JP3120941U - Box culvert - Google Patents

Abstract

The present invention relates to a box culvert, which prevents the surrounding soil layer from collapsing back by a wing-shaped extending member formed on the side surfaces of the left and right side walls of the box culvert body, It is easy to connect the reinforcing bars to the overhang member and is robust in structure, has a short construction period at the construction site, and improves the work efficiency.
A top wall portion 2 formed of concrete and facing vertically, a bottom wall portion 3, and side wall portions 4 and 4 facing left and right, the top wall portion, the bottom wall portion, The rebar 7 and the box which are reinforced with a wing-shaped projecting member 6 projecting from the side surface of the box culvert body 1 in which the water flow holes 5 are opened in the interior surrounded by the left and right side walls. Reinforcing bars 8 as structural members arranged in the culvert body are connected and molded.
[Selection] Figure 1

Description

  The present invention relates to a box culvert, which is used to flow clean water, drainage, rainwater, etc., and the surrounding soil layer collapsed back by wing-shaped overhang members formed on the sides of the left and right side walls of the box culvert body. In addition, the box culvert main body and the overhang member are easily connected to each other and are robust in structure, the construction period at the construction site is short, and the work efficiency is improved.

  Conventionally, for example, there is a box culvert as a concrete secondary product having a flow channel for flowing water, drainage, rainwater, etc., in the box culvert, It is composed of a bottom wall part and left and right side wall parts arranged opposite to the left and right, and the running water is flowing in the longitudinal direction inside surrounded by the top wall part, the bottom wall part, and the left and right side wall parts. In some cases, wing-shaped protruding members are formed on the side surfaces of the left and right side wall portions of the box culvert body in which the holes are opened.

  The box culvert protrudes outward from the left and right side wall outer surfaces at the bottom of the culvert body, so that when the box culvert is embedded in the ground, it is backfilled on the overhanging member. There will be a soil layer. As a result, even if an uplifting action is caused, the purpose is to prevent the positional displacement from occurring upward. In addition, since the bottom area of the box culvert is increased by an amount corresponding to the overhanging member, there is an effect that is intended to exert a proof strength (ground proof strength) against a load from above (for example, see Patent Document 1).

In addition, to retrofit a wing to a box culvert body as a concrete secondary product formed at a factory, first lay the box culvert body at the construction site, and then, for example, rebar as a structural material of the wing in the horizontal direction. After that, the desired number of steps are arranged, and then the reinforcing bar of the box culvert body and the reinforcing bar of the overhang member are connected using an insert or a connecting bar. Then, a wing was sometimes formed on the box culvert body on the construction site by assembling the mold and placing concrete in the mold.
Japanese Utility Model Publication No. 7-31999

  However, when the conventional box culvert described in Patent Document 1 is embedded in the ground, the protruding member protrudes outward from the outer surfaces of the left and right side walls only at the bottom of the box culvert body. Even if the lift action is triggered, it prevents the displacement of the upper part, and the bottom area of the box culvert is increased by the amount of the overhanging member, so that the load resistance from the top (ground strength) is demonstrated. It is intended to be effective.

  Therefore, the conventional box culvert described in Patent Document 1 is formed with wing-shaped projecting members projecting from the side surfaces of the left and right side wall portions of the box culvert body, and the projecting members are arranged on the left and right sides facing the opening for running water. By forming at the front end or the rear end of the side wall portion, the collapse of the soil layer that is backfilled by receiving the earth pressure of the surrounding soil layer backfilled with respect to the box culvert body is not prevented.

  Further, in the conventional box culvert described in Patent Document 1, the reinforcing bars arranged inside the overhang member in the factory are arranged in a desired number of stages in the horizontal direction, and the reinforcing bars are the top wall portion of the box culvert body. , The bottom wall, the horizontal stripes in the corresponding positions horizontally arranged in the longitudinal direction in the left and right side walls, and / or the desired rows in the vertical direction in the left and right side walls. Since it is connected to the vertical bar at the corresponding position, the back bar work of the reinforcing bar can be done quickly and easily as a structural material to be placed in the box culvert body and the overhang member, making it structurally robust, making and assembling work It becomes easy.

