JP2006233513A - Vertically combining concrete block product and connecting structure of vertically combining concrete block product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertically combining concrete block product for surely preventing the dislocation of an upper block and a lower block without forming a wire rod in a thick diameter, by stopping the movement in a cylindrical body by a filler of filling the wire rod in the cylindrical body, when connecting the upper block and the lower block by a connecting means. <P>SOLUTION: This structure positions and fixes a PC steel bar 35 in a cylinder 36 by filling grout 39 in the cylinder 36, by putting the cylinder 36 on its PC steel bar 35 in a boundary part between the lower block 1 and the upper block 2, and by connecting the lower block 1 and the upper block 2 by the PC steel bar 35. The cylinder 36 is fixed by hardening the grout 39 filled in a space formed of a lower recessed part 38 and an upper recessed part 37. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an up-and-down combination concrete block product used for sewers, conduits, drainage channels, road widening culverts, underground pedestrian crossings, bridge culverts, garages, water storage tanks, common grooves, and the like.

Conventionally, as this kind of up-and-down combination concrete block product, for example, what was described in patent documents 1 is known. In this Patent Document 1, a substantially U-shaped lower half member formed by connecting lower side plates to both side edges of a bottom plate, and upper side plates that face the lower side plates are connected to both side edges of the top plate. The upper half plate is covered with a steel pipe at a position corresponding to the abutting portion between the upper side plate and the lower side plate of the wire constituting the connection means. This prevents the side plate from slipping laterally.
Japanese Examined Patent Publication No. 62-54937 (FIGS. 8 and 9)

  In such a connection structure of concrete block products, a wire rod that connects the lower half member and the upper half member, for example, a PC steel material is made of a large diameter, and a large tension is applied to the upper side plate and A sufficient pressure contact force acts at the abutting portion with the lower side plate. The lateral displacement between the lower half member and the upper half member is suppressed by the pressing force acting on the abutting portion. For this reason, in order to reliably suppress the lateral displacement, it is necessary to say that the wire has a larger diameter or that the tension force is increased accordingly, which is uneconomical.

  In addition, as described above, the portion of the wire corresponding to the abutting portion is covered with a steel pipe, but since there is a gap between the steel pipe and the wire, the lower half member and the upper half member When an external force is applied to the abutting portion between the upper side plate and the lower side plate in a state where the upper half member and the lower half member are connected, the upper half member may be displaced from the lower half member.

  The object of the present invention is to eliminate such problems.

  That is, the upper and lower combined concrete block product of the present invention has a lower block having left and right side walls extending upward from both side edges of the bottom plate, and left and right side walls respectively extending downward from both side edges of the top plate. An upper block and connecting means for connecting the upper block to the lower block, and the upper and lower sides of the upper block are vertically connected when the lower end surfaces of the left and right side walls of the upper block are overlapped with the upper end surfaces of the corresponding left and right side walls. In the concrete block product with a combination of upper and lower sides forming a space closed in the direction, the connecting means is disposed at least in the recessed portions formed on the left and right side walls of the upper block and inside the side walls of the upper block and the lower block. The upper block is exposed in the recessed portion of the upper block and the upper end thereof is fixed in the recessed portion of the upper block, and the lower end thereof is fixed in the lower block. A wire rod fixed inside, a cylindrical body disposed at a portion of the wire rod corresponding to a position where the lower end surfaces of the left and right side walls of the upper block overlap with the upper end surfaces of the corresponding left and right side walls of the lower block, and the upper block A recess is formed in the lower block and accommodates the cylinder, and a filler is filled in the recess and the cylinder to stop the movement of the wire in the cylinder.

  With such a configuration, when the upper block and the lower block are connected by the connecting means, the wire rod is stopped by the filler filled in the cylinder, so that the wire rod has a large diameter. Therefore, it is possible to reliably prevent the upper block and the lower block from being shifted.

