JP6326228B2 - Drainer - Google Patents

Description

  The present invention relates to a draining material used for a draining structure of a bridge slab.

  Most anti-freezing agents used in highways and other areas in winter in snowy cold regions use sodium chloride as the main raw material, and if snowmelt water containing this anti-freezing agent penetrates into the concrete structure of the bridge, the internal reinforcing bars This causes salt damage to corrode. Since the restoration of the location where the salt damage has occurred is very expensive, a means for reducing the spread of the snowmelt water on the concrete structure surface as much as possible is required in order to minimize the salt damage.

  For example, Patent Document 1 discloses a plate-like attachment plate for attachment to the lower surface of a concrete slab portion of a bridge, and a draining plate extending downward from the attachment plate in the length direction of the attachment plate. There is disclosed a drainer comprising: By attaching the draining body to the lower surface of the left and right side edge portions of the slab part, the snow melting water that has flowed from the side surface of the slab part to the lower surface drops down along the draining plate, and the snow melting water is inside the draining body. A so-called draining effect that prevents spreading is obtained.

JP 9-13327 A

  Although the draining board disclosed in Patent Document 1 has the advantage that it can be constructed relatively easily, when there is a large amount of water that wraps around the lower surface, the water drops dripping from the tip of the draining board are more inside than the draining board when there is a strong wind. There was a problem that it scattered toward the surface and adhered to the lower surface of the slab part inside the drained body.

  The subject of this invention is providing the draining material with the high draining effect which can solve the said problem, can prevent the spread of snowmelt water efficiently, and can suppress salt damage.

The first draining material of the present invention, for attachment to the underside of the deck of the bridge, the two plate-shaped mounting plate in parallel at intervals, continuous in the longitudinal direction of the mounting plate, 1 In a draining material comprising a sheet of lower shielding plate and an upper shielding plate branching left and right from the upper end of the lower shielding plate, and the upper ends of the left and right upper shielding plates are respectively attached to the mounting plate .
Wherein the lower end of the lower shielding plate to the right and left at least one direction of the lower shielding plate, is projecting horizontally or obliquely downward guide plate, provided continuously in the length direction of the lower shielding plate,
Each of the left and right upper shielding plates protrudes horizontally from the vicinity of the mounting position with the mounting plate, and a partition wall in which the tips of the left and right upper shielding plates are arranged in parallel with each other, and the left and right upper shielding plates are connected horizontally. The bottom plate is provided continuously in the length direction of the upper shielding plate .
The second draining material of the present invention comprises two plate-like attachment plates arranged in parallel at a distance to be attached to the lower surface of a bridge floor slab, and a length direction of the attachment plate. In a draining material comprising a sheet of lower shielding plate and an upper shielding plate branching left and right from the upper end of the lower shielding plate, and the upper ends of the left and right upper shielding plates are respectively attached to the mounting plate.
A guide plate protruding horizontally or obliquely downward in at least one of the left and right sides of the lower shielding plate from the lower end of the lower shielding plate is provided continuously in the length direction of the lower shielding plate,
A bottom plate that horizontally connects the left and right upper shielding plates is provided continuously in the length direction of the upper shielding plate.
The third draining material of the present invention comprises two plate-like attachment plates arranged in parallel at a distance to be attached to the lower surface of a bridge floor slab, and a length direction of the attachment plate. In a draining material comprising a sheet of lower shielding plate and an upper shielding plate branching left and right from the upper end of the lower shielding plate, and the upper ends of the left and right upper shielding plates are respectively attached to the mounting plate.
A guide plate protruding horizontally or obliquely downward in at least one of the left and right sides of the lower shielding plate from the lower end of the lower shielding plate is provided continuously in the length direction of the lower shielding plate,
Each of the left and right upper shielding plates protrudes horizontally from the vicinity of the mounting position with the mounting plate, and a partition wall in which the tips of the left and right upper shielding plates are arranged in parallel with each other, and the left and right upper shielding plates are connected horizontally. The bottom plate is provided continuously in the length direction of the upper shielding plate, and the partition is provided on the attachment plate side with respect to the bottom plate.

The present invention includes the following configuration as a preferred embodiment.
The guide plate protrudes on both the left and right sides of the lower shielding plate.
The leading edge of the guide plate is bent downward .

