JP2010070903A - Precast concrete foundation material and method for connecting the same - Google Patents

Abstract

[PROBLEMS] To provide a precast concrete foundation material capable of efficiently and inexpensively constructing a solid solid foundation in which a bottom plate and a rising portion are integrated.
A female base rail (1) is provided with a female joint rail (13), and a male base rail (2) is provided with a male joint rail (27). A part (11) of the reinforcing bar is pulled out from the bottom surface (5). The joint rails (13, 27) are configured to be fitted with a gap. Thereby, a base material (1,2) can be easily connected in the field. Moreover, grout material (41) can be inject | poured into a connection part. Furthermore, concrete can be driven by connecting the drawn out reinforcing bars (11) and the bottom reinforcing bars (39).
[Selection] Figure 1

Description

  The present invention is composed of a plurality of blocks formed in a predetermined width in advance, and when these blocks are connected to each other at the abutting end face or side face, a solid foundation rising portion is formed to support the walls and pillars of the building. The present invention relates to a precast concrete base material and a connecting method thereof.

  A fabric foundation or a solid foundation is adopted as the foundation of many wooden houses and the like. The fabric foundation is a foundation that supports a wall surface of a building provided in a band shape having a predetermined height, and the cross-sectional shape exhibits an inverted T time shape having a predetermined thickness. A so-called footing corresponding to a T-shaped horizontal bar is placed on the leveled concrete and buried in the ground to prevent subsidence, and the column and wall surface of the building are supported by the part corresponding to the vertical bar. It is like that. On the other hand, a solid foundation is composed of a so-called rising portion having a predetermined height that supports the wall surface of a building, and a plate-like bottom plate placed on the ground projected from the floor of the building, and these are integrally formed. It is a foundation made of reinforced concrete. Conventionally, such cloth foundations and solid foundations have a so-called root cutting process in which the ground is dug to a predetermined depth, a crushed stone rolling process in which crushed stones are spread and solidified, and concrete is placed on the crushed stones to form a predetermined horizontal surface. Leveling concrete casting process to form, formwork installation process to form the rising part of fabric foundation and solid foundation, rebar assembly process to connect reinforcing bars, concrete casting process to cast concrete into the bottom plate of formwork and solid foundation It is constructed by a mold removal process for removing the mold after the concrete is solidified. Therefore, there are many work processes and construction requires a large amount of cost.

JP 2007-32449 A Patent No. 3662207

  Patent Document 1 describes a base material made of precast concrete, which is manufactured in advance in a factory and forms a fabric foundation when connected to each other at a construction site. More specifically, the base material 50 described in Patent Document 1 is a plate-like column in which reinforcing bars 52, 52,... Are embedded, as partly shown in FIG. And a footing 53 formed integrally with the lower end of the support column so that the cross-sectional shape is inverted T-shaped. The mating surface 54 of the one base material 50 formed in this way is provided with a male joint rail 58 having a convex portion 57 of a predetermined size, and the other base material 50 the mating surface 55 has the convex portion. A female joint rail 61 having a recess 60 slightly larger than 57 is provided. Therefore, when the convex portion 57 of the male joint rail 58 is inserted and slid into the concave portion 57 of the female joint rail 61, the two base members 50 and 50 are connected to each other with a predetermined play. . A state in which the gaps d1 'and d2' are formed in the two base members 50 and 50 connected to each other is shown in a partial cross-sectional view of FIG. A predetermined portion of the male joint rail 58 is provided with a plurality of semicircular first grooves 63, 63,... Across the rail 58. .. Are also provided with semicircular second grooves 64, 64,... That are paired with the first grooves 63, 63,..., And the male joint rail 58 and the female joint rail 61 are connected. As shown in FIG. 5A, a conical tapered hole 66 is formed by the first groove 63 and the second groove 64. When a tapered pin 68 is driven into this tapered hole 66, the diameter of the tapered hole 66 is expanded, and as shown in FIG. 5C, the gap d1 ′ disappears and there is no play. The rail 58 and the female joint rail 61 are fastened together.

