JP2018105037A - Concrete assembly structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete assembly structure having excellent workability.SOLUTION: The concrete assembly structure comprises: vertical wall portions 2 installed on both sides, a form member 7 made of a precast concrete that is stretched between upper portions of the vertical wall portions 2, and a top plate portion 3 comprising the form member 7 and a placed concrete portion 8 formed by placing concrete on the form member 7. A perforated plate member 24 is firmly integrated with the placed concrete portion 8 by installing a longitudinally extending perforated plate member placed on the upper surface portion 2J of the vertical wall portion 2 at the end portion in a longitudinal direction of the form member 7 and by installing a plurality of the perforated plate members 24 at intervals in a width direction of the form member 7. Further, the overlapping portion between the form member 7 and the vertical wall portion 2 can be narrowed by placing the perforated dowel 24 on the upper surface portion 2J, so that a cover of reinforced steel embedded in the inner surface 2N side of the vertical wall portion 2 can be reduced, and, therefore, the reinforcement with a reinforced steel is structurally effective.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a concrete assembly structure such as a box culvert or a bridge constructed using a precast concrete member and a cast-in-place concrete.

  Conventionally, as this type, a precast concrete member composed of a leg member projecting in an orthogonal direction from a lower position of a wall member (corresponding to a vertical wall portion), and a horizontal surface placed on the top of the upper end position of the wall member. The sheath pipe is embedded in the wall member so that the opening is exposed at the top portion at the connecting portion with the precast concrete member in the direction, and a reinforcing bar fixed to the wall member is arranged on one end side of the sheath pipe. The reinforcing bar is connected to a horizontal member (corresponding to the formwork member) or a reinforcing reinforcing bar arranged on the horizontal member and extending outwardly, and in this connected state, the sheath pipe is filled with mortar, There is a precast concrete assembly structure (for example, Patent Document 1) in which a top upper portion of a wall member and a side portion and / or an upper portion of a horizontal member are integrated with concrete. In the sheet assembly structure, an overhang receiving portion that protrudes inward is provided on the top of the wall member, and the end of the floor slab is placed on the overhang receiving portion, and the concrete is placed on the floor slab in the field. To cast.

  Also, after placing a concrete floor slab (corresponding to the formwork member) on the top of the concrete block, the reinforcing bars are bound and the top plate part (corresponding to the vertical wall part) is placed into the concrete block. There is a concrete block that integrates the part (for example, Patent Document 2).

  In the above Patent Documents 1 and 2, in order to place the end portion of the formwork member on the upper surface of the vertical wall portion, an overhang receiving portion having a substantially triangular cross section is provided at the top of the vertical wall portion. There is a problem that the form of the vertical wall is complicated. In order to enhance the reinforcing effect of the reinforcing bars, it is preferable to embed the reinforcing bars at a position close to the inner surface of the vertical wall part. When the upper part of the reinforcing bar protrudes from the upper surface of the vertical wall part for connection, the protruding part Since the part which mounts the edge part of a formwork member becomes narrow with the rebar which performed, it will be necessary to provide the said overhang | projection receiving part.

  Further, in the above-mentioned Patent Documents 1 and 2, in order to integrate the cast-in-place concrete placed on the upper part of the formwork member and the formwork member, a vertical reinforcing bar is provided on the upper surface of the formwork member. Although a plurality of protrusions are provided, there is a problem that work is complicated because a gibber reinforcing bar is required in addition to the reinforcing reinforcing bar depending on the design conditions.

  Further, in Patent Document 1, in order to connect a reinforcing bar embedded in a wall member and a reinforcing bar embedded in a site-cast concrete part, a sheath pipe is embedded in the wall member, and the reinforcing bar embedded in the wall member and the site-cast concrete are connected. The reinforcing bars embedded in the sheath pipe are overlapped in the sheath pipe, and the sheath pipe is filled with mortar, thereby connecting both the reinforcing bars, and the manufacturing process of the wall member is increased by the sheath pipe.

  On the other hand, mechanical joints are used for joining the reinforcing bars, and in the reinforcing bar joint device that connects the opposing ends of the two reinforcing bars, it has a substantially cylindrical shape and is surrounded by at least one end. There are a plurality of presser parts divided in the direction, and the inner periphery of these presser parts is formed with a locking projection that hits the outer periphery of the reinforcing bar. And a reinforcing bar joint device (for example, Patent Document 3) having a taper thread portion on the inner periphery and screwed to the presser portion of the coupler. When a joint is used, the connection strength can be secured, but there is a problem that the cost increases.

  By the way, a pair of left and right upper side parts integrally having upper and lower side walls constituting the upper part from the center height positions of the left and right side walls and left and right top plate parts from the upper end of the side wall to the vicinity of the upper end of the partition wall. A pair of lower left and right sides integrally including a block and lower half portions of each side wall constituting the lower portion from the center height position of each of the left and right side walls, and left and right bottom plate portions from the lower end of the side wall to the lower end of the partition wall A cross section integrally including a part constituting block, a partition, a top plate overhanging part forming a part of the top plate on both upper ends of the partition, and a bottom plate overhanging part forming a part of the bottom plate on both lower ends of the partition Is a rectangular box-shaped multiple box culvert (for example, Patent Document 4) which is formed by connecting the blocks to each other.

