JP2017223047A - Culvert wall structure, and construction method of culvert wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a culvert wall structure and a construction method of a culvert wall that reduce labor and curtail a work period when constructing a box culvert.SOLUTION: A precast concrete member 5A includes a pair of outer plate parts 2, 2, that is, a first outer plate part 21 on a side including first precast concrete panels 23, 23, ... arranged in a lengthwise direction intersecting with a thickness direction, and a second plate part 22 on the other side including second precast concrete panels 24, 24, ... arranged in the lengthwise direction. The first precast concrete panel 23 and the second precast concrete panel 24 are disposed leaving an interval in the thickness direction, and are connected by a connection member 4A. The precast concrete member 5A is formed with an inner concrete part formation hollow part 51 where an inner concrete part 3A is formed between the first precast concrete panel 23 and the second precast concrete panel 24 that face each other.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a culvert wall structure and a culvert wall construction method.

Conventionally, as a standard tunnel construction method, there is known a method of constructing a culvert such as a box culvert by assembling a reinforcing bar and a formwork at a site and placing concrete in the formwork. Such a method has a proven track record and is highly reliable. However, it takes time and work to assemble the reinforcing bars and formwork and the support work for the top plate bottom frame.
Therefore, a method of precasting members constituting the culvert is known in order to reduce work on site (see, for example, Patent Document 1).

JP-A-4-293830

  When the structure constructed by culvert is large, each member such as bottom plate, top plate, and side wall becomes large, so when trying to precast each member, the weight per member from the viewpoint of production and transportation However, it is difficult to manufacture a member having a desired size. For this reason, even if the members constituting the culvert are precast, there is a problem that the effect of reducing the labor and time required for assembly in the field is small.

  Therefore, an object of the present invention is to provide a culvert wall structure and a culvert wall construction method capable of reducing labor and construction time when constructing a culvert.

  In order to achieve the above object, a wall structure of a culvert according to the present invention includes a pair of outer plate portions arranged to face both sides in the thickness direction, and an inner concrete filled between the pair of outer plate portions. A pair of outer plate portions, each having a precast concrete panel arranged in a length direction intersecting the thickness direction, and the pair of outer plate portions The precast concrete panel of one of the outer plate portions and the precast concrete panel of the other outer plate portion facing the precast concrete panel in the thickness direction are arranged with a gap in the thickness direction. A precast concrete member connected by a connecting member, and the precast concrete member is disposed between the precast concrete panels facing each other. Wherein the inner concrete portion forming an empty portion inner concrete portion is formed is formed.

  Further, in the culvert wall construction method according to the present invention, a pair of outer plate portions disposed opposite to both sides in the thickness direction, and an inner concrete portion filled between the pair of outer plate portions, Each of the pair of outer plate portions includes precast concrete panels arranged in a length direction intersecting with the thickness direction, and the precast of one outer plate portion of the pair of outer plate portions. The concrete panel and the precast concrete panel on the other outer plate facing the precast concrete panel in the thickness direction are precast concrete members arranged with a gap in the thickness direction and connected by a connecting member. The precast concrete member includes an inner concrete portion in which the inner concrete portion is formed between the opposed precast concrete panels. In the method for constructing a wall of a culvert in which a space for forming a riet portion is formed, the precast concrete member manufacturing step for manufacturing the precast concrete member, and the precast concrete panels in which the connecting members connect the precast concrete members are the thicknesses. A precast concrete member installation step arranged in the length direction in a direction opposite to the length direction, and the concrete of the inner concrete portion in each of the inner concrete portion forming voids of the precast concrete members arranged in the length direction. And a concrete filling step of filling together.

In the present invention, in the precast concrete member, an inner concrete portion forming void is formed between the opposed precast concrete panels. For this reason, in this invention, the weight of a precast concrete member can be made light compared with the case where the solid precast concrete member in which the empty part is not formed in the side wall of a culvert is arranged and constructed. Thereby, in this invention, a precast concrete member can be enlarged compared with the solid precast concrete member of the same weight.
As a result, the quantity of precast concrete members can be reduced, and the labor and construction period when constructing a culvert can be reduced.

In the culvert wall structure according to the present invention, the connecting member may be a steel plate that is joined to each of the opposed precast concrete panels and arranged in a direction intersecting with each of the opposed precast concrete panels.
By setting it as such a structure, the shear force which a steel plate acts on a precast concrete member can be borne.

In the culvert wall structure according to the present invention, it is preferable that a plurality of holes are formed in the steel plate.
By adopting such a configuration, the concrete before hardening of the inner concrete portion filled in the inner concrete portion forming void flows into one side and the other side of the steel plate through the holes formed in the steel plate. Therefore, it is possible to reliably fill the inner concrete part forming space with the concrete of the inner concrete part.

In the culvert wall structure according to the present invention, the connecting member may be configured to bear a shearing force acting on the precast concrete panel and the inner concrete portion.
By setting it as such a structure, the yield strength of a wall structure can be improved.

