JP6591838B2 - Precast concrete structure and storage tank equipped with the precast concrete structure - Google Patents

Description

  The present invention relates to a precast concrete structure and a storage tank provided with the precast concrete structure.

  Conventionally, a concrete structure constructed at a construction site such as a civil engineering work is a site casting method in which a concrete is placed by placing a formwork on the site, or a concrete product manufactured in advance at a factory (hereinafter referred to as precast concrete). ) Is transported to the site and installed by a precast method.

  In particular, the precast method can build a high-quality concrete structure with homogeneous precast concrete and can shorten the work period compared to the on-site method that depends on the weather at the site. It has been implemented in various situations.

  Generally, the precast concrete is brought into the construction site by a transport vehicle such as a truck or a trailer.

  However, when the concrete structure to be constructed is large, the concrete structure to be constructed is carried into a subdivided state, that is, as a precast segment, due to the load limit of the transport vehicle, the restriction of traffic on public roads, and the like.

  The desired precast concrete structure is constructed by assembling the precast segments, which are successively brought into the construction site in such a divided state, while being coupled to each other.

  By the way, in many civil engineering construction sites, for example, an underground parking lot or an underground storage tank that temporarily stores a large amount of rain, a box-shaped concrete structure with an internal space An object (hereinafter also referred to as a box-type structure) may be constructed.

  Such a box-type structure is exactly a structure suitable for the precast method, and is constructed using precast segments such as a wall that forms the outer frame, an intermediate wall as a support, and a slab that functions as a ceiling. (For example, refer to Patent Document 1).

  More specifically, one or a plurality of intermediate wall bodies are erected between a pair of side wall bodies arranged apart from each other, and a slab body is erected between each side wall body or intermediate wall body to form a gate type. Form a structure that is continuous in the left-right direction, and a box-shaped precast concrete structure having a space in the interior is constructed by connecting a plurality of continuous gate-type structures densely in the front-rear direction.

Japanese Patent Application Laid-Open No. 07-090913

  However, the conventional precast concrete structure has a sufficient weight in the slab, and since there is earth pressure in the underground structure, the bond strength between the intermediate wall and the slab is mainly Not much attention has been given to the ease of construction.

  In this regard, the present inventors have intensively studied to provide a box-shaped precast concrete structure having a stronger structure in Japan, which has many earthquakes.

  That is, the present invention has been made in view of such circumstances, and an object thereof is to provide a precast concrete structure in which the intermediate wall and the slab are firmly integrated while being relatively easy to construct. And

  In order to solve the above-described conventional problems, in the precast concrete structure according to the present invention, (1) a pair of side wall bodies arranged apart from each other, and one or a plurality of intermediate walls standing between the side wall bodies Body and a slab body erected between each side wall or intermediate wall body has a structure that is continuous in the left-right direction. In the concrete structure made of precast concrete, the slab body is provided with loop streaks projecting in an arch shape across the vertical direction on both left and right end surfaces, and the intermediate wall body straddles the upper surface on the left and right direction. And the upper part of the intermediate wall body is composed of a loop line of the slab body protruding from the left and right directions and a loop line of the intermediate wall body protruding from below. Horn A loop reinforcement tunnel is formed by overlapping the loop reinforcement in the front-rear direction to form a loop reinforcement tunnel, and a plurality of reinforcing bars are arranged on the inner periphery along the extending direction of the loop reinforcement tunnel. It was decided to cast concrete to embed the muscle tunnel.

  In the precast concrete structure according to the present invention, (2) the side wall body is provided with loop streaks protruding in an arch shape on the upper surface thereof in the left-right direction, and the upper portion of the side wall body is A loop reinforcement tunnel is formed by arranging two loop reinforcements of a slab body protruding from one side and a loop reinforcement of the side wall body protruding from below in a twisted positional relationship while overlapping in the front-rear direction. In addition, a plurality of reinforcing bars are arranged on the inner periphery along the extending direction of the loop reinforcement tunnel portion, and the concrete is also formed by placing concrete so as to embed the loop reinforcement tunnel portion.

Further, the reservoir according to the present invention, (3) above (1) or a reservoir formed by buried in the ground the Purekyasu Toco Nkurito made structure according to (2), the ground in the internal space of the reservoir And a drainage hole to which an outflow pipe for discharging rainwater stored in the internal space of the storage part is connected.

