JP2017008532A - Concrete structure and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the amount of arranged bars without decreasing strength.SOLUTION: A concrete structure comprises: a first and a second side walls that face to each other; and a top plate, whose one end is connected to one end of the first side wall at substantially right angle and whose the other end is connected to one end of the second side wall at substantially right angle. This concrete structure is manufactured by forming a flat steel bar by integrally connecting arranged steel bars, bending the flat steel bar into substantially C shape, disposing the substantially C-shaped steel bar in a formwork of the concrete structure, and casting concrete inside the formwork. In the concrete structure manufactured in this manner, a first steel bar bent into substantially C shape is arranged across the first side wall, the top plate and the second side wall.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a concrete structure and a manufacturing method thereof, and more particularly, to a concrete structure and a manufacturing method thereof that can reduce the amount of reinforcing bars without reducing strength.

  In recent years, as a road gutter, a free-gradient gutter (variable gutter) in which a bottom wall is constructed on-site using a concrete gutter block precast at a factory has become mainstream (see, for example, Patent Document 1). . The side groove block described in Patent Document 1 is provided with an opening substantially at the center of the top plate, and the opening is closed with a lid made of concrete or porous grating. Such variable side grooves can collect drainage water such as rainwater through a lid or a gap between the lids in a water channel formed by an internal space.

  5 (a) is a cross-sectional view of a culvert portion and a side wall of a conventional side groove block, FIG. 5 (b) is a cross-sectional view of a side wall of a conventional side groove block, and FIG. It is sectional drawing of the top plate of the block for conventional side grooves.

  As shown in FIGS. 5A to 5C, the side groove block 5 includes a top plate 51, an opening 52 provided substantially at the center of the top plate 51, and a first side wall 53 and a second side wall that face each other. 54.

  The top plate 51 includes an opening portion 55 that includes an opening 52, and first and second undercover portions 56 and 57 that do not include the opening 52. One end of the top plate 51 is connected to one end of the first side wall 53 at a substantially right angle, and the other end is connected to one end of the second side wall 54 at a substantially right angle.

  The side groove block 5 has a length of 2000 mm in the longitudinal direction, a width of 500 mm in the lateral direction, and a height of 1245 mm in the vertical direction. Further, as shown in FIG. 5C, the opening portion 55 has a length of 1010 mm in the longitudinal direction of the side groove block 5, and each of the first undercover portion 56 and the second undercover portion 57 is , Has a length of 495 mm in the longitudinal direction.

  As shown in FIGS. 5A and 5B, side wall reinforcing bars 510 are embedded in the first side wall 53 and the second side wall 54, respectively.

  As shown in FIG. 5B, the side wall reinforcing bars 510 are formed by 18 side wall reinforcing bars 501 made of a deformed steel bar of D6 and eight side wall auxiliary bars 503 made of a round steel of φ4. Has been. The 18 side wall main bars 501 are arranged substantially parallel to each other and at substantially equal intervals (in the example shown in FIG. 5B, every 112 mm). The eight side wall accessory bars 503 are arranged substantially parallel to each other and at substantially equal intervals. In the side wall reinforcing bars 510, the 18 side wall main bars 501 and the eight side wall bar bars 503 are coupled in a lattice shape so as to be substantially orthogonal to each other.

  On the other hand, as shown in FIGS. 5 (a) and 5 (c), a culvert rebar 520 is embedded in each of the first culvert portion 56 and the second culvert portion 57.

  FIG. 6 is a diagram illustrating an example of a dark bar rebar embedded in a conventional side groove block.

  As shown in FIG. 6, the undercutting reinforcing bar 520 includes five undercutting main bars 504 made of φ5 round steel, five undercasting lower main bars 505 made of D6 deformed bar steel, and a round steel of φ4. 3 culvert upper auxiliary muscles 506 and four culvert lower auxiliary muscles 507 made of φ4 round steel.

  The five culvert upper main bars 504 are arranged substantially parallel to each other at substantially equal intervals, and the five culvert lower main bars 505 are arranged substantially parallel to each other at substantially equal intervals below the vertical direction. The three culvert upper auxiliary muscles 506 are arranged substantially parallel to each other at substantially equal intervals, and the four culvert lower auxiliary muscles 507 are arranged substantially parallel to each other at substantially equal intervals below the vertical direction. Has been.

