JP2020076267A - Water cut-off structure for flood prevention - Google Patents

Abstract

To provide a water cut-off structure for flood prevention capable of being installed without opening a hole in an existing revetment structure.SOLUTION: A water cut-off structure for flood prevention provided along a bank of a water area 102 includes: a leg portion 20 disposed on a top end 100A of an existing revetment structure 100 in a substantially horizontal direction; an erected portion 30 erected in a substantially vertical direction; and a raising portion 50 covering the leg portion 20 from above and adding dead weight to the leg portion 20 from above. The erected portion 30 includes: a plurality of posts 32 whose lower portion is fixed to the leg portion 20 to be erected and provided along a bank of a water area 102; and a water cut-off panel 34 attached to the posts 32. The water cut-off panel 34 is disposed so that one surface 34A of facing surfaces with a maximum area faces the water area 102.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a flood prevention and waterproof structure provided along the shore of a water area, and more specifically, to a flood prevention and waterproof structure provided along, for example, a revetment structure along a water area, a bank, or the vicinity thereof. In the present application, the term “water area” refers to an area where water is filled, for example, a river, lake, marine, or the like.

  Further, the present invention can be suitably applied when it is desired to install a flood prevention and water blocking structure without making a hole in an existing revetment structure.

  In recent years, many sudden heavy rains have occurred in Japan, and there are many reports that floods have caused floods. The current common method for floods is to prevent the flood by temporarily stacking sandbags and sandbags. This method has the advantage that it can be completed immediately if the required number of sandbags or waterbags are prepared in advance and the personnel needed to stack them are available. However, in recent years, due to lack of personnel, it may take time to accumulate the required number of sandbags or waterbags. In addition, even if the required number of sandbags or sandbags are piled up, the sandbags or waterbags do not have good followability to uneven ground, so that the adhesion to the ground surface is insufficient and there is a problem in waterproofness. is there.

  On the other hand, as a method other than stacking sandbags or sandbags, for example, a reinforced concrete battlement (parapet) may be installed. The method of installing the chest wall has an advantage that the watertightness at the ground contact surface is improved as compared with the method of stacking sandbags or waterbags, but there is a problem that the width of the road is reduced due to the thickness of the wall, In addition, there is a problem that the installation work becomes large-scale.

  On the other hand, Patent Document 1 discloses a technique in which it is possible to quickly and easily form a flood prevention barrier by connecting a plurality of individual sections by fastening means.

  Further, in Patent Document 2, it is said that the support member is configured to hold the panel member at an acute angle with respect to the horizontal, and the weight of water on the panel member is used to improve water tightness on the ground contact surface. The technology is disclosed.

  However, with the technique disclosed in Patent Document 1, the width of the partition that becomes a barrier becomes large, and the width of the road that can be used is reduced.

  Further, in the technique disclosed in Patent Document 2, since the panel member is held at an acute angle with respect to the horizontal, the width of the road that can be used is reduced.

  On the other hand, the present inventor, in the preceding patent application (Japanese Patent Application No. 2018-177800), has a small width in the horizontal direction orthogonal to the direction along the shore of the target water area, and is also excellent in waterproofness. , Proposal of flood prevention and waterproof structure with good workability during installation.

  However, this flood-prevention water-stopping structure requires that a hole be formed at the top of the existing revetment structure to install the columns.

Japanese Patent Publication No. 2016-532033 Japanese Patent Publication No. 2009-504946

  The present invention has been made in view of the above point, and an object of the present invention is to provide a flood prevention water stop structure that can be installed in an existing seawall structure without making a hole.

  The present invention has solved the above-mentioned problems by the following flood prevention water-stop structure.

That is, the flood prevention water-stop structure according to the present invention is a flood prevention water-stop structure provided along the shore of a body of water, and includes a leg portion arranged in a substantially horizontal direction on the top of the existing seawall structure. , An upright portion that is erected in a substantially vertical direction, and a raised portion that covers the leg portion from above and applies self-weight to the leg portion from above, and the upright portion has a lower portion. It has a pillar fixed to the leg portion and provided in plural along the shore of the body of water, and a water stop panel attached to the pillar, and the water stop panel faces each other. In the flood prevention and water stop structure, one of the faces having the maximum area is arranged so as to face the water area.

  The leg portion includes a rod-shaped member arranged in a substantially horizontal direction substantially orthogonal to a direction along the shore of the body of water, and a planar member attached to the rod-shaped member and arranged substantially horizontally. The lower portion of the column may be fixed to the rod-shaped member.

  The planar member may be attached to the lower surface of the rod-shaped member.

  As the rod-shaped member, for example, a steel material having an H-shaped cross section can be used.

  It is preferable that the planar member has a plurality of through holes.

  As the planar member, for example, expanded metal can be used.

  When a plurality of the planar members are provided along the shore of the water area, the adjacent planar members are structurally connected by overlapping end portions in the direction along the shore of the water area. Is preferred.

