JP4757249B2 - Overtopping prevention structure - Google Patents

Description

  The present invention relates to a wave overtopping prevention structure. For example, in harbors and coastal coastal areas, bank protection structures such as dikes and chest walls (hereinafter collectively referred to as dikes) are installed. It relates to a structure to prevent overtopping that protects human lives and buildings on land from overtopping.

  Conventionally, the height of the embankment is set to an appropriate height because the landscape becomes worse and the installation cost increases.

  In order to prevent overtopping as much as possible even at an appropriate height, the top of the levee can be tilted toward the sea side or curved to reduce overtopping, or the height of existing levee can be raised to prevent overtopping. It was thought.

  This type of overtopping prevention structure consists of a concrete structure block and a metal aggregate frame structure, and supports the concrete structure with the frame structure, and a wavebreak structure that fastens the frame structure together. The one added to the side is known (for example, refer to Patent Document 1).

Further, a wave overtopping prevention structure (for example, refer to Patent Document 2) in which a protrusion formed of a member having elasticity such as rubber is fastened to a dike with a bolt or the like, and an upper end portion of an existing dike is excised There is known a wave-breaking structure in which a block of a newly installed levee is installed on a lower portion of an existing levee instead of the portion and joined with an anchor reinforcing bar or the like (see, for example, Patent Document 3). Moreover, it is also known about raising a bank (for example, refer patent document 4).
JP 2002-227167 A (Claims, FIGS. 7 and 16) JP-A-3-293415 (FIG. 7) Japanese Patent Laying-Open No. 2006-161402 (Claims, FIG. 2) Japanese Patent Laying-Open No. 2005-133291 (Claims, FIG. 1)

  However, in the breakwater structure described in Patent Document 1, the structure is such that a concrete structure is supported by a metal aggregate structure and the frame structures are fastened together. Is the same as installing. In addition, although an example in which an existing levee is left to be expanded is described, the construction is equivalent to a new levee construction, and there is a problem that the existing levee is not improved and the structure is complicated and the construction is troublesome.

  On the other hand, according to the techniques described in Patent Documents 2 and 3, an overtopping structure can be attached to the existing levee. However, the ones described in Patent Documents 2 and 3 are both ones of the existing levee. After cutting out the part, a new overtopping prevention body was attached to the part that was cut out, and this also had a problem that the construction was troublesome.

  Moreover, the thing of patent document 4 is only what raises, and the problem which spoiled a scenery was left.

  The present invention has been made in view of the above circumstances, and provides an overtopping prevention structure that facilitates installation of an overtopping prevention structure on an existing embankment (including a chest wall, a seawall, etc.) and facilitates construction. Objective.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that the base end side is attached to the upper end portion of the levee and extends toward the offshore side, and the top end side of the top plate An aluminum corrugated plate having one end connected via a joint and the other end attached to the sea side of the levee is provided.

  By configuring in this way, the base end side of the aluminum top plate is attached to the upper end of the dike, the top plate is extended toward the offshore side, and one end is connected to the top end side of the top plate via a joint. The other end of the corrugated return plate can be attached to the sea side of the dike. Therefore, the overtopping structure can be assembled on the existing dike.

  In the present invention, it is preferable that the top surface of the top plate is formed with a downward slope toward the offshore side. Thereby, the seawater collected on the upper surface of the top plate flows on the downward slope surface and is drained to the sea side.

  Moreover, it is preferable to provide a drain hole in the top plate. Thereby, the seawater collected on the upper surface of the top plate is drained to the sea side through the drain hole.

  According to a fourth aspect of the present invention, in the wave overtopping prevention structure according to any one of the first to third aspects, the base end side of the top plate is attached across the upper end surface of the levee, and the base end of the top plate An aluminum water return plate having an intrusion prevention wall standing above the top surface of the top plate is attached to the part. In this case, it is preferable that the intrusion prevention wall of the water return plate is bent concavely toward the sea side.

  By comprising in this way, a top plate can be attached to a dike in the state which straddled the top plate on the upper end surface of a dike on a dike. In addition, seawater that gets over the top plate and flows into the land side can be sent back to the sea side by the intrusion prevention wall.

  According to a sixth aspect of the present invention, in the overtopping prevention structure according to any one of the first to fifth aspects, the top plate and the return plate are formed of a plurality of aluminum hollow extruded shapes joined together. It is characterized by. In this case, a fitting groove is formed on one of the joining end portions of the top plate and the wave return plate that are joined together, and a fitting protrusion that can be fitted on the fitting groove is formed on the other. (Claim 7) In addition, a narrow opening-shaped engagement groove is formed at the joint end of the top plate and the wave return plate to be bonded to each other, and a seal packing is fitted in each engagement groove. The top plate and the return plate to be joined and fixed can be butted and joined together (Claim 8), or inwardly directed to one of the joining ends of the top plate and the return plate to be joined together A first engagement piece having an engagement groove and a second engagement piece having an outward engagement protrusion are formed to face each other, and the other is fitted to the outward engagement protrusion. A first engagement piece having a possible inward engagement groove, and a second engagement piece having an outward engagement protrusion that can be fitted to the inward engagement groove And a wedge member is inserted into and joined to the space between the second engagement pieces in a state where the inward engagement protrusions and the outward engagement protrusions are engaged with each other. (Claim 9).

  By comprising in this way, a top plate and a wave return board of arbitrary dimensions can be formed by joining a plurality of aluminum hollow extruded sections.

  The joint includes a first joint member made of aluminum attached to the tip of the top plate, a second joint member attached to one end of the return plate, the first joint member, and a second joint member. A hinge pin that rotatably couples the joint member (Claim 10), or the joint is a concave arc-shaped first fitting groove formed at the tip of the top plate. A first bulging engagement convex portion that is pivotably fitted in the inner portion and a concave arc-shaped second fitting recess formed at one end of the wave return plate are pivotally fitted. It can be formed of an aluminum joint member having a second bulge engagement convex part (claim 11), or the joint is substantially L-shaped fixed to the lower surface of the top side of the top plate. A first bracket, a substantially L-shaped second bracket fixed to one side surface of the wave return plate, and an upright of the first bracket When can a standing pieces of the second bracket is composed of a connecting member for rotatably connected (claim 12).