  As in the case of the box culvert, the central partition may be formed thinner than both side walls due to the earth pressure, etc., and when the end of the mold member is placed on the upper end of the partition, the width of the upper end Therefore, if there is no overhang receiving portion, the construction work of the formwork member is likely to be restricted.

JP 2007-146541 A JP 2000-204643 A JP-A-7-82841 Utility Model Registration No. 3127563

  In view of the above-described problems, an object of the present invention is to provide a concrete assembly structure excellent in workability.

  In order to achieve the above object, the invention according to claim 1 includes a vertical wall portion provided at intervals, a precast concrete formwork member spanned between upper portions of the vertical wall portion, and In a concrete assembly structure comprising: a formwork member and a top plate part formed by placing concrete on the formwork member; and a longitudinal end portion of the formwork member In addition, a vertical perforated plate member placed on the upper surface of the vertical wall portion is provided, and a plurality of the perforated plate members are provided at intervals in the width direction of the mold member. To do.

  According to a second aspect of the present invention, a plurality of reinforcing reinforcing bars are provided on the upper surface of the formwork member, and a perforated dowel having a plurality of holes arranged in the length direction is provided, and the plurality of reinforcing reinforcing bars and A perforated gibber is embedded in the cast concrete part.

  The invention according to claim 3 is characterized in that a plurality of the formwork members are arranged in the width direction, and the rebars in the width direction are inserted through the holes of the perforated dowels of the formwork members adjacent in the width direction. And

  The invention according to claim 4 is characterized in that a stud dowel is provided at an end portion in the length direction of the mold member.

  The invention according to claim 5 is characterized in that the perforated plate member is provided with an extension portion projecting outward in the length direction.

  The invention according to claim 6 is characterized in that a rebar in the length direction is embedded in the lower side of the cross section of the mold member, and an end portion of the rebar is fixed to an end portion in the length direction of the mold member. To do.

  The invention according to claim 7 is characterized in that a reinforcing bar in the length direction is embedded in the lower part of the cross section of the formwork member, and an end of the reinforcing bar is fixed to the placing concrete part.

  According to an eighth aspect of the present invention, a vertical wall portion reinforcing bar is provided on the vertical wall portion, and an upper portion of the wall portion reinforcing bar protrudes from an upper surface of the vertical wall portion, and an upper folded portion is formed on the upper portion of the wall portion reinforcing bar. A falling part is provided in the reinforcing bar provided in the placing concrete part, a lower folded part is provided below the falling part, the lower folded part is disposed under the upper folded part, and the wall part A reinforcing bar and the falling portion are overlapped.

  According to the configuration of the first aspect, the formwork member and the placing concrete portion can be integrated by the perforated plate member. In addition, by placing the perforated plate member on the top surface, the overlapping part of the formwork member and the vertical wall part can be narrowed, thereby reducing the cover of the reinforcing steel bars embedded in the vertical wall part, In particular, reinforcement with reinforcing bars is effective.

  According to the structure of Claim 2, the quantity of a reinforcing bar can be reduced and workability can be improved by using a perforated gibber.

  According to the structure of Claim 3, reinforcement | strengthening of the integration of the formwork member adjacent to the width direction can be aimed at.

  According to the configuration of the fourth aspect, the formwork member and the placing concrete portion can be integrated by the stud gibber.

  According to the structure of Claim 5, integration with a formwork member and a placement concrete part can be aimed at by an extension part.

  According to the configuration of claim 6, when a load is applied to the mold member, the lower section of the cross section of the mold member becomes a tensile region, and the cross-sectional performance is improved by the reinforcing bars in the length direction opposing the tensile force generated thereby. .

  According to the configuration of claim 7, when a load is applied to the mold member, the lower section of the cross section of the mold member becomes a tensile region, and the cross-section performance is improved by opposing the tensile force generated thereby to the reinforcing bars in the length direction. .

  According to the structure of Claim 8, the reinforcing bar of a vertical wall part and the reinforcing bar of a placement concrete part can be connected, without using a mechanical coupling etc.

BRIEF DESCRIPTION OF THE DRAWINGS It is whole explanatory drawing which shows Example 1 of this invention. It is a perspective view of a corner part same as the above. It is sectional drawing of a corner part same as the above. It is an enlarged sectional view of a corner part same as the above. It is a sectional view of the upper part of a central vertical wall part same as the above. It is sectional drawing of the width direction of a formwork member same as the above. It is a perspective view of the corner | angular part which shows Example 2 of this invention. It is sectional drawing of a corner part same as the above. It is a sectional view of the upper part of a central vertical wall part same as the above. It is whole explanatory drawing which shows Example 3 of this invention.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  1 to 7 show Embodiment 1 of the present invention. As shown in FIG. 1, a concrete assembly structure 1 (hereinafter, “structure 1”) includes a pair of left and right vertical wall portions 2, 2 provided at intervals in the width direction, and an upper portion of the vertical wall portions 2, 2. And a bottom plate portion 4 provided between the lower portions of the vertical wall portions 2 and 2. In this example, the top plate portion 3 is interposed between the pair of left and right vertical wall portions 2. A central vertical wall portion 5 that supports the center of the plate portion 3 is provided.

