JP2008156828A - Floor surface structure of external floor of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To drain rainwater poured on an external floor of a building or water sprayed when cleaning (draining of overflowed water) by the diffusion action of water to prevent the water from being collected on a floor surface after draining the water. <P>SOLUTION: This floor surface structure of the external floor of the building is provided with a wall 20 being a vertical part of the building constituting the building, a water resistant layer 4 formed in a region of the external floor of the building sandwiched between mutually facing walls 20 and being a flat waterproofing backing face formed by utilizing the skeleton slab 1 face of the building as it is, a floor layer 2 fixed on the water resistant layer 4 and forming a floor surface 2a having a higher level than that of the water resistant layer 4, and a drain ditch 10 having a drain hole 11 communicating with the outside of the building and formed while being surrounded by a bottom face 10a having a lower level than that of the floor surface 2a, the wall 20, and the side face of the floor layer 2. A floor ditch 3a dividing a region of the floor surface 2a and having an end continuous with the drain ditch 10 is provided on the floor layer 2, and the depth d of the floor ditch 3a is equivalent to a step h generated on the floor surface 2a or more than the step h. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structure of an external floor of a building including a veranda of a building such as a house, a roof (a rooftop), or an outer corridor of an apartment house, and more particularly, an external floor that does not cause a puddle due to watering in rainy weather or cleaning. It relates to the floor structure.

  An external floor area such as a veranda or a roof of a building such as a house or an outer corridor of an apartment house forms a slope (1/50 to 1/100) to treat rainwater in the external floor area. Considering drainage. Even on an outside floor such as a veranda, a roof, or an outer corridor having a sloped surface for drainage, water droplets that remain on the surface are generated by the surface tension of water. However, if it is a small amount of small water droplets, it will dry and disappear due to natural evaporation.

  On the other hand, water droplets staying on the surface of the external floor may not completely evaporate, and a puddle remaining on the floor surface may be left behind from the drainage. Such a puddle occurs at a place where a step or a depression is partially formed on the floor surface. The partial level difference or depression on the floor is often caused by variations in the accuracy of construction by the plasterer when the sloped surface is formed with a trowel using a mortar material or the like. And when water accumulates in the level | step difference and hollow which arose on the floor surface, for the person who uses a building, you have to be careful not to slip and fall and footwear get wet.

  On the other hand, in Patent Document 1, for example, by using a dry-type panel for a gradient foundation, which is produced in a factory and has high dimensional accuracy, as a foundation of an external floor such as a veranda, a roof, or a corridor, It has been proposed to increase the accuracy of the waterproof base surface when forming the surface. This technology constitutes a waterproof foundation for roofs by laying a plurality of graded plates whose bottom surface is a horizontal plane and the top surface is a gradient surface, and forms a waterproof foundation with a gradient without constructing mortar. be able to.

  Further, in Patent Document 2, in order to keep the height from the floor surface of the lower end portion of the opening that can enter and exit facing an external floor such as a veranda or a roof, the plane dimensions of these floor surfaces are not limited. Regardless, a technique has been proposed in which a horizontal underwater line is formed from the external floor to the room side, and a drain is provided along the underwater line. In this technique, the height of the lower end portion of the opening can be kept constant regardless of the width dimension or gradient of the floor surface.

JP 2001-098714 A JP 2005-097915 A

  However, in the case of having a large number of entrances and elevating doors of the outer staircase like the outer corridor area of an apartment house using the technology of Patent Document 1, if these parts are all on the water side of the slope, the slope Since the assignment of the gradient board for the groundwork becomes complicated and difficult to install, it is reliant on the construction of the gradient groundwork using conventional on-site mortar, and the actual situation is that the poor accuracy of construction was accepted. is there.

  In particular, in the case of the sheet waterproofing method, even if there is no unevenness and a highly accurate slope surface can be formed, a step is generated in the seam portion (waterproof sheet lap welded portion), and this step affects the floor surface. The problem that the water pool tends to occur can not be solved.