  The storage tank according to the present invention is also characterized in that a gap having a width of 60 cm or more is formed between the body portions of the intermediate wall bodies adjacent in the front-rear direction.

  In the precast concrete structure according to the present invention, a pair of side wall bodies arranged apart from each other, one or a plurality of intermediate wall bodies erected between the side wall bodies, and between each side wall body or intermediate wall body In a concrete structure made of precast concrete having a structure in which a gate type including a slab body constructed in each direction is continuous in the left-right direction, and a plurality of the continuous gate-type structures are closely connected in the front-rear direction, the slab body Is provided with loop streaks projecting in an arch shape across the vertical direction on both left and right end surfaces, and the intermediate wall body is provided with loop streaks projecting in an arch shape across the left and right directions on the upper surface thereof. The upper part of the intermediate wall body is twisted while superimposing three loop bars of the slab body protruding from the left and right directions and the loop bars of the intermediate wall body protruding from below in the front-rear direction. Arranged in a positional relationship to form a loop reinforcement tunnel part, arranging multiple reinforcing bars on the inner periphery along the extension direction of the loop reinforcement tunnel part, and placing concrete to embed the loop reinforcement tunnel part Therefore, it is possible to provide a precast concrete structure in which the intermediate wall body and the slab are firmly integrated while being relatively easy to construct.

  Further, the side wall body is provided with loop streaks projecting in an arch shape in the left-right direction on the upper surface, and an upper portion of the side wall body includes a loop streak of a slab body projecting from either the left or right side and a lower side. A loop muscle tunnel portion is formed by superimposing two loop muscles of the side wall body projecting from the side wall body in a torsional position while overlapping in the front-rear direction, and is formed along the extending direction of the loop muscle tunnel portion. A structure made of precast concrete in which a plurality of reinforcing bars are arranged around the periphery and concrete is placed so as to embed the loop reinforcing bar tunnel portion, and almost the entire structure is integrated extremely firmly. It can be.

Further, a reservoir formed by burying the Purekyasu Toco Nkurito made structures in the ground, water guide hole inflow pipe is connected for guiding the ground rainwater in the internal space of the reservoir, the internal space of the reservoir If the storage tank is provided with a drainage hole to which the outflow pipe for discharging the stored rainwater is connected, the construction of the storage wall is relatively easy, but the intermediate wall and the slab are firmly integrated, and the earthquake A more robust storage tank can be provided.

  In addition, if a gap of 60 cm or more in width is formed between the body portions of the intermediate wall bodies adjacent in the front-rear direction, the dust remaining on the interior space floor after discharging the stored rainwater, etc., will be removed from the specified construction equipment. Etc. can be easily cleaned.

It is explanatory drawing which showed the structure of the underground storage facility. It is explanatory drawing which showed the structure of the storage tank which concerns on this embodiment. It is explanatory drawing which shows the structure of the loop reinforcement formed in the intermediate wall body and the slab body. It is explanatory drawing which shows the state which constructed the slab body on the intermediate wall body. It is explanatory drawing which showed the structure of the T-shaped junction part. It is explanatory drawing which showed the structure of the T-shaped junction part. It is explanatory drawing which shows the structure of the loop reinforcement formed in the side wall body and the slab body. It is explanatory drawing which showed the structure of the L-shaped junction part. It is explanatory drawing which showed the structure of the L-shaped junction part.

  The present invention provides a precast concrete structure in which an intermediate wall body and a slab are firmly integrated while being relatively easy to construct. Specifically, a pair of structures disposed separately from each other is provided. A gate type comprising a side wall body, one or a plurality of intermediate wall bodies erected between the side wall bodies, and a slab body erected between the side wall bodies or the intermediate wall bodies. The present invention relates to a concrete structure made of precast concrete in which a plurality of the continuous gate-type structures are closely connected in the front-rear direction.

  Here, the concrete structure is a structure in which a continuous gate-type structure constructed by side walls, intermediate walls, slabs, etc. is closely connected in the front-rear direction, for example, a box-type structure, its use, etc. Is not particularly limited, and may be used as, for example, a parking facility, a rainwater storage facility, a warehouse facility, or an evacuation facility.

  The concrete structure may be constructed on the ground, or may be constructed or buried underground. The case buried underground can be understood as, for example, an underground parking garage, a storage tank, an underground warehouse, an underground shelter, or the like in light of the above example.

