JP2006144373A - River revetment device and river revetment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a river revetment device which can minimize damage when running water power of a predetermined level or more is applied to a river bank at the time of flooding, by washing out the other parts than a foundation, to thereby facilitate recovery work etc., and to provide the river revetment method. <P>SOLUTION: The river revetment device is formed of blocks 15, 15, etc. which are laid on a slope 11 of a levee, and each have at least one shaft mounting hole 21 penetrating from an upper surface to a lower surface thereof; a shaft 16 inserted in the shaft mounting hole 21 formed in each of the blocks 15, 15, etc.; and a cover soil non slip material 17 formed of a fabric or a net article mounted and laid on the shafts 16. When power of the predetermined level or more is applied to the shafts 16 at the time of flooding, the shafts 16 are drawn from the shaft mounting holes 21 in a water flowing direction, and the parts above an upper surface of each of the blocks 15, 15, etc. is intentionally collapsed and washed out. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a river revetment apparatus and a revetment construction method, and more particularly to a river revetment apparatus and a revetment construction method for the purpose of river slope protection.

  Usually, a bank is built on the side of the river to prevent flooding of the river. As the revetment method, the revetment method in which natural stones are laid in parallel on the riverbed and / or slope (hereinafter collectively referred to as “slope” etc.), or concrete block A revetment method (for example, refer to Patent Document 2) or the like for preventing the erosion and the outflow by covering the surface.

  In the revetment method described in Patent Document 1, a plurality of vertical piles are driven deeply into a slope, etc., and a frame is formed by passing a cross member between the vertical piles. Similarly, stones are packed to form a revetment structure, and the vertical piles are driven directly into the slope. In this structure, the surface is uneven with natural stone, and this unevenness increases the roughness of the natural stone surface on the frame, reduces the flow velocity around the natural stone, and prevents the outflow of surrounding earth and sand.

The revetment method described in Patent Document 2 is a method in which a concrete block formed by embedding and fixing a natural stone is laid in parallel on a slope or the like in a state in which a part of the revetment projects from the upper surface of the pedestal. As a result, the natural stone protruding from the upper surface of the pedestal of the concrete block increases the surface roughness, reduces the flow velocity around the concrete block, and prevents the outflow of surrounding earth and sand.
JP 2001-172935 A. JP-A-4-166507.

  However, in the invention described in Patent Document 1, a vertical pile is driven directly into a slope, a frame is formed by passing a cross member between the vertical piles, and natural stones are laid in parallel in the frame. Therefore, if the vertical piles are not driven deeply and firmly, the vertical piles will be swept up by the hydropower at the time of flooding, and there is a risk that damage will be lost. In such a case, there is a concern that the slope will be picked up by the standing piles, the ground will loosen, and the effect will be increased. In addition, when the roots are removed, there is a problem that the construction cost increases for a long time because the restoration is the construction from the beginning.

  On the other hand, in the invention described in Patent Document 2, a concrete block formed by embedding and fixing a natural stone in a state in which a part is protruded from the upper surface of the pedestal is laid in parallel on a slope or the like. In this case as well, if a large hydrodynamic force during flooding is applied to the natural stones of the concrete block, the concrete block may be swept up and the damage will be lost to the extent that there is no trace. Also in this case, there is a concern that the ground will loosen due to the concrete block peeling off from the slope and the like, and the influence will be increased. In addition, there was a problem that the restoration was also started from the beginning and the construction cost was increased.

  Therefore, when a flooding force exceeding the specified level is received during a flood, the river bank protection device and river can minimize damage and simplify the restoration work, etc. by leaving the foundation and draining other parts. The technical problem which should be solved in order to obtain this revetment method arises, and this invention aims at solving this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 covers a slope of a river levee and protects the slope from the erosion of flowing water. In order to reduce flow resistance, the embankment has at least one attachment hole or at least one attachment hole penetrating the upper and lower surfaces, and has a substantially flat surface and a rounded side surface. A block laid on the slope, a standing pile attached to the fixture or the attachment hole of the block, and a soil covering slip prevention material comprising a cloth or a net attached to the standing pile. And a river revetment device constructed such that when a predetermined force is applied to the vertical pile by flowing water, the vertical pile is turned over or removed from the fitting or the mounting hole in the flowing direction. . In addition, the said bank protection device can be used also when changing the use of the on-site cast-in-place concrete bank protection or the existing or diverted bank protection block to "vegetation covering earth protection bank".

  According to this configuration, when a predetermined force or more is applied to the vertical pile by flowing water, the vertical pile is reversed or removed from the fixture or the mounting hole in the flowing water direction. This eliminates obstacles on the block, leaving only a substantially flat block surface, reducing the force acting on the block to prevent the block from flowing out and leaving the block on the slope. Moreover, since the surface of the block left on the slope is almost flat, the resistance to running water is reduced, and the running water is moderated to prevent further scouring and erosion. Furthermore, since the resistance received from running water is small, even a lighter mass than that of the conventional block can be stabilized.

  The invention according to claim 2 provides a river revetment apparatus that prevents the covering soil from slipping down by the covering soil slip-off preventing material and stabilizes the vegetation.

  According to this configuration, the soil covering slip prevention material prevents and protects the soil covering slip on the block. That is, by stabilizing the covering soil on the block, plants and the like can be easily rooted, vegetation is stabilized, and the plants and the like can be grown.

  According to a third aspect of the present invention, there is provided a river revetment device in which the covering soil slip prevention material is made of a natural material having biodegradability and is not required to be recovered when it is removed during a flood.

  According to this configuration, the soil covering slip-preventing material formed of a biodegradable natural material is decomposed by natural corrosive action and reduced to the soil even if left undisturbed.

  According to a fourth aspect of the present invention, there is provided a river bank protection device which penetrates the upper and lower surfaces of the block and which has at least one hole or slit for reducing the lift of running water and allowing a plant to take root.

  According to this configuration, when the block receives the lift of running water by the hole or slit provided in the block, the lift is released through the hole or slit. In addition, after the plants have rooted in the holes or slits, they are retained by these plants, so that the outflow of the blocks can be further prevented.

  The invention according to claim 5 is configured such that adjacent blocks are connected to each other in a foldable manner by connecting brackets to form a multiple block, and by adjusting the connecting width of the connecting brackets, there is a gap between the blocks. Provide an adjustable river revetment.

  According to this configuration, blocks connected by connecting metal fittings are folded and stacked in order at the parts connected by the connecting metal fittings, and the stacked state is carried from the factory to the site, for example, and then spread again at the site. Can be laid. In addition, by adjusting the connection width of the connecting bracket, the size of the gap between the blocks is adjusted, the length of the laid block is adjusted, and the plant is made using the adjusted gap. An appropriate space width or the like when netting can be obtained.

  According to the sixth aspect of the present invention, the connecting bracket is provided with a suspension portion so that the plurality of blocks can be lifted substantially horizontally, and in a plurality of directions in both the longitudinal direction and the lateral direction with respect to the slope. A river revetment device that can install a plurality of blocks together is provided.

  According to this configuration, a plurality of blocks formed in a multiple form can be lifted substantially horizontally using the suspending portion of the connecting bracket, and can be installed in a lump on the slope as it is.

  The invention according to claim 7 covers the slope of the river bank and protects the slope from the erosion of flowing water. In the river bank protection method, a plurality of flat blocks are laid on the slope of the bank. A vertical pile that can be turned over or removed from the upper surface of the block, and a cloth or net-like soil covering slip prevention material attached to the vertical pile are installed on the block, A river revetment construction method is provided that is constructed so that the vertical pile is turned over or removed from the fixture or the mounting hole when a predetermined force or more is applied.

  According to this construction method, when a predetermined force or more is applied to the vertical pile by flowing water, the vertical pile is turned over or removed from the fixture or the mounting hole in the flowing water direction. This eliminates obstacles on the block, leaving only a substantially flat block surface, reducing the force acting on the block to prevent the block from flowing out and leaving the block on the slope. Moreover, since the surface of the block left on the slope is almost flat, the resistance to running water is reduced, and the running water is moderated to prevent further scouring and erosion. Furthermore, since the resistance received from running water is small, even a lighter mass than that of the conventional block can be stabilized.

  In the invention according to claim 1, when a force of a predetermined level or more is applied to the vertical pile due to flooding, the vertical pile is reversed or removed in the direction of running water from the fixture or the mounting hole, and the portion above the upper surface of the block is removed. Since the block is intentionally collapsed and left, and the block is left on the slope, the restoration work is not from the beginning, but from the work after the block is laid. As a result, it is possible to shorten the construction period and reduce the construction cost at the time of restoration. In addition, since the block that becomes the pedestal is left on the slope as it is, the slope can be prevented from being further eroded by running water scouring, and damage can be minimized. Furthermore, since the resistance received from running water is small, even a lighter mass than that of the conventional block can be stabilized, and the cost can be reduced.

  Since the invention according to claim 2 can prevent the covering soil from sliding down on the block by the covering soil slip prevention material, in addition to the effect of the invention according to claim 1, the growth of plants and the like is stabilized.

  According to the third aspect of the present invention, the soil covering slip prevention material is made of a natural material having biodegradability and is decomposed by a natural corrosive action even if it is left spilled and is returned to the soil. Therefore, in addition to the effect of the first or second aspect of the invention, the processing after the collapse is simplified.

  In the invention according to claim 4, when the block receives the lifting force of running water, in the initial stage of construction, the lifting force is released through the hole or slit, and after the plant has rooted in the hole or slit, the block is formed by the rooting of these plants. Therefore, in addition to the effect of the first, second or third aspect of the invention, the outflow of the block can be further prevented.

  In the invention according to claim 5, the blocks can be connected in multiples with the connecting metal fittings, and can be carried from the factory to the site in a state where the blocks are folded and stacked in order, and can be spread and laid on the site. In addition, by adjusting the connection width of the connection bracket, the size of the gap between the blocks is changed to the optimum size for plant growth, and the plant is rooted using the gap, and the curve construction is performed by adjusting the laying pitch. It can be done smoothly. As a result, in addition to the effects of the first, second, third, and fourth aspects of the invention, workability can be improved and plant growth can be further assisted.

  According to the sixth aspect of the present invention, a plurality of blocks, which are formed in a multiple shape by using the suspending portion of the connecting bracket, are lifted substantially horizontally or substantially parallel to the slope, and the slope (the shoulder, the slope of the slope of the slope) is left as it is. In addition to the effect of the invention of claim 5, workability can be further improved.

  In the invention according to claim 7, when a force of a predetermined level or more is applied to the vertical pile due to flooding, the vertical pile is reversed or removed in the direction of running water from the fixture or the mounting hole, and the portion above the upper surface of the block is removed. Since the block is intentionally collapsed and left, and the block is left on the slope, the restoration work is not from the beginning, but from the work after the block is laid. As a result, it is possible to shorten the construction period and reduce the construction cost at the time of restoration. In addition, since the block that becomes the pedestal is left on the slope as it is, the slope can be prevented from being further eroded by running water scouring, and damage can be minimized. Furthermore, since the resistance received from running water is small, even a lighter mass than that of the conventional block can be stabilized, and the cost can be reduced.

  In order to achieve the objective of minimizing damage and simplifying the restoration work, etc., by leaving the foundation and draining other parts when receiving hydropower above a certain level during floods In a river revetment device that covers a slope and protects the slope from the erosion of running water, it has at least one attachment hole penetrating the fixture or the top and bottom surfaces, and reduces running water resistance. Therefore, the surface is substantially flat, the side is formed with roundness, the block laid on the slope of the levee, the standing pile attached to the fixture or the attachment hole of the block, And a covering soil slip prevention material composed of a cloth or a net attached to the vertical pile, and when the predetermined pile or more is applied to the vertical pile by running water, the vertical pile is the fixture or the attachment. Tilt in the direction of running water from the hole Or to provide a revetment apparatus constructed rivers as withdrawn.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a revetment after construction to which the present invention is applied. As shown in FIG. 1, in this revetment structure, a revetment structure 12 as a revetment structure device is laid on a slope 11 of a river embankment 10 and the revetment structure 12 is covered with about 30 to 50 cm of earth and sand. After that, the surface is further covered with soil 13, and plants 14 are vegetated on the covered soil 13. In FIG. 1, the water surface denoted by reference numeral H <b> 1 represents a normal water surface before flooding, and the water surface denoted by H <b> 2 represents the water surface when flooding occurs.

  2 and 3 show the revetment structure 12, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof. In FIGS. 2 and 3, the soil 13, the plant 14 and the like are omitted. 2 and 3, the revetment structure 12 is for protecting the river dike 10 from erosion and collapse due to running water, or scouring. The revetment structure 12 includes a plurality of blocks 15, 15... Which are arranged on the slope 11 in the river dike 10, and standing stakes 16 attached to the blocks 15, 15. , 16... And the soil covering slip-off prevention material 17 attached to the standing piles 16, 16.

  4 and 5 are partially enlarged views of the revetment structure 12, FIG. 4 is a plan view showing a state before the upright piles 16 and the covering soil slip prevention material 17 are attached, and FIG. 5 is a side view thereof. 4 and 5, blocks 15, 15... Are connected in the vertical or horizontal direction with the connecting metal fitting 18 in order, and are formed as a multiple block, and a plurality of blocks 15, 15. Handled in bulk.

  Each block 15, 15... Is, for example, a concrete block having a vertical and horizontal length of 1 m, 1 m and a height (thickness) of about 10 cm, and the surface is formed to be almost flat to reduce running water resistance. The sides are rounded. The four corners are partially cut out over the top and bottom surfaces, and a cutout portion 19 is provided at each corner by the cutout. Further, when the concrete blocks 15, 15... Are formed, round bar-like reinforcing bars 20 are inserted in the front and rear portions thereof with the ends 20a and 20a extending into the left and right cutout portions 19, respectively. ing. A screw is engraved on each end 20a, 20a of the reinforcing bar 20.

  Further, each block 15, 15... Is provided with a vertical pile attachment hole 21 penetrating vertically at a central position. The shape of the vertical pile mounting hole 21 may be a polygonal hole such as a pentagon or a hexagon other than a circle. Further, lift reducing holes 22, 22, 22, 22 penetrating vertically are provided at four positions separated from the vertical pile mounting holes 21 by substantially equal distances toward different corners. These lift reduction holes 22, 22... Serve to reduce the lift of running water by draining water that intrudes between the blocks 15, 15. It also serves to make the plant take root on the slope 11. In this example, four lift reducing holes 22, 22... Are formed as round holes, but other than round holes, for example, long holes or slits may be used. At least one or more may be provided.

  6A and 6B show a single piece of the connecting metal fitting 18, in which FIG. 6A is a plan view and FIG. 6B is a side view. In FIG. 6, the connecting metal fitting 18 is composed of a substantially rectangular flat plate-like metal plate 18A and a hanging metal 18B attached to the metal plate 18A. The metal plate 18A is provided with mounting holes 18a and 18a through which the end portions 20a and 20a of the reinforcing bar 20 are penetrated on the side surface. The hanging metal 18B is formed in an inverted U shape, and the U-shaped open ends 18D and 18D are welded to one surface of the metal plate 18A to be integrated with the metal plate 18A, and above the metal plate 18A. The ring-shaped hanging portion 18c is in a state of being made.

  Next, the procedure for connecting the blocks 15 and 15 with the connecting bracket 18 will be described with reference to FIGS. First, the ends through which the reinforcing bars 20 are passed are butted against each other, and the respective blocks 15 and 15 are arranged, and the ends 20a and 20a on one side of the reinforcing bars 20 adjacent to each other in this arrangement are connected. It passes through the mounting holes 18a and 18a from the inner surface side of the metal fitting 18, respectively. In this connection, the hanging portion 18c is set on the upper side. Further, after the mounting, nuts 23 and 23 are respectively fixed by tightening the end portions 20a and 20a of the reinforcing bar 20 which protrudes from the outer surface side of the metal plate 18A through the mounting holes 18a and 18a of the metal plate 18A. When the connecting metal fittings 18 are attached to the left and right sides of the blocks 15 and 15 in this way, the connection at this point is completed.

  Subsequently, another block 15 is prepared for the two blocks 15 and 15 that have been connected, and the end portions through which the reinforcing bars 20 are similarly passed are arranged to face each other. Further, the connecting metal fitting 18 is attached to the end portions 20a, 20a on one side of the reinforcing bars 20 adjacent to each other in this arrangement in the same manner as before, and further fixed with nuts 23, 23. By repeating this operation, the required number of blocks 15, 15... Can be sequentially connected in a multiple manner via the connection fitting 18.

  Further, between the reinforcing bar 20 and the connecting bracket 18, the reinforcing bar 20 can be pivoted around the axis, that is, in the vertical direction of the block 15, and the blocks 15, 15. Can do. A block 15 indicated by a two-dot chain line in FIG. 5 shows the folded state in this way. In addition, considering the efficiency at the time of transporting by truck or the like, the time of making the multiple form may be either at the time of factory shipment or at the construction site, and it is selected according to the working circumstances.

  Further, a gap S1 is provided between each of the blocks 15, 15. This gap S1 can also be used as a gap for vegetation. Therefore, when used for vegetation, the gap S1 needs to have a certain size. Therefore, for example, as shown in FIG. 7, in addition to the mounting holes 18a and 18a, a connecting bracket 18 with mounting holes 18d and 18d is prepared, and the positions of the mounting holes 18a, 18a, 18d and 18d to be used are selected. By doing so, it is also possible to connect the blocks 15, 15... To each other by adjusting the gap S1 suitable for vegetation. In addition, instead of preparing a plurality of holes, it is possible to use the connecting metal fitting 18 provided with an elongated hole extending in the longitudinal direction, and adjust the clearance S1 by changing the mounting position in the elongated hole. Is possible.

The number of blocks 15 connected in a multiple manner by the connecting metal fitting 18 is 8 to 10 in one unit in consideration of handleability and the like. In addition, as shown in FIG. 8, for example, as shown in FIG. 8, a plurality of suspension tools 25, 25 hang down from a gantry 24 made of H steel or the like suspended by a crane. The hooks 25a are hooked on the suspending portions 18c of the connecting metal 18 corresponding to the hooks 25a, are lifted horizontally, are further moved to the construction position, and are perpendicular to the slope 11 at the construction position. Alternatively, when installed in the lateral direction, multiple blocks 15, 15... Can be installed together.
In this way, work efficiency can be increased.

  FIG. 9 is a partially enlarged view of the revetment structure 12 in a state in which the standing pile 16 is attached to the standing pile mounting hole 21 of the block 15. FIG. 9A is a plan view thereof, and FIG. FIG. In FIG. 9, the standing pile 16 is a rod-like material having a circular cross section and a length of about 30 to 50 cm. The vertical pile 16 is loosely inserted into the vertical pile mounting hole 21 so that the lower end thereof can be inserted and removed, and is attached to the block 15 in a state of projecting from the upper surface of the block 15 at a substantially right angle. The standing pile 16 is made of a material that is decomposed by natural corrosive action and reduced to the soil, such as wood or bamboo, and has a hook-like shape for attaching a cover-sliding prevention material 17 to the upper and lower ends. A fastener 26 is provided. And this standing pile 16 is attached to each standing pile mounting hole 21 one by one after the block 15 is laid on the slope 11.

  The soil covering slip prevention material 17 has a cloth shape or a net shape, and has a cylindrical portion 17a at each position corresponding to the standing pile mounting hole 21 in each block 15 connected in a multiple form. Yes. The covering soil slip prevention material 17 is attached by covering the cylindrical portion 17 a from the upper side of the standing pile 16 and hooking a part of the cylindrical portion 17 a on the fastener 26 of the standing pile 16. Alternatively, the cover-sliding prevention material 17 may be folded to sew the tubular portion 17a portion into a bag shape, and may be attached to the standing pile 16. And the covering soil sliding prevention material 17 is stretched | stretched one by one between the standing piles 16 and 16 ... sequentially.

  Note that the soil covering slip prevention material 17 uses knitted fibers (coconut shell fibers) extracted from hemp or coconut husks, or fibers synthesized with plant resources such as corn. Hemp and coconut husk fibers are biodegradable natural materials that are decomposed by natural corrosive action and reduced to the soil after a considerable period of time has elapsed since laying.

  Next, the procedure of the bank protection construction using the bank protection structure 12 comprised in this way is demonstrated using FIGS. First, as shown in FIG. 2, the blocks 15, 15... Connected in a multiplex manner are regularly laid in the vertical or horizontal direction on the slope 11 at the construction position. Next, the vertical pile 16 is inserted into the vertical pile mounting hole 21 and the vertical pile 16 is erected on the blocks 15, 15. After that, each of the standing piles 16, 16... Is covered with the cylindrical portion 17a in order, and the covering soil slip prevention material 17 is attached to the standing piles 16, 16,. In this case, the soil covering slip prevention material 17 is attached along the flowing water direction, and the height of the curtain is substantially the same as the height of the standing pile 16 or about 10 cm lower, and is about 20 to 50 cm. 2 and 3 show this state. In addition, the lower side of the soil covering slip prevention material 17 may be made slightly longer so that a part thereof covers the blocks 15, 15. In addition, in order to simplify the laying of the soil covering slip-off prevention material 17 and prevent the vertical pile from falling, and to eliminate the slack after the laying, wires or biodegradable ropes are used as cores on the upper and lower ends of the soil covering slip-off prevention material 17 It is also possible to use a structure that allows the wire to pass through.

  Next, for example, earth and sand are put on the blocks 15, 15, etc. so as to be filled with the covering soil slip prevention material 17 stretched along the flowing water direction, and the covering soil slip prevention material 17 is covered with the earth and sand until it is hidden. Furthermore, when it is covered with soil 13 for vegetation, it is completed. FIG. 1 shows the state after completion. In addition, if earth and sand are put on the blocks 15, 15 ..., covering with the soil 13 for vegetation is not necessarily required.

  In river embankments where such revetment work has been performed, vegetation 14 is planted on the soil 13 covering the surface of the river embankment 10 or grows as necessary. This plant 14 is rooted with the passage of time, and the root is entangled with the soil covering slip prevention material 17, the standing pile 16 and the like, and is formed by the gap S1 between the blocks 15, 15. Are inserted into the slope 11 through the clearance S2 and the lift reduction holes 22 respectively formed in the blocks 15, 15... To make the levee stronger.

  Next, the operation will be described. For example, when flooding occurs and the surface of the embankment is scoured with running water, if a force exceeding a predetermined level is applied to the vertical pile 16, the vertical pile 16 is removed from the vertical pile mounting hole 21, and the blocks 15, 15,. The part that was installed in the building collapses. By this collapse, the standing pile 16, the soil covering slip prevention material 17 and the earth and sand flow out, respectively, and the resistance applied to the blocks 15, 15... Laid on the slope 11 is reduced, and only the blocks 15, 15. Further, the remaining blocks 15, 15... Are substantially flat, so that they do not receive much resistance to running water and remain as they are.

  Therefore, according to this structure, when a force of a predetermined level or more is applied to the vertical pile 16 due to flooding, the vertical pile 16 is removed from the vertical pile mounting holes 21 of the blocks 15, 15. Since the upper part of the upper surface of ... is intentionally collapsed and flowed and the blocks 15, 15 are left on the slope 11 etc., the restoration work is not the construction from the beginning, but the block 15 , 15 ... from the construction after laying. As a result, it is possible to shorten the construction period and reduce the construction cost at the time of restoration. In addition, since the blocks 15, 15... Which are the pedestals are left as they are on the slope 11, the slope 11 can be prevented from being eroded by running water scouring, and damage can be minimized. Will be able to.

  In addition, the piles 16 that have collapsed and flowed are made of wood or bamboo, and the cover-sliding prevention material 17 is formed of a biodegradable natural material, both of which are decomposed by natural corrosive action and returned to the soil. Therefore, even if it is left spilled, it does not affect the environment. Therefore, in the restoration work, it is not necessary to proceed with the collapsed pile 16 and the soil covering slip prevention material 17 at the same time, so that the restoration work can be further simplified.

  Further, since the side surfaces of the blocks 15 and 15 are rounded, as shown in FIG. 10 (a), the blocks 15 and 15 can rotate smoothly at the contact points. Accordingly, as shown in FIG. 11 showing the operation sequence at the time of construction, even in the case where there are gradient change points such as a shoulder and a butt, the order of (a) to (d) in FIG. Since it changes automatically, multiple blocks 15 and 15 can be installed collectively. Incidentally, as shown in FIGS. 10B and 10C, if the side surfaces of the blocks 15 and 15 are not rounded, the blocks interfere with each other at the contact points and smooth rotation cannot be achieved.

(Another example of standing pile)
FIG. 12 shows another embodiment of the standing pile applicable to the revetment structure in the present invention. The standing pile 27 shown in FIG. 12 can be used in place of the standing pile 16 shown in FIGS. 1 to 11, and the components other than the standing pile 27 are the same as those in FIGS. 1 to 11. A duplicate description will be omitted.

  In FIG. 12, the standing pile 27 is composed of a fixture 27A and a pile portion 27B that is detachably attached to the fixture 27A, and has a circular cross-section as a whole and a rod shape having a length of about 30 to 50 cm. It is a material.

  27 A of fixtures are comprised by the lower side attaching part 28 attached to the vertical pile attaching hole 21 of the block 15,15 ..., and the upper side attaching part 29 attached to the upper part of this lower side attaching part 28 via the pivot 30. Has been. Further, the lower mounting portion 28 and the upper mounting portion 29 are rotatable with respect to each other about the pivot 30 as a fulcrum. Note that a friction member (not shown) is provided between the lower mounting portion 28 and the upper mounting portion 29, and unless a predetermined force or more is applied between the lower mounting portion 28 and the upper mounting portion 29. The attachment 27A is maintained in a state of being straightly extended in the vertical direction without rotating between the two.

  A pile attachment hole 31 is provided on the upper surface of the upper attachment portion 29. In this pile attachment hole 31, the lower end of the pile portion 27B is detachably inserted and attached. The pile 27B is made of a material that is decomposed by natural corrosive action and reduced to soil, such as wood. Furthermore, a hook-like fastener 26 for attaching the covering soil slip prevention material 17 is provided in a part of the pile portion 27B and the upper attachment portion 29.

  And the standing pile 27 comprised in this way is inserted in the standing pile attachment hole 21 of the block 15,15 ... by inserting the lower attachment part 28 of the fixture 27A, respectively, and is attached to each block 15,15 ..., respectively. In addition, attachment of the lower side attachment part 28 with respect to the standing pile attachment hole 21 may be either attachment in the state which can be fixed by non-detachable or easily removable. However, in the case of a structure that can be easily removed, the fixture 27A is preferably configured around a member that is reduced to the soil. In the case of a fixed structure, the synthetic resin material that is resistant to corrosion, etc. Can be used.

  Next, the pile portion 27B is removably attached to the upper attachment portion 29 of the attachment 27A attached to each block 15, 15, and this pile portion 27B is erected on the blocks 15, 15,. . In this case, the falling direction of the upper mounting portion 29 is made to coincide with the flowing water direction. After that, each of the standing piles 27, 27... Is covered with the cylindrical portion 17a of the covering soil slip prevention material 17 in order, and the covering soil slip prevention material 17 is attached to the standing piles 27, 27. In this case, the vertical piles 27, 27... Are attached so that the falling direction of the vertical piles 27, 27,. The height of the curtain is about 30 to 50 cm, which is substantially the same as the height of the pile portion 27B.

  Then, for example, earth and sand are put on the blocks 15, 15... So as to be filled with the covering soil slip prevention material 17 stretched at the front and rear positions with respect to the flowing water direction. Is covered to the extent that it is hidden, and then covered with vegetation soil 13 to complete.

  Next, the operation will be described. For example, when flooding occurs and the surface of the embankment is scoured with running water, etc., when a force exceeding a predetermined level is applied to the vertical pile 27, first, the upper mounting portion 29 is pivoted on the pivot 30 and the pile portion 27B is covered with the soil. It turns over in the downstream direction of a water flow with the prevention material 17, and the part constructed on the blocks 15, 15 ... collapses by this turning over. When further force is applied, the pile portion 27B is removed from the upper attachment portion 29, or the entire vertical pile 27 is removed from the vertical pile attachment hole 21, and the pile portion 27B or the vertical pile 27, the soil covering slip-off preventing material 17 and the earth and sand are respectively removed. Only the blocks 15, 15... That flow out and are substantially flat on the slope 11 are arranged. As a result, the resistance applied to the blocks 15, 15... Is reduced, and only the blocks 15, 15.

  Therefore, even when this vertical pile 27 is used, when a force of a predetermined level or more is applied to the vertical pile 27 due to flooding, at least the pile portion 27B is from the pile mounting hole 31 of the fixture 27A on the block 15, 15. It is extracted in the direction of running water, and the part above the upper surface of the blocks 15, 15... Is intentionally collapsed to flow, leaving the blocks 15, 15. As a result, the restoration work is not the construction from the beginning, but the construction after the blocks 15, 15,... Are laid, so that the construction period and the construction cost at the time of restoration can be shortened.

(Still another example of vertical pile)
FIG. 13 shows still another embodiment of a standing pile applicable to the revetment structure according to the present invention. The standing pile 35 shown in FIG. 13 can be used in place of the standing pile 16 shown in FIGS. 1 to 11 and is substantially the same as FIGS. A duplicate description will be omitted with reference numerals.

  In FIG. 13, the upright pile 35 is composed of a fixture 35 </ b> A and a pile portion 35 </ b> B rotatably attached to the fixture 35 </ b> A, and the overall length is about 30 to 50 cm.

  The fixture 35A is fixed to the metal rod-like base material 36 having a loop portion 36a on one end side and a screw 36b on the other end side, and spot welding or the like on both side surfaces of the loop portion 36a. It consists of metal plates 37 and 37. Further, a mounting hole 38 is provided in the center of each of the plates 37 and 37 so as to penetrate from side to side. The mounting tool 35A is pre-embedded with an insert nut for fastening the screw 36b on the other end side when the block 15 is manufactured, or is screwed into the mounting hole 21 provided in the block 15 later. And the loop portion 36a on one end side is attached in a state of projecting straight from the upper surface of the block 15 at a right angle. In addition, when attaching the other end side to the attachment hole 21, the part of the screw 36b is firmly fixed to the block 15 using a coagulant or the like.

  The pile portion 35B is a metal rod-like material, and integrally includes a main body portion 39a and a mounting portion 39b in which a part of the lower end side of the main body portion 39a is bent in an L shape, and the outer periphery of the mounting portion 39b. A screw 39c is engraved. The diameter of the mounting portion 39b is substantially equal to the inner diameter of the mounting hole 38 on the mounting tool 35A side. And when attaching this pile part 35B to the fixture 35A, first, it makes it the state which penetrates from one side surface of the fixture 35A to another side surface, and inserts the attachment part 39b in the attachment hole 38. FIG. Subsequently, when the nut 40 is attached to the screw 39c on the other side surface of the attachment 39A, and the attachment 35A is tightened by a part of the nut 40 and the main body portion 39a, the attachment 35A can be attached. In this attachment, the main body 39 a of the pile portion 35 </ b> B is held in a state of being substantially perpendicular to the upper surface of the block 15. When a force equal to or greater than the tightening force is applied to the pile portion 35B from the outside, the attachment portion 39b rotates in the attachment hole 38, and the pile portion 35B is turned over.

  And after arranging the block 15 in the predetermined | prescribed position which needs a revetment, the said standing pile 35 is fixed to the attachment hole 21 of the block 15 in the procedure mentioned above, and a covering soil sliding prevention material is attached to each standing pile 35,35 .... The cylindrical cover 17a is covered in order, and the covering soil slip prevention material 17 is attached so as to stretch the curtain. Also in this case, the pile portion 35B is attached so that the falling direction of the pile portion 35B is directed to the flowing water direction and the covering soil slip prevention material 17 is parallel to the flowing water direction.

  Even in this structure, for example, when a flood occurs and a force exceeding a predetermined value is applied to the standing pile 35, the pile portion 35B is turned around the mounting portion 39b as a pivot, and the portion that has been constructed on the blocks 15, 15. Collapses and flows, and the blocks 15 and 15 remain on the slope. As a result, the restoration work is not the construction from the beginning, but the construction after the blocks 15, 15,... Are laid, so that the construction period and the construction cost at the time of restoration can be shortened.

  Further, as shown in FIG. 14, the connecting metal fitting 18 is composed of a metal material 180A and a suspension metal member 180B, each of which is formed by bending a reinforcing bar, and the metal member 180A and the suspension metal member 180B are fixed to each other by welding or the like. A washer 180C having a mounting hole 180a opened may be welded to the metal material 180A, and the ends 20a and 20a of the reinforcing bar 20 shown in FIG. 4 may be inserted and fixed by nut tightening.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

Sectional drawing which shows the revetment after the construction which applied this invention. The top view of the seawall apparatus shown as embodiment of this invention. The side view of the revetment apparatus in this embodiment. The top view shown in the state before a vertical pile and a covering soil sliding prevention material are attached by the elements on larger scale of the revetment apparatus in this embodiment. The side view shown in the state before a vertical pile and a covering-sliding fall prevention material are attached by the elements on larger scale of the revetment apparatus in this embodiment. It is an enlarged view of the connection metal fitting used with the seawall apparatus in this embodiment, (a) is the top view, (b) is the side view. The expanded side view which shows another Example of the connection metal fitting used with the seawall apparatus in this embodiment. The figure explaining the laying method of the block in the seawall apparatus of this embodiment. It is the elements on larger scale of the revetment apparatus in this embodiment, The top view shown in the state which attached the vertical pile to the vertical pile attachment hole of a block, (b) is a side view which shows a part in cross section. It is a figure explaining the effect of this embodiment in contrast with the conventional structure, (a) is a structural diagram of this embodiment, (b) and (c) are conventional structural diagrams. The figure which shows the example of 1 construction of the block by this embodiment. It is the elements on larger scale which show another Example of the seawall apparatus in this embodiment, and is the top view shown in the state which attached the vertical pile to the vertical pile attachment hole of a block, (b) is a side surface which shows a partly cross section The figure (c) is a side view showing the state where the vertical pile is turned over. It is the elements on larger scale which show another Example of the seawall apparatus in this embodiment, and is the front view which shows a part in cross-section in the state which attached the vertical pile to the vertical pile attachment hole of the block, (b) The side view which shows a part in cross section. The figure which shows the modification of the coupling metal fitting which can be used by this embodiment.

Explanation of symbols

10 River Embankment 11 Slope 12 Revetment Structure (Revetment Equipment)
15 Block 16 Standing pile 17 Covering slip prevention material 18 Connecting bracket 18c Hanging part 18d Mounting hole 20 Reinforcing bar 20a Both ends 21 Standing pile mounting hole 22 Lifting reduction hole 25 Lifting tool 27 Standing pile 27A Mounting tool 27B Pile part 28 Lower mounting part 29 Upper mounting part 30 Axis 31 Pile mounting hole

Claims (7)

In the river revetment device that covers the slope of the river embankment and protects the slope from the erosion of running water,
The levee method has at least one attachment hole penetrating the fixture or the upper and lower surfaces, and has a substantially flat surface and rounded side surfaces in order to reduce running water resistance. A block laid on the surface,
A vertical pile attached to the fixture or the attachment hole of the block;
With a covering soil slip prevention material consisting of a cloth or net-like material attached to the vertical pile,
River revetment constructed so that when a predetermined force or more is applied to the standing pile by running water, the standing pile is turned over or removed from the fitting or the attachment hole in the running water direction. apparatus.   2. The river bank protection apparatus according to claim 1, wherein the covering material is prevented from slipping down by the covering material sliding prevention material so that the vegetation is stabilized.   The riverbank revetment apparatus according to claim 1 or 2, wherein the covering material is made of a natural material having biodegradability and is not required to be recovered when it is removed during a flood.   The river revetment device according to claim 1, 2 or 3, characterized in that at least one hole or slit for penetrating the upper and lower surfaces of the block to reduce the lift of running water and to allow the plant to take root is provided. .   The adjacent blocks are connected to each other in a foldable manner by a connecting bracket to form a multiple block, and the gap between the blocks can be adjusted by adjusting the connecting width of the connecting bracket. River revetment device according to 1, 2, 3, or 4.   The connecting bracket is provided with a suspending portion so that the plurality of blocks can be lifted substantially horizontally, and the plurality of blocks are collectively formed in a plurality of vertical and horizontal directions with respect to the slope. 6. The river revetment apparatus according to claim 5, wherein the river revetment apparatus can be installed. In the river revetment method of covering the slope of the river embankment and protecting the slope from the erosion of running water,
A plurality of flat blocks are laid on the slope of the levee, and a vertical pile that can be turned over or removed from the upper surface of the block, and a cloth or net-like soil covering slip prevention material attached to the vertical pile While installing on the block,
A river revetment construction method constructed so that the vertical pile is turned over or removed from the attachment or the attachment hole when a force of a predetermined level or more is applied to the covering soil sliding prevention material by running water.

Images