  ADVANTAGE OF THE INVENTION According to this invention, the high draining effect which dams rain water and snowmelt water which wraps around the lower surface of a floor slab reliably is acquired, and the influence by the water immersion to a concrete structure can be suppressed. Further, the draining material of the present invention is difficult to stagnate due to its structure, and corrosion of the draining material itself is prevented. Furthermore, by providing the adhesive intrusion portion on the side of the draining material of the present invention attached to the floor slab, it is possible to prevent the draining material from falling due to its own weight.

It is sectional drawing which shows typically the structure of preferable embodiment of the draining material of this invention. It is sectional drawing which shows typically the structure of other embodiment of the draining material of this invention. It is sectional drawing which shows the state which apply | coated the adhesive agent to the draining material of this invention. It is sectional drawing which shows typically the structure of other embodiment of the draining material of this invention. It is the schematic which shows typically the watering experiment in the Example of this invention. It is a flow volume setting flow in the Example of this invention.

  The draining material of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a preferred embodiment of the draining material of the present invention in a direction perpendicular to the length direction (hereinafter referred to as “width direction”).

  The draining material 1 of the present invention is preferably made of a lightweight and highly durable material, and examples of the material include iron, stainless steel, aluminum, and resin. Among these, stainless steel has high durability, but iron and aluminum can be improved in durability by surface treatment. Among these, aluminum is preferably used because it is lightweight and low-cost and can be manufactured at low cost by extrusion molding. It is desirable to use anodized aluminum to improve durability. As will be described later, the draining material of the present invention has a structure that is difficult to stagnate, and even a material that is easily corroded by water containing an antifreezing agent can be preferably used.

  In FIG. 1, 11 and 11 are plate-like attachment plates for attaching the draining material 1 of the present invention to the lower surface of the floor slab, and a shielding plate 12 extending downward from the attachment plates 11 and 11 is the attachment plate. 11 and 11 are provided continuously in the length direction.

  A feature of the present invention is that a guide plate 13 is provided continuously at the lower end of the shielding plate 12 in the length direction of the shielding plate 12. In this example, the guide plate 13 protrudes horizontally from the lower end of the shielding plate 12, and the structure is such that water easily flows along the length of the guide plate 13 on the upper surface of the guide plate 13. Usually, since the lower surface of the floor slab (hereinafter referred to as “floor slab lower surface”) has a predetermined inclination, when the draining material 1 of the present invention is attached along the inclination, The water reaching effect is obtained in which the reached water flows on the upper surface of the guide plate 13 in the length direction of the guide plate 13, and the water reaching the guide plate 13 is discharged at the end in the length direction of the draining material 1.

  In addition, as described above, since the guide plate 13 protrudes horizontally, the water that could not be guided by the upper surface of the guide plate 13 flows along the upper surface of the guide plate 13 that protrudes horizontally and flows from the draining material 1. Also scatters outward. That is, even during strong winds, there is no risk of water splashing inside the draining material 1, and water is prevented from adhering to the bottom surface of the floor slab inside the draining material 1.

  Furthermore, in this example, since the edge part 13a which bent the front-end | tip of the guide plate 13 toward the downward direction is provided, even when water accumulates on the upper surface of the guide board 13, the accumulated water does not use this edge part 13a. Since the water drops and drops downward, the stagnant water in the guide plate 13 is prevented. As described above, the amount of water transmitted to the edge portion 13a is greatly reduced by the water guiding effect of the guide plate 13 and the scattering effect to the outside, so that the amount of water scattered from the lower end of the edge portion 13a to the inside during a strong wind is small. The possibility of water adhering to the lower surface of the floor slab inside the drainer 1 is extremely low. In addition, the presence of the edge portion 13a prevents water from flowing into the lower surface of the guide plate 13 and prevents water from staying on the lower surface.

  Further, as shown in FIG. 1, by performing R processing so that the joint portion between the guide plate 13 and the shielding plate 12 has a curved surface, the water that has reached the guide plate 13 promptly moves in the length direction and outward. At the same time, the upper surface of the guide plate 13 is preferable because water hardly accumulates. Similarly, the bent portion for providing the edge portion 13a on the guide plate 13 is also subjected to R processing so that the water accumulated on the upper surface of the guide plate 13 is quickly transmitted to the edge portion 13a and the stagnant water on the upper surface of the guide plate 13 is obtained. The prevention effect can be obtained.