Moreover, in the wall structure of the culvert according to the present invention, the precast concrete panel is provided with a displacement preventing member capable of supporting the reinforcing bar of the inner concrete portion and integrating the precast concrete panel and the inner concrete portion. It is preferable that it is characterized.
By setting it as such a structure, the inside concrete part can be easily arranged using the slip prevention member which integrates a precast concrete panel and an inner concrete part.

In the wall structure of the culvert according to the present invention, the precast concrete panel may be provided with reinforcing bars of the inner concrete portion.
By setting it as such a structure, reinforcement of an inner concrete part can be performed easily.

Further, the culvert wall structure according to the present invention has a water stop portion provided between the precast concrete panels adjacent in the length direction, and the water stop portion is adjacent to the length direction in the precast concrete. A bolt formed in the notch formed so as to communicate with each opposite end of the panel and projecting from the surface of the notch into the precast concrete panel; A non-shrink mortar filled between the notch portion and an anti-seismic water stop plate disposed inside the notch portion, and the surface of the notch portion and the anti-seismic water plate, It is good also as a structure by which the unevenness | corrugation is formed in the surface.
By adopting such a configuration, the non-shrinking mortar is fixed to the unevenness of the surface of the notch and the bolt protruding from the surface of the notch. It can prevent and can improve water-stopping property.

Further, the culvert wall structure according to the present invention has a water stop portion provided between the precast concrete panels adjacent in the length direction, and the water stop portion is adjacent to the length direction in the precast concrete. A bolt formed in the notch formed so as to communicate with each opposite end of the panel and projecting from the surface of the notch into the precast concrete panel; An anti-seismic water stop plate disposed inside the notch, and fiber concrete filled between the surface of the notch and the anti-seismic water plate, and the surface of the notch It is good also as a structure by which the unevenness | corrugation is formed.
By adopting such a configuration, the fiber concrete is fixed to the unevenness of the surface of the notch and the bolt protruding from the surface of the notch, so that the fiber concrete can be prevented from peeling from the notch during an earthquake. , Can increase the water-stopping property.

In the culvert wall construction method according to the present invention, in the precast concrete member manufacturing step, the reinforcing bars of the inner concrete portion may be joined to the precast concrete panel.
By setting it as such a structure, reinforcement of an inner concrete part can be performed easily.

  According to the present invention, it is possible to reduce labor and construction time when constructing a culvert.

It is a figure which shows an example of the box culvert by 1st Embodiment of this invention, and is AA sectional view taken on the line of FIG. It is a side view which shows an example of the box culvert by 1st Embodiment of this invention. It is the BB sectional view taken on the line of FIG. It is the figure which looked at the 1st precast concrete panel by a 1st embodiment of the present invention from the inner concrete part side. It is the figure which looked at the 1st precast concrete panel by 1st Embodiment of this invention from the length direction. It is the figure which looked at the 2nd precast concrete panel by a 1st embodiment of the present invention from the length direction. It is the figure which looked at the 1st precast concrete panel by a 1st embodiment of the present invention from the upper part. It is the figure which looked at the 1st precast concrete panel by a 1st embodiment of the present invention from the lower part. It is a figure explaining the junction part of the 1st precast concrete panel and bottom slab by 1st Embodiment of this invention. It is a figure explaining a height adjustment member. It is CC sectional view taken on the line of FIG. It is a figure explaining the water stop part. It is a figure explaining the wall structure of the culvert by 2nd Embodiment of this invention. It is the figure which looked at the 1st precast concrete panel by 2nd Embodiment of this invention from the internal concrete part side. It is the figure which looked at the 1st precast concrete panel by 2nd Embodiment of this invention from the length direction. It is the figure which looked at the 2nd precast concrete panel by 2nd Embodiment of this invention from the length direction. It is the figure which looked at the connection member from the upper part in the figure explaining a connection member. It is the DD sectional view taken on the line of FIG. It is a figure explaining the modification of the wall structure of the culvert by embodiment of this invention. It is a figure explaining the E section of FIG.

(First embodiment)
A culvert wall structure and a culvert wall construction method according to an embodiment of the present invention will be described below with reference to FIGS.
As shown in FIGS. 1 and 2, a box culvert (culvert) 1 according to the present embodiment is connected to a bottom plate 11, a pair of side walls 12A and 12A erected from the bottom plate 11, and an upper portion of the pair of side walls 12A and 12A. And a top plate 13. In the present embodiment, the box culvert 1 is formed along the inclined surface 14 (see FIG. 2).
In this embodiment, the structure of the side wall 12A of the box culvert 1 corresponds to the wall structure of the culvert of the present invention, and the method of constructing the side wall 12A of the box culvert 1 corresponds to the method of constructing the culvert wall of the present invention. .
The bottom slab 11 has a reinforced concrete structure and is constructed by a publicly known construction method on site. The bottom plate 11 is provided with side wall joining rebars 111, 111 (see FIG. 9) that protrude from the top surface of the bottom plate 11 and are joined to the side wall 12A.

