JP2006283434A - Concrete block product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate inconvenience of the need to use an anchor plate of increasing processing cost, due to requiring a through-hole for passing grout through the anchor plate, when trying to fill the grout in an insertion hole for inserting a PC steel bar by connecting a concrete block product, for example, by the PC steel bar, in the concrete block product. <P>SOLUTION: This concrete block product has the insertion hole arranged in a wall and arranging a tension material, and a recessed part arranged so as to open on an outside surface and communicating with the insertion hole. The concrete block product is provided with a communicating means for communicating the inside of the insertion hole with the inside of the recessed part when the tension material arranged in the insertion hole is anchored at its end part in the recessed part via the anchor plate. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a concrete block product such as a box culvert.

  Conventionally, when connecting multiple box culverts, which are concrete block products, or when assembling multiple blocks that become box culverts by combining them, a tension material is used in the box culvert haunch or through hole provided in the side wall of the block. A PC steel rod is inserted, both ends of the PC steel rod are fixed with nuts through fixing plates, and grout is filled in the insertion hole to prevent corrosion and displacement of the PC steel rod.

When filling such a grout, the grout passes through the fixing plate (supporting plate), for example, as described in Patent Document 1 so that the grout spreads sufficiently in the insertion hole and the fixing portion of the PC steel rod. A through hole or grout hole is provided.
Japanese Patent Laid-Open No. 11-336255

  However, with such a structure, when manufacturing a fixing plate, the sheet metal is cut to a predetermined size, and a through-hole through which the PC steel bar passes is formed in the substantially central portion, and then the penetration is made. It is necessary to drill a grout hole that communicates the hole and the surface with which the nut contacts. This grout hole needs to communicate with the inside of the insertion hole and the space in which the nut is placed when the PC steel rod is fixed, so it needs to open to the outside of the contacting nut. For this reason, the grout hole is drilled obliquely from the surface in contact with the nut toward the through hole, so that the processing required skill.

  Further, since the fixing plate is pressed by the nut, it needs to have enough strength to withstand the pressure. However, when the grouting hole is provided, a cavity portion is generated in the fixing plate by the grouting hole, so that the strength is lowered as compared with the case where the grouting hole is not provided. For this reason, the thickness of the fixing plate is increased so as to compensate for the strength reduction, but the material cost increases by increasing the thickness, which is not economical.

  Therefore, in view of the above problems, the present invention has an object to provide a concrete block product that can fill grout into an insertion hole in which a tension material is disposed even if processing of a fixing plate is minimized. It is what.

  That is, the concrete block product of the present invention is a concrete block product including an insertion hole provided in the wall and in which a tension material is disposed, and a recess provided to be opened on the outer surface and communicating with the insertion hole. A communication means is provided for communicating the inside of the insertion hole and the inside of the recess when the tension member arranged in the insertion hole is fixed through the fixing plate at the end thereof.

  If it is such a structure, after arrange | positioning a tension material in an insertion hole and fixing the tension material in a recessed part, the inside of an insertion hole and the inside of a recessed part will be in a communication state by a communication means. That is, in this case, even if the above-described grout hole is not provided in the fixing plate, the communicating means communicates the inside of the insertion hole and the inside of the recess. Therefore, when a filler such as grout is injected into the insertion hole, the filler overflows from the insertion hole into the recess through the communication means, so that the insertion hole and the recess can be filled with the filler. Become. In this case, it is not necessary to provide a grout hole in the fixing plate, so that the work required for processing the fixing plate can be reduced. Further, since there is no configuration for reducing the strength of the fixing plate, it is not necessary to increase the thickness of the fixing plate, and it becomes possible to improve the economy. In addition, the fixing plate having the same shape can be used regardless of the injection of the filler, and the number of parts when connecting concrete block products can be reduced.

  Specifically, the recess has a bottom surface that supports the fixing plate when the tension material is fixed, and a side wall surface that is provided so as to form a space that is continuous with the bottom surface to accommodate the end portion of the tension material. And the communication means includes a bottom surface recessed portion and a side wall surface recessed portion which are provided on the bottom surface and the side wall surface and communicate with each other. The shape of the concave portion is not particularly limited, and various types such as a semi-conical trapezoidal shape, a half-pyramidal trapezoidal shape, a rectangular parallelepiped shape, and a cubic shape are exemplified. The bottom surface preferably has approximately the same area as the fixing plate.

