JP2016223118A - Construction method and mold structure of foundation, and reinforcing tool for permanent mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a deep foundation readily at a reduced cost.SOLUTION: A pair of plate-form molds (31, 51) for a deep foundation is installed in an excavated part (10) facing each other, the molds for a deep foundation including a permanent mold (31) having reinforcing members (41, 42) fitted at top and bottom. Mold-width fasteners (61, 62) are spanned between the molds (31, 51) for a deep foundation for retaining an interval between the molds (31, 51) for a deep foundation, and an edge part of the permanent mold (31) is held by the mold-width fasteners (61, 62) through the reinforcing members (41, 42). Then, soil is refilled in a space outside of the permanent mold (31) in the excavated part. After refilling the soil, concrete is poured between the molds (31, 51) for a deep foundation, thus installing a deep foundation part (21).SELECTED DRAWING: Figure 4

Description

  The present invention relates to a concrete foundation construction method and formwork structure, and a discarded formwork reinforcement.

  The foundation of the building is built by pouring concrete between the installed forms. When constructing a concrete foundation using a formwork, for example, a width stopper as shown in Japanese Patent Application Laid-Open No. 2014-125825 (Patent Document 1) so as to maintain a width between a pair of opposed formwork at a predetermined interval. A tool (interval holding member) is used. The width stop is buried in concrete, but the formwork is usually removed and reused once the concrete has set.

  On the other hand, a basic structure in which one of the opposing molds is discarded as a mold has been proposed. For example, in Japanese Patent Application Laid-Open No. 2006-97261 (Patent Document 2) and Japanese Patent Application Laid-Open No. 5-247947 (Patent Document 3), a foam block serving as a discarded mold is disposed in an excavation part formed on the ground. Is disclosed.

JP 2014-125825 A JP 2006-97261 A JP-A-5-247947

  When constructing a solid foundation with a deep foundation, do not use the above-mentioned formwork and width fittings for the deep foundation, but use concrete on one side of the excavation (under the slab) as a slope. The method of placing is common. Specifically, as shown in FIG. 15, the deep foundation 121 is formed by pouring concrete between the formwork 501 installed on the outdoor side and the slope formed by the soil 11. The

  However, in the case of such a foundation 100, a large amount of concrete is required under the slab portion 123, and thus costs are increased. In addition, structural imbalances may occur due to imbalanced building weights. Furthermore, the rising portion 122 on the deep foundation portion 121 cannot be integrally formed with the deep foundation portion 121 and the slab portion 123, and it takes time and labor to construct the foundation 100. In other words, concrete must be placed in two steps.

  In addition, regardless of the presence or absence of deep foundations, when a foundation is constructed using only a general steel formwork, there are cases in which it cannot be flexibly handled according to the location conditions and building conditions of the building.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to improve the workability of the foundation, the foundation construction method and the formwork structure, and the reinforcement for the discarded formwork. Is to provide the ingredients.

  A foundation construction method according to an aspect of the present invention is a concrete foundation construction method in which a reinforcing member for increasing the bending strength of a discarded mold frame is attached to an edge of a rectangular plate-shaped discarded mold frame. And an installation process of installing a pair of molds including the discarded molds in a face-to-face state and a placement process of pouring concrete between the molds. In the installation process, in order to maintain the interval between the molds, the width stopper is bridged between the molds, and the discarded mold is held by the width stopper via the reinforcing member.

  Preferably, the pair of molds are constituted by a discard mold and a main mold. In this case, the present construction method further includes a step of removing the main form after the curing period of the concrete placed between the discarded form and the main form elapses.

  Preferably, in the installation step, the pair of molds are installed in the excavation part, and in the placement process, after the soil is backfilled in the space outside the disposal molds in the excavation part, the concrete is placed between the pair of molds. The deep foundation is cast by pouring.

  The construction method further includes a step of installing a solid foundation form including a rising part form above the deep foundation before the placing step. In this case, in the placing process, it is desirable that the deep foundation portion, the rising portion, and the slab portion are integrally cast by pouring concrete into both the pair of molds and the solid foundation mold.

  In this construction method, before the placing process, the horizontal throwing frame for forming the base part located below the deep foundation part intersects the throwing mold and is lower than the lower end height of the throwing mold. You may further provide the process installed so that it may arrange | position upwards.

  Preferably, the discard mold is a foamed heat insulating material. In the installation step, the pair of molds may be installed on the ground, and in the placement step, the rising portion may be placed by pouring concrete between the pair of molds. In this case, the discarded form frame attached to the rising portion serves as a heat insulating material for the concrete foundation.

  A formwork structure according to another aspect of the present invention is a formwork structure for placing concrete, a pair of molds that are disposed facing each other in a face-to-face state, and at least one of which is a rectangular plate-like discarded formwork In order to increase the bending strength of the frame and the discarded mold frame, a reinforcing member attached to the edge of the discarded mold frame, and a width stopper that spans between the mold frames and holds the discarded mold frame via the reinforcing member With.

  Preferably, the reinforcing member has a substantially U-shaped cross section. That is, the reinforcing member abuts on both sides of the edge of the discarded mold frame, connects the pair of abutting parts provided to sandwich the edge of the discarded mold frame, and the edge of the discarded mold frame. It is desirable to include a connecting portion that faces the end face.

  Preferably, a pair of formwork is a formwork for forming a deep foundation part. In this case, it is desirable that the inner dimension of the reinforcing member is larger than the thickness dimension of the discarded mold frame, and the discarded mold frame is arranged to be biased outward in the reinforcing member. In this case, the inner contact portion of the pair of contact portions of the reinforcing member may constitute a leaf spring.

  Also, in order to form a base portion that is disposed below the deep foundation portion, the vertical and horizontal frames and the horizontal frame that are installed in an intersecting state with each other are placed above the lower end height of the discarded mold frame. It may further include a support for supporting.

  It is desirable that the material of the discarded mold frame, the vertically discarded frame, and the horizontal discarded frame is a foamed heat insulating material. In this case, the support member is engaged directly or indirectly with the lower end portion of the discard frame, and protrudes from the engagement portion toward the vertical discard frame, and protrudes from below to support the horizontal discard frame. And a fixing portion that extends upward from the protruding portion and is pierced by the horizontal discard frame.

  According to still another aspect of the present invention, a discard frame reinforcing tool is attached to an edge of a rectangular plate-shaped discard mold frame for placing concrete, and is a reinforcing tool for increasing the bending strength of the discard mold frame. A pair of abutting portions provided to abut against both sides of the edge of the discarded mold frame and sandwich the edge of the discarded mold frame, and a connection that connects the abutting section and faces the edge end surface of the discarded mold frame A part. At least one of the abutting portion and the connecting portion extends along the edge of the discard mold.

  Preferably, the inner dimension of the connecting part is larger than the thickness dimension of the discarded mold frame, and one of the pair of contact parts constitutes a leaf spring that is biased toward the other side.