  Therefore, the present invention drains rainwater poured on the floor surface outside the building, water sown during cleaning, etc. by the diffusion of water (treatment of overflow water), and the floor after drainage. To provide a floor structure of an external floor of a building in which no puddle is generated on the surface.

  The present inventor has developed in order to eliminate a water pool generated on an outside floor such as a veranda, a roof, and an outer corridor. If it is possible to guide the overflowed water to the drainage pipe with sufficient drainage from the floor surface that uses the building slab surface of the building as it is without providing a drainage gradient, it is possible to guide the overflowing water to the drainage pipe with sufficient drainage capacity. Based on the idea that a puddle does not occur due to the diffusion action, the present invention has been conceived by paying attention to a partial dent and a step on the floor surface where the puddle is generated.

  That is, the floor surface structure of the external floor of the first building according to the present invention is provided in a building external floor region sandwiched between a building vertical part constituting the building and the building vertical part facing the building, and A flat waterproof base formed by using the building slab surface of the building as it is, a floor layer fixed to the waterproof base and a floor having a higher level than the waterproof base; A drainage hole formed to be surrounded by a bottom surface that is lower than a floor surface of the floor layer and a vertical portion of the building and a side surface of the floor layer, and has a drain outlet that leads to the outside of the building. The floor layer is provided with a floor groove that divides the area of the floor surface, the end of which is continuous with the drainage groove, and the depth of the floor groove corresponds to a step generated on the floor surface. Or a depth greater than the step.

  The floor structure of the external floor of the second building according to the present invention is the floor structure of the external floor of any one of the above buildings, wherein a waterproof layer is formed between the waterproof base surface and the floor layer. It has been done.

  Further, the floor structure of the external floor of the third building according to the present invention is such that, in the floor structure of the external floor of the building, the level difference generated on the floor surface is the tolerance of unevenness set on the frame slab surface. The depth corresponding to the tolerance dimension is taken into consideration.

  Here, the building vertical part constituting the building refers to a part of the building such as an outer wall, a waist wall such as a veranda, or a parapet such as a rooftop, and includes a housing part or an exterior part that forms a part that rises in the vertical direction. Moreover, the height of the vertical part of a building should just ensure the height which can form a drainage ditch around the floor layer provided in an external floor.

  In addition, the structure structure of the building here is not particularly limited. A floor is manufactured in a factory or the like in which a frame is assembled with a rod-shaped member such as a column or a beam, and the dimensions of the frame are standardized. A frame-type frame structure in which a panel or an outer wall panel is attached and a load is supported on them may be used, or another panel-type frame structure or unit-type structure may be used. Furthermore, a conventional RC structure or a wooden frame construction method may be used. The use of a building is not limited to a specific use such as a house, an office, or a store.

  The exterior floor is a veranda, a rooftop floor that is a balcony or roof, and a shared exterior corridor for the apartment house. Therefore, the external floor is a flat roof or is configured as a part of a cantilever-like veranda taken out of a building frame.

  The waterproof ground surface of the present invention is a waterproof ground surface composed of a building slab surface of a building. That is, the floor structure according to the present invention has a flat waterproof ground surface formed by using the building slab surface as it is, and the surface of the substantially flat slab constructed by building the building slab. No drainage gradient with cement mortar or graded waterproof base panel. The floor surface of the building slab is used as a waterproof base, and the floor panel that is the floor layer is provided directly or through a waterproof sheet, or the surface of the building slab surface is flat and waterproof with no thermal gradient. A ground panel (styro foam, neoma foam, etc.) may be laid to provide a waterproof ground surface.

  A slab is a plate that receives a vertical surface load. Generally, it is defined as a floor panel of reinforced concrete (Architecture Dictionary 2nd edition), but the “frame slab” in the present invention is not limited to a floor slab of a reinforced concrete frame. In the case of a building structure of a building structure, a standard lightweight lightweight concrete floor panel is laid and integrated with joint mortar, and the building structure floor slab of a wooden structure is made of wood-based material. This refers to the floor that is an integral part of the floor panel used.

  The floor layer is configured, for example, by disposing a floor panel with a standardized dimension having a floor groove having a preset depth on the surface thereof on a waterproof base surface composed of a housing slab surface.