  The bottom recess and the side wall recess may have any shape that does not hinder the flow of the filler. In this case, it is preferable that the side wall surface recessed portion has a length in the axial direction of the tendon that exceeds the thickness of the fixing plate. By setting the length in this way, the filler injected into the insertion hole can surely overflow into the recess. Specifically, it is desirable that the bottom surface recessed portion and the side wall surface recessed portion are grooves.

  In the present invention, as described above, the tension member is disposed in the insertion hole, and after fixing the tension member in the recess, the insertion hole and the recess are communicated by the communication means. Even if the grout hole described above is not provided, the communication means can communicate the inside of the insertion hole with the inside of the recess, and when a filler such as grout is injected into the insertion hole, the filler communicates from the inside of the insertion hole. It overflows into the recess through the means, and the inside of the insertion hole and the recess can be filled with the filler.

  Therefore, it is not necessary to provide a grout hole in the fixing plate, so that the work required for processing the fixing plate can be reduced. Further, since there is no configuration for reducing the strength of the fixing plate, it is not necessary to increase the thickness of the fixing plate, and the economic efficiency can be improved. In addition, the fixing plate having the same shape can be used regardless of the filling material injection, and the number of parts when connecting concrete block products can be reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 6.

  The concrete block product 100 of this embodiment is of a combination type, and can be constructed, for example, for sewers by laying continuously in the vertical direction. The concrete block product 100 includes a lower block 1 and an upper block 2 combined on the lower block 1. In this embodiment, the lower block 1 and the upper block 2 have the same shape, and the lower end surfaces 21a, 22a of the left and right side walls 21, 22 of the upper block 2 are connected to the corresponding left and right side walls 11, When the 12 upper end surfaces 11a and 12a are overlapped and connected to each other, the concrete block product 100 is formed which forms a space opened in the front-rear direction (depth direction) and closed in the up-down direction. In addition, although not shown in figure, the lower block 1 and the upper block 2 have the reinforcement arrangement | positioning by a deformed round steel (steel bar for reinforced concrete) in the inside.

  The lower block 1 includes a bottom plate 13, left and right side walls 11, 12 extending upward from both side edges of the bottom plate 13, a lower connecting recess 14 that opens to upper end surfaces 11 a, 12 a of the left and right side walls 11, 12, and a lower end An unbonded PC steel rod 15 fixed in the bottom plate 13 and penetrating through the side walls 11 and 12 and having an upper end positioned in the lower connecting recess 14, and an inner wall of the lower connecting recess 14 opening to the inner surfaces of the left and right side walls 11 and 12. And a grout injection hole 16 which is open to the center. The lower end of the unbonded PC steel rod 15 is fixed by a nut 18 via a fixing plate 17. Further, the upper end of the unbonded PC steel bar 15 is connected to a PC steel bar 4 described later via the coupler 3. In addition to this, the lower block 1 is a front joint which is the outer surface of the concrete block product 100 at a substantially intermediate position in the height direction of the hunch 13a where the bottom plate 13 and the side walls 11 and 12 intersect and the side walls 11 and 12, respectively. A vertical tightening insertion hole 61 through which the PC steel rod 5 as a tension material is disposed penetrating from the surface 19a to the rear bonding surface 19b, and communicates with the vertical tightening insertion hole 61 to open to the front bonding surface 19a and the rear bonding surface 19b. A front recess 62 and a rear recess 63 are provided, and a front recess grout injection hole 64 that communicates with the front recess 62 and opens to the inner surfaces of the side walls 11 and 12 is provided.

  The front concave portion 62 and the rear concave portion 63 have a truncated cone shape that expands outward, and a bottom surface that supports the fixing plate 65 when the PC steel rod 5 disposed in the vertical tightening insertion hole 61 is fixed. 62a and a side wall surface 62b provided so as to form a space sufficient to accommodate the end of the PC steel bar 5 continuously from the bottom surface 62a, and provided on the bottom surface 62a and the side wall surface 62b, respectively. A bottom groove 62c that is a bottom recess and a side wall groove 62d that is a sidewall recess are communicated with each other. The bottom surface groove 62c and the side wall groove 62d are formed in a continuous state, and when the PC steel rod 5 disposed in the vertical tightening insertion hole 61 is fixed through the fixing plate 65 at the end, A communication means for communicating the inside of the tightening insertion hole 61 and the inside of the recesses 62 and 63 is configured. The side wall groove 62d of the front recess 62 is formed such that the length in the axial direction of the PC steel bar 5 exceeds the thickness of the fixing plate 65 when the PC steel bar 5 is fixed. Then, it is formed in a length reaching the front joint surface 19a. The same applies to the side wall groove 62d of the rear recess 63, and is formed to have a length reaching the rear joint surface 19b. The cross-sectional shape of the bottom surface groove 62c and the side wall groove 62d is preferably, for example, a semicircle, and may be a square, a rectangle, a polygon, a quadric surface, or the like.