  In the culvert bar 520, the five culvert upper major muscles 504 and the three culvert upper minor muscles 506 are joined in a lattice pattern so as to be substantially orthogonal to each other, and the five culvert lower major muscles 505 and the four culvert lower minor muscles. 507 are connected in a lattice shape so as to be substantially orthogonal to each other. Further, in the undercut reinforcing bar 520, the two undercover upper main bars 504 at both ends are bent at substantially right angles and processed into a substantially U-shape. In the undercut reinforcing bar 520, both ends of the undercut upper main reinforcing bar 504 at one end and the undercutting main reinforcing bar 505 at one end are coupled in a substantially rectangular shape so as to be substantially orthogonal to each other. The bent ends and the culvert lower main reinforcement 505 at the other end are joined in a substantially rectangular shape so as to be substantially orthogonal to each other.

  As described above, the undercut reinforcement 520 includes a grid-like reinforcement formed by the long sides of the five undercover upper main bars 504 and the three undercover upper auxiliary bars 506, the undercut main bars 505, and the four undercover main bars 505. The grid-like reinforcing bars formed by the culvert lower secondary reinforcing bars 507 are double reinforcing bars arranged substantially in parallel in two rows.

  Side wall reinforcing bars 510 are provided at positions where the first side wall 53 and the second side wall 54 are formed at the positions where the first side wall 53 and the second side wall 54 of the mold of the side groove block 5 are formed. Each has a dark bar rebar 520. Then, by pouring the concrete into the form of the side groove block 5, the side wall reinforcing bars 510 are respectively connected to the first side wall 53 and the second side wall 54, and the first undercover portion 56 and the second undercover portion 57. The side groove block 5 in which the undercut rebar 520 is embedded is manufactured.

  Accordingly, as shown in FIG. 5B, 18 side wall main bars 501 are provided at substantially equal intervals in each of the first side wall 53 and the second side wall 54, substantially parallel to the vertical direction of the side groove block 5. The eight side wall auxiliary reinforcing bars 503 are arranged at substantially equal intervals substantially parallel to the longitudinal direction of the side groove block 5.

  Each of the first culvert portion 56 and the second culvert portion 57 has five culvert upper main muscles 504 substantially parallel to the lateral direction of the side groove block 5 as shown in FIG. The bars are arranged at substantially equal intervals, and below the vertical direction, five undercarriage lower main bars 505 are arranged at substantially equal intervals substantially in parallel with the lateral direction of the side groove block 5. Further, in each of the first culvert portion 56 and the second culvert portion 57, three culvert upper auxiliary muscles 506 are arranged at substantially equal intervals substantially parallel to the longitudinal direction of the side groove block 5, and the vertical Below the four culvert lower secondary muscles 507 are arranged substantially parallel to the longitudinal direction of the side groove block 5.

  Each of the first undercover 56 and the second undercover 57 has a grid-like shape formed by the long sides of the five undercover upper main muscles 504 and three undercover upper auxiliary muscles 506 arranged vertically above each other. The reinforcing bars correspond to bending stresses generated on the outer sides of the first culvert portion 56 and the second culvert portion 57, respectively. On the other hand, a grid-like reinforcing bar formed by five undercarriage lower main bars 505 and four undercarriage lower auxiliary bars 507 arranged vertically below each of the first undercarriage part 56 and the second undercarriage part 57. Corresponds to the bending stress generated inside each of the first culvert portion 56 and the second culvert portion 57.

  As described above, the side groove block 5 includes 36 side wall principal bars 501, 16 side wall side muscles 503, 10 culvert upper major bars 504, 10 culvert lower major bars 505, and 6 culvert upper side major muscles 506. , And eight culvert upper accessory muscles 507 are arranged in total.