  It is preferable to fix in a watertight manner so that rainwater or the like does not stay between the floor layer and the waterproof base surface composed of the frame slab surface. As a method of fixing the floor layer to the waterproof base surface or the waterproof layer, there is a method of fixing with a waterproof sealant, adhesive or mortar.

  In addition, the floor structure is constructed by using a waterproof synthetic resin plate, which is a floor panel constituting the floor layer, or a panel with a waterproof coating or waterproof lining on the surface, and by placing a sealing material between the floor panels. It is preferable to ensure the whole waterproofness.

  Further, it is necessary to waterproof the drainage groove formed between the floor layer and the wall that is the vertical part of the building. In this case, for example, it is conceivable to apply a waterproof coating to the drain groove.

  Regarding waterproofing of the floor structure according to the present invention, a waterproof layer may be separately formed between the waterproof base surface composed of the housing slab surface and the floor layer. The structure of the waterproof layer is not particularly limited, and a waterproof layer made of a resin sheet, a waterproof layer made of asphalt roofing, or a waterproof layer made by applying a waterproof paint can be selectively employed.

  In this case, the floor panel itself constituting the floor layer does not necessarily need to be provided with waterproof performance. Examples of floor panels that do not have special waterproof performance include concrete plates, cement-based molded products, and wooden panels. Etc. It is preferable to use such a floor panel that is standardized in size and unitized with good workability.

  The floor groove formed on the floor surface of the floor layer is formed by dividing the area of the floor surface. The size and area of the region divided by the floor groove are not limited, and it is preferable to set it assuming the amount of rainfall and the amount of water spray. For example, the floor grooves can be provided in a lattice shape at a pitch of 100 mm. Moreover, it is preferable to make this pitch respond | correspond to the module dimension set to the building. Thus, by making it correspond to a module dimension, it becomes possible to comprise a floor layer by fixing a floor panel corresponding to arrangement of a member which constitutes a frame.

  The depth of the floor groove is equal to or larger than the allowable tolerance dimension of unevenness set in advance on the floor surface of the floor layer. Here, the tolerance for unevenness of the frame slab surface is the maximum and minimum error dimensions considering the accuracy of part manufacturing dimensions such as the deflection of the beams that make up the frame and the level difference of the floorboard, and the accuracy of construction when assembling the frame. In other words, it is the allowance for assembling the housing. It is also possible to consider the unevenness caused by the waterproof base panel surface and the waterproof sheet surface in addition to the housing slab surface in the allowable tolerance dimension of the uneven surface. However, the dimension of the groove width is not particularly limited, and it is preferable that the groove width is appropriately set in consideration of the amount of rainfall and the amount of water spray.

  In the present invention, the drainage of the water poured on the floor is not expected to flow based on the gradient, but is expected to flow into the drainage channel (overflow drainage) as the water level rises in the floor channel. Is. For this reason, even if a large amount of water is poured in a short time by setting the capacity of the floor groove per floor surface area according to the assumed amount of water, assuming the amount of rainfall and watering in advance. It is possible to drain water smoothly. That is, smooth drainage can be realized by setting the pitch and width dimension of the floor groove in consideration of the amount of rainfall and the amount of water spray.

  Further, the floor groove has a continuous end connected to the drainage groove. Therefore, the water poured onto the floor surface falls into a floor groove that divides the floor surface by the natural diffusion action of water, and is drained by being poured into the drainage groove through the floor groove. In principle, the drainage groove is formed around the entire circumference of the floor layer, but may be formed at a part of the whole circumference.

  A drain outlet leading to the outside of the building is formed in the drainage ditch. A drain pipe is connected to the drain port, and overflow drainage is drained from the drain port to the outside of the building through the drain pipe.

  Next, the basic technical idea of the present invention will be described. In general, when building is built on site, inspections are carried out to ensure that the assembly accuracy, including the accuracy of column installation and horizontal (floor surface) unevenness, is within a preset tolerance range. Then proceed to the next process (waterproofing). Particularly in buildings with industrially produced frames, the dimensional accuracy of columns and beams is within a certain range, and the assembly accuracy of the building frame is also high.