  Patent Document 2 includes a base material having a predetermined length that forms a part of the rising of a foundation, which is manufactured in advance in a factory, and a frame body block having a hollow frame structure that connects such a plurality of foundation materials. A foundation made from precast concrete is described. These can be assembled as follows. That is, in a construction site, a plurality of foundation materials are arranged at predetermined intervals, and a frame block is inserted between two adjacent foundation materials. Next, concrete is placed on the frame block and filled with concrete. Since the end face of the frame block that is in contact with the foundation material is open, the foundation material and the frame block are integrated by the placed concrete to form a rising portion of the foundation. In addition, when placing concrete in the frame block, the foundation material and the frame block are preliminarily set in advance so that the foundation material and the frame block are not spread apart by the weight of the cast concrete. It is necessary to connect and fix with metal parts. The bottom of the foundation is obtained by placing concrete as is well known in the art.

  Even with the base material 50 described in Patent Document 1, there is no need to install a formwork at the construction site, and there is no concrete placing work for forming a fabric foundation, so there are few work steps and the construction cost is low. . However, problems to be solved are also recognized. For example, the base material 50 is connected only by the male and female joint rails 58 and 61 of the end surfaces, that is, the abutting surfaces 54 and 55, and the footing 53 is not connected. Accordingly, all external forces applied to the foundation from the building or the ground act on the male and female joint rails 58 and 61, and the male and female joint rails 58 and 61 have a length equal to the height of the foundation material 50 in order to obtain the required strength. That is, it is necessary to provide the entire length of the abutting surfaces 54 and 55, which is expensive. Further, since the male and female joint rails 58 and 61 are fixed by driving the taper pins 68, 68,..., There is a problem that the length of the entire fabric foundation cannot be finely adjusted. In other words, the construction accuracy of the fabric foundation is required at the construction site, but the distance between the adjacent foundation materials 50 and 50 is fixed and cannot be finely adjusted, so the length of the entire fabric foundation is fixed. Therefore, the construction accuracy of the fabric foundation depends on the dimensional accuracy of the foundation materials 50, 50,. When the taper pins 68, 68,... Are driven, the bottom surfaces of the plurality of base members 50, 50,..., That is, the bottom surfaces of the footings 53, 53,. Become. Therefore, if the leveling accuracy of the leveled concrete on which the foundation materials 50, 50,... Are placed is low, some of the foundation materials 50, 50 are lifted up, and an excessive load is applied to the leveled concrete. In some cases, the rails 58 and 61 and the taper pins 68, 68,... Further, the taper pins 68, 68,... Are loosened by vibrations and easily come off. Furthermore, although the foundation material 50 described in Patent Document 1 is for forming a cloth foundation, the cloth foundation itself may cause so-called non-uniform subsidence. There is also a problem that it is difficult.

  The foundation made of precast concrete described in Patent Document 2 is not clearly described as being applied to either a fabric foundation or a solid foundation, but the figure in the literature seems to apply to a fabric foundation. Is estimated. However, the foundation made of the precast concrete described in Patent Document 2 is configured so that the foundation is formed by being integrated with the concrete placed on the bottom so that the bottom becomes the bottom plate of the solid foundation. If concrete is cast, it can be applied to solid foundations. A solid foundation can be used even on relatively soft ground that is unlikely to cause uneven settlement, and a solid foundation can be obtained. However, problems to be solved are also recognized. For example, the base material and the frame block need to be connected to each other by a predetermined metal fitting so as not to be separated when concrete is placed on the frame block, and the work process is complicated and troublesome. Also, when the concrete is placed on the frame block, if the gap between the foundation material and the frame block is wide, the concrete will leak out. The work such as sealing with another mold so as to close the gap between the blocks is necessary, and the work is complicated. Moreover, the concrete placement itself on the frame block is complicated. There is also a problem with the work of adjusting the height of the base material and the frame block. It is necessary to adjust the foundation material and the frame block to the same height so that the height of the rising part of the solid foundation is uniform, but the work efficiency is poor because the height must be adjusted individually. .