JP-A-2005-290745

  However, in the conventional side groove block 5, since the two side wall reinforcing bars 510 and the two underlay reinforcing bars 520 are separated, many processes are required for processing and assembling these reinforcing bars, and the work load is large. It was. Further, sufficient consideration is required to bury the side wall reinforcing bars 510 while maintaining the vertical accuracy at the positions where the first side wall 53 and the second side wall 54 of the mold of the side groove block 5 are formed. Met.

  In addition, the underlay reinforcing bar 520 is a double bar arrangement with a large amount of reinforcing bars and a complicated arrangement of the reinforcing bars, so that the workability is poor and the cost increases.

  Furthermore, a plurality of side groove blocks 5 having the same length in the longitudinal direction and the same width in the short direction and different heights in the vertical direction are manufactured. In the side wall reinforcing bar 510, the amount of reinforcing bar differs depending on the size of the side groove block 5, but in the undercut reinforcing bar 520, the amount of reinforcing bar is the same regardless of the size of the side groove block 5. It has become. For this reason, in the conventional side groove block 5 in which the two side wall reinforcing bars 510 and the two undercut reinforcing bars 520 are separated, the side wall reinforcing bar 510 having a size different from the desired size is mistaken for the form of the side groove block 5. There was a risk of human error such as placement.

  Moreover, the undercut reinforcing bar 520 is a reinforcing bar adapted to the side groove block 5 having a high height in the vertical direction, that is, the side groove block 5 having a high load so that a common one can be used regardless of the size of the side groove block 5. It has become a quantity. For this reason, in the side groove block 5 having a low vertical height, that is, the side groove block 5 having a low load, the amount of reinforcing bars of the double reinforcing bar 520 having a large amount of reinforcing bars is more than necessary. There was a risk of overcrowding. Such an overcrowded reinforcement causes a filling failure of concrete and generation of bean board (junka).

  This invention is made | formed in order to solve said subject, Comprising: It aims at providing the concrete structure which can reduce the amount of reinforcing bars, and its manufacturing method, without reducing an intensity | strength.

  In order to achieve the above object, a concrete structure according to the first aspect of the present invention has first and second side walls facing each other, one end connected to one end of the first side wall at a substantially right angle, A concrete structure having a top plate connected at one end to the one end of the second side wall at a substantially right angle, and extending over the first side wall, the top plate, and the second side wall. The first reinforcing bar bent in the shape of a letter is arranged.

  In the above-described concrete structure, the top plate includes an opening portion provided with an opening and a culvert portion, and spans the first side wall, the culvert portion, and the second side wall. The first reinforcing bars are arranged, and a plurality of second reinforcing bars are arranged substantially in parallel with the first reinforcing bars at portions of the first and second side walls connected to the opening portions. In addition, the interval between the first reinforcing bars is narrower than the interval between the second reinforcing bars.

  In the concrete structure, a plurality of third reinforcing bars are arranged on each of the first and second side walls so as to be substantially orthogonal to the first reinforcing bars, and are connected to the top plate. An interval between the third reinforcing bars arranged near the portion is narrower than an interval between the third reinforcing bars arranged away from the connecting portion.

  Furthermore, in the concrete structure, a plurality of fourth reinforcing bars are arranged in the underdrain portion so as to be substantially orthogonal to the plurality of first reinforcing bars, and the plurality of first reinforcing bars and the plurality of reinforcing bars are arranged. A grid-like reinforcing bar formed by the fourth reinforcing bar is singlely arranged in the underdrain.

  In order to achieve the above object, a method for producing a concrete structure according to a second aspect of the present invention includes a first and second side walls facing each other, and one end substantially the same as one end of the first side wall. A concrete structure manufacturing method comprising: a top plate connected at a right angle and having the other end connected at a substantially right angle to one end of the second side wall, wherein the reinforcing bars arranged in the concrete structure are coupled to each other. And forming a flat reinforcing bar that is integrated with each other, bending the flat reinforcing bar into a substantially U-shape, and placing the substantially U-shaped reinforcing bar on a formwork of the concrete structure. The concrete structure is manufactured by pouring concrete into the formwork.

  ADVANTAGE OF THE INVENTION According to this invention, the concrete structure which can reduce the amount of reinforcing bars without reducing intensity | strength can be provided.