  By comprising in this way, a wave return board can be displaced with respect to a top plate, and it can attach to the arbitrary positions on the sea surface side of a dike. In this case, the component member of the joint is constituted by the substantially L-shaped first bracket and the second bracket, so that the top plate and the wave return plate are displaceably connected using the common component member. (Claim 12).

  The invention according to claim 13 is the overtopping prevention structure according to any one of 1 to 3 or 6 to 12, wherein the first fixture for attaching the base end portion of the top plate to the upper end portion of the levee; A second fixture for attaching the other end of the wave return plate to the sea side of the levee, and the first fixture is substantially L-shaped fixed to the lower surface of the base end of the top plate. A first mounting bracket; a substantially L-shaped second mounting bracket that is fixed to the sea side of the levee; and a rising piece of the first mounting bracket and A first connecting member that rotatably connects the upright piece of the mounting bracket of the second mounting bracket, and the second mounting tool is substantially L-shaped fixed to the side surface of the other end of the wave return plate. A third mounting bracket, a substantially L-shaped fourth mounting bracket fixed to the sea side of the levee, and the above Before the return plate is attached to the levee, a second connecting member that rotatably connects the upright piece of the third mounting bracket and the upright piece of the fourth mounting bracket in advance is provided. The mounting bracket is fixed to the bank by a first anchor bolt, and the fourth mounting bracket is fixed to the bank by a second anchor bolt after the top plate is mounted.

  By comprising in this way, the structural member of the fixture of a top plate and the fixture of a return plate can be comprised by the substantially 1st thru | or 4th attachment bracket, and a common structural member can be used. The top plate and the wave return plate can be attached to the dike.

  According to this invention, since it is configured as described above, the following effects can be obtained.

  (1) According to the invention described in claim 1, the base end side of the aluminum top plate is attached to the upper end portion of the dike, the top plate is extended toward the offshore side, and the joint is connected to the top end side of the top plate. Since the other end of the wave return plate to which one end is connected via the dam can be attached to the sea side of the levee, the overtopping structure can be easily and reliably assembled to the existing levee.

  (2) According to the invention described in claim 2, since the seawater collected on the top surface of the top plate flows on the downward slope surface and is drained to the sea side, in addition to the above (1), the seawater side Intrusion into can be prevented.

  (3) According to the invention described in claim 3, since seawater accumulated on the top surface of the top plate can be drained to the sea side through the drain hole, in addition to the above (1) and (2) Furthermore, it is possible to reliably prevent the intrusion of seawater into the land.

  (4) According to the inventions of claims 4 and 5, since the top plate can be attached to the dike in a state where the top plate is straddled on the upper end surface of the dike, in addition to the above (1), Furthermore, the top plate can be easily attached. In addition, seawater that is about to flow over the top plate and flow into the land side can be sent back to the sea side by the water return plate, so that intrusion of seawater into the land side can be prevented.

  (5) According to the inventions of the sixth, seventh, eighth, and ninth aspects, since a plurality of aluminum hollow extruded shapes can be joined together, a top plate and a wave return plate of arbitrary dimensions can be formed. In addition to the above (1) to (4), an optimum overtopping structure can be assembled according to various conditions such as when the existing embankment is uneven.

  (6) According to the inventions of claims 10, 11 and 12, the wave return plate can be displaced with respect to the top plate and attached to an arbitrary position on the sea surface side of the dike. In addition to 5), the overtopping structure can be reliably assembled according to the shape and conditions of the existing embankment. In this case, the component member of the joint is constituted by the substantially L-shaped first bracket and the second bracket, so that the top plate and the wave return plate are displaceably connected using the common component member. Therefore, the number of components can be reduced and the cost can be reduced (claim 12).

  (7) According to the invention of claim 13, the structural members of the top plate mounting tool and the wave return plate mounting tool can be configured by substantially L-shaped first to fourth mounting brackets, Since the top plate and the wave return plate can be attached to the dike using a common component, in addition to the above (1) to (6), the construction can be further facilitated and the number of components Can be reduced and the cost can be reduced.

  Hereinafter, the best embodiment of the overtopping prevention structure according to the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>
1 is a schematic perspective view showing a first embodiment of the overtopping prevention structure according to the present invention, FIG. 2 is a schematic side view of the overtopping prevention structure, and FIG. 3 is an enlarged view (a) of the I part of FIG. It is the enlarged view (b) of the II section, and the enlarged view (c) of the III section.

  In the wave overtopping prevention structure according to the present invention, the base end side is attached to the upper end portion of the levee 1, the aluminum top plate 2 extending toward the offshore side, and the tip portion of the top plate 2 via the joint 3. One end is connected, and the other end is mainly composed of an aluminum wave return plate 4 attached to the sea side of the levee 1.

  In this case, the upper surface of the top plate 2 is formed with a downward slope toward the offshore side, and the top plate 2 is provided with a drain hole 5. Thus, by forming the upper surface of the top plate 2 with a downward slope toward the offshore side, seawater accumulated on the upper surface of the top plate 2 flows on the downward slope surface and is drained to the sea side. Further, by providing the drainage hole 5 in the top plate 2, seawater accumulated on the top surface of the top plate 2 falls on the wave return plate 4 through the drainage hole 5, and is drained to the sea side from both right and left ends. The

  As shown in FIGS. 5 and 6, the top plate 2 and the wave return plate 4 are formed of a plurality of aluminum hollow extruded shapes 10 (hereinafter referred to as shapes 10) joined together. . In this case, the shape member 10 has two rectangular space portions 12 whose center is partitioned by the reinforcing partition wall 11, and at the corner portion of the one side wall 13 a and the upper plate 14 toward the side. A substantially arc-shaped fitting recess 15 that opens is formed, and a locking receiving piece 16 that extends outwardly via a locking step 16a is formed at the lower end of the side wall 13a. In addition, a substantially arc-shaped fitting ridge 18 that can be fitted to the fitting groove 15 is formed at the corner portion of the other side wall 13b and the lower plate 17, and at the lower end of the side wall 13b, A locking piece 19 is formed which has a locking claw portion 19a engageable with the locking step portion 16a provided on the shape member 10 to be joined, and is placed on the locking receiving piece 16. ing.

