Lifting unit, lifting structure, and method for installing a lifting unit

Abstract

To provide a light-weight raising unit manufacturable and installable at low cost.SOLUTION: A raising unit which raises a dike having an upper face and an inclined plane inclined to a water area side comprises an L-shaped resin hollow block having a hollow tabular base part and a hollow tabular wall part vertically erected from the base part, a bracket having a wall plate, a base plate inclined in relation to the wall plate and extended downward of one face side of the wall plate from a lower end of the wall plate and a ridge-like sealing part protruded to the other face side of the wall plate along a connection part of the wall plate with the base plate, and anchors for fixing a base part of the hollow block to the upper face of the dike. When the raising unit is installed on the dike, the wall part of the hollow block is directed to the water area side of the dike, the wall plate of the bracket abuts on the wall part of the hollow block, the base plate of the bracket abuts on an inclined plane of the dike, and the sealing part of the bracket is positioned between the hollow block and the dike.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lifting unit, a lifting structure, and a method for installing the lifting unit.

Background Art

[0002] With the recent frequent occurrence of floods, it has been desired to raise the levees provided in rivers and the like. As an example of a method for raising a levee, Patent Document 1 describes that a precast concrete levee raising structure is continuously arranged along the extension direction of the levee at the top end position of an existing levee.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The raising method described in Patent Document 1 requires a lot of costs for the manufacture and installation of the raising structure. Further, since the weight of the raising structure is large, when the soil under the levee is not firm, the levee may sink due to the weight of the raising structure, and sufficient raising may not be achieved.

[0005] An object of the present invention is to provide a lifting unit, a lifting structure, and a method for installing the lifting unit that can be manufactured and installed at low cost and are lightweight.

Means for Solving the Problems

[0006] According to a first aspect of the present invention, a lifting unit for raising a levee having an upper surface and an inclined surface inclined from the upper surface toward the water area side, A hollow block made of resin having a hollow plate-like base and a hollow plate-like wall portion standing upright from the base and having an L-shaped cross section, A bracket having a wall plate, a base plate inclined with respect to the wall plate and extending downward from the lower end portion of the wall plate to the lower side of one surface side of the wall plate, and a ridge-shaped sealing portion protruding to the other surface side of the wall plate along the connection portion between the wall plate and the base plate, An anchor for fixing the base of the hollow block to the upper surface of the levee is provided, When the raising unit is installed on the levee, the wall portion of the hollow block is directed toward the water area side of the levee, the wall plate of the bracket is brought into contact with the wall portion of the hollow block, the base plate of the bracket is brought into contact with the inclined surface of the levee, and a raising unit is provided in which the sealing portion of the bracket is located between the hollow block and the levee.

[0007] In the raising unit of the first aspect, the hollow block may include a first connection portion provided on one end side in a direction along the connection portion between the base portion and the wall portion, and a second connection portion provided on the other end side in the direction. The first connection portion may have a first surface orthogonal to the thickness direction of the wall portion, and the second connection portion is a second surface orthogonal to the thickness direction of the wall portion and may have a second surface configured to contact the first surface of the first connection portion of another hollow block installed adjacent to the hollow block.

[0008] In the raising unit of the first aspect, the hollow block may have ribs formed by constrictions of the hollow block.

[0009] In the raising unit of the first aspect, the height of the wall plate of the bracket may be 1 / 3 or less of the height of the wall portion of the hollow block.

[0010] In the raising unit of the first aspect, an opening for injecting a weight into the hollow block may be provided in the hollow block.

[0011] In the lifting unit of the first aspect, the hollow block may be provided with a discharge port for discharging the gas inside the hollow block when the weight is put therein.

[0012] In the lifting unit of the first aspect, the bracket may include a first connection portion provided on one end side in the direction along the connection portion between the base plate and the wall plate, and a second connection portion provided on the other end side in the direction. The first connection portion may have a first surface orthogonal to the thickness direction of the wall plate, and the second connection portion is a second surface orthogonal to the thickness direction of the wall plate, and may have a second surface configured to abut against the first surface of the first connection portion of another bracket installed adjacent to the bracket.

[0013] In the lifting unit of the first aspect, the anchor may be a pivotal anchor having an anchor portion driven into the ground and a rod portion pivotally connected to the anchor portion.

[0014] The lifting unit of the first aspect may further include a road surface forming plate installed on the base portion of the hollow block.

[0015] According to the second aspect of the present invention, a lifting structure including a plurality of lifting units installed continuously in the extending direction of the dike, a lifting structure is provided in which each of the plurality of lifting units is a lifting unit of the first aspect.

[0016] In the second aspect of the present invention, at least one of the hollow blocks of the plurality of lifting units may be curved along the extending direction of the dike.

[0017] According to the third aspect of the present invention, a method of installing the lifting unit of the first aspect on the dike, fixing the hollow block to the dike using the anchor, and injecting a weight into the hollow block. A method including this is provided.