It is a perspective view which shows the structural example of the side groove block which concerns on this embodiment. (A) is sectional drawing of the underdrain part and side wall of the side groove block which concerns on this embodiment, (b) is sectional drawing of the side wall of the side groove block which concerns on this embodiment, (c) is It is sectional drawing of the top plate of the block for side grooves which concerns on this embodiment. It is a top view which shows the structural example of an integral reinforcing bar. It is sectional drawing which shows the structural example of a haunch muscle. (A) is sectional drawing of the underdrain part and side wall of the conventional side groove block, (b) is sectional drawing of the side wall of the conventional side groove block, (c) is the conventional side groove block It is sectional drawing of a top plate. It is a perspective view which shows the structural example of a culvert bar.

  Hereinafter, a configuration of a side groove block according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view illustrating a configuration example of a side groove block according to the present embodiment.

  The side groove block 1 is made of reinforced concrete or the like, and as shown in FIG. The side groove block 1 is precast at the factory, and the bottom wall is constructed on site. A free-gradient side groove (variable side groove) can be constructed using such a side groove block 1.

  As shown in FIG. 1, the side groove block 1 includes a top plate 11, an opening 12 provided substantially at the center of the top plate 11, and a first side wall 13 and a second side wall 14 that face each other. .

  The top plate 11 includes an opening portion 15 that includes the opening 12, and a first undercover portion 16 and a second undercover portion 17 that do not include the opening 12. One end of the top plate 11 is connected to one end of the first side wall 13 at a substantially right angle, and the other end is connected to one end of the second side wall 14 at a substantially right angle.

  The opening 12 is closed by a lid made of concrete or porous grating (not shown). The variable side groove constructed using such a side groove block 1 can collect drainage water such as rainwater through a lid or a gap between the lids in a water channel formed by an internal space.

  FIG. 2A is a cross-sectional view of the culvert portion and the side wall of the side groove block according to the present embodiment, and FIG. 2B is a cross-sectional view of the side wall of the side groove block according to the present embodiment. 2 (c) is a cross-sectional view of the top plate of the side groove block according to the present embodiment.

  As shown in FIGS. 2A to 2C, the side groove block 1 has a length of 2000 mm in the longitudinal direction, a width of 500 mm in the lateral direction, and a height of 1245 mm in the vertical direction. Have. Moreover, as shown in FIG.2 (c), the opening part 15 has a length of 1010 mm in the longitudinal direction of the side groove block 1, and each of the first undercover part 16 and the second undercover part 17 is , Has a length of 495 mm in the longitudinal direction.

  As shown in FIGS. 2A to 2C, the side groove block 1 is composed of six side wall main bars 101 made of D10 deformed steel bar and a substantially U-shaped steel bar of D10. 10 integrated main bars 102, 16 side wall reinforcing bars 103 made of deformed steel bar D6, and 6 underlay bars 106 made of deformed steel bar D6 are arranged. That is, a total of 38 reinforcing bars are arranged in the side groove block 1, which is less than half the amount of reinforcing bars of the conventional side groove block 5.

  As shown in FIG. 2A, the integral main reinforcement 102 is laid over the first side wall 13, the first culvert part 16 or the second culvert part 17, and the second side wall 14. ing. The integrated main reinforcing bar 102 is connected to the first side wall 13 with a first side wall main reinforcing bar part 102a arranged substantially parallel to the vertical direction of the side groove block 1, and is connected to the first side wall main reinforcing bar part 102a at a substantially right angle. A culvert main muscle portion 102b arranged substantially parallel to the lateral direction of the side groove block 1 and a culvert main muscle portion 102b are connected at a substantially right angle near the vertical center of one culvert portion 16 or the second culvert portion 17. In addition, the second side wall 14 has a second side wall main reinforcing bar portion 102c that is arranged substantially parallel to the vertical direction of the side groove block 1.

  As shown in FIG. 2 (b), the side main bars 101 are substantially parallel to the vertical direction of the side groove block 1 and are connected to the opening portions 15 of the first side wall 13 and the second side wall 14. Three bars are arranged at substantially equal intervals (270 mm in the example shown in FIG. 2B).