  The side wall 12A includes a pair of outer plate portions 2 and 2 having a reinforced concrete structure disposed on both sides in the thickness direction of the side wall 12A, and an inner concrete portion 3A having a reinforced concrete structure filled between the pair of outer plate portions 2 and 2. And have. A direction perpendicular to the plate surface of the side wall 12A is defined as a thickness direction (see FIG. 1), and a direction in which the side wall 12A extends is defined as a length direction (see FIG. 2).

  As shown in FIG. 3, when one of the pair of outer plate portions 2 and 2 is a first outer plate portion 21 and the other is a second outer plate portion 22, the first outer plate portion 21 extends in the length direction. The second outer plate portion 22 is composed of a plurality of second precast concrete panels 24, 24... Arranged in the length direction. The first precast concrete panels 23, 23 ... and the second precast concrete panels 24, 24 ... are separated in the thickness direction, and the first precast concrete panels 23, 23 ..., and the second precast concrete panels 24, 24, The inner concrete part 3A is formed between 24. In addition, in FIG. 3, the display of the concrete part and vertical stripe of 3 A of inner side concrete parts is abbreviate | omitted.

  The plurality of first precast concrete panels 23, 23,... Are connected to the second precast concrete panels 24, 24,. The first precast concrete panel 23 and the second precast concrete panel 24 that face each other in the thickness direction and the connecting member 4A that connects them constitute a precast concrete member 5A.

The precast concrete member 5A is manufactured in a factory or the like, and is arranged in the length direction when the side wall 12A is constructed. The precast concrete members 5A, 5A,. An inner concrete portion 3 </ b> A is formed in a space between the panel 24.
An empty space between the first precast concrete panel 23 and the second precast concrete panel 24 of the precast concrete member 5 </ b> A is defined as an inner concrete portion forming empty space 51.
In the present embodiment, the five precast concrete members 5A, 5A,... Arranged in the length direction become one unit 52, and the units 52 are arranged in the length direction.

  The first precast concrete panel 23 and the second precast concrete panel 24 are manufactured so that reinforcing bars (longitudinal bars 25a and horizontal bars 25b) are arranged therein and have a predetermined strength and size.

The first precast concrete panel 23 and the second precast concrete panel 24 can support the horizontal bars 31 (see FIG. 3) of the inner concrete portion 3A, and each of the first precast concrete panel 23 and the second precast concrete panel 23 Displacement preventing members 6, 6... For integrating the inner concrete portion 3A are joined together.
As shown in FIGS. 3 to 7, the slip prevention member 6 is a long steel plate whose plate surface faces the length direction and extends over substantially the entire height direction of the first precast concrete panel 23. It protrudes from the inner surface of the precast concrete panel 23 (the side on which the inner concrete portion 3A is formed). In the present embodiment, five slip prevention members 6 are provided at intervals in the length direction with respect to one first precast concrete panel 23.
A plurality of rebar insertion holes 61, 61... (See FIGS. 5 and 6) through which the transverse bars 31 of the inner concrete portion 3A are inserted are formed in the slip prevention member 6. Reinforcing bar insertion holes 61, 61... Are formed in the detent member 6 at substantially the same interval as the pitch in the height direction of the horizontal bars 31 of the inner concrete part 3A.

The second precast concrete panel 24 is also provided with a slip prevention member 6 in the same manner as the first precast concrete panel 23. It is assumed that the second precast concrete panel 24 has the configuration of the first precast concrete panel 23 described below.
In the first precast concrete panel 23, the upper side of the vertical bars 25 a protrudes above the upper surface of the concrete portion 28. The upper side of the vertical bars 25a is embedded in the concrete portion 131 (see FIGS. 1 and 2) of the top plate 13.

As shown in FIG. 8 and FIG. 9, a plurality of reinforcing bar insertion recesses into which the side wall joining rebars 111, 111... Are formed at intervals in the length direction. On the upper side of each of the reinforcing bar insertion recesses 26, 26..., The lower side of the vertical bars 25 a of the first precast concrete panel 23 is arranged. A gap is formed between the lower side surface of the vertical bar 25 a and the reinforcing bar insertion recess 26.
The side wall joining rebars 111, 111... Of the bottom plate 11 are arranged coaxially with the vertical rebar 25a of the first precast concrete panel 23 when inserted into the rebar insertion recesses 26, 26. A gap is formed between the side surface of the side wall bonded reinforcing bar 111 inserted into the reinforcing bar insertion recess 26 and the reinforcing bar insertion recess 26.