Advantages of the Invention

[0018] The lifting unit and the lifting structure of the present invention can be manufactured and installed at low cost and are lightweight. The installation method of the lifting unit of the present invention can install a lightweight lifting unit manufactured at low cost at low cost.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0020] <Embodiment> The raised unit 100 of the embodiment of the present invention and its installation method will be described by taking the case where the raised unit 100 is installed on a river levee EM to form a raised structure 1000 as an example.

[0021] [Overall Configuration] As shown in Fig. 1, the raised unit 100 mainly includes a block 10 disposed on the upper surface of the levee EM, a bracket 20 disposed on the river side of the block 10, a main anchor 31 and a sub-anchor 32 for fixing the block 10 to the levee EM, a bracket anchor 40 for fixing the bracket 20 to the levee EM, and a road surface forming plate 50 disposed on the block 10.

[0022] [Block 10] The block 10 (Figs. 2 to 4) is a hollow block body integrally formed of resin. The resin can be, for example, high-density polyethylene. The block 10 can be formed, for example, by blow molding of resin.

[0023] Block 10 has a main body portion 11, and connecting portions 12 and 13 provided at both end portions of the main body portion 11. The main body portion 11 mainly has a hollow plate-shaped base portion 111 and a hollow plate-shaped wall portion 112.

[0024] In block 10, the direction in which the connecting portions 12 and 13 sandwich the main body portion 11 is called the width direction. Also, the direction orthogonal to the width direction and extending along the base portion 111 is called the front-rear direction, and the direction orthogonal to the width direction and extending along the wall portion 112 is called the up-down direction.

[0025] In the front-rear direction, the side where the wall portion 112 exists is taken as the front, and the opposite side is taken as the rear. In the up-down direction, the side where the base portion 111 exists is taken as the bottom, and the opposite side is taken as the top. In the width direction, the left side and the right side in the state of looking from the rear to the front are taken as the left side and the right side, respectively.

[0026] [Main body portion 11] The base portion 111 is a hollow plate-shaped portion constituted by a top plate 111a, a bottom plate 111b, a rear plate 111d, a left plate 111e, and a right plate 111f.

[0027] The top plate 111a (Fig. 4(b)) is a substantially flat plate inclined such that the rear end portion is located below the front end portion. The top plate 111a has a curved portion cv where the top plate 111a curves upward in the vicinity of its front end portion 111 having it.

[0028] The bottom plate 111b (Fig. 4(b)) is a substantially flat plate extending in a plane orthogonal to the up-down direction and is opposed to the top plate 111a in the up-down direction. The bottom plate 111b has a curved portion CV where the bottom plate 111b curves upward in the vicinity of its front end portion 111 having it.

[0029] The rear plate 111d (Fig. 4(b)) curves so as to bulge upward and rearward, and connects the rear end portion of the top plate 111a and the rear end portion of the bottom plate 111b.

[0030] The left plate 111e (Figs. 2 and 3) is a flat plate extending in a plane orthogonal to the width direction, connecting the left end portions of the top plate 111a, the bottom plate 111b, and the rear plate 111d. The right plate 111f (Figs. 2 and 3) is a flat plate extending in a plane orthogonal to the width direction, connecting the right end portions of the top plate 111a, the bottom plate 111b, and the rear plate 111d.

[0031] Inside the base 111, there is a space (hollow) H surrounded by the top plate 111a, the bottom plate 111b, the rear plate 111d, the left plate 111e, and the right plate 111f 111 which is defined.

[0032] The wall portion 112 is a hollow plate-like portion composed of a front plate 112c, a rear plate 112d, a left plate 112e, a right plate 112f, and a top plate 112a.

[0033] The front plate 112c (Fig. 4(b)) is a substantially flat plate extending in a plane orthogonal to the front-rear direction. The front plate 112c has a curved portion CV where the front plate 112 curves rearward in the vicinity of its lower end portion 112 which it has.

[0034] The curved portion CV of the front plate 112c 112 is connected to the curved portion CV of the bottom plate 111b of the base 111 111 so that the front plate 112c and the bottom plate 111b are connected. In the vicinity of the connection portion between the front plate 112c and the bottom plate 111b, there is a curved portion CV 112 and the curved portion CV 111 which forms a curved portion CV curved to protrude downward and forward. 11 is formed.

[0035] The rear plate 112d (Fig. 4(b)) is a substantially flat plate inclined such that its lower end portion is located rearward of its upper end portion, facing the front plate 112c in the front-rear direction. The rear plate 112d has a curved portion cv where the rear plate 112d curves rearward in the vicinity of its lower end portion 112 which it has.

[0036] The curved portion cv of the rear plate 112d 112 is connected to the curved portion cv of the top plate 111a of the base 111 111By being connected thereto, the rear plate 112d and the top plate 111a are connected. Near the connection portion between the rear plate 112d and the top plate 111a, there is a curved portion cv 112 and the curved portion cv 111 and, a curved portion cv is formed so as to be convex downward and forward 11 is formed.