  In this embodiment, the bottom groove 62c and the side wall groove 62d are provided one by one, but a plurality of them may be provided within a range in which the strength of the front recess 62 and the rear recess 63 is not reduced. When a plurality of bottom surface grooves 62c and side wall grooves 62d are provided, for example, two are arranged opposite to each other, and if there are three or more, the bottom surface grooves 62c are arranged radially around the central axis of the vertical fastening insertion hole 61. To do. As described above, when the plurality of bottom surface grooves 62c and the side wall grooves 62d are used, the time required for injecting the grout G, which is a filling material flowing out from the vertical tightening insertion hole 61 into the front recess 62 and the rear recess 63, is shortened. Is possible.

  The fixing plate 65 is made of a circular sheet metal having a thickness capable of maintaining a strength capable of withstanding the pressure applied by the PC steel bar 5 when so-called vertical fastening is performed by the PC steel bar 5, and the bottom surface of each of the recesses 62 and 63. The through hole which has almost the same size (diameter) as 62a and through which the PC steel rod 5 can penetrate in a substantially non-contact state is provided at the approximate center thereof. The fixing plate 65 is not provided with any through holes other than the through holes, and is commonly used for fixing the lower end of the unbonded PC steel bar 15 and the PC steel bar 5. That is, the fixing plate 65 is of the same type as the fixing plate 17 described above. And by making it the same as the magnitude | size of the bottom face 62a, while being able to function the fixing plate 65 also as a positioning member of PC steel bar 5, since the internal volume of each recessed part 62 and 63 becomes small, Grout G mentioned later The amount of use can be reduced.

  On the other hand, the upper block 2 includes a top plate 23, left and right side walls 21 and 22 that extend downward from both side edges of the top plate 23, and an upper connecting recess 24 that opens at the lower end surfaces of the left and right side walls 21 and 22. And an upper fixing recess 25 that opens on the top surface of the top plate 23 that is the outer surface, and a PC steel rod 4 that is connected to the unbonded PC steel rod 15 via the coupler 3, and the upper connecting recess 24 and the upper fixing recess 25 are An upper and lower tightening insertion hole 26 is provided.

  In addition, the upper block 2 has a hunch 23a where the top plate 23 and the side walls 21 and 22 cross each other, and a substantially intermediate position in the height direction of the respective side walls 21 and 22 from the front joint surface 29a which is the outer surface. A vertical fastening insertion hole 71 through which the PC steel bar 5 is disposed penetrating up to the joining surface 29b, and a front recess 72 that opens to the front joining surface 29a and the rear joining surface 29b and communicates with each other by the longitudinal fastening insertion hole 71. And a rear recess 73 and a front recess grout injection hole 74 communicating with the front recess 72 and opening in the inner surfaces of the side walls 21 and 22. The configurations of the upper fixing recess 25, the front recess 72 and the rear recess 73 are the same as the configurations of the front recess 62 and the rear recess 63 of the lower block 1. That is, each of the recesses 25, 72, 73 has a bottom surface 25a, 72a, 73a that supports the fixing plate 65 when the PC steel rods 4, 5 are fixed, and the PC steel rod 4 continuous to the bottom surfaces 25a, 72a, 73a. , 5 are provided on the bottom surface 25a, 72a, 73a and the side wall surfaces 25b, 72b, 73b, respectively. And bottom wall grooves 25c, 72c, 73c which are bottom recesses communicating with each other, and side wall grooves 25d, 72d, 73d which are sidewall recesses. The lengths of the side wall grooves 25d, 72d, 73d of the recesses 25, 72, 73 are formed by the same design concept as the length of the side wall groove 62d described above.

