JP4299864B2 - Grout formwork for building column base and installation method - Google Patents

Description

  The present invention relates to a grout form for a building column base used for filling a grout material to form a connection support layer for a column base portion that joins the foundation of a building and a steel column, and a method for installing the same.

As disclosed in the following patent documents, the column base of the building is connected to the upper end of the anchor bolt embedded in the foundation concrete in order to transmit the building stress to the foundation via the steel column. It protrudes on the ground and is connected to a base plate provided on the lower end side of the steel column. In addition, since the top surface of the foundation concrete that is cast in the field tends to be uneven and uneven, a certain gap is provided in advance between the bottom surface of the base plate, and a grout formwork is installed around the outside of this gap. In order to maintain the lower surface of the base plate at a horizontal level and to be in close contact with the upper surface of the foundation concrete, the connecting support layer is provided.
JP 2000-17729 A JP 2000-291018 A JP 2001-311219 A Registered Utility Model No. 3029343 Japanese Patent No. 2652111

  For example, in the case of Patent Document 1, a conventional grout mold and its installation method use a strip-shaped paper material formed in a rectangular frame shape as a mold material, and the mold material is directed outward from the lower side of each side. The flange portion is bent and an interval setting convex portion is provided inside each side. In the grout formwork and its installation method of Patent Document 1, since a strip-shaped paper material is used for the formwork material, the formwork material is inexpensive and the construction cost can be reduced. The effect that the distance between the base plate of the column and the formwork can be kept constant can be expected.

  In the case of Patent Document 2, a plate-like crosspiece or the like is used as a formwork material, connecting members having a U-shaped cross section are arranged at four corners, and both ends of each crosspiece are fitted between adjacent connecting members. Together, they are connected in the form of a square frame, and the heads of the anchor bolts that connect the base plate and the corners of the mold frame are latched and held by spring members. In the grout formwork and its installation method of Patent Document 2, it is possible to easily connect a plate-like pier with a connecting member, and to prevent the formwork from being bent when a grout material is injected with a holding spring member. Can be expected.

  In the case of Patent Document 3, a strip-shaped steel plate or the like is used as a mold material, and a bulging shape portion that bulges outward from the frame is provided in a part to form a rectangular frame shape. Temporarily fixed to the base plate of a steel column. With the grout formwork and its installation method of Patent Document 3, it is possible to expect the effects that assembly work at the construction site is unnecessary and that the formwork can be installed without being displaced with respect to the base plate.

  In the case of Patent Document 4, a strip-shaped plate material provided with notched fitting grooves on both ends is used as a mold material, and adjacent strip-shaped plate materials are connected to each other via a fitting groove to form a cross-beam shape. is doing. With the grout formwork and the installation method of Patent Document 4, it is possible to expect effects such as that the formwork material is inexpensive and easy to assemble.

  In the case of Patent Document 5, it is a mold for constructing a reinforcing bar or a reinforcing steel / steel-concrete prism, which has a different purpose from Patent Documents 1 to 4, but is bent into an L shape or a U shape. The formwork material is formed in a rectangular cross section using a translucent and hollow plastic corrugated cardboard material, and the outer periphery of the formwork material is constrained by a column clamp arranged in a hook shape. In the grout formwork and its installation method of Patent Document 5, it is lightweight because it is hollow, the surface is smooth and has good peelability, it can be reused repeatedly, and it is translucent and has a filling amount of grout material. Effects such as being visible from the outside can be expected.

  In the conventional grout formwork including these patent documents and the installation method thereof, for example, in the case of Patent Document 1, since a strip-shaped paper material is used for the formwork material, when a grout material such as a non-shrink mortar is filled. It absorbs moisture in the grout material and becomes brittle, it may bend and deform outward due to internal pressure, and the function as a mold may be impaired, and the grout material adheres to the inner surface of the mold, making it difficult to demold Problems such as being unable to be reused over and over again, especially if there is a flange, and if there is unevenness (unevenness) or rising reinforcing bars on the top surface of the foundation concrete where the formwork is installed, there were.