  In such a concrete structure, as a feature of the precast concrete structure according to the present embodiment, the slab body is provided with loop streaks projecting in an arch shape across the vertical direction on both left and right end surfaces, The intermediate wall body is provided with loop streaks projecting in an arch shape in the left-right direction on the upper surface thereof, and the upper part of the intermediate wall body includes a loop streak of the slab body projecting from the left and right directions, and a lower part A loop muscle tunnel portion is formed by superimposing three loop muscles with the loop muscle of the intermediate wall body protruding from the front and rear direction in a twisted positional relationship, and along the extending direction of the loop muscle tunnel portion A plurality of reinforcing bars are arranged on the inner periphery, and concrete is cast so as to embed the loop reinforcing tunnel portion.

  Therefore, compared with the case where the slab is simply placed on the standing side wall body or intermediate wall body (hereinafter also collectively referred to as each wall body) or connected by pin coupling, it is stronger. Each wall body and the slab can be integrally coupled.

  For example, as shown in Japanese Patent No. 3854964, it has been conventionally proposed to use a PC steel material for the connection between the intermediate wall body and the slab body to form a rigid structure, but a special construction machine such as a jack. Since it is necessary to tension the PC steel material using the, it takes time for construction, and it is also necessary to manage the tension work of the PC steel material.

  In addition, it is necessary to perform such work on all the rigid structure parts, and the construction period is prolonged and the construction cost increases, and in some cases, the possibility of an accident increases.

  On the other hand, according to the present invention, since it is configured as described above, a special construction machine is not required, and a rigid connection structure can be realized by placing a raw component in the joint portion in the same manner as the non-rigid structure portion. Compared to the case of using PC steel, construction work and time can be drastically reduced, and while avoiding the possibility of accidents associated with tension work, it is almost the same as the integration with PC steel. Can be obtained.

  Further, the side wall body is provided with loop streaks projecting in an arch shape in the left-right direction on the upper surface, and an upper portion of the side wall body includes a loop streak of a slab body projecting from either the left or right side and a lower side. A loop muscle tunnel portion is formed by superimposing two loop muscles of the side wall body projecting from the side wall body in a torsional position while overlapping in the front-rear direction, and is formed along the extending direction of the loop muscle tunnel portion. A plurality of reinforcing bars may be disposed around the periphery, and concrete may be cast so as to embed the loop reinforcing tunnel portion.

  By adopting such a configuration, not only the connection between the intermediate wall body and the slab but also the connection between the side wall body and the slab can be made extremely strong, and substantially the entire structure to be constructed is integrated. Can be robust.

  In addition, the precast concrete structure having such a structure can be used as a useful structure in any of the above-described various applications using a box-type structure, and in particular, a part of a storage tank. If so, it exhibits extremely high utility.

  Here, the storage tank is an underground facility for temporarily storing rainwater and avoiding a rapid inflow into a river when a considerable amount of rainfall occurs in a short time in an urban area, for example.

That is, in the reservoir according to the present embodiment, the reservoir formed by embedding a Purekyasu Toco Nkurito made structure according to the present embodiment described above into the ground, the inflow tube leading to ground rainwater in the internal space of the reservoir And a drainage hole to which an outflow pipe for discharging rainwater stored in the internal space of the storage part is connected.

  Therefore, according to the storage tank which concerns on this embodiment, the storage tank provided with the extremely high tolerance at the time of an earthquake can be provided.

  In the storage tank according to the present embodiment, a gap having a width of 60 cm or more, and more preferably a gap of 80 cm or more may be formed between the body portions of the intermediate wall bodies adjacent in the front-rear direction.

  By providing such a gap, in order to eliminate dust accumulated in the storage tank after drainage, it is possible to efficiently clean it using a narrow construction heavy machine fitted with a drainage board etc. It can be carried out. In particular, when the gap is 80 cm or more, the construction heavy equipment can be allowed to pass with sufficient margins on both the left and right sides, and the horizontal width of the earth removing plate attached to the construction heavy equipment can be further expanded.

  Hereinafter, the precast concrete structure and the storage tank according to the present embodiment will be described in more detail with reference to the drawings.

  Drawing 1 is an explanatory view showing the structure of underground storage equipment 10 provided with storage tank A concerning this embodiment. As shown in FIG. 1, the underground storage facility 10 is installed in the basement of a park P maintained in an urban area, temporarily stores a large amount of rainwater that has fallen on the ground, and the flood condition of the ground And a sudden increase in river water can be avoided.