  In order to easily fill the cylinder with the filler, it is preferable that the cylinder is formed of a cylinder having a peripheral wall, and the peripheral wall has a through hole that communicates the inside and the outside. As the filler, a grout having excellent fluidity is suitable.

  In order to easily insert the wire rod into the cylindrical body, the upper block has an upper concave portion that accommodates almost half of the cylindrical body in a state where the upper block and the lower block are connected, and the lower block has a lower concave portion that is combined with the upper concave portion. It is preferable that the upper recess is opened at the lower end surface of the upper block and the lower recess is opened to the upper end surface of the lower block with the same size as the upper recess. In such a configuration, in order to facilitate filling of the filler, the upper concave portion and the lower concave portion are provided in the side wall, and a through hole that communicates with either the upper concave portion or the lower concave portion is provided in the side wall. Is desirable.

  In addition, the connection structure of the upper and lower combined concrete block product of the present application has a lower block having left and right side walls extending upward from both side edges of the bottom plate, and left and right side walls extending downward from both side edges of the top plate. And connecting means for forming a space closed in the vertical direction when the upper block is connected with the lower end surfaces of the left and right side walls of the upper block overlapped with the upper end surfaces of the corresponding left and right side walls of the lower block. In the connecting structure of the upper and lower combined concrete block products to be connected by the connecting means, the connecting means is disposed at least inside the recessed portions formed on the left and right side walls of the upper block and inside the side walls of the upper block and the lower block. It is exposed in the concave part of the block and its upper end is fixed in the concave part of the upper block and its lower end is in the lower block. Wire rods that are fixed to each other, a cylindrical body that is disposed at a portion of the wire rod corresponding to a position where the lower end surfaces of the left and right side walls of the upper block overlap with the upper end surfaces of the corresponding left and right side walls of the lower block, the upper block, and the lower block In a state in which the upper block and the lower block are connected to each other, the recess formed in the block and accommodating the cylinder, and the filler and the filler filled in the cylinder and stopping the movement of the wire rod in the cylinder. The joint formed by the lower end surfaces of the left and right side walls of the upper block and the upper end surfaces of the left and right side walls of the lower block can be partially opened when an external force is applied.

  According to such a configuration, when an external force is applied to the upper and lower combined concrete block product connected to the upper block and the lower block, the lower end surfaces of the left and right side walls of the upper block and the left and right side walls of the lower block are Even if the joint at the abutting portion with the upper end surface is partially opened, a wire rod having a small outer diameter can be used. Thereby, it becomes possible to reduce the expense concerning material, and it becomes possible to improve economical efficiency.

  In the present invention, as described above, when the upper block and the lower block are connected by the connecting means, the movement of the wire rod is stopped by the filler filled in the tube member. It is possible to surely prevent the upper block and the lower block from shifting without using the same.

  Further, according to the present invention, when an external force is applied to the vertically combined concrete block product connected to the upper block and the lower block, the upper end of the left and right side walls of the upper block and the upper and lower side walls of the lower block are Even if the joint at the end face with the end face is partially opened, a wire having a small outer diameter can be used. Accordingly, the cost for the material can be reduced, and the economy can be improved.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  The vertically combined concrete block product (hereinafter referred to as a concrete block product) 100 according to this embodiment can construct a culvert for sewerage, for example, by laying continuously in the vertical direction. The concrete block product 100 includes a lower block 1, an upper block 2 combined on the lower block 1, and a connecting means 3 that connects the lower block 1 and the upper block 2. When the concrete block product 100 is connected by overlapping the lower end surfaces 21a, 22a of the left and right side walls 21, 22 of the upper block 2 with the upper end surfaces 11a, 12a of the corresponding left and right side walls 11, 12 of the lower block 1. In addition, a space opened in the front-rear direction (depth direction) and closed in the up-down direction is formed.