  Therefore, the unevenness of the building floor slab surface after the building building is completed is within the allowable tolerance range.

  For this reason, in the present invention, a floor layer is formed on a waterproof base surface composed of a frame slab surface or a waterproof base panel, and is equal to the maximum allowable unevenness dimension preset for the floor surface of the floor layer. Or floor grooves with large depth were formed. Since the error that most affects the occurrence of unevenness of the floor surface of the floor layer is the error of the frame slab surface, the present invention considers at least the allowable tolerance dimension of the unevenness of the frame slab surface.

  Furthermore, an error of unevenness of the surface formed by the waterproof base panel laid on the frame slab surface and unevenness of the waterproof sheet surface may be taken into consideration. Because these materials are industrial products, their standard dimensions are also highly accurate and have little influence on the uneven surface of the floor.

  The floor layer is a flat external floor that does not have a drainage gradient. A drainage ditch is provided around the external floor, and the water poured on the floor of the external floor during raining or watering during cleaning, etc. It is drained via. At this time, the water pool retained on the floor surface due to unevenness such as the frame slab surface is absorbed by the floor groove, and the water pool is not generated on the surface of the floor layer.

  In the present invention, the unevenness that occurs on the external floor is noticeably effective when, for example, the central portion in the width direction of the outer corridor where the water pool is likely to occur on the outer floor such as the outer corridor of the apartment house becomes low. Of course, it is effective even when the area is high. Moreover, it is suitable also when the unevenness | corrugation where the unevenness | corrugation continues continues. This is particularly the case in the longitudinal direction of the outer corridors of apartment buildings and the external floor of a veranda with a relatively large area of a detached house.

  In the present invention, when the central portion in the width direction of the outer corridor of the apartment house is lowered, the highest water level of the puddle of that portion is the same as or lower than the floor groove at the lowest position of the external floor surface. For example, (1) when both ends of the external floor surface (bottom surface of the floor groove) are at substantially the same height, the horizontal line connecting these both ends becomes the highest water level of the floor groove, and (2) the external floor surface When either one of the two end portions (the bottom surface of the floor groove) is low, the maximum water level is reached when water accumulates at the lower end portion.

  In the present invention, the water poured on the floor surface of the external floor at the time of raining or watering such as cleaning flows into the floor groove and temporarily stores the water without providing a drainage gradient on the floor surface of the external floor. The water that has flowed in reaches the water storage capacity of the floor groove, and the water that exceeds the maximum water level is drained from the end of the floor groove to the drain (overflow drainage). In this way, water up to the maximum water level is accumulated in the floor groove as much as possible, but the water surface at this time is lower than the floor surface, and no water pool occurs on the floor surface. Then, the water collected in the floor groove evaporates naturally after the rain stops or the watering is finished.

  According to the floor structure of the external floor of the building according to the present invention, a water pool does not occur even if a slope for drainage is not provided on the floor surface of the external floor of the building. It is possible to design the drainage gradient in the actual design, which is the stage of building design planning, and to omit the construction management, thereby shortening the construction period.

  In the floor structure of the external floor of the first building according to the present invention (hereinafter simply referred to as “floor structure”), an allowable error set in advance on an external floor area such as a veranda or a roof of a building such as a house or an outside corridor. Even when a step is generated on the floor surface, when the water applied to the surface of the external floor region diffuses in all directions, the floor groove can temporarily store the water pool generated by the step on the floor surface. For this reason, water is stored in the floor groove around the position where the level difference is generated, and a large water pool does not occur until it naturally evaporates.

  When a large storage capacity is required in response to an increase in the amount of water, the water pool around the position where the level difference has occurred is provided on the floor surface by the diffusion of water while maintaining a height that does not overflow from the floor groove. It diffuses in the floor groove. That is, the storage length is extended. When the amount of water further increases and the storage capacity of the floor groove becomes insufficient, the overflowing water flows into the drainage groove and is further discharged to the outside through the drainage port.