  The underground storage facility 10 includes a storage tank A, an inflow pipe 12, and an outflow pipe 13.

  The storage tank A is a box-type structure as a precast concrete structure according to the present embodiment constructed on the foundation concrete 20, and includes a side wall 21, an intermediate wall 22, a top wall 23, an inflow hole 15, and the like. And a drain hole 16.

  The foundation concrete 20 is a part that functions as the foundation of the storage tank A, and the concrete is placed at the bottom of a hole formed by digging the ground at the time of construction with a predetermined width in the front-depth direction of the paper surface, that is, at least of the storage tank A. It is formed by placing it wider than the width.

  The side wall 21 is a wall constituting the left and right end surfaces of the storage tank A, and is composed of a pair of side walls 21 of a left side wall 21L disposed on the left side of the paper surface and a right side wall 21R disposed on the right side of the paper surface.

  An inflow hole 15 is formed in the upper part of the left side wall 21L. The inflow hole 15 is a hole for allowing rainwater to flow into the internal space of the storage tank A, to which the inflow pipe 12 is connected. The inflow pipe 12 is connected to, for example, a rainwater mass disposed on the ground or a rainwater pipe 14 buried in the ground as shown in FIG. It has the role of allowing rainwater to flow into the storage tank A.

  Further, a drain hole 16 is formed in the lower portion of the opposing right side wall 21R. The drain hole 16 is a hole for allowing rainwater stored in the internal space of the storage tank A to flow out, and is connected to the outflow pipe 13. The outflow pipe 13 is connected to, for example, a drain pipe that leads to a river, and can discharge rainwater in the storage tank A. In the present embodiment, the inflow hole 15 is provided on the left side wall 21L and the drainage hole 16 is provided on the right side wall 21R. However, the formation positions thereof are not particularly limited, and do not impair the respective roles. For example, the front wall and the rear wall 25b of the storage tank A can be used as the other positions where the position can be appropriately changed.

  The intermediate wall 22 is a wall erected between the pair of side walls 21. In the storage tank A according to the present embodiment, the three partition walls 18 are formed inside by providing the two intermediate walls 22a and 22b. is doing.

  The top wall 23 is a part constituting the ceiling portion of the storage tank A, and is configured by connecting a plurality of slab bodies 33. In addition, the code | symbol 24 in FIG. 1 is the filling concrete part laid in order to make the floor surface inside the storage tank A flush. Moreover, the depth direction edge part of the paper surface of the storage tank A and the front edge part of the paper surface are placed with concrete to construct a rear wall 25b (see FIG. 2) and a front wall (not shown), and the stored rainwater is stored. It is comprised so that it may not leak into the ground from the front-and-rear end surface of the tank A.

  FIG. 2 is an explanatory view showing the structure of the storage tank A in three dimensions. As shown in FIG. 2, the side wall 21 (the left side wall 21L and the right side wall 21R) has a side wall body 30 as a precast segment formed in a predetermined length front-rear width (hereinafter referred to as a unit front-rear width) in the front-rear direction ( A plurality of the storage tanks A are shown in a three-dimensional manner in FIG.

  The side wall body 30 includes a flat plate-like wall main body portion 30a extending in the vertical direction, an upper flange portion 30b formed at the upper portion of the wall main body portion 30a, and a lower flange portion 30c formed at the lower portion of the wall main body portion 30a. ing.

  The wall main body 30a is a part that functions as a wall for preventing rainwater from leaking outside when rainwater is stored in the storage tank A. In addition, although the description of the inflow hole 15 described above is omitted in FIG. 2, the inflow hole 15 is formed in a predetermined portion of the wall main body portion 30 a that is continuously provided in the front-rear direction.

  The upper flange portion 30b is a flange provided with an upper plane formed so as to protrude inward of the storage tank A, and the upper plane is a slab as a precast segment formed with the same unit front-rear width as the side wall body 30. The left and right end vicinity of the body 33 is placed and functions as a part for forming the L-shaped joint 40 that connects the side wall body 30 and the slab body 33.

  The lower flange portion 30c is a flange having a lower flat surface formed in a projecting shape toward the inside of the storage tank A, and is a portion for stably supporting the side wall body 30 itself on the foundation concrete 20.