  The vertical wall portion 2 and the top plate portion 3 are joined at a corner portion 6 formed at a joint portion between the upper end of the vertical wall portion 2 and the side end of the top plate portion 3. Further, the central vertical wall portion 5 and the top plate portion 3 are joined at a joint portion between the upper end of the central vertical wall portion 5 and the side end of the top plate portion 3.

  The top plate portion 3 includes left and right mold member members 7, 7 spanning the upper portions of the vertical wall portions 2, 2 and the central vertical wall portion 5, and the upper part of the left and right mold member members 7, 7. And a cast concrete portion 8 formed by casting concrete.

  The vertical wall portion 2 is provided with a longitudinal inner rebar 11 and an outer rebar 12, the inner rebar 11 is embedded close to the inner surface 2N side of the vertical wall portion 2, and the outer rebar 12 is a vertical wall. The portion 2 is buried close to the outer surface portion 2G side. The outer reinforcing bar 12 is a wall reinforcing bar. And the upper part of the said inner surface part 2N is formed flat, and the overhang | projection receiving part is not provided.

  As shown in FIG. 3, the upper part of the inner reinforcing bar 11 protrudes upward from the upper surface part 2J of the vertical wall part 2, and the upper end 11 </ b> T of the inner reinforcing bar 11 is close to the upper surface of the placing concrete part 8. It extends to the position. On the other hand, the upper part of the outer rebar 12 protrudes upward from the upper surface part 2J, and a loop part 13 which is an upper folded part folded back in a substantially U shape is provided at the upper end thereof. The loop part 13 has a semicircular shape. It has a bent portion 13K, and the tip portion 13S of the loop portion 13 is a free end.

  The formwork member 7 includes a flat plate member 9 having a substantially constant thickness, and the flat plate member 9 has a substantially rectangular planar shape that is long in the width direction of the structure 1 and short in the length direction of the structure 1. Eggplant. The flat plate member 9 is made of precast concrete. A plurality of tensile reinforcing bars 14 in the length direction of the mold member 7 (in the left-right width direction of the structure 1) are embedded in the lower part of the cross section of the mold member 7 with an interval in the width direction. Also, a plurality of inner reinforcing bars 11 and outer reinforcing bars 12 are embedded at intervals in the width direction.

  An end steel plate 23 serving as an end plate is provided on the outer end surface 21 and the inner end surface 22 in the length direction of the flat plate member 9, and the end steel plate 23 is fixed to the flat plate member 9. On the outer surface of the end steel plate 23, a plurality of perforated gibber steel plates 24 as perforated plate materials are provided at intervals in the width direction of the mold member 7 (length direction of the structure 1). In the following description, unless otherwise specified, the length direction is the length direction of the mold member 7, and the width direction is the width direction of the mold member 7. In this case, as shown in FIG. 2, in a state where the lower surface on the outer end surface 21 side of the flat plate member 9 is placed on the upper surface portion 2J, the gibber steel plate 24 is interposed between the inner reinforcing bars 11 adjacent to each other in the width direction. The gibber steel plate 24 is provided on the flat plate member 9 so as to be positioned. Further, a plurality (two) of the inner reinforcing bars 11 are located between the adjacent gibel steel plates 24, 24, and the gibel steel plates 24 are arranged close to one side of the inner reinforcing bar 11.

  The perforated gibber steel plate 24 has a substantially rectangular shape in which the vertical direction is larger than the horizontal direction, and has a hypotenuse portion 24N in which an upper outer corner portion is notched. Further, the thickness direction of the perforated gibber steel plate 24 is arranged along the length direction, and is integrally provided on the end steel plate 23 by welding or the like. In addition, a hole 25 is formed at a substantially central position in the lateral direction of the perforated gibber steel plate 24 and above the center in the vertical direction. Furthermore, the lower edge 24S of the perforated gibber steel plate 24 is provided flush with the lower surface of the flat plate member 9. The lower edge 24S is a grounding portion. Further, the reinforcing bars 25 </ b> T in the width direction are inserted into the holes 25 of the plurality of perforated gibber steel plates 24. The reinforcing bars 25T are inserted into the holes 25 of the perforated gibber steel plates 24 of the formwork members 7, 7... Adjacent in the width direction.

  As shown in FIG. 3, with the upper surface portion 2J placed on the lower surface of the end portion of the flat plate member 9, a headed stud dowel 26 is provided between the adjacent inner reinforcing bars 11, 11, and this stud A plurality of the gibels 26 are arranged at intervals in the vertical direction and the width direction, fixed to the outer surface of the end steel plate 23, and projecting laterally outward. The stud gibber 26 is disposed close to the other side of the inner reinforcing bar 11.

