JP5159692B2 - 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 embankment has been set to an appropriate height because the landscape becomes worse and the installation cost increases if the height is too high.

  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).

  In addition, as a structure that protects the sidewalk overhanging from the shore from the wave that rises from below, the upper end is attached to the protruding tip of the E-shaped girder on the underside of the sidewalk, and the lower end is embedded and fixed in quay concrete There is known a wave breaker wall that is pasted on the front surface of a floor support girder so as to cover the entire lower surface of the sidewalk with the corrugated groove of the corrugated plate parallel to the sidewalk surface (for example, Patent Document 5). reference).

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) Japanese Utility Model Publication No. 51-2919 (Utility Model Registration Request, FIGS. 1 and 3)

  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.

  In addition, the structure described in Patent Document 5 has a corrugated plate mounted on the front surface of an inclined floor support girder in which an upper end is attached to the protruding end of the underside of the sidewalk and the lower end is embedded and fixed in quay concrete. In addition to fixing with a nut, the upper side of the corrugated plate is bolted to the tip of the sidewalk girder and the lower side of the corrugated plate is bolted to the quay concrete. Moreover, the structure described in Patent Document 5 has a problem in that the members constituting the sidewalk and the wave barrier are different, and many components are used, so that the structure is complicated and assembly / construction is troublesome.

  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-described problem, the first wave overtopping prevention structure includes a top plate made of aluminum, the base end side of which is attached to the upper end portion of the levee via the first fixture, and extends toward the offshore side. An aluminum wave return plate, one end of which is connected to the front end side of the top plate via a joint, and the other end is attached to the sea side of the levee via a second fixture, The top plate and the corrugated plate are formed of a single aluminum extruded shape whose longitudinal direction is disposed along the bank (claim 1).

  By comprising in this way, a top plate and a wave return board can be formed with the same aluminum extruded shape. In addition, a base plate side of an aluminum top plate is attached to the upper end of the levee, the top plate is extended toward the offshore side, and one end is connected to the top side of the top plate via a joint. Can be attached to the seaside of the dike. Therefore, the overtopping structure can be assembled on the existing dike.

  In the invention described in claim 1, it is preferable that the top plate and the wave return plate are formed of a hollow extruded shape member having a plurality of hollow portions defined by a plurality of connecting ribs (invention 2). In this case, among the connecting ribs in the top plate and the wave return plate, the first and second mounting tools and the adjacent connecting ribs in the vicinity of the joint mounting portion are connected between the first and second mounting tools and It is preferable to form a structure for forming an engagement receiving portion of a fixing member for fixing the joint.

  By comprising in this way, a top plate and a wave return board can be made lightweight, and while being able to carry easily to the installation site, the assembly | attachment on site can be made easy. In this case, among the connecting ribs on the top plate and the wave return plate, the first and second mounting tools and the adjacent connecting ribs in the vicinity of the mounting portions of the first and second mounting tools and the mounting portion of the joint are connected to each other. By forming the engagement receiving portion of the fixing member for fixing the joint, the first and second attachments and the joint can be securely attached and can be strengthened.

  According to a fourth aspect of the present invention, in the overtopping prevention structure according to any one of the first to third aspects, the joint includes a substantially L-shaped first bracket fixed to the lower surface of the top side of the top plate, and a wave A substantially L-shaped second bracket fixed to one side surface of the return plate, and a connecting member that rotatably connects the upright piece of the first bracket and the upright piece of the second bracket. It is characterized by that.

  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. be able to.

  According to a fifth aspect of the present invention, in the overtopping prevention structure according to any one of the first to fourth aspects, the first fixture is a substantially L-shaped first fixed to the lower surface of the base end portion of the top plate. 1 mounting bracket, a substantially L-shaped upper mounting bracket that is fixed to the sea side of the levee, and an upright piece of the first mounting bracket and an upper mounting bracket in advance before the top plate is attached to the levee. A second connecting bracket that is fixed to the side surface of the other end portion of the wave return plate. A substantially L-shaped lower mounting bracket fixed to the sea side of the levee, and an upright piece of the second mounting bracket and an upright piece of the lower mounting bracket before the wave return plate is attached to the levee. And a second connecting member that rotatably connects the upper part The attached bracket is fixed to the levee by a first anchor bolt, and the lower mounting bracket is fixed to the levee by a second anchor bolt after the top plate is attached.

  By configuring in this manner, the structural members of the top plate mounting tool and the wave return plate mounting tool can be configured by a substantially L-shaped mounting bracket. A return plate can be attached to the embankment.

  The second wave overtopping prevention structure according to the present invention includes an aluminum top plate that is attached to the upper end portion of the levee via a first fixture and extends toward the offshore side, and the ceiling. An aluminum wave return plate having one end connected to the tip end side of the plate via a joint and the other end attached to the sea side of the levee via a second fixture, and the top plate And a plurality of aluminum extruded profiles whose longitudinal directions are disposed along the bank and joined together, and a plurality of aluminum extrusions on the bottom surface of the top plate and the side of the bank of the wave returning plate It is comprised by the substantially L-shaped girder straddling the shape material, and the fixing member which fixes the said extrusion shape material and a girder material (Claim 6), It is characterized by the above-mentioned.

  The invention according to claim 7 is the overtopping prevention structure according to claim 6, wherein the aluminum extruded profile constituting the top plate and the return plate is formed by a plurality of hollow portions partitioned by a plurality of connecting ribs; It is formed by a hollow extruded shape member having a narrow groove-like recessed groove portion that slidably accommodates the head portion of the fixing bolt constituting the fixing member.

  By configuring in this way, it is possible to fix the top plate, the wave return plate, and the girder with a fixing bolt in which the head is slidably accommodated in the narrow groove-shaped recessed groove provided in the girder. it can.

  Further, the invention according to claim 8 is the wave overtop prevention structure according to claim 6 or 7, wherein the girder material includes a girder material straddling both ends of the top plate and the return plate, and the top plate. And a plurality of girders straddling back to back at the center of the wave return plate.

  By comprising in this way, the top plate and wave return plate comprised by the some aluminum-made extruded shape material can be made into a firm structure.

  The invention according to claim 9 is the overtopping prevention structure according to any one of claims 6 to 8, wherein the joint includes a rising piece of a first girder disposed on the lower surface of the top plate, It consists of the standing piece of the 2nd beam material arrange | positioned on the bank side of a wave return board, and the connection member which connects the standing piece of the said 1st and 2nd beam material so that rotation is possible. And

  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 top plate and the wave return plate can be connected to each other so as to be displaceable by configuring the constituent members of the joint with the substantially L-shaped first bracket and the second girder.

  The invention according to claim 10 is the overtopping prevention structure according to any of claims 6 to 9, wherein the first fixture is a first girder disposed on the lower surface of the top plate. An upright piece, a substantially L-shaped upper mounting bracket fixed to the sea side of the levee, and the upright piece of the first girder and the upright piece of the upper mounting bracket before the top plate is attached to the levee And a second connecting tool, wherein the second fixture includes a rising piece of a second girder disposed on the side of the bank of the wave return plate, and the bank of the bank A substantially L-shaped lower mounting bracket that is fixed to the sea side, and the upright piece of the second girder and the upright piece of the lower mounting bracket can be rotated in advance before the wave return plate is attached to the levee. A second connecting member connected to the upper mounting bracket. The lower mounting bracket is fixed to the bank with a second anchor bolt after the top plate is mounted.

  By comprising in this way, the structural member of the 1st, 2nd attachment tool can be comprised with a substantially L-shaped attachment bracket, Moreover, a 1st crosspiece and a 2nd crosspiece can be comprised, Since it can be comprised with a substantially L-shaped girder, a top plate and a wave return plate can be attached to a dike using a common structural member.

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

  At the top end of the levee, attach the base end side of the aluminum extrusion-shaped top plate along the levee, extend the top plate toward the offshore side, and connect one end via a joint to the top side of the top plate In addition, since the other end of the aluminum return shaped wave return plate along the dike can be attached to the sea side of the dike, a simple, reliable and strong wave overtopping structure can be assembled to the existing dike.

  Since 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 levee, the overtopping structure can be reliably assembled according to the shape and conditions of the existing levee. In this case, the joint member can be connected to the top plate and the wave return plate so as to be displaceable using a common component member, so that the number of components can be reduced and the cost can be reduced.

  Since the top plate and the wave return plate can be attached to the levee using the common component members, the top plate fixture and the wave return plate fixture can be constructed more easily. In addition, the number of components can be reduced and the cost can be reduced.

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 schematic front view of the overtopping prevention structure of 1st Embodiment. It is a schematic perspective view which shows 2nd Embodiment of the overtopping prevention structure which concerns on this invention. It is a perspective view which shows a part of crossing prevention structure of 2nd Embodiment in a cross section. It is a schematic side view of the overtopping prevention structure of 2nd Embodiment. FIG. 8 is an enlarged view (a) of the IV part in FIG. 7, an enlarged view (b) of the V part, and an enlarged view (c) of the VI part. It is a schematic plan view of the overtopping prevention structure of the second embodiment. It is a schematic front view of the overtopping prevention structure of 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>
As shown in FIGS. 1 to 3, the overtopping prevention structure according to the present invention is an aluminum whose base end side is attached to the upper end portion of the dike 1 via a first fixture 5 and extends toward the offshore side. A top plate 2 made of aluminum, one end of the top plate 2 being connected to the front end side of the top plate 2 via a joint 3, and the other end being attached to the sea side of the levee 1 via a second fixture 6. 4, and the top plate 2 and the wave return plate 4 are each formed by a single aluminum extruded profile 10 whose longitudinal direction is disposed along the bank 1. Here, aluminum is meant to include an aluminum alloy.

  In this case, the top plate 2 and the wave return plate 4 are formed of a hollow extruded shape member 10 having a plurality of hollow portions 11 partitioned by a plurality of connecting ribs 10a to 10g, as shown in FIGS. ing. Of the plurality of connection ribs 10a to 10g (seven cases are shown in the drawing) of the top plate 2 and the wave return plate 4, the first and second attachment members 5 and 6 and the vicinity of the attachment portion of the joint 3 are arranged. Between the adjacent connecting ribs 10a, 10b, between 10d, 10e, 10f, 10g, the first and second fixtures 5, 6 and the fixing member for fixing the joint 3, for example, the engagement receiving portion 12 of the fixing bolt 20 are formed. The interval s is as narrow as possible, that is, it is formed so as to be narrower than the interval S between the connecting rib 10c located in the center and the connecting ribs 10b and 10d adjacent to the connecting rib 10c and into which the fixing bolt 20 can be inserted. Note that a space s is also formed between the connecting ribs 10a and 10g at both ends and the side end pieces 13a and 13b in the width direction of the top plate 2 and the wave return plate 4 so as to form the engagement receiving portion 12. The top plate 2 and the wave return plate 4 are formed of the same hollow extruded shape, and it is preferable to form an uneven strip 14 for preventing slipping on one surface of the top plate 2. An uneven strip 14 is also formed on the surface of the return plate 4. The uneven strip 14 for preventing slipping is not necessarily provided. In this case, the hollow extruded shape member 10 (hereinafter referred to as the shape member 10) is formed, for example, to have a length of 2000 mm, a width of 500 mm, and a height of 30 mm so as to cover a range where overtopping occurs. A plurality of shape members are arranged along the bank 1 to form a top plate 2 and a wave return plate 4.

  As shown in FIG. 4, the joint 3 that connects the top plate 2 and one end portion of the wave return plate 4 has three portions in the longitudinal direction (extrusion direction) of the top plate 2 and the wave return plate 4. Is provided. As shown in FIGS. 2 and 3 (b), the joint 3 has a substantially L-shaped first bracket 31 fixed to the lower surface on the front end side of the top plate 2, and one end side surface of the wave return plate 4. The substantially L-shaped second bracket 32 to be fixed, the connecting bolt 22 which is a connecting member for rotatably connecting the upright piece 31b of the first bracket 31 and the upright piece 32b of the second bracket 32, and The connection nut 22 is screwed into the connection nut 23.

  In this case, the first bracket 31 is formed of an aluminum extruded profile, and two fixing bolts 20 penetrating between the connecting ribs 10d, 10e, and 10f of the top plate 2 are formed on the fixing piece 31a. A through hole 31c is provided through each of the first bracket 31 and the first bracket 31 is fixed to the lower surface of the top plate 2 by screwing the fixing nut 21 into the fixing bolt 20 passing through the through hole 31c.

  The second bracket 32 is formed of an aluminum extruded profile, and the fixed piece 32a passes through the side end piece 13a of the return plate 4 and the connecting rib 10a and between the connecting ribs 10a and 10b. Through holes 32 c through which the two fixing bolts 20 pass are provided, and the fixing nut 21 is screwed into the fixing bolt 20 that passes through the through holes 32 c, so that the second bracket 32 is connected to the dam of the wave return plate 4. It is fixed to the side.

  Through holes (not shown) are formed in the upright pieces 31b of the first bracket 31 fixed to the top plate 2 and the upright pieces 32b of the second bracket 32 fixed to the wave return plate 4 as described above. And the connecting nut 23 is screwed to the protruding end of the connecting bolt 22 that passes through the through-holes, so that the top plate 2 and the wave return plate 4 can rotate relative to each other. Connected.

  As shown in FIG. 2 and FIG. 3A, the first fixture 5 includes a substantially L-shaped first mounting bracket 51 fixed to the bottom surface of the base end portion of the top plate 2, and the levee 1. A substantially L-shaped upper mounting bracket 52 fixed to the sea side, and an upright piece 51b of the first mounting bracket 51 and an upright piece 52b of the upper mounting bracket 52 in advance before the top plate 2 is attached to the levee 1. The first connection bolt 22A is a first connection member that is rotatably connected, and a first connection nut 23A that is screwed into the first connection bolt 22A.

  In this case, the first mounting bracket 51 is formed of an extruded shape made of aluminum, and the fixed piece 51a has a space between the side end piece 13a of the top plate 2 and the connecting rib 10a and between the connecting ribs 10a and 10b. A through hole 51c through which the two fixing bolts 20 that penetrate is provided is provided, and the fixing nut 21 is screwed into the fixing bolt 20 that passes through the through hole 51c, whereby the first mounting bracket 51 is attached to the top plate. 2 is fixed to the lower surface.

  The upper mounting bracket 52 is formed of an extruded shape made of aluminum, and the fixed piece 52a is provided with a through hole 52c. The nut 25 is attached to the first anchor bolt 24A that passes through the through hole 52c. The upper mounting bracket 52 is fixed to the upper end portion of the bank 1 by screwing. A chemical anchor bolt or the like is used for the first anchor bolt 24A.

  Through holes (not shown) are formed in the upright piece 51b of the first mounting bracket 51 fixed to the top plate 2 as described above and the upright piece 52b of the upper mounting bracket 52 fixed to the upper end portion of the bank 1 respectively. ) And the first connecting nut 23A is screwed to the protruding side end portion of the first connecting bolt 22A inserted through the through holes, so that the top plate 2 is rotated with respect to the levee 1. It is linked movably.

  As shown in FIGS. 2 and 3C, the second fixture 6 includes a substantially L-shaped second mounting bracket 61 fixed to the side surface of the other end portion of the wave return plate 4, and the levee 1. A substantially L-shaped lower mounting bracket 62 fixed to the sea side, a standing piece 61b of the second mounting bracket 61 and a standing piece 62b of the lower mounting bracket 62 in advance before mounting the wave return plate 4 to the levee 1 The second connecting bolt 22B, which is a second connecting member for connecting the two pivotably, and the second connecting nut 23B screwed to the second connecting bolt 22B.

  In this case, the two fixing bolts 20 penetrating between the connecting ribs 10f and 10g, between the connecting rib 10g and the side end piece 13b of the return plate 4 pass through the fixing piece 61a of the second mounting bracket 61, respectively. A through hole 61 c is provided, and the second mounting bracket 61 is fixed to the bank side surface of the wave return plate 4 by screwing the fixing nut 21 into the fixing bolt 20 passing through the through hole 61 c.

  The fixing piece 62a of the lower mounting bracket 62 is provided with a through hole 62c. By screwing the nut 25 into the second anchor bolt 24B passing through the through hole 62c, the lower mounting bracket 62 is connected to the levee 1. Fixed to the sea side. As the second anchor bolt 24B, a chemical anchor bolt or the like is used similarly to the first anchor bolt 24A.

  Through holes (not shown) are formed in the upright piece 61b of the second mounting bracket 61 fixed to the wave return plate 4 and the upright piece 62b of the lower mounting bracket 62 fixed to the sea side of the levee 1 as described above. 2), and the second connecting nut 23B is screwed to the projecting side end portion of the second connecting bolt 22B inserted through the through holes, so that the wave return plate 4 is attached to the levee 1 And are pivotally connected. The lower mounting bracket 62 is fixed to the levee 1 with the second anchor bolt 24B after the top plate 2 is mounted.

  Similar to the joint 3, the first fixture 5 and the second fixture 6 are provided at three positions, that is, both ends and a central portion in the longitudinal direction (extrusion direction) of the top plate 2 and the wave return plate 4. Yes.

  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 first attachment is attached to the base end of the top plate 2. The bracket 51 is fixed, and the second mounting bracket 61 is fixed to the other end portion of the wave return plate 4. And when attaching to the dike 1, first, the fixing piece 52a of the upper mounting bracket 52 attached to the first mounting bracket 51 at the base end portion of the top plate 2 by the first connecting bolt 22A and the nut 23A is first. The anchor bolt 24A is fixed to the sea surface side of the upper end of the levee 1. 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 62a of the lower mounting bracket 62 attached to the second mounting bracket 61 at the other end of the wave return plate 4 by the second connecting bolt 22B and the nut 23B is provided. The overtopping prevention structure is attached to a place where overtopping of the levee 1 occurs by fixing it to the sea surface below the levee 1 with the two anchor bolts 24B. 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 slightly 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.

  The gap between the top plates 2 of each unit attached as described above may be covered and filled with a plate material (not shown). At this time, it is better to fix the plate material to the top plate 2 with a blind rivet or the like.

Second Embodiment
As shown in FIGS. 5 to 10, the overtopping prevention structure of the second embodiment has a plurality of, for example, two aluminum hollow extruded shapes 10 </ b> A (the longitudinal direction is disposed along the embankment 1 and joined together. (Hereinafter referred to as a shape member 10A), a substantially L-shaped first or second girder member 7, 8 straddling one surface of the two shape members 10A, a shape member 10A and a girder member 7, This is a case where the top plate 2A and the wave return plate 4A are formed by a fixing member, for example, a fixing bolt 20A. Further, in the overtopping prevention structure of the second embodiment, the base end portion of the top plate 2A is attached to the levee 1 by the first fixture 5A, and the distal end portion of the top plate 2A and one end portion of the wave return plate 4A are jointed. It connects with 3A, and it has the structure which attaches the other end part of the wave return plate 4A to the bank 1 with the 2nd attachment tool 6A.

  In this case, the shape member 10A constituting the top plate 2A and the wave return plate 4A has three rectangular hollow portions 11 defined by a plurality of, for example, two connecting ribs 10h and 10i, and is joined. A fitting groove 16 is formed on the side wall 15a of the shape member 10A, and a fitting protrusion 17 that can be fitted to the fitting groove 16 is formed on the side wall 15b of the other shape member 10A. Further, a narrow groove-like concave groove portion 18 is formed in the longitudinal direction at a portion where the connecting ribs 10h and 10i are located on the lower surface of the shape member 10A forming the top plate 2A. Similarly, a narrow groove-shaped concave groove 18 is formed in the longitudinal direction at a portion where the connecting ribs 10h and 10i on the side surface of the bank of the profile member 10A constituting the wave return plate 4A are located. In this case, the shape member 10A is formed to have a length of 2000 mm, a width of 250 mm, and a height of 30 mm, for example.

  By fitting the fitting recess 16 and the fitting projection 17 of the two shape members 10A formed as described above, the shape members 10A are joined to each other. Then, the girders 7 or 8 are stretched over the joined shape member 10A, and the head portion 20a formed in, for example, a rectangular shape is slidably accommodated in the groove 18 provided in the shape member 10A. The bolts 20A pass through the through holes 7c or 8c provided in the fixing piece 7a or 8a of the beam member 7 or 8, and the fixing nut 21 is screwed into the projecting portion, thereby joining the two shaped members 10A and The girders 7 or 8 are fixed, and the top plate 2A and the wave return plate 4 are formed.

  In this case, as shown in FIGS. 9 and 10, the first girder 7 includes two pieces straddling both ends in the longitudinal direction of the top plate 2 </ b> A, and the standing pieces 7 b straddling each other back to back at the center. A total of four of the two installed are used. In addition, the second girder 8 has two pieces straddling the both ends of the wave return plate 4A in the longitudinal direction and the upright piece 7b between the back portions of the first girder member 7 at the center. A total of four pieces of two pieces are used in which 8b are laid back to back. The first and second girders 7 and 8 are formed of an extruded shape made of aluminum.

  The joint 3A includes an upright piece 7b of the first beam member 7 disposed on the lower surface of the top plate 2A, an upright piece 8b of the second beam member 8 disposed on the bank side surface of the return plate 4A, The first and second beam members 7 and 8 are constituted by a connecting member for connecting the upright pieces 7b and 8b so as to be rotatable, that is, a connecting bolt 22 and a connecting nut 23 screwed to the connecting bolt 22. It should be noted that the joint 3A disposed in the center of the top plate 2A and the wave return plate 4A has a back-to-back standing piece 7b of the first girder 7 as shown in FIG. In the state where the upright piece 8b is sandwiched, the connecting bolt 22 is penetrated, and the connecting nut 23 is screwed into the protruding portion.

  On the other hand, the first fixture 5A is a substantially L-shaped aluminum extrusion fixed to the upright piece 7b of the first girder member 7 disposed on the lower surface of the top plate 2A and the sea side of the levee 1. The upper mounting bracket 52 formed of a profile and the upright piece 7b of the first girder 7 and the upright piece 52b of the upper mounting bracket 52 are rotatable in advance before the top plate 2A is attached to the levee 1. The first connecting bolt 22A, which is the first connecting member to be connected, and the first connecting nut 23A screwed into the first connecting bolt 22A.

  The upper mounting bracket 52 is provided with a through hole 52c in the fixed piece 52a, and the upper mounting bracket 52 is connected to the first anchor bolt 24A passing through the through hole 52c by screwing the nut 25 into the levee. 1 is fixed to the upper end of 1.

  Through holes (not shown) are formed in the upright piece 7b of the first beam member 7 fixed to the top plate 2A as described above and the upright piece 52b of the upper mounting bracket 52 fixed to the upper end portion of the bank 1 respectively. ) And the first connecting nut 23A is screwed to the projecting side end of the first connecting bolt 22A inserted through the through-holes, so that the top plate 2A is rotated with respect to the levee 1. It is linked movably.

  The second fixture 6A is made of substantially L-shaped aluminum that is fixed to the sea side of the dike 1 and the upright piece 8b of the second beam member 8 that is disposed on the side of the dike of the wave return plate 4A. The lower mounting bracket 62 formed of an extruded profile, and the upright piece 8b of the second beam member 8 and the upright piece 62b of the lower mounting bracket 62 can be rotated in advance before the wave return plate 4A is attached to the bank. The second connecting bolt 22B is a second connecting member to be connected to the second connecting bolt 22B, and the second connecting nut 23B is screwed into the second connecting bolt 22B.

  The lower mounting bracket 62 is provided with a through hole 62c in the fixed piece 62a. The nut 25 is screwed into the second anchor bolt 24B passing through the through hole 62c, so that the lower mounting bracket 62 is connected to the bank. 1 is fixed to the sea surface side.

  Through holes (not shown) are formed in the upright piece 8b of the second beam member 8 fixed to the wave return plate 4A as described above and the upright piece 62b of the lower mounting bracket 62 fixed to the sea surface side of the bank 1 respectively. 2), and the second connecting nut 23B is screwed to the projecting side end portion of the second connecting bolt 22B inserted through the through holes, so that the wave return plate 4A is attached to the bank 1 And are pivotally connected.

  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 the first girder member 7 is fixed to the lower surface of the top plate 2A. A second girder member 8 is fixed to the bank side of the return plate 4A.

  And when attaching to the dike 1, first, the fixing piece 52a of the upper mounting bracket 52 attached to the base end part of the top plate 2A is fixed to the sea surface side of the upper end part of the dike 1 by the first anchor bolt 24A. At this time, since the wave return plate 4A is rotatable with respect to the top plate 2A 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 dike 1, the fixing piece 62b of the lower mounting bracket 62 attached to the other end of the wave return plate 4A is fixed to the sea surface side below the dike 1 by the second anchor bolt 24B. Attach the overtopping prevention structure to the place where overtopping of the 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.

<Other embodiments>
In the second embodiment, the case where there are two hollow extruded shapes 10A constituting the top plate 2A and the wave return plate 4A has been described. However, the top plate and the wave return plate are joined by joining three or more hollow extruded shapes. May be formed. The top plates 2 and 2A and the wave return plates 4 and 4A do not have to be hollow as long as they have ribs, and may have a channel shape, for example.

DESCRIPTION OF SYMBOLS 1 Levee 2,2A Top plate 3,3A Joint 4,4A Wave return plate 5,5A 1st fixture 6,6A 2nd fixture 7 First girder 8 Second girder 10,10A Hollow extrusion Profiles 10a to 10i Connecting rib 11 Hollow portion 12 Engagement receiving portion 16 Fitting recess 17 Fitting protrusion 20, 20A Fixing bolt 20a Head 21 Fixing nut 22, 22A, 22B Connecting bolt 23, 23A, 23B Connecting nut 24A, 24B Anchor bolt

Claims (10)

The base end side is attached to the upper end of the levee via a first fixture, and one end is connected to the tip end side of the top plate via a joint. The other end comprises an aluminum wave return plate attached to the sea side of the dike via a second fixture,
The top plate and the wave return plate are formed of a single aluminum extruded profile whose longitudinal direction is disposed along the bank.
An overtopping prevention structure characterized by that. In the overtopping prevention structure according to claim 1,
A wave overtopping prevention structure, wherein the top plate and the wave return plate are formed of a hollow extruded profile having a plurality of hollow portions defined by a plurality of connecting ribs. In the overtopping prevention structure according to claim 2,
Among the connecting ribs in the top plate and the wave return plate, the first and second mounting tools and the joint are connected between adjacent connecting ribs in the vicinity of the mounting portions of the first and second mounting tools and the joint. An overtopping prevention structure characterized by forming an engagement receiving portion of a fixing member to be fixed. In the overtopping prevention structure according to any one of claims 1 to 3,
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 4,
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 upper mounting bracket that is secured to the sea side of the levee. A first connecting member that rotatably connects the upright piece of the first mounting bracket and the upright piece of the upper mounting bracket in advance before mounting the top plate to the levee;
The second fixture includes a substantially L-shaped second mounting bracket fixed to the side surface of the other end of the wave return plate, and a substantially L-shaped lower mounting bracket fixed to the sea side of the levee. And a second connecting member that rotatably connects the upright piece of the second mounting bracket and the upright piece of the lower mounting bracket in advance before the wave return plate is attached to the bank.
The upper mounting bracket is fixed to the levee by a first anchor bolt, and the lower mounting bracket is fixed to the levee by a second anchor bolt after the top plate is mounted. Prevention structure. The base end side is attached to the upper end of the levee via a first fixture, and one end is connected to the tip end side of the top plate via a joint. The other end comprises an aluminum wave return plate attached to the sea side of the dike via a second fixture,
The top plate and the return plate are arranged in a longitudinal direction along the bank, and a plurality of extruded aluminum members joined together, a plurality of bottom surfaces of the top plate and a plurality of side walls of the return plate It is composed of a substantially L-shaped girder straddling an aluminum extruded profile, and a fixing member that fixes the extruded profile and the girder.
An overtopping prevention structure characterized by that. In the overtopping prevention structure according to claim 6,
The aluminum extruded profile constituting the top plate and the wave return plate is slidably accommodated in a plurality of hollow portions defined by a plurality of connecting ribs and a fixing bolt head constituting the fixing member. A wave overtopping prevention structure, characterized in that it is formed of a hollow extruded shape member having a narrow opening-shaped concave groove. In the overtopping prevention structure according to claim 6 or 7,
The girder has a plurality of girder members straddled on both ends of the top plate and the wave return plate, and a plurality of girder members straddled back to back at the center of the top plate and the wave return plate, respectively. An overtopping prevention structure characterized by that. In the overtopping prevention structure according to any one of claims 6 to 8,
The joint includes an upright piece of a first girder disposed on the lower surface of the top plate, a second upright piece of a girder disposed on the side of the bank of the wave return plate, and the first and first 2. A wave overtopping prevention structure comprising: a connecting member for rotatably connecting upright pieces of two girder members. In the overtopping prevention structure according to any one of claims 6 to 9,
The first fixture includes an upright piece of a first girder disposed on a lower surface of the top plate, a substantially L-shaped upper mounting bracket fixed to the sea side of the levee, and the top plate A first connecting member that rotatably connects the upright piece of the first girder and the upright piece of the upper mounting bracket in advance before mounting to the dike,
The second fixture includes an upright piece of a second girder disposed on the side of the bank of the wave return plate, a substantially L-shaped lower mounting bracket fixed to the sea side of the bank, A second connecting member that rotatably connects the upright piece of the second beam member and the upright piece of the lower mounting bracket in advance before mounting the wave return plate to the levee;
The upper mounting bracket is fixed to the levee by a first anchor bolt, and the lower mounting bracket is fixed to the levee by a second anchor bolt after the top plate is mounted. Prevention structure.

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