  In order to join the shape members 10 formed as described above, as shown by a two-dot chain line in FIG. 5, first, the other shape member is formed in the opening of the fitting recess 15 of the one shape member 10. The tip of 10 fitting ridges 18 is positioned. Next, while inserting and fitting the fitting protrusion 18 into the fitting groove 15, the other shape member 10 is rotated so as to be horizontal with the one shape member 10. The locking claw portion 19a of the other shape member 10 is engaged with the locking step portion 16a provided on the base end side of the locking receiving piece 16, and the locking piece 19 is placed on the locking receiving piece 16. In the placed state, the two shape members 10 are joined.

  Further, as shown in FIG. 6, the top plate 2 and the wave return plate 4 are formed with a narrow opening-like engagement groove 20 on a side wall 13c which is a joining end portion of the shape members 10 to be joined to each other. The seal packing 21 is fitted and fixed in each engagement recess 20. And the shape member 10 to be joined is butt-joined, and the top plate 2 and the wave return plate 4 are formed. In this case, the engaging groove 20 is provided on the upper side of the side wall 13c, and is formed in a narrow taper shape having a narrow opening 23 at the bottom of the groove 22 provided on the outer surface of the side wall 13c. . Further, the seal packing 21 is made of, for example, a synthetic rubber such as chloroprene rubber, and is fitted into an engagement groove 20 provided in the profile 10 as shown in FIG. A leg portion 24 having a hollow portion 24a and a hollow arc-shaped locking head portion 25 which is fitted into the concave groove 22 and slightly protrudes from the side wall 13c.

  The shape 10 formed as described above is formed, for example, to have a length of 2000 mm, a width of 200 mm, a height of 40 mm, or 50 mm, and a plurality of the shapes 10 have a length that can cover a range where overtopping occurs. The top plate 2 and the wave return plate 4 are configured by joining.

  The base end portion of the top plate 2 and the other end portion of the wave return plate 4 are attached to the sea side surface of the upper end portion of the levee 1 and the sea side surface below it by a fixture 6. In this case, as shown in FIGS. 3A, 3C and 4, the fixture 6 has a substantially U-shaped cross section that is attached and fixed to the base end portion of the top plate 2 by, for example, a blind rivet 7. A mounting member 30; a fixing member 32 having a fixing piece 31 fastened to the levee 1 by anchor bolts 8; bearings 34a provided at appropriate intervals in the mounting member 30 via notches 33; It is comprised with the pivot pin 35 which penetrates the bearing part 34b provided in 32 by the notch 33 through the notch 33 suitably. In this case, the attachment member 30 and the fixing member 32 are formed of an extruded shape made of aluminum, and the bearing portions 34a and 34b are appropriately spaced from the bulging arc portion formed in a part of the extruded shape. It is formed by cutting away. In addition, the fixture 6 may be formed in a piece shape and disposed at least at one end of the top plate 2 and the wave return plate 4 and the middle portion. In this way, when the drain hole 5 is formed on the top surface of the top plate 2 as described above, the seawater that has fallen on the return plate 4 from the drain hole 5 is generated between the return plate 4 and the bank. More drained to the sea side.

  In addition, the joint 3 that connects the tip of the top plate 2 and one end of the wave return plate 4 is mounted and fixed (covered) by, for example, a blind rivet 7 at the tip of the top 2 as shown in FIG. A first joint member 41 having a substantially U-shaped cross section that is attached and fixed) and a second joint having a substantially U-shaped cross section that is mounted and fixed (attached and fixed) by a blind rivet 7 to one end of the wave return plate 4. And a hinge pin 43 that rotatably connects the first joint member 41 and the second joint member 42. In this case, the first joint member 41 and the second joint member 42 are formed of an extruded shape member made of aluminum, similarly to the attachment member 30 of the fixture 6, and the first joint member 41 and the second joint member 42 are formed. The bearing portions 44a and 44b provided on the second joint member 42 are provided at appropriate intervals through notches (not shown), and the hinge pin 43 is penetrated in a state of being coaxially arranged. . Thereby, the top plate 2 and the wave return plate 4 are connected to each other by the joint 3 so as to be rotatable. In this case, the joint 3 is mounted (attached) over the entire length of the top plate 2 and the wave return plate 4. However, the joint 3 is formed in a piece shape, and at least the top plate 2 and the wave return plate 4. You may arrange | position in one place of both ends and an intermediate part. In this case, the opening where the joint 3 is not located at the tip of the top plate 2 and one end of the wave return plate 4 is closed by a cap member (not shown) having a substantially U-shaped cross section.

  The top plate 2 and the wave return plate 4 configured as described above are pivotally connected to each other by a joint 3 in advance in a factory or the field, and the base end portion of the top plate 2 and the wave return plate 4 are connected to each other. A fixture 6 is attached (attached) to the other end. And when attaching to the dike 1, the fixing piece 31 of the fixture 6 with which the base end part of the top plate 2 was attached is first fixed to the sea surface side of the upper end part of the dike 1 with the anchor bolt 8. FIG. As the anchor bolt 8, a chemical anchor bolt or the like is used. At this time, the wave return plate 4 is rotatable with respect to the top plate 2 via the joint 3, and does not hinder the mounting work of the top plate 2. After the top plate 2 is attached to the levee 1, the fixing piece 31 of the fixture 6 attached to the other end of the wave return plate 4 is fixed to the sea surface side below the levee 1 by anchor bolts 8, and the overtopping prevention structure Is attached to the place where overtopping of levee 1 occurs. Thereby, the top plate 2 and the wave return plate 4 can be easily attached to the existing levee 1 in a state where the top plate 2 is inclined downward toward the offshore side. The height from the lower end, that is, the other end of the wave return plate 4 to the top plate 2 is preferably about 1 m from the results obtained by experiments.