  As shown in FIG. 4, a plurality of anchor steel plates 27 serving as anchor plates are provided on the inner surface of the end steel plates 23, and holes 28 are formed in the anchor steel plates 27. The rebar 28T in the width direction is inserted through the cable. Thus, by embedding the anchor steel plate 27 and the reinforcing bar 28T in the flat plate member 9, the end steel plate 23 is fixed to the end surface of the flat plate member 9, and the anchor steel plate 27 and the reinforcing bar 28T constitute the anchor means 29. Yes.

  An end portion of the tensile reinforcing bar 14 is inserted through the end steel plate 23 and protrudes to the outside, and the inserted end portion 14T has a female screw portion (not shown), and a bolt serving as a fixing tool on the female screw portion. By screwing 30, the end portion 14 </ b> T is fixed to the end steel plate 23.

  As shown in FIG. 5, the central vertical wall portion 5 is provided with the inner reinforcing bars 11 on the left and right both sides, respectively, and the inner reinforcing bar 11 is close to both outer surface portions 5G and 5G of the central vertical wall portion 5. It is buried. Further, the upper portion of the inner reinforcing bar 11 protrudes upward from the upper surface portion 5J of the central vertical wall portion 5, and the upper end extends to a position close to the upper surface of the placing concrete portion 8. And the upper end 11T of the inner side reinforcement 11 is bound by binding tools, such as the length direction reinforcement 51 mentioned later, and a wire. Further, the upper end 11T of the inner reinforcing bar 11 shown in FIG. 3 is also bound by a longitudinal reinforcing bar 51 and a binding tool, which will be described later. An example of the wire used for the binding tool is an annealed iron wire.

  Further, the inner end face 22 side of the flat plate member 9 of the mold member 7 is placed on the upper surface portion 5J of the central vertical wall portion 5. Similar to the outer end face 21 side, an end steel plate 23, a perforated gibel steel plate 24, anchor means 29, and bolts 30 are provided. Then, in a state where the lower surface on the inner end surface 22 side of the flat plate member 9 is placed on the upper surface portion 5J, the gibber steel plate 24 on the inner end surface 22 side is positioned between the adjacent inner reinforcing bars 11 and 11. A gibber steel plate 24 is provided on the end steel plate 23. Further, a plurality of (two) inner reinforcing bars 11 and 11 are positioned between adjacent gibber steel plates 24 and 24 on the inner end face 22 side, and the gibber steel plates 24 are arranged close to one side of the inner reinforcing bar 11. Has been.

  As shown in FIGS. 2 and 6, a longitudinal perforated divel 31 is provided on the upper surface of the flat plate member 9 of the formwork member 7, and as shown in FIG. It is arranged at the center in the width direction. This perforated gibber 31 is a factory-embedded steel material, and is integrally provided with a plate-like bottom portion 32 and a plate-like vertical portion 33 projecting upward from the center in the width direction of the bottom portion 32, and has a cross-sectional view. It has an inverted T shape. Then, the bottom 32 side is embedded and fixed in the flat plate member 9, and a plurality of holes 34 are formed in a portion protruding from the upper surface of the flat plate member 9 of the vertical portion 33. It is arranged at intervals in the vertical direction. Further, the reinforcing bar 34T in the width direction is inserted into the hole 34 of the perforated gibber 31 of the formwork members 7, 7.

  As shown in FIG. 6, width direction reinforcing bars 36 are embedded in the flat plate member 9 along the plurality of tensile reinforcing bars 14, and a plurality of width direction reinforcing bars 36 are arranged at intervals in the length direction. 14 and a binding tool (not shown) such as a wire. Further, PC steel materials 37 and 37A in the length direction are respectively arranged above and below the tensile reinforcing bar 14 and the width direction reinforcing bar 36, and the upper and lower PC steel materials 37 and 37A are arranged at the position of the tensile reinforcing bar 14. The PC steel materials 37 and 37A are fixed to the end surface of the flat plate member 9 with a tensile force applied by a pre-tension method if necessary. A necessary amount of pretension is introduced into the PC steel materials 37 and 37A according to design conditions.

  As shown in FIGS. 2 and 6, on the upper surface of the flat plate member 9, there are protruded upper portions of shear reinforcing bars 41 and 41 as reinforcing reinforcing bars which form a pair with a gap in the width direction. A plurality of pairs of reinforcing reinforcing bars 41 are arranged at intervals in the length direction. Lower portions of the shear reinforcing bars 41 and 41 are embedded in the flat plate member 9, and lower ends of the pair of shear reinforcing bars 41 and 41 are connected by a lateral portion 42. In addition, a loop portion 43 serving as an upper folded portion is provided on the upper portion of the shear reinforcing bar 41, and the loop portion 43 is bent inward in the width direction. In addition, the reinforcing bar frame part 44 which has the shear reinforcement reinforcing bars 41 and 41 and the horizontal part 42 which make a pair by one reinforcing bar is formed. Further, the lateral portion 42 is disposed so as to follow the lower portions of the plurality of tensile reinforcing bars 14.