  In the present invention, as shown in FIG. 1, by providing the guide plate 13, drainage can be effectively performed, and at the same time, the water drainage to the guide plate 13 can be prevented to prevent corrosion of the drainage material 1. it can. Another embodiment capable of obtaining such an effect will be described.

  FIG. 2 is a cross-sectional view in the width direction of another embodiment capable of obtaining the effects of the present invention. FIG. 2A shows an example in which the guide plate 13 is configured to protrude obliquely downward from the lower end of the shielding plate 12 so that the guide plate 13 is less likely to stagnate. In this example, since the upper surface of the guide plate 13 is obliquely downward, the water guiding effect in the length direction of the guide plate 13 is smaller than that of the configuration of FIG. It flows on the upper surface of the guide plate 13 and scatters to the outside of the draining material 1, so that it is difficult for water to stay.

  FIG. 2B is an example in which the tip of the guide plate 13 is projected horizontally and the edge portion 13a is not provided as in FIG. In this example, since the edge portion 13a is not provided, the water stagnation prevention effect on the upper surface of the guide plate 13 is not as good as the configuration of FIG. 1, but the water that has reached the upper surface of the guide plate 13 through the shielding plate 12 is Due to the water guiding effect, it flows in the length direction of the guide plate 13 or scatters from the tip of the guide plate 13 to the outside, and a good draining effect is obtained.

  Further, FIG. 2C is an example in which the shielding plate 12 and the guide plate 13 in FIG. 1 are combined and a curved member 14 having a circular section is used, and water transmitted from the lower surface of the mounting plate 11 is curved. Since it scatters toward the outer side of the draining material 1 along the curved surface of the member 14, the draining effect is high. In this example, since there is no bent part in the middle of the bending member 14, the bending member 14 does not stagnate and the draining material 1 has a high corrosion prevention effect.

  In the embodiment shown in FIGS. 1 and 2, the guide plate 13 protrudes from the lower end of the shielding plate 12 to the left and right sides. However, in the present invention, it only needs to protrude to at least one side.

  Further, in the present invention, by providing the guide plate 13, the draining material 1 can be supported by pressing the guide plate 13 by hand during installation to the floor slab, and the construction is facilitated. Can also be obtained.

  Further, in the draining material 1 of FIG. 1, the shielding plate 12 includes a single lower shielding plate 12b and upper shielding plates 12a and 12a branched from the upper end of the lower shielding plate 12b to the left and right. It is configured to be a letter shape. In this example, the upper ends of the upper shielding plates 12a and 12a are respectively attached to the attachment plates 11 and 11 arranged in parallel at an interval. The attachment position of the upper shielding plates 12a, 12a to the attachment plates 11, 11 is outside the opening between the attachment plates 11, 11. In the example of FIG. 1, partition walls 16 and 16 are further provided to protrude horizontally from the vicinity of the attachment positions of the upper shielding plates 12 a and 12 a with the attachment plates 11 and 11. The partition walls 16 and 16 are arranged in parallel with their tips spaced apart from each other, and are provided continuously in the length direction of the upper shielding plates 12a and 12a. Furthermore, in the example of FIG. 1, a bottom plate 17 that horizontally connects the upper shielding plates 12a and 12a is provided below the partition walls 16 and 16 continuously in the length direction of the upper shielding plates 12a and 12a. Yes. As a result, in the cross section in the width direction, the attachment plate 11, 11, the upper shielding plates 12 a, 12 a, and the bottom plate 17 constitute a region 15 having an open top, and in this example, the region 15 is designated as the draining material 1. Is used as an adhesive intrusion when attaching to the underside of the floor slab.

  FIG. 3 is a cross-sectional view showing a state in which the adhesive 18 is applied to the mounting plates 11 and 11 of the draining material 1 of this example. The adhesive 18 applied to the mounting plates 11 and 11 enters the intrusion portion 15 through the gap between the mounting plates 11 and 11. Here, by pressing the adhesive 18 from above as necessary, the adhesive 18 that has entered the intrusion portion 15 causes the gap between the partition wall 16 and the mounting plate 11 and the gap between the partition wall 16 and the bottom plate 17. As shown in FIG. 3, the adhesive layer has a shape having a “return”. Thereby, even if it is a case where peeling arises between the adhesive agent 18 and the draining material 1, the danger that the draining material 1 will fall with dead weight is prevented.