  The reinforcing bar insertion recess 26 is configured such that a grout material such as mortar is filled therein with the side wall bonded reinforcing bar 111 inserted. At this time, the clearance between the lower side surface of the vertical bar 25a of the first precast concrete panel 23 and the reinforcing bar insertion recess 26, and the clearance between the side surface of the side wall bonded reinforcing bar 111 inserted into the reinforcing bar insertion recess 26 and the reinforcing bar insertion recess 26 Is filled with grout material. When the grout material filled in the reinforcing bar insertion recess 26 is hardened, the side wall joining reinforcing bar 111 and the vertical bar 25a of the first precast concrete panel 23 are joined, and the bottom plate 11 and the side wall 12A are joined.

  As shown in FIG. 10, a height adjustment insert 7 for adjusting the height of the precast concrete member 5 </ b> A with respect to the bottom slab 11 is provided at the lower end portion of the first precast concrete panel 23. The height adjustment of the precast concrete member 5 </ b> A with respect to the bottom plate 11 can be performed by adjusting the amount by which the height adjustment screw 71 provided on the bottom plate 11 is screwed to the height adjustment insert 7.

As shown in FIGS. 3 and 11, the connecting member 4 </ b> A is a long steel plate extending substantially in the height direction of the first precast concrete panel 23 and the second precast concrete panel 24, and the plate surface is long. It is arranged to face the direction.
The connecting member 4A is joined by welding, bolts, or the like in the vicinity of the tip of the displacement preventing member 6 whose end on the first precast concrete panel 23 side is joined to the first precast concrete panel 23, and is connected to the second precast concrete panel 24 side. Are joined by welding, bolts, or the like in the vicinity of the tip of the displacement preventing member 6 protruding from the second precast concrete panel 24. As described above, the connecting member 4 </ b> A connects the first precast concrete panel 23 and the second precast concrete panel 24 via the displacement preventing members 6 and 6.
The connecting member 4 </ b> A is joined to the stopper member 6 so as not to block the reinforcing bar insertion holes 61, 61... Of the stopper member 6.

In the present embodiment, two connecting members 4A are provided at intervals in the length direction with respect to one first precast concrete panel 23 and one second precast concrete panel 24 facing each other. For this reason, the connecting member 4A is not joined to all of the stopper members 6, 6,..., But the stopper member 6 to which the connecting member 4A is joined and the connecting member 4A are not joined. And are provided.
The connecting member 4A is provided with a plurality of concrete material distribution holes (holes) 41, 41,... That can be distributed in a state where the concrete material of the inner concrete part 3A is not hardened, with an interval in the height direction. Yes.

As shown in FIGS. 3 and 12, in the present embodiment, the water stop portion 8 is provided between the first precast concrete panels 23 and 23 adjacent in the length direction at the boundary portion between the units 52 and 52 adjacent in the length direction. Is formed.
The first precast concrete panels 23, 23 adjacent to each other in the length direction have notches 231, which are open on the side facing each other and the side not facing the second precast concrete panel 24, on the end faces facing each other in the length direction. 231 are formed. The notches 231 and 231 of the first precast concrete panels 23 and 23 adjacent to each other in the length direction are in communication with each other, and the two notches 231 and 231 are combined to form a water stop recess 81. Yes.
The water stop recess 81 has a rough surface and is formed in a concavo-convex shape by a convex portion 81a formed on the surface, and the head side of the dowel bolt 82 provided on the first precast concrete panels 23 and 23 protrudes from the surface. ing.
Inside the water stop recess 81, a flexible earthquake resistant water plate 83 made of rubber or the like and having flexibility is disposed, and there is no space between the earthquake resistant water plate 83 and the surface of the water stop recess 81. A shrink mortar 84 is filled.
The water stop portion 8 is formed by the earthquake resistant water stop plate 83, the non-shrink mortar 84 and the divel bolt 82 provided in the water stop recess 81.

As shown in FIG. 3, the inner concrete portion 3 </ b> A has a reinforced concrete structure, and a predetermined number of vertical bars (not shown) and horizontal bars 31 are embedded in the concrete portion. As for the vertical bars (not shown) of the inner concrete portion 3A, the upper side protrudes above the upper surface of the concrete portion. The upper side of the vertical bars of the inner concrete portion 3A is configured to be embedded in the concrete portion 131 (see FIG. 1) of the top plate 13.
The inner concrete portion 3 is integrally formed in the entire interior of the plurality of precast concrete members 5A, 5A,.
In the present embodiment, the inner concrete portion 3A is provided with a plurality of unbonded steel bars 33, 33... Extending in the length direction so as to extend over the precast concrete members 5A, 5A of the adjacent units 52 at intervals in the height direction. It has been. In the region where the unbonded steel rods 33, 33 are arranged, a hole through which the unbonded steel rods 33, 33 are inserted is formed in the connecting member 4A. Moreover, in this embodiment, the horizontal bar | burr 31 is not divided | segmented in the position which overlaps with the unbonded steel bars 33 and 33 in the thickness direction, but is arrange | positioned so that it may continue. The transverse bars 31 may be divided at positions that overlap the unbonded steel bars 33, 33 in the thickness direction.