  Here, in the present application, “structurally connected” means connected so that a predetermined force can be transmitted.

  The flood prevention water-stop structure further includes a lower end plate-shaped body, and the lower end plate-shaped body is arranged such that the longitudinal direction is along the bank of the water area, and the maximum facing each other. It is preferable that one of the surfaces of the area is attached to the lower end portion of the water shut-off panel so that the one surface becomes the lower surface.

  The flood prevention water-stop structure further includes a lower end plate-shaped body, and the lower end plate-shaped body is arranged such that the longitudinal direction is along the bank of the water area, and the maximum facing each other. When attached to the lower end of the water shut-off panel so that one of the area faces is the lower surface, the planar member is configured to be attached to the lower end plate member. Good.

  It is preferable that the water shut-off panel is arranged such that its longitudinal direction is along the bank of the water area.

  It is preferable that the one surface of the water stop panel facing the water area is substantially vertical.

  The flood prevention water stop structure further comprises a side end plate-like body, the side end plate-like body is attached to both ends of the water stop panel in a direction along the shore of the body of water, The surfaces of the maximum areas of the side end plate-shaped bodies that are arranged from the lower end to the upper end of the water stop panel are orthogonal to the water stop panel, and the water stop panel is along the shore of the water area. Among the side end plate-shaped bodies that are provided in plural, and are attached to the water stop panels that are adjacent to each other in the direction along the shore of the water area, between the adjacent side end plate-shaped bodies and between the adjacent side end plate-shaped bodies. It is preferable that a joint material is provided in at least a part between the side ends of the water shut-off panel in a substantially height direction of the side end plate and the water shut-off panel.

  It is preferable that the adjacent side end plate members are structurally connected to each other.

  The adjacent side end plate members may be structurally connected by a bolt.

  The flood prevention water-stopping structure further has an upper end plate-shaped body, and the upper end plate-shaped body is arranged such that the longitudinal direction is along the bank of the water area, and has a maximum area facing each other. It is preferable that one of the surfaces is attached to the upper end of the water stop panel so that the upper surface is the upper surface.

  The waterproof panel may include a steel plate.

  The flood prevention water blocking structure may further include a vehicle protective fence, and the vehicle protective fence may be attached to the pillar.

  ADVANTAGE OF THE INVENTION According to this invention, the flood prevention water stop structure which can be installed without opening a hole in the existing revetment structure can be provided.

The front view which shows the flood prevention waterproof structure 10 which concerns on 1st Embodiment of this invention. The side view which shows the flood prevention waterproof structure 10 which concerns on 1st Embodiment of this invention. III-III sectional view taken on the line of FIG. The front view which shows the flood prevention waterproof structure 60 which concerns on 2nd Embodiment of this invention. The side view which shows the flood prevention water stop structure 60 which concerns on 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in the following embodiments, a river bank is described as a bank of a water area to be applied, but the bank of a water area to which the present invention is applied is not limited to the bank of the river.

(1) First Embodiment (1-1) Configuration of Flood Prevention Water Stop Structure According to First Embodiment FIG. 1 is a front view showing a flood prevention water stop structure 10 according to a first embodiment of the present invention. 2 is a side view showing the flood prevention water blocking structure 10 according to the first embodiment of the present invention, and FIG. 3 is a sectional view taken along line III-III of FIG. In FIG. 3, the description of the raised portion 50 is omitted.

  The flood prevention water blocking structure 10 according to the embodiment of the present invention includes a leg portion 20, an upright portion 30, and a raised portion 50. Further, as shown in FIGS. 1 and 3, a plurality of flood prevention water blocking structures 10 are arranged in a direction along the bank of the river 102.

  Hereinafter, each part (the leg portion 20, the standing portion 30, and the raised portion 50) will be sequentially described.

(1-1-1) Configuration of Leg 20 The leg 20 is a base of the flood prevention water stop structure 10 and is arranged substantially horizontally on the top 100A of the existing seawall structure 100. It is a part. The leg portion 20 is covered by the raised portion 50 from above, and the weight of the raised portion 50 is added from above, and the position of the leg portion 20 is fixed by this weight.

  The leg portion 20 includes a rod-shaped member 22 and a planar member 24.

  The rod-shaped member 22 is a steel material having an H-shaped cross section, and as shown in FIGS. 1 to 3, is arranged in a substantially horizontal direction substantially orthogonal to the direction along the shore of the river 102, and a plurality of members are arranged along the river 102. It is provided. On the upper surface of the end portion 22A of the rod-shaped member 22 on the river 102 side, the support column 32 of the standing portion 30 is attached by welding and fixed. The specific cross-sectional dimension and length of the rod-shaped member 22 having an H-shaped cross section is calculated by design calculation according to the water pressure expected at the time of flood, the height of the flood prevention water-stop structure 10, and the like. The dimensions are, for example, H150 × 150 × 7 × 10 (height 150 mm, flange width 150 mm, web thickness 7 mm, flange thickness 10 mm), and the length is specifically 1000 mm, for example. Note that the above-described dimensions of the rod-shaped member 22 are merely specific examples of dimensions, and the dimensions of the rod-shaped member 22 are not limited to the above-described dimensions. Further, in the first embodiment, the steel material having an H-shaped cross section is used as the rod-shaped member 22, but the shape of the steel material that can be used as the rod-shaped member 22 is not limited to this, and the column 32 and the planar member are not limited thereto. Any material that can fix 24 can be used. For example, a steel material having a cross section of I-shape or C-shape (groove shape) can be used, and also a round-tube-shaped or square-tube-shaped steel material can be used. You can