  Therefore, the present invention aims to provide a block foundation capable of constructing a solid solid foundation, which is difficult to sink even in soft ground, with high work efficiency. Specifically, it is necessary while being inexpensive. The strength is obtained, the length can be finely adjusted when connecting to each other, and even if the leveling accuracy of the leveled concrete is insufficient, the block does not float up or overload is applied to the connecting part, so it is a special block It is an object of the present invention to provide a precast concrete foundation material and a method for joining the foundation material, which do not require metal fittings to connect each other and can work efficiently, and can also efficiently adjust the height of the block.

  In order to achieve the above object, the present invention comprises blocks or base materials formed in advance to a predetermined length, and when these base materials are connected to each other at the abutting end faces or side surfaces, the walls and pillars of the building are formed. It is configured such that a rising portion of the solid base to be supported is formed. In particular, according to the present invention, in order to achieve the above object, a joint rail is provided on the butt end surface of the base material or a side surface near the end surface, and a part of the reinforcing bar embedded in the base material is provided on the bottom surface. It is configured to be exposed for a predetermined length. The plurality of base materials are temporarily joined by fitting the joint rails with a predetermined gap. Therefore, when the grout material is injected into the predetermined gap between the joint rails that are temporarily joined, and the grout material is solidified, the adjacent base materials are connected. Further, when concrete is placed by connecting the exposed reinforcing bars of a predetermined length to the bottom reinforcing bars embedded in the bottom plate, a solid foundation in which the rising portion and the bottom plate are integrated is obtained.

  Thus, in order to achieve the above object, the invention according to claim 1 is composed of a base material having a predetermined length, and when these base materials are connected to each other at the abutting end faces or side surfaces, the walls and pillars of the building are formed. The base material is configured to form a rising portion of a solid foundation to be supported, and a joint rail having a predetermined length is provided on a butt end surface or a side surface of the base material, The joint rails are temporarily joined to each other with a gap, and from the bottom surface of the foundation material, a part of the reinforcing bars embedded in the foundation material are externally provided by a predetermined length. It is configured to be exposed to

  According to a second aspect of the present invention, in the foundation material according to the first aspect, the joint rail is arranged such that when the foundation material is coupled, the height of the foundation material to be coupled is aligned. The invention according to claim 1 is the base material according to claim 1 or 2, wherein a shear cotter into which a grout material is injected is provided at a predetermined position below the joint rail of the base material. The base material according to any one of claims 1 to 3, wherein the joint rail is fitted into a female joint rail provided with a predetermined concave portion and a concave portion of the female joint rail. The base material includes a female base material provided with the female joint rail and a male base material provided with the male joint rail. So as configured. According to a fifth aspect of the present invention, in the base material according to the fourth aspect, a height adjusting bracket is provided on the bottom surface of the female base material. The invention according to claim 6 is the foundation material according to any one of claims 1 to 5, wherein the foundation material is a stand-alone foundation that is used independently of the foundation material provided with the joint rail. The base material is manufactured in advance in a factory, and the invention according to claim 7 is the base material according to claim 4 or 5, wherein the base material is further independent. Including the independent base material used, the male base material and the independent base material are pre-manufactured in a factory with standardized shapes, and the female base material depends on the shape of the solid base To be appropriately manufactured.

  The invention according to claim 8 includes a plurality of female base materials each having a first joint rail provided on a butt end surface or a side surface, and a second fitting member that fits the first joint rail on a butt end surface. A plurality of male foundation members provided with joint rails are connected to form a solid foundation rising portion, and the plurality of female foundation members are leveled on a predetermined concrete. The male base material is fitted between the first joint rail and the second joint rail between an arrangement step of arranging the gap and the female base material arranged by the arrangement step. A temporary connecting step of inserting the plurality of female base materials and the male base material from above and temporarily connecting the reinforcing bars protruding from the bottom surfaces of the female base material and the male base material; A lacing process coupled to the Composed of a grout injection step of injecting grout into connecting portions of the female basic material and the male basic material which is connected by a connecting. According to a ninth aspect of the present invention, in the method according to the eighth aspect, the grout material is also applied to a shear cotter formed in the vicinity of the first and second joint rails during the grout material injection step. Configured to inject.