  In the case of Patent Document 2, since the shape of the connecting member is complicated and not easy to process and is expensive, and a plate-like pier is used as the formwork material, the foundation concrete for installing the formwork is used. There were problems such as being unable to install if there were unevenness (unevenness) or rising reinforcing bars on the upper surface, and it was difficult to confirm the amount of grout filling from the outside.

  In the case of Patent Document 3, since a strip-shaped steel plate is used to integrally form a rectangular frame shape including a bulging shape portion, the processing of the mold is not easy and expensive, and the mold is installed. Issues such as large unevenness (unevenness) on the upper surface of the foundation concrete, rising reinforcing bars, etc., which cannot be handled by the elastic seal member, and cannot be diverted to other connected support layers with different base plate outer diameters was there.

  In addition, in the case of Patent Document 4, since a strip-shaped plate material is used as a formwork material, it cannot be installed if there is unevenness (unevenness) or rising reinforcing bars on the upper surface of the foundation concrete on which the formwork is installed, There are problems such as difficulty in confirming the filling amount of the grout material from the outside and diversion to other connected support layers having different outer diameters of the base plate.

  Further, in the case of Patent Document 5, the hollow portions partitioned by the partition pieces (reinforcing strips) are arranged side by side in a manner extending in the vertical direction, and a plastic cardboard material is used as a formwork material. Therefore, bending deformation can be reduced in the longitudinal direction, which is the vertical direction, but bending deformation is likely to occur in the lateral direction, which is the horizontal direction. It was necessary to place and restrain a large number of column clamps in the shape of an eagle, and could not be adopted for the grout formwork to be implemented in this case.

  That is, in the case of the grout formwork to be implemented in this case, the gap between the top surface of the foundation concrete is connected to the anchor bolt and surrounds the base plate of the steel column already erected on the foundation concrete. In order to fill the grout material, it is necessary to use a strip-shaped formwork material in a horizontally long shape. Therefore, it is not possible to mount a column-shaped column clamp, and in particular, bending deformation in the horizontal direction which is the longitudinal direction. In order to reduce this, it is required to give the formwork material itself a certain strength or to fix the formwork on the foundation concrete.

  In the present invention, a grout formwork for a column base of a building that can solve the problems of the prior art and a method for installing the same are provided. Compared to the prior arts such as Patent Documents 1 to 4, the structure of the formwork is provided. Is easy and inexpensive to provide, can be easily re-used, can be reused repeatedly, and can handle uneven surfaces or raised reinforcing bars on the top surface of the foundation concrete where the formwork is installed The purpose is to be able to.

  In addition, it can be used for other connection support layers with different outer diameters and shapes of the base plate, adapted to connection support layers with different thicknesses, the amount of grout material can be checked from the outside, and grout material injection Provided is a grout formwork for a column base of a building that can be used in various forms, such as being able to be transferred to a formwork for filling level mortar performed before the construction, and a method for installing the same.

  Furthermore, as compared with the prior art such as Patent Document 5, the mold material itself can have a certain strength to reduce bending deformation in the horizontal direction, which is the longitudinal direction, and the mold can be placed on the foundation concrete. The purpose is to enable easy fixing.

  The grout formwork for a column base of a building according to the present invention uses one or a plurality of strip-shaped molds cut into a standard using a hollow plastic cardboard material in which a large number of partition wall pieces are joined between front and back double-sided plates. The end of the frame material is connected to form a mold body with a desired shape, and a plurality of mold attachment portions where the strip-shaped frame material overlaps are provided at appropriate positions outside the mold body. The main body and the formwork mounting part were designed to be installed on the foundation concrete in such a manner that each hollow part partitioned by the partition piece extends in the horizontal direction. (Claim 1)

  The grout formwork for the column base of a building according to claim 1, wherein the formwork body is formed in a polygonal shape or a circular shape including a square shape, and the formwork attachment portion is directed to the outside of the formwork body. Formed by the polymer piece connected in the above, or formed by the outer piece of the connection part connected in the state where the end of the mold body is overlapped, or the connection part connected in the state straddling the end of the mold body It is possible to take any form of forming with the installation piece. (Claim 2)