[0037] The top plate 112a (FIG. 4(b)) is curved so as to be convex upward and rearward, and connects the upper end portions of the front plate 112c and the rear plate 112d.

[0038] The left plate 112e (FIGS. 2 and 3) is a flat plate extending in a plane orthogonal to the width direction, and connects the left end portions of the front plate 112c, the rear plate 112d, and the top plate 112a. The lower end portion of the left plate 112e is connected to the front end portion of the left plate 111e of the base portion 111. The left plate 11e of the main body portion 11 is constituted by the left plate 111e and the left plate 112e that are flush with each other.

[0039] The right plate 112f (FIGS. 2 and 3) is a flat plate extending in a plane orthogonal to the width direction, and connects the right end portions of the front plate 112c, the rear plate 112d, and the top plate 112a. The lower end portion of the right plate 112f is connected to the front end portion of the right plate 111f of the base portion 111. The right plate 11f of the main body portion 11 is constituted by the right plate 111f and the right plate 112f that are flush with each other.

[0040] Inside the wall portion 112, a space (hollow) H surrounded by the top plate 112a, the front plate 112c, the rear plate 112d, the left plate 112e, and the right plate 112f 112 is defined. The space H 112 communicates with the space H of the base portion 111 111 is. The space H 111 and the space H 112 constitute the space H 11 is constituted.

[0041] In the main body portion 11, five ribs RB (Figs. 2 and 3) formed by the constriction of the main body portion 11 are provided at equal intervals in the width direction. Each of the five ribs RB includes a front-rear rib RB1 extending in the front-rear direction at the base portion 111 and an up-down rib RB2 extending in the up-down direction at the wall portion 112.

[0042] The front-rear rib RB1 has a shape in which the top plate 111a of the base portion 111 is recessed in a groove shape extending in the front-rear direction and the top plate 111a is brought into contact with the bottom plate 111b (Fig. 4(c)). In the front-rear rib RB1, the top plate 111a may be welded to the bottom plate 111b. The up-down rib RB2 has a shape in which the rear plate 112d of the wall portion 112 is recessed in a groove shape extending in the up-down direction and the rear plate 112d is brought into contact with the front plate 112c (Fig. 4(c)). In the up-down rib RB2, the rear plate 112d may be welded to the front plate 112c. The front end of the front-rear rib RB1 is connected to the lower end of the up-down rib RB2.

[0043] By having the rib RB, both the base portion 111 and the wall portion 112 have higher strength against bending and twisting. The internal space H of the main body portion 11 11 is separated (partitioned) into six spaces arranged in the width direction by the five ribs RB. In the present embodiment, as shown in Fig. 4(c), there is a gap between the rear end portion of the front-rear rib RB1 and the upper end portion of the up-down rib RB2, so the six spaces arranged in the width direction communicate with each other through the gap.

[0044] An injection port IN (Fig. 2) is provided in the base portion 111 of the main body portion 11. The injection ports IN are provided in six rows in the width direction in the vicinity of the curved portion cv 111 of the top plate 111a. The injection ports IN are provided one by one for each of the six spaces defined by dividing the space H 11 by the five ribs RB.

[0045] An outlet EX is provided in the wall portion 112 of the main body portion 11. The outlets EX are provided in six rows in the width direction near the upper end of the rear plate 112d. The outlets EX are also provided for the space H 11One is provided for each of the six spaces defined by being divided by five ribs RB.

[0046] [Connecting parts 12, 13] The connecting part 12 is provided at the left end of the main body part 11. The connecting part 12 has a connecting base part 121 and a connecting wall part 122.

[0047] The connecting base part 121 (FIG. 4(a)) is a substantially flat plate extending in a plane orthogonal to the vertical direction. Near the front end of the connecting base part 121, there is a curved part CV where the connecting base part 121 curves upward 121 and has. The right end of the connecting base part 121 is connected to the left plate 111e of the base part 111.

[0048] The connecting wall part 122 (FIG. 4(a)) is a substantially flat plate extending in a plane orthogonal to the front-rear direction. Near the lower end of the connecting wall part 122, there is a curved part CV where the connecting wall part 122 curves backward 122 and has. The right end of the connecting wall part 122 is connected to the left plate 112e of the wall part 112.

[0049] The curved part CV of the connecting wall part 122 122 is connected to the curved part CV of the connecting base part 121 121 so that the connecting wall part 122 and the connecting base part 121 are connected. Near the connection part of the connecting wall part 122 and the connecting base part 121, there are the curved part CV 121 and the curved part CV 122 to form a curved part CV that curves convex downward and forward 12 is formed.

[0050] The lower surface of the connecting base part 121 is located above the lower surface of the bottom plate 111b of the base part 111, and the front surface of the connecting wall part 122 is located behind the front surface of the front plate 112c of the wall part 112.

[0051] The connecting part 13 is provided at the right end of the main body part 11. The connecting part 13 has a connecting base part 131 and a connecting wall part 132 (FIG. 4(d)).