  Preferably, both the abutting portion and the connecting portion extend along the edge of the discard mold. In this case, it is desirable that a slit is provided at a boundary portion between the connecting portion and the contact portion located at the end portion in the longitudinal direction for connecting with another adjacent reinforcing tool.

  Moreover, the screw hole may be provided in the longitudinal direction edge part of a connection part for the connection with another adjacent reinforcement tool.

  According to the present invention, workability can be improved.

It is sectional drawing which shows partially the basic structure which concerns on embodiment of this invention. It is sectional drawing which shows the structure and formwork of the whole foundation which concern on embodiment of this invention. It is a flowchart which shows the construction procedure of the foundation which concerns on embodiment of this invention. In embodiment of this invention, it is sectional drawing which shows typically the structure of the deep foundation part periphery in the middle of construction. In embodiment of this invention, it is a figure which shows typically the state by which the formwork for deep foundations is hold | maintained with the width stopper. It is sectional drawing which shows the structural example of the reinforcement member (reinforcement tool) in embodiment of this invention. It is sectional drawing which expanded and showed the part shown by VII in FIG. It is a perspective view which shows the structural example of the support tool in embodiment of this invention. It is sectional drawing which shows the other structural example of a support tool. It is a perspective view which shows the other structural example of a support tool. It is sectional drawing which shows the further another structural example of a support tool. It is a perspective view which shows the further another structural example of a support tool. It is sectional drawing which shows an example of the foundation structure by which the discarding formwork for reinforcement is arrange | positioned. It is sectional drawing which shows the deep foundation part constructed using only this formwork as a comparative example. It is sectional drawing which shows the general solid foundation structure which has a deep foundation part. (A), (b) is a side view which shows the state in which the reinforcing tool was attached to the upper-lower-end part of the discard mold form from which height dimensions differ. FIG. 17 is a cross-sectional view of the discarded mold form taken along the line XVII in FIG. 16B, and conceptually illustrates vertical deflection that may occur in the discarded mold pattern having a relatively long height. FIG. 17 is a cross-sectional view of the discarded mold frame along the line XVIII in FIG. 16B, and conceptually illustrates lateral deflection that may occur at the center of the discarded mold frame having a relatively long height. It is a side view which shows the state in which the reinforcing tool was attached to the whole edge part of a discard mold. It is a perspective view which shows each reinforcement tool connected along the edge part of a discarding formwork. It is the figure which looked at the reinforcement tool of FIG. 20 from the XXI line direction (bottom face side). It is the figure which looked at the reinforcement tool of FIG. 20 from the XXII line direction (side surface side). It is sectional drawing which cut | disconnected the reinforcement tool of FIG. 20 along the XXIII line. It is a figure which shows the connection method of the reinforcement tool adjacent to the same direction. It is a figure which shows the connection method of the reinforcement tool adjacent to a cross direction. In the modification of embodiment of this invention, it is sectional drawing which shows the state in which the discard formwork was used on the outdoor side of the standing part arrange | positioned on the ground. In the modification of embodiment of this invention, it is sectional drawing which shows the state in which the discard formwork was used on the indoor side of the rising part arrange | positioned on the ground. It is a longitudinal cross-sectional view which shows the state by which the reinforcement board was attached to the outer surface of a discard mold. It is a cross-sectional view which shows the state by which the reinforcement board was attached to the outer surface of a discard mold.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

(About the basic structure of the foundation)
First, the schematic structure of the foundation 1 according to the present embodiment will be described with reference to FIG. The foundation 1 is a concrete foundation that supports a building such as a house, and is provided on a land with a height difference.

  As shown in FIG. 1, the foundation 1 is a solid foundation having a deep foundation portion 21. That is, the foundation 1 is adjacent to the deep foundation portion 21 located below the ground line GL, the base portion 20 located below the deep foundation portion 21, the rising portion 22 located thereon, and the rising portion 22. And a slab portion 23 arranged in the same manner. The deep foundation portion 21 is provided on the outer edge portion of the foundation 1. Therefore, the slab part 23 is adjacent to only one side in the thickness direction of the rising part 22. In addition, the thickness direction one side of the deep base part 21 and the rising part 22 is shown by arrow A1 of FIG. 1, and the said direction is hereafter called an indoor direction. The opposite direction is called the outdoor direction.

  The deep foundation part 21, the base part 20, the rising part 22, and the slab part 23 are made of concrete, and a reinforcing bar 70 is disposed therein. As shown in FIG. 1, the soil 11 under the slab part 23 is filled with rectangular plate-shaped molds 31 to 33 used for the construction of the deep foundation part 21 and the base part 20. The molds 31 to 33 are all formed of a foamed inorganic material, and typically, a foamed heat insulating material such as an extruded polystyrene foam may be employed.

  The formwork 31 is disposed along the indoor side surface of the deep foundation portion 21. The mold frame 32 is disposed along the side surface of the base portion 20 on the indoor side, and the mold frame 33 is disposed along the upper surface of the base portion 20 on the indoor side. In order to make these distinctions easy, in the present embodiment, the mold 31 is referred to as a “discarded mold 31”, the mold 32 as a “vertical discard frame 32”, and the mold 33 as a “horizontal discard frame 33”.

  The foundation 1 employs a heat insulating foundation structure, and a heat insulating material 80 may be provided on the side surfaces of the deep foundation portion 21 and the rising portion 22 on the outdoor side. In this case, it is desirable that the upper end portion of the rising portion 22 is formed with a protruding portion 22a that protrudes to the outdoor side. Since the upper end surface of the heat insulating material 80 is disposed so as to contact the lower surface of the protruding portion 22a, even if the white ants enter the joint between the deep foundation portion 21 and the heat insulating material 80 in the ground, Since it is guided to the outdoor side of the rising portion 22, the presence or absence of an ant road can be easily confirmed. The heat insulating material 80 itself may also be treated with an ant proof.

  Unlike the shape of the deep foundation part 121 in the well-known solid foundation 100 as shown in FIG. 15, the deep foundation part 21 has a shape like a cloth foundation. Therefore, it is not necessary to fill a large amount of concrete under the slab portion 23, and the cost can be reduced. In addition, the building weight can be balanced.

  By the way, the deep foundation portion 21 having a shape as shown in FIG. 1 can be made using only a general formwork intended for reuse without using the discarded formwork 31 or the like. A general formwork is made of metal, for example, and is formed of a material having hardness and durability. Such a formwork is referred to herein as a “main formwork”. The thickness dimension of this formwork is all constant (for example, 45 mm). The construction method and the formwork structure of the deep foundation part 21 using only this formwork will be briefly described with reference to FIG. In addition, the thickness of this formwork may be formed by performing a bending process etc. to a steel plate. That is, the back side (the opposite side of the surface on which the concrete is formed) of the main form does not have to be a uniform surface.

