JP6325211B2 - Breakwater fence with drifting object capture function - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a breakwater fence with a drifting object capturing function that suppresses inflow of drifting objects swept away by a high tide level wave into the inland in an emergency when a high tide level wave such as a high wave, a storm surge, or a tsunami strikes. It is.

  For example, Japanese Patent Application Laid-Open No. 2006-207130 describes a tide fence that captures wave splashes scattered from the sea side to the land side. This tide fence has a tide plate fixed to a support column, and the tide plate includes a perforated plate made of metal or hard synthetic resin, a non-woven filter, and a mesh panel of a grid-like wire mesh. It is formed by stacking.

  By the way, when a high tide wave hits the land, the drifting material flows into the land from the sea, and the assets on the ground are destroyed by the collision of the drifting material, and human lives are exposed to danger. Damage will occur. For this reason, when such a high tide level wave occurs, it is considered to be extremely important from the viewpoint of preservation of land assets and lifesaving to capture inflows and prevent inflow into the inland. .

JP 2006-207130 A

  However, there are large and heavy objects such as ships that drift away by high tide waves. If such a heavy-weight drifting object directly collides with the tide fence, the tide fence may not be able to endure the load and the tide fence is easily dropped.

  Accordingly, the present invention provides a breakwater fence with a flotage trapping function that reduces the impact impact of a flotation object by creating a reflected flow of a high tide level wave and repelling it toward the flotation object in order to solve such problems. The purpose is that.

In order to achieve this object, the breakwater fence with a flotage trapping function according to claim 1 includes a vertical wall having an upper wall and a lower wall disposed in a lower portion of the upper wall. The vertical wall is provided with an overhanging wall provided so as to protrude outward from the wall surface of the lower wall, and the upper wall, the lower wall, and the The projecting wall body is formed in a perforated shape allowing water to pass therethrough, and the lower wall body and the projecting wall body have a hole area ratio less than the hole area ratio of the upper wall body .

The breakwater fence with a flotage trapping function according to claim 2 is characterized in that a vertical wall having an upper wall body and a lower wall body disposed below the upper wall body is erected on the foundation structure. The vertical wall includes an overhanging wall provided so as to project outward from the wall surface of the lower wall, and the lower wall and the overhanging wall are equivalent to the upper wall. The hole is formed in a perforated shape having a hole opening ratio, and the upper wall body, the lower wall body, and the protruding wall body have a hole opening ratio of 50% or less.

  The breakwater fence with a flotage trapping function according to claim 3 is the breakwater fence with a flotage trapping function according to claim 1 or 2, wherein the projecting wall body is outside a boundary portion between the upper wall body and the lower wall body. A predetermined length is extended in the direction.

  The breakwater fence with a flotage trapping function according to claim 4 is the breakwater fence with a flotage trapping function according to claim 1 or 2, wherein the overhanging wall body has an upper portion of the overhanging wall body at a lower portion. Compared to the outer wall, the lower wall is obliquely provided on the wall surface.

  The breakwater fence with a flotage catching function according to claim 5 is the breakwater fence with a flotage catching function according to claim 4, wherein the overhanging wall is inclined at an angle of 30 to 45 ° with respect to the lower wall. ing.

  The breakwater fence with a flotage trapping function according to claim 6 is the breakwater fence with a flotage trapping function according to any one of claims 1 to 4, wherein the vertical wall is an upper third of the height of the vertical wall. The upper wall body is disposed in the range of 2/3, and the lower wall body is disposed in the remaining area.

The breakwater fence with a flotage trapping function according to claim 7 is the breakwater fence with a flotage trapping function according to any one of claims 1, 4, and 6, wherein the upper wall body The hole area ratio is 30% or more and 50% or less, and the hole area ratio of the lower wall body and the projecting wall body is 40% or less .

  The breakwater fence with a flotage catching function according to claim 8 is the breakwater fence with a flotage catching function according to claim 2, wherein the upper wall body is The porosity of the lower wall body and the projecting wall body is 30% or more and 40% or less.

  The breakwater fence with a flotage trapping function according to claim 9 is the breakwater fence with a flotage trapping function according to any one of claims 1 to 8, wherein the lower wall body and the overhanging wall body collide with a high tide level wave. The wall surface on the side is formed in a continuous concavo-convex shape, and the high tide wave that collides with the concavo-convex shape is reduced.

  According to the breakwater fence with a flotage trapping function according to claim 1, for example, the vertical wall is on the foundation structure facing the sea side so that the wall surface of the overhanging wall becomes a collision surface of the high tide level wave. Established. Then, the high tide level wave that approaches the vertical wall collides with the lower wall body because it has a low tide level at the beginning, and is blocked by the collision with the lower wall body.

  When the tide level of the high tide wave gradually rises, the high tide level wave tends to rise upward along the wall of the lower wall body due to the momentum of the collision between the high tide level wave and the lower wall body. The overhanging wall body reflects the high tide level wave toward the sea side of the vertical wall, and the high tide level wave is converted into a reflected wave returning from the vertical wall to the sea side.

  This reflected wave flow acts as a force that pushes the drifting object that pushes against the vertical wall back to the sea side, buffering the collision between the floating object and the vertical wall, reducing the collision energy between the floating object and the vertical wall, and drifting The load on the vertical wall due to the collision of objects is reduced.

  Moreover, since the load burden on the vertical wall due to the collision of the drifting object is reduced in this way, it is not necessary to manufacture the structural strength of the vertical wall with an excessive design specification. The member size can be reduced, and the manufacturing cost can be reduced accordingly.

  In particular, Japan is in an environment where the land is surrounded by the sea, the total length of the coastline is well over 30,000 kilometers, and the coastline and areas where storm surge waves are expected to strike are extensive, and there is a breakwater fence there. It is inevitable that enormous costs will be required to fully maintain the system.

  Therefore, it is considered that correcting various cost increases such as the production cost of the breakwater fence is an important problem to be solved in order to increase the maintenance rate for the whole country, the breakwater according to the present invention. The fence can reduce the manufacturing cost, and it is considered that the fence exhibits a very advantageous effect.

  Further, the upper wall body is formed in a perforated shape so that a high tide level wave can pass through. For this reason, when the tide level of the high tide wave starts to rise on the sea side and the seawater reaches the upper wall body, the seawater can be passed from the sea side to the land side through the perforated portion of the upper wall body.

  As a result, since the rise of the tide level is suppressed on the sea side of the vertical wall, the high tide level wave is prevented from flowing over the upper end of the upper wall body and overflowing into the land side of the vertical wall. Is done.

  In other words, it is also possible to prevent drifting objects from climbing over the vertical wall due to this overflow, and as a result, the frequency of drifting objects being dammed up and captured by the vertical wall increases, and the drifting objects from the vertical wall increase. The trapping function is improved, and the effect of preventing drifting objects from flowing into the inland area is enhanced.

  Furthermore, the high tide level wave passes through the hole in the upper wall body, so the kinetic energy of the high tide level wave is attenuated. The wave velocity can also be reduced. As a result, the evacuation time can be secured for the people in the inland area in the storm surge area, and damage to the facilities in the hinterland can be reduced.

  In addition to the effects of the present invention described above, in particular, according to the breakwater fence of claim 1, the upper wall body and the lower wall body are provided vertically on the vertical wall, and the opening ratio of the upper wall body is set to the lower part. By increasing the hole area ratio of the wall body and the overhanging wall body, the lower part of the vertical wall blocks the high tide level wave while blocking the drifting object, and the upper part of the vertical wall It is possible to easily construct a structure that has two different functions from the overflow prevention function that prevents the drifting object from getting over while passing the high tide level wave.

  According to the breakwater fence of claim 1, since the upper wall body has a higher hole area ratio than the lower wall body and the overhanging wall body, the high tide level wave compared to the lower wall body and the overhanging wall body. This is advantageous for suppressing the occurrence of overflow.

Further, according to the breakwater fence according to claim 1, a lower wall and overhanging wall, since the aperture ratio compared to the upper wall is formed into a small perforated form, compared to the upper wall In the lower wall, the non-hole portion where the high tide level wave collides and reflects has a larger area ratio than the perforated portion, so that the high tide level wave can be easily reflected.

  In the breakwater fence of claim 1, the opening rate of the upper wall body is set to 30% to 50%, the opening rate of the lower wall body is set to 0% to 40%, and the overhanging wall body is opened. The porosity is preferably 0% or more and 40% or less.

  In particular, according to the breakwater fence of claim 2, although the hole area ratios of the upper wall body, the lower wall body and the overhang wall body are equal, both the hole area ratios are 50%. Since it is below, it is possible to secure a perforated part through which the high tide level wave is passed in the upper wall body and a non-hole part that reflects the high tide level wave in the lower wall body. Complex design specifications that change the rate can be avoided and manufacturing can be simplified.

  In addition, like the breakwater fence of Claim 8, it is preferable that the hole area rate of an upper wall body, a lower wall body, and an overhang | projection wall body shall be about 30% or more and 40% or less, and an opening area rate is less than 30%. As a result, the ratio of the non-porous portion becomes excessive, and as a result, the amount of water passing through the upper wall body is reduced, and it is estimated that the overflow prevention function of the vertical wall is reduced.

  In particular, according to the breakwater fence of claim 3, the overhanging wall body is extended from the boundary part of the upper wall body and the lower wall body to the sea side by a predetermined length, so that the height of the collision with the lower wall body is increased. The tide level wave can be prevented from moving toward the upper wall, and the high tide wave that collided with the lower wall can be more efficiently converted into a reflected flow.

  In particular, according to the breakwater fence of claim 4, the overhanging wall body is configured such that the upper side portion of the overhanging wall body projects to the sea side compared to the lower side portion, and the seaside wall surface in the lower wall body. It is obliquely installed. For example, when the overhanging wall body is obliquely installed on the upper wall surface of the lower wall body, a wave that collides with the lower wall body and rises along the lower wall body is rebounded to the sea side of the vertical wall by the overhanging wall body. It becomes a reflected wave and is made to collide with drifting objects.

  Also, when the overhanging wall body and the lower wall body are arranged side by side, if the overhanging wall body is perforated, part of the high tide level wave passes through the perforated part of the overhanging wall body It is defeated by doing. In addition, the water passing through the perforated part of the overhanging wall body stays between the overhanging wall body and the lower wall body to form a water wall, and a high tide level wave is generated in the perforated part of the overhanging wall body. It becomes difficult to enter. For this reason, even if the projecting wall body is perforated, the high tide level wave that collided with the projecting wall body can be bounced back to the sea side and converted into a reflected wave.

  Moreover, if the overhanging wall body and the lower wall body are perforated, a part of the high tide level wave will pass through the perforated part and enter the inland part. As the impact load of the high tide level wave received by the wall is reduced, the durability against the collision impact of the high tide level wave is improved.

  Furthermore, if the overhanging wall body and the lower wall body are perforated, the high tide level wave that has passed through the overhanging wall body further collides with the lower wall body and is converted into a reflected wave, while the high tide level wave is By passing through both the exit wall body and the lower wall body, the depressurization action of the high tide level wave is further enhanced.

(A) is the figure which looked at the wave-breaking fence of 1st Example from the sea side front, (b) is a top view of this wave-breaking fence. It is a longitudinal cross-sectional view in the II-II line | wire of Fig.1 (a). FIG. 3 is an enlarged longitudinal sectional view of FIG. 2. FIG. 4 is an enlarged longitudinal sectional view taken along line IV-IV in FIG. (A) is the enlarged front view which expanded the wave-shielding board partially, and (b) is a cross-sectional view in the BB line of (a). (A) is explanatory drawing which showed the state which installed the breakwater fence in the foundation structure in a revetment part, (b) shows the state which installed the breakwater fence in the inland part compared with the revetment part FIG. (A) is the figure which looked at the wave-breaking fence of 2nd Example from the sea side, and (b) is a top view of this wave-breaking fence. It is a longitudinal cross-sectional view in the VIII-VIII line of FIG. (A) is the figure which looked at the wave-breaking fence of 3rd Example from the sea side, and (b) is a top view of this wave-breaking fence. It is a longitudinal cross-sectional view in the XX line of FIG. It is a figure which shows another modification.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The breakwater fence 1 according to an embodiment of the present invention includes a wavebreak function that reduces flood damage on land by damming a water flow of a high tide level wave, and a drifting object that is swept away by a high tide wave, such as a ship or a vehicle. It has a capture function that captures containers, timber, house waste, etc., protects lives and property from collisions with drifting objects, and reduces both land intrusion and outflow to the sea.

  In other words, according to the breakwater fence 1, in the event of an emergency when a high tide level wave strikes, the drifting material pushed away by the high tide level wave is prevented from flowing into the inland area, and the drifting material flows out to the sea side during the pulling wave. Can be suppressed.

  FIG. 1A is a front view of the breakwater fence 1 according to the first embodiment of the present invention when viewed from the sea side, and a part of the horizontal direction (left and right direction in FIG. 1) is omitted in the middle. FIG. 1 (b) is a plan view of the break fence 1. In addition, in FIG. 1, some illustration of the some small hole 8 in the perforated folded plate mentioned later is abbreviate | omitted.

  As shown in FIG. 1, the breakwater fence 1 according to the first embodiment includes a vertical wall 2, and this vertical wall 2 is erected in a horizontal direction on a foundation structure 100 and mainly includes an upper part. A wall body 2A, a lower wall body 2B, and an overhanging wall body 2C are provided. The vertical wall 2 has its upper wall 2A and lower wall 2B vertically upright in a vertical posture.

  The upper wall 2A is formed in a perforated shape that allows water to pass (less than 100% open area), and the lower wall 2B is disposed in a lower part than the upper wall 2A and cannot pass water. It is formed in a hole shape (opening rate 0%). The overhanging wall 2C is a boundary portion between the upper wall 2A and the lower wall 2B, and is disposed on the sea side wall surface of the vertical wall 2 so that water cannot pass through like the lower wall 2B. It is non-porous.

  Here, the hole area ratio of the upper wall body 2A is preferably 30% or more and 50% or less. Further, in the vertical wall 2, the upper half of the fence height H (vertical direction) of the vertical wall 2 is the upper wall 2A, and the remaining lower half is the lower wall 2B. By this, it is considered that the high tide level wave can be reflected efficiently.

  The breakwater 1 is mainly formed using a plurality of support columns 3, a wavebreak plate 4, and a plurality of wire ropes 5. The plurality of pillars 3 are support columns that serve as a skeleton for allowing the vertical wall 2 to stand on the foundation structure 100, and are formed of a shape steel material such as H-section steel, for example. These struts 3 are so-called intermediate struts, and are erected between so-called two terminal struts (not shown).

  In addition, although illustration is abbreviate | omitted in FIG. 1, the two terminal support | pillars are each standingly arranged by the both ends of the horizontal direction (FIG. 1 left-right direction) of the breakwater fence 1, for example, square shape. It is made of steel pipe material.

  The plurality of support columns 3 are all erected vertically upward from the upper end surface of the foundation structure 100, and the lower end portion is embedded from the upper end surface of the foundation structure 100 in the interior thereof. These struts 3 are arranged in parallel in the lateral direction of the foundation structure 100 at a predetermined interval.

  The wave preventing plate 4 includes a wave preventing plate 4 of the upper wall 2A in which a plurality of perforated folded plates are gathered, a wave preventing plate in the lower wall 2B in which a plurality of non-perforated folded plates are gathered, and a plurality of pieces. And a wave preventing plate 4 of the overhanging wall 2C in which the non-perforated folded plates are gathered. The wave preventing plate 4 is constructed between the support columns 3 and supported by the support columns 3, and is thus continuous in the lateral direction on the foundation structure 100. Each folded plate forming the wave preventing plate 4 is formed of a highly rigid thin plate material such as a metal plate such as a steel plate or a reinforced resin plate such as FRP.

  The folded plates of the wave preventing plates 4 of the upper wall body 2A and the lower wall body 2B are continuously provided in the vertical direction (the vertical direction in FIG. 1) from the uppermost end of each column 3 to the upper end surface of the foundation structure 100. Moreover, the lower edge of the wave preventing plate 4 of the lower wall 2B is in contact with or in close proximity to the upper end surface of the foundation structure 100, and a high tide level from the boundary between the lower wall 2B and the foundation structure 100 is reached. The seawater at the time is reduced.

  The plurality of folded plates used for the wave preventing plates 4 of the upper wall body 2A and the lower wall body 2B are the vertical direction (vertical direction in FIG. 1 (a)) and the horizontal direction (FIG. 1 (a)). ) In the left-right direction), the plurality of folded plates used for the wave preventing plate of the overhanging wall 2C are the front-rear direction (vertical direction in FIG. 1B) and the lateral direction (FIG. 1B) of the vertical wall 2. ) In the left-right direction), each has a predetermined vertical width and horizontal width.

  For example, the wave preventing plate 4 of the upper wall body 2A is formed by arranging a plurality of perforated folded plates side by side in the vertical direction and the horizontal direction, and the wave preventing plate 4 of the lower wall body 2B includes a plurality of wave preventing plates 4 The non-perforated folded plates are formed by being juxtaposed in the vertical direction and the lateral direction, and the wave preventing plate 4 of the overhanging wall body 2C has a plurality of non-perforated folded plates juxtaposed in the front-rear direction and the lateral direction. It is formed by that.

  Specifically, among these non-porous and perforated folded plates, the wave preventing plates 4 of the wall bodies 2A and 2B are adjacent to each other in the vertical direction of the vertical wall 2 (see FIG. 1A). The break plates 4 of the wall body 2C are arranged side by side in a state in which folded plates adjacent to each other in the front-rear direction (see FIG. 1 (b)) of the establishment wall 2 are in contact with each other. .

  Moreover, the wave-proof board 4 of wall body 2A, 2B has the lateral direction both ends of each folded board with respect to the support | pillar 3, and the wave-proof board 4 of wall body 2C has the lateral direction both ends of each folded board with a brace member. 11 is fastened and fixed via fasteners (see FIG. 1) such as bolts and nuts.

  Further, in the wave preventing plates 4 of the wall bodies 2A and 2B, a narrower space is provided between the folded plates adjacent to each other in the lateral direction as compared with the lateral width of the support column 3, and behind this interval, the support plate 3 A front portion is arranged (see FIG. 5B).

  The plurality of wire ropes 5 are supported in a state in which both ends thereof are locked and fixed to a terminal column (not shown), and an intermediate portion in the longitudinal direction (left and right direction in FIG. 1) is supported by the plurality of columns 3. ing. Each wire rope 5 has both ends in the longitudinal direction locked to terminal posts via rope end fittings (not shown), and the direction in which the wave preventing plate 4 is installed on the upper wall body 2A and the lower wall body 2B ( It is stretched between the columns 3 so as to extend along the left and right direction in FIG.

  The plurality of wire ropes 5 are juxtaposed at a predetermined interval in the longitudinal direction (vertical direction in FIG. 1) of the wave preventing plate 4 in the upper wall body 2A and the lower wall body 2B, and the wave preventing plate 4 Is attached to the back of the folded plate (see FIG. 2). Each wire rope 5 has a property of elastically expanding and contracting in the longitudinal direction, and has an elongation of about several percent (for example, 1 to 2%) with respect to the length of the rope. .

  FIG. 2 is a longitudinal sectional view taken along the line II-II in FIG. 1A. The left side in the figure is the sea side, and the right side in the figure is the land side. As shown in FIG. 2, the wave preventing plates 4 of the wall bodies 2 </ b> A to 2 </ b> C are formed in a corrugated plate shape in which peaks and valleys having an isosceles trapezoidal shape in a cross-sectional view are alternately repeated. . The wave preventing plates 4 of the wall bodies 2A and 2B are in the vertical direction (vertical direction) of the vertical wall 2, and the wave blocking plates 4 of the wall body 2C are in the front and rear direction (horizontal direction) of the vertical wall 2, respectively, The troughs are alternately repeated.

  Each of the folded plates of the wave breaker plate 4 is folded so as to form a mountain top, slopes connected to both sides of the peak, and a valley bottom connected to the tip of each slope. It is formed in a curved corrugated plate shape. A plurality of such folded plates are arranged side by side, and the bottoms of the folded plates that are adjacent to each other are connected to each other, whereby the bottom of the wave preventing plate 4 is formed.

  In addition, as for the wave prevention board 4 of wall body 2A, 2B, the back surface (right side of FIG. 2) of the sea side wall surface (left side of FIG. 2) is a land side wall surface of the wave prevention board 4. Moreover, since the wave-breaking plate 4 of the walls 2A and 2B is a corrugated thin plate, the valley of the land side wall surface in which the mountain back surface of the sea side wall surface sinks from the land side wall surface to the sea side. In addition, the rear surface of the valley of the sea side wall surface is a mountain portion of the land side wall surface that protrudes from the land side wall surface to the mountain side.

  FIG. 3 is an enlarged longitudinal sectional view of FIG. 2, and the left side in the figure is the sea side and the right side in the figure is the land side, as in FIG. As shown in FIG. 3, the wire rope 5 is attached to the land side wall surface of the wave preventing plate 4 of the wall bodies 2A and 2B. The wire rope 5 is housed in a land-side trough (back side portion of the sea-side mountain) of the folded plate to which it is attached.

  Moreover, each wire rope 5 is aerial at a position closer to the sea side (left side in FIG. 3) than the end face of the land-side summit in the folded plate. The wire rope 5 thus suspended is connected to the folded plate in the wave preventing plate 4 of the wall bodies 2A and 2B via a connector 6 extending from the land-side valley bottom of the folded plate to which it is attached. It is connected.

  The connector 6 uses an eye bolt and a nut, and is a fixing portion 6a that is fastened and fixed to the folded plate by screwing the male screw portion of the eye bolt and the female screw portion of the nut. The engaging portion 6b has an annular shape. The engaging part 6b of the connector 6 has an inner peripheral part as an engaging hole 7c, and the wire rope 5 passes through the engaging hole 7c, so that the wire rope 5 becomes the wall body 2A, It is connected and engaged with the 2B wave barrier plate 4.

  4 is an enlarged longitudinal sectional view taken along line IV-IV in FIG. 1 (a). Like FIG. 2, the left side in the figure is the sea side and the right side in the figure is the land side. As shown in FIG. 4, the wire rope 5 is supported by the support column 3 via a fastener 7 fastened and fixed to the front portion (left side of FIG. 4) of the support column 3.

  The fastener 7 of the wire rope 5 uses U-shaped bolts and nuts that are U-shaped in a side view, and the male threaded portions at both ends of the U-shaped bolts and the female threaded portions of the nuts are screwed together. Thus, the fixing portion 7a is fastened and fixed to the front portion of the column 3.

  According to the fastener 7, the annular portion 7b having a D-shape in a side view surrounded by the U-shaped bolt and the column 3 is formed, and the inner peripheral portion of the annular portion 7b serves as the engagement hole 7c. Then, the wire rope 5 is engaged with and supported by the support column 3 by passing the wire rope 5 through the engagement hole 7c.

  FIG. 5A is an enlarged front view in which the wave preventing plate 4 of the upper wall body 2A is partially enlarged, and FIG. 5B is a cross-sectional view taken along line BB in FIG. It is.

  As shown in FIG. 5, the wave preventing plate 4 of the upper wall body 2 </ b> A has a sea side mountain portion and a sea side trough portion of each folded plate toward the installation direction of the wave preventing plate 4 (left and right direction in FIG. 5). It is formed continuously. In addition, each folded plate is fastened and fixed to each column 3 at both ends in the lateral direction via fasteners such as bolts and nuts. The perforated folded plate has a large number of small holes 8 drilled (through) all over the remaining part except for both ends in the lateral direction (left and right direction in the figure).

  Each small hole 8 of the perforated folded plate functions as a vent hole through which air passes during normal times, and functions as a water vent hole through which seawater passes in an emergency when a high tide level wave is approaching.

  Specifically, in the perforated folded plate of the present embodiment, a plurality of small circular holes 8 are formed in a staggered pattern on the plate surface of the inclined portion, and the summit and the sea-side valley portion of the seaside mountain portion. A plurality of horizontally long oval holes 8 are formed in two straight lines in the bottom of the valley. A plurality of horizontally long small holes 8 in the seaside mountain portion of the perforated folded plate are also used as fixing holes of the fixing portion 6 a of the connector 6.

  As described above, the wave preventing plate 4 of the upper wall 2A allows seawater to pass through in the thickness direction (the left and right directions in FIGS. 2 and 4) through the numerous small holes 8 formed in each folded plate. In addition, the wave load can be received by the non-porous plate surface 9 (non-hole portion) between the small holes 8 (perforated portions) and the waves can be de-energized.

  The connection tool 6 is disposed only at one place in the horizontal width direction center of the folded plate in the installation direction of the wave preventing plate 4 (left and right direction in FIG. 5). In addition, the arrangement | positioning number of the connection tool 6 is not necessarily limited to one place, You may make it arrange | position to multiple places in the horizontal width direction of one folded plate.

  Further, the engagement holes 6c and 7c of the coupling tool 6 and the fastener 7 are formed so that the inner diameter thereof is slightly larger than the outer diameter of the wire rope 5, and the wire rope 5 is stretched through the engagement holes 6c and 7c. It can freely move in the installation direction (left and right direction in FIG. 5).

  Furthermore, the wire rope 5 is stretched along the construction direction of the folded plate while being accommodated in the land-side valley, and the cable end fitting of the wire rope 5 is stretched to the wire rope 5. The required tensile force is adjustable.

  In the present embodiment, the wire rope 5 is connected to the wave preventing plate 4 via the connector 6, but the connecting member of the wave preventing plate 4 and the wire rope 5 is not necessarily limited to this, For example, a welded joint that joins the wire rope 5 and the wave preventing plate 4 by welding may be used.

  Further, on the sea side wall surface of the wave breaker plate 4, a connecting plate 10 is laid across the edges of the folded plates arranged in the vertical direction (the bottom of the trough on the sea side in the figure). The folded plates adjacent to each other in the vertical direction are connected and fixed to each other by fastening and fixing to each folded plate via a fastener such as a bolt and nut. This connecting plate 10 is also directly behind the connecting plate 10 on the sea side wall surface of the wave preventing plate 4, and the two connecting plates 10 on the front and back sides are fastened together with fasteners such as bolts and nuts (FIG. 3). reference.).

  As described above, the wave preventing plate 4 of the upper wall body 2A and the perforated folded plate used for the upper wall body 2A have been described. However, the wave preventing plate 4 of the lower wall body 2B and the overhanging wall body 2C and the non-hole folded plate used for the same. Except that a plurality of small holes 8 having a circular shape and a horizontally long oval shape are not formed, the wave blocking plate 4 of the upper wall body 2A and the perforated folded plate used therefor are configured.

  For example, similarly to the upper wall body 2A, the lower wall body 2B is provided with a wire rope 5 using a connector 6 and a clasp 7, and the wave barrier plates of the lower wall body 2B and the overhanging wall body 3 are attached. Each of the folded plates 4 is connected and fixed via a connecting plate 10 (see FIG. 1). However, since the non-hole folded plate does not have a plurality of small holes 8, it exhibits an effect different from that of the perforated folded plate in that it can receive the wave load on its entire plate surface and depress the wave. Can do.

  Next, referring back to FIG. 1 and FIG. The overhanging wall body 2C is provided so as to project outward (sea side) from the sea-side wall surface of the lower wall body 2B, and is formed in a non-porous shape that cannot pass water. The overhanging wall 2C extends outward from the boundary between the upper wall 2A and the lower wall 2B by a predetermined length. For example, the overhanging wall 2C can reflect the high tide level wave more efficiently by extending about 500 to 1000 mm in the horizontal direction from the boundary between the upper wall 2A and the lower wall 2B of the vertical wall 2. .

  The overhanging wall body 2 </ b> C mainly includes an arm member 11, an elbow member 12, and a wave preventing plate 4. The arm member 11 and the elbow member 12 are skeleton members of the overhanging wall 2 </ b> C, and extend from the front surface of each column 3. These arm members 11 and elbow members 12 are formed by combining shape steel materials such as L-shaped steel, for example.

  The arm member 11 has a base end portion fixed to a boundary portion between the upper wall body 2A and the lower wall body 2B on the front surface of the column 3, and the seam member 11 forms a right angle with respect to the column 3 from the fixed end portion. It extends horizontally toward the side.

  The elbow member 12 is provided obliquely so as to incline from the lower end portion of the support column 3 toward the distal end portion of the arm member 11. The upper and lower end portions of the elbow member 12 are fastened and fixed to fixing stays 13 and 13 provided at the tip end portion of the arm member member 11 and the lower end portion of the support column 3 via fasteners such as bolts and nuts (see FIG. 2). Yes. The arm plate member 11 and the elbow member 12 support the wave preventing plate 4 of the overhanging wall 2C.

  Similarly to the wave preventing plate 4 of the lower wall 2B, the wave preventing plate 4 of the overhanging wall 2C is formed by collecting a plurality of non-hole folded plates. The wave preventing plate 4 of the overhanging wall 2 </ b> C is constructed between the arm members 11 and supported by the arm members 11, and is continuously provided in the lateral direction of the wave preventing fence 1.

  Moreover, as for the wave prevention board 4 of this overhang | projection wall body 2C, a plurality of perforated folding boards are the extending direction (FIG. 2 left-right direction) of the arm member 11, and the horizontal direction (FIG. 1 left-right direction) of the break fence 1 As a result, the ridges and valleys of a trapezoidal shape such as a cross-sectional view are alternately repeated in the extending direction of the arm member 11 so as to be formed into a single corrugated plate that is continuous in an uneven shape.

  The plurality of non-hole folded plates are the same as the non-hole folded plates that form the wave preventing plate 4 of the lower wall 2B described above. In these non-hole folded plates, adjacent folded plates in the extending direction (front-rear direction (vertical direction in FIG. 1B)) of the wave preventing plate 4 of the overhanging wall 2C abut each other's edge. The both ends in the lateral direction are fastened and fixed to the arm member 11 via bolts and nuts (see FIG. 1).

  According to the breakwater fence 1 of the present embodiment described above, the vertical wall 2 faces the sea side so that the wall surface of the overhanging wall 2C becomes the collision surface of the high tide level wave on the foundation structure 100. Is erected. For this reason, when the tide level reaches the lower wall body 2B, the high tide level wave that approaches the vertical wall 2 collides with the lower wall body 2B and is blocked. The high tide level wave is reduced by the collision with the lower wall body 2B, but if the de-energization is still not sufficient, the high tide level wave is generated along the wall surface of the lower wall body 2B by the momentum of the collision. Try to rise upward.

  However, since the overhanging wall 2C is disposed on the lower wall 2B, the high tide level wave is rebounded toward the sea side of the vertical wall 2 by the overhanging wall 2C. It is converted into a reflected wave returning to the sea side. Since this reflected wave collides with the drifting object that rushes from the sea side of the vertical wall 2, the collision energy between the floating object flowing toward the vertical wall 2 and the vertical wall 2 is reduced. The load applied to the vertical wall 2 can be reduced.

  For example, FIG. 6A is an explanatory view showing a state in which the breakwater fence 1 of the present embodiment is installed on the foundation structure 100 in the seawall, and FIG. 6B is a block diagram of the present embodiment. It is explanatory drawing which showed the state which installed the wave fence 1 in the inland part compared with the revetment part. As shown in FIG. 6, when a drifting object such as a ship or a car is swept away by a high tide level wave and approaches the breakwater fence 1, it collides with the lower wall body 2 </ b> B and the overhanging wall body 2 </ b> C of the breakwater fence 1. The bounced reflected wave is pushed back toward the drifting object of the ship or the automobile, and the reflected wave prevents the drifting substance from approaching the wave barrier 1.

  In addition, even if the drifting object collides close to the breaker fence 1, the drifting object is pushed back to the upstream side (sea side) by the reflected wave. As a result of the reduction of the impact associated with, damage to the breakwater fence 1 is also reduced.

  Next, with reference to FIG.7 and FIG.8, the breakwater fence 20 of 2nd Example is demonstrated below. In addition, about the same part as 1st Example, the description is abbreviate | omitted and only a different part is demonstrated.

  FIG. 7A is a front view of the breaker fence 20 according to the second embodiment from the sea side, with a part of the horizontal direction (left and right direction in FIG. 7) omitted in the middle. 7 (b) is a plan view of the breakwater 20. FIG. 8 is a longitudinal sectional view taken along line VIII-VIII in FIG. In addition, in FIG. 7, some illustration of the some small hole 8 in the perforated folded plate mentioned later is abbreviate | omitted.

  As shown in FIGS. 7 and 8, the overhanging wall body 22C is provided so as to project outward (sea side) from the sea-side wall surface of the lower wall body 2B, and is formed in a non-porous shape that cannot pass water. Has been. The overhanging wall body 22C is obliquely provided on the wall surface of the lower wall body 2B in such a form that an upper portion of the overhanging wall body 22C projects outward as compared with a lower side portion (see FIG. 8). For example, the overhanging wall body 22C can reflect the high tide level wave efficiently by tilting at an angle of 30 to 45 ° with respect to the lower wall body 2B.

  The wave preventing plate 4 of the overhanging wall body 22C is formed by collecting a plurality of non-folded folded plates. The wave preventing plate 4 is installed between the elbow member 12 and supported by the elbow member 12, and is continuously provided in the horizontal direction of the wave preventing fence 20.

  Further, in the wave preventing plate 4, a plurality of non-folded folded plates are juxtaposed in the oblique direction of the elbow member 12 (from the lower right to the upper left in FIG. 8) and in the horizontal direction of the wave preventing fence 20 (the left and right in FIG. 7). As a result, the elbow base member 12 is formed in a single corrugated plate shape in which the ridges and valleys of an isosceles trapezoidal shape are alternately repeated in the oblique direction of the elbow member 12 and are connected in an uneven shape.

  The plurality of non-hole folded plates are the same as the non-hole folded plates forming the lower wall body 2B. These non-folded folded plates are juxtaposed in a state where the folded plates adjacent to each other in the oblique direction of the elbow member 12 are in contact with each other's edges, and both lateral ends thereof are the front surfaces of the elbow member 12 ( It is fastened and fixed to the sea side) via bolts and nuts (see FIG. 7).

  Next, with reference to FIG.9 and FIG.10, the break fence 30 of 3rd Example is demonstrated below. In addition, about the same part as the 1st or 2nd Example, the description is abbreviate | omitted and only a different part is demonstrated.

  FIG. 9A is a front view of the breaker fence 30 according to the third embodiment as viewed from the sea side, in which a part of the lateral direction (left and right direction in FIG. 9) is omitted in the middle. 9 (b) is a plan view of the break fence 30. FIG. 10 is a longitudinal sectional view taken along line XX of FIG. In addition, in FIG. 9, some illustration of the some small hole 8 in the perforated folded plate mentioned later is abbreviate | omitted.

  As shown in FIG. 10, the column 33 of the breakwater fence 30 is bent and formed in a letter-like shape in a side view so that an intermediate portion in the vertical direction protrudes toward the sea side. The column 33 is provided with vertical portions 33a and 33b on the upper and lower ends thereof, and between the vertical portions 33a and 33b on the upper and lower sides, a bent portion 33c having a square shape in side view is provided. And the bent part 33c of the support | pillar 33 is formed vertically symmetrically.

  The lower half of the bent portion 33c is connected to the upper end of the vertical portion 33b on the lower side of the support 33, and is inclined obliquely upward from the sea side. The upper half of the bent portion 33c is connected to the lower end of the vertical portion 33a on the upper side of the support 33, and is inclined obliquely downward from the sea side. The lower half of the bent portion 33c of the column 33 is inclined to the sea side so as to form a predetermined angle with respect to the vertical portion 33b, and the overhanging wall body 32C has a lower half of the bent portion 33c of the column 33. Used as a skeletal material.

  Among the above-mentioned columns 33, the upper half of the upper vertical portion 33a and the bent portion 33c is the upper wall body 32A, the lower vertical portion 33b is the lower wall body 32B, and the lower half of the bent portion 33C is the lower wall 32C. Used as a skeleton material.

  The overhanging wall body 32C is obliquely installed on the sea wall of the vertical wall 32 by tilting from the upper end of the lower wall body 32B to the sea side at a predetermined angle and projecting to the sea side from the lower wall body 32B. It is dressed up. Here, the overhanging wall body 32C can reflect the high tide level wave efficiently by tilting at an angle of 30 to 45 ° with respect to the lower wall body 32B.

  The wave preventing plate 4 of the overhanging wall body 32C is formed by collecting a plurality of non-folded folded plates. The wave preventing plate 4 of the overhanging wall body 32 </ b> C is constructed and supported between the columns 33, and is continuously provided in the lateral direction of the wave preventing fence 30. The wave preventing plate 4 of the overhanging wall body 32 </ b> C has a plurality of non-folded folded plates inclined in the lower half of the bent portion 33 c of the support column 33 (from the lower right to the upper left in FIG. 10) and next to the wave preventing fence 30. 1 side-by-side in a horizontal direction (FIG. 9 left-right direction), and the ridges and valleys of a trapezoidal trapezoidal shape are alternately repeated in the oblique direction of the lower half of the bent portion 33c. It is formed in a corrugated plate shape.

  The plurality of non-hole folded plates are the same as the non-hole folded plates forming the lower wall body 32B. These non-hole folded plates are juxtaposed in a state in which the adjacent folded plates are in contact with each other in the oblique direction of the lower half of the bent portion 33c of the support column 33, and both lateral ends thereof are arranged. It is fastened and fixed to the lower half front surface of the bent portion 33c of the column 33 via a fastener (see FIG. 9) such as a bolt and nut.

  In addition, in the breakwater 30, the bent portion 33 c of the column 33 is in the middle portion in the vertical direction, but the vertical center lines of the vertical portions 33 a and 33 b above and below the column 33 coincide with each other so that the center of gravity of the vertical wall 32 is increased. It is designed to stabilize.

  The present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, in the breakwater fences 1, 20, 30 of the first to third embodiments described above, the height of the upper wall bodies 2 </ b> A, 32 </ b> A is ½ the upper side of the fence height H of the vertical walls 2, 32, and the lower wall The height of the bodies 2B and 32B is set to 1/2 of the lower side of the fence height H of the vertical walls 2 and 32. However, the height of the upper wall body and the lower wall body is not necessarily half of the fence height of the vertical wall. For example, the range of the upper 1/3 to 2/3 of the fence height of the vertical wall may be the upper wall, and the remaining range may be the lower wall. Thereby, the high tide level wave can be reflected efficiently.

  For example, in the breakwater fences 1, 20, and 30 of the first to third embodiments described above, the upper wall bodies 2A and 32A are formed in a perforated shape, while the lower wall bodies 2B and 32B and the overhanging wall bodies 2C, Although 22C and 32C are formed in a non-porous shape, the lower wall body and the overhanging wall body are not necessarily limited to the non-porous shape, and the lower wall body has an opening smaller than the hole area ratio of the upper wall body. The overhanging wall body may be formed in a perforated shape having an opening ratio less than that of the upper wall body. May be.

  In this case, in order to efficiently reflect the high tide level wave, the opening ratio of the lower wall body is preferably 0% or more and 40% or less, and the opening ratio of the overhanging wall body 2C is preferably 0% or more and 40% or less. .

  In addition, when the lower wall body and the overhanging wall body are formed in a perforated shape, the hole area ratio is not necessarily smaller than that of the upper wall body, and the lower wall body and the overhanging wall body are You may form in the shape of a hole which can permeate | transmit water with the opening rate equivalent to the opening rate of this.

  In such a case, it is preferable that the opening ratio of the overhanging wall body, the upper wall body, and the lower wall body is 50% or less, and in order to reflect the high tide level wave efficiently, all of the opening holes are preferably open. The rate is preferably about 30% to 40%.

  As described above, the open area ratio of the upper wall body, the lower wall body and the overhang wall body can be set with a predetermined width. For example, the inundation depth due to the high tide level wave predicted at the place where the breakwater fence is installed is Depending on various conditions such as the flow velocity, the type of drifting object, etc., it is also possible to select the optimum combination of the aperture ratios.

  In addition, by increasing the hole area ratio of each wall, the transparency of the vertical wall can be improved, so the sea side can be viewed from the land side through the vertical wall, and the coastline can be preserved. Also, by increasing the hole area ratio of each wall body, the water pressure that the vertical wall receives due to the collision of the high tide level wave is reduced, so that the part size can be made compact and the manufacturing cost can be reduced accordingly. .

  FIG. 11 is a diagram showing another modification example, as shown in FIG. The break fence 1 according to the above embodiment is installed on the inland side, and the break fence 50 according to the prior application (Japanese Patent Application No. 2011-266398) by the applicant of the present application on the offshore side (sea side or upstream side) than that. May be installed to attenuate the high tide level wave and capture the drifting object by the prior application breakwater fence 50 and the present breakwater fence 1. Further, the break fences 20 and 30 may be used instead of the break fence 1.

  By installing the breakwater fence 50 on the sea side (offshore side) compared to the breakwater fence 1 in this way, it is possible to reduce the inundation depth and flow velocity of seawater entering the inland due to the storm surge. Accordingly, the break fence 1 can be further downsized.

  In the first embodiment, the vertical wall postures of the upper wall body 2A and the lower wall body 2B of the vertical wall 2 are vertically vertical, but the vertical wall position is not necessarily vertical. The standing posture is not limited to the standing posture, and the standing posture may be such that the vertical standing wall is inclined to the sea side as a whole. In this way, the entire vertical wall tilts to the sea side, so that a high tide level wave can collide with the lower wall body and be sent back to the sea side as a reflected wave. That is, the lower wall body itself can also be used as a means for generating a reflected wave.

  In this way, the vertical wall tilted to the sea side may be, for example, a vertical posture (form) in which the upper wall body and the lower wall body are tilted to the sea side, or only the lower wall body is tilted to the sea side. The upper wall body may be in a vertically vertical position (form) from the upper end portion of the lower wall body while being in the vertical position (form) that has been tilted. As described above, when the lower wall body is also used as a means for generating a reflected wave instead of the overhanging wall body, the overhanging wall body may be removed from the vertical wall.

  In addition, in order to maintain the inclined posture of the vertical wall, an oblique column that supports the vertical wall at a predetermined inclination angle may be added. For example, the oblique column has a base end portion embedded on the upper surface of the foundation structure at the sea side of the vertical wall, and upwardly rearward from the base end portion toward the column of the vertical wall (for example, the upper right side in FIG. 2). ) And the upper end thereof may be connected and fixed to a column of a vertical wall via a fastener such as a bolt and nut.

1,20,30 Breakwater fence (breakwater fence with drifting material capture function)
3, 23, 33 Overhang wall body 5, 35 Vertical wall 5A, 35A Upper wall body 5B, 35B Lower wall body 100 Base structure H Fence height (height of vertical wall)

Claims (9)

A vertical wall having an upper wall and a lower wall disposed in a lower part of the upper wall is erected on the foundation structure, and the vertical wall extends from the wall surface of the lower wall. A projecting wall body provided to project outward; the upper wall body, the lower wall body, and the projecting wall body are formed in a perforated shape that allows water to pass therethrough; The body and the projecting wall body have a hole area ratio less than the hole area ratio of the upper wall body . A vertical wall having an upper wall and a lower wall disposed in a lower part of the upper wall is erected on the foundation structure, and the vertical wall extends from the wall surface of the lower wall. It is provided with a projecting wall body provided so as to project outward, and the lower wall body and the projecting wall body have a perforated shape having a hole area ratio equivalent to that of the upper wall body. A breakwater fence with a drifting object capturing function, characterized in that the hole ratio of the upper wall body, the lower wall body, and the projecting wall body is 50% or less.   The wave overhang with a drifting object capturing function according to claim 1, wherein the overhanging wall body is extended a predetermined length outward from a boundary portion between the upper wall body and the lower wall body. fence.   The said projecting wall body is obliquely provided on the wall surface of the lower wall body in a form in which an upper portion of the projecting wall body projects outwardly compared to a lower portion. Breakwater fence with drifting object capture function described in 2.   5. The breakwater fence with a drifting object capturing function according to claim 4, wherein the projecting wall body is inclined at an angle of 30 to 45 degrees with respect to the lower wall body.   In the vertical wall, the upper wall body is disposed in the range of 1/3 to 2/3 of the height of the vertical wall, and the lower wall body is disposed in the remaining range. The breakwater fence with a flotage catching function according to any one of claims 1 to 4. The hole ratio of the upper wall body is 30% or more and 50% or less, and the hole area ratio of the lower wall body and the projecting wall body is 40% or less. The breakwater fence with a flotage catching function according to any one of claims 3, 4, and 6 depending on the above.   The hole ratio of the upper wall body, the lower wall body, and the overhanging wall body is 30% or more and 40% or less, or any one of claims 3, 4, and 6 depending on claim 2 A breakwater fence with a drifting object capture function.   The lower wall body and the overhanging wall body are formed in a concavo-convex shape in which a wall surface on a side where a high tide level wave collides is formed, and the high wall level wave colliding with the concavo-convex shape is reduced. A breakwater fence with a drifting object capturing function according to any one of claims 1 to 8.

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