  Further, in this embodiment, an unbonded PC steel bar is embedded across the bottom plate 13 and the top plate 23 so that prestress can be introduced into the bottom plate 13 and the top plate 23. The two ends are pulled and fixed at both ends to introduce a predetermined amount of prestress.

  In such a configuration, the lower block 1 is placed on the foundation at the construction site, and the lower end of the PC steel rod 4 inserted into the upper and lower tightening insertion holes 26 before placing the upper block 2 thereon is connected to the coupler 3. To connect to the unbonded PC steel bar 15 of the lower block 1. Thereafter, the side walls 21 and 22 of the upper block 2 and the side walls 11 and 12 of the lower block 1 are aligned in the thickness direction, and the upper block 2 is placed on the lower block 1. Next, the upper end of the PC steel bar 4 connected to the unbonded PC steel bar 15 is fixed in the upper fixing recess 25. For fixing, the PC steel rod 4 is passed through a through hole provided in the substantially center of the fixing plate 75, and then a nut N is temporarily fixed to the PC steel rod 4, and in this state, the PC steel rod 4 is moved with a predetermined traction force. This is performed by tightening the nut N in the towing state.

  After assembling the concrete block product 100 formed in a box shape that opens and closes in this way, the PC steel rod 5 is inserted into the vertical fastening insertion holes 61 and 71 of the lower block 1 and the upper block 2, respectively, and the fixing plate The front end portion is fixed with a nut N through 65 and 75. Next, the PC steel bar 5 is passed through the fixing plates 65 and 75 at the rear end of the PC steel bar 5, the nut N is temporarily fixed to the PC steel bar 5, and the PC steel bar 5 is attached with a predetermined traction force different from the above. In the state of being pulled, the nut N is tightened and fixed.

  The concrete block product 100 to be connected is placed in the vicinity of the concrete block product 100 and assembled in the same manner. In this case, the longitudinal axis of the concrete block product 100 assembled earlier and the axis of the concrete block product 100 assembled later are substantially matched. After assembling the concrete block product 100 to be connected, the PC steel rod 5 is inserted into the vertical fastening insertion holes 61 and 71 of the concrete block product 100 to be connected, and the vertical fastening insertion holes 61 of the concrete block product 100 assembled earlier. , 71 is connected to a PC steel bar 5 by a coupler CPL. Then, the joint rubber JG is interposed between the rear joint surface 19b of the concrete block product 100 assembled earlier and the front joint surface 19a of the concrete block product 100 assembled later, and the both concrete block products 100 are abutted.

  Thereafter, the same traction force as that applied to the PC steel rod 5 of the concrete block product 100 assembled earlier is the PC steel rod 5 arranged in the vertical fastening insertion holes 61 and 71 of the concrete block product 100 assembled later. In the state of being pulled, the fixing is performed by the nut N through the fixing plate 65. As a result, almost the same compressive force is applied to each concrete block product 100 by the PC steel bar 5 of the concrete block product 100 assembled earlier and the PC steel bar 5 of the concrete block product 100 assembled later.

  As described above, the concrete block product 100 is assembled from the lower block 1 and the upper block 2, and the PC steel rod 5 is inserted into the vertical fastening insertion holes 61 and 71 of the assembled concrete block product 100, and the PC steel. The operation of connecting and pulling the bar 5 to the PC steel bar 5 that has already been fixed to the concrete block product 100 that has already been installed is repeated, and the concrete block product 100 is repeatedly connected to construct the entire underdrain. . After that, the grout G is filled into the upper and lower tightening insertion holes 26, the vertical tightening insertion holes 61 and 71, and the recesses 62, 72, 73, 73, and 25.

  Below, filling of grout G is demonstrated.

  As shown in FIG. 5, the grout G is injected from the grout injection hole 16 of the lower connection recess 14 and the grout injection hole 64 of the front recess 62. A hose for injecting grout is inserted into the grout injection hole 16 of the lower connecting recess 14 and the grout G is injected under pressure to the lower connecting recess 14. The injected grout G fills the space formed by the lower connecting concave portion 14 and the upper connecting concave portion 24 and then flows into the upper and lower tightening insertion holes 26 communicated with the upper connecting concave portion 24 as indicated by arrows in FIG. To do. The PC steel rod 4 is disposed in the vertical fastening insertion hole 26, but the grout G flows into the space around the PC steel rod 4 and reaches the upper fixing recess 25.