  Another conventional method for retrofitting a wing to a box culvert body as a concrete secondary product formed in a factory at the construction site is to first lay the box culvert body and then, for example, as a wing structural material. Place the reinforcing bars in the horizontal direction in the desired number of stages, then connect the reinforcing bars of the box culvert body and the reinforcing bars of the overhang member using inserts, connect using the differential bars, and then assemble the formwork, The above-mentioned conventional construction method for forming the wing on the box culvert body at the construction site by placing concrete in the formwork is as follows: the rebar of the completed box culvert body and the rebar of the overhang member To connect the reinforcing bar of the overhang member and connecting the reinforcing bar to the box culvert body, To require a lot of time and effort to the work of assembling the mold, construction period at the construction site is long, were those poor work efficiency.

  In addition, the reinforcing bars as the structural material are structurally fragile because the reinforcing bars of the box culvert main body and the reinforcing bars of the overhang member are connected at the joints.

  The present inventor has solved the above-mentioned conventional inconvenience, and the surrounding of the box culvert body backfilled by the wing-shaped projecting member formed at the front end or the rear end of the side surfaces of the left and right side walls of the box culvert body. Due to the earth pressure of the soil layer, the collapse of the soil layer is prevented, and the structural material between the reinforcing bar of the box culvert body and the reinforcing bar of the overhanging member is easy to connect, and the construction period at the construction site is short, An object of the present invention is to provide a box culvert with good working efficiency and structurally robust.

  The device according to claim 1 of the present invention is constituted by a top wall portion and a bottom wall portion which are made of concrete and are arranged to face each other vertically, and left and right side wall portions which are arranged to face left and right. And a wing-shaped side surface of the left and right side wall portions of the box culvert body in which a flowing water hole is opened in the longitudinal direction of the inside surrounded by the top wall portion, the bottom wall portion, and the left and right side wall portions. An overhang member is formed so as to protrude, and a reinforcing bar arranged inside the overhanging member and a reinforcing bar as a structural member arranged in the box culvert body are connected and molded.

Further, the invention according to claim 2 of the present invention includes a top wall portion and a bottom wall portion that are made of concrete and are arranged to face each other vertically, and left and right side wall portions that are arranged to face left and right. Wings on the side surfaces of the left and right side wall portions of the box culvert body having a water flow hole opened in the longitudinal direction of the inside surrounded by the top wall portion, the bottom wall portion, and the left and right side wall portions. In a box culvert formed by projecting a protruding member having a shape and connecting a reinforcing bar arranged inside the protruding member and a reinforcing bar as a structural member arranged in the box culvert body,
The overhang member is formed at a front end or a rear end of the left and right side wall portions facing the flowing water hole.

Further, the invention described in claim 3 of the present invention includes a top wall portion and a bottom wall portion that are made of concrete and are arranged to face each other vertically, and left and right side wall portions that are arranged to face left and right. Wings on the side surfaces of the left and right side wall portions of the box culvert body having a water flow hole opened in the longitudinal direction of the inside surrounded by the top wall portion, the bottom wall portion, and the left and right side wall portions. In a box culvert formed by projecting a protruding member having a shape and connecting a reinforcing bar arranged inside the protruding member and a reinforcing bar as a structural member arranged in the box culvert body,
The reinforcing bars arranged inside the overhang member are arranged in a desired number of stages in the horizontal direction, and the reinforcing bars are horizontally arranged in the longitudinal direction inside the top wall portion, the bottom wall portion, and the left and right side wall portions. It is characterized in that it is connected to the horizontal streak of the corresponding position to be arranged in the desired number of steps and / or the vertical streak of the corresponding position to be arranged in the desired number of rows in the vertical direction inside the left and right side walls.

  Further, in the device according to claim 4 of the present invention, in the device according to any one of claims 1, 2, and 3, the box culvert body and the left and right side wall portions include upper and lower upper constituent members, The upper component member is divided into two parts that can be brought into contact with the upper component member, and the upper component member and the lower component member are joined so as to be able to collide with each other via a connecting bar.