  A plurality of longitudinal rebars 51 are arranged on the upper surface side at intervals in the width direction in the placement concrete portion 8, and the longitudinal rebars 51 overlap with the longitudinal rebars 51 in the length direction. A plurality are arranged at intervals. Further, the length direction reinforcing bars 51 and the width direction reinforcing bars 52 are bound by a binding tool (not shown) at the intersection. The longitudinal reinforcing bars 51 are provided continuously on the left and right vertical wall portions 2 and 2. In addition, the length direction reinforcing bar 51 and the width direction reinforcing bar 52 are the upper reinforcing bars embedded in the placing concrete portion 8.

  A longitudinal connecting reinforcing bar 53 is provided between the shear reinforcing reinforcing bar 41 and the longitudinal reinforcing bar 51. The connecting reinforcing bar 53 is provided with an upper loop part 54 as an upper folded part at the upper part and a lower loop part 55 as a lower folded part at the lower part, and the upper loop part 54 is hooked on the longitudinal reinforcing bar 51, An overlapping portion 56 is formed by overlapping the lower loop portion 55 with the shear reinforcing bar 41. Further, the upper and lower loop portions 54 and 55 of the overlapping portion 56 are bound by a binding tool.

  As shown in FIG. 3, at the end of the length reinforcing bar 51, a downward bent portion 57 is provided, a falling portion 57A is provided downward from the bent portion 57, and a lower portion of the falling portion 57A is provided. A loop portion 58 serving as a lower folded portion is provided. The loop portion 58 has a semicircular bent portion 58K, and a tip portion 58S of the loop portion 58 is a free end.

Then, the vertical portion of the loop portion 58 and the vertical portion of the loop portion 13 which is the upper bent portion are overlapped, and the overlapping portion is bound by a binding tool such as a wire, and the tip portions 58S and 13S are brought close to each other. The joint portion 60 is constituted by the loop portions 13 and 58. The bent portions 13K and 58K are bent to one side in the length direction.

  Three (a plurality) of reinforcing bars 59, 59, 59 in the width direction are arranged inside the bent parts 13K, 58K of the loop parts 13, 58, respectively, and these reinforcing bars 59, 59, 59 are arranged in the width direction. The plurality of mold members 7 and 7 are arranged on the plurality of loop portions 13 and 58.

  Next, the construction method of the structure 1 will be described. First, the formwork is assembled, and the bottom plate portion 4, the left and right vertical wall portions 2, 2 and the central vertical wall portion 5, which are lower structures, are constructed from cast-in-place concrete. A precast concrete member may be used for the whole or part of the lower structure.

  Thereafter, the frame members 7, 7 are spanned between the vertical wall portions 2, 2 on both sides and the upper portion of the central vertical wall portion 5, and the width direction end faces 7T, 7T of the mold frame members 7, 7 are abutted together to form the structure. Arrange without gaps in the length direction of 1. In this case, since the plurality of gibber steel plates 24 are placed on the upper surface portions 2J and 5J even if the overlap margin between the lower surfaces of the end surfaces 21 and 22 and the upper surface portions 2J and 5J of the mold member 7 is small, the mold member 7 can be stably placed between the vertical wall portions 2 and 5. Accordingly, the vertical wall portions 2 and 5 do not require a conventional overhang receiving portion, and the mold work is facilitated.

  Moreover, in the corner part 6, after connecting the outer reinforcement 12 of the vertical wall part 2, and the length direction reinforcement 51 arrange | positioned in the placement concrete part 8 using the upper and lower loop parts 54 and 55, Since the cast-in concrete part 8 is formed of cast-in-place concrete, reinforcing bars can be connected without using a conventional mechanical joint. In addition, before concrete placement, after all the reinforcing bar arrangement | positioning work in the placement concrete part 8 is completed, a spot cast concrete is cast.

  Further, the shear reinforcing bar 41 of the mold member 7 is connected to the length direction reinforcing bar 51 and the width direction reinforcing bar 52 which are upper bars by a connecting bar 53. In this case, in addition to the shear reinforcing bar 41, by providing the perforated gibble 31 on the upper surface of the flat plate member 9, it is possible to achieve integration that prevents the mold member 7 and the placing concrete portion 8 from being displaced, Providing the perforated gibber 31 eliminates the need for a gibber reinforcing bar or the like for integration, thereby reducing the work of bar arrangement on site.

  Furthermore, since the end of the mold member 7 is provided with the gibber steel plate 24 and the stud gibber 26, the mold member 7 and the cast concrete part 8 can be integrated.