  Therefore, even if a step based on a preset tolerance is generated on the outer floor, the floor groove has a depth corresponding to the step or higher, so that water poured on the outer floor The water is stored in the floor groove, and overflows from the end of the floor groove into the drainage groove as the water level rises in the floor groove. Thus, even if a step is generated on the outer floor, the stored water level does not exceed the depth range of the floor groove, and the poured water does not overflow the surface of the outer floor. The water stored in the floor groove evaporates easily and does not cause a puddle for a long time.

  Further, in the second floor structure according to the present invention, a waterproof layer may be constructed on the waterproof base surface that is the slab surface of the frame, and a floor layer may be laid on the waterproof layer. And the construction for removing the water pool can cut the edges without affecting each other, and the construction management is easy.

  Further, in the third floor structure according to the present invention, since at least the frame slab surface in which the accuracy within the preset allowable tolerance dimension is guaranteed is used as the floor ground surface, the construction state of the building frame is determined. Inspection ensures that the quality of construction and the accuracy of assembly of parts are within the allowable tolerance range within the preset construction standards. Can be prevented.

  The first to third floor structures of the present invention are particularly effective when a plurality of entrances, stairs, and the like are concentrated in the outer corridor of an apartment house, and there are many parts that avoid water pools.

  Hereinafter, the most preferable form of the floor structure according to the present invention will be described. The floor structure of the present invention is a structure of a floor surface that is exposed to rainwater or cleaning such as a veranda, a roof, or an outside corridor constructed outside the building, and even if a large amount of water is splashed, The present invention relates to a floor structure in which no is formed.

  An embodiment of a basic floor structure according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view illustrating a floor structure according to this embodiment. FIG. 2 is a diagram for explaining a characteristic configuration of the floor structure according to the present invention. FIG. 3 is a diagram illustrating a configuration in a direction orthogonal to FIG. FIG. 4 is a diagram for explaining a configuration of a floor structure in which a waterproof base having a heat insulating plate is configured. FIG. 5 is a diagram for sequentially explaining how water poured on the floor flows. FIG. 6 is a perspective view of an outer corridor of a general apartment house to which the floor structure according to the present invention is applied.

  Hereinafter, the floor structure A according to the present invention will be described with reference to FIGS. The floor structure A is configured by using a frame slab 1 constituting a building frame. A floor layer 2 is formed on the upper surface of the frame slab 1 as shown in FIG. This is the floor surface 2a. 1 is a cross-sectional view in the width direction of the outer corridor of the apartment house shown in FIG. The frame slab 1 is basically configured as a horizontal plane, although unevenness within a preset allowable tolerance range is allowed.

  The floor layer 2 is configured by laying a large number of floor panels 3 on top of the housing slab 1. The floor panel 3 is a tile-shaped panel having a preset plane size and thickness, and floor grooves 3a are formed in a lattice pattern on the surface. The planar dimensions (vertical dimension and horizontal dimension) of the floor panel 3 are not particularly limited, but preferably have a dimension that is a multiple of the module dimension set in the building. Moreover, it does not specifically limit about thickness, It is preferable to set suitably considering workability | operativity.

  The floor groove 3a formed in the floor panel 3 has the maximum allowable tolerance dimension (h, see FIG. 2) including the unevenness whose depth (d, see FIG. 2) is preset with respect to the frame slab 1 ) Or more. The depth d of the floor groove 3a is preferably about 1/2 of the thickness of the floor panel 3 or smaller. Further, the depth d of the floor groove 3a may be appropriately set in consideration of the strength of the floor panel 3.

  For example, when the maximum value h of the allowable tolerance dimension in the vertical direction of the frame slab 1 is 5 mm and the thickness of the floor panel 3 is 30 mm, the depth d of the floor groove 3a formed in the floor panel 3 is 5 mm to Within a range of about 10 mm. Moreover, it is preferable to set the width dimension of the floor groove 3a on the assumption of the rainfall that can be drained in advance, and is set to about 5 mm in this embodiment.

  Moreover, it is preferable that the pitch of the floor groove 3a formed in the floor panel 3 is a dimension which can divide the plane of the floor panel 3 substantially equally, and is set to about 100 mm in the present Example.

  The floor panels constituting the floor layer 2 are arranged with a predetermined distance from the wall 20. The side surface 3b facing the wall 20 of the floor panel 3 constituting the wall 20 and the floor layer 2 is separated by a distance corresponding to the dimension of the drainage groove 10, and has a depth equal to the thickness of the floor panel 3 therebetween. A drainage groove 10 surrounded by the bottom surface 10a is configured.

  As described above, since the drainage groove 10 is configured on the upper surface of the housing slab 1, the bottom surface 10a of the drainage groove 10 is configured as a flat surface within the gradient. The drainage groove 10 is provided with a drainage port 11 opened to the bottom surface 10a, and a drainage pipe 12 connected to an underground pipe installed outside the building (not shown) is connected to the drainage port 11. Therefore, the water that has flowed into the drainage channel 10 rises from the bottom surface 10 a to the drainage port 11, and drains to the outside of the building through the drainage pipe 11.

  The frame slab 1 itself cannot exhibit waterproofness. For this reason, the drainage groove 10 is required to exhibit high waterproof performance. Moreover, as the floor panel 3 which comprises the floor layer 2, what has waterproof property and what does not have waterproof property can be used selectively.

  For example, floor panels that are not waterproof include concrete plates, cement-based molded products, wooden panels, and the like, and floor panels that are waterproof include synthetic resin plates and panels that are waterproof coated or waterproof lining.

  When the floor panel 3 having no waterproof property is used, as shown in FIG. 1 (a), the waterproof layer 4 is applied to the entire upper surface of the frame slab 1, and the wall 20 is set up and applied. By laying the floor panel 3 on the upper surface of the layer 4, the entire floor structure A including the drainage groove 10 can be made waterproof.

  When the floor panel 3 having waterproof properties is used, the waterproof layer 4 extends from the wall 20 through the bottom surface 10a to the side surface 3b of the floor panel 3 so as to correspond to the drainage groove 10 as shown in FIG. And the sealing 5 is applied to the joint formed at the connection portion of each floor panel 3, so that the entire floor structure A can be made waterproof.

  In addition, as shown in FIG. 8 to be described later, the structure of the drainage groove 10 is slightly different depending on the configuration of the member of the vertical portion of the building facing the side surface 3b of the floor panel 3 constituting the floor layer 2. Yes.

  In the floor structure A configured as described above, as shown in FIG. 2, it is permitted that the slab 1 is uneven with a preset allowable tolerance maximum value h. In this case, the floor layer 2 constructed by laying a plurality of floor panels 3 also has unevenness due to the unevenness of the frame slab 1, but the unevenness of the floor layer 2 is also within the range of the maximum allowable tolerance h. is there.

  On the other hand, the depth d of the floor groove 3a formed in the floor panel 3 is equal to or larger than the maximum allowable tolerance h (in the present embodiment, it is configured as d> h). The lower bottom surface at the end of the floor groove 3a constructed continuously determines the maximum water level in the floor groove 3a. When the water flowing into the floor groove 3a reaches the water storage capacity of the entire floor groove and exceeds the maximum water level, the water overflows from the end of the floor groove 3a into the drain groove 10.

  For example, when the heights of the bottom surfaces of both end portions of the floor groove 3a are the same, the line connecting the both end portions becomes the water surface 6 having the highest water level. In this case, the difference between the lowest position of the floor surface 2a of the floor layer 2 and the water surface 6 of the highest water level is the dimension obtained by subtracting the maximum allowable value h of the unevenness from the depth d of the floor groove 3a. The water surface 6 does not exceed the floor surface 2 a of the floor layer 2. Therefore, a water pool does not occur on the floor surface 2a of the floor layer 2.

  3 is a view showing a cross section in a direction perpendicular to the direction shown in FIG. 2, and is a cross-sectional view in the depth length direction of the outer corridor of FIG. 6 to be described later. As shown in the figure, the frame slab 1 is configured by supporting a plurality of lightweight cellular concrete (ALC) slabs with beams 13. The ALC floor slab constituting the frame slab 1 is supported by beams 13 at both ends, and the portion corresponding to the central portion is continuous in a sinked state, and the floor layer 2 is laid on the surface of the slab frame slab 1 Yes.

  Therefore, the deflection of the ALC floor slab causes unevenness within the maximum tolerance h of the housing slab 1. Even in such a case, the depth d of the floor groove 3a formed in the floor panel 3 described above is equal to or larger than the maximum allowable tolerance h (in the present embodiment, it is configured as d> h). do it.

  FIG. 4 shows a floor structure in which a waterproof base panel 14 made of a heat insulating material laid on the surface of the housing slab 1 and a resin waterproof sheet 26 as the waterproof layer 4 are laid between the floor panel as the floor layer 2. It is. A step portion corresponding to the thickness (2 mm) of the waterproof sheet is generated by the joint portion 26a of the waterproof sheet (a portion where the waterproof sheets to be laid adjacent to each other are welded while securing an overlap), and constitutes the floor layer 2 The floor panel 3 is in a waved state, and the floor surface is uneven.

  In this case, if the depth d of the floor groove 3a is equal to or larger than the maximum allowable value h of the housing plus the allowable tolerance ha of the waterproof base panel 14 and the allowable tolerance hb of the waterproof sheet 26, Good (d> h + ha + hb).

  Next, how rainwater falls on the floor structure A will be described with reference to FIG. As shown in FIG. 2A, the floor surface 2a of the floor layer 2 is divided into a number of regions by floor grooves 3a formed in a lattice shape in advance. As shown in FIG. 2B, the rain water that has uniformly fallen on the floor surface 2a diffuses in the four directions (in the direction of the arrows) from the floor surface 2a, and falls and stays in the floor groove 3a that divides each region.

  The rainwater staying in each floor groove 3a rises as the amount of rainfall increases, and when the water surface level exceeds the bottom surface at both ends of the floor groove 3a as shown in FIG. The overflowing rainwater flows into the drainage groove 10 from the end of the floor groove 3a. As shown in FIG. 4D, the rainwater that has flowed into the drainage groove 10 rises with the amount of rain and is drained from the drainage port 11 to the outside of the building.

  As described above, a positive water gradient is not formed in the floor structure A, and there is no function of causing the rain water that has fallen to flow according to the water gradient. However, smooth drainage can be realized by, for example, an overflow from the floor groove 3a to the drainage groove 10 and an overflow from the drainage groove 10 to the drainage port 11 accompanying the rise in the water level.

  In this embodiment, the floor structure A is applied to the outer corridor B of the apartment house shown in FIGS. FIG. 7 is a plan view for explaining an embodiment in which the floor structure according to the present invention is applied to the outer corridor of an apartment house. FIG. 8 is a view for explaining the structure of the drainage groove and is a cross-sectional view of the main part of FIG.

  The apartment house of the present embodiment is configured by arranging a plurality of apartments 31 and a detached house 32 on the same level. The outer corridor B is constructed around the apartments 31 and the detached houses 32, and the surroundings are surrounded by the walls 20 including the outer wall 20a and the veranda waist wall 20b constituting the building frame, and a staircase 21 is provided at a predetermined position. Is provided.

  FIG. 8 is a detailed cross-sectional view of each part of FIG. FIG. 8A shows a state where the wall 20 is constituted by a waist wall 20b, and the drainage groove 10 is formed along the waist wall 20b. A waterproof base steel plate 25 is disposed between the upper surface of the housing slab 1 and a position sufficiently higher than the floor surface 2a of the floor layer 2 of the waist wall 20b, and is fixed to the housing slab 1 and the waist wall 20b by screws 27. Yes. And the waterproof sheet 26 is fixed to the upper surface of this waterproof base steel plate 25 using an adhesive etc., and the waterproof layer 4 is comprised by this. Accordingly, the drainage groove 10 is configured with sufficient waterproofness from the bottom surface 10a to a high position.

  In FIG. 2B, the wall 20 is constituted by the outer wall 20a, the waterproof base steel plate 25 is disposed between the upper surface of the housing slab 1 and a sufficiently high position of the outer wall 20a, and the housing slab 1, It is fixed to the waist wall 20b. The waterproof sheet 4 is configured by fixing the waterproof sheet 26 to the upper surface of the waterproof base steel plate 25 using an adhesive or the like. Accordingly, the drainage groove 10 is configured with sufficient waterproofness from the bottom surface 10a to a high position.

  FIG. 2C shows a state where the drainage groove 10 faces the entrance door 32 a of the detached house 32. The detached house 32 is configured to make the step between the entrance floor 32b and the floor surface 2a of the outer corridor B as small as possible from a barrier-free viewpoint. For this reason, the drainage groove 10 is configured with a dimension whose depth is substantially equal to the thickness of the floor panel 3 constituting the floor layer 2.

  FIG. 4D shows a state in which the drainage groove 10 faces the entrance door 31 a of the apartment 31. In the apartment 31, it is not always necessary that the height of the entrance floor 31b is substantially equal to the floor surface 2a of the outer corridor B. For this reason, the entrance floor 31b is configured to be sufficiently higher than the floor surface 2a. For this reason, the drainage groove 10 is configured to the full height of the lower frame of the entrance door 31a.

  In addition, although the said embodiment demonstrated centering on the exterior corridor of an apartment house, the use and site | part of a house are not restricted to this, As mentioned above, this invention is applicable to the external floor of a building in general. .

  In the floor structure according to the present invention, it is possible to configure the external floor using the frame slab surface assured with high accuracy as it is, and it is possible to realize smooth drainage. For this reason, it is advantageous to apply to floors where rainwater such as roofs, verandas, and outer corridors of buildings can be poured or sprinkled during cleaning.

It is a schematic cross section explaining the floor structure according to the present embodiment. It is a figure explaining the characteristic structure in the floor structure concerning this invention. It is a figure explaining the structure of an orthogonal direction with respect to FIG. It is a figure explaining the structure of the floor structure which comprised the waterproof base | substrate which has a heat insulating board. It is a figure explaining a mode that the water poured on the floor flows. It is a perspective view of the exterior hallway of the general apartment house to which the floor structure concerning the present invention is applied. It is a top view explaining the example which applied the floor structure concerning the present invention to the corridor of an apartment house. It is a figure explaining the structure of a drain groove, and is sectional drawing of the principal part of FIG.

Explanation of symbols

A floor structure B exterior corridor 1 frame slab 2 floor layer 2a floor surface 3 floor panel 3a floor groove 3b side surface 4 waterproof layer 5 sealing 6 water surface 10 drain groove 10a bottom surface 11 drain port 12 drain pipe 13 beam 14 waterproof ground panel 20 wall 20a Outer wall 20b Waist wall 21 Staircase 25 Waterproof base steel plate 26 Waterproof sheet 26a Waterproof sheet joint 27 Screw 31 Apartment 31a Entrance door 31b Entrance floor 32 Detached house 32a Entrance door 32b Entrance floor

Claims (3)

The vertical part of the building that makes up the building,
A flat waterproof ground surface provided in a building external floor region sandwiched between the building vertical parts facing each other and formed using the building slab surface of the building as it is;
A floor layer formed on a floor surface fixed to the waterproof base surface and having a higher level than the waterproof base surface;
A drainage channel formed to be surrounded by a bottom surface that is lower than the floor surface of the floor layer, the vertical part of the building, and a side surface of the floor layer, having a drainage port that leads to the outside of the building;
Provided,
The floor layer is provided with a floor groove that divides the area of the floor surface and whose end portion is continuous with the drainage groove, and the depth of the floor groove corresponds to a step formed on the floor surface. Or the floor structure of the external floor of the building characterized by being deeper than the step.   The floor structure of the external floor of the building according to claim 1, wherein a waterproof layer is formed between the waterproof base surface and the floor layer.   The floor surface structure of the external floor of the building according to claim 1 or 2, wherein the step generated on the floor surface takes into account a depth corresponding to at least a tolerance tolerance of unevenness set on the frame slab surface.

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