  The planar member 24 is a mesh-shaped expanded metal, and is attached to the lower surface 22B of the rod-shaped member 22 and the lower surface 36A of the lower end plate-shaped body 36 by welding, as shown in FIGS. The planar member 24 has a role of receiving the weight of the raised portion 50 and fixing the position of the entire flood prevention and water blocking structure 10. In addition, the attachment of the planar member 24 to the lower surface 22B of the rod-shaped member 22 and the lower surface 36A of the lower end plate-shaped member 36 does not have to be welding, but may be mechanically mounted using, for example, bolts. Further, the portion of the rod-shaped member 22 to which the planar member 24 is attached is not limited to the lower surface 22B, and may be another portion, and the portion of the lower end plate-shaped body 36 to which the planar member 24 is attached is the lower surface 36A. The position is not limited and may be another part.

  Since the expanded metal is a member having irregularities in the direction orthogonal to the plane, by using the expanded metal as the planar member 24, the legs 20 of the flood prevention water-stop structure 10 and the top end 100A of the existing seawall structure 100 are used. It is possible to increase the friction coefficient between the flood prevention water blocking structure 10 and the flood prevention water blocking structure 10 moves horizontally when the flood prevention water blocking structure 10 receives a horizontal force (for example, during an earthquake or flood). To prevent Further, the expanded metal also increases the coefficient of friction between the leg portion 20 of the flood prevention water blocking structure 10 and the raised portion 50, so that the raised portion 50 above the leg portion 20 of the flood prevention water blocking structure 10 may be damaged by an earthquake. At times, it prevents horizontal displacement from the top of the legs 20 of the flood prevention water blocking structure 10. Further, since the expanded metal is a mesh-shaped member, rainwater can escape downward, and rainwater does not collect on the upper surface of the planar member 24.

  The width of the planar member 24 (width in the direction along the river 102) is set to be slightly longer than the length of the water stop panel 34 so that the end portions of the planar members 24 adjacent in the direction along the river 102 overlap each other. It is preferable that the overlapping portions 24A connect the end portions of the adjacent planar members 24 to each other so that the adjacent planar members 24 in the direction along the river 102 are structurally linked to each other. The end portions of the adjacent sheet members 24 can be connected to each other specifically by using, for example, bolts and nuts, and the overlapping portions of the sheet members 24 can be connected via a splicing plate. By sandwiching the head portion of the bolt and the nut, the planar members 24 adjacent to each other in the direction along the river 102 can be structurally connected. In addition, when the planar member 24 is an expanded metal, the shaft diameter of the bolt is generally larger than the width of the mesh of the expanded metal, so that the expanded metal is superposed so that the shaft of the bolt can be inserted. Cut out the part, insert the shaft part of the bolt, and tighten it with a nut through the splicing plate to connect adjacent expanded metals.

  By structurally connecting the planar members 24 adjacent to each other in the direction along the river 102, even if driftwood or the like collides with one flood prevention and water stop structure 10 during a flood, the external force applied at that time is the same as that of the adjacent flood. Since the water is also transmitted to the preventive water stop structure 10, it is possible to prevent the flood preventive water stop structure 10 from colliding with driftwood or the like from collapsing.

  Although expanded metal is used as the planar member 24 in the first embodiment, the member that can be used as the planar member 24 is not limited to this, and the lower surface and the top end of the existing seawall structure 100 are not limited thereto. The coefficient of friction with 100A is not less than a predetermined value, the coefficient of friction between the upper surface and the raised portion 50 is not less than a predetermined value, and a through hole is provided so that rainwater can escape. Any planar member that is appropriately provided can be used.

(1-1-2) Configuration of Standing Part 30 The standing part 30 is a part that receives the water pressure of the flood at the time of flood, and is a wall-shaped part that is set up in a substantially vertical direction.

  The upright portion 30 includes a column 32, a water stop panel 34, a lower end plate-like body 36, a side end plate-like body 38, an upper end plate-like body 40, a central plate-like body 42, and joints. And a material 44.