  Further, in each of the portions of the first side wall 13 connected to the first underdrain portion 16 and the second underdrain portion 17, the first side wall main reinforcement portion 102a of the integral main reinforcement 102 is in the vertical direction of the side groove block 1. Five bars are arranged in parallel at substantially equal intervals (105 mm in the example shown in FIG. 2B). Furthermore, the second side wall main reinforcement 102c of the integral main reinforcement 102 is connected to the vertical direction of the side groove block 1 at each of the portions of the second side wall 14 connected to the first undercover 16 and the second undercover 17. Five bars are arranged in parallel at substantially equal intervals (105 mm in the example shown in FIG. 2B).

  Of the first side wall 13 and the second side wall 14, the portion connected to the first undercover portion 16 or the second undercover portion 17 has a higher load from the top plate 11 than the portion connected to the opening portion 15. Become. For this reason, the space | interval of the 1st side wall main reinforcement part 102a and the space | interval of the 2nd side wall main reinforcement part 102c are narrower than the space | interval of the side wall main reinforcements 101.

  Further, on each of the first side wall 13 and the second side wall 14, eight side wall reinforcing bars 103 are arranged in parallel with the longitudinal direction of the side groove block 1.

  Of the first side wall 13 and the second side wall 14, the load on the top plate 11 is higher in the vertically upper portion than in the vertically lower portion. For this reason, the space | interval (100 mm in the example shown in FIG.2 (c)) between the side wall supplementary muscles 103 arrange | positioned by the vertically upper part of the 1st side wall 13 and the 2nd side wall 14 is a vertically downward part. It is narrower than the interval between the side wall supplementary bars 103 to be arranged (200 mm in the example shown in FIG. 2C).

  In each of the portions of the first side wall 13 and the second side wall 14 that are connected to the opening portion 15, the three side wall main bars 101 and the eight side wall auxiliary bars 103 are coupled in a lattice shape so as to be substantially orthogonal to each other. Has been. Further, in each of the portions of the first side wall 13 connected to the first culvert portion 16 and the second culvert portion 17, the first side wall main muscle portions 102a of the five integrated main bars 101 and the eight side wall auxiliary bars. 103 are coupled in a lattice form so as to be substantially orthogonal to each other. Further, in each of the portions of the second side wall 14 that are connected to the first undercover portion 16 and the second undercover portion 17, the second side main muscle portions 102c of the five integrated main bars 101 and the eight side wall auxiliary bars. 103 are coupled in a lattice form so as to be substantially orthogonal to each other.

  As shown in FIG. 2 (c), each of the first culvert portion 16 and the second culvert portion 17 has the culvert main muscle portion 102b substantially parallel to the lateral direction of the side groove block 1 and at substantially equal intervals (see FIG. In the example shown in 2 (c), five bars are arranged at 105 mm). Further, in each of the first culvert part 16 and the second culvert part 17, three culvert auxiliary muscles 106 are arranged in parallel at approximately equal intervals in the longitudinal direction of the side groove block 1.

  In each of the first culvert portion 16 and the second culvert portion 17, the culvert main muscle portions 102b of the five integrated main muscles 101 and the three culvert auxiliary muscles 106 are joined in a lattice shape so as to be substantially orthogonal to each other. ing. The lattice-like reinforcing bars formed by the undercut main bars 102b of the five integrated main bars 101 and the three undercover auxiliary bars 106 are located near the vertical center of the first undercarriage part 16 and the second undercarriage part 17. Each has a single bar arrangement.

  As described above, each of the ten integrated main muscles 102 is connected to the eight side wall auxiliary muscles 103 at the first side wall main muscle portion 102a, and is connected to the six undercarriage auxiliary muscles 106 at the underside main muscle portion 102b. Two side wall main reinforcing bars 102 c are connected to eight side wall auxiliary bars 103. Also, each of the ten side main muscles 102 and the side wall auxiliary muscles 103 coupled by the first side wall main muscle portion 102a and the eight side wall auxiliary muscles 103 coupled by the second side wall main muscle portion 102c. Three side wall main bars 101 are connected to each other.