[0052] The connecting base portion 131 (FIG. 4(d)) is a substantially flat plate extending in a plane orthogonal to the vertical direction. Near the front end portion of the connecting base portion 131, there is a curved portion CV where the connecting base portion 131 curves upward. 131 The left end portion of the connecting base portion 131 is connected to the right plate 111f of the base portion 111.

[0053] The connecting wall portion 132 is a substantially flat plate extending in a plane orthogonal to the front-rear direction. Near the lower end portion of the connecting wall portion 132, there is a curved portion CV where the connecting wall portion 132 curves rearward. 132 The left end portion of the connecting wall portion 132 is connected to the right plate 112f of the wall portion 112.

[0054] The curved portion CV of the connecting wall portion 132 132 is connected to the curved portion CV of the connecting base portion 131 131 , whereby the connecting wall portion 132 and the connecting base portion 131 are connected. Near the connection portion between the connecting wall portion 132 and the connecting base portion 131, there is a curved portion CV 131 and the curved portion CV 132 which forms a curved portion CV curved so as to protrude downward and forward. 13 is formed.

[0055] The lower surface of the connecting base portion 131 is flush with the lower surface of the bottom plate 111b of the base portion 111, and the front surface of the connecting wall portion 132 is flush with the front surface of the front plate 112c of the wall portion 112. Also, the lower front surface of the curved portion CV 13 is flush with the lower front surface of the curved portion CV 11 of the main body portion 11.

[0056] [Through holes TH1, TH2, TH3] In addition, in the block 10, there are provided three through holes TH1 each for fixing the block 10 to the dike EM by the main anchor 31, three through holes TH2 each for fixing the block 10 to the dike EM by the sub-anchor 32, and three through holes TH3 each for connecting the block 10 and the bracket 20.

[0057] The through hole TH1 is provided at the curved portion CV of the connecting base portion 121 of the connecting portion 12 121In the vicinity of and the curved portion CV of the connecting base portion 131 of the connecting portion 13 131 In the vicinity of and provided near the front ends of the front and rear ribs RB1 of the rib RB located at the central portion in the width direction. The through hole TH1 is provided on the front side of the central portion in the front-rear direction of the block 10 (and / or the central portion in the front-rear direction of the bottom plate 111b).

[0058] The through hole TH2 is provided in the vicinity of the rear end of the connecting base portion 121 of the connecting portion 12, in the vicinity of the rear end of the connecting base portion 131 of the connecting portion 13, and near the rear ends of the front and rear ribs RB1 of the rib RB located at the central portion in the width direction.

[0059] The through hole TH3 is in the vicinity of the curved portion CV of the connecting wall portion 122 of the connecting portion 12 122 In the vicinity of and the curved portion CV of the connecting wall portion 132 of the connecting portion 13 132 In the vicinity of and provided near the lower ends of the upper and lower ribs RB2 of the rib RB located at the central portion in the width direction.

[0060] [Dimensions, etc.] In the main body portion 11 of the block 10 having the above configuration, the front plate 112c of the wall portion 112 and the bottom plate 111b of the base portion 111 are orthogonal, and the wall portion 112 stands upright from the base portion 111. The block 10 is L-shaped when viewed in the width direction.

[0061] The height of the wall portion 112 (the height from the lower surface of the bottom plate 111b of the base portion 111 to the upper end portion of the front plate 112c of the wall portion 112) can be, for example, about 300 mm to 700 mm. The length of the base portion 111 (the length from the front surface of the front plate 112c of the wall portion 112 to the rear end portion of the bottom plate 111b of the base portion 111) can be, for example, about 300 mm to 700 mm. The height of the wall portion 112 and the length of the base portion 111 may be the same.

[0062] The length in the width direction of the main body portion 11 can be, for example, about 1000 mm to 2000 mm. The lengths in the width direction of the connecting portions 12 and 13 can be, for example, about 50 mm to 200 mm.

[0063] [Bracket 20] The bracket 20 (Figs. 5 and 6) is a hollow body integrally formed of resin. The resin can be, for example, high-density polyethylene. The bracket 20 can be formed, for example, by blow molding of resin.

[0064] The bracket 20 mainly has a base plate portion 21, a wall plate portion 22, and a ridge-shaped sealing portion 23.

[0065] In the bracket 20, the direction in which the sealing portion 23 extends is called the width direction. Also, the direction orthogonal to the width direction and extending along the wall plate portion 22 is called the vertical direction, and the direction orthogonal to the width direction and the vertical direction is called the front-rear direction.

[0066] In the front-rear direction, the side where the base plate portion 21 exists with respect to the wall plate portion 22 is defined as the front, and the opposite side is defined as the rear. In the vertical direction, the side where the wall plate portion 22 exists with respect to the base plate portion 21 is defined as the upper, and the opposite side is defined as the lower. In the width direction, the left side and the right side in the state of looking from the rear to the front are defined as the left side and the right side, respectively.