  The pillar 32 has a lower end attached to the upper surface of the end portion 22A of the rod-shaped member 22 on the river 102 side by welding, and is fixedly erected, and is a pillar member provided in plural along the river 102. It is a member that holds the water panel 34. The support column 32 is in the shape of a rectangular tube, and its cross-sectional shape is specifically, for example, a square shape having an outer shape of about 100 mm × 100 mm. The total length of the columns 32 may be appropriately determined according to the thickness of the raised portion 50 and the height required as the water blocking wall of the flood prevention water blocking structure 10, but specifically, for example, about 0.85 m. (The height of the upper end of the column 32 is about 1 m from the top 100A of the existing seawall structure 100, considering the height 150 mm of the rod-shaped member 22 for fixing the column 32). It should be noted that the above-described dimensions of the support column 32 are merely examples of specific dimensions, and the shape of the support column 32 is not limited to the above-described dimensions. The shape of the support column 32 does not have to be a rectangular tube shape, and may be, for example, a cylindrical shape.

  The water stop panel 34 is a panel made of a steel plate having a thickness of about 6 mm, and is a plate-shaped body. The water stop panel 34 is attached to the two columns 32 so that the outer surface 34A (see FIG. 2) is located on the river 102 side and is a substantially vertical plane facing the river 102, and the longitudinal direction of the water stop panel 34 is the river. It is arranged so as to be along the direction 102. Accordingly, when the river 102 floods and water overflows, the overflowed water can be stopped. The size of the water stop panel 34 is about 4 m in width (width in the direction along the river 102) and about 1 m in height. The thickness and size of the water shut-off panel 34 may be appropriately changed depending on the water pressure assumed during a flood, the height of the flood prevention water shut-off structure 10, and the like.

  The outer surface 34 </ b> A of the water stop panel 34 is a surface (outer surface) of the inner and outer surfaces of the water stop panel 34 that is not attached to the support column 32 and is far from the support column 32, and faces the river 102. It is a face. The inner surface 34B of the water stop panel 34 is attached to the column 32 by welding, and is the surface opposite to the surface (outer surface 34A) facing the river 102. Further, the outer surface 34 </ b> A and the inner surface 34 </ b> B of the water stop panel 34 are surfaces of the maximum area where the water stop panel 34 faces each other.

  Further, the surface of the water blocking panel 34 may be subjected to a treatment for anticorrosion, and examples of the treatment for anticorrosion include mortar spraying, galvanization and painting.

  The water stop panel 34 is attached to the two support columns 32, and the two support columns 32 are each about 1 m from both ends (both ends in the direction along the river 102) of the water stop panel 34. The inner surface 34B is welded and attached to the two columns 32 at various positions. Since the length in the longitudinal direction of the water stop panel 34 (width in the direction along the river 102) is about 4 m, the distance between the two columns 32 is about 2 m. In addition, in the central portion between the two columns 32, a central plate made of an elongated steel plate having a thickness of 12 mm, a width (width in a direction orthogonal to the inner surface 34B of the water blocking panel 34) of 100 mm, and a length of about 1000 mm. The body 42 is attached to the inner surface 34B of the water shut-off panel 34 in the vertical direction by welding. The central plate-shaped body 42 reinforces the large-area water blocking panel 34 together with the lower end plate-shaped body 36, the side end plate-shaped body 38, and the upper end plate-shaped body 40 described later. The shape of the central plate member 42 is not limited to the above-described shape (thickness 12 mm, width 100 mm, length 1000 mm), and the thickness and width may be changed appropriately. However, it is preferable that the length of the central plate 42 be matched with the height of the water blocking panel 34 (about 1 m in the first embodiment) from the viewpoint of the reinforcing effect.

  Further, the water blocking panel 34 is attached to the two rectangular column-shaped columns 32 by welding at the above-mentioned two positions (positions that are about 1 m from both ends of the water blocking panel 34). The water stop panel 34 may be attached to the support column 32 by a method other than the above, and may be mechanically attached to the support column 32 using, for example, bolts.

  The lower end plate-shaped body 36 is a plate-shaped body made of an elongated steel plate having a thickness of 12 mm and a width (width in a direction orthogonal to the inner surface 34B of the water blocking panel 34) of about 100 mm. The lower end plate-shaped body 36 is one having a length of about 2000 mm, which is arranged between the two columns 32, and one side edge of the column 32 from the side surface of the column 32. Two pieces having a length of about 1000 mm arranged in the range up to the part are used.

  The lower end plate-like body 36 has a longitudinal direction on the inner surface 34B of the water stop panel 34 at a position such that the lower surface 36A of the lower end plate 36A coincides with the lower end of the water stop panel 34. Is attached by welding.

  The end portion of the lower end plate-like body 36 (the end portion in the direction along the river 102) contacts the side end portion of the rod-shaped member 22 except the positions of both end portions of the water stop panel 34, and is welded to that portion. At the positions of both ends of the water shut-off panel 34, they abut on the side surfaces of the lower end portion of the side end plate-like body 38, and are welded to those portions.

  As described above, the planar member 24, which is a mesh-shaped expanded metal, is attached to the lower surface 36A of the lower end plate-shaped body 36 by welding, as shown in FIGS.

  Therefore, the lower end plate-shaped body 36 has a role of not only reinforcing the water blocking panel 34 having a surface of about 4 m × 1 m, but also fixing the planar member 24 which is a mesh-shaped expanded metal. ..