  That is, in the side groove block 1, six side wall principal bars 101, ten integral main bars 102, sixteen side wall major bars 103, and six culvert minor muscles 106 are integrally connected and embedded.

  Next, the manufacturing method of the side groove block provided with said structure is demonstrated with reference to drawings.

  In the manufacture of the side groove block 1, first, the six side wall main bars 101, the ten straight main bars 102, the sixteen side wall main bars 103, and the six undercarriage auxiliary bars 106 are combined. The planar rebar 100 in which these rebars are integrated is formed.

  FIG. 3 is a plan view showing a configuration example of an integrated reinforcing bar.

  As shown in FIG. 3, the integrated reinforcing bar 100 includes a first side wall reinforcing part 110 embedded in the first side wall 13, a second side wall reinforcing part 120 embedded in the second side wall 14, and a first side reinforcing bar part 120. The first undercover portion 130 embedded in the undercover portion 16 and the second undercover portion 140 embedded in the second undercover portion 17 are included.

  In the integrated reinforcing bar 100, as shown in FIG. 3, five linear integrated main reinforcing bars 102 extend across the first side wall reinforcing bar part 110, the first undercut reinforcing bar part 130, and the second side wall reinforcing bar part 120. The bars are arranged substantially parallel to each other and at substantially equal intervals. Further, in the integrated reinforcing bar 100, the five linear integrated main reinforcing bars 102 are substantially parallel to and substantially parallel to each other across the first side wall reinforcing bar part 110, the second undercut reinforcing bar part 140, and the second side wall reinforcing bar part 120. The bars are arranged at equal intervals.

  Furthermore, three side wall main bars 101 are arranged in parallel with each other at approximately equal intervals in each of the first side wall reinforcing bar part 110 and the second side wall reinforcing bar part 120. Further, eight side wall reinforcing bars 103 are arranged in each of the first side wall reinforcing bar portion 110 and the second side wall reinforcing bar portion 120 so as to be substantially parallel to each other.

  In addition, in each of the first undercarriage reinforcing bar part 130 and the second undercarriage reinforcing bar part 140, three undercarriage auxiliary reinforcing bars 106 are arranged substantially parallel to each other and at substantially equal intervals.

  In each of the first side wall reinforcing bar portion 110 and the second side wall reinforcing bar portion 120, the three side wall main reinforcing bars 101 and the eight side wall auxiliary reinforcing bars 103 are coupled so as to be substantially orthogonal to each other, and ten straight lines are provided. The integrated main reinforcing bar 102 and the eight side wall auxiliary reinforcing bars 103 are coupled so as to be substantially orthogonal to each other. Further, in each of the first undercover reinforcing bar portion 130 and the second undercover reinforcing bar portion 140, the ten straight integrated main reinforcing bars 102 and the three undercover reinforcing bars 106 are coupled so as to be substantially orthogonal to each other. .

  Next, the 10 linear integrated main bars 102 are bent at substantially right angles at the positions of the two valley fold lines shown in FIG. 3 to process the planar integrated rebar 100 into a substantially U-shape.

  The monolithic reinforcing bar 100 bent into a substantially U-shape is placed in the mold of the side groove block 1 and concrete is poured into the side groove block 1, whereby the side groove block 1 is manufactured.

  As described above, according to the side wall block 1 according to this embodiment, the amount of reinforcing bars can be reduced without reducing the strength.

  Specifically, the side wall block 1 forms a planar integrated rebar 100 in which these reinforcing bars are integrated, without separately processing the reinforcing bars embedded in the two side walls and the two underdrains. Since it suffices to bend at a right angle, the rebar processing process can be greatly reduced. Further, the first side wall 13 and the second side wall can be obtained by embedding the integrated rebar 100 bent at a substantially right angle without assembling a plurality of rebars embedded in each of the two side walls and the two underdrains. The vertical accuracy of 14 can be easily ensured.

  Furthermore, in the integrated main reinforcing bar 102, the undercut main bar and the two side wall main reinforcing bars are integrated, so that a human error such that a reinforcing bar having a different size from the desired size is mistakenly arranged in the mold of the side groove block 1. Can be prevented.