  As shown in FIG. 4, the above-described effect of preventing the draining material 1 from falling can be obtained without the partition walls 16, 16, but by providing the partition walls 16, 16 that divide the intrusion portion 15 in the vertical direction, the partition wall 16 , 16 is preferable because the adhesive layer is turned up and down. Similarly, even if the bottom plate 17 shown in FIG. 3 is not provided, the adhesive layer can be turned back. In this case, the lower end of the upper shielding plates 12a and 12a and the upper end of the lower shielding plate 12b are formed. It is necessary to fill the adhesive 18 up to the joint, and a large amount of adhesive is required. Therefore, it is preferable to provide the bottom plate 17 in order to efficiently form the turnover. Moreover, the shielding board 12 can also be reinforced by providing the bottom board 17 which connects the upper shielding boards 12a and 12a.

  1, 2 (a), 2 (b), 3, and 4, the upper shielding plates 12 a and 12 a are branched so as to be two sides of the triangle in the cross section in the width direction. However, the present invention is not limited to this. For example, the upper shielding plates 12a and 12a may once be branched in the horizontal direction and bent in the vertical direction so that the upper portion has a square shape, or the upper shielding plates 12a and 12a may be curved. As shown in FIG. 1, the structure in which the upper shielding plates 12a and 12a are branched so as to form a triangle is preferable because the amount of material used is small and manufacturing is easy.

  As an adhesive used for attaching the drainer 1 of the present invention to the bottom surface of the floor slab, the surface of the bottom surface of the floor slab is often rough due to the influence of rain water or deterioration over time. Since unevenness due to unevenness occurs, a resin adhesive that is easy to bond on such a surface and difficult to peel off is preferably used. Specifically, various adhesives such as urethane-based, acrylic-based, epoxy-based, and silicon-based adhesives are used. Of these, silicone-based adhesives are preferably used from the viewpoint of water resistance, economy, and workability.

  In addition, the attachment method to the floor slab lower surface of the draining material 1 of this example is not restricted to the above-described adhesive, and an attachment member such as a screw may be used.

  The draining material 1 of the present invention is attached along the side surface in the vicinity of both side surfaces of the floor slab of the bridge, thereby preventing the water that goes from the side surface to the lower surface from spreading to the lower surface. Can do. Moreover, it can prevent that the water which leaks from this expansion-contraction apparatus spreads to this lower surface by attaching along the expansion-contraction apparatus in the vicinity of the expansion-contraction apparatus of a floor slab lower surface.

  As shown in FIG. 5, the water draining material 1 of FIG. 1 was attached to the lower surface of a specimen 51 simulating an actual structure with an adhesive, and watering was performed by sprinkling water on the upper surface of the specimen 51. FIG. 5A is a diagram showing a water sprayed state on the specimen 51, and FIG. 5B is a diagram showing an attachment position of the draining material 1 on the specimen 51. FIG. Water was introduced from the hose 52 to the upper surface of the specimen 51 and sprinkled with a vinyl chloride tube 54 having a plurality of holes. The specimen 51 was made using an acrylic plate. As a comparative example, a watering experiment was performed in the case where the draining material 1 was not attached and in the case where a common cross-section face wood was attached as the draining material. The draining material 1 of the present invention used three types having a height of 20 mm, 30 mm, and 40 mm.

  The amount of water sprayed is (1) the amount of water flowing on the concrete during the winter or snowmelt season, (2) the heavy rain that has been occurring frequently in recent hours, over 100 mm, and (3) more unexpected unexpected heavy rain patterns. It was. The amount of water sprinkled (flow rate) was adjusted to the amount of water accumulated in a specified time in a water tank whose volume was determined in advance, and water was always sprinkled with a constant amount of water during the experiment. Regarding the pattern of (1), the amount of water was visually adjusted. The flow rate setting flow is shown in FIG.

  As shown in FIG. 6, first, the area of the upper surface of the specimen 51 of FIG. 5 (the outflow area at the time of experiment, A1) and the bottom area (A2) of the measurement container were measured, respectively (1), ( 2) The water level (H) in the measurement container corresponding to each pattern of (3) is determined. Next, water is discharged from the hose 52 of FIG. 5 to the measurement container, and the opening position of the cock 53 is adjusted, and the opening position of the cock 53 at which a predetermined water level is obtained in a predetermined time is recorded. In the configuration of FIG. 5, the cock 53 was opened at an open position corresponding to each of the patterns (1), (2), and (3), and a watering experiment was performed.

