JP3127563U - Multiple box culvert - Google Patents

Abstract

To provide an ultra-large multiple box culvert using precast concrete members that can be assembled and integrated at a construction site.
A pair of upper and lower side walls 20a constituting the upper part from the center height position of each of the left and right side walls 20 and a left and right top plate part 21a from the upper end of the side wall 20 to the vicinity of the upper end of the partition wall. Left and right upper side building blocks 30 and left and right bottom plate portions 22a from the center height positions of the left and right side walls 20 to the lower half portions 20b of the side walls and the lower ends of the side walls 20 to the lower end of the partition walls. A pair of left and right lower side constituting blocks 31, a partition wall 23, a top plate overhanging portion 21 b constituting a part of the top plate on both upper ends of the partition wall, and a bottom plate on both lower end sides of the partition wall. A section having a base plate overhanging portion 22b constituting a part is provided with a partition part constituting block 32 having a substantially I-shaped cross section, and is formed by connecting the blocks, and is formed in a rectangular cylindrical shape having a partition inside. Ream box culvert.
[Selection] Figure 1

Description

  The present invention is a precast concrete box culvert that is embedded in an embankment such as a road or a railroad and is used as a passage or waterway, and assembles a plurality of precast concrete blocks. The present invention relates to a large multiple box culvert having a plurality of internal spaces.

  Conventionally, when burying a box culvert in an embankment such as a road or a railroad, a so-called precast concrete box manufactured in advance in a factory for the purpose of shortening the construction period, reducing costs and maintaining quality. Calvert is used.

  In addition, large precast concrete box culverts used for passages and three-dimensional intersections where people and vehicles pass are large and heavy, making it difficult to transport them alone. There is known a method in which a box culvert is assembled and molded by combining the blocks and transporting them to a construction site.

  Known methods for assembling and integrating such precast concrete blocks include bolt joining using bolts and PC joining using PC tension members.

  Conventionally, a method for dividing a box culvert into a plurality of blocks is generally as shown in FIGS. 6A, 6B, and 6C. Each of these shows a double box culvert having a top plate 1, a bottom plate 2, left and right side walls 3, 4, and a partition wall 5, and FIG. 6A shows two single box culverts 6, 7. In this example, two box culverts A are formed by joining the side walls 5a and 5a on the joining side of the two box culverts to form a partition wall 5.

  FIG. 6B shows two box culverts B by joining the upper and lower blocks 8 and 9 which are divided into upper and lower parts in a state where the vertical central portions of the side walls 3 and 4 and the partition wall 5 are cut in the horizontal direction. It shows the case.

FIG. 6C shows a state in which both side walls 3, 4 and partition 5 are separated from top plate 1 and bottom plate 2, and both side walls 3, 4 and partition 5 are formed on the bottom surface of top plate 1 and the top surface of bottom plate 2. The case where the upper and lower end faces are joined to form a box culvert C is shown (for example, Patent Document 1). In each figure, reference numeral 10 denotes a joint (in other words, a divided portion).
Japanese Patent Laid-Open No. 2002-332683

  However, in the conventional technique as described above, when a large multiple box culvert in which one box exceeds 8 meters, the conventional divided block method, for example, in the case of the method shown in FIG. One block is bulky and heavy, and in the case of the method shown in FIGS. 6 (b) and 6 (c), the upper and lower blocks are long and heavy. There is a problem that it becomes difficult.

  Further, in the conventional divided box multiple culvert as described above, the bending moment of the top plate becomes very large. FIG. 7 is a stress diagram showing these bending moments. When the bending moment of the top plate increases, the bending moment applied to the side wall also increases.

  In order to cope with the bending moment of the top plate, the thickness of each member is extremely thick in an ultra-large multiple box culvert in which one box exceeds 8 meters. Moreover, even if it divides | segments into each member and manufactures in order to implement | achieve the super-large-sized box culvert made from precast concrete, the weight of one member is very large and it becomes difficult to convey. Furthermore, there is a problem that high performance corresponding to the weight of members is required for heavy machinery necessary for assembly even at the construction site, and the cost is higher than that of on-site concrete.

  SUMMARY OF THE INVENTION In view of the above-described problems of the prior art, the present invention has an object to provide an ultra-large multiple box culvert made of a precast concrete member that can be assembled and integrated at a construction site.

  In order to solve the conventional problems as described above and achieve the intended purpose, the invention according to claim 1 includes: left and right side walls, top plates between the upper ends of the side walls, bottom plates between the lower ends, and both side walls. In the multiple box culvert having a partition between the top plate and the bottom plate, the upper half of each side wall constituting the upper part from the center height position of each of the left and right side walls And a pair of left and right upper side constituent blocks integrally having left and right top plate portions from the upper end of the side wall to the vicinity of the upper end of the partition wall, and each of which constitutes a lower portion from the center height position of each of the left and right side walls. A pair of left and right lower side component blocks integrally having a lower half of the side wall and left and right bottom plate portions from the lower end of the side wall to the vicinity of the lower end of the partition wall, and a part of the top plate on both sides of the partition wall and the upper end of the partition wall The overhanging portion for the top plate and the both sides of the lower end of the partition wall A partition having a substantially I-shaped section having a bottom plate overhang part that constitutes a part of the bottom plate, and a block having a substantially I-shaped cross section. The blocks are connected to each other and assembled into a rectangular cylinder having a partition inside. There is in being.

  A feature of the invention described in claim 2 is the multiple box culvert according to claim 1, wherein one partition wall constituting block is used and a pair of internal spaces are formed on both sides thereof. .

  A feature of the invention described in claim 3 is the multiple box culvert according to claim 1, wherein a plurality of the partition wall constituent blocks are used, and the top plates of the adjacent partition wall constituent blocks are used. An internal space is also formed between the partition walls using a top plate block that forms a top plate between the overhang portions and a bottom plate block that forms a bottom plate between the overhang portions for the bottom plate of the partition wall configuration block. It is to have done.

  A feature of the invention described in claim 4 is that, in addition to the configuration described in claim 1, 2 or 3, the connection between the blocks is hinged connection.

  The multiple box culvert according to the present invention consists of the upper half of each side wall constituting the upper part from the center height position of the left and right side walls, and the left and right top plates from the upper end of the side wall to the upper end of the partition wall. A pair of left and right upper side constituting blocks integrally formed with each other, each side wall lower half part constituting the lower part from the center height position of each of the left and right side walls, and left and right parts from the lower end of the side wall to the lower end of the partition wall A pair of left and right lower side constituent blocks integrally having a bottom plate portion, a partition plate, an overhang portion for a top plate forming a part of the top plate on both sides of the upper end of the partition wall, and a bottom plate on both sides of the lower end of the partition wall. A cross section having a part of the bottom plate overhang part constituting a part is configured with a substantially I-shaped partition wall configuration block, and the blocks are connected to each other and assembled into a rectangular tube shape having a partition wall inside. The top plate length is over 8m Even so that a large box culvert, transportation of each block, rather than the special means of transport, can be made capable of land transportation by conventional tracks.

  In addition, since each joint portion of the plurality of members is hinged, the bending moment applied to the top plate, the bottom plate, both side walls, and the partition wall is not transmitted from each joint portion to each member, and the burden on each member is reduced. . Moreover, since it is not joining by PC tension material, the operation | work which tensions PC tension material is not required, it can construct easily without requiring a special technique, and a construction period can also be shortened.

  Next, an embodiment of a multiple box culvert according to the present invention will be described.

  FIG. 1 shows a double box culvert which is an example of a multiple box culvert according to the present invention. This double box culvert C is provided with a top plate 21 between the upper ends of the left and right side walls 20, 20, and a bottom plate 22 between the lower ends thereof. A partition wall 23 is provided, and cylindrical spaces are formed on the left and right sides of the partition wall 23. In other words, the outer peripheral surfaces are formed by the side walls 20, 20, the top plate 21, and the bottom plate 22, and the inside thereof is partitioned by the partition wall 23 to form a pair of cylindrical internal spaces.

  The double box culvert C is configured by combining a pair of left and right upper side constituent blocks 30 and 30, and a pair of left and right lower side constituent blocks 31 and 31 and a partition wall part constituting block 32. Each of these blocks is a precast concrete block manufactured in a factory, which is carried to the site and assembled as shown in FIG.

  The pair of left and right upper side constituent blocks 30, 30 are formed from the center height positions of the left and right side walls 20, 20 to the upper half portions 20 a constituting the upper part and from the upper end of the side wall to the vicinity of the upper end of the partition wall. The cross section having the left and right top plate portions 21a integrally has a substantially L-shaped structure.

  A pair of left and right lower side component blocks 31, 31 are provided on the left and right side walls 20 from the center height position of each side wall lower half 20 b constituting the lower part and the left and right sides from the lower end of the side wall to the lower end of the partition wall. The cross-section having the bottom plate portion 22a integrally has a substantially L-shaped structure.

  The partition wall constituting block 32 includes the partition wall 23, top plate overhang portions 21b and 21b forming part of the top plate on both sides of the upper end of the partition wall, and bottom plate for forming a part of the bottom plate on both sides of the lower end of the partition wall. The cross section which has the overhang | projection parts 22b and 22b integrally has the structure of substantially I shape.

  Each of the joint portions 35, 35 and 36, 36... Between these blocks 30, 30, 31, 31 and 32 has a hinge connection structure, and the upper and lower side wall upper half portions 20a and 20b of the side walls 20 are connected to each other. As shown in FIGS. 1 and 2, the joint has joint protrusions 40a and 40b in which approximately half of the thickness is alternately projected, and the joint protrusions 40a and 40b are joined to each other. Assembled.

  Moreover, as shown in FIG. 1 and FIG. 3, the joint portions 35, 35 of the partition wall portion configuration block 32, the left and right upper side configuration blocks 30, 30 and the left and right lower side configuration blocks 31, 31, A pedestal portion 41a having a thickness corresponding to the lower half of the upper projecting portions 21b, 21b and 22b, 22b of the constituent block 32 is protruded integrally with the upper constituent blocks. 30 and 30 and left and right lower side component blocks 31 and 31 are provided with support portions 41b protruding from the top half portions of the top plate portions 21a and 21a and the bottom plate portions 22a and 22a by the thickness of the upper half. In addition, as shown in FIG. 1, the support portions 41b are placed on the pedestal portions 41a and joined to each other.

  As shown in FIG. 2, in the joint portion 35 of the both side walls 20, 20, an anchor 50 is embedded in one joint protrusion 40a, and a coupler 51 is integrally provided at the tip of the anchor 50. The tip of 51 is exposed to the joint surface 52 side on the other joint projection side. The other protrusion 40b has a recess 54 for accommodating a fastener on a surface opposite to the bonding surface 53 facing the bonding surface 52, and a bolt insertion hole 55 is formed through the central portion thereof. ing.

  The joint protrusions 40a and 40b are joined between the joint surfaces 52 and 53 via a cushioning material 56 made of a rubber-like elastic material, and the fastening bolt 57 is inserted from the recess 54 side through the bolt insertion hole 55. The hinge is coupled to the coupler 51, the washer 58 and the nut 59 are fitted to the other end, and the nut 58 is fastened so that the hinge coupling structure can be bent within the deformation range of the cushioning material.

  Furthermore, as shown in FIG. 1 and FIG. 3, the joining portions 36, 36... Of the partition wall configuration block 32 and the left and right upper side configuration blocks 30, 30 and the left and right lower side configuration blocks 31, 31. An anchor 50 is embedded in one pedestal portion 41a, and a coupler 51 is integrally provided at the tip of the anchor 50, and the tip of the coupler 51 is exposed to the joint surface 62 side on the support portion 41b side. The support portion 41b is formed with a concave portion 54 for accommodating a fastener on a surface opposite to the joint surface 63 facing the joint surface 62, that is, an upper surface side, and a bolt insertion hole 55 is opened through the central portion thereof. Yes.

  The support portion 41b is joined on the pedestal portion 41a between the joining surfaces 62 and 63 via a cushioning material 56 made of a rubber-like elastic material, and the fastening bolt 57 is inserted from the concave portion 54 side through the bolt insertion hole 55. The hinge is coupled to the coupler 51, the washer 58 and the nut 59 are fitted to the other end, and the nut 58 is fastened so that the hinge coupling structure can be bent within the deformation range of the cushioning material.

  FIG. 4 is a stress diagram showing the bending moment applied to the box culvert C in this embodiment. Since the joints 35 and 36 are hinge-coupled in this way, the moment at each joint 40 is zero, so the bending moment from each member to the member is not transmitted, and the moment applied to each member is reduced. Is done.

  Moreover, although the above-mentioned Example demonstrated the example which performs the connection between the right-and-left upper part structure blocks 30 and 30 and the left and right lower-side structure blocks 31 and 31, and the top plate member 22 and the bottom plate member 24 with a volt | bolt. In addition, you may use a PC tendon etc. as a connection tool.

  Moreover, although the shape of each joining part was formed in the step shape as shown in FIG.2, FIG.3, each member should just be hinge-joined and the structure is not restricted to the above-mentioned Example.

  Moreover, although the example which connects the fastening volt | bolt 57 to the anchor 50 via the coupler 51 was demonstrated, you may use what integrally formed the anchor 50 and the volt | bolt 57 for fastening.

  Furthermore, in the above-described embodiment, the double box culvert has been described. However, as shown in FIG. 5, the multiple box culvert according to the present invention uses a plurality of partition wall configuration blocks 32, and each partition wall configuration block 32, The triple box culvert D may be assembled and formed on the plate-shaped top plate portion constituting block 21c and the bottom plate portion constituting block material 22c. In FIG. 5, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Both ends of the top plate portion constituting block 21c and the bottom plate portion constituting block 22c and the partition portion constituting block 32 are coupled with the hinge joint structure having the same structure as the joint portion 36 shown in FIG. To do.

  In addition, although not shown in the drawing, a plurality of partition wall constituting blocks 32 are used in the same manner, and they are connected by a plate-like top plate portion constituting block 21c and a bottom plate portion constituting block material 22c. Multiple box culverts such as 5 or 5 can be formed.

It is a front view which shows the 1st Example which implemented this invention to the double box culvert. It is an expanded sectional view which shows the joining state in the side wall same as the above. It is an expanded sectional view which shows the joining state in a top plate same as the above. It is a stress figure which shows the bending moment concerning a double box culvert same as the above. It is a front view which shows the 2nd Example which implemented this invention to the triple box culvert. It is a schematic diagram which shows the division | segmentation method of the conventional box culvert. It is a stress figure which shows the bending moment in the conventional box culvert.

Explanation of symbols

C Double box culvert D Triple box culvert 20 Side wall 20a Left and right side wall upper half part 20b Left and right side wall lower half part 21 Top plate 21a Left and right top plate part 21b Left and right top plate overhang part 21c Top plate part building block 22 Bottom plate 22a Left and right bottom plate portions 22b Bottom plate overhang portion 22c Bottom plate portion constituting block material 23 Partition 30 Upper portion constituting block 31 Lower portion constituting block 32 Partition portion constituting block 35 Joining portion 36 Joining portions 40a and 40b Joining protrusion 41a Pedestal Portion 41b Supporting portion 50 Anchor 51 Coupler 52 Joint surface 53 Joint surface 54 Recess 55 Bolt insertion hole 56 Buffer material 57 Fastening bolt 58 Washer 59 Nut

Claims (4)

In a multiple box culvert comprising left and right side walls, a top plate between the upper ends of both side walls, a bottom plate between the lower ends, and a partition wall interposed between the top plate and the bottom plate at an intermediate position between both side walls,
A pair of left and right upper portions integrally including upper side half portions of the side walls constituting the upper portion from the center height position of the left and right side walls and left and right top plate portions from the upper end of the side walls to the vicinity of the upper end of the partition walls. A building block;
A pair of left and right lower side portions integrally including lower half portions of the side walls constituting the lower portion from the center height positions of the left and right side walls and left and right bottom plate portions from the lower end of the side walls to near the lower end of the partition walls. A building block;
A cross section having a substantially I-shaped cross section in which the partition and the top plate overhanging part forming a part of the top plate on both sides of the upper end of the partition and the bottom plate overhanging part forming a part of the bottom plate on both sides of the lower end of the partition The partition wall component building block,
A multiple box culvert is constructed by connecting the blocks and assembling them into a rectangular cylinder having a partition inside.   The multiple box culvert according to claim 1, wherein the multiple block culvert is formed by using one partition wall constituting block and forming a pair of internal spaces on both sides thereof.   The multiple box culvert according to claim 1, wherein a plurality of the plurality of partition wall constituent blocks are used, and a top plate is formed between the top plate overhang portions of the adjacent partition wall constituent blocks. A multiple box culvert in which an internal space is also formed between the partition walls using a block for blocks and a bottom plate block constituting a bottom plate between the bottom plate overhang portions of the partition wall constituting block.   The multiple box culvert according to claim 1, 2 or 3, wherein the connection between the blocks is hinged.

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