  Further, the undercut main bar and the two main side bars are integrated with each other so as to extend over the first side wall 13 and the first underdrain part 16 or the second underside part 17 and the second side wall 14. By arranging the bar-shaped integral main reinforcing bars 102, the side wall block 1 according to the present embodiment has a smaller amount of reinforcing bars than the conventional side wall block 3, and realizes higher strength than the conventional side wall block 3. Can do.

  Furthermore, the space | interval of the 1st side wall main reinforcement part 102a arrange | positioned to the part connected with the 1st underdrain part 16 or the 2nd undercarriage part 17 with the high load from the top plate 11 among the 1st side walls 13, In addition, in the second side wall 14, the interval between the second side wall main reinforcing bars 102c arranged in the portion connected to the first underdrain part 16 or the second underside part 17 having a high load from the top plate 11, It is narrower than the interval between the side wall main bars 101 arranged in the portion connected to the opening portion 15 where the load from the top plate 11 is low. In addition, among the first side wall 13 and the second side wall 14, the interval between the side wall side reinforcing bars 103 arranged in the vertically upper portion where the load from the top plate 11 is high is the lower vertical direction where the load from the top plate 11 is low. This is narrower than the interval between the side wall supplementary bars 103 arranged in this portion. As described above, the amount of reinforcing bars arranged in a portion with a high load from the top plate 11 is increased, and the amount of reinforcing bars arranged in a portion with a low load from the top plate 11 is reduced, thereby reducing the strength. Since the amount of reinforcing bars can be minimized, the manufacturing cost of the side groove block 1 can be reduced.

  Furthermore, the lattice-shaped reinforcing bars formed by the undercut main bar portions 102b of the five integrated main bars 102 made of the deformed steel bar D10 and the three undercover bars 106 made of the deformed steel bar D6 are A single bar arrangement is provided in the vicinity of the center in the vertical direction of the first undercover portion 16 and the second undercover portion 17. In this way, by arranging the grid-like reinforcing bars formed from high-strength reinforcing bars at appropriate positions near the center in the vertical direction of the first culvert part 16 and the second culvert part 17, Even a single bar arrangement can have sufficient strength to cope with both the bending stress generated on the outside of the first culvert portion 16 and the second culvert portion 17 and the bending stress generated on the inside. And by setting it as single reinforcement, while the workability | operativity of rebar assembly can be improved, the manufacturing cost of the block 1 for side grooves can be reduced.

  Further, according to the side groove block 1, the amount of reinforcing bars can be reduced without lowering the strength, so that it is possible to reduce the rate of occurrence of defective products due to poor filling of concrete or occurrence of beans boards (junkers).

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation and application are possible. Hereinafter, modifications of the above-described embodiment applicable to the present invention will be described.

  In the above embodiment, the side groove block 1 has been described as having a length of 2000 mm in the longitudinal direction, a width of 500 mm in the lateral direction, and a height of 1245 mm in the vertical direction. However, the present invention is not limited to this, and the length in the longitudinal direction, the width in the lateral direction, and the height in the vertical direction of the side groove block 1 can be arbitrarily changed. For example, the vertical height of the side groove block 1 can be changed within a range of 445 mm to 1645 mm in increments of 100 mm, for example. When the height in the vertical direction of the side groove block 1 is increased, the load on the first side wall 13 and the second side wall 14 increases, so the amount of reinforcing bars of the side wall main reinforcement 101 and the integral main reinforcement 102 is increased. Alternatively, the side wall main bars 101 and the integrated main bars 102 may be changed to thick reinforcing bars. On the other hand, when the height of the side groove block 1 in the vertical direction is lowered, the load on the first side wall 13 and the second side wall 14 is reduced. The amount of reinforcing bars may be reduced, or the side wall main bars 101 and the integrated main bars 102 may be changed to thin reinforcing bars.