Second Embodiment
FIG. 7 is a schematic perspective view showing a second embodiment of the overtopping prevention structure according to the present invention, and FIG. 8 is a schematic side view of the overtopping prevention structure of the second embodiment (a) and an enlargement of the Y portion of (a). Sectional views (b) and 9 are an enlarged view (a) of the IV part, an enlarged view (b) of the V part and an enlarged view (c) of the VI part of FIG.

  The overtopping prevention structure of the second embodiment is a case where a plurality of aluminum extruded extruded members 10A having a length within a range to prevent overtopping are joined to form the top plate 2A and the wave return plate 4A. In the overtopping prevention structure of the second embodiment, the base end portion of the top plate 2 is attached to the bank 1 by the fixture 6A, and the tip end portion of the top plate 2A and one end portion of the wave return plate 4A are connected by the joint 3A. In addition, the other end portion of the wave return plate 4A is attached to the levee 1 with the fixture 6B.

  In this case, a hollow extruded shape member 10A (hereinafter referred to as a shape member 10A) constituting the top plate 2A and the wave return plate 4A has two rectangular space portions 12 that are partitioned by a reinforcing partition wall 11 at the center. A fitting recess 15A having a substantially concave arc shape in cross section is formed on the side wall 13d of one profile 10A to be joined, and the fitting recess 15A can be fitted on the side wall 13e of the other profile 10A. A fitting protrusion 18A having a substantially convex arc shape in cross section is formed. By configuring in this way, the fitting concave strips 15A and the fitting convex strips 18A can be fitted together to join the shape members 10A (see FIG. 8).

  As shown in FIG. 9B, the joint 3A is rotatably fitted in a fitting concave strip 15A having a substantially concave arc shape in cross section formed at the tip of the top plate 2A. The first bulging engagement convex portion 51 having a convex arc shape and the fitting recess 15A having a substantially concave arc shape in cross section formed at one end of the wave return plate 4A are rotatably fitted and substantially have a cross section. It is formed by a joint member 50 made of an aluminum die-cast or extruded shape member having a convex arc-shaped second bulging engagement convex portion 52. The top plate 2A and the wave return plate 4A can be rotatably connected using the joint 3A formed in this way. In this case, the first and second bulging engagement convex portions 51 and 52 are formed solid, and the strength of the connecting portion between the top plate 2A and the wave return plate 4A is achieved.

  The fixture 6A is formed of an aluminum extruded profile, and as shown in FIG. 9A, a horizontal piece 55a placed on the upper end surface of the dike 1 and an upper end surface of the dike 1 It consists of an angled base 55 that is in contact with the adjacent sea side and is made up of a vertical piece 55b that is fastened by an anchor bolt 8, and an attachment 56 that projects outward from the upper end of this angled base 55, A mounting concave portion 56a having a substantially concave arc-shaped cross section is formed on the distal end surface of the mounting portion 56, and a fitting convex strip 18A having a substantially convex arc-shaped cross section formed on the base end surface of the top plate 2A can be fitted therein. . Using the fixture 6A formed in this way, the base end portion of the top plate 2A can be attached so as to be rotatable in the vertical direction, and the top plate 2A can be formed with a downward slope toward the offshore side. Note that the attachment 6A may be formed in a piece shape and disposed at least at one end portion and an intermediate portion of the top plate 2A.

  Further, the fixture 6B is formed of an aluminum die-cast or extruded profile, and is brought into contact with the sea surface side of the dike 1 and fastened by an anchor bolt 8 as shown in FIG. The fixing portion 57 and an attachment portion 58 that protrudes in an inclined manner from the side surface of the upper end portion of the fixing portion 57, and the cross section formed on the other end surface of the wave return plate 4 </ b> A is substantially convex on the tip surface of the attachment portion 58. A mounting recess 58a having a substantially concave arc-shaped cross section, into which the arc-shaped fitting protrusion 18A can be fitted, is formed. In addition, a concave portion 57 a for accommodating the nut 8 a of the anchor bolt 8 is formed on the surface of the fixing portion 57. Using the fixture 6B formed in this way, the other end of the wave return plate 4A can be rotatably attached. Note that the fixture 6B may be formed in a piece shape and disposed at least at one end of the both ends and the middle of the wave return plate 4A.

  In addition, it is preferable to provide a drain hole (not shown) in the shape member 10A constituting the top plate 2A, as in the first embodiment. Thereby, the seawater collected on the top plate 2A can be drained to the sea side through the drain hole.

  The top plate 2A and the wave return plate 4A are pivotally connected to each other in advance by a joint 3A at a factory or the site, and are attached to the base end portion of the top plate 2A and the other end portion of the wave return plate 4A. Tools 6A and 6B are rotatably mounted. And when attaching to the dike 1, the vertical piece 55b of the fixture 6A with which the base end part of the top plate 2A was mounted | worn is first fixed to the sea surface side of the upper end part of the dike 1 with the anchor bolt 8. FIG. At this time, since the wave return plate 4A is rotatable with respect to the top plate 2 via the joint 3A, the wave return plate 4A can be lifted upward, and does not interfere with the attaching operation of the top plate 2A. After the top plate 2A is attached to the levee 1, the fixing portion 57 of the fixture 6B attached to the other end portion of the wave return plate 4A is fixed to the sea surface side below the levee 1 by anchor bolts 8 to prevent overtopping. Is attached to the place where overtopping of levee 1 occurs.

  In the second embodiment, the other parts are the same as those in the first embodiment, and a description thereof will be omitted.

<Third Embodiment>
FIG. 10 is a schematic perspective view showing a third embodiment of the overtopping prevention structure according to the present invention, FIG. 11 is a schematic side view of the overtopping prevention structure of the third embodiment, and FIG. 12 is a top plate in the third embodiment. FIG. 13 is an exploded perspective view showing the top plate 2B and the water return plate 60 in the third embodiment, and FIG. 14 is an enlarged view (a) and VIII of the VII portion in FIG. It is an enlarged view (b) of a part.

  The third embodiment is a case where the top plate 2B can be easily attached to the levee 1 and the intrusion of seawater to the land side can be more reliably prevented.

  In this case, the base end side of the top plate 2B is attached to the upper end surface of the levee 1 across the liners 9a and 9b, and the top surface of the top plate 2B is attached to the base end portion of the top plate 2B. A water return plate 60 made of an extruded shape member made of aluminum and having an intrusion prevention wall 61 standing upward is mounted.

  The top plate 2B is formed by a plurality of long, for example, 1 m sections 10 having the same cross-sectional shape as the hollow extruded section 10 in the first embodiment, and is formed by a joint structure similar to that in the first embodiment. ing. Two through-holes 62a into which the anchor bolts 8 can be inserted into the space portion 12 at both ends and intermediate positions (two positions are shown in the figure) at the base end portion of the top plate 2B formed in this way. A spacer 62 is inserted, and is fastened to the upper end portion of the levee 1 by an anchor bolt 8 that penetrates the profile member 10, the spacer 62, and the liners 9a and 9b. At this time, of the two liners 9a and 9b disposed on the upper end surface of the levee 1, the liner 9a disposed on the land side is slightly higher than the liner 9b disposed on the sea side, and the top plate 2B is placed on the offshore side. Downhill toward

  The water return plate 60 is formed of an aluminum extruded profile, and the intrusion prevention wall 61 whose vertical surface is bent concavely toward the sea side and the sea side surface of the intrusion prevention wall 61 are parallel to each other. It consists of a pair of horizontal attachment pieces 63a, 63b extending in the direction. The water return plate 60 formed in this manner is fixed by, for example, the blind rivet 7 in a state where the base end portion of the top plate 2B is fitted between the horizontal mounting pieces 63a and 63b. In addition, when fixing the water return plate 60 to the top plate 2B in a factory or the like, it may be fixed by a through bolt instead of the blind rivet 7.

  In addition, the wave return plate 4B is comprised by the some shape 10 which has the same cross-sectional shape as the hollow extrusion shape material 10 of 1st Embodiment, and is formed by the joining structure similar to 1st Embodiment.

  The joint 3B that connects the top end portion of the top plate 2B and the one end portion of the wave return plate 4B formed as described above is formed of an extruded shape member made of aluminum. As shown in FIG. 14 (a), the joint 3B includes an upper fitting portion 80 composed of a pair of parallel horizontal pieces 80a and 80b into which the tip portion of the top plate 2B can be fitted, and a wave return plate 4B. A lower inclined fitting portion 81 composed of a pair of parallel inclined pieces 81 a and 81 b into which one end portions can be inserted, a horizontal piece 80 a above the upper fitting portion 80, and an inclined piece outside the lower inclined fitting portion 81. The internal connection which connects the circular-shaped external connection part 82 which connects 81a, the horizontal piece 80b below the upper fitting part 80, and the inclination piece 81b inside the lower inclination fitting part 81 at an angle of 45 degrees, for example. It consists of a part 83 and a partition wall 84 that connects between the internal connection part 83 and the external connection part 82.

  In the joint 3B formed in this way, the horizontal piece 80a and the top plate 2B are fixed by the blind rivet 7 with the top end portion of the top plate 2B being inserted into the upper fitting portion 80, and the lower inclined fitting is also performed. In a state where one end portion of the wave return plate 4 </ b> B is fitted into the joint portion 81, it is fixed by, for example, the blind rivet 7. In this case, since the blind rivet 7 is attached only to the outside of the joint 3B, it is preferable to increase the number. When the joint 3B is fixed to the wave return plate 4B at a factory or the like, it may be fixed by a through bolt instead of the blind rivet 7. In addition, in the case of fixing with a bolt instead of the blind rivet 7, a bolt or the like is inserted from the outside and protrudes inward through a spacer or the like in the hollow portion of the tip portion of the top plate 2B and one end portion of the wave return plate 4B. It is preferable to fasten the top plate 2B, the wave return plate 4B, and the joint 3B by fastening a nut to the front end portion.

  The fixture 6C for fixing the other end of the wave return plate 4B to the levee 1 is formed of, for example, aluminum die-casting or extruded profile, and as shown in FIG. The fixed plate portion 71 is brought into contact with the anchor bolt 8 and fastened by the anchor bolt 8, and the inclined mounting portion 72 protrudes in an inclined manner from the side surface of the upper end portion of the fixed plate portion 71. A pair of inclined pieces 73 into which the other end of 4B can be inserted is formed.

  In the fixture 6 formed in this way, the inclined piece 73 and the wave return plate 4B are fixed by, for example, the blind rivet 7 in a state where the other end portion of the wave return plate 4B is fitted into the inclination attachment portion 72. In addition, when fixing the fixture 6C to the wave return plate 4B in a factory or the like, it may be fixed by a through bolt instead of the blind rivet 7. In addition, the fixture 6C may be formed in a piece shape and disposed at least at one end of the both ends and the middle of the wave return plate 4B.

  Before attaching the overtopping prevention structure of the third embodiment configured as described above to the bank 1, the top plate 2 </ b> B is formed by joining a plurality of the sections 10 having the sections 10 with the spacers 62 embedded in the factory. At the same time, after joining the plural shape members 10 to form the wave return plate 4B, the water return plate 60 is fixed to the base end portion of the top plate 2B, and the joint 3C is fixed to one end portion of the wave return plate 4B. At the same time, the fixture 6C is fixed to the other end.

  And when attaching to the dike 1, first, the base end part of the top plate 2B is straddled on the upper end surface of the dike 1 through the liners 9a and 9b, and penetrates the profile 10, the spacer 62, and the liners 9a and 9b. The base end portion of the top plate 2 </ b> B is fastened to the upper end portion of the levee 1 with the anchor bolts 8. At this time, as described above, of the two liners 9a and 9b disposed on the upper end surface of the levee 1, the liner 9a disposed on the land side is slightly higher than the liner 9b disposed on the sea side, The plate 2B is inclined downward toward the offshore side.

  Next, the horizontal plate 80a and the top plate 2B are moved in a state in which the wave return plate 4B to which the joint 3 and the fixture 6C are fixed is moved and the top end portion of the top plate 2B is inserted into the upper fitting portion 80 of the joint 3C. Are fixed by blind rivets 7. In addition, the fixing plate portion 71 of the fixture 6C mounted on the other end portion of the wave return plate 4B is fixed to the sea surface side below the levee 1 by the anchor bolts 8, and the wave overtopping prevention structure is generated where overtopping of the levee 1 occurs. Attach to.

  In addition, in 3rd Embodiment, since another part is the same as 1st Embodiment, description is abbreviate | omitted.

<Fourth embodiment>
FIG. 15 is a schematic side view showing a fourth embodiment of the overtopping prevention structure according to the present invention, and FIG. 16 is an enlarged cross-sectional view (IX) of (a) and (a) showing the joint portion of the top plate in the fourth embodiment. FIG. 17B is a schematic front view of the overtopping prevention structure of the fourth embodiment.

  In the fourth embodiment, the top plate 2C and the wave return plate 4B are joined differently from the first to third embodiments, the joint 3E between the top plate 2C and the wave return plate 4C, the top plate 2C and the wave return plate 4B. This is a case where the fixtures 6F and 6G of the return plate 4C and the levee 1 are configured using the same constituent members so that the construction can be facilitated, the number of parts can be reduced, and the cost can be reduced.

  The top plate 2C and the wave return plate 4C in the fourth embodiment are formed of the same aluminum alloy hollow extruded shape member 10C and have the same joining structure. A joining structure of the hollow extruded shape member 10C (hereinafter referred to as a shape member 10C) will be described.

  The shape member 10 </ b> C is partly formed in the same manner as the shape member 10 of the first embodiment, and has two rectangular space portions 12 that are partitioned by the reinforcing partition wall 11 at the center, and is joined to each other. A first engagement piece 27a having an inward engagement groove 26a and a second engagement piece 27b having an outward engagement protrusion 26b are formed to face each other at one of the joining end portions of the profile 10C. Then, at the joint end of the other shape member 10C, a first engagement piece 27a having an inward engagement groove 26a that can be fitted to the outward engagement protrusion 26b, and an inward engagement groove A second engagement piece 27b having an outward engagement protrusion 26b that can be fitted to 26a is formed facing the second engagement piece 27b. The shape member 10C constituting the top plate 2C is formed to have a length of about 2.3 m, and an uneven strip 28 is formed on the surface of the upper plate 14. In addition, in this embodiment, although the drain hole is not provided, it is also possible to provide.

  To join the shape members 10C formed as described above, one shape member 10C is shifted up and down with respect to the other shape member 10C (the right shape member 10C in FIG. 16 is shifted upward). In the state), the outward engagement protrusion 26b is fitted into the inward engagement groove 26a of the other shape member 10C, and at the same time, the outward engagement protrusion of the other shape member 10C is engaged with the inward engagement groove 26a. The strips 26b are fitted so that one profile 10C is level with the other profile 10C. Then, as shown in FIG. 16, a wedge member is laterally inserted into a space 27c between the second engagement pieces 27b in a state where the inward engagement protrusions 26a and the outward engagement protrusions 26b are fitted. 29 is inserted and the shape members 10C are joined together. Thus, the strong top plate 2C can be comprised by joining the shape members 10C.

  The wedge member 29 may be inserted from both ends or may be inserted from one side. In addition, the wedge member 29 may have a long length, or may be inserted so that the short length is sequentially pushed. Further, the wedge member 29 is preferably the length over the entire length of the shape member 10C, but may be a certain length from both ends if there is no problem in the connection strength between the shape members 10C.

  In addition, since the corrugated plate 4C similarly joins the shape members 10C, the strength of the corrugated plate 4C can be sufficient. The length of the wave return plate 4C is about 67 cm, and four sets of two shape members 10C joined at an appropriate interval, for example, 12 mm, are joined to the top plate 2C via a joint 3E described later. It is connected to the pivotable.

  As shown in FIG. 15, the joint 3 </ b> E according to the fourth embodiment includes a substantially L-shaped first bracket 91 in which a fixing piece 90 is fixed to a lower surface on the front end side of the top plate 2 </ b> C by a fixing bolt 7 </ b> A, A substantially L-shaped second bracket 92 to which a fixing piece 90 is fixed by a fixing bolt 7A on one side surface of the plate 4C, an upright piece 93a of the first bracket 91, and an upright piece 93b of the second bracket 92. And a connecting bolt 94 that is a connecting member that rotatably connects the two. In this case, the first and second brackets 91 and 92 are made of an aluminum alloy. The connecting bolt uses a stainless steel member.

  By comprising in this way, the top plate 2C and the wave return plate 4C are mutually connected by the coupling 3E so that rotation is possible. In this case, the joint 3E is formed in a piece shape, and is disposed at both ends of the top plate 2C and at three positions in the middle (see FIG. 17).

  The base end portion of the top plate 2C is attached to the upper end portion of the levee 1 by the first fixture 6F, and the other end portion of the wave return plate 4C is attached to the sea side of the levee 1 by the second fixture 6G. ing.

  In this case, the first fixture 6F includes a substantially L-shaped first mounting bracket 96A in which the fixing piece 95 is fixed to the lower surface of the base end portion of the top plate 2C by the fixing bolt 7A, and the sea side of the dike 1 In addition, the substantially L-shaped second mounting bracket 96B to which the fixing piece 95 is fixed by the first anchor bolt 8A, and the upright piece of the first mounting bracket 96A before the top plate 2C is attached to the levee 1 in advance. 97a and the upright piece 97b of the 2nd mounting bracket 96B are comprised by the 1st connection bolt 94A which is a 1st connection member which connects rotatably.

  The second fixture 6G has a substantially L-shaped third mounting bracket 96C fixed to the other end side surface of the wave return plate 4C by a fixing bolt 7A, and a fixed piece on the sea side of the levee 1 95 is fixed by the second anchor bolt 8B, and a substantially L-shaped fourth mounting bracket 96D, and the upright piece 97c of the third mounting bracket 96C and the third mounting bracket 96C are installed in advance before the wave return plate 4C is attached to the levee 1. 4 and the second connecting bolt 94B, which is a second connecting member that rotatably connects the upright piece 97d of the mounting bracket 96D.

  As described above, the second mounting bracket 96B of the first fixture 6F attached to the base end portion of the top plate 2C is fixed to the levee 1 by the first anchor bolt 8A, and the wave return plate 4C The fourth attachment bracket 96D of the second attachment 6G attached to the other end is fixed to the levee 1 with the second anchor bolt 8B after the top plate 2C is attached. The first and second anchor bolts 8A and 8B are chemical anchor bolts such as stainless steel that have high corrosion resistance.

  The top plate 2C and the wave return plate 4C configured as described above are pivotally connected to each other by a joint 3E in advance in a factory or the field, and the base end of the top plate 2C and the wave return plate 4C are connected to each other. First and second attachments 6F and 6G are attached (attached) to the other end. When attaching to the dike 1, first, the fixing piece 95 of the second mounting bracket 96B of the first fitting 6F attached to the base end of the top plate 2C is attached to the dike 1 by the first anchor bolt 8A. Fix to the sea level side of the upper end. At this time, the wave return plate 4C is rotatable with respect to the top plate 2C via the joint 3E, and does not hinder the mounting work of the top plate 2C. After the top plate 2C is attached to the levee 1, the fixed piece 95 of the fourth mounting bracket 96D of the second fixture 6G attached to the other end of the wave return plate 4C is attached to the levee 1 by the second anchor bolt 8B. The wave overtopping prevention structure is attached to the place where overtopping of the dike 1 occurs. Thereby, the top plate 2C and the wave return plate 4C can be easily attached to the existing levee 1 in a state where the top plate 2C is inclined downward toward the offshore side.

  In the fourth embodiment, the other parts are the same as those in the first embodiment, and therefore the same parts are denoted by the same reference numerals and description thereof is omitted.

<Other embodiments>
(1) In the first embodiment, the attachment 6 is pivoted through the attachment member 30 having a substantially U-shaped cross section, the fixing member 32, the bearing portion 34a of the attachment member 30, and the bearing portion 34b of the fixing member 32. Although the case where it comprised with the support pin 35 was demonstrated, the fixture does not necessarily need to be such a structure. For example, as shown in FIG. 18A, the fixture 6D fixed to the base end portion of the top plate 2 is attached to one of the attachment member 30 having a substantially U-shaped cross section and a lower piece of the attachment member 30. The piece 36 a may be fixed, and the other piece 36 b may be configured with a hinge 36 fixed to the sea side of the levee 1 by the anchor bolt 8. Further, as shown in FIG. 18 (c), one piece 36a is fixed to the other end portion of the wave return plate 4 and the other piece 36b of the fixture 6E fixed to the other end portion of the wave return plate 4. May be formed by a hinge 36 fixed to the sea side of the levee 1 by anchor bolts 8. In this case, it is better to fix the other piece 36 b of the hinge 36 to the sea side of the levee 1 through the fixing block 37. The reason is that the sea side of the existing levee 1 has many irregularities depending on the sea tide and wave conditions, and the fixed block 37 can be used to firmly fasten the piece 36b of the hinge 36. is there.

  In the first embodiment, the joint 3 is attached to one end of the wave return plate 4 and the first joint member 41 having a substantially U-shaped cross section mounted and fixed (attached / fixed) to the tip of the top plate 2. A second joint member 42 having a substantially U-shaped cross section to be mounted / fixed (attached / fixed), and a first joint member 41 and a hinge pin 43 that rotatably couples the second joint member 42. Although described above, the joint does not necessarily have such a structure. For example, as shown in FIG. 18B, the hinge 3D is replaced with a hinge 36 having pieces 36a and 36b fixed to the first joint member 41 and the second joint member 42, respectively. May be.

  (2) The structure of the joint 3A in the second embodiment and the joint 3B in the third embodiment may be replaced with the structure of the joint 3 in the first embodiment, or conversely, the joint 3 in the first embodiment. The structure may be replaced with the structure of the joint 3A in the second embodiment or the joint 3B in the third embodiment.

  Further, the structure of the fixtures 6A and 6B in the second embodiment and the fixture 6C in the third embodiment may be replaced with the structure of the fixture 6 in the first embodiment, or conversely in the first embodiment. You may replace the structure of the fixture 6 with the structure of the fixtures 6A and 6B in 2nd Embodiment, or the fixture 6C in 3rd Embodiment.

  (3) The structure of the joints 3, 3A to 3D may be the same structure as the joint 3E of the fourth embodiment. Further, the structures of the fixtures 6, 6A to 6C of the first to third embodiments may be the same as the structures of the first fixture 6F and the second fixture 6G of the fourth embodiment.

  (4) Although the example using the blind rivet is shown in each of the above embodiments, other connecting means such as a bolt and a nut can be used instead of the brine and the rivet.

It is a schematic perspective view which shows 1st Embodiment of the overtopping prevention structure which concerns on this invention. It is a schematic side view of the overtopping prevention structure of the first embodiment. FIG. 3 is an enlarged view (a) of the I part, an enlarged view (b) of the II part, and an enlarged view (c) of the III part in FIG. 2. It is a disassembled perspective view of the joint in a 1st embodiment. It is an expanded sectional view which shows the junction part of the top plate and wave return plate in this invention. It is an expanded sectional view (b) of the X section of (a) and (a) which shows another joined part of the top plate and wave return plate in this invention. It is a schematic perspective view which shows 2nd Embodiment of the overtopping prevention structure which concerns on this invention. It is a schematic side view (a) of the overtopping prevention structure of 2nd Embodiment, and the expanded sectional view (b) of the Y section of (a). It is the enlarged view (a) of the IV section of Drawing 8, the enlarged view (b) of the V section, and the enlarged view (c) of the VI section. It is a schematic perspective view which shows 2nd Embodiment of the overtopping prevention structure which concerns on this invention. It is a schematic side view of the overtopping prevention structure of 3rd Embodiment. It is an enlarged side view which shows the attaching part of the top plate in 3rd Embodiment. It is a disassembled perspective view which shows the top plate and water return plate in 3rd Embodiment. It is the enlarged view (a) of the VII part of FIG. 11, and the enlarged view (b) of the VIII part. It is a schematic side view which shows 4th Embodiment of the overtopping prevention structure which concerns on this invention. It is sectional drawing (b) which follows the IX-IX line of the expanded sectional view (a) and (a) which shows the junction part of the top plate in 4th Embodiment. It is a schematic front view of the overtopping prevention structure of 4th Embodiment. The enlarged view (a) of the attachment part of the top plate in 5th Embodiment of the overtopping prevention structure which concerns on this invention, the enlarged view (b) of the joint part of a top plate and a return plate, and the enlarged view of the attachment part of a return plate (C).

Explanation of symbols

1 Levee 2, 2A, 2B, 2C Top plate 3, 3A, 3B, 3D, 3E Joint 4, 4A, 4B, 4C Corrugated plate 5 Drain hole 6, 6A, 6B, 6C, 6D, 6E, 6F, 6G Fixture 8 Anchor bolt 8A First anchor bolt 8B Second anchor bolt 10, 10A, 10C Hollow extruded profile 13a, 13b, 13c, 13d, 13e Side wall 15, 15A Fitting groove 18, 18A Fitting ridge 20 engagement groove 21 seal packing 26a inward engagement groove 26b outward engagement protrusion 27a first engagement piece 27b second engagement piece 27c space 29 wedge member 41 first joint member 42 second Joint member 43 hinge pin 50 joint member 51 first bulge engagement convex portion 52 second bulge engagement convex portion 60 water return plate 61 intrusion prevention wall 80 upper fitting portion 81 lower inclined fitting portion 91 first bracket 92 2nd Brackets 93a, 93 b standing piece 94,94A, 94B connecting bolts (coupling members)
96A, 96B, 96C, 96D First, second, third and fourth mounting brackets 97a to 97d

Claims (13)

  A base end side is attached to the upper end of the dike, and an aluminum top plate extending toward the offshore side is connected to one end of the top plate through a joint, and the other end is connected to the sea of the revetment. An overtopping prevention structure comprising an aluminum wave return plate attached to a side surface. In the overtopping prevention structure according to claim 1,
An overtopping prevention structure characterized in that the top surface of the top plate is formed with a downward slope toward the offshore side. In the overtopping prevention structure according to claim 1 or 2,
A wave overtopping prevention structure characterized in that a water drainage hole is provided in the top plate. In the overtopping prevention structure according to any one of claims 1 to 3,
Attach the base end side of the top plate across the upper end surface of the levee, and attach an aluminum water return plate with an intrusion prevention wall standing above the top surface of the top plate to the base end of the top plate An overtopping prevention structure characterized by that. In the overtopping prevention structure according to claim 4,
An overtopping prevention structure, wherein the infiltration prevention wall of the water return plate is bent concavely toward the sea side. In the overtopping prevention structure according to any one of claims 1 to 5,
A wave overtopping prevention structure, wherein the top plate and the wave return plate are formed of a plurality of aluminum hollow extruded shapes joined to each other. In the overtopping prevention structure according to claim 6,
A fitting groove is formed on one of the joining end portions of the top plate and the wave return plate that are joined to each other, and a fitting protrusion that can be fitted to the fitting groove is formed on the other. An overtopping prevention structure characterized by In the overtopping prevention structure according to claim 6 or 7,
The top plate and the top plate to be joined are formed by forming a narrow opening-like engagement groove at the joint end of the top plate and the wave return plate to be joined to each other, and fitting and fixing a seal packing in each engagement groove. And a wave overtopping prevention structure characterized in that the wave return plates are butt-joined to each other. In the overtopping prevention structure according to claim 6 or 7,
A first engagement piece having an inward engagement groove on one of the joining ends of the top plate and the wave return plate to be joined together, and a second engagement piece having an outward engagement protrusion. The first engagement piece is formed oppositely and has an inward engagement groove that can be fitted to the outward engagement protrusion, and can be fitted to the inward engagement groove. Both second engagement members in a state where the second engagement pieces having the outward engagement protrusions are formed to face each other and the inward engagement protrusions and the outward engagement protrusions are fitted to each other. A wave overtopping prevention structure, characterized in that a wedge member is inserted into a space between joint pieces. In the overtopping prevention structure according to any one of claims 1 to 9,
The joint includes a first joint member made of aluminum that is attached to the tip of the top plate, a second joint member that is attached to one end of the wave return plate, and the first joint member and the second joint. A wave overtopping prevention structure comprising a hinge pin that rotatably connects members. In the overtopping prevention structure according to any one of claims 1 to 9,
The joint has a first bulging engagement convex portion that is rotatably fitted in a concave arc-shaped first fitting groove formed at the tip of the top plate, and one end of the wave return plate. A second bulging engagement convex portion that is rotatably fitted in the formed concave arc-shaped second fitting recess, and is formed of an aluminum joint member having a second bulging engagement convex portion. Overtopping prevention structure. In the overtopping prevention structure according to any one of claims 1 to 9,
The joint includes a substantially L-shaped first bracket that is fixed to the lower surface on the front end side of the top plate, a substantially L-shaped second bracket that is fixed to one side surface of the return plate, and the first An overtopping prevention structure comprising: a connecting member that rotatably connects the upright piece of the bracket and the upright piece of the second bracket. In the overtopping prevention structure according to any one of claims 1 to 3 or 6 to 12,
A first fixture for attaching the base end of the top plate to the upper end of the levee; and a second fixture for attaching the other end of the return plate to the sea side of the levee;
The first fixture includes a substantially L-shaped first mounting bracket that is secured to the lower surface of the base end portion of the top plate, and a substantially L-shaped second attachment that is secured to the sea side of the levee. A bracket and a first connecting member that rotatably connects the upright piece of the first mounting bracket and the upright piece of the second mounting bracket in advance before the top plate is attached to the levee;
The second fixture includes a substantially L-shaped third mounting bracket that is fixed to the side surface of the other end portion of the wave return plate, and a substantially L-shaped fourth bracket that is fixed to the sea side of the levee. From the mounting bracket and the second connecting member that rotatably connects the upright piece of the third mounting bracket and the upright piece of the fourth mounting bracket in advance before the wave return plate is attached to the bank. Become
The second mounting bracket is fixed to the levee by a first anchor bolt, and the fourth mounting bracket is fixed to the levee by a second anchor bolt after the top plate is mounted. A characteristic wave overtopping prevention structure.

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