  The side end plate-like body 38 is a plate-like body made of an elongated steel plate having a thickness of 12 mm, a width (width in a direction orthogonal to the inner surface 34B of the water blocking panel 34) of 100 mm, and a length of about 1000 mm, and the maximum facing area. With the arrangement state that the surface of is perpendicular to the inner surface 34B of the water stop panel 34, the longitudinal direction is the vertical direction, so that both ends of the inner surface 34B of the water stop panel 34 (both ends in the direction along the river 102). Attached by welding.

  A joint material 44 is provided between the adjacent side end plate-like bodies 38 of the adjacent flood prevention water blocking structures 10 and between the side ends of the adjacent water blocking panels 34 of the adjacent flood prevention water blocking structures 10. The gaps provided between the adjacent side end plate-shaped bodies 38 and between the adjacent side ends of the water blocking panels 34 are closed.

  Therefore, the side end plate-shaped bodies 38 not only serve to reinforce the water stop panel 34 having a surface of about 4 m × 1 m, but also have a joint material 44 between the adjacent side end plate-shaped bodies 38. And also has a role of closing the gap between the adjacent side end plate-like bodies 38 and between the adjacent side ends of the water blocking panels 34.

  Further, it is preferable that not only the joint material 44 closes the space between the adjacent side end plate-shaped bodies 38 but also the adjacent side end plate-shaped bodies 38 are structurally connected by a bolt or the like. By doing so, the adjacent flood prevention water blocking structures 10 are structurally connected to each other, and even if driftwood or the like collides with one flood prevention water blocking structure 10 at the time of flood, it is added at that time. Since the external force is also transmitted to the adjacent flood prevention water blocking structure 10, it is possible to prevent the flood prevention water blocking structure 10 from colliding with driftwood or the like from collapsing.

  The upper end plate-like body 40 is a plate-like body made of an elongated steel plate having a thickness of 12 mm, a width (width in a direction orthogonal to the inner surface 34B of the water blocking panel 34) of 100 mm, and a length of about 4000 mm, and the position of the upper surface 40A thereof. Is attached to the inner surface 34 </ b> B of the water stop panel 34 by welding so that the longitudinal direction is the width direction of the water stop panel 34 (the direction along the river 102) at a position such that the position coincides with the upper end of the water stop panel 34. ..

  Both ends (both ends in the direction along the river 102) of the upper end plate-like body 40 come into contact with the side surface of the upper end of the side end plate-like body 38, and contact with the side surface of the upper end of the side end plate-like body 38. It is welded.

  Further, the upper end of the support column 32 is in contact with and welded to the lower surface of the upper end plate member 40, and the upper end plate member 40 covers the upper end of the support column 32. Therefore, the upper end plate-shaped body 40 not only reinforces the water blocking panel 34, but also plays a role of covering the prismatic column-shaped column 32.

  The joint material 44 has a role of closing a gap between the adjacent side end plate-shaped bodies 38 and between the adjacent side ends of the water blocking panels 34. Further, the joint material 44 also has a role of absorbing thermal expansion and thermal contraction of the water blocking panel 34.

  In addition, the joint material 44 of the side end plate-like body 38 attached to the water stop panels 34 adjacent to each other in the direction along the river 102 does not leave a gap communicating between the river 102 side and the opposite side. Of these, the heights of the side end plate-like bodies 38 and the water stop panels 34 are substantially at least partly between the adjacent side end plate-like bodies 38 and between the side ends of the adjacent water stop panels 34. They are provided in a line without any break in the direction.

  As the joint material 44, it is preferable to use a material having elasticity and excellent shape following property, and since it is used outdoors, it is preferable to use a material which is not easily deteriorated by ultraviolet rays. Specifically, for example, elastite or rubber that is not easily deteriorated by ultraviolet rays can be used.

  In the flood prevention waterproof structure 10 according to the first embodiment, as described above, the gap between the adjacent side end plate-like bodies 38 and between the adjacent side ends of the waterproof panels 34 is the joint material. Since it is blocked by 44, the flood prevention water blocking structure 10 according to the first embodiment has excellent water blocking performance. The width of the region in which the joint material 44 is arranged (the width in the direction orthogonal to the inner surface 34B of the water stop panel 34) is the width of the side end plate member 38 (the direction orthogonal to the inner surface 34B of the water stop panel 34). The width of the water-blocking panel 34 is 106 mm, which is the total length of the water-blocking panel 34 and the thickness 6 mm of the water-stop panel 34. The waterproof structure 10 has a higher waterproof performance. However, the width of 106 mm is about the same as the width of the vehicle protective fence in the road width direction, which is currently used, and does not narrow the usable road width.

  The lower end plate-shaped body 36, the side end plate-shaped body 38, the upper end plate-shaped body 40, and the central plate-shaped body 42 are basically attached to the water stop panel 34, but may be appropriately omitted. Is also possible.