  In this way, if only the first side wall 13 and the second side wall 14 are changed by changing the amount of reinforcing bar of the integrated main reinforcing bar 102 or the thickness of the integrated main reinforcing bar 102 according to the vertical height of the side groove block 1. In addition, since the amount of reinforcing bars arranged in the first culvert portion 16 and the second culvert portion 17 can also be made appropriate, the rate of defective products due to the occurrence of defective filling of concrete and beans (junker) is reduced. can do.

  In addition, when the side groove block 1 is very large, such as when the height of the side groove block 1 is very high, the thickness of the integral main reinforcement 102 necessary for structural calculation becomes too thick or necessary. In some cases, the amount of the reinforcing bars of the integrated main reinforcing bar 102 may be excessive, and in reality, there is a possibility that the integrated main reinforcing bar 102 alone cannot cope. Therefore, as shown in FIG. 4, the side groove block 1 may be provided with a haunch muscle 400 in a bent portion of the integrated main reinforcing rod 102 and fix the bent portion of the integrated main reinforcing rod 102 as necessary. The haunch bar 400 effectively functions as a reinforcing member for the corner portion of the side groove block 1 in terms of structural mechanics. Therefore, the side groove block 1 can reduce the amount of reinforcing bars of the integral main bar 102 that is excessive in structural calculation. . In addition, the haunch bar 400 also functions as a reinforcing material for the bent portion of the integrated main reinforcing bar 102 and can contribute to ensuring the accuracy of the reinforcing bar. Therefore, the integrated main reinforcing bar 102 bent into a substantially U-shape is formed. It can be prevented from spreading or conversely narrowing.

DESCRIPTION OF SYMBOLS 1 Side groove block 11 Top plate 12 Opening 13 1st side wall 14 2nd side wall 15 Opening part 16 1st closing part 17 2nd closing part 100 Integrated rebar 101 Side wall main reinforcement 102 Integrated main reinforcement 102a 1st side wall Main reinforcing bar portion 102b Undercut main reinforcing bar portion 102c Second side wall main reinforcing bar portion 103 Side wall auxiliary muscle 106 Undercarriage auxiliary muscle 110 First side wall reinforcing bar portion 120 Second side wall reinforcing bar portion 130 First undercutting reinforcing bar portion 140 Second undercutting reinforcing bar portion 400 Hunched muscle

Claims (5)

First and second side walls facing each other, and a top plate having one end connected to one end of the first side wall at a substantially right angle and the other end connected to one end of the second side wall at a substantially right angle. A concrete structure,
A first reinforcing bar that is bent in a substantially U-shape is arranged over the first side wall, the top plate, and the second side wall,
A concrete structure characterized by that. The top plate includes an opening portion provided with an opening, and a culvert portion,
A plurality of the first reinforcing bars are arranged over the first side wall, the culvert portion, and the second side wall,
A plurality of second reinforcing bars are arranged substantially in parallel with the first reinforcing bars in the portions of the first and second side walls that are connected to the opening portions.
The interval between the first reinforcing bars is narrower than the interval between the second reinforcing bars,
The concrete structure according to claim 1. A plurality of third reinforcing bars are arranged on each of the first and second side walls so as to be substantially orthogonal to the first reinforcing bars,
The interval between the third reinforcing bars arranged near the connecting portion with the top plate is narrower than the interval between the third reinforcing bars arranged away from the connecting portion.
The concrete structure according to claim 1 or 2, characterized in that In the underdrain, a plurality of fourth reinforcing bars are arranged so as to be substantially orthogonal to the plurality of first reinforcing bars,
The lattice-shaped reinforcing bars formed by the plurality of first reinforcing bars and the plurality of fourth reinforcing bars are singlely arranged in the underdrain,
The concrete structure according to claim 1, 2, or 3. First and second side walls facing each other, and a top plate having one end connected to one end of the first side wall at a substantially right angle and the other end connected to one end of the second side wall at a substantially right angle. A method for producing a concrete structure,
Combined reinforcing bars arranged in the concrete structure to form an integrated planar reinforcing bar,
Bending the flat reinforcing bar into a substantially U shape,
The substantially U-shaped reinforcing bars are arranged in a formwork of the concrete structure, and the concrete structure is manufactured by pouring concrete into the formwork.
A method for producing a concrete structure characterized by the above.

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