  The lower block 1 has left and right side walls 11 and 12 extending upward from both side edges of the bottom plate 13 respectively. In the lower block 1, the right side wall 12 and the left side wall 11 have different lengths (heights). In the case of this embodiment, the right side wall 12 is longer than the left side wall 11. On the other hand, the upper block 2 has left and right side walls 21, 22 that extend downward from both side edges of the top plate 23. Since the upper block 2 corresponds to the lower block 1, the length (height) of the right side wall 22 and the left side wall 21 is different. That is, the right side wall 22 of the upper block 2 is longer than the left side wall 21. With such a structure, when the upper block 2 is connected to the lower block 1, the total length of the right side walls 12 and 22 of the lower block 1 and the upper block 2 is the lower block 1 and the upper block 2. The total length of the left side walls 11 and 21 is equal, and the top plate 23 can be parallel to the bottom plate 13. In this embodiment, the through holes 4 are provided so as to cross 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 inserted PC steel bar 5 is pulled so as to have a predetermined tension, both ends thereof are fixed, and a predetermined amount of prestress is introduced.

  In the upper block 2 and the lower block 1, the connecting means are disposed on the left and right side walls 11, 12, 21, 22 at positions separated from the upper end surfaces 11 a, 12 a and a predetermined distance from the lower end surfaces 21 a, 22 a. 3, a lower concave portion 31 and an upper concave portion 32 are formed. In addition to the upper concave portion 32 and the lower concave portion 31, the connecting means 3 includes wire rod insertion holes 33 and 34, a PC steel rod 35 as a wire rod, a cylinder 36 as a cylindrical body, upper and lower concave portions 37 and 38, and a filler. It is comprised by the grout 39 which is. The lower concave portion 31, the upper concave portion 32, the wire rod insertion holes 33 and 34, and the upper and lower concave portions 36 and 37 are spaced apart from each other in the longitudinal direction (depth direction) in the upper block 2 and the lower block 1, respectively. It is provided at a set position.

  The upper concave portion 32 and the lower concave portion 31 are opened on the inner surfaces of the left and right side walls 21, 22, 11, and 12 and have a substantially rectangular parallelepiped shape. The lower recessed portion 31 of the lower block 1 communicates with a lower wire insertion hole 33 located inside the side walls 11, 12 above the lower recessed portion 31 and opened at the upper end surface portions of the side walls 11, 12. Similarly, the upper recessed portion 32 of the upper block 2 has an upper wire insertion hole 34 that is located inside the side walls 21, 22 below the upper recessed portion 32 and opens at the lower end surface portions of the side walls 21, 22. Communicate. In this embodiment, the upper concave portion 32 is provided with a pull rod insertion hole 6 whose upper end opens into the top plate 23 and communicates with the upper concave portion 32. When the upper block 2 and the lower block 1 are connected, the pull rod insertion hole 6 is connected to the upper end of the PC steel bar 35 inserted into the lower wire insertion hole 33 and the upper wire insertion hole 34. An insertion hole to be inserted.

  The lower wire rod insertion hole 33 and the upper wire rod insertion hole 34 are located at substantially the center in the thickness direction of the side walls 11, 12, 21, 22, and when the upper block 2 is stacked on the lower block 1 for connection. The lower concave portion 31 and the upper concave portion 32 communicate with each other in a substantially straight line. In this embodiment, the lower wire rod insertion hole 33 communicates with the lower recesses 38 provided in the left and right side wall interiors 11 and 12 and has an inner diameter substantially equal to the outer diameter of the PC steel rod 35. The lower recess 38 has a shape in which the truncated cone is inverted, and is open to the upper end surface of the lower block 1. The lower recess 38 has a depth that is approximately half the length of a cylinder 36 made of, for example, a steel tube, which will be described later, and its bottom surface 38 a has a diameter that is substantially the same as the outer diameter of the cylinder 36. In addition, the upper end of the lower wire rod insertion hole 33 is opened substantially at the center of the bottom surface 38a. In this embodiment, a lateral through hole 38 b that opens to the inner surfaces of the side walls 11 and 12 of the lower block 1 and communicates with the lower recess 38 is provided. The lateral through hole 38b is for filling the grout 39 into the cylinder 36.

  Similarly, the upper wire insertion hole 34 communicates with an upper recess 37 provided in the left and right side walls 21 and 22. The upper concave portion 37 has substantially the same size as the lower concave portion 38, has a truncated cone shape, unlike the lower concave portion 38, and opens at the lower end surface of the upper block 2. The upper concave portion 37 is approximately half the height of the cylinder 36, and the ceiling surface 37a has a diameter substantially the same as the outer diameter of the cylinder 36, and is approximately at the center of the ceiling surface 37a. The lower end of the upper wire insertion hole 34 is open.

  The cylinder 36 has a peripheral wall 36 a and has an inner diameter larger than the outer diameter of the wire 35. A through hole 36 b communicating with the inside of the peripheral wall 36 a is provided near the lower end of the peripheral wall 36. In this embodiment, one through hole 36b is provided, but a plurality of through holes 36b may be provided at substantially the same height.

  The PC steel bar 35, which is a wire rod inserted into the upper wire rod insertion hole 34 and the lower wire rod insertion hole 33, has male threads formed at its upper and lower ends. In this embodiment, since the outer diameter of the PC steel rod 35 and the inner diameter of the lower wire rod insertion hole 33 are substantially equal, the PC steel rod 35 is inserted into the lower wire rod insertion hole 33 so that there is almost no gap between them. Does not exist. Accordingly, when the grout 39 is filled in the cylinder 36, the grout 39 can be prevented from flowing into the lower wire insertion hole 33, so that the filling efficiency can be improved. The PC steel bar 35 may take a form embedded in the underwire insertion hole 33. That is, when the lower block 1 is manufactured, the PC steel bar 35 is placed at a predetermined position of the block manufacturing formwork, and concrete is placed on the formwork to substantially form the lower wire insertion hole 33. Without doing so, the PC steel bar 35 is inserted into the lower wire insertion hole 33.

  The assembly of the concrete block product 100 is as follows. First, the lower block 1 is installed at a construction position at the construction site, and the PC steel bar 35 is inserted into all the lower wire rod insertion holes 33 through the lower recess 38. The inserted PC steel bar 35 has a lower end reaching the inside of the lower recessed portion 31. An anchor plate P is attached to the lower end of the PC steel bar 35, and then a fixing nut N is screwed onto the male screw. Further, the PC steel rod 35 is passed through the cylinder 36 and the cylinder 36 is placed in the lower recess 38. In this case, it is desirable to position the through hole 36b in the peripheral wall 36a of the cylinder 36 in the direction of the lateral through hole 38b of the lower recess 38.

  Next, the upper block 2 is stacked on the lower block 1 in order to connect to the lower block 1. In this case, each PC steel bar 35 is inserted into each upper wire insertion hole 34 via the upper recess 37 of the upper block 2. Then, the lower end surface 22a of the upper block 2 is superimposed on the upper end surface 12a of the lower block 1 and positioned. That is, the outer surfaces of the side walls 11 and 12 of the lower block 1 and the outer surfaces of the side walls 21 and 22 of the upper block 2 are substantially flush, and the coupling end surface 15 of the lower block 1 and the coupling end surface 25 of the upper block are substantially flush. The upper block 2 and the lower block 1 are adjusted so as to be stacked. In this case, the cylinder 36 stands on the bottom surface 38a of the lower recess 38, and contacts the taper surface 37a of the upper recess 37 of the upper block 2 when the upper block 2 descends, and contacts the ceiling surface 37b. To be guided.

  Thereafter, the nut N screwed to the lower end of each PC steel bar 35 is adjusted in accordance with the fixing position, while the nut N is screwed to the upper end of the PC steel bar 35 through the anchor plate P. Assuming that. Then, the pull rod 7 inserted into the pull rod insertion hole 6 is connected to the male screw at the upper end of the PC steel rod 35 via a coupler. Since the upper end of the pull rod 7 protrudes from the upper end of the pull rod insertion hole 6 that opens to the top plate 23, the upper end of the pull rod 7 is connected to the hydraulic jack J, and the PC steel rod 35 is pulled so as to have a predetermined tension. To do. The pulling operation of the PC steel bar 35 is performed for each PC steel bar 35. In a state where the PC steel bar 35 is pulled with a predetermined tension, the nut N screwed to the male screw at the upper end of the PC steel bar 35 is finally tightened and fixed in the upper recessed portion 32. It should be noted that the tension of the PC steel bar 35 after the nut N is finally tightened is such that, after the assembly of the lower block 1 and the upper block 2 is completed, an external force is applied to the side walls 11 of the lower block 1 and the upper block 2. 12, 21 and 22 can be opened, that is, the strength is adjusted such that an allowable gap is generated in the concrete block product between the upper end surfaces 11a and 12a and the lower end surface 21a22a. Thereafter, the coupler is loosened, and the coupler and the pull rod 7 are removed from the PC steel rod 35.

  As described above, after applying a predetermined tension to each PC steel bar 35, a space in the side wall formed by connecting the lower concave portion 38 and the upper concave portion 37 is formed from the lateral through hole 38 b of the lower block 1. The grout 39 is filled (the movement of the grout is indicated by arrows in FIG. 4). The grout 39 that has reached the inside of the lower recess 38 through the lateral through hole 38b flows into the inside of the cylinder 36 from the through hole 36b of the cylinder 36 as its filling amount increases. Finally, the grout 39 is filled in the cylinder 36 and in the lower and upper recesses 38 and 37 (the state shown in FIG. 4). That is, in this embodiment, the grout 39 fills both the inside of the cylinder 36 and the surrounding space outside the cylinder 36 surrounding the cylinder 36.

  Thereafter, with respect to the concrete block product 100 that has been assembled and constructed as described above, the same type of concrete block product 100 is reversed in the front and back direction, that is, the front end of the concrete block product 100 that has been assembled is moved back. The direction is determined to be the end, and the concrete block product 100 that has been completed is connected. In addition, when connecting, it is fastened and fixed by the vertically tightened PC steel bar 8, and for this purpose, the concrete block product 100 includes a vertically tightened steel bar hole 81 into which the vertically tightened PC steel bar 8 is inserted into the hunch part H, and It is provided with a laterally recessed portion 82 provided at a substantially intermediate position in the longitudinal direction of the haunch portion H for fixing both ends of the vertically tightened PC steel rod 8. The tension and fixation of the vertically tightened PC steel bar 8 are the same as those of the PC steel bar 35 described above.

  In this way, the lower block 1 and the upper block 2 are connected by the PC steel bar 35, and the PC steel bar 35 is covered with the cylinder 36 at the boundary portion between the lower block 1 and the upper block 2, and the cylinder 36. In this structure, the grout 39 is filled, and the PC steel bar 35 is positioned and fixed in the cylinder 36. The cylinder 36 is fixed by hardening a grout 39 filled in a space formed by the lower recess 38 and the upper recess 37.

  In this concrete block product 100, a cylinder 36 is fixed by a grout 39 in a space formed by the lower recess 38 and the upper recess 37, and the lower block 1 and the upper block 2 are connected to each other with a predetermined tension. The PC steel bar 35 is fixed by a grout 39. The PC steel bar 35 is fixed at a position that passes through substantially the center of the cylinder 36 in a state where a predetermined tension is exerted. With such a structure, when an external force is applied, it can function as a key for the joints or joints of the side walls 11, 12, 21, and 22 between the lower block 1 and the upper block 2, and the lower block 1 The upper block 2 can be prevented from shifting with respect to 1.

  Therefore, the upper block 2 needs to have a large diameter PC steel bar 35 with respect to the lower block 1 so as to prevent positional displacement due to frictional force between the upper end surfaces 11a and 12a and the lower end surfaces 21a and 22a. In addition, the tension can be reduced with respect to such a PC steel bar 35. As a result, the joints of the side walls 11, 12, 21, and 22 between the lower block 1 and the upper block 2 are opened on the inner surface side when an external force is applied, and thus a gap is generated. In addition, the upper block 2 can be prevented from shifting. Moreover, since it becomes possible to use a wire having a thinner outer diameter than in the past, the material cost for the PC steel bar 35 can be reduced.

  Moreover, even when the joints of the side walls 11, 12, 21, 22 between the lower block 1 and the upper block 2 are opened, the grout 39 exists around the cylinder 36, and the grout is also present inside the cylinder 36. 39, the PC steel bar 35 is covered, so that the PC steel bar 35 can be reliably prevented from rusting. That is, when the seam is opened, cracks may occur in the grout 39 existing around the cylinder 36, that is, outside the cylinder 36, but the cylinder 36 is distorted by the displacement of the upper block 2. There is almost no. Therefore, no crack is generated in the grout 39 in the cylinder 36, and the PC steel bar 35 can be reliably prevented from being rusted.

  In the above-described embodiment, the left and right side walls 11, 12, 21, and 22 have been described as having different lengths, but the lengths may be equal. In this case, the lengths of the side walls 11 and 12 of the lower block 1 and the side walls 21 and 22 of the upper block 2 may be the same or different.

  Moreover, although the cylinder 36 made from a steel pipe was demonstrated as a cylinder, if it is the material and shape which can incorporate a filler like grout 39, it will not be limited to the said embodiment. For example, it may be a cylinder made of aluminum or synthetic resin. With these materials, the weight can be reduced. In addition to the grout 39, the filler may be a room temperature curable synthetic resin.

  In addition, as shown in FIG. 5, an unbonded PC steel bar 235 is disposed in the lower block 201, and the PC steel bar 291 is coupled to the unbonded PC steel bar 235 via the coupler C in the lower recess 238. And the upper block 202 may be connected. That is, an unbonded PC steel bar 235 having a length substantially the same as the height of the side wall 211 that fixes the lower end 235 a at the lower end portion of the side wall 211 of the lower block 201 is disposed inside the side wall 211 of the lower block 201. The upper end of the unbonded PC steel bar 235 is exposed in the lower recess 238 provided in the lower block 235.

  When the upper block 202 is placed on the lower block 235, the coupler C is screwed onto the upper end of the unbonded PC steel rod 235, and the PC steel rod inserted through the upper wire insertion hole 234 of the upper block 202 into the coupler C. The lower end of 291 is screwed. At this time, the cylinder 36 is passed from the lower end of the PC steel rod 291 inserted into the upper wire rod insertion hole 234.

  Thereafter, the nut N is temporarily fixed to the upper end portion of the PC steel bar 291 exposed in the upper concave portion 232 opened on the upper surface of the side wall 221 of the upper block 202 via the fixing plate 292, and the upper block 202 is fixed to the lower block 202. 201 is placed in alignment. Then, the PC steel bar 291 is pulled with a predetermined traction force, and the nut N is tightened to fix the PC steel bar 291. Thereafter, as in the above embodiment, grout (not shown) is injected from the lateral through hole 238b communicating with the lower recess 238 of the lower block 201 to insert the inside of the cylinder 36, the lower and upper recesses 238, 237, and the upper wire rod. The inside of the hole 234 and the inside of the upper recessed portion 232 are filled with grout. FIG. 5 shows a state before filling the grout, and the movement of the grout when the grout is injected is indicated by an arrow in the figure. In addition, since the basic structure and configuration of the concrete product, such as a configuration in which adjacent concrete products are connected, that is, a configuration in which vertical tightening or prestress is introduced, are the same as those in the above embodiment, illustration and description are omitted.

  In this example, since the unbonded PC steel bar 235 is disposed in the lower block 201, it is not necessary to pull the PC steel material using a pull rod as in the above embodiment, and therefore, the number of man-hours can be reduced.

  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. The side view which shows a part of same embodiment in a cross section. Sectional drawing seen from the front of the embodiment. Sectional drawing which expands and shows the principal part of the embodiment. Sectional drawing of the principal part of other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lower block 2 ... Upper block 3 ... Connecting means 11, 12, 21, 22 ... Side wall 11a, 12a ... Upper end surface 21a, 22a ... Lower end surface 31 ... Lower recessed part 32 ... Upper recessed part 33 ... Lower wire material insertion hole 34 ... Upper wire insertion hole 35 ... Unbonded PC steel rod 36 ... Cylinder 39 ... Grout

Claims (6)

A lower block having left and right side walls extending upward from both side edges of the bottom plate, an upper block having left and right side walls extending downward from both side edges of the top plate, and an upper block connected to the lower block Upper and lower combination concrete blocks that form a closed space in the up-down direction when the lower end surfaces of the left and right side walls of the upper block are overlapped and connected to the upper end surfaces of the corresponding left and right side walls of the lower block. In the product,
A connecting means is disposed at least inside the left and right side walls of the upper block and inside the side walls of the upper block and the lower block, and is exposed to the concave portion of the upper block so that its upper end is A wire rod fixed in the recessed portion and having its lower end fixed in the lower block, and a wire rod corresponding to a position where the lower end surfaces of the left and right side walls of the upper block overlap with the upper end surfaces of the corresponding left and right side walls of the lower block. A cylindrical body disposed in the part, a recess formed in the upper block and the lower block to accommodate the cylindrical body, and a filling material that fills the concave part and the cylindrical body to stop the movement of the wire in the cylindrical body An up-and-down combined concrete block product.   The upper and lower combined concrete block product according to claim 1, wherein the cylindrical body is formed of a cylinder having a side wall, and the side wall has a through hole that communicates the inside and the outside.   The upper and lower combined concrete block product according to claim 1 or 2, wherein the filler is grout.   The concave portion is formed in the upper block, and includes an upper concave portion that accommodates almost half of the cylinder in a state where the upper block and the lower block are connected, and a lower concave portion that is formed in the lower block and combined with the upper concave portion. The upper and lower combination concrete block product according to claim 1, 2 or 3, wherein the lower concave surface is opened at the lower end surface, and the lower concave portion is opened to the upper end surface of the lower block with the same size as the upper concave portion.   The upper and lower combination concrete block product according to claim 4, wherein an upper recess and a lower recess are provided in the side wall, and a through-hole communicating with either the upper recess or the lower recess is provided in the side wall. A lower block having left and right side walls extending upward from both side edges of the bottom plate, and an upper block having left and right side walls respectively extending downward from both side edges of the top plate, and left and right side walls of the upper block In the connecting structure of the upper and lower combined concrete block product that is connected by connecting means so as to form a space closed in the vertical direction when the lower end surface of the upper block is connected to the upper end surfaces of the corresponding left and right side walls of the lower block.
A connecting means is disposed at least inside the left and right side walls of the upper block and inside the side walls of the upper block and the lower block, and is exposed to the concave portion of the upper block so that its upper end is A wire rod fixed in the recessed portion and having its lower end fixed in the lower block, and a wire rod corresponding to a position where the lower end surfaces of the left and right side walls of the upper block overlap with the upper end surfaces of the corresponding left and right side walls of the lower block. A cylindrical body disposed in the part, a recess formed in the upper block and the lower block to accommodate the cylindrical body, and a filling material that fills the concave part and the cylindrical body to stop the movement of the wire in the cylindrical body When the upper block and the lower block are connected, the joint formed by the lower end surfaces of the left and right side walls of the upper block and the upper end surfaces of the left and right side walls of the lower block is external force. Connection structure of the upper and lower combination type concrete block products obtained partially open when the tears.

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