  In the foundation 90 shown in FIG. 14, the deep foundation portion 21 is formed by pouring concrete between a pair of main molds 51 and 52 facing each other. In this case, the width stoppers 61 and 62 are used in order to keep the interval between the main molds 51 and 52 constant. The width stopper 61 is spanned on the lower end side of the main molds 51 and 52, and holds both lower end portions. The width stopper 62 is bridged over the upper ends of the main molds 51 and 52, and holds both upper ends. Thereby, the shift | offset | difference of the inside and outside direction of this formwork 51 and 52 is prevented. In addition, this formwork (not shown) may be used also in the base part 20 of the deep foundation part 21. FIG.

  When the main molds 51 and 52 are used for the construction of the deep foundation part 21, after the curing period of the deep foundation part 21 has elapsed, the indoor formwork mold 52 is removed and the soil 11 is backfilled in the excavation part 10. Thus, the rising portion 22 and the slab portion 23 are driven. In addition, this formwork 53,54 is used for construction of the rising part 22 in the foundation 90. FIG.

  Since the outdoor formwork 53 is placed on the formwork 51, the width stopper 62 sandwiched between them is typically a stacking width stopper. On the other hand, the main formwork 54 on the indoor side is disposed above the upper end position of the deep foundation portion 21 in order to form the slab portion 23 integrally with the rising portion 22. In this case, the lower end of the main form 54 is held by the width stopper 63. The width stopper 63 is cantilevered by a pin for connecting the adjacent main molds 53 to each other.

  Thus, when using this formwork 51 and 52 for construction of the deep foundation part 21, since the foundation 90 whole cannot be integrally cast, the pump car which conveys concrete is needed twice. Moreover, the mold storage time (curing period) according to temperature is needed for the base part 20 and the deep base part 21 and the solid base part (including the rising part 22 and the slab part 23), respectively. . Therefore, such a construction method takes time and labor.

  On the other hand, in the present embodiment, as shown in FIG. 1, the formwork on the indoor side of the deep foundation portion 21 is not the main formwork 52 but the discarded formwork 31 and the indoor side of the base portion 20 is used. The form frame is also a vertically discarded frame 32 and a horizontally discarded frame 33. Thereby, the whole foundation 1 including the deep foundation part 21 can be integrally punched. Note that the thickness dimension of the discarded mold 31 is typically substantially the same as or slightly smaller than the thickness of the main mold 52.

(Construction method and formwork structure)
The construction method of the foundation 1 and the formwork structure for placing concrete used for the construction of the foundation 1 will be described in detail with reference to FIGS. FIG. 2 is a cross-sectional view showing the formwork structure of the entire foundation 1 according to the present embodiment. FIG. 3 is a flowchart showing the construction procedure of the foundation 1. FIG. 4 is a schematic cross-sectional view schematically showing the formwork structure around the deep foundation portion 21.

  First, a pre-process such as forming the excavation part 10 on the soil 11 and laying the crushed stone 12 on the excavation part 10 is performed. After that, as a framework for the base portion 20 of the deep foundation portion 21, a vertically discarded frame 32 is installed on the crushed stone 12 in the excavation portion 10 (process P1). A plurality of metal rods 46 are inserted into the crushed stone 12 at intervals along the inner side surface (outdoor side surface) of the vertical discard frame 32. The formwork (not shown) on the outdoor side of the base portion 20 may be a main formwork.

  Next, the reinforcing bar base 71 shown in FIG. 2 is installed, and the reinforcing bar 70 is assembled (process P2). Here, not only the portion of the deep foundation portion 21 but also the reinforcing bars 70 of the entire foundation 1 are assembled. When the reinforcing bar 70 is assembled, a deep foundation mold is installed on the installed reinforcing bar base 71 (process P3). That is, using the width stoppers 61 and 62, the main mold 51 and the discard mold 31 are installed in a face-to-face relationship with an interval therebetween. The width stoppers 61 and 62 are bridged between the molds 51 and 31 in order to make the distance between the main mold 51 and the discard mold 31 constant. In FIG. 4, the positions of the width stoppers 61 to 63 are schematically shown.

  As shown in FIG. 5, the width stopper 61 includes holding portions 61 a and 61 b that sandwich and hold the lower ends of the main mold 51 and the discard mold 31, respectively. The width stopper 62 includes holding portions 62a and 62b that hold the upper end portions of the main mold 51 and the discard mold 31 in a sandwiched manner. The width stopper 61 may be a known general separator, and the width stopper 62 may be a known stacking separator.

  As shown in FIG. 5, the main frame 51 has bent portions 51 a and 51 b having a predetermined length at the lower end and the upper end on the back side (outer side). In this case, the surface (inner side surface) of the main mold 51 and the bent portion 51a are sandwiched between the pair of standing pieces as the holding portions 61a of the width stopper 61. Further, the surface of the main frame 51 and the bent portion 51b are sandwiched by the side end portions of the pair of flanges as the holding portions 62a of the width stopper 62.

  Here, since the discarded mold 31 is formed of the foam-based heat insulating material as described above, it is lightweight and has good workability, but its strength is weaker than that of the main mold 51. Therefore, in the present embodiment, for example, steel reinforcing members (reinforcing tools) 41 and 42 are respectively attached to the upper and lower end portions of the discard mold 31. Each reinforcing member 41, 42 is a runner having a substantially U-shaped cross section. The outer dimensions of the reinforcing members 41 and 42 are preferably substantially the same as the thickness dimension of the main frame 51.

  The reinforcing members 41 and 42 will be described with further reference to FIG. The reinforcing member 41 includes a bottom plate portion 41a that abuts on the lower end surface of the discarded mold frame 31, and flange portions 41b and 41c connected to the inner and outer end portions of the bottom plate portion 41a. Similarly, the reinforcing member 42 includes an upper plate portion 42a that is in contact with the upper end surface of the discard mold 31 and flange portions 42b and 42c that are connected to inner and outer end portions of the upper plate portion 42a. The inner flange portions 41 b and 42 b extend along the inner surface of the discard mold 31. The outer flange portions 41 c and 42 c extend along the outer surface of the discard mold 31. In addition, in the example of FIG. 6, although the center part of the inner side flange parts 41b and 42b is bent toward the outer side flange parts 41c and 42c, you may extend straight similarly to the outer side flange parts 41c and 42c.

  Since such rail-shaped reinforcing members 41 and 42 are fitted into the upper and lower end portions of the discard mold 31, in this embodiment, the width stoppers 61 and 62 are discarded via the reinforcing members 41 and 42. The end of the mold 31 can be held. Accordingly, it is possible to reliably fix the position of the discard mold 31.