  A method for installing a grout formwork for a column base of a building according to the present invention is an installation method for a grout formwork for a column base of a building according to claim 1 or 2, wherein the formwork body is disposed on a foundation concrete. Then, a locking member such as a concrete nail that obliquely penetrates the partition wall piece was driven from the outside of the mold attachment portion and fixed on the foundation concrete. (Claim 3)

  The grout formwork for the column base of the building according to claim 3 may be configured such that the formwork mounting portion is provided with an introduction hole for a locking member that horizontally penetrates the overlapping piece, the outer piece, and the installation piece. (Claim 4)

  In the grout formwork for the column base of the building according to the first aspect of the invention, since a hollow plastic cardboard material such as polypropylene is used as the belt-like formwork material forming the formwork, processing such as cutting, bending and joining is performed. Is easy and can be formed into a desired formwork shape, and is lightweight and easy to handle during storage, transportation and installation.

  In addition, the corners that are cut and bent at right angles also have high tensile strength and are toughly connected, so that they can sufficiently withstand the lateral pressure caused by the grouting material, The grouting material cast in step 1 is not fragile and can be easily separated from the cast grouting material to obtain a good finished surface, so that it can be reused repeatedly.

  In particular, a strip-shaped formwork material that forms the formwork body and the formwork attachment part is installed on the foundation concrete in such a manner that the hollow parts partitioned by the partition pieces extend in the horizontal direction, and the bending deformation in the longitudinal direction is reduced. At the same time, the grout formwork can be reinforced by polymerizing the formwork attachment part on the outside of the formwork body.

  In the grout formwork for the column base of the building according to the invention of claim 2, the formwork body can be formed into a polygonal shape or a circular shape including a rectangular frame shape as desired, and the formwork The formwork attachment part to be attached to the outside of the main body in a polymerized state is formed of a polymerized piece that can be arbitrarily set the attachment position without being restricted by the connection part of the formwork main body, or is superposed by a short belt-like formwork material Various forms can be taken, such as omitting the piece and using it as the outer piece of the connecting portion, or forming the connecting portion as a construction piece.

  In the method for installing a grout formwork for a column base of a building according to the present invention of claim 3, with respect to the grout formwork of claim 1 or 2 installed on the foundation concrete, the partition piece is obliquely arranged from the outside of the formwork attachment portion. A locking member such as a concrete nail penetrating through can be driven in and the mold can be easily and firmly fixed to the basic concrete, and can be removed by pulling out the locking member.

  In addition, if the strength of the grouting material installed on the foundation concrete is insufficient for the lateral pressure of the grouting material, the hollow part of the strip-shaped framing material that forms the stencil body is reinforced with reinforcing bars or wires. It can reinforce by inserting the wire material for use, or by connecting the belt-like mold material forming the main body of the mold and the anchor bolt with a binding wire.

  In addition, when the rising reinforcing bar protruding on the foundation concrete interferes with the grout formwork, the belt formwork material of the formwork body is bent or the lower end side of the beltlike formwork material is cut to avoid the rising rebar. It is possible to install in a state avoiding by providing a notch.

  In addition, when the gap between the base plate of the steel frame and the upper surface of the foundation concrete is large, it is possible to adjust the height by adding another sheet to the upper part of the strip-shaped formwork, and the strip-shaped formwork is made of concrete. Since it does not adversely affect the properties, it can be buried in soil concrete without removing the formwork.