[0067] The base plate portion 21 is a hollow rectangular plate having the width direction as the longitudinal direction, and has an upper surface 21a and a lower surface 21b. The base plate portion 21 is inclined such that the front end portion is positioned lower than the rear end portion. The lower surface 21b of the base plate portion 21 is a flat surface.

[0068] The wall plate portion 22 is a rectangular plate having the width direction as the longitudinal direction, and has a front surface 22c and a rear surface 22d. The rear surface 22d of the wall plate portion 22 is a flat surface. The lower end portion of the wall plate portion 22 is connected to the rear end portion (upper end portion) of the base plate portion 21.

[0069] The front surface 20c of the bracket 20 is formed by the upper surface 21a of the base plate portion 21 and the front surface 22c of the wall plate portion 22. The front surface 20c is a curved surface curved so as to be convex toward the lower rear.

[0070] The sealing portion 23 is a ridge-shaped portion that protrudes rearward from the connection portion between the base plate portion 21 and the wall plate portion 22 and extends in the width direction.

[0071] The upper surface 23a of the sealing portion 23 is a curved surface that extends downward and rearward from the lower end portion of the rear surface 22d of the wall plate portion 22. The upper surface 23a is curved so as to be convex downward and forward.

[0072] The lower surface 23b of the sealing portion 23 is a curved surface that extends upward and rearward from the upper end portion of the lower surface 21b of the base plate portion 21. The lower surface 23b is curved so as to be convex upward and forward.

[0073] The rear surface 23d of the sealing portion 23 is a flat surface that extends in a plane perpendicular to the front-rear direction. The rear surface 23d connects the upper surface 23a and the lower surface 23b.

[0074] A first connection recess CR1 is provided at the left end portion of the bracket 20. In the first connection recess CR1, the sealing portion 23 does not exist, and the lower surface 21b of the base plate portion 21 and the rear surface 22d of the wall plate portion 22 are recessed (FIG. 6(a)).

[0075] A second connection recess CR2 is provided at the right end portion of the bracket 20. In the second connection recess CR2, the front surface 20c of the bracket 20 is recessed (FIG. 6(c)).

[0076] In addition, the bracket 20 is provided with two through holes TH4 each for fixing the bracket 20 to the dike EM by the bracket anchor 40, and two through holes TH5 each for connecting the block 10 and the bracket 20.

[0077] The through hole TH4 is provided near the front end of the base plate portion 21 inside each of the first connection recess CR1 and the second connection recess CR2. The through hole TH5 is provided near the upper end of the wall plate portion 22 inside each of the first connection recess CR1 and the second connection recess CR2.

[0078] [Dimensions, etc.] In the bracket 20 having the above-described configuration, the inclination angle θ of the base plate portion 21 with respect to the wall plate portion 22 (see Fig. 6(b). The inclination angle of the lower surface 21b of the base plate portion 21 with respect to the rear surface 22d of the wall plate portion 22 as viewed in the width direction) can be, for example, about 110° to 120° or about 125° to 135°. That is, the bracket 20 of the present embodiment includes two types of brackets having different inclination angles θ from each other.

[0079] The height of the wall plate portion 22 (the dimension along the rear surface 22d from the lower end portion of the rear surface 23d of the sealing portion 23 to the upper end portion of the rear surface 22d of the wall plate portion 22 (the dimension in the vertical direction)) can be, for example, about 100 mm to 200 mm. In the present embodiment, the height of the wall plate portion 22 is 1 / 3 or less of the height of the wall portion 112 of the block 10. Further, the height of the base plate portion 21 (the dimension along the lower surface 21b from the rear surface 22d of the wall plate portion 22 (the position of the rear surface 22d in the front-rear direction) to the front end portion of the lower surface 21b of the base plate portion 21) can be, for example, about 100 mm to 200 mm. The height of the wall plate portion 22 and the height of the base plate portion 21 may be the same.

[0080] The length of the bracket 20 in the width direction can be, for example, about 800 mm to 2000 mm. The lengths of the first connection recess CR1 and the second connection recess CR2 in the width direction can be, for example, about 50 mm to 150 mm. The dimensions of the bracket 20 in the vertical direction, the front-rear direction, and the width direction are each smaller than the dimensions of the block 10 in the vertical direction, the front-rear direction, and the width direction, etc.

[0081] [Main anchor 31, sub-anchor 32, bracket anchor 40] The main anchor 31 is a pivot anchor in the present embodiment. As shown in Fig. 7, the main anchor 31 has an anchor portion 311 and a rod portion 312. A concave hole 311h is provided in the anchor portion 311. The anchor portion 311 and the rod portion 312 are pivotally connected at a connection portion 313.

[0082] The sub-anchor 32 and the bracket anchor 40 are L-shaped anchors in the present embodiment.