  Further, when a load is applied to the top plate part 3 after the construction, the lower section of the formwork member 7 becomes a tensile region. On the other hand, both ends of the tensile reinforcing bar 14 are fixed to the end steel plate 23 by bolts 30. Therefore, the tensile reinforcing bar 14 opposes the tensile force. Further, as shown in FIGS. 3 and 5 and the like, since the ends of the tensile reinforcing bars 14 are fixed by the bolts 30, there are few protruding portions on the end surface of the formwork member 7, and workability when the formwork member 7 is installed. Becomes better.

  In this way, in this embodiment, corresponding to claim 1, the vertical wall portions 2 and 5 provided at intervals and the precast concrete mold laid between the upper portions of the vertical wall portions 2 and 5 are used. In a concrete assembly structure 1 comprising a frame member 7 and a top plate portion 3 composed of a formwork member 7 and a placement concrete portion 8 formed by placing concrete on the formwork member 7, At the end in the longitudinal direction of the mold member 7, a perforated gibber steel plate 24 as a perforated plate member in the vertical direction placed on the upper surface portions 2J and 5J of the vertical wall portions 2 and 5 is provided. Since a plurality of 24 are provided at intervals in the width direction of the mold member 7, the perforated gibber steel plate 24 can be integrated with the mold member 7 and the placing concrete portion 8. Further, by placing the perforated gibber steel plate 24 on the upper surface portions 2J and 5J, the overlapping portion between the mold member 7 and the vertical wall portions 2 and 5 can be narrowed, thereby being embedded in the vertical wall portions 2 and 5. It is possible to reduce the covering of the inner reinforcing bar 11 as the reinforcing reinforcing bar, and the reinforcing by the reinforcing bar 11 is structurally effective.

  As described above, in this embodiment, corresponding to claim 2, the shear reinforcement bar 41 as a plurality of reinforcement bars protrudes from the upper surface of the mold member 7, and the plurality of holes 34 arranged in the length direction are provided. Since the perforated divel 31 is provided and the plurality of shear reinforcing bars 41 and the portion of the perforated gibel 31 that protrudes from the upper surface of the formwork member 7 are embedded in the placing concrete portion 8, the perforated divel 31 is used. The gibber rebar is no longer needed, reducing the amount of rebar and improving workability.

  Thus, in this embodiment, corresponding to claim 3, a plurality of mold members 7 are arranged in the width direction, and the holes 34 of the perforated gibels 31, 31 of the mold members 7, 7 adjacent in the width direction, Since the rebar 34T in the width direction is inserted into the width direction 34, the integration of the formwork members 7 and 7 adjacent in the width direction can be strengthened.

  As described above, in this embodiment, the stud gibber 26 is provided at the end in the length direction of the mold member 7 in correspondence with the fourth aspect. Can be integrated.

  Thus, in the present embodiment, corresponding to claim 6, the reinforcing bar 14 in the length direction is embedded on the lower side of the cross section of the mold member 7, and the end 14T of the reinforcing bar 14 is secured to the mold member 7 by the bolt 30. When the load is applied to the mold member 7, the lower section of the cross section of the mold member 7 becomes a tensile region, and the tensile force generated thereby is reinforced by the reinforcing bar 14. The cross-sectional performance is improved by countering.

  Thus, in this embodiment, corresponding to claim 8, the vertical wall portion 2 is provided with the outer reinforcing bar 12 as the vertical wall portion reinforcing bar, and the upper portion of the outer reinforcing bar 12 is formed on the upper surface portion 2J of the vertical wall portion 2. A loop portion 58 as an upper folded portion is provided at the upper portion of the outer reinforcing bar 12, and a falling portion 57A is provided on the reinforcing bar 51 provided on the placing concrete portion 8, and a lower folded portion is provided below the falling portion 57A. Since the loop portion 13 is provided and the loop portion 58 is disposed below the loop portion 13 and the inner rebar 11 and the falling portion 57A are overlapped, the outer rebar 12 of the vertical wall portion 2 is used without using a mechanical joint or the like. And the longitudinal direction reinforcing bar 51 of the placing concrete part 8 can be connected.

  Hereinafter, as an effect on the embodiment, a plurality of rebars 59, 59, 59 in the width direction are arranged in the joint portion 60, and a plurality of formwork members 7, in which the rebars 59, 59, 59 are arranged in the width direction, 7 is arranged in the plurality of loop portions 13 and 58, the length direction reinforcing bar 51 and the outer reinforcing bar 12 can be integrated.

  Further, since the perforated gibber steel plate 24 is positioned between the inner reinforcing bars 11, the overlapping width between the lower end surface of the flat plate member 9 and the upper surface portion 2J of the vertical wall portion 2 can be reduced. Furthermore, the end steel plate 23 can be integrated with the end surface of the flat plate member 9 by the anchor means 29 including the anchor steel plate 27 and the reinforcing bars 28T. Further, the perforated gibber 31 has a plurality of holes 34 in the length direction, and by inserting the reinforcing bars 34T into the plurality of holes 34, the formwork members 7, 7. It can be strengthened.

  7 to 9 show a second embodiment of the present invention, in which the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In this example, the end plate 21 is not provided on the outer end surface 21 and the inner end surface 22, but a dowel steel plate is provided. Further, the ends of the tensile reinforcing bars 14 are fixed by a fixing structure different from that of the first embodiment.