  In the method for installing a grout formwork for a column base of a building according to the present invention of claim 4, the formwork mounting part is provided with an introduction hole penetrating horizontally, and the formwork attachment part is made of concrete nails or the like through the introduction hole. If the locking member is driven in, the driving operation at the site can be performed easily and accurately even if it is not an expert.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a column base part of a building to be implemented, and FIG. 2 is an enlarged cross-sectional view of the main part of the column base part. FIG. 3 is an enlarged perspective view of the main part of a strip-shaped formwork material used as a base material for a grout formwork, and the upper end side is protruded above the ground by being embedded in a foundation concrete 1 as a foundation of a building. An anchor bolt 2 and a flange-like base plate 4 provided on the lower end side of a steel column 3 standing on the ground are connected by a fixing nut 5 that is screwed to the anchor bolt 2.

  Since the steel column 3 at the column base cannot be erected vertically when the upper surface of the foundation concrete 1 is uneven, the steel pillar 3 is previously placed between the upper surface of the foundation concrete 1 and the lower surface of the base plate 4. A fixed gap is provided, and a grout frame 6 is installed around the outside of the gap and filled with a grout material to form a connection support layer 7. The upper surface of the foundation concrete 1 is leveled and the lower surface of the base plate 4 is leveled. The steel column 3 is vertically erected and is connected to the steel column 3 in a state where the base plate 4 is in close contact with the upper surface of the foundation concrete 1.

  The outline of the procedure for constructing the column base is that the leveling mortar 8 for leveling is raised with respect to the upper surface of the foundation concrete 1, the base plate 4 of the steel column 3 is placed with the upper surface of the level mortar 8 being the horizontal plane, After connecting the fixing bolt 5 to the upper end side of the anchor bolt 2, a grout mold 6 is installed in such a manner as to surround the outer periphery of the base plate 4, and the grout mold 6 is filled with a grout material such as non-shrink mortar. The connection support layer 7 is formed.

  In addition, after the grout material is consolidated, the grout formwork 6 is removed, and a formwork for soil concrete is installed in a wide area including the column base, and is embedded in the foundation concrete 1 in advance in this formwork. Then, the reinforcement is connected to a rising reinforcing bar (not shown) protruding from the upper end side of the foundation concrete 1 and the soil concrete is placed to a height at which the base plate 4 of the steel column 3 is embedded.

  As shown in FIG. 1, the grout form 6 is in a state in which a constant distance d is maintained with respect to the outer periphery of the base plate 4, and a grout material such as non-shrink mortar is placed in the grout form 6 via the distance d. As shown in FIG. 2, it is in a state where it is filled, or is in a state of being addressed to the outer periphery of the base plate 4. It is possible to take a form filled with grout material.

  In particular, in the grout mold 6 according to the present invention, a hollow plastic corrugated cardboard material is used as the band-shaped frame material 9, and this band-shaped frame material 9 is flexible, such as polypropylene, polycarbonate, or polyethylene. The front and back double-sided plates 9a and 9b are formed of a plastic sheet having high tensile strength and excellent water resistance, and a plurality of partition wall pieces 9c are joined between the double-sided plates, and the section of the cut surface is a straw-like hollow state Each hollow part 9d partitioned off is formed.

  The grout mold 6 connects the end portions of one or a plurality of strip-shaped mold materials 9 cut to a fixed size to form a mold body 10 in a desired mold shape, and at an appropriate position outside the mold body 10. Are provided with a plurality of mold attachment portions 11 where the strip-shaped mold material 9 is superposed, and the mold body 10 and the mold attachment portion 11 extend in a horizontal direction in which the partition piece 9c and the hollow portion 9d are longitudinal. It was made to install on the foundation concrete 1 by the aspect.

  The strip-shaped formwork material 9 is subjected to a bending process as necessary, and ends are connected by a joining means such as a staple or an adhesive to form a formwork body 10 having a desired formwork shape. The shape is formed in a rectangular frame shape as in the embodiment of FIG. 1, a polygonal shape such as a triangle, hexagon, or octagon, or a circular shape such as a true circle or an ellipse, etc., as necessary. It is possible to make it into an appropriate form shape including the embodiment.

  In particular, the strip-shaped frame material 9 using a hollow plastic corrugated cardboard material can be easily cut with a cutting tool such as a cutter, and when either one of the front and back double-sided plates 9a and 9b is cut, a rectangular shape is obtained. It can be easily bent into a rectangular frame shape, and the other bent part is held in a strong and strong connection with high tensile strength. Can be easily bent.