  The grout G that has reached the upper fixing recess 25 flows into the bottom groove 25 c that communicates with the vertical fastening insertion hole 26. The bottom groove 25c is covered with the fixing plate 75 because the PC steel rod 4 is fixed. Accordingly, the grout G flowing into the bottom groove 25c is led out to the side wall groove 25d communicating with the bottom groove 25c. Since the side wall groove 25d has a length that reaches the top surface of the top plate 23, the grout G that has flowed into the side wall groove 25d is guided by the side wall groove 25d and reaches the upper side of the thickness of the fixing plate 75, so Will diffuse. Thus, the bottom groove 25c and the side wall groove 25d in the upper fixing recess 25 function as an air vent hole in the upper and lower tightening insertion hole 26 when the grout G flows in the upper and lower tightening insertion hole 26, and the upper and lower tightening insertion hole 26. It functions as a discharge hole for grout G.

  Similarly, the filling of the grout G into the vertical tightening insertion holes 61 and 71 is performed, for example, by injecting a front recess grout that communicates with the front recesses 62 and 72 of the concrete block product 100 disposed in the middle of the underdrain as shown in FIG. The grout injection hose HP is inserted into the hole 64 only. That is, the hose HP is not connected to the front recess grout injection hole 64 communicating with the other front recesses 62 and 72, and functions as an air vent hole when the grout G enters the vertical tightening insertion holes 61 and 71. Even when the grout G is filled into the vertical tightening insertion holes 61 and 71, the grout G from the hose HP is joined as shown by an arrow in FIG. After filling the space formed by the rear concave portions 63 and 73 and the front concave portions 62 and 72 of the two concrete block products 100 thus formed, the concrete block product 100 flows into the vertical fastening insertion holes 61 and 71.

  Grout G filled in the space formed by the rear recesses 63 and 73 and the front recesses 62 and 72 flows into the bottom groove 62c from the side wall groove 62d in the rear recesses 63 and 73, and then vertically tightened through holes 61 and 71. Flow into. In this case, the PC steel rod 5 is also disposed in the vertical fastening insertion holes 61 and 71 as in the case of the vertical fastening insertion hole 26, but the grout G flows through the space around the PC steel rod 5, and then the concave portion is formed. It reaches the front recesses 62 and 72 of the concrete block product 100 having 63 and 73.

  The grout G that has reached the front recesses 62, 72 flows into the bottom groove 62c that communicates with the vertical fastening insertion holes 61, 71 of the front recesses 62, 72. The bottom groove 62c is covered with the fixing plate 65 because the PC steel rod 5 is fixed. Therefore, the grout G flowing into the bottom groove 62c is led out to the side wall groove 62d communicating with the bottom groove 62c. Since the side wall groove 62d has a length that reaches the front joint surface 19a, the grout G that has flowed into the side wall groove 62d is guided by the side wall groove 62d and reaches the upper side of the thickness of the fixing plate 65, and enters the front recesses 62 and 72. It will diffuse.

  On the other hand, the grout G that has flowed into the front recesses 62 and 72 including the grout injection hole 64 flows into the vertical tightening insertion holes 61 and 71 of the concrete block product 100 including the front recesses 62 and 72. In the front concave portions 62 and 72, the opening portions of the vertical tightening insertion holes 61 and 71 are closed only by connecting the PC steel rod 5 to the PC steel rod 5 of the concrete block product 100 positioned in front by a coupler. Therefore, the grout G flows into the vertical tightening insertion holes 61 and 71 more smoothly than the portion where the PC steel bar is fixed, and reaches the rear recesses 63 and 73 of the concrete block product 100 in the same manner.

  Thus, the upper fixing recess 25, the front recesses 62 and 72, and the rear recesses 63 and 73 to which the PC steel bar 5 is fixed by the fixing plates 75 and 65 and the nut N communicate with the bottom groove 62c and the bottom groove 62c, respectively. Since the fixing plate 75, 65 does not have a structure for allowing the grout G to pass therethrough, the upper and lower tightening insertion holes 26, the vertical tightening insertion holes 61, 71, the upper fixing recess 25, and the front recess 62 are provided. , 72 and rear recesses 63, 73 can be reliably filled with grout G. In this embodiment and the like, each of the front recesses 62 and 72 is provided with a grout injection hole 64, so that the grout G comes out from the grout injection hole 64 where the hose HP is not connected to the grout injection hole 64. The filling state of grout G can be confirmed.

  Further, as described above, the grout G is formed in each of the recesses 25, 62, 72, 63, 73 via the bottom surface groove 62c and the side surface groove 62d which are communication means provided in each of the recesses 25, 62, 72, 63, 73. Since it enters, it is possible to use the fixing plates 65 and 75 that can reduce the man-hours for processing and thus reduce the manufacturing unit cost, and as a result, the construction cost of the underdrain can be reduced. In addition to this, the fixing plates 65 and 75 do not have a structure for reducing the strength like the conventional grout injection holes, so that it is not necessary to increase the thickness of the fixing plates 65 and 75, and the fixing holes 65 and 75 are provided. Since no space is required, there is no need to increase the area, and the economy can be improved. Furthermore, regardless of the injection of grout G, the fixing plates 65 and 75 can be of the same shape, that is, the single fixing plates 65 and 75 can be used for building a culvert, and parts can be standardized. .

  Further, the bottom groove 62c and the side wall groove 62d can be formed by making a slight modification to the existing concrete block product manufacturing formwork, and the existing concrete block product manufacturing formwork can be modified without wasting it. Cost can be minimized and utilized effectively.

  The present invention is not limited to the above embodiment.

  In the above-described embodiment, the concrete block product 100 of the upper and lower combination type composed of the upper block 2 and the lower block 1 has been described, but it may not be such an assembly type. That is, any concrete block product can be used as long as it constitutes a box culvert or manhole, etc., and can construct a culvert or the like by connecting a plurality of pieces using a tension material such as a PC steel bar. Further, for example, in the case of a cross-sectional mouth shape and a box culvert, the insertion hole into which the PC steel rod is inserted may be provided at least in the hunch part. An insertion hole may be provided in the side wall as appropriate.

  In the above-described embodiment, the bottom concave portion and the side wall concave portion constituting the communication means are described as grooves. However, these concave portions are, for example, ¼ spherical shape that does not hinder the flow of the filler. Thing, a quadric surface, etc. may be sufficient. With such a configuration, the flow passage cross-sectional area of the filler can be increased, so that the filling efficiency of the filler can be increased.

  In the above embodiment, the fixing plate 65 has the same size (diameter) as the bottom surface 62a. However, the fixing plate 65 is formed to be slightly smaller than the bottom surface 62a. The bottom groove 62c may be exposed to the side of the fixing plate 65 in a state where the fixing plate 65 is in contact with the bottom surface 62a. In this case, since the bottom surface groove 62c is exposed to the side of the fixing plate 65, the grout G injected from the exposed portion flows into the concave portion, so that the side wall groove is unnecessary. Even in such a configuration, a plurality of bottom surface grooves 62c may be provided.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The perspective view of the embodiment of the present invention. Sectional drawing which shows the up-and-down fastening insertion hole of the embodiment. Sectional drawing which shows the vertical fastening insertion hole of the embodiment. The principal part expansion front view and sectional drawing of the embodiment. FIG. 2 is a view corresponding to FIG. FIG. 3 is a view corresponding to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lower block 2 ... Upper block 5 ... PC steel rod 17, 65 ... Fixing plate 19a ... Front joining surface 19b ... Rear joining surface 25 ... Upper fixing recessed part 61 ... Vertical fastening insertion hole 62 ... Front recessed part 62a ... Bottom 62b ... side Wall surface 62c ... Bottom groove 62d ... Side wall groove 63 ... Rear recess

Claims (4)

In a concrete block product provided with an insertion hole provided in a wall and in which a tendon is disposed, and a recess provided to be opened on the outer surface and communicating with the insertion hole,
A concrete block product provided with communication means for communicating the inside of the insertion hole and the inside of the recess when the tension material disposed in the insertion hole is fixed to the recess through the fixing plate at the end thereof. The recess has a bottom surface that supports the fixing plate when the tension material is fixed, and a side wall surface that is provided to form a space continuous with the bottom surface to accommodate the end portion of the tension material. 2. The concrete block product according to claim 1, wherein the means comprises a bottom surface recessed portion and a side wall surface recessed portion which are respectively provided on the bottom surface and the side wall surface and communicate with each other. The concrete block product according to claim 2, wherein the side wall surface recessed portion has a length in the axial direction of the tendon material exceeding a thickness of the fixing plate. The concrete block product according to claim 3, wherein the bottom recess and the side wall recess are grooves.

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