[0083] [Pavement forming plate 50] The pavement forming plate 50 (Fig. 1) can be, for example, a plate-shaped member formed of resin, concrete, metal, etc. As the resin, for example, high-density polyethylene can be used. The pavement forming plate 50 has an upper surface 50a on which grooves and protrusions for anti-slip are formed.

[0084] [Installation method] Specifically, the lifting unit 100 is installed on the dike EM as follows.

[0085] (1) As shown in Fig. 8(a), a recess R is formed in the river-side region of the upper surface of the dike EM. Also, if necessary, the inclination angle of the inclined surface SL that inclines from the upper surface of the dike EM toward the river side is adjusted.

[0086] Here, the adjustment of the inclination angle of the inclined surface SL is performed so that the angle of the inclined surface SL with respect to the vertical direction coincides with or approximates either of the two inclination angles θ of the bracket 20. Thereby, it becomes easy to realize a good installation state in which the bracket 20 abuts against the block 10 and the dike EM (details will be described later).

[0087] (2) As shown in Figs. 8(b) and 9(a), the main anchor 31 is driven into the bottom surface Rb of the recess R (a part of the upper surface of the dike EM). Specifically, one end of a driving rod (not shown) is inserted into the concave hole 311h of the anchor part 311, and the other end of the driving rod is struck to drive the anchor part 311 into the ground. Then, the driving rod is removed, and the rod 312 is pulled upward. As a result, the anchor part 311 pivots with respect to the rod 312, and the main anchor 31 is installed in the ground in a state where the side surface with a large area of the anchor part 311 is orthogonal to the extending direction of the rod 312 (that is, in a state having a large pull-out resistance).

[0088] (3) As shown in FIGS. 8(c) and 9(b), a plurality of blocks 10 are arranged along the extending direction of the dike EM. Each of the blocks 10 is installed such that the width direction of the block 10 coincides or substantially coincides with the extending direction of the dike EM, and the front plate 112c of the wall portion 112 faces the river side. The block 10 is arranged in the recess R such that the rod 312 of the main anchor 31 through which each of the three through holes TH1 has been installed passes therethrough.

[0089] A certain block 10 (hereinafter, appropriately referred to as the "reference block") is arranged such that the connecting portion 12 of the reference block 12 overlaps the connecting portion 13 of the block 10 (hereinafter, appropriately referred to as the "adjacent block") arranged adjacent to the left side of the certain block 10. In this state, the through holes TH1, TH2, and TH3 provided in the connecting portion 12 of the reference block respectively overlap the through holes TH1, TH2, and TH3 provided in the connecting portion 13 of the adjacent block.

[0090] In the region where the connecting portion 12 and the connecting portion 13 overlap, the upper surface of the connecting base portion 131 of the connecting portion 13 of the adjacent block abuts against the lower surface of the connecting base portion 121 of the connecting portion 12 of the reference block. Also, the rear surface of the connecting wall portion 132 of the connecting portion 13 of the adjacent block abuts against the front surface of the connecting wall portion 122 of the connecting portion 12 of the reference block.

[0091] In this way, by providing the connecting portions 12 and 13, the contact surface can be widened between adjacent blocks 10, and water intrusion can be suppressed more favorably.

[0092] After the block 10 is installed, nuts N (FIG. 8(c)) are tightened on the rods 312 of each of the main anchors 31. Thereby, the block 10 is pressed against the upper surface of the dike EM and fixed to the dike EM. Also, the sub-anchor 32 is driven through the through hole TH2 of the block 10 to fix the block 10 more firmly to the dike EM.

[0093] (4) As shown in FIGS. 8(d) and 9(c), on the river side of the block 10, a plurality of brackets 20 are arranged along the extending direction of the levee EM. Each of the brackets 20 is installed such that the width direction of the bracket 20 coincides with or substantially coincides with the extending direction of the levee EM, and the front surface 20c faces the river side.

[0094] The bracket 20 is selected and installed from two types of brackets 20 having different inclination angles θ, and the inclination angle of the bracket 20 coincides with or approximates the inclination angle of the slope SL of the levee EM at the installation location. Therefore, for the installed bracket 20, the lower surface 21b of the base plate portion 21 abuts against the inclined surface SL of the levee EM, and the rear surface 22d of the wall plate portion 22 abuts against the front plate 112c of the wall portion 112 of the block 10 and the connecting wall portion 132.

[0095] Also, the sealing portion 23 is fitted between the base portion 111 of the block 10 and the bottom surface Rb of the concave portion R. The upper surface 23a of the sealing portion 23 abuts against the curved surface CV 11 and the curved surface CV 13 abuts against.

[0096] A certain bracket 20 (hereinafter, appropriately referred to as the "reference bracket") is arranged such that the first connecting concave portion CR1 of the reference bracket overlaps with the second connecting concave portion CR2 of the bracket 20 (hereinafter, appropriately referred to as the "adjacent bracket") arranged on the left side of the reference bracket. In this state, the through holes TH4 and TH5 provided in the first connecting concave portion CR1 of the reference bracket respectively overlap with the through holes TH4 and TH5 provided in the second connecting concave portion CR2 of the adjacent bracket. Also, the through hole TH5 overlaps with the through hole TH3 of the block 10.