  In addition to being lightweight, the strip-shaped frame material 9 using a hollow plastic corrugated cardboard material can be stacked, so that it can be easily handled during storage and transportation. In the case of forming the mold attachment portion 11 with a small piece of the strip-shaped mold material 9 as in the embodiment, it can be made by using the end material of the strip-shaped mold material 9 on which the mold body 10 is formed. Economical.

  The grout form 6 cannot be inserted into the gap between the base plate 4 of the steel pillar 3 and the upper surface of the foundation concrete 1 in a state where the entire structure is in a series, so that at least one of the connecting portions is separated, and the steel frame After placing the base plate 4 of the pillar 3 on the upper surface of the foundation concrete 1 in a manner surrounding the base plate 4, the separated portions are connected by a joining means such as staples or adhesives.

  In addition, when the grout formwork 6 placed on the foundation concrete 1 has unevenness (unevenness) on the top surface of the foundation concrete 1, a gap is formed between the bottom face of the formwork body 10 and the inside of the formwork body 10. Since there is a risk that the filled grout material may leak, leakage of the grout material such as filling a caulking material such as early-strength mortar from the outside of the mold body 10 along the lower edge, or sticking an adhesive seal member, etc. Take measures to prevent this.

  Further, in order to counter the lateral pressure caused by the grout material filled in the mold body 10, the mold mounting portion 11 is fixed on the foundation concrete 1 with a locking member such as a concrete nail 12. The nail 12) is driven from the outside of the formwork attachment part 11 into the foundation concrete 1 so as to obliquely penetrate the partition piece 9c, and the position where the formwork attachment part 11 is provided conforms to the structure of the formwork body 10 and the like. To set.

  The concrete nail 12 can be driven by breaking through the back plate 9b without providing a special hole or the like, but is introduced to a pre-positioned mounting position for easy and accurate driving on site. It is desirable to make a hole 13, and the introduction hole 13 can sufficiently function to the extent that it horizontally penetrates the strip-shaped formwork material 9 of the formwork mounting part 11. 12 is retained by frictional resistance with the partition piece 9c.

  The grout form 6 installed on the foundation concrete 1 is a foundation concrete 1 in such a manner that a strip-like form member 9 made of a hollow plastic corrugated cardboard material extends in a horizontal direction in which the partition piece 9c and the hollow part 9d are longitudinal. Since it is difficult to bend by being installed on the top, and the superposed formwork mounting portion 11 also functions as a reinforcing plate, the formwork body 10 can be reinforced against lateral pressure.

  Further, when it is necessary to further reinforce the mold body 10 against the lateral pressure, it is possible to reinforce the mold body by inserting a reinforcing linear material such as a reinforcing bar or wire into the hollow portion 9d. That is, one end side of a binding wire such as a wire can be pierced and connected to the mold body 10, and the other end side of the binding wire can be entangled with the anchor bolt 2 and connected.

  In addition, a large number of rising reinforcing bars are projected on the foundation concrete 1, and the rising reinforcing bars may hinder the installation of the grout form 6, so means for avoiding interference with the rising reinforcing bars. As described above, it is possible to bend the strip-shaped mold material 9 of the mold body 10 or cut the lower end side of the strip-shaped mold material 9 to provide a notch, the base plate 4 of the steel column 3 and the basic concrete 1. If the gap between the upper surface and the upper surface of the belt-shaped mold member 9 is large, the height can be adjusted by adding another sheet to the upper part of the strip-shaped frame member 9 by connecting staples or the like.

  In this way, the grout mold 6 installed on the foundation concrete 1 is filled with a grout material such as a non-shrink mortar to form the connection support layer 7. When the grout form 6 is removed after the grout material is solidified by pulling out the concrete nail 12 which is a locking member, the gap between the connecting support layers 7 can be easily achieved. The grout form 6 can be removed by separating.