  The top plate 13 has a reinforced concrete structure and is constructed by a publicly known construction method on site. In the present embodiment, an embedded mold 132 (see FIG. 1) is used for the lower frame of the top plate 13. In the top plate 13, the upper side of the vertical bars 25a of the first precast concrete panel 23, the second precast concrete panel 24 and the inner concrete portion 3A of the side wall 12A is embedded.

Next, the construction method of the side wall 12A of the box culvert 1 will be described.
First, the precast concrete member 5A is manufactured (precast concrete member manufacturing process).
The first precast concrete panel 23 and the second precast concrete panel 24 are manufactured. At this stage, the first precast concrete panel 23 and the second precast concrete panel 24 are provided with the displacement preventing members 6, 6.
The first precast concrete panel 23 and the second precast concrete panel 24 are arranged to face each other at an interval in the thickness direction, and the connection members 4A are welded or bolted to the displacement preventing members 6 and 6, and the first connection member 4A The precast concrete panel 23 and the second precast concrete panel 24 are connected. Thereby, the precast concrete member 5A is manufactured.
In the present embodiment, the precast concrete member manufacturing process is performed in a factory or the like, and the manufactured precast concrete member 5A is carried into the site.

Subsequently, the precast concrete member 5A is installed on the bottom plate 11 (precast concrete member installation step). In addition, the bottom plate 11 shall be constructed | assembled by the well-known method in the field before the precast concrete member installation process.
The precast concrete members 5A are arranged on the bottom plate 11 in the length direction. At this time, the side wall joining rebars 111, 111... Of the bottom plate 11 are inserted into the rebar insertion recesses 26, 26... Of the first precast concrete panel 23 and the second precast concrete panel 24.
Further, the height of the precast concrete member 5A with respect to the bottom plate 11 is adjusted. The bottom plate 11 is adjusted by adjusting the amount by which the height adjusting screw 71 provided on the bottom plate 11 is screwed to the height adjusting insert 7 provided on the lower ends of the first precast concrete panel 23 and the second precast concrete panel 24. The height of the precast concrete member 5A is adjusted.

  The gap between the adjacent first precast concrete panels 23, 23, the gap between the adjacent second precast concrete panels 24, 24, the gap between the first precast concrete panel 23 and the bottom slab 11, and the second precast concrete panel 24 and the bottom slab 11 Caulking is performed by filling the gap with mortar.

Moreover, the water stop part 8 is formed between the 1st precast concrete panels 23 and 23 adjacent to a length direction in the boundary part of the units 52 and 52 adjacent to a length direction.
The formation of the notches 231, 231 of the first precast concrete panels 23, 23 adjacent to each other in the length direction and the installation of the dowel bolts 82, 82. This is performed when the panels 23 and 23 are manufactured.
An anti-seismic water plate 83 is disposed in a water-stop concave portion 81 formed by combining the notches 231 and 231 of the first precast concrete panels 23 and 23 adjacent in the length direction. The non-shrink mortar 84 is filled between the surface of the concave portion 81 for use. The non-shrink mortar 84 is cured to form the water stop portion 8.

Then, the bar arrangement process which arrange | positions the reinforcing bar (longitudinal and horizontal bars 31) of the inner concrete part 3A is performed.
The transverse bars 31, 31 ... of the inner concrete part 3A are inserted into the reinforcing bar insertion holes 61, 61 ... of the displacement preventing member 6 of the precast concrete member 5A. The vertical and horizontal bars 31 of the inner concrete part 3 </ b> A are arranged in the inner concrete part forming empty part 51.
The unbonded steel bars 33, 33... Are installed so as to extend over the precast concrete members 5A, 5A of the adjacent units 52, 52.

Subsequently, a concrete filling step of filling the concrete material of the inner concrete portion 3A is performed.
The concrete material is integrally filled into the inner concrete portion forming cavities 51 of the arranged precast concrete members 5A. In the present embodiment, the precast concrete member 5A also serves as a mold for the inner concrete portion 3A.
The concrete material filled in the inner concrete portion forming void 51 is configured to reach both sides in the length direction of the connecting member 4A through the concrete material distribution hole 41 formed in the connecting member 4A. .
When the concrete material filled in the inner concrete part forming empty part 51 is hardened, the inner concrete part 3A is formed and the side wall 12A of the box culvert 1 is constructed.

  After the side wall 12A is constructed, a top plate construction process for constructing the top plate 13 at the site is performed. In the top plate construction process, an embedded mold 132 (see FIG. 1) is adopted as the lower frame of the top plate 13, and the upper side of the vertical bars 25a of the first precast concrete panel 23 and the second precast concrete panel 24, and the inner concrete. The upper side of the vertical bars of the portion 3 </ b> A is embedded in the concrete portion 131 of the top plate 13.