  According to the invention described in claim 1 of the present invention, the top wall portion and the bottom wall portion that are made of concrete and are arranged to face each other vertically, and the left and right side wall portions that are arranged to face left and right Wings on the side surfaces of the left and right side wall portions of the box culvert body having a water flow hole opened in the longitudinal direction of the inside surrounded by the top wall portion, the bottom wall portion, and the left and right side wall portions. A protruding member having a shape is formed so as to protrude, and a reinforcing bar arranged inside the protruding member and a reinforcing bar as a structural member arranged in the box culvert body are connected and molded. Therefore, the soil layer receives the earth pressure of the surrounding soil layer backfilled with respect to the box culvert body by the wing-shaped overhanging member formed at the front end or the rear end of the left and right side walls of the box culvert body. Prevents collapsing, and also facilitates the mutual connection of structural materials between the reinforcing bar of the box culvert body and the reinforcing bar of the overhang member, shortening the construction period at the construction site, improving the work efficiency, and structurally Become robust.

  According to the invention described in claim 2 of the present invention, the top wall portion and the bottom wall portion that are made of concrete and are arranged to face each other vertically, and the left and right side walls that are arranged to face the left and right sides. The side walls of the left and right side walls of the box culvert main body having a water flow hole opened in the longitudinal direction of the inside surrounded by the top wall, the bottom wall, and the left and right side walls. In a box culvert formed by projecting a wing-shaped overhang member and connecting a reinforcing bar arranged inside the overhanging member and a reinforcing bar as a structural member arranged in the box culvert body The overhanging member is formed at the front end or rear end of the left and right side wall portions facing the water flow hole, so that the front end or rear end of the side surface of the left and right side wall portions of the box culvert body The wing-shaped overhanging member that is formed receives the earth pressure of the surrounding earth layer backfilled against the box culvert body to prevent the collapse of the soil layer. Also, the reinforcing bar of the box culvert body and the reinforcing bar of the overhanging member The construction material can be easily connected to each other, the construction period at the construction site is short, the work efficiency is good, the construction is robust, and the level of the box culvert can be constructed easily and reliably.

  According to the invention described in claim 3 of the present invention, the top wall portion and the bottom wall portion which are made of concrete and are arranged to face each other vertically, and the left and right side walls arranged to face each other right and left The side walls of the left and right side walls of the box culvert main body having a water flow hole opened in the longitudinal direction of the inside surrounded by the top wall, the bottom wall, and the left and right side walls. In a box culvert formed by projecting a wing-shaped overhang member and connecting a reinforcing bar arranged inside the overhanging member and a reinforcing bar as a structural member arranged in the box culvert body The reinforcing bars arranged inside the overhanging member are arranged in desired horizontal stages in the horizontal direction, and the reinforcing bars are horizontally arranged in the longitudinal direction inside the top wall portion, the bottom wall portion, and the left and right side wall portions. The desired number of steps Are connected to the horizontal bars of the corresponding positions and / or the vertical bars of the corresponding positions arranged in a desired number of rows in the vertical direction inside the left and right side walls. The structural members can be easily connected to the reinforcing bars of the members, the construction period at the construction site is short, the work efficiency is good, and the structure is robust.

  According to the invention described in claim 4 of the present invention, the box culvert main body and the left and right side wall parts are vertically arranged as upper constituent members. And the lower component member provided so as to be able to collide with the upper component member, and the upper component member and the lower component member are joined so as to be able to collide with each other via a connecting bar. Even if it is a large box culvert with a large weight, the upper component member and the lower component member that are reduced in weight by being divided into two can be easily transported to the construction site individually and assembled. It is easy to connect the structural members of the box culvert body reinforcing bar and the reinforcing bar of the overhang member, the construction period at the construction site is short, the work efficiency is good, and the structure is robust.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view showing a first embodiment of a box culvert according to the present invention, and FIG. 2 is a plan view of the same.

  The first embodiment is made up of a top wall portion 2 and a bottom wall portion 3 that are made of concrete and are opposed to each other up and down, and left and right side wall portions 4 and 4 that are arranged opposite to the left and right. The left and right side walls of the box culvert body 1 in which a water flow hole 5 is opened in the inner longitudinal direction I surrounded by the top wall portion 2, the bottom wall portion 3, and the left and right side wall portions 4, 4. A wing-shaped projecting member 6 projects from the side surfaces of the portions 4, 4, a reinforcing bar 7 arranged inside the projecting member 6, and a reinforcing bar 8 as a structural material arranged in the box culvert body 1. Are connected and molded.