  In addition, the grout mold 6 can be made transparent so that the grout material can be visually checked and filled with an appropriate amount of grout material, the mold release surface can be easily separated and the grout mold 6 can be removed. It is easy, the outer periphery of the connection support layer 7 formed by releasing the mold can be made into a good finished surface, and the grout form 6 removed can be reused repeatedly.

  However, it is also possible to adopt a form in which the grout form 6 is not removed when placing the soil-concrete, but is buried in the soil-concrete, and in this case, a strip-shaped form using a hollow plastic cardboard material. The grout form 6 made of the material 9 does not deteriorate the properties of the concrete.

  Furthermore, if the outer diameter dimension of the grout formwork 6 can be adjusted so that it can be expanded and contracted, it can be shared when the outer diameter dimensions are different, thereby reducing the number of products, facilitating inventory management and reducing costs. At the same time, it can be used as a mold for level mortar.

  The grout mold 6 described above can form the mold body 10 and the mold mounting portion 11 in various forms by a strip-shaped mold material 9 using a hollow plastic corrugated cardboard material. A form of the mold 6 will be described as Examples 1 to 5 with reference to FIGS.

  4 to 7 show a grout mold 6A according to the first embodiment. FIG. 4 is a plan view of the grout mold 6A, FIG. 5 is a front view of the same, and FIG. 6 is an enlarged view of a portion X in FIG. A plan view (a) and a front view (b) are shown, and FIG. 7 shows an enlarged plan view (a), a front view (b) and a cross-sectional view (c) of the Y portion of FIG.

  The grout mold 6A is formed by forming a rectangular frame-shaped mold body 10A using two long belt-shaped mold materials 2, and is cut at a substantially middle portion of the long belt-shaped mold material 2. Provided and bent inward into an L shape, and the other end formed in a straight shape by bending one end to the outside is polymerized at the corner, and this overlapped part is stapled 14 or adhesive 10A of square frame-shaped form bodies are connected by joining means such as.

  In addition, on the outside of the mold body 10A, there are four mold attachment portions 11A using the short belt-like mold material 2, and each mold attachment portion 11A has four sides forming a rectangular frame shape. The short strip-shaped mold material 2 is polymerized at substantially the middle part, and this polymerized piece is integrally connected to the mold body 10A by a joining means such as a staple 14 or an adhesive, and penetrates each polymerized piece horizontally. An introduction hole 13 is provided, and a concrete nail 12 as a locking member is driven into the basic concrete 1 from the introduction hole 13 to fix the grout mold 6A.

  In the case of this grout formwork 6A, the formwork attachment part 11A is provided at a position different from the connection part of the formwork body 10A in particular, so that the formwork can be placed at any position that is not restricted by the connection part. 11 A of attachment parts can be provided and 10 A of formwork main bodies can be fixed to the foundation concrete 1, and since the formwork attachment part 11 A can be made using the end material of 10 A of formwork main bodies, it is very economical. There are advantages, such as.

  As a modification of this embodiment, it is also possible to form a rectangular frame-shaped mold body using one long belt-shaped mold material 2, in which case the middle of the belt-shaped mold material 2 Incisions are provided at three locations in the part and bent inward into an L shape, and the other end formed in a straight shape by bending one end outward is polymerized at one location in the corner. The superposed portions are connected by a joining means such as a staple 14 or an adhesive.

  FIG. 8 is a plan view of the grout mold 6B according to the second embodiment. The grout mold 6B is formed by forming a rectangular frame-shaped mold body 10B using four long belt-shaped mold materials 2. In addition, an incision is provided in a substantially middle portion of the long belt-shaped mold member 2 and bent inward in an L-shape, and one side end portion is connected to the other side end portion of the adjacent belt-shaped mold member 2 and four sides. Polymerization is performed almost at the center, and the superposed portions are connected by a joining means such as a staple or an adhesive to form a rectangular frame-shaped mold body 10B.

  In addition, the mold attachment portion 11B is formed by an outer piece superposed at substantially the center of the four sides, and the outer piece is integrally connected to the mold body 10B by a joining means such as a staple or an adhesive. Each outer piece is provided with an introduction hole penetrating horizontally, and a concrete nail 12 as a locking member is driven into the basic concrete 1 from this introduction hole, and the grout mold 6B is fixed.

  In the case of this grout formwork 6B, since the formwork attaching part 11B is formed by the connecting part of the formwork body 10B in particular, the formwork can be used without using the short belt-like formwork material 2 as in the first embodiment. Can be formed, and the formwork can be formed with the strip-shaped formwork material 2 shorter than in the case of the embodiment 1, especially when assembling the formwork at the construction site, handling in storage and transportation of materials. Has the advantage of being easy.

  FIG. 9 is a plan view of the grout mold 6C according to the third embodiment. The grout mold 6C uses four long belt-shaped mold materials 2 as in the case of the grout mold 6B in the second embodiment. Although the mold body 10C is formed in a rectangular frame shape, the difference from the case of the grout mold frame 6B is that it overlaps greatly at the position where the end of the adjacent belt-shaped mold material 2 is deviated from the center of the four sides. The polymerized portions are polymerized and connected to each other by a joining means such as a staple or an adhesive to form a rectangular frame.

  Further, as in the case of the grout mold 6A in the first embodiment, four mold attachment portions 11C using the short strip-shaped mold material 2 are provided at four locations outside the mold body 10C. The difference from the case of the mold 6A is that the mold attachment portion 11C is attached to the belt-like mold material 2 of the mold main body 10C located inside when superposed.

  In the case of the grout formwork 6C, the formwork main body 10C is expanded and contracted within the range where the ends of the adjacent band-shaped formwork materials 2 overlap, and the overlapped portion is stapled or adhesive in a state adjusted to a desired size. It is possible to form a rectangular frame by connecting them with a joining means such as the above, and there is an advantage that molds having different sizes can be shared without making them individually.

  As a modified example of this embodiment, a laterally long hole for sliding operation is provided in the strip-shaped frame member 2 of the mold body 10C positioned outside when superposed, and a pair of male and female is interposed through this laterally long hole. If it takes the form which connects between the inner strip | belt formwork material 2 superposed | polymerized with the fastener which can be attached and detached, it will slide within the range which the edge part of the adjacent strip | belt formwork material 2 overlaps, and a mold body 10C can be enlarged or reduced.

  FIG. 10 shows a plan view of the grout mold 6D according to the fourth embodiment, and the grout mold 6D is formed by forming a circular mold body 10D using three long belt-shaped mold materials 2, When both ends of the strip-shaped frame material 2 are bent outward to form a connecting piece, and the connecting pieces of the adjacent strip-shaped frame materials 2 are brought into a butted state and connected by a joining means such as a staple or an adhesive, A circular mold body 10D is formed by curving in an arc shape.

  Further, the mold attachment portion 11D is formed by a short belt-like mold material 2 superposed on the center of each of the belt-like mold materials 2 forming the mold body 10D, and this superposed piece is attached to the mold body 10D. On the other hand, they are integrally connected by a joining means such as a staple or an adhesive, and each polymerization piece is provided with an introduction hole penetrating horizontally, and a concrete nail 12 as a locking member is driven into the basic concrete 1 from this introduction hole, The grout form 6D is fixed.

  In the case of this grout mold 6D, by forming the mold body 10D in a circular shape, compared to the grout mold formed in a square frame, the lateral pressure when the grout material is filled in the mold is reduced. The bending deformation of the mold body 10D can be reduced.

  FIG. 11 is a plan view of the grout mold 6E according to the fifth embodiment. The grout mold 6E uses two long belt-shaped mold materials 2 and is similar to the case of the grout mold 6D according to the fourth embodiment. Forming the mold body 10D in a circular shape, the end portions of the adjacent strip-shaped mold materials 2 are in a polymerized state, and when this superposed portion is connected by a joining means such as a staple or an adhesive, an arc shape To form a circular mold body 10E.

  Further, the mold attachment portion 11E is formed by a short belt-shaped mold material 2 superposed on each belt-shaped mold material 2 forming the mold main body 10E, and this superposed piece is stapled to the mold main body 10E. Are joined together by joining means such as adhesive or adhesive, and each polymerized piece is provided with an introduction hole penetrating horizontally, and a concrete nail 12 as a locking member is driven into the foundation concrete 1 from this introduction hole, and the grout formwork 6E is fixed.

  In the case of this grout mold 6E, it is possible to enlarge / reduce the mold size by greatly overlapping the end portions of the respective band-shaped mold materials 2 as in the case of the third embodiment. As in the case of the modified example, a laterally long hole for sliding operation is provided for the strip-shaped frame member 2 located on the outside, and the inner and outer strip-shaped frame members 2 are connected by a pair of male and female fasteners. It is also possible.

  Accordingly, the grout mold 6E according to this embodiment can be shared without separately forming molds having different sizes as in the case of the third embodiment, and at the time of placing the level mortar described above. There is an advantage that it can be used as a formwork.

It is a perspective view of the column base part of the building which this invention implements. It is sectional drawing to which the principal part of the column base part in FIG. 1 was expanded. It is the perspective view which expanded the principal part of the strip | belt-shaped frame material used as the base material of the grout mold used in the column base part of FIG. 1 is a plan view of a grout mold of Example 1. FIG. It is a front view of the grout formwork of Example 1. It is drawing which expanded X part of FIG. 4, Comprising: (a) is shown with a top view, (b) is shown with a front view. It is drawing which expanded the Y part of FIG. 4, Comprising: (a) is shown with a top view, (b) is shown with a front view, (c) is shown with sectional drawing. It is a top view of the grout formwork of Example 2. It is a top view of the grout formwork of Example 3, Comprising: (a) shows a diameter reduction state, (b) shows a diameter expansion state. It is a top view of the grout formwork of Example 4. It is a top view of the grout formwork of Example 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Basic concrete 2 Anchor bolt 3 Steel column 4 Base plate 5 Fixing nut 6,6A, 6B, 6C, 6D, 6E Grout formwork 7 Connection support layer 8 Level mortar 9 Strip-shaped formwork material 10,10A, 10B, 10C, 10D , 10E Formwork body 11, 11A, 11B, 11C, 11D, 11E Formwork attachment part 12 Concrete nail (locking member)
13 Introduction hole 14 Staple (connecting member)

Claims (3)

A hollow plastic corrugated cardboard material with a large number of partition walls bonded between the front and back double-sided plates is cut into a fixed size to form one or more strip-shaped frame materials, and the desired shape is formed by connecting the ends of the strip-shaped frame materials. and forming a mold body, the outer position of the mold body is provided with a mold mounting portion obtained by polymerizing the plastic cardboard material at a plurality of locations, the plastic constituting the mold mounting section the cardboard material, in a manner penetrating through the front and back surfaces plate, introduction holes for driving a locking member such as concrete nails obliquely arranged, when installing the formwork body on foundation concrete, the formwork column base grout mold building the hollow portions partitioned by the partition piece in the body and the mold mounting portion and wherein the extension Mashimasu Turkey horizontally. The mold body, as well as a polygonal shape also circular including a square frame shape, outside of the formwork body the mold mounting section, a plastic cardboard material forming the mold frame mounting section as a polymerization piece or formed by connecting addressed to Therefore condition, set forth in claim 1 is one of either form outside pieces of the mold end portion connecting portion which is connected in a state that was allowed to overlap the body Grout formwork for pillars of buildings.   It is the installation method with respect to the grout formwork for column bases of the building described in Claim 1 or 2, Comprising: The said formwork main body is arrange | positioned on foundation concrete, and the partition piece is penetrated diagonally from the outer side of the said formwork attachment part. An installation method for a grout formwork for a column base of a building, wherein a locking member such as a concrete nail is driven in and fixed on foundation concrete.

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