Next, operations and effects of the culvert wall structure and the culvert wall construction method according to the first embodiment will be described with reference to the drawings.
In the wall structure of the culvert according to the first embodiment described above, the inner concrete part forming void 51 is formed between the first precast concrete panel 23 and the second precast concrete panel 24 of the precast concrete member 5A. For this reason, in this embodiment, compared with the case where the side wall 12A of the box culvert 1 is constructed by arranging solid precast concrete members 5A having no voids such as the inner concrete portion forming voids 51, the precast concrete members are constructed. The weight of 5A can be reduced. Thereby, in this embodiment, 5 A of precast concrete members can be enlarged compared with 5 A of solid precast concrete members with the same weight.
As a result, the quantity of the precast concrete member 5A can be reduced, and the labor and construction period for constructing the box culvert 1 can be reduced.

Further, since the connecting member 4A is a steel plate arranged in a direction intersecting with each of the first precast concrete panel 23 and the second precast concrete panel 24, it is possible to bear a shearing force acting on the precast concrete member 5A. .
Further, the plurality of concrete material circulation holes 41, 41,... Are formed in the connecting member 4A, so that the inner concrete part forming void is formed via the plurality of concrete material circulation holes 41, 41,. Since the concrete material before hardening of the inner concrete part 3A filled in 51 can flow, the inner concrete part forming empty part 51 can be reliably filled with the concrete material of the inner concrete part 3A.

The first precast concrete panel 23 and the second precast concrete panel 24 can support the reinforcing bars of the inner concrete portion 3A, and each of the first precast concrete panel 23 and the second precast concrete panel 23 and the inner concrete portion 3A. Are provided, so that the inner concrete portion 3A can be easily arranged by using a member for preventing the displacement.
Further, in this embodiment, the precast concrete member 5A also serves as a mold for the inner concrete portion 3A, and work such as assembly and removal of the mold for constructing the side wall 12A at the site becomes unnecessary. The construction labor and construction period can be reduced.

  Further, in the present embodiment, the water stop portion 8 has a rough surface and has irregularities on the surface, and the head side of the dowel bolt 82 provided on the first precast concrete panels 23 and 23 protrudes from the surface. It is provided inside the recess 81 for water stop. And the water stop part 8 is the earthquake resistant water stop plate 83 arrange | positioned inside the recessed part 81 for water stop, and the non-shrink mortar 84 with which it filled between the surface of the earthquake resistant water stop plate 83 and the recessed part 81 for water stop. And have. Thereby, since the non-shrinkable mortar 84 is fixed to the unevenness of the surface of the recess 81 for water stop and the divel bolt 82, it is possible to prevent the non-shrink mortar 84 from peeling from the recess 81 for water stop when an external force is applied such as an earthquake. , Can increase the water-stopping property.

(Second Embodiment)
Next, the second embodiment will be described with reference to the accompanying drawings. However, the same or similar members and parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. A different configuration will be described.
As shown in FIG. 13, in the wall structure of the culvert according to the second embodiment, the structures of the precast concrete member 5B and the inner concrete portion 3B on the side wall 12B are the same as the precast concrete member 5A and the inner concrete portion 3A of the side wall 12A according to the first embodiment. Is different.

As shown in FIGS. 13 to 16, in the culvert wall structure according to the second embodiment, the first precast concrete panel 23 and the second precast concrete panel 24 are provided with the displacement preventing members 6, 6,. The first rebars 34, 34... Of the inner concrete portion 3B are joined.
The first reinforcing bars 34, 34... Extend in the thickness direction and protrude from the surface of the first precast concrete panel 23 and the second precast concrete panel 24 on the inner concrete part forming space 51 side. A plurality of first reinforcing bars 34, 34... Are arranged at intervals in the length direction and the height direction.

The first reinforcing bars 34, 34... Are joined to the first precast concrete panel 23 and the second precast concrete panel 24 by being joined to mechanical joints embedded in the first precast concrete panel 23 and the second precast concrete panel 24. Has been.
In addition to the first reinforcing bars 34, 34..., A plurality of horizontal bars extending in the length direction and vertical bars extending in the height direction are arranged in the inner concrete portion 3B.

  The front ends of the first rebars 34, 34... Are expanded in diameter compared to the base end side. The front ends of the first rebars 34, 34... Are separated from the inner surface of the first precast concrete panel 23 or the second precast concrete panel 24 facing each other. The front ends of the first rebars 34, 34... Projecting from the first precast concrete panel 23 are the second precast concrete than the front ends of the first rebars 34, 34. Arranged on the panel 24 side.

  Since these 1st rebars 34, 34 ... are arranged in the height direction and the length direction, it serves as a guide part which shows the position where the vertical and horizontal bars 31 of inner concrete part 3B are arranged. Further, the first reinforcing bars 34, 34... Can support the vertical bars and the horizontal bars 31 of the inner concrete part 3B by binding the vertical bars and the horizontal bars 31 (see FIG. 14) of the inner concrete part 3B.

  As shown in FIGS. 14, 16 and 17, the precast concrete member 5B of the second embodiment has a connecting member 4B for connecting the first precast concrete panel 23A and the second precast concrete panel 23B to that of the first embodiment. It is not a steel plate like 4 A of connection members, but is comprised with the member by which the four strip | belt-shaped steel plates 42-45 as shown in FIG. 14 were connected.

  The four steel plates 42 to 45 of the connecting member 4B are arranged such that the plate surfaces face the vertical direction. Two first steel plates 42 and 43 among the four steel plates 42 to 45 extend in the thickness direction and are arranged at intervals in the length direction. The first steel plates 42 and 43 have one end portions 42a and 43a in the thickness direction joined to the first precast concrete panel 23, and the other end portions 42b and 43b joined to the second precast concrete panel 24. Yes.

  The other two second steel plates 44 and 45 out of the four steel plates 42 to 45 extend in the horizontal direction intersecting the thickness direction, and are arranged so that the extending directions intersect and overlap each other. Has been. One of the second steel plates 44, 45 has a first end 44 </ b> A on one side in the extending direction of the first steel plate 42 of one of the two first steel plates 42, 43. The other end 44 b is joined to the end portion 42 a on the precast concrete panel 23 side, and the other end portion 44 b is joined to the end portion 43 b on the second precast concrete panel 24 side of the other first steel plate 43. Of the two second steel plates 44, 45, the other second steel plate 45 has one end 45 a in the extending direction joined to the end 43 a of the other first steel plate 43 on the first precast concrete panel 23 side. The other end 45b is joined to the second precast concrete panel 24 end 42b of the first steel plate 42.

  A plurality of such connecting members 4B are arranged at intervals in the height direction with respect to one precast concrete member 5B. In the present embodiment, as shown in FIG. 18, two connecting members 4B are arranged at intervals in the height direction on the upper side and the lower side of the precast concrete member 5B. In FIG. 18, the connecting member 4B is hatched for the sake of explanation.

  In the second embodiment, the first rebars 34, 34... Are joined to the first precast concrete panel 23 and the second precast concrete panel 24 in the precast concrete member manufacturing process. In the precast concrete member installation step, the precast concrete members 5B, 5B... With the first rebars 34, 34. In the bar arrangement process, the horizontal bars 31 of the inner concrete portion 3B are arranged immediately above or directly below the first reinforcing bars 34, 34.

In the wall structure of the culvert according to the second embodiment, the concrete material is filled in the inner concrete portion forming empty space 51 of the precast concrete member 5B arranged by arranging the precast concrete members 5B on the bottom slab 11, and the inner concrete portion 3B. Therefore, the same effects as those of the first embodiment can be obtained.
Moreover, in 2nd Embodiment, compared with 1st Embodiment, the concrete material before hardening of the inner side concrete part 3B is formed inside concrete part compared with 1st Embodiment because the connection member 4B is a form which assembled the strip | belt-shaped steel plates 42-45. The empty space 51 can be filled easily and reliably.
Moreover, in said embodiment, the 1st rebar 34,34 ... of the inner side concrete part 3B is joined to the 1st recast concrete panel 23 and the 2nd precast concrete panel 24, and this 1st rebar 34,34 ... is used. While showing the position of the vertical and horizontal bars 31 of the inner concrete part 3B and supporting the vertical and horizontal bars 31 of the inner concrete part 3B, it is possible to reduce the bar arrangement work of the inner concrete part 3B in the field. .

The embodiments of the culvert wall structure and the culvert wall construction method according to the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be changed as appropriate without departing from the scope of the present invention. .
For example, in the above embodiment, the precast concrete members 5A, 5A... (5B, 5B...) Are arranged without a gap in the length direction, but as shown in FIG. The concrete members 5A and 5A (5B and 5B) are separated from each other, and the portion 9 between the adjacent precast concrete members 5A and 5A (5B and 5B) may be formed of cast-in-place concrete.
In such a case, as shown in FIG. 20, between the precast concrete members 5A, 5A (5B, 5B) adjacent to the first precast concrete panel 23 and the second precast concrete panel 24 of the precast concrete member 5A (5B). Reinforcing bars 81, 81 embedded in the concrete of the portion 9 are joined in advance, and the on-site reinforcing work can be reduced.

In the first embodiment, the first precast concrete panel 23 and the second precast concrete panel 24 are provided with the detent members 6, 6,..., But may not be provided.
Moreover, in said 2nd Embodiment, although the 1st reinforcement 34,34 ... is provided in the precast concrete member 5B, it does not need to be provided. In the first embodiment, the first rebar 34 as in the second embodiment may be provided on the precast concrete member 5A.
Moreover, in said embodiment, although connection member 4A, 4B is comprised in the form which assembled the steel plate and the some strip | belt-shaped member, it connects the 1st precast concrete panel 23 and the 2nd precast concrete panel 24. As long as it does, forms other than the above may be sufficient.

Moreover, in said embodiment, although the water stop part 8 is formed between the 1st precast concrete panels 23 and 23 adjacent to a length direction in the boundary part of the units 52 and 52 adjacent to a length direction, You may form the water stop part 8 between the 2nd precast concrete panels 24 and 24 adjacent to a length direction as needed. Moreover, the form of the water stop part 8 may be other than the above.
For example, instead of the non-shrink mortar 84, fiber concrete may be filled. By doing in this way, it can further prevent that the water stop part 8 peels from the 1st precast concrete panels 23 and 23 at the time of an earthquake, and can improve a water stop.

DESCRIPTION OF SYMBOLS 1 Box culvert 2 Outer plate part 3A, 3B Inner concrete part 4A, 4B Connection member 5 Precast concrete member 6 Slip prevention member 8 Water stop part 11 Bottom plate 12A, 12B Side wall 13 Top plate 21 1st outer plate part (outer plate part)
22 Second skin part (skin part)
23 First precast concrete panel (precast concrete panel)
24 Second precast concrete panel (precast concrete panel)
34 First rebar (rebar)
41 Concrete material distribution hole (hole)
51 Inner concrete forming space 81 Water stop recess 82 Giber bolt (bolt)
83 Seismic waterproofing plate 84 Non-shrinkable concrete 231 Notch

Claims (10)

A pair of outer plate portions arranged to face both sides in the thickness direction;
A wall structure of a culvert having an inner concrete portion filled between the pair of outer plate portions,
Each of the pair of outer plate portions has precast concrete panels arranged in a length direction intersecting with the thickness direction,
The precast concrete panel of one outer plate portion of the pair of outer plate portions and the precast concrete panel of the other outer plate portion facing the precast concrete panel in the thickness direction are spaced in the thickness direction. It is a precast concrete member that is arranged with a gap and connected with a connecting member,
A wall structure of a culvert, wherein the precast concrete member is formed with an inner concrete part forming void in which the inner concrete part is formed between the facing precast concrete panels.   2. The culvert wall structure according to claim 1, wherein the connecting member is a steel plate that is joined to each of the facing precast concrete panels and arranged in a direction intersecting with each of the facing precast concrete panels.   The wall structure of the culvert according to claim 2, wherein a plurality of holes are formed in the steel plate.   4. The culvert wall structure according to claim 2, wherein the connecting member is configured to bear a shearing force acting on the precast concrete panel and the inner concrete portion. 5.   The said precast concrete panel is provided with the slip prevention member which can support the reinforcing bar of the said inner concrete part, and integrates the said precast concrete panel and the said inner concrete part. 5. The culvert wall structure according to any one of 4 above.   6. The culvert wall structure according to claim 1, wherein the precast concrete panel is provided with a reinforcing bar of the inner concrete portion. Having a water stop portion provided between the precast concrete panels adjacent in the length direction,
The water stop portion is formed inside a notch portion formed so as to communicate with each opposite end portion of the precast concrete panel adjacent in the length direction,
A bolt projecting on the precast concrete panel so as to project inward from the surface of the notch,
An earthquake-proof water stop plate disposed inside the notch,
A non-shrink mortar filled between the surface of the notch and the seismic resistant water plate,
The wall structure of the culvert according to any one of claims 1 to 6, wherein unevenness is formed on a surface of the notch. Having a water stop portion provided between the precast concrete panels adjacent in the length direction,
The water stop portion is formed inside a notch portion formed so as to communicate with each opposite end portion of the precast concrete panel adjacent in the length direction,
A bolt projecting on the precast concrete panel so as to project inward from the surface of the notch,
An earthquake-proof water stop plate disposed inside the notch,
Fiber concrete filled between the surface of the notch and the seismic resistant water plate,
The wall structure of the culvert according to any one of claims 1 to 6, wherein unevenness is formed on a surface of the notch. A pair of outer plate portions arranged to face both sides in the thickness direction;
An inner concrete portion filled between the pair of outer plate portions,
Each of the pair of outer plate portions has precast concrete panels arranged in a length direction intersecting with the thickness direction,
The precast concrete panel of one outer plate portion of the pair of outer plate portions and the precast concrete panel of the other outer plate portion facing the precast concrete panel in the thickness direction are spaced in the thickness direction. It is a precast concrete member that is arranged with a gap and connected with a connecting member,
In the precast concrete member, in the wall construction method of a culvert in which an inner concrete part forming hollow part in which the inner concrete part is formed between the opposing precast concrete panels is formed,
A precast concrete member production process for producing the precast concrete member;
A precast concrete member installation step in which the precast concrete panels to which the connecting members connect the precast concrete members are arranged in the length direction in a direction facing the thickness direction;
A concrete filling step of filling the concrete of the inner concrete part into the inner concrete part forming empty part of each of the precast concrete members arranged in the length direction, and a method for constructing a wall of a culvert, .   10. The culvert wall construction method according to claim 9, wherein in the precast concrete member manufacturing step, a rebar of the inner concrete portion is joined to the precast concrete panel.

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