  The overhang member 6 is formed at the front end or the rear end of the left and right side wall portions 4, 4 facing the water flow hole 5. 1a is a haunch provided at the inner four corners of the water flow hole 5 for reinforcement against tensile force and compressive force. Reference numeral 6a denotes a haunch provided on the back surface of the drawing members 6 and 6 protruding from the left and right side wall portions 4 and 4 for reinforcement.

  Further, the reinforcing bars 7 arranged inside the projecting member 6 are arranged in a desired number of stages in the horizontal direction. The reinforcing bars 7 are arranged in the top wall 2, the bottom wall 3, the left and right side walls 4, 4 so as to be arranged in a desired number of steps horizontally in the longitudinal direction I, and / Alternatively, it is connected to vertical bars 10 at corresponding positions arranged in a desired number of rows in the vertical direction J inside the left and right side wall parts 4, 4. And the connection between these reinforcing bars 7 and the horizontal bars 9 or the connection between the reinforcing bars 7 and the vertical bars 10 is performed by assembling a formwork at the construction site and using an insert or using a differential bar. Unlike conventional methods, such as welding or bundling using metal wire rod.

  The box culvert according to the first embodiment of the present invention has the above-described configuration, and is disposed facing the left and right sides of the top wall portion 2 and the bottom wall portion 3 that are formed of concrete in the factory and are disposed facing each other vertically. The left and right side wall portions 4 and 4 are surrounded by the top wall portion 2, the bottom wall portion 3, and the left and right side wall portions 4 and 4. Wings-shaped overhanging members 6, 6 are formed on the side surfaces of the left and right side wall portions 4, 4 of the box culvert body 1 with an opening, and the reinforcing bars 7 are arranged inside the overhanging members 6, 6. Since the reinforcing bars 8 as the structural members arranged in the box culvert main body 1 are connected and molded, when the box main body 1 is laid, for example, as shown in FIG. Side surfaces of the left and right side wall parts 4 and 4 Collapse of the soil layer T by receiving the earth pressure of the surrounding soil layer T backfilled with respect to the box culvert body 1 by the wing-shaped overhanging member 6 formed at the front end or the rear end (not shown). Can be reliably prevented.

  Moreover, as described above, the wing-shaped overhanging member 6 protrudes from the box culvert body 1 at the front end or the rear end of the left and right side walls 4, 4 of the box culvert body 1. Since the laying posture at the start or end of the box culverts 1... 1 to be laid can be easily and reliably left and right balanced, laying work can be performed efficiently. In addition, after the laying of the box culvert, the surrounding soil layer T in which the soil backfilled around the laying portion of the box culvert body 1 is backfilled by the earth retaining action of the overhanging members 6 and 6 starts to collapse to the front surface or the rear surface. In addition to preventing the collapse of the culvert, the backfilled soil around the box culvert body 1 is leveled, and the appearance is also excellent.

  In the glove of the first embodiment, the reinforcing bars 7 and 8 as structural members of the reinforcing bar 8 of the box culvert body 1 and the reinforcing bar 7 of the overhanging member 6, that is, the reinforcing bar 7 is the top wall 2. In the bottom wall 3, in the left and right side walls 4, 4, the horizontal stripes 9 at corresponding positions are arranged horizontally in the longitudinal direction I and / or in the left and right side walls 4, 4. Unlike the conventional method of assembling a formwork at the construction site and connecting it using an insert or connecting using a differential bar to the vertical bars 10 of the corresponding positions arranged in a desired number of rows in the vertical direction J Reinforcement 7 and 8 are securely connected to each other at the factory by bundling using welding or metal wire rods (not shown in the figure). Since no connection work is required, the work period at the construction site is short and the work efficiency is high. Is improved.

  FIG. 3 shows a second embodiment of the present invention. In the second embodiment, the box culvert body 1 and the left and right side wall portions 4 and 4 are vertically connected to the upper component member 20A, The upper structural member 20A and the lower structural member 20B are divided into two parts, which are provided so as to be able to collide with the upper structural member 20A. The upper structural member 20A and the lower structural member 20B have a plurality of connecting bars 21 whose lower half or upper half projects. It is the structure characterized by joining so that it can collide via.