[0097] As shown in FIG. 9(c), in this embodiment, the length in the width direction of the bracket 20 is approximately half of the length in the width direction of the block 10. In the extending direction of the levee, the positions where the through holes TH1, TH2, and TH3 of the block 10 are installed coincide with the positions where the through holes TH4 and TH5 of the bracket 20 are installed.

[0098] In the region where the reference bracket and the adjacent bracket overlap, the front surface 20c in the second connecting recess CR2 of the adjacent bracket abuts against the lower surface 21b of the base plate portion 21 and the rear surface 22d of the wall plate portion 22 in the first connecting recess CR1 of the reference bracket. Thus, by providing the first and second connecting recesses CR1 and CR2, the contact surface can be widened between the adjacent brackets 20, and water intrusion can be suppressed more effectively.

[0099] After the bracket 20 is installed, a bracket anchor 40 is driven through the through-hole TH4 of the bracket 20 to fix the bracket 20 to the embankment EM. Also, a bolt (not shown) is passed through the through-hole TH5 of the bracket 20 and the through-hole TH3 of the block 10 to fix the bracket 20 to the block 10.

[0100] (5) Thereafter, mortar is injected into the space 11E of the main body portion 11 of the block through the injection hole IN of the block 10 and solidified. When the mortar is injected, the air in the space 11E is discharged from the exhaust port EX. The injection port IN is blocked by the solidified mortar.

[0101] The mortar functions as a weight inside the block 10 and also serves to support the top plate 111a from below to prevent the dent in the top plate 111a. The amount of mortar to be injected can be arbitrarily set according to the required weight of the weight. As an example, the space H inside the base portion 111 111 can be filled to such an extent. Note that a foaming agent such as foamed urethane may be injected instead of the mortar.

[0102] Finally, a road surface forming plate 50 is installed on the base 111 of the block 10 (Fig. 1). The road surface forming plate 50 is arranged such that the upper surface 50a is flush or substantially flush with the upper surface of the embankment EM. The road surface forming plate 50 may be fixed to the base 111 of the main body portion 11 of the block 10 using bolts or the like. The road surface forming plate 50 can prevent the block 10 from being damaged by pedestrians, vehicles, etc. on the embankment EM and can also suppress the slipping of pedestrians and vehicles.

[0103] As described above, a levee raising structure 1000 is formed in which the levee raising units 100 are arranged in series along the levee EM.

[0104] The advantageous effects of the levee raising unit 100 of the present embodiment are summarized below.

[0105] The levee raising unit 100 of the present embodiment is mainly composed of a block 10 and a bracket 20, each of which is a hollow body formed of resin. Therefore, it can be manufactured and installed at low cost and is lightweight.

[0106] In the levee raising unit 100 of the present embodiment, the block 10 and the bracket 20 are separate bodies, and the block 10 is L-shaped when viewed in the width direction. In this way, by making the block 10, which has the largest volume among the levee raising units 100, an L-shape that is easy to stack, transportation to the installation location of the levee raising unit 100 can be performed efficiently, and transportation costs can be reduced.

[0107] Also, by making the block 10, which has the largest volume among the levee raising units 100, an L-shape that is not a complex shape, processing for obtaining a resin-made hollow body becomes easy, and manufacturing costs can be suppressed.

[0108] In the levee raising unit 100 of the present embodiment, the bracket 20, which has a smaller volume than the block 10, has two variations in which the inclination angles θ of the wall plate portion 22 with respect to the base plate portion 21 are different from each other. In this way, by providing variations to the bracket 20 with a small volume, it is possible to enhance the versatility of the levee raising unit 100 while suppressing an increase in manufacturing costs. If variations were to be provided for the block 10 with a large volume, costs such as the manufacture of molds would increase, and it would be difficult to suppress manufacturing costs.

[0109] In the elevation unit 100 of the present embodiment, a bracket 20 is installed on the river side of the block 10, and the wall plate portion 22 of the bracket 20 is in contact with the block 10. Therefore, when the water level of the river rises, the intrusion of water between the block 10 and the dike EM is preferably suppressed. Also, even when the wall portion 112 of the block 10 is pushed toward the river side, the fall of the wall portion 112 toward the river side is suppressed by the wall plate portion 22 of the bracket 20.

[0110] In the elevation unit 100 of the present embodiment, the bracket 20 has a sealing portion 23, and in the installed state, the sealing portion 23 is fitted and disposed between the block 10 and the dike EM. Therefore, when the water level of the river rises, the intrusion of water between the block 10 and the dike EM is preferably suppressed.