  The perforated gibber steel plate 61 of this embodiment is formed higher than the perforated gibber steel plate 24. The lower edge 61S of the perforated gibber steel plate 61 having the holes 25 is provided flush with the lower surface of the flat plate member 9. Further, the anchor steel plate 27 embedded in the flat plate member 9 is integrally provided in the gibber steel plate 61, and the rebar 28 </ b> T is inserted into the holes 28 of the plurality of anchor steel plates 27. The anchor steel plate 27 and the reinforcing bar 28T constitute the anchor means 29.

  On the upper side of the perforated gibber steel plate 61, an extension steel member 62 as a lateral extension plate member is integrally provided, and the loop member 58 is overlapped with the outer end of the extension steel member 62 so as to come close thereto. Has been. Holes 63, 63 are formed on both ends of the extended steel material 62, and reinforcing bars 63T, 63T in the width direction are inserted into the holes 63, 63 on both sides, respectively. The outer reinforcing bar 63T is inserted into the loop part 58, and the extension steel material 62 and the joint part 60 are integrated. And the rebar 63T, 63T of the width direction is penetrated by the holes 63, 63 of the formwork members 7,7 ... adjacent to the width direction.

  Further, an end portion 14T of the tensile reinforcing bar 14 is provided so as to project laterally from the outer end surface 21, and the end portion 14T of the tensile reinforcing bar 14 is bound to the inner reinforcing bar 11 by a binding tool. The end portion 14T protruding from the outer end surface 21 is a fixing portion, and the end portion 14T is embedded in the placing concrete portion 8, so that the end portion 14T of the tensile reinforcing bar 14 is fixed to the placing concrete portion 8. Is done.

  As shown in FIG. 9, the lower surface on the inner end surface 22 side of the flat plate member 9 of the mold member 7 is placed on the upper surface portion 5J of the central vertical wall portion 5. On the inner end surface 22 of the flat plate member 9, a plurality of perforated gibber steel plates 61 as perforated plate materials are provided at intervals in the width direction. In a state where the lower surface on the inner end surface 22 side of the flat plate member 9 is placed on the upper surface portion 5J, the gibel steel plate 61 is provided so that the gibel steel plate 61 is positioned between the adjacent inner reinforcing bars 11, 11. Yes. In addition, two inner reinforcing bars 11, 11 are located between the adjacent dowel steel plates 61, 61 on the inner end face 22, and the gibel steel plates 61 are arranged close to one side of the inner reinforcing bar 11. Further, the reinforcing bars 63T in the width direction are inserted through the holes 63 of the plurality of perforated gibber steel plates 61. In this case, a rebar 63T in the width direction is inserted into the hole 63 of the mold members 7, 7... Adjacent in the width direction. Further, in FIG. 9, an end portion 14 </ b> T of the tensile reinforcing bar 14 protruding to the outside from the flat plate member 9 is a fixing portion of the tensile reinforcing bar 14.

  The end of the tensile reinforcing bar 14 on the inner end surface 22 side includes a lateral portion 65 projecting laterally outward from the inner end surface 22, and an upward bent portion 66 provided at an end portion of the lateral portion 65. The loop portion 67 is an upper folded portion extending upward from the bent portion 66, and the bent portion 66 of the loop portion 67 is bent outward (outer end surface 21 side).

  The vertical portions of the left and right loop portions 67 and 67 are overlapped, and the overlapped portions are bound by a binding tool. In this case, since the overlapped portion is relatively long, it is not always necessary to use a tying tool, but it is preferable to tie it to prevent deviation.

  As described above, in this embodiment, the same operations and effects as the above-described embodiments are obtained.

  Further, in this example, an extension steel material 62 that is an extension portion is integrally provided on the upper side of the perforated gibber steel plate 61, the outer end of the extension steel material 62 is overlapped with the loop portion 58, and the inside of the extension steel material 62 is By providing holes 63, 63 on the end side and the outer end side, inserting reinforcing bars 63T, 63T in the width direction through these holes 63, 63, and inserting the reinforcing bars 63T on the outer end side into the loop portion 58. The extension steel material 62 and the joint part 60 can be integrated.

  As described above, in this embodiment, in correspondence with claim 5, the perforated gibel steel plate 61, which is a perforated plate member, is provided with the extended steel material 62 that is an extended portion projecting outward in the length direction. The formwork member 7 and the cast-in concrete part 8 can be integrated.

  Thus, in this embodiment, corresponding to claim 7, the longitudinal reinforcing bar 14 is embedded in the lower section of the mold member 7 and the end 14T of the reinforcing bar 14 is fixed to the placing concrete part 8. Therefore, when a load is applied to the mold member 7, the lower section of the cross section of the mold member 7 becomes a tensile region, and the rebar 14 opposes the tensile force generated thereby, thereby improving the cross-sectional performance.