  As described above, according to the present invention, the foundation material made of precast concrete is configured as a foundation material for forming the rising portion of the solid foundation, so that it is a solid solid foundation that does not easily sink even on soft ground. Can be obtained at low cost. A joint rail having a predetermined length is provided on the end face of the base material or a side surface near the end face, and the base material is temporarily joined with each joint rail having a predetermined play or gap. Therefore, it is very easy to connect or assemble at the construction site, and the gap between the joint rails can be adjusted so that the total length of the rising portion to be connected is accurate. A unique effect is obtained. Further, since the base material is temporarily bonded with a gap, the grout material can be injected into the gap. Thereby, the effect which can connect a base material firmly is also acquired. Furthermore, since a part of the rebar embedded inside is exposed for a predetermined length on the bottom surface of the base material, the exposed rebar is combined with the bottom rebar embedded in the bottom plate, and the concrete is When it is placed, there is also an effect that a solid solid foundation in which the rising portion and the bottom plate are integrated is obtained. According to another invention, the joint rail is configured such that when the base material is connected, the height of the base material to be connected is aligned, so if the height of the base material is adjusted every other piece, The base material inserted between two base materials whose heights are adjusted is automatically adjusted in height. Therefore, a solid foundation can be constructed at low cost with excellent work efficiency. According to another invention, the base material comprises a female base material provided with a female joint rail and a male base material provided with a male joint rail. Since the height adjusting bracket is provided, the working efficiency is further improved. According to another invention, the base material is composed of a female base material, a male base material, and an independent base material, and the male base material and the independent base material are pre-manufactured in a factory. Therefore, it can be produced and stocked in large quantities, and the basic material can be provided at a lower cost.

  Embodiments of the present invention will be described below. The base material according to the present embodiment is precast concrete manufactured in advance in a factory, and includes a female base material 1, a male base material 2, and an independent base material 3. The female base material 1 and the male base material 2 are joined to each other so as to form a solid base rising portion, but the independent base material 3 is not joined to other base materials and is independent. As a base material, a rising part of a solid foundation is formed. The female base material 1 is shown in FIG. 1A, the male base material 2 is shown in FIG. 1A, and the independent base material 3 is shown in FIG. Each of the female mold 1, the male mold 2 and the independent base material 3 is formed in a plate shape having a predetermined length and a predetermined thickness, and is placed at the construction site and the upper surfaces 4 and 4 that support the pillars and walls of the building. .., And end surfaces 7, 7 are integrated with the bottom plate of the solid foundation. One end surface 7 of the female base material 1 is a butted end surface 7 to which the male base material 2 is joined, but a side surface 6 in the vicinity of the other end surface 7 is a surface to which the male base material 2 is butted. It has become. On the other hand, both end surfaces of the male base material 2 are butt end surfaces 7 and 7. The male base material 2 has only a few types of widths, that is, lengths of the foundations, and the embedded position of the joint rail for connection is located at a predetermined position of the butted end surfaces 7 and 7 and does not move, and there are few types. . Similarly, the independent base material 3 has only a few types and a few types. Accordingly, the male base material 2 and the independent base material 3 are produced and stocked in large quantities in advance as standardized standard products. On the other hand, the length of the female base material 1 varies depending on the shape of the rising portion of the foundation to be constructed, and the embedment position of the joint rail for connection is also different, so there are many types. Therefore, a limited type of the female base material 1 can be standardized and stocked as a standard product, but the others are produced on order.