[0111] The River Act requires that the elevation unit actually installed in the river be (1) a structure that is safe against the normal action of flowing water, (2) a structure in which scour failure, slip failure, or seepage failure does not occur due to the expected load, and (3) the main part is made of concrete, steel sheet piling, or something equivalent thereto, or has a breast wall with a concrete structure or something equivalent thereto. However, the elevation unit 100 of the present embodiment can be manufactured and installed at low cost while satisfying these requirements.

[0112] The same effects as described above are also achieved in the installation method of the elevation unit 100 of the present embodiment and the elevation structure 1000.

[0113] <Modification Example> In the above embodiment, the following modification modes can also be used.

[0114] In the block 10 of the above-described embodiment, although the front plate 112c of the wall portion 112 and the bottom plate 111b of the base portion 111 are orthogonal to each other, this is not limiting. The angle (the angle seen in the width direction) between the front plate 112c of the wall portion 112 and the bottom plate 111b of the base portion 111 can be in the range of 80° to 100°. In the present invention, "the wall portion stands upright from the base portion" and "the cross-sectional L-shape" mean that the angle between the front plate 112c and the bottom plate 111c is within the range of 80° to 100°.

[0115] In the block 10 of the above-described embodiment, the cross-sectional shape by the plane orthogonal to the width direction of the main body portion 11 can be an arbitrary shape that is L-shaped (substantially L-shaped). For example, the top plate 111a of the base portion 111 may be parallel to the bottom plate 111b, and the rear plate 112d of the wall portion 112 may be parallel to the front plate 112c. Also, the curved portion CV 11 may not be provided. In this case, a right-angled bent portion is defined by the front end portion of the bottom plate 111b and the lower end portion of the front plate 112c. The sealing portion 23 of the bracket 20 is, for example, inserted between the bottom plate 111 and the dike EM by pushing down the upper surface of the dike EM.

[0116] The base portion 111 and the wall portion 112 of the main body portion 11 may have the same shape and dimensions, and the connecting base portions 121 and 131 and the connecting wall portions 122 and 132 of the connecting portions 12 and 13 may have the same shape and dimensions (through holes are provided at positions corresponding to the through holes TH2 of the connecting base portions 121 and 131 in the vicinity of the upper ends of the connecting wall portions 122 and 132). In this case, the block 10 is symmetric with respect to the direction inclined 45° backward from the vertical direction and the plane extending along the width direction. Thereby, at the site, the base portion and the wall portion can be used (installed) without distinction, and the same block 10 can be arranged similarly on both banks of the river.

[0117] In the block 10 of the above-described embodiment, the rib RB and the connecting portions 12 and 13 may be omitted. When forming the raised structure 1000 using the block 10 that does not have the connecting portions 12 and 13, a sealing agent may be disposed between adjacent blocks 10.

[0118] In block 10 of the above-described embodiment, the connecting bases 121 and 131 and the connecting wall portions 122 and 132 of the connecting portions 12 and 13 may not be flat plates but may be curved plates, corrugated plates, or the like. For example, by making the connecting base 121 and the connecting base 131 corrugated plates that can abut against each other, the area of the abutting surface between the connecting base 121 and the connecting base 131 can be made larger, and water intrusion can be suppressed more favorably. The same applies to the connecting wall portions 122 and 132. Further, through holes may be provided near the upper ends of the connecting wall portions 122 and 132, and bolt tightening may be performed through the through holes during connection. Thereby, the connecting wall portions 122 and 132 can be brought into closer contact more favorably, and water intrusion can be prevented more favorably.

[0119] In block 10 of the above-described embodiment, the connecting bases 121 and 131 and the connecting wall portions 122 and 132 of the connecting portions 12 and 13 are formed by a single plate-like member, but this is not limiting. The connecting bases 121 and 131 and the connecting wall portions 122 and 132 may be a hollow plate formed by a pair of opposing plate portions, or may have a structure in which the pair of plate portions are fused. Further, in the vicinity of the through holes TH1 to TH3, the pair of opposing plate portions of the hollow plate may be in contact with and fused to each other.

[0120] In block 10 of the above-described embodiment, the connecting portions 12 and 13 may have only the connecting wall portions 122 and 132. Even in an aspect in which only the connecting wall portions 122 and 132 disposed on the river side with respect to the connecting bases 121 and 132 are provided, water intrusion can be suppressed favorably.

[0121] In block 10 of the above-described embodiment, the positions of the injection port IN and the discharge port EX are arbitrary. The injection port IN may be provided in the wall portion 112, and the discharge port EX may be provided in the base portion 111. Further, the injection port IN and / or the discharge port EX may be omitted.

[0122] The bracket 20 of the above-described embodiment is a hollow body, but it may be a solid body.

[0123] In the above-described embodiment, the bracket 20 includes two types of brackets in which the inclination angles θ of the wall plate portion 22 with respect to the base plate portion 21 are different from each other, but the present invention is not limited thereto. The variation in the inclination angle θ of the bracket 20 may be only one type, or may be any number of three or more types.

[0124] In the above-described embodiment, the height of the wall plate portion 22 of the bracket 20 is 1 / