part of the 1st water shielding film 20 arrange | positioned along the outer surface of the ground reinforcement body 11. The crossing portion 41b, the upright portion 42b, and the upright portion 43b are integrally formed so as to form a continuous ring, and the upper end side of the upright portion 42b is fixed to the foundation B or the like above the ground height GL. .

Thereby, since the 1st water-impervious film 20 can be formed small, the surface (part from P4 to P5) formed in the thickness direction in the middle height position P4 of the ground reinforcement body 11 substantially horizontally. It is not necessary to cover, and this portion does not cause wrinkles or folds, that is, the first water barrier film 20 can be easily disposed on the outer surface of the ground reinforcement body 11 without cutting the outside portion. it can.
Moreover, since the upper end part of the 2nd water-impervious film 30 is located so that it may become a lower side rather than the base B above the height position P5, forming the 2nd water-impermeable film 30 small. And can be easily arranged on the inner surface of the ground reinforcement body 11.
Further, the standing portion 43 b of the third water shielding film 40 b covers the entire outer surface of the upper end portion of the first water shielding film 20, and the rising portion 42 b is formed on the outer surface of the upper end portion of the second water shielding film 30. Covering the entire surface, the crossing part 41b crosses substantially horizontally in the thickness direction at the intermediate height position P4 of the ground reinforcement body 11, and thus reliably prevents water from entering the ground reinforcement body 11 from the ground G. Can do.

Then, the construction method of the underfloor storage space which concerns on 3rd embodiment of this invention is demonstrated.
First, as shown to Fig.4 (a), a 1st process is performed similarly to 1st embodiment.
In addition, after providing excavation space X (refer Fig.4 (a)), as shown in FIG. 8, the outer-periphery peripheral part of the excavation space X provided in the ground G is dug up, and the dug-out space Y is formed.
The second step is performed in substantially the same manner as in the first embodiment. Here, the first water-impervious film 20 is laid on the bottom surface of the excavation space X, and the upper end portion is in the extra-digging space Y slightly below the intermediate height position P4 (see FIG. 2). Arrange to position. The second water-impervious film 30 is set to cover the floating formwork K from the bottom, and is disposed in the excavation space X so as to be above the height position P5 and below the foundation B. The
The third step is performed in substantially the same manner as in the first embodiment.
Here, the third water-impervious film 40b covers the outer surface of the upper end portion of the first water-impervious film 20 with its standing part 43b, and crosses the intermediate heights P4 to P5 of the ground reinforcement body 11 with the transverse part 41a. And it arrange | positions so that the outer surface of the upper end part of the 2nd water-impervious film 30 may be covered by the standing part 42b.
The subsequent third step and fourth step are performed in the same manner as in the first embodiment.

As mentioned above, although embodiment of the underfloor storage space which concerns on this invention has been demonstrated, it cannot be overemphasized that this invention is not limited to this, and the appropriate change implementation along the meaning of invention is possible.
For example, the shape of the ground reinforcement body in plan view is not limited to a rectangular shape, and may be formed in a polygonal shape such as a triangle, a pentagon, a hexagon, or the like, and a continuous ring shape. In addition to the polygonal shape, the shape may be a circular shape, an elliptical shape, a shape in which a plurality of curves having different curvatures are combined, or a shape in which the protruding corner portion and the inward corner portion are mixed.
Moreover, the formation method of a ground reinforcement body performs the total excavation which excavates the ground part g1 excavated in order to form a ground reinforcement body, and the ground part g2 excavated in order to form an underfloor storage space at once. However, as shown in FIG. 9A, the ground portion g1 is first excavated (grooved), leaving the ground portion g2, and the first water shielding film 20 is disposed on the outer surface of the groove hole. Then, after filling the groove hole with the ground reinforcement body and forming the rolling pressure, the ground portion g2 may be excavated and the second water-shielding film may be disposed on the inner surface of the ground reinforcement body 11.
Furthermore, as shown in FIG. 9 (b), the ground portion g1 is alternately divided in the circumferential direction into a first groove group g11 and a second groove group g12. First, only the first groove group g11 is formed. Prior to excavation (crushing) to form the ground reinforcement body 11 there, then excavating (cuttering) the second groove group g12 to form the ground reinforcement body 11 there, after that, You may excavate the ground part g2 enclosed by the 1st slot group g11 and the 2nd slot group g12 at the circumference side.

It is a perspective view which shows an example of the underfloor storage space which concerns on 1st embodiment of this invention. It is a longitudinal cross-sectional view of FIG. It is a schematic diagram which shows an example which arrange | positions a 3rd water-impervious film. It is sectional drawing showing the construction method of the underfloor storage space which concerns on 1st embodiment of this invention. FIG. 5 is a cross-sectional view illustrating a process following FIG. 4. FIG. 6 is a cross-sectional view illustrating a process following FIG. 5. It is a schematic diagram which shows an example which arrange | positions the 3rd water-impervious film used for the underfloor storage space which concerns on 2nd embodiment of this invention. It is a schematic diagram which shows an example which arrange | positions the 3rd water shielding film used for the underfloor storage space which concerns on 3rd embodiment of this invention. (A), (b) is a schematic diagram showing the method of forming the ground reinforcement body 11, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Underfloor storage space 11 Ground reinforcement body 20 1st water shielding film 30 2nd water shielding film 40 3rd water shielding film 41 Transverse part 42 Upright part 43 Vertical part C Corner part

Claims (3)

An underfloor storage space that is surrounded by ground reinforcements and is formed from the bottom of the house to the basement,
Along the outer surface of the ground reinforcement body, the ground reinforcement body is crossed inward at a predetermined height, and further, a first water barrier film is disposed along the inner surface of the ground reinforcement body,
A second water barrier film is disposed so as to rise along with the first water barrier film at a predetermined height while being along the inner surface of the ground reinforcement body,
A third barrier comprising a transverse part covering the upper surface of the first water barrier film traversing the ground reinforcing body and an upright part covering the outer surface of the first water barrier film rising together with the second water barrier film. Water film is placed,
Underfloor storage space characterized by that. The ground reinforcement is formed in a polygonal continuous ring in plan view,
The third water barrier film covers each first corner of the ground reinforcement body and the first water barrier film in the vicinity thereof.
The underfloor storage space according to claim 1. An underfloor storage space that is surrounded by ground reinforcements and is formed from the bottom of the house to the basement,
A first water shielding film is disposed along the outer surface of the ground reinforcement body,
A second water barrier film is disposed along the inner surface of the ground reinforcement body,
From an upright portion along the outer surface of the second water barrier film, a lower portion along the outer surface of the first water barrier film, and a transverse portion that crosses the ground reinforcement body at a predetermined height so as to connect them. A third water barrier film is placed,
Underfloor storage space characterized by that.

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