  In the female base material 1, the male base material 2, and the independent base material 3, reinforcing bars 10, 10 ', ... are embedded in a lattice shape in the vertical direction and the horizontal direction. ,... Are exposed by protruding downward from the bottom surfaces 5 and 5 of the male, female and independent base materials 1, 2 and 3 by a predetermined length. The protruding reinforcing bars 11, 11,... Are bent in an L shape, and are connected to the bottom reinforcing bar when the solid foundation is constructed, and are embedded in the concrete of the bottom plate of the solid foundation.

  Female joint rails 13 and 13 made of metal such as steel are provided on the side face 6 in the vicinity of one butted end face 7 and the other end face 7 of the female base material 1. In the embodiment shown in FIG. 1A, these female joint rails 13 and 13 are located above the abutting end surfaces 7 and 7 of the female base material 1, and the height of the base material 1 is high. Shorter than that. The specific structure of such female joint rails 13 and 13 is shown in the sectional view of FIG. That is, the female joint rail 13 is configured to form a box shape having a substantially square cross section from the pair of side walls 13a, 13a, the bottom wall 13b, and the front wall 13c. Groove-shaped slits 15 are formed on the front wall 13c in the longitudinal direction or the vertical direction. The upper surfaces 4 and 4 of the male and female base members 2 and 1 can be aligned by inserting the slit 15 until the lower end of the constricted portion of the male joint rail described later comes into contact with the lower end of the slit 15. Become. Such female joint rails 13, 13 are welded to the reinforcing bars 10, 10 ′ or fixed with a predetermined anchor bar so that the front wall 13 c is flush with the butted end surface 7 and from the bottom surface 5. It is embedded in the female base material 1 so as to be positioned at a predetermined height. In the upper surface 4 of the female base material 1, a hollow portion 18 is opened in a portion above the female joint rails 13 and 13. Thereby, the upper parts of the female joint rails 13 and 13 are exposed. Below the male joint rails 13 and 13, shear cotters 20 and 20 having a predetermined depth are opened from the bottom surface 5 to a predetermined height. The grout material injected from the cut-out portion 18 is also filled in the shear cotters 20 and 20.

  In the female base material 1 shown in FIG. 1, one female joint rail 13 is provided on the butt end surface 7, and the other female joint rail 13 is provided on the side surface 6. As shown, the female base material is provided with the female joint rail 13 at an arbitrary position in accordance with the shape of the rising portion of the base. Height adjustment fittings 22 and 22 are provided on the bottom surface 5 of the female base material 1 so that the height can be easily adjusted during the construction of the solid foundation.

  As shown in FIG. 2A, the butt end surfaces 7 and 7 of the male base material 2 are provided with grout injection grooves 25 and 25 having a predetermined depth in the longitudinal direction or the longitudinal direction. The male joint rails 27 and 27 are provided in a shape corresponding to the grout injection grooves 25 and 25. These male joint rails 27 and 27 are made of metal such as steel, and are substantially equal to the length of the female joint rail 13 described above. The male joint rail 27 includes a plate-shaped base portion 28, a constricted portion 29 standing up to a predetermined height from the base portion 28, and a head portion having a substantially square cross-sectional shape integrally formed with the constricted portion 29. 31 is formed into a shape like a railroad track. The constricted portion 29 of the male joint rail 27 is thinner than the slit portion 15 of the female joint rail 13. The head 31 is sufficiently smaller than the recess 17. Therefore, when the female and male base materials 1 and 2 are connected, the male joint rail 27 is fitted to the female joint rail 13 with play or with a gap. As a result, assembly or connection is facilitated and grout material can be injected.

  The base portion 28 of the male joint rails 27, 27 is welded to the reinforcing bars 10, 10,... Or fixed with a predetermined anchor bar, and is positioned at a predetermined height from the bottom surface 5. Is embedded in the male base material 2. Accordingly, the constricted portion 29 and the head portion 31 protrude outward from the butted end surfaces 7 and 7. Also in the lower part of the male joint rails 27, 27, shear cotters 33, 33 having a predetermined depth are opened at a predetermined height from the bottom surface 5.