  Further, it is a principle that the joint material 44 is arranged so as to fill all the gaps between the adjacent side end plate-shaped bodies 38 and between the side ends of the adjacent water blocking panels 34, It is also possible to omit a part of the joint material 44 arranged in the gap between the adjacent side end plate-like bodies 38 and between the side ends of the water blocking panel 34. However, the joint material 44 of the side end plate-like body 38 attached to the water stop panels 34 that are adjacent in the direction along the river 102 does not leave a gap communicating between the river 102 side and the opposite side. Of these, the heights of the side end plate-like bodies 38 and the water stop panels 34 are substantially at least partly between the adjacent side end plate-like bodies 38 and between the side ends of the adjacent water stop panels 34. It is necessary to arrange them in a line without any break in the direction.

(1-1-3) Structure of the raised portion 50 The raised portion 50 is disposed on the top 100A of the existing seawall structure 100 to raise the height of the existing seawall structure 100 itself and prevent flooding. The leg 20 of the water structure 10 is covered from above, the weight of the leg 20 is added to itself, and the position of the leg 20 is fixed by this weight to fix the entire position of the flood prevention water stop structure 10. Have a role to play. However, as shown in FIG. 2, the position of the upper end of the water stop panel 34 of the standing portion 30 is higher than the top end of the raised part 50, and the height position of the upper end of the water stop panel 34 is higher. The role of the latter is to cover the legs 20 of the flood prevention and water shut-off structure 10 from above and add its own weight to the legs 20, and the weight of the legs is The role of fixing the position of 20 to fix the whole position of the flood prevention water blocking structure 10 is more important as the role of the raised portion 50 in the flood prevention water blocking structure 10 according to the first embodiment. is there.

  In the flood prevention water blocking structure 10 according to the first embodiment, the raised portion 50 is made of earth and sand that is normally present in nature (hereinafter, referred to as ordinary earth and sand). However, a material other than ordinary earth and sand may be used for the raised portion 50 as long as it can play the role of the raised portion 50 described above, for example, concrete, asphalt, stone, or gravel may be used. However, when it is required that the vehicle can pass over the raised portion 50, it is necessary to use a material that can withstand the passage of the vehicle for the raised portion 50.

  The required thickness of the raised portion 50 can be calculated by design calculation from the magnitude of the assumed horizontal external force applied to the standing portion 30 of the flood prevention water blocking structure 10 and the density of the material used. For example, a thickness of about 500 mm is standard.

(1-2) Construction Method of Flood Prevention Water Stop Structure According to First Embodiment In the flood prevention water stop structure 10 according to the first embodiment, the leg portion 20 and the standing portion 30 are manufactured in a factory. It is delivered to the site in a state where it is assembled by welding or the like (a state where it is assembled as shown in FIGS. 1 to 3). Further, the joint material 44 is attached to the side surface of the side end plate-like body 38 and the side end of the water stop panel 34 immediately before the site loading. Then, it is carried into the site and placed at a predetermined position on the top 100A of the existing seawall structure 100. When the top 100A of the existing revetment structure 100 is paved, the pavement is removed or the surface of the pavement is roughened with a concrete cutter or the like, and then the assembled leg 20 and the standing portion 30 are removed. , Is arranged at a predetermined position on the top end 100A of the existing seawall structure 100. Regarding the joint material 44 attached to the side surface of the side end plate-like body 38 and the side end of the water stop panel 34, normally, the flood preventive water stop structure 10 arranged adjacently along the shore of the river 102 is used. It is attached only to the side surface of one side end plate-like body 38 and the side end of the water stop panel 34, and is not attached to the side surface of the other side end plate-like body 38 and the side end of the water stop panel 34.

  After arranging the assembled leg portion 20 and the standing portion 30 at a predetermined position on the top end 100A of the existing seawall structure 100, a material used for the raised portion 50 is predetermined in a predetermined region including the upper portion of the leg portion 20. The load is applied to the leg 20 from above to fix the position.

  As described above, the flood prevention water blocking structure 10 according to the first embodiment can be constructed. If necessary, the raised portion 50 is subjected to treatment such as compaction. Further, when the vehicle passes over the raised portion 50, it may be considered to further pave the raised portion 50.

  It should be noted that not all the parts of the leg portion 20 and the standing portion 30 may be assembled at the factory by welding or the like, and some members may be assembled at the site by welding or the like.

(1-3) Effect of Flood Prevention Water Stop Structure According to First Embodiment In the flood prevention water stop structure 10 according to the first embodiment, the leg portion 20 arranged at the top end 100A of the existing seawall structure 100 is used. With the raised portion 50 covering from above, the weight of the raised portion 50 is added to the leg portion 20, and the position of the leg portion 20 is fixed by this weight to fix the entire position of the flood prevention waterproof structure 10. ..

  Therefore, the flood prevention water blocking structure 10 according to the first embodiment can be installed in the existing revetment structure 100 without making a hole.

  Further, the standing portion 30 of the flood prevention water blocking structure 10 according to the first embodiment has a small width in the direction orthogonal to the direction along the river 102, and is the road width direction of the vehicle protection fence currently used. The width is about the same as the width of the road, and it is easy to secure the road width even when the raised portion 50 is used as the road 104.

  In addition, most of the legs 20 and the upright portions 30 of the flood prevention water blocking structure 10 according to the first embodiment are made of steel, are lightweight, and have good workability during transportation to the site and installation. Excellent in Further, most of the legs 20 and the standing portions 30 of the flood prevention water blocking structure 10 according to the first embodiment can be carried into the site in a state of being manufactured and assembled in the factory. The work of installing the leg portion 20 and the standing portion 30 of the flood prevention waterproof structure 10 according to the first embodiment on the site can be facilitated, and the construction period on the site can be shortened.

  Further, by structurally connecting the planar members 24 adjacent to each other in the direction along the river 102, even if driftwood or the like collides with one flood prevention and water stop structure 10 during a flood, the external force applied at that time is adjacent. Since it is also transmitted to the flood prevention water blocking structure 10, it is possible to prevent the flood prevention water blocking structure 10 from colliding with driftwood or the like from collapsing.

  Further, since the gap between the adjacent side end plate-like bodies 38 and between the side ends of the adjacent water stop panels 34 is closed by the joint material 44, the flood prevention stop according to the first embodiment. The water structure 10 has excellent water stopping performance.

  Further, when not only the joint material 44 closes the space between the adjacent side end plate-shaped bodies 38 but also the adjacent side end plate-shaped bodies 38 are structurally connected by a bolt or the like, the adjacent floods are flooded. The preventive water blocking structures 10 are structurally connected to each other, and even if driftwood or the like collides with one flood preventive water blocking structure 10 during a flood, the external force applied at that time is applied to the adjacent flood preventive water blocking structure 10. Therefore, it is possible to prevent the flood prevention and water blocking structure 10 from colliding with driftwood or the like from collapsing.

(1-4) Supplement As described above, in the flood prevention water blocking structure 10 according to the first embodiment, the portion of the pillar 32 to which the water blocking panel 34 is attached is the side surface of the pillar 32 on the river 102 side. It is also possible to change the part of the support column 32 to which the water stop panel 34 is attached to the side surface of the support column 32 on the road 104 side.

(2) Second Embodiment FIG. 4 is a front view showing a flood prevention water blocking structure 60 according to a second embodiment of the present invention, and FIG. 5 is a flood prevention water blocking according to the second embodiment of the present invention. 3 is a side view showing a structure 60. FIG.

  The flood prevention water blocking structure 60 according to the second embodiment of the present invention is an embodiment in which a vehicle protection fence 70 is added to the flood prevention water blocking structure 10 according to the first embodiment, and specifically, the support column 64. On the other hand, a vehicle protective fence 70 is further added to the side of the road 104, which is the side opposite to the side of the river 102 (the side where the water stop panel 34 is attached).

  The flood prevention water stop structure 60 according to the second embodiment of the present invention is the same as the flood prevention water stop structure 10 according to the first embodiment except for the addition of a vehicle protection fence 70 and changes necessary accompanying it. Since they are the same, the members and parts corresponding to the flood prevention water blocking structure 10 according to the first embodiment are denoted by the same reference symbols in principle, and the description thereof will be omitted in principle.

  The flood prevention waterproof structure 60 according to the second embodiment has the vehicle protective fence 70 as described above, but the height of the vehicle protective fence from the road surface (for mounting the vehicle protective fence The height of the installation bolt from the road surface) is generally 600 mm. Since the flood prevention waterproof structure 60 according to the second embodiment includes the raised portion having a thickness of about 500 mm, the pillar 32 having a length of about 0.85 m of the flood prevention waterproof structure 10 according to the first embodiment. Then, the vehicle protection fence 70 cannot be attached with the installation bolt 70A at a height of 600 mm from the road surface 50A.

  Therefore, in the flood prevention water blocking structure 60 according to the second embodiment, the upright portion 62 uses the support column 64 having a length of about 1.15 m, and the installation bolt 70A for attaching the vehicle protection fence 70. The height from the road surface 50A of 600 mm can be secured.

  In the flood prevention waterproof structure 60 according to the second embodiment, the height of the installation bolt 70A from the road surface 50A is 600 mm, and the river 102 side (the waterproof panel 34) with respect to the support column 64. The protective fence 70 for vehicles is attached to the support | pillar 64 with the installation bolt 70A so that it may become the side of the road 104 which is the side opposite to the side (. Reference numeral 64A is a lid provided on the upper end of the support column 64.

  The flood prevention water stop structure 60, which is a mode in which the vehicle protection fence 70 is further attached to the flood prevention water stop structure 10 according to the first embodiment, has not only the function of flood prevention but also the safety of vehicle running. It also has a function to improve, and realizes highly effective utilization of the end space of the road 104 on the river 102 side.

10, 60 ... Flood prevention water-stop structure 20 ... Legs 22 ... Rod-like member 22A ... End 22B ... Lower surface 24 ... Sheet-like member 24A ... Stacking part 30, 62 ... Standing part 32, 64 ... Strut 34 ... Water stop Panel 34A ... Outer surface 34B ... Inner surface 36 ... Lower end plate-like body 36A ... Lower surface 38 ... Side end plate-like body 40 ... Upper end plate-like body 40A ... Upper surface 42 ... Central part plate-like body 44 ... Joint material 50 ... Raised part 50A ... Road surface 64A ... Lid 70 ... Vehicle guard fence 70A ... Installation bolt 100 ... Existing revetment structure 100A ... Crown 102 ... River 104 ... Road

Claims (17)

It is a flood prevention waterproof structure installed along the shore of the water area,
Legs arranged in a substantially horizontal direction on the top of the existing seawall structure,
An upright portion that is erected in a substantially vertical direction,
A raised portion that covers the leg portion from above and applies its own weight to the leg portion from above,
Have
The standing portion is
A lower part is fixed to the leg part and erected, and a plurality of columns provided along the shore of the water area,
A waterproof panel attached to the pillar,
Have
The water blocking panel according to claim 1, wherein the water blocking panel is arranged such that one surface of the surfaces having the largest area facing each other faces the water area. The legs are
A rod-shaped member arranged in a substantially horizontal direction substantially orthogonal to the direction along the shore of the water area,
A planar member attached to the rod-shaped member and arranged substantially horizontally,
Have
The flood prevention water-stop structure according to claim 1, wherein a lower portion of the pillar is fixed to the rod-shaped member.   The flood prevention waterproof structure according to claim 2, wherein the planar member is attached to a lower surface of the rod-shaped member.   The flood prevention waterproof structure according to claim 2 or 3, wherein the rod-shaped member is a steel material having an H-shaped cross section.   The flood prevention waterproof structure according to claim 2, wherein the planar member has a plurality of through holes.   The flood prevention water-stop structure according to any one of claims 2 to 4, wherein the planar member is an expanded metal. The planar member is provided in plurality along the shore of the water area,
7. The flood prevention water-stop structure according to claim 2, wherein the adjacent planar members are structurally connected such that their ends in the direction along the bank of the body of water overlap each other. .. The flood prevention waterproof structure further comprises a lower end plate-shaped body,
The lower end plate-shaped body is arranged such that the longitudinal direction is along the bank of the water area, and one of the faces of the maximum area facing each other is the lower face of the water blocking panel. The flood prevention water-stop structure according to any one of claims 1 to 7, which is attached to a lower end portion. The flood prevention waterproof structure further comprises a lower end plate-shaped body,
The lower end plate-shaped body is arranged such that the longitudinal direction is along the bank of the water area, and one of the faces of the maximum area facing each other is the lower face of the water blocking panel. The flood prevention waterproof structure according to any one of claims 2 to 7, wherein the flood prevention water stop structure is attached to a lower end portion, and the planar member is attached to the lower end plate member.   The flood prevention and water stop structure according to any one of claims 1 to 9, wherein the water stop panel is arranged such that a longitudinal direction thereof is along a bank of the water area.   The said waterproof panel WHEREIN: The said one surface which faces the said water area is a substantially vertical surface, The flood prevention waterproof structure in any one of the Claims 1-10 characterized by the above-mentioned. The flood prevention water blocking structure further includes a side end plate-shaped body,
The side end plate-like body is attached to both ends of the water stop panel in a direction along the shore of the water area, and is arranged from the lower end to the upper end of the water stop panel,
The surface of the maximum area facing the side end plate-shaped body is orthogonal to the water stop panel,
The water stop panel is provided in plurality along the shore of the water area,
Among the side end plate-shaped bodies attached to the water stop panels adjacent to each other in the direction along the shore of the water area, between the side end plate-shaped bodies adjacent to each other and the side of the water stop panel adjacent to each other. The joint material is provided in at least a part between the ends in a substantially height direction of the side end plate-shaped body and the water shut-off panel. Flood prevention water-stop structure.   The flood prevention and water stop structure according to claim 12, wherein the adjacent side end plate-shaped bodies are structurally connected to each other.   The flood prevention and water stop structure according to claim 13, wherein the adjacent side end plate-shaped members are structurally connected by a bolt. The flood prevention waterproof structure further has an upper end plate-shaped body,
The upper end plate-shaped body is arranged such that the longitudinal direction is along the shore of the water area, and one of the faces of the maximum area facing each other is the top face of the water blocking panel. The flood prevention water-stop structure according to any one of claims 1 to 14, which is attached to an upper end portion.   The flood prevention waterproof structure according to any one of claims 1 to 15, wherein the waterproof panel comprises a steel plate. The flood prevention waterproof structure further comprises a vehicle protective fence,
The flood prevention water-stop structure according to any one of claims 1 to 16, wherein the vehicle protective fence is attached to the pillar.

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