  When the deep foundation molds 51 and 31 are installed, the horizontal discard frame 33 for the upper surface of the base portion 20 is installed in an orthogonal (crossing) state to the discard mold 31 (process P4). At this time, it is desirable that the horizontal discard frame 33 is disposed above the lower end height of the discard mold 31, that is, above the lower surface position of the bottom plate portion 41 a of the reinforcing member 41. When concrete is poured between the main mold 51 and the discarded mold 31, there is a possibility that the concrete does not flow around the entire lower surface of the horizontal discarded frame 33, and a gap is formed under the horizontal discarded frame 33. is there. Therefore, if a gap is formed under the horizontal throwing frame 33 when the height of the lower surface of the horizontal throwing frame 33 is the same as the lower end height of the throwing mold 31, the height of the base portion 20 on the indoor side May not meet the design height.

  On the other hand, when the horizontal discard frame 33 is installed above the lower end height of the discard mold 31, the height of the base portion 20 of the deep foundation portion 21 is slightly higher on the indoor side than on the outdoor side. In this case, there is no structural problem. Since the outdoor side of the base part 20 is not covered with the soil 11, it is possible to confirm the concrete condition. However, as will be described later, the indoor side molds 31 to 33 are placed at the stage of placing concrete. 11 is not visible. For this reason, in the present embodiment, for the sake of safety, the horizontal discard frame 33 is disposed higher than the lower end height of the discard mold 31.

  In order to install the horizontal discard frame 33 higher than the lower end height of the discard mold 31, a support tool 43 is used. The support tool 43 supports the outdoor side end portion of the horizontal discard frame 33 by directly or indirectly engaging the lower end portion of the discard mold frame 31. A configuration example of the support tool 43 will be described with reference to FIGS. 7 and 8. FIG. 7 is an enlarged view of the portion indicated by VII in FIG.

  As shown in FIG. 7, the support tool 43 includes an engaging portion 43a, a protruding portion 43b, and a fixing portion 43c. The support tool 43 is formed, for example, by bending a thin steel plate.

  The support tool 43 is hooked on the outer flange portion 41 c of the reinforcing member 41 fitted in the discard frame 31. In this case, the engaging portion 43 a is indirectly engaged with the lower end portion of the discarded mold frame 31 by being sandwiched between the outer flange portion 41 c of the reinforcing member 41 and the discarded mold frame 31. The protruding portion 43 b protrudes outward (in the indoor direction) from the upper end of the engaging portion 43 a and supports the lower surface of the horizontal throwing frame 33. That is, the protruding portion 43b protrudes from the engaging portion 43a toward the vertical discard frame 32, and supports the horizontal discard frame 33 from below.

  The fixing portion 43 c extends upward from, for example, the outer end of the protruding portion 43 b and is pierced by the horizontal discard frame 33. Since the horizontal discard frame 33 is formed of a foam-based heat insulating material, the horizontal discard frame 33 can be fixed to the support 43 by inserting the fixing portion 43 c into the horizontal discard frame 33. It is desirable that the fixed portion 43c has one or more sharp portions at the upper end.

  In this manner, the outdoor side end portion of the horizontal discard frame 33 is lifted and supported by the support tool 43 sandwiched between the discard mold frame 31 and the reinforcing member 41. On the other hand, the indoor side end portion of the horizontal discard frame 33 is placed on and supported by the vertical discard frame 32. In this case, the height of the vertical discard frame 32 is slightly higher than the lower end height of the discard mold 31. The fixing of the indoor side end portion of the horizontal discard frame 33 is realized by placing the metal rod 46 disposed along the vertical discard frame 32 so as to pierce the lower surface of the horizontal discard frame 32.

  In addition, although the reinforcement member 41 and the support tool 43 were provided separately here, these may be united. That is, the protruding portion 43b and the fixing portion 43c may be included in the reinforcing member 41 as a support portion. In this case, the above-described engaging portion 43a is not necessary, and the protruding portion 43b may be connected to the upper end portion of the outer flange portion 41c of the reinforcing member 41. When the reinforcing member 41 has a support portion, as in the support tool 43 shown in FIG. 7, it is possible to save the trouble of inserting the engaging portion 43 a between the discard frame 31 and the outer flange portion 41 c of the reinforcing member 41. Construction becomes easy.

  Alternatively, a support tool 44 as shown in FIGS. 9 and 10 may be used. The support tool 44 is stabbed into the discarding mold frame 31 to thereby directly engage the lower end portion of the discarding mold frame 31, and a protrusion 44b provided continuously to the engaging part 44a. The fixing portion 44c extends upward from the outer end of the projecting portion 44b and is pierced into the horizontal discard frame 33. The length dimension of the flat plate combining the engaging portion 44a and the protruding portion 44b is sufficiently larger than the thickness dimension of the discard mold 31 and protrudes in the indoor direction from the outer flange portion 41c of the reinforcing member 41. By adopting such a configuration, as in the support tool 43 shown in FIG. 7 and FIG. 8, the engaging portion 43 a is inserted rather than being inserted between the discarded mold frame 31 and the outer flange portion 41 c of the reinforcing member 41. The support tool 44 can be easily engaged with the throwaway mold 31 and fixed.

  Furthermore, the support may have the following structure. 11 and 12 show a support tool 45 having a function of positioning the vertical discard frame 32. The support tool 45 includes an engaging portion 45a, a protruding portion 45b, a fixing portion 45c, a positioning portion 45d, and a fixing portion 45e.

  The engaging portion 45 a is stabbed into the discard mold 31 and engages with the discard mold 31. The protruding portion 45b is provided continuously to the engaging portion 44a. The protruding length of the protruding portion 45b is longer than the protruding length of the protruding portions 43b and 44b of the support members 43 and 44 described above. The fixing portion 45c is formed by cutting and raising a part of a flat plate having the protruding portion 45b, and has a plurality of sharpened portions.

  The positioning portion 45d extends downward from both side portions of the protruding portion 45b and is formed in a flange shape. The positioning portion 45d has a predetermined length along the inner and outer directions. The fixing portion 45e extends downward from both side portions of the protruding portion 45b and is provided adjacent to the positioning portion 45d. The fixing portion 45e has one or more sharpened portions and is pierced at the upper end of the vertical discard frame 32. By abutting the inner side surface (outdoor side surface) of the vertical discard frame 32 with the outer end of the positioning portion 45d, the interval between the discard mold frame 31 and the vertical discard frame 32 can be positioned at a constant level.

  By using such a support tool 45, it is not necessary to separately prepare a member for positioning the vertical discard frame 32. The fixing portion 45e described above protrudes in the indoor direction from the indoor side edge of the horizontal discard frame 33 and has a plurality of sharpened portions along the protrusion direction in order to enable fixing of the vertical discard frame of various thicknesses. You may do it.

  Note that the vertical discard frame 32 can be positioned by the support tool without using the configuration of the positioning portion 45d and the fixing portion 45e. For example, you may provide a pair of holding part which pinches | interposes the side surface of the vertical discard frame 32 in the outer end part of the protrusion part 45b.

  Referring to FIGS. 2 and 3 again, once the horizontal frame 33 is installed, next, the deep form upper main molds 53 and 54 are installed (process P5). That is, a pair of main molds 53 and 54 for forming the rising portion 22 on the deep foundation portion 21 are installed in a face-to-face state. The space between the molds 53 and 54 is kept constant by a width stopper 63 at the lower end and a width stopper (not shown) at the upper end. The main molds 53 and 54 are included in the solid basic form.

  When the installation of the main molds 53 and 54 on the deep foundation upper stage is completed, the soil 11 is backfilled in the space outside the discarded mold 31 in the excavation part 10 (process P6). The soil 11a shown in FIG. 2 is the soil buried back in the excavation part 10. When the soil 11 is backfilled, the crushed stone 12 below the slab portion 23 is laid.

  When the soil 11 is backfilled, a load of the soil 11 is applied to the outer side surface (indoor side surface) of the discard mold 31. Although the upper and lower ends of the discarded mold 31 are reinforced by the reinforcing members 41 and 42, the central part of the discarded mold 31 is not reinforced, so that the central part of the discarded mold 31 may be bent in the outdoor direction. is there. If the concrete is poured in the state in which the discarded mold 31 is curved, there is a possibility that the deep foundation portion 21 cannot be formed appropriately, for example, the thickness of the deep foundation portion 21 is insufficient in the curved portion.

  Therefore, the inner dimension of the reinforcing members 41 and 42 is made larger than the thickness dimension of the discarded mold frame 31, and the discarded mold frame 31 is arranged in a position biased outward in the reinforcing members 41 and 42. desirable. For example, a spacer may be interposed between the inner flange portions 41 b and 42 b and the discarded mold frame 31. In this case, even when the center portion of the discard mold 31 is curved toward the outdoor direction during backfilling, a predetermined thickness of the deep foundation portion 21 can be ensured.

  Furthermore, in order to prevent the bending deformation of the discarded mold 31 itself, the reinforcing members 41 and 42 of the present embodiment have a structure as shown in FIG. 6, for example.

  Referring to FIG. 6, the inner dimension d2 of the reinforcing members 41 and 42 is larger than the thickness dimension d1 of the discard frame 31, and the respective inner flange portions 41 b and 42 b constitute a leaf spring. That is, the center portions in the vertical direction of the inner flange portions 41b and 42b are bent toward the outer flange portions 41c and 42c, and the inner flange portions 41b and 42b are biased toward the outer flange portions 41c and 42c. The difference between the inner dimension d2 of the reinforcing members 41 and 42 and the thickness dimension d1 of the discard mold 31 is, for example, 2 mm or more and 5 mm or less. As a result, the discard mold 31 is disposed in the reinforcing members 41 and 42 so as to be biased outward.

  Therefore, even when a load (earth pressure) is applied from the direction of the arrow in FIG. 6, as shown by an imaginary line, the thickness difference, the discarded mold 31 moves in parallel to the main mold 51 (inside). By doing so, the bending deformation of the discard mold 31 can be reduced or suppressed.

  When the soil 11 is backfilled or crushed, the other part of the main form is installed (process P7). In the example of FIG. 2, a pair of main molds 55 and 56 for the rising portion 24 are installed in an opposed state at the end opposite to the position of the deep foundation portion 21. In addition, a pair of main molds 57 and 58 for the rising portion 25 are installed in the central region of the foundation 1 in an opposed state. These main molds 55 to 58 are also solid foundation molds.

  In the present embodiment, concrete is poured at the stage where the entire formwork of the foundation 1 is installed in this way (process P8). Thereby, the whole foundation 1 including the deep foundation part 21 is driven at once. As described above, since the horizontal discard frame 33 is disposed above the lower end height of the discard mold 31, the horizontal discard frame 33 is lifted from the upper surface of the base portion 20 as shown in FIG. 4. It may be.

  When a curing period of several days elapses after the concrete is placed, all the main molds 51, 53 to 58 are removed (process P9). At this time, the end portions on the outdoor side of the width stoppers 61 and 62 used for installing the main form 51 of the deep foundation portion 21 are in a state of protruding from the heat insulating material 80. Therefore, the foundation 1 is finished after the protruding portions of the width stoppers 61 and 62 are cut. FIG. 1 shows the width stoppers 61 and 62 after cutting.

  As described above, according to the present embodiment, the entire foundation 1 can be integrally punched by using one of the molds (indoor side) of the deep foundation portion 21 as the discard mold 31. Therefore, it is possible to carry concrete by a pump car at a time. In addition, in the case of double hitting, the construction of the upper solid base portion 26 cannot be started unless the curing period of the deep base portion 21 has elapsed, whereas in this embodiment, the base 1 is hit at once. Therefore, the construction period can be greatly shortened. Moreover, construction cost can be suppressed.

  Furthermore, since the foundation 1 is integrally punched, there is no seam between the deep foundation portion 21 and the solid foundation portion 26, so that the ant protection can be improved as compared with the conventional case.

  Moreover, since many foam-type heat insulation materials with the same thickness dimension (45 mm) as the main mold 51 are distributed, a commercially available foam heat-insulation material can be used as the discard mold 31. In addition, as shown in FIG. 6, in the case of reducing the thickness dimension of the discarded mold 31 than the inner dimension of the reinforcing members 41 and 42, by using a 40 mm foamed heat insulating material in circulation, The movement of the discard mold 31 of about 5 mm can be allowed.

  Further, by using the reinforcing members 41 and 42 having the same outer dimensions as those of the main mold 51, the discard mold 31 can be fixed using the commercially available width stoppers 61 and 62. Therefore, since it is not necessary to prepare a special member for fixing the discard mold 31, the deep foundation portion 21 can be formed easily and at low cost.

  In addition, the construction order shown in FIG. 3 is an example, and is not limited to such a construction order. For example, after installing the molds 51 and 31 for the deep foundation portion 21, the soil 11 may be backfilled, and then all the solid foundation molds may be installed at once. That is, the process P5 and the process P7 shown in FIG. 3 may be a single process.

  In addition, although there is only one discard mold 31 in the deep foundation portion 21, the longer the discard mold 31 is in the vertical direction, the more likely that the discard mold 31 is deformed when the soil 11 is backfilled. Get higher. Therefore, when the deep foundation portion 21 is long and it is necessary to use a relatively long disposal mold 31, one or more disposal molds are disposed outside the disposal mold 31 as shown in the foundation 1 </ b> A of FIG. 13. The frame 34 may be overlapped to increase the strength. Since these reinforcing molds 34 do not engage with the width stoppers 61 and 62, the reinforcing members 41 and 42 as described above may be unnecessary for these molds 34.

  Moreover, in this Embodiment, although the foundation 1 showed the example containing the one deep foundation part 21, the foundation 1 may contain the several deep foundation part 21. FIG. In addition, although one side surface of the deep foundation portion 21 is covered with the soil 11 and the other side surface faces the outdoor space, both sides of the deep foundation portion may be covered with the soil 11. In this case, both of the deep foundation molds may be discarded molds 31 reinforced by the reinforcing members 41 and 42.

  In addition, the molds 31 to 33 buried in the soil 11 are made of foamed inorganic material. However, the present invention is not limited to this, and may be, for example, a resin, a laminated corrugated cardboard, or the like. .

  Further, in the present embodiment, the deep foundation portion 21 and the solid foundation portion 26 are driven once by using the discard mold 31, but this is not a limitation and the placement is divided into two times. May be. Even in the case of two times, it is possible to save the labor of removing the formwork on the indoor side of the deep foundation part 21, so that the deep foundation part 21 can be formed more easily than using the entire formwork.

  In addition, you may provide only the reinforcement tool (reinforcement members 41 and 42) used for reinforcement of the discard mold 31 by itself. More detailed functions and structural examples of the reinforcing tool will be described below.

(About the reinforcement)
Referring to FIG. 16A, as described above, when the reinforcing tools 4 (reinforcing members 41 and 42) are attached to the upper and lower ends of the discarded mold 31 that is a foam-based heat insulating material, the discarded mold 31 Among the bendings that occur in the front and back direction (thickness direction), bending along the horizontal direction (arrow A2 direction in the figure) is suppressed. That is, the reinforcing member 4 increases the bending strength along the lateral direction of the discarded mold 31. Therefore, even when the load of the buried soil 11 is applied to the outer surface of the discard mold 31, the bending that occurs along the lateral direction of the discard mold 31 is suppressed (particularly at the upper and lower ends). Moreover, if the cross-sectional structure of the reinforcing tool 4 has a structure as shown in FIG. 6, the bending of the discard mold 31 in the vertical direction is also suppressed.

  However, as shown in FIG. 16B, in the case of a discarded mold 31A having a relatively long height L2 (for example, about 600 mm), as shown in FIG. 17, the bent mold 31A is bent along the vertical direction. May occur. Further, in the case of the discarded mold 31A, as shown in FIG. 18, there is a possibility that some bending along the lateral direction may occur partially (at the center in the vertical direction). In the above-described embodiment, it is assumed that a discarded mold 31 having a relatively short height L1 (for example, about 300 mm) as shown in FIG.

  Therefore, particularly when the deep foundation portion 21 is long and it is necessary to use the discarded mold 31A having a relatively long height, as shown in FIG. 19, not only the upper and lower ends of the discarded mold 31A but also the edges. It is desirable to attach the reinforcing tool 4 to the entire portion (four sides). In addition, the reinforcing tool 4 may be only partially disposed at the vertical direction end and the horizontal direction end of the disposal mold 31A. Further, even when the discarded mold 31 having a relatively short height is used, the entire edge of the discarded mold 31 is reinforced to increase the overall bending strength in accordance with the material of the discarded mold 31 and the like. Tool 4 may be attached.

  The reinforcing tool 4 is a metal piece that is long in one direction and has a predetermined length. In at least one of the upper and lower end portions and the lateral end portion of the discard mold 31A (31), the plurality of reinforcing tools 4 may be attached in a state of being adjacent to each other. In the example of FIG. 19, two reinforcing tools 4 are attached along the upper and lower sides of the discard mold 31 </ b> A. Each of the reinforcing tools 4 desirably has a structure that can easily connect the other reinforcing tools 4 arranged in the same direction and the other reinforcing tools 4 that intersect each other. Examples of the structure of such a reinforcing tool 4 are shown in FIGS.

  FIG. 20 is a perspective view showing the reinforcing tool 4. FIG. 21 is a view of the reinforcing tool 4 of FIG. 20 as viewed from the XXI line direction (bottom side). FIG. 22 is a view of the reinforcing tool 4 of FIG. 20 as viewed from the direction of the line XXII (side surface side). FIG. 23 is a cross-sectional view of the reinforcing tool 4 of FIG. 20 cut along the line XXIII.

  The reinforcing tool 4 includes a pair of contact portions 4b and 4c and a connecting portion 4a that connects the contact portions 4b and 4c. At least a part of the abutting portions 4b and 4c abuts on both sides of the edge of the discarded mold 31 (31A). That is, when the reinforcing tool 4 is attached to the lower end portion of the discard mold 31, both side surfaces of the lower end portion of the discard mold 31 are sandwiched by the contact portions 4 b and 4 c. The connecting portion 4 a abuts (faces) the edge surface of the discard mold 31. That is, when the reinforcing tool 4 is attached to the lower end portion of the discarded mold frame 31, the connecting portion 4 a comes into contact with the bottom surface of the discarded mold frame 31. The contact portions 4b and 4c and the connecting portion 4a extend along the edge of the discard frame 31 to be attached. It is assumed that the inner dimension of the connecting portion 4a is the inner dimension of the reinforcing tool 4, and the outer dimension of the connecting section 4a is the outer dimension of the reinforcing tool 4.

  The basic structure of the reinforcing tool 4 shown here is the same as the structure of the reinforcing members 41 and 42 shown in FIG. Therefore, the bottom plate portion 41a of the reinforcing member 41 and the upper plate portion 42a of the reinforcing member 42 correspond to the connecting portion 4a, and the pair of flange portions 41b and 41c of the reinforcing member 41 and the pair of reinforcing members 42 are provided. The flange portions 42b and 42c correspond to the contact portions 4b and 4c.

  At both ends in the longitudinal direction of the reinforcing tool 4, slits 401 and 402 are provided at the boundary between the connecting portion 4 a and the contact portions 4 b and 4 c. Specifically, a pair of slits 401 is provided on both sides of the connecting portion 4a at one end of the connecting portion 4a. Similarly, a pair of slits 402 is provided on both sides of the connecting portion 4a at the other end of the connecting portion 4a. The length dimension d3 of each slit 401, 402 is, for example, about 20 mm. In addition, screw holes 403 are provided at both ends of the connecting portion 4a within the range of the slits 401 and 402.

  As described above, in the direction orthogonal to the longitudinal direction of the reinforcing tool 4, the length dimension d4 of one abutting portion 4b is longer than the length dimension d5 of the other abutting portion 4c. The center of the part 4b is bent toward the contact part 4c side. In this case, as shown in FIG. 23, it is possible to facilitate the fitting of the reinforcing tool 4 into the edge portion of the discard mold 31.

  The length d5 of the shorter abutting portion 4c is equal to or slightly longer than the length of the bent portions 51a and 51b on the back surface side of the main mold 51 shown in FIG. Therefore, it is possible to fix the throw-away form with the reinforcing member 4 with certainty in the same manner as fixing a pair of main forms using an existing width stopper.

  Here, a connection method of the reinforcing tool 4 using the slits 401 and 402 described above will be described. FIG. 24 is a diagram illustrating a method of connecting the reinforcing tools 4 adjacent in the same direction, and FIG. 25 is a diagram illustrating a method of connecting the reinforcing tools 4 adjacent in the intersecting direction.

  With reference to FIG. 24 (a), (b), the case where the some reinforcement tool 4 is connected in the same direction and an elongate reinforcement tool (reinforcement member) is made is demonstrated. In FIG. 24A, when the right side of the drawing is one side and the left side is the other side, the other end portions of the contact portions 4 b and 4 c of the one reinforcing tool 4 are bent slightly outward at the slit 402. At this time, the end portions on one side of the contact portions 4 b and 4 c of the other reinforcing tool 4 may be bent slightly inward at the slit 401.

  Thereafter, referring to FIG. 24B, the other reinforcing tool 4 so that the contact parts 4 b and 4 c of one reinforcing tool 4 overlap the outside of the contact parts 4 b and 4 c of the other reinforcing tool 4. Is fitted into the other end of one reinforcing member 4. Thereby, the connection part 4a of the reinforcement tool 4 adjacent in the same direction is overlapped in the range of the slits 401 and 402. As described above, the slits 401 and 402 are provided at both ends in the longitudinal direction of each reinforcing tool 4 so that the reinforcing tools 4 can be easily connected in the same direction. The width stoppers 61 and 2 described above are preferably attached to the connecting portion of the reinforcing member 4. Thereby, the connection strength of both can be improved, without using a fixing tool for the connection location of the reinforcement tool 4 separately.

  With reference to FIG. 25 (a), (b), the case where the some reinforcement tool 4 is connected to a cross direction and the L-shaped reinforcement tool (reinforcement member) is made is demonstrated. In FIG. 25 (a), if the upper side of the drawing is one side and the lower side is the other side, the other side end of the connecting portion 4a of the one reinforcing tool 4 is placed inward so as to be substantially perpendicular to the connecting portion 4a at the slit 402. Bend it. Similarly to the case where the reinforcing tool 4 is connected in the same direction, the one end of the contact portions 4 a and 4 b of the other reinforcing tool 4 is bent slightly inward at the slit 401. In addition, you may bend | fold slightly the other side edge part of contact part 4b, 4c of one reinforcement tool 4 in the location of the slit 402 outside.

  Thereafter, referring to FIG. 25 (b), one side end of the other reinforcing tool 4 so that the bent connecting portion 4 a of one reinforcing tool 4 overlaps the connecting portion 4 a of the other reinforcing tool 4. The part is fitted into the other side end of one reinforcing tool 4. At this time, the connecting portions 4a are overlapped so that the positions of the screw holes 403 coincide. Further, the contact portions 4 b and 4 c of one reinforcing tool 4 are overlapped on the outside of the contact portions 4 b and 4 c of the other reinforcing tool 4.

  In this state, when the screw 404 is inserted into the screw hole 403 of the overlapping connecting portion 4a, the reinforcing tool 4 adjacent in the intersecting direction is securely fixed. The screw 404 may be stabbed into the edge end surface of the discard frame 31 fitted into the reinforcing tool 4 by being inserted from the outside toward the inside. When the reinforcing members 4 are fixed to each other, the other side end portions of the contact portions 4b and 4c of one reinforcing member 4 face the outer surface of the connecting portion 4a of the other reinforcing member 4 within the range of the slit 402. Can be bent. Thus, by providing the slits 401 and 402 at both ends in the longitudinal direction of each reinforcing tool 4, the reinforcing tool 4 can be easily connected in the cross (orthogonal) direction.

(Modification)
In the above embodiment, an example in which a discarded formwork is used for the construction of the deep foundation part is shown, but the discarded formwork may be used for construction of a part other than the deep foundation part, that is, a rising part arranged on the ground. Good. For example, as shown in FIG. 26, the discarded mold 31B is used for the rising portion 22A of a general solid foundation 1B that does not have a deep foundation portion. The rising portion 22A is located at the outer edge of the solid foundation 1B. The rising portion 22A may be a rising portion of a fabric foundation. Further, most of the rising portion 22A only needs to be arranged above the ground line, and a part of the rising portion 22A may be arranged below the ground line.

  A pair of molds for forming the rising portion 22A is composed of a discard mold 31B arranged on the outdoor side and a main mold 54 arranged on the indoor side. The upper end portion of the discard mold 31 </ b> B and the upper end portion of the main mold 54 are held by the width stoppers 64. The width stopper 64 holds the discard mold 31B via the reinforcing member 42 (reinforcing tool 4).

  When the concrete curing period elapses, the main form 54 is removed, but the discarded form 31B is left as it is. That is, the discarded mold 31B is attached to the outdoor side surface of the rising portion 22A of the solid foundation 1B. As described above, the discard mold 31B is a foam heat insulating material. Therefore, the discard mold 31B attached to the outdoor side surface of the rising portion 22A can function as a heat insulating material for the solid foundation 1B. In addition, the part which protruded upwards rather than the rising part 22A among discard mold 31B can be cut | disconnected easily.

  Conventionally, when improving the heat insulation of the foundation, after forming the solid foundation 1B, a foam-type heat insulating material is post-attached to the outer surface of the rising portion 22A with an adhesive or the like. On the other hand, according to this modification, the formwork for placing the concrete foundation can be used as it is as a heat insulating material for the foundation, so that it is possible to save the trouble of post-attaching the heat insulating material to the rising portion 22A. . As shown in FIG. 27, such an effect is similarly achieved when the discarded mold 31C is disposed on the indoor side surface of the rising portion 22A.

  Moreover, it is effective also when constructing a concrete foundation in the narrow land of an urban area by throwing away the formwork on the outdoor side of the rising part 22A located on the ground as the formwork 31B. This is because it is not necessary to secure a space for removing the main form. Therefore, the range of the foundation can be extended to the borderline of the land by using the discard form 31B having the reinforcing members 41 and 42 attached to at least the upper and lower ends. As a result, restrictions on building planning can be relaxed.

  In the present modification, the outer surface of the discarded mold 31B is exposed to the outdoor space when placing concrete. In addition, as shown in FIG. 26, when the discarded mold 31B is disposed on the outdoor side of the rising portion 22A, the height of the discarded mold 31B is relatively long. Therefore, when concrete is poured between the pair of molds, the discard mold 31B may be curved toward the outdoor side. Therefore, particularly in the present modification, it is desirable that the reinforcing tool 4 is attached to the entire edge of the discarded mold frame 31B as in the discarded mold frame 31A shown in FIG.

  Further, in order to improve the bending strength of the entire discarded mold 31B, a reinforcing plate 65 extending in the vertical direction may be provided on the outer surface of the discarded mold 31B as shown in FIG. The reinforcing plate 65 is held by the width stopper 64 together with the reinforcing member 42 at the upper end of the discard mold 31B. The reinforcing plate 65 is a lightweight plate member having rigidity. The cross section of the reinforcing plate 65 is, for example, wavy.

  As shown in FIG. 29, the reinforcing plate 65 may be provided over the entire lateral width of the discard mold 31 </ b> B. In this case, the reinforcing plate 65 is attached to the entire outer surface of the discard mold 31B.

  By disposing the reinforcing plate 65 on the outer side surface of the discarded mold frame 31B, even if a load is applied from the inner surface side of the discarded mold frame 31B, deformation of the discarded mold frame 31B can be prevented. As a result, the rising portion 22A can be appropriately formed.

  In addition, when arrange | positioning the discard mold 31B just at the boundary of land, the sheet | seat material (not shown) which has waterproofness between the discard mold 31B and the reinforcement board 65 so that the reinforcement board 65 can be pulled up from the top. ) May be interposed.

  Further, the reinforcing plate 65 may not be disposed on the entire outer surface of the discarded mold frame 31, and may be disposed, for example, only on a part of the outer surface of the discarded mold frame 31 (for example, the central portion in the lateral width direction).

  As described above, the reinforcing member is attached to the edge of the foamed heat-insulating mold form, so that it can be handled in the same manner as the main formwork made of steel. Since the variation of the height dimension of this formwork is limited, the vertical length of the deep foundation part and the rising part can be longer than necessary when constructing the deep foundation part and the rising part only with this formwork. There is sex. On the other hand, since the height dimension of the discarded mold can be determined freely, the vertical length of the deep foundation part and the rising part can be set to an appropriate length by using the discarded mold. it can. Therefore, the amount of concrete used can be reduced. As a result, it is possible to expect a reduction in costs for foundation construction.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1, 1A, 1B, 90, 100 Foundation, 4, 41, 42 Reinforcing tool (reinforcing member), 4a connecting part, 4b, 4c abutting part, 10 excavating part, 11 soil, 12 crushed stone, 20 base part, 21, 121 deep foundation part, 22, 22A, 24, 25, 122 rising part, 23, 123 slab part, 26 solid foundation part, 31, 31A, 31B, 31C, 34 abandoned formwork, 32 vertical discard frame, 33 horizontal discard frame , 41a Bottom plate portion, 41b, 42b Inner flange portion, 41c, 42c Outer flange portion, 42a Upper plate portion, 43, 44, 45 Support, 43a, 44a, 45a Engagement portion, 43b, 44b, 45b Protruding portion, 43c , 44b, 44c, 45c, 45e Fixing part, 46 Metal rod, 51-58 Formwork, 61, 62, 63, 64 Width stop, 61a, 61b, 62a, 62b Holding , 65 reinforcing plate 70 reinforcing bars, 71 rebar base, 80 heat insulator, 401, 402 slit, 403 screw holes, 404 screw, GL ground line.

Claims (15)

A concrete foundation construction method,
With a reinforcing member for increasing the bending strength of the discarded mold frame attached to the edge of the rectangular plate-shaped discarded mold frame, the pair of mold frames including the discarded mold frame are spaced from each other in a face-to-face state. Installation process to install,
A placing step of pouring concrete between the molds,
In the installation step, in order to maintain the interval between the molds, a width stopper is bridged between the molds, and the discard mold is held by the width stopper via the reinforcing member. Construction method. The pair of molds is composed of the discard mold and the main mold,
The foundation construction method according to claim 1, further comprising a step of removing the main form after a curing period of concrete cast between the discarded form and the main form passes. In the installation step, the pair of molds are installed in the excavation part,
In the placing step, a deep foundation portion is placed by pouring concrete between the pair of molds after the soil is backfilled in a space outside the discarded molds in the excavation part. The foundation construction method according to 1 or 2. Prior to the placing step, further comprising a step of installing a solid foundation mold, including a rising portion mold on the deep foundation.
In the placing step, the deep foundation portion, the rising portion, and the slab portion are integrally punched by pouring concrete into both the pair of molds and the solid foundation mold. The foundation construction method.   Prior to the placing step, a horizontal discard frame for forming a base portion located below the deep foundation portion intersects the discard mold and is above the lower end height of the discard mold The foundation construction method according to claim 3, further comprising a step of installing so as to be disposed on the base. The discarded formwork is a foam heat insulating material,
In the installation step, the pair of molds are installed on the ground,
In the placing step, by pouring concrete between the pair of molds, the rising portion is placed,
The foundation construction method according to claim 1 or 2, wherein the discarded form frame attached to the rising portion serves as a heat insulating material for the concrete foundation. A formwork structure for placing concrete,
A pair of molds that are installed facing each other in a face-to-face state, at least one of which is a rectangular plate-shaped discard mold,
In order to increase the bending strength of the discarded mold frame, a reinforcing member attached to an edge of the discarded mold frame;
A formwork structure comprising: a width stopper that spans between the formwork and holds the discard formwork via the reinforcing member. The reinforcing member has a substantially U-shaped cross section,
The reinforcing member abuts on both sides of the edge of the discarded mold frame, and connects the abutting section with a pair of abutting portions provided to sandwich the edge of the discarded mold frame, and the discarded mold frame The formwork structure of Claim 7 including the connection part which faces the edge part end surface of this. The pair of molds is a mold for forming a deep foundation,
The inner dimension of the reinforcing member is larger than the thickness dimension of the discarded formwork,
The formwork structure according to claim 8, wherein the discarded formwork is arranged to be biased outward in the reinforcing member. The pair of molds is a mold for forming a deep foundation,
In order to form a base portion that is disposed under the deep foundation portion, a vertical frame and a horizontal frame that are installed in an intersecting state with each other;
The formwork structure according to claim 8, further comprising a support for supporting the horizontal discard frame above a lower end height of the discard mold. The material of the discarded mold frame, the vertically discarded frame, and the horizontal discarded frame is a foam-based heat insulating material,
The support is engaged directly or indirectly with a lower end portion of the discard frame, and protrudes from the engagement portion toward the vertical discard frame, and supports the horizontal discard frame from below. The formwork structure according to claim 10, further comprising: a projecting portion that extends and a fixing portion that extends upward from the projecting portion and is pierced by the horizontal discard frame. A reinforcing tool attached to the edge of a rectangular plate-shaped discarded mold frame for placing concrete, for increasing the bending strength of the discarded mold frame,
A pair of abutting portions provided to abut both sides of the edge of the discarded mold frame and sandwich the edge of the discarded mold frame;
Connecting the abutting portion, and a connecting portion facing an edge end surface of the discard mold,
At least one of the contact portion and the connecting portion extends along an edge of the discard mold frame. The inner dimension of the connecting portion is larger than the thickness dimension of the discarded mold frame,
The reinforcing member for a discarded mold according to claim 12, wherein one of the pair of contact portions constitutes a leaf spring that is biased toward the other side. Both the abutting part and the connecting part extend along the edge of the discarded mold frame,
The throwaway according to claim 12 or 13, wherein a slit is provided at a boundary portion between the connecting portion and the contact portion located at a longitudinal end portion for connection with another adjacent reinforcing tool. Reinforcing tool for formwork.   The throwaway mold reinforcement tool according to any one of claims 12 to 14, wherein a screw hole is provided at a longitudinal end portion of the connection portion for connection with another adjacent reinforcement tool.

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