  FIG. 10 shows a third embodiment of the present invention. The same reference numerals are given to the same portions as those of the above-described embodiments, and detailed description thereof will be omitted. The concrete assembly structure 1 of this example has no central vertical wall portion 5, a formwork member 7 is bridged between the upper portions of the vertical wall portions 2, 2 on both sides, and the top plate portion 3 is constructed by the cast concrete portion 8. doing.

  In this example, the corner portion 6 may adopt the structure of any of the above embodiments.

  Thus, in the present embodiment, the vertical wall portions 2 and 2 provided at intervals, the precast concrete formwork member 7 bridged between the upper portions of the vertical wall portions 2 and 2, and the formwork member 7 and a top plate portion 3 composed of a cast concrete portion 8 formed by placing concrete on the formwork member 7 and exhibit the same actions and effects as the above embodiments.

  The present invention is not limited to this embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, the configurations of the embodiments can be combined as appropriate. For example, in Embodiment 2, the ends of the tensile reinforcing bars may be fixed with bolts, or the fixing portion of Embodiment 2 may be adopted in Embodiment 1. . Further, the vertical wall portion and the bottom slab portion of the assembly structure may be made of precast concrete, or a part thereof may be made of precast concrete and the rest may be made of cast-in-place concrete. Further, an overhang receiving portion may be provided on the upper portion of the vertical wall portion. Various types of reinforcing bar ties can be used. Further, the perforated gibber plate placed on the upper surface may be provided only on one of the end faces of the mold member. Moreover, the overlapping part of reinforcing bars does not need to contact. Further, a deformed reinforcing bar may be used as the reinforcing bar. Further, the position, shape, quantity, and the like of the perforated dive 31 are not limited to the embodiment. For example, a plurality of perforated divels may be provided on the mold member, and the position may be other than the center in the width direction. The shape may be an I shape having only a vertical portion without a bottom portion, or an H shape in which a plate-like upper portion parallel to the bottom portion is provided on the upper portion of the vertical portion. Furthermore, the PC steel material may be given a tension by a post-tension method, or the PC steel material itself may not be contained.

1 Concrete Assembly Structure 2 Vertical Wall 3 Top Plate 4 Bottom Plate 5 Center Vertical Wall (Vertical Wall)
7 Formwork member 8 Casting concrete part 11 Inside reinforcement (reinforcing reinforcement)
12 Outer reinforcement (wall reinforcement)
13 Loop part (upward turn part)
14 Tensile rebar (longitudinal rebar)
23 End steel plate (End plate)
24 perforated steel plate (perforated plate member)
26 Stud Giber 29 Anchor 30 Bolt (Fixing Tool)
31 Drilling bevel 34 Hole 41 Shear reinforcement (reinforcement)
51 Reinforcing bar in the length direction (reinforcing bar provided in the concrete placement)
58 Loop part (lower folded part)
61 Perforated Giber steel plate (Perforated plate member)
62 Extended steel (extension part)

Claims (8)

A vertical wall provided at intervals, and
A precast concrete formwork member spanned between the upper portions of the vertical wall,
A top plate portion comprising the mold member and a cast concrete portion formed by casting concrete on the mold member;
In a concrete assembly structure comprising:
A longitudinal perforated plate member placed on the upper surface of the vertical wall portion is provided at the longitudinal end of the mold member, and the perforated plate member is spaced apart in the width direction of the mold member. A concrete assembly structure characterized by being provided with a plurality. A plurality of reinforcing reinforcing bars are provided on the upper surface of the formwork member, and a perforated dowel having a plurality of holes arranged in the length direction is provided. The concrete assembly structure according to claim 1, wherein the concrete assembly structure is embedded in a portion. 3. The concrete according to claim 2, wherein a plurality of the formwork members are arranged in the width direction, and the reinforcing bars in the width direction are inserted into the holes of the perforated gibels of the formwork members adjacent in the width direction. Assembly structure. The concrete assembly structure according to any one of claims 1 to 3, wherein a stud gibber is provided at an end portion of the mold member in a length direction. The concrete assembly structure according to any one of claims 1 to 3, wherein the perforated plate member is provided with an extending portion that protrudes outward in the length direction. The reinforcing bar in the length direction is embedded in the lower section side of the mold member, and the end of the reinforcing bar is fixed to the end in the length direction of the mold member. A concrete assembly structure according to claim 1. The concrete according to any one of claims 1 to 3, wherein a reinforcing bar in a length direction is embedded in a lower section side of the formwork member, and an end of the reinforcing bar is fixed to the placing concrete part. Assembly structure. The vertical wall part is provided with a vertical wall reinforcing bar, the upper part of the wall part reinforcing bar protrudes from the upper surface of the vertical wall part, the upper folded part is provided on the upper part of the wall part reinforcing bar, and the placing concrete part The steel bar is provided with a falling part, a lower folded part is provided below the falling part, the lower folded part is disposed under the upper folded part, and the wall reinforcing bar and the falling part are disposed. The concrete assembly structure according to any one of claims 1 to 7, wherein the concrete assembly structure is superposed.