  As a result, when the draining material was not used, it was confirmed that about 300 mm of water circulated in the depth direction on the lower surface of the specimen 51. In addition, it was confirmed that when a general face wood was attached, the water was scattered in the depth direction even after the water had run out due to the effect of the face wood angle and the length per side.

  When the draining material 1 of the present invention was used, the draining effect and the water guiding effect were surely obtained with the water amount of (1). In the case of the above (2) and (3), it was confirmed that water was slightly scattered in the depth direction in the draining material 1 having a height of 20 mm, but in the draining material 1 having a height of 30 mm and 40 mm. The water flowing on the surface of the draining material 1 was all scattered outside.

  Furthermore, in a bridge in the Tohoku region that has passed over 35 years since the start of service, the drainage material 1 of the present invention having a length of 1 m was attached to the ground cover and the bottom surface of the overhang with an adhesive to confirm the adhesion performance and drainage performance. All the attached parts had deteriorated, such as peeling of the concrete surface into thin layers due to the effects of rainwater and antifreezing agents and repeated freezing and thawing for many years, but even if a person hangs about 1 hour after bonding It turned out that it has sufficient adhesive force, without peeling.

  Moreover, when it checked after raining at the time of raining and the next day after raining, water was cut out exactly, and it was not directly scattered to the concrete frame inside the draining material 1, and the water-conducting effect was also confirmed.

  1: draining material, 11: mounting plate, 12: shielding plate, 12a: upper shielding plate, 12b: lower shielding plate, 13: guide plate, 14: shielding plate and guide plate, 15: intrusion part, 16: partition wall, 17 : Bottom plate, 18: Adhesive, 51: Specimen, 52: Hose, 53: Cock, 54: Vinyl chloride tube

Claims (5)

Two plate-like mounting plates arranged in parallel at a distance to be attached to the lower surface of the bridge floor slab , one lower shielding plate continuous in the length direction of the mounting plate, and the lower shielding An upper shielding plate that branches left and right from the upper end of the plate ;
Wherein the lower end of the lower shielding plate to the right and left at least one direction of the lower shielding plate, is projecting horizontally or obliquely downward guide plate, provided continuously in the length direction of the lower shielding plate,
Each of the left and right upper shielding plates protrudes horizontally from the vicinity of the attachment position with the attachment plate, and a partition wall in which the ends of the upper and lower shielding plates are arranged in parallel with an interval is continuously provided in the length direction of the upper shielding plate. A draining material characterized by being provided . Two plate-like mounting plates arranged in parallel at a distance to be attached to the lower surface of the bridge floor slab, one lower shielding plate continuous in the length direction of the mounting plate, and the lower shielding An upper shielding plate that branches left and right from the upper end of the plate;
A guide plate protruding horizontally or obliquely downward in at least one of the left and right sides of the lower shielding plate from the lower end of the lower shielding plate is provided continuously in the length direction of the lower shielding plate,
The left and right upper shield bottom plate connecting horizontally with each other, the upper shield water cutting member characterized in that is provided continuously in the longitudinal direction of the. Two plate-like mounting plates arranged in parallel at a distance to be attached to the lower surface of the bridge floor slab, one lower shielding plate continuous in the length direction of the mounting plate, and the lower shielding An upper shielding plate that branches left and right from the upper end of the plate;
A guide plate protruding horizontally or obliquely downward in at least one of the left and right sides of the lower shielding plate from the lower end of the lower shielding plate is provided continuously in the length direction of the lower shielding plate,
Each of the left and right upper shielding plates protrudes horizontally from the vicinity of the mounting position with the mounting plate, and a partition wall in which the tips of the left and right upper shielding plates are arranged in parallel with each other, and the left and right upper shielding plates are connected horizontally. A draining material, wherein a bottom plate is provided continuously in a length direction of the upper shielding plate, and the partition wall is provided closer to the mounting plate than the bottom plate . The draining material according to any one of claims 1 to 3, wherein the guide plate protrudes on both right and left sides of the lower shielding plate. The draining material according to any one of claims 1 to 4, wherein a leading edge of the guide plate is bent downward.

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