  And even if it is a large box culvert having a large weight, the upper component member 20A and the lower component member 20B which are reduced in weight by being divided into two can be easily transported and assembled individually to the construction site. In addition, since the connection between the structural members of the reinforcing bar 8 of the box culvert body 1 and the reinforcing bar 7 of the overhanging member 6 has already been completed at the factory, it is not necessary to do it on the construction site. Shorter, better working efficiency and structurally robust.

  In addition, the joining of the upper component member 20A and the lower component member 20B is performed such that, for example, the lower half portions 21a of the plurality of connecting bars 21 projecting from the lower surface of the upper member 20B face the connecting bars 21 at the construction site. The upper component member 20A can be easily and robustly secured by dropping into a drop hole 22 provided at a corresponding position on the upper surface of the lower component member 20A and fixing by pouring an adhesive such as cement paste or synthetic resin adhesive. A joining operation with the constituent member 20B can be performed. The other operations and effects are the same as those of the first embodiment.

  The present invention is adapted to receive soil pressure from the surrounding soil layer buried in the box culvert body by a wing-shaped projecting member formed at the front end or rear end of the side wall of the left and right side walls of the box culvert body. It prevents the collapse of the layer, and it is easy to connect the structural material of the reinforcing bar of the box culvert body and the reinforcing bar of the overhang member, the construction period at the construction site is short, the work efficiency is good, It becomes structurally robust.

FIG. 1 is a front view showing Embodiment 1 of a box culvert according to the present invention. FIG. 2 is a plan view of the same. FIG. 3 is a front view showing a second embodiment of the box culvert.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Box culvert main body 2 Top wall part 3 Bottom wall part 4 Side wall part 5 Flowing hole 6 Overhang member 7 Reinforcement 8 Reinforcement 9 Horizontal reinforcement 20A Upper structural member 20B Lower structural member 21 Connecting reinforcement I Horizontal direction J Vertical direction

Claims (4)

  The top wall portion and the bottom wall portion that are made of concrete and are arranged to face each other vertically, and the left and right side wall portions that are arranged to face the left and right sides, the top wall portion and the bottom wall portion And a wing-shaped projecting member is formed on the side surfaces of the left and right side wall portions of the box culvert body having a water flow hole opened in the longitudinal direction of the interior surrounded by the left and right side wall portions. A box culvert characterized in that a reinforcing bar arranged inside and a reinforcing bar as a structural material arranged in the box culvert main body are connected to each other. The top wall portion and the bottom wall portion that are made of concrete and are arranged to face each other vertically, and the left and right side wall portions that are arranged to face the left and right sides, the top wall portion and the bottom wall portion And a wing-shaped projecting member is formed on the side surfaces of the left and right side wall portions of the box culvert body having a water flow hole opened in the longitudinal direction of the interior surrounded by the left and right side wall portions. In the box culvert formed by connecting the reinforcing bars arranged inside and the reinforcing bars as the structural material arranged in the box culvert body,
The overhang member is formed at a front end or a rear end of the left and right side wall portions facing the water flow hole. The top wall portion and the bottom wall portion that are made of concrete and are arranged to face each other vertically, and the left and right side wall portions that are arranged to face the left and right sides, the top wall portion and the bottom wall portion And a wing-shaped projecting member is formed on the side surfaces of the left and right side wall portions of the box culvert body having a water flow hole opened in the longitudinal direction of the interior surrounded by the left and right side wall portions. In the box culvert formed by connecting the reinforcing bars arranged inside and the reinforcing bars as the structural material arranged in the box culvert body,
The reinforcing bars arranged inside the overhang member are arranged in a desired number of stages in the horizontal direction, and the reinforcing bars are horizontally arranged in the longitudinal direction inside the top wall portion, the bottom wall portion, and the left and right side wall portions. A box culvert that is connected to horizontal stripes of corresponding positions arranged in a desired number of steps and / or vertical bars of corresponding positions arranged in a desired number of rows in the vertical direction inside the left and right side walls.   The box culvert body and the left and right side wall parts are divided into an upper component member and a lower component member provided so as to be able to collide with the upper component member, and the upper component member and the lower component member are divided into two parts. The box culvert according to any one of claims 1, 2, and 3, wherein the box culverts are joined to each other via a connecting bar.

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