  Since the independent foundation 3 is not connected to other foundation materials, a joint rail is not provided. The bottom surface 5 of the independent foundation 3 is provided with height adjusting brackets 22 and 22 so that the height can be easily adjusted when the solid foundation is constructed.

  Next, a method for constructing a solid foundation using the female, male, and independent foundation materials 1, 2, and 3 according to the present embodiment will be described with reference to FIG. In a construction site, as is conventionally known, root cutting is performed to dig a predetermined range of ground to a predetermined depth. Next, rolling work is performed in which crushed stones are laid down on the ground ground and pressed with a ramma. Concrete is placed on the crushed crushed stone layer 36 to form a leveled concrete 37 having a predetermined thickness with a predetermined horizontal accuracy. After the leveled concrete 37 is solidified, the female base materials 1, 1,... According to the present embodiment are arranged at a predetermined interval apart from each other at the rising portion of the solid foundation. This interval is equal to or slightly wider than the width of the male base material 2 and is adjusted so that the total length of the rising portion of the solid base finally obtained is accurate. When the level accuracy of the upper surface of the leveled concrete 37 is high, the upper surfaces 4, 4,... Of the female base materials 1, 1,... Placed on the leveled concrete 37 are positioned on the same horizontal plane. However, if the horizontal accuracy is not sufficient, fine adjustment of the height is performed using the height adjusting brackets 22 and 22 or appropriate spacers.

  Next, the male base material 2 is inserted from above between the adjacent female base materials 1 and 1. The constricted portion 29 of the male joint rail 27 passes through the slit portion 16, and the head portion 31 is guided and inserted into the concave portion 17. FIG. 3A shows a leveled concrete 37 having a predetermined thickness placed on the crushed crushed stone layer 36 and a female foundation arranged on the leveled concrete 37 at a predetermined interval. The materials 1 and 1 and the male base material 2 inserted between the female base materials 1 and 1 are shown. When the male base material 2 is inserted between the female base materials 1 and 1, the male joint rails 27 and 27 of the male base material 2 are guided to the female joint rails 13 and 13. The female base materials 1 and 1 and the male base material 2 are temporarily connected. When temporarily connected, the lower end portion of the constricted portion 29 comes into contact with the lower end portion of the slit portion 16. Thereby, the upper surfaces 4 and 4 of the female base material 1 and the male base material 2 become the same surface. The state in which the female mold and the male mold base materials 1 and 2 are temporarily connected is shown in the sectional view of FIG. The recess 17 of the female joint rail 13 is slightly larger than the head 31 of the male joint rail 27. Accordingly, the female and male joint rails 13 and 27 are temporarily connected with a predetermined gap, that is, play, and the butted end surfaces 7 and 7 of the female and male base materials 1 and 2 may be in close contact with each other. However, a slight gap d may occur.

  The independent foundations 3, 3,... Are arranged where necessary. The state in which the independent foundations 3, 3,... Are arranged is not shown in the figure. When the leveling accuracy of the upper surface of the leveled concrete 37 is high, the positions of the upper surfaces 4, 4,... Of the independent base materials 3, 3,. However, if the horizontal accuracy is not sufficient, fine adjustment of the height is performed using the height adjusting brackets 22 and 22 or appropriate spacers.

  Using so-called joint dummies, etc., as shown in FIG. 3A, bottom reinforcing bars 39, 39,... Are connected to each other. The L-shaped reinforcing bars 11, 11,... Protruding from the bottom surfaces 5, 5 of the female, male, and independent base materials 1, 2, 3 are also connected to the bottom reinforcing bars 39, 39,. A grout material is injected from the cut-out portion 18 into the portion indicated by the arrow Y in FIG. Then, the grout material is injected into the gap between the recess 17 of the female joint rail 13 and the head 31 of the male joint rail 27, the grout injection groove 25, and the shear cotters 20 and 33. A state in which the grout material 41 is injected into the gap between the recess 17 and the head 31 and the grout injection groove 25 is shown in the sectional view of FIG. Since the gap d between the butted end surfaces 7 and 7 of the female mold and the male mold base materials 1 and 2 is not large, the grout material 41 is difficult to leak to the outside from the gap d, but when the grout material 41 is poured in advance, It is preferable that a leak-proof seal is applied. When the grout material is solidified, the female and male base materials 1 and 2 are integrated to withstand the shearing force in the lateral direction and the vertical direction. Concrete is cast to form the bottom plate 43. When the grout material 41 and the concrete are solidified, a solid solid foundation in which the bottom plate 43 and the rising portion are integrated is obtained.

  The female mold and the male mold base materials 1 and 2 according to the present invention can be implemented in various forms without being limited to the above embodiment. For example, the cross-sectional shapes of the female and male joint rails 13 and 27 are not limited to the shapes described above. For example, the cross-sectional shape of the head 31 of the male joint rail may be a circle, a triangle, or the like. It is also clear that the present invention can be carried out using ant-groove female and male joint rails. Furthermore, although it has been described that the joint rail is composed of two types of male type and female type, it can also be implemented with one type of joint rail. FIG. 4A shows a partial cross-section of the base material 1 ′ on which the joint rail 45 without distinction between male and female is provided. As those skilled in the art can easily understand, components similar to those of the female mold and male mold base materials 1 and 2 according to the above-described embodiment are denoted by the same reference numeral with a dash “′”. No duplicate explanation. The cross-sectional shape of the joint rail 45 has a bowl shape, and is fitted with other joint rails 45 having the same shape with play. Accordingly, as shown in FIG. 4 (a), even two basic materials 1 ′ and 1 ′ without distinction between a female type and a male type can be temporarily connected to each other, and the grout material 41 ′ When injected, it is firmly connected.

  Furthermore, although the male base material 2 according to the present embodiment has been described as having a plurality of standardized types, it is obvious that even one type can be implemented in the same manner. The base material to be converted into the male base material 1 can be similarly implemented even if the male base material 1 is manufactured and stocked at the factory and the male base material 2 is produced on order. Although the male base material 2 is described as not being provided with the height adjusting bracket 22, a predetermined bracket for supporting the male base material 2 may be provided at the bottom. In this way, the load of the male base material 2 is distributed not only to the female and male joint rails 13 and 27 but also to the metal fittings. Although the female and male joint rails 13 and 27 are described as having substantially the same length, even if they are different, they can be fitted to each other by appropriately providing a stopper or the like at a predetermined position in the joint rail. When combined, the heights of the female mold and the male mold base materials 1 and 2 are aligned. It is clear that the joint rail can be implemented even if it has a length equal to the height of the base material. Furthermore, although the female mold and the male joint rail have been described as being embedded in concrete in advance, the present invention can be similarly implemented even if they are attached to the manufactured precast concrete with insert bolts or the like. Moreover, the metal fittings 22 and 22 for height adjustment can also be made into a member different from a base material. For example, it can also be adjusted by a height adjusting bracket or plate separate from the base material.

  The female-type, male-type, and independent-type foundation materials 1, 2, and 3 according to the present embodiment can be used for the construction of cloth foundations by placing concrete as a footing on the bottom surfaces 6 and 6.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the base material which concerns on this Embodiment typically, The (a) is a female-type base material, The (a) is a male-type base material, The (c) is an independent type base material, respectively. It is a perspective view shown. It is sectional drawing which shows the state with which the base material which concerns on this Embodiment is connected, The (a) is the female joint rail vicinity of a female base material, The (a) is a male joint rail of a male base material. In the vicinity, (C) shows the state where the joint rails of the female and male base materials are fitted, and (D) shows that the grout material is injected into the fitted joint rail and the grout injection groove. FIG. 5 is a partial cross-sectional view showing a state in which the female mold and the male mold base material are connected to each other. It is a figure for demonstrating the method of constructing a solid foundation using the foundation material which concerns on this Embodiment, The (a) and (b) are perspective views which show each construction step typically. It is sectional drawing which shows the base material which concerns on other embodiment of this invention, The (a) is the joint rail vicinity of a base material, The (a) is two base materials, and a joint rail is fitted. It is a partial sectional view showing a state where a grout material is poured and connected together. It is a figure which shows a prior art example, The (a) is a perspective view which shows a base material typically, The (a), (c) is a partial sectional view which shows each step in which the base materials are mutually connected. is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Female base material 2 Male base material 3 Independent type base material 4 Upper surface 6 Side surface 7 End surface
10, 11 Rebar 13 Female joint rail 15 Slit (groove)
17 Concave portion 20 Shear cotter 22 Height adjustment bracket 27 Male joint rail 29 Constricted portion 31 Head 33 Shacotta 36 Crushing layer 37 Leveling concrete 39 Bottom rebar 41 Grout material 43 Bottom plate

Claims (9)

A foundation material that consists of foundation materials of a predetermined length, and when these foundation materials are connected to each other at the abutting end faces or side surfaces, a solid foundation rising part that supports the walls and pillars of the building is formed. Because
A joint rail of a predetermined length is provided on the end face or side surface of the base material,
The base material is designed to be temporarily coupled to each other with a gap by the joint rail,
A precast concrete foundation material, wherein a part of a reinforcing bar embedded in the foundation material is exposed to the outside by a predetermined length from the bottom surface of the foundation material. The foundation material according to claim 1, wherein when the foundation material is connected, the joint rail is configured such that the height of the foundation material to be connected is uniform. . The foundation material according to claim 1 or 2, wherein a shear cotter into which a grout material is injected is provided at a predetermined position below the joint rail of the foundation material. . The base material according to any one of claims 1 to 3, wherein the joint rail includes a female joint rail provided with a predetermined concave portion and a convex portion that fits into the concave portion of the female joint rail. Consisting of a male joint rail with
The foundation material made of precast concrete, wherein the foundation material comprises a female foundation material provided with the female joint rail and a male foundation material provided with the male joint rail. The base material according to claim 4, wherein a height adjusting bracket is provided on a bottom surface of the female base material. The base material according to any one of claims 1 to 5, wherein the base material includes a base material provided with the joint rail and an independent base material used independently. Precast concrete foundation material, characterized in that the material is pre-manufactured in a factory. The base material according to claim 4 or 5, wherein the base material further includes an independent base material used independently, and the male base material and the independent base material have a standardized shape. A precast concrete base material, which is manufactured in advance in a factory, and the female base material is appropriately manufactured according to the shape of the rising portion of the solid base. A plurality of female base materials (1, 1,...) Provided with a first joint rail (13) on the butt end face (7) or side face (6), and similarly on the butt end face (7, 7). A rising portion of a solid foundation by connecting a plurality of male base materials (2, 2,...) Provided with a second joint rail (27) to be fitted to the first joint rail (13). A method of forming
An arranging step of arranging the plurality of female base materials (1, 1,...) On the leveled concrete (37) at a predetermined interval;
The male joint material is fitted into the first joint rail (13) with the second joint rail (27) between the female base materials (1, 1,...) Arranged by the arranging step. Temporary connection for temporarily connecting the plurality of female base materials (1, 1,...) And the male base materials (2, 2,...) By inserting the base materials (2, 2,...) From above. Process,
Reinforcing bars (11, 11,...) Protruding from the bottom surfaces of the female base material (1, 1,...) And the male base material (2, 2,...) And bottom reinforcing bars (39, 39,...) The lacing process to connect;
It comprises a grout material injecting step of injecting a grout material (41) into the connecting portion of the female base material (1, 1,...) And the male base material (2, 2,...) Connected by the temporary connection. , Precast concrete foundation material connection method. 9. The method according to claim 8, wherein a shear cotter (20, 33,...) Formed in the vicinity where the first and second joint rails (13, 27) are provided in the grout material injection step. A method of connecting precast concrete foundation materials into which grout material is injected.

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