  In addition, the intermediate wall 22 (intermediate wall 22a and intermediate wall 22b) has a plurality of intermediate wall bodies 31 as a precast segment formed in the same unit front-rear width as the above-mentioned side wall body 30 in the maximum front-rear direction in a dense and continuous manner in the front-rear direction. In addition, a gap 34 is formed to spatially connect the adjacent partition spaces 18 at predetermined intervals.

  The intermediate wall 31 includes a flat plate-shaped wall body portion 31a extending in the vertical direction, an upper flange portion 31b formed at the upper portion of the wall body portion 31a, and a lower flange portion 31c formed at the lower portion of the wall body portion 31a. I have.

  The wall body part 31a is a part that functions as a support for supporting the slab body 33 that is installed upward. The wall body portion 31a includes a cutout portion 31d. This notch portion 31d is formed by cutting out either one of the front and rear end surfaces of the wall body portion 31a from the vicinity of the upper flange portion 31b to the upper surface of the lower flange portion 31c so as to be narrower by 30 cm or more than the unit front and rear width. is doing. This notch part 31d is for forming the gap part 34 by abutting with the notch part 31d of the other intermediate wall body 31 either before or after the connection. That is, the gap width (width in the front-rear direction) of the gap portion 34 is configured to be 60 cm or more. And by having such a structure, by carrying in construction heavy machinery etc. with a width of 60 cm or less equipped with a drainage board etc. in the storage tank A, for example, it flows in with rainwater and remains in the storage tank A after drainage. It is possible to efficiently remove dust and the like.

  The upper flange portion 31b is a flange provided with an upper flat surface that protrudes toward the left and right sides of the storage tank A. The upper flange portion 31b is placed near the left and right end portions of the slab body 33, and has an intermediate wall body 31 and two slabs. It functions as a part that forms a T-shaped joint 41 that connects the body 33.

  The lower flange portion 31c is a flange having a lower flat surface formed in a protruding shape toward the left and right sides of the storage tank A, and is a part for stably supporting the intermediate wall body 31 itself on the foundation concrete 20. .

  Next, the structure of the T-shaped joint 41 that is characteristic of the storage tank A that is a precast concrete structure according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 3, the T-shaped joint portion 41 is formed on the upper flange portion 31 b of the intermediate wall body 31 by the two slab bodies 33 and the intermediate wall body 31.

  The left and right ends of the slab body 33 are provided with arch-like slab body loop muscles 33a extending in the vertical direction so as to protrude in the lateral direction, and a plurality of the slab body loop muscles 33a are provided in the front-rear direction (this embodiment). Then, 6) are formed.

  Further, in the vicinity of the left and right end portions of the slab body 33, a plurality of pin insertion holes 33b penetrating the slab body 33 in the vertical direction are provided in parallel with the left and right end edges of the slab body 33 in the front-rear direction (4 in this embodiment). I) It is drilled.

  Further, an arch-shaped intermediate wall loop streak 31e extending in the left-right direction is provided so as to protrude upward at the center of the upper surface of the upper flange portion 31b of the intermediate wall 31. A plurality (six in this embodiment) are formed in the front-rear direction.

  Further, a positioning pin 31f formed of a reinforcing bar is protruded upward in the vicinity of the left and right end portions of the upper flange portion 31b. The positioning pin 31f is front and rear in parallel with the left and right end edges of the upper flange portion 31b. A plurality (four in this embodiment) are formed in the direction.

  The pin insertion holes 33b of the slab body 33 described above are formed at positions corresponding to the positioning pins 31f, and the slabs are respectively formed on the left and right sides of the upper flange portion 31b so that the positioning pins 31f are inserted into the pin insertion holes 33b. By disposing the end portion of the body 33, the front and rear end edges of the slab body 33 and the front and rear end edges of the upper flange portion 31b can be easily disposed.

  Here, in FIG. 3, the slab body loop streaks 33a of the slab body 33 (referred to as the first slab body S1 for convenience of description) disposed on the upper left end side of the upper flange portion 31b, and the upper flange portion 31b The slab body loop streaks 33a and the intermediate wall body loop streaks 31e of the slab body 33 (referred to as the second slab body S2 for convenience of description) disposed on the right upper end side of the upper surface are disposed at the prescribed positions described above. At this time, the loop lines are arranged so as not to interfere with each other.

  That is, as shown in FIG. 4, the slab body loop muscle 33a of the first slab body S1, the slab body loop muscle 33a of the second slab body S2, and the intermediate wall body loop muscle 31e of the intermediate wall body 31 are provided. Each of them is arranged in a twisted positional relationship so that the loop portions of the three loop muscles overlap in the front-rear direction.

  Further, as shown in FIG. 5, the loop loop tunnel portion 42 extending in the front-rear direction is formed by the three loop bars arranged in this way.

  As shown in FIGS. 5 and 6, a plurality of reinforcing bars 35 are provided in the inner periphery of the loop reinforcement tunnel portion 42 in the extending direction of the loop reinforcement tunnel portion 42, that is, in the front-rear direction (in this embodiment, 6. Book).

  And between the end portions of the two slab bodies 33 arranged on the upper flange portion 31b so as to embed the loop muscle tunnel portion 42 formed in this way (portion indicated by a broken line in FIGS. 5 and 6). The T-joint 41 is formed by placing concrete on the surface.

  Therefore, a rigid coupling structure in which the intermediate wall body and the slab are firmly integrated is realized while being relatively easy to construct.

  Next, the configuration of the L-shaped joint portion 40 will be described with reference to FIGS.

  As shown in FIG. 7, the L-shaped joint portion 40 is formed on the upper flange portion 30 b of the side wall body 30 by the slab body 33 and the side wall body 30. Here, the L-shaped joint portion 40 formed on the side wall body 30 constituting the left side wall 21L will be described as an example, but the L-shaped joint portion 40 on the right side wall 21R is bilaterally symmetric and substantially similar. Since it is a structure, description is abbreviate | omitted.

  As described above, the slab body 33 includes a plurality of arch-shaped slab body loop bars 33a extending in the vertical direction at the right end portion thereof, and penetrates the concrete molding portion of the slab body 33 in the vertical direction in the vicinity of the right end portion. A plurality of pin insertion holes 33b are formed.

  Further, on the right side of the upper surface of the upper flange portion 30b of the side wall body 30, an arch-shaped side wall body loop line 30d extending in the left-right direction is provided so as to protrude upward. In this embodiment, six) are formed.

  Further, a positioning pin 30e formed of a reinforcing bar is protruded upward in the vicinity of the upper left end portion of the upper flange portion 30b. The positioning pin 30e is parallel to the left and right end edges of the upper flange portion 30b in the front-rear direction. A plurality (four in this embodiment) are formed toward the head.

  The pin insertion hole 33b of the slab body 33 is formed at a position corresponding to the positioning pin 30e, and the slab body is formed on the left side of the upper flange portion 30b so that the positioning pin 30e is inserted into the pin insertion hole 33b. By arranging the end portions 33, the front and rear end edges of the slab body 33 and the front and rear end edges of the upper flange portion 30b can be easily arranged at a specified position.

  Further, when the slab body loop streaks 33a and the side wall body loop streaks 30d of the slab body 33 disposed on the upper surface of the upper flange portion 30b are arranged at the above-mentioned prescribed positions, the loop streaks do not interfere with each other. Has been placed.

  That is, as shown in FIG. 9, the slab body loop line 33a of the slab body 33 and the side wall body loop line 30d of the side wall body 30 are arranged in a twisted positional relationship, and the loop portions of the two loop lines are in the front-rear direction. It is made to superimpose alternately toward.

  Moreover, as shown in FIG. 8, the loop line tunnel part 43 extended in the front-back direction is formed by the two loop lines arranged in this way.

  As shown in FIGS. 8 and 9, a plurality of reinforcing bars 35 are provided in the inner periphery of the loop reinforcement tunnel portion 43 in the extending direction of the loop reinforcement tunnel portion 43, that is, in the front-rear direction (in this embodiment, 6). Book).

  Then, in order to embed the loop muscle tunnel portion 43 formed in this way, a portion indicated by a broken line in FIGS. 8 and 9 is cast with concrete to form an L-shaped joint portion 40.

  Therefore, while the construction is relatively easy, a rigid coupling structure in which the side wall body 30 and the slab body 33 are firmly integrated is realized.

  In particular, in the storage tank A that is a precast concrete structure according to the present embodiment, since both the L-shaped joint portion 40 and the T-shaped joint portion 41 are provided, almost the entire structure is integrated extremely firmly. A precast concrete structure is realized.

  As described above, according to the precast concrete structure according to the present embodiment, a pair of side wall bodies (for example, the side wall body 30) that are arranged apart from each other, and one or a plurality of standing side walls disposed between the side wall bodies. The intermediate wall body (for example, the intermediate wall body 31) and the slab body (for example, the slab body 33) respectively erected between the side wall bodies or the intermediate wall body have a structure in which the gate shape is continuous in the left-right direction. In the concrete structure made of precast concrete in which a plurality of the continuous gate-type structures are closely connected in the front-rear direction, the slab body has loop bars projecting in an arch shape on both left and right end surfaces. (For example, a slab body loop line 33a), and the intermediate wall body has a loop line (for example, an intermediate wall line loop line 31e) projecting in an arch shape on the upper surface thereof in the left-right direction. The upper part of the intermediate wall body is twisted while superimposing three loop bars of the loop bars of the slab body protruding from the left and right directions and the loop bars of the intermediate wall body protruding from below in the front-rear direction. The loop reinforcement tunnel portion (for example, the loop reinforcement tunnel portion 42) is formed in the positional relationship, and a plurality of reinforcement bars (for example, the reinforcement 35) are arranged on the inner periphery along the extending direction of the loop reinforcement tunnel portion. At the same time, since the concrete is placed so as to embed the loop reinforcement tunnel portion (for example, the T-shaped joint portion 41), the intermediate wall body and the slab are firmly formed while the construction is relatively easy. An integrated precast concrete structure can be provided.

  Finally, the description of each embodiment described above is an example of the present invention, and the present invention is not limited to the above-described embodiment. For this reason, it is a matter of course that various modifications can be made in accordance with the design and the like as long as they do not depart from the technical idea according to the present invention other than the embodiments described above.

DESCRIPTION OF SYMBOLS 10 Underground storage equipment 12 Inflow pipe 13 Outflow pipe 15 Water conveyance hole 16 Drainage hole 18 Partition space 21 Side wall 22 Intermediate wall 23 Top wall 30 Side wall body 30d Side wall body loop line 31 Intermediate wall body 31e Intermediate wall body loop line 33 Slab body 33a Slab Body loop muscle 34 Gap 35 Reinforcement 40 L-shaped joint 41 T-shaped joint 42 Loop loop tunnel 43 Loop loop tunnel A Reservoir

Claims (4)

A portal type comprising a pair of side wall bodies arranged apart from each other, one or a plurality of intermediate wall bodies erected between the side wall bodies, and a slab body respectively erected between the side wall bodies or the intermediate wall bodies In a concrete structure made of precast concrete having a structure that is continuous in the left-right direction, and a plurality of this continuous gate-type structure connected in a dense manner in the front-rear direction,
The slab body is provided with loop streaks projecting in an arch shape across the vertical direction on both left and right end surfaces, and the intermediate wall body is provided with loop streaks projecting in an arch shape across the left and right direction on the upper surface. Is,
The upper portion of the intermediate wall body is a positional relationship of torsion while superimposing three loop bars of the loop bars of the slab body protruding from the left and right directions and the loop bars of the intermediate wall body protruding from below in the front-rear direction. To form a loop reinforcement tunnel portion, arrange a plurality of reinforcing bars on the inner periphery along the extending direction of the loop reinforcement tunnel portion, and cast concrete to embed the loop reinforcement tunnel portion A precast concrete structure characterized by comprising: The side wall body is provided with loop streaks projecting in an arch shape across the left and right direction on the upper surface,
The upper part of the side wall body is arranged in a twisted positional relationship with two loop bars of a slab body protruding from either the left or right side and a loop bar of the side wall body protruding from the lower side overlapping in the front-rear direction. The loop reinforcement tunnel portion is formed, and a plurality of reinforcing bars are arranged on the inner periphery along the extending direction of the loop reinforcement tunnel portion, and the concrete is placed so as to embed the loop reinforcement tunnel portion. The precast concrete structure according to claim 1. A reservoir formed by buried in the ground the Purekyasu Toco Nkurito made structure according to claim 1 or claim 2,
A water introduction hole to which an inflow pipe for guiding ground rain water to the internal space of the storage unit is connected;
A drainage hole to which an outflow pipe for discharging rainwater stored in the internal space of the storage unit is connected;
A storage tank with   The storage tank according to claim 3, wherein a gap having a width of 60 cm or more is formed between the body portions of the intermediate wall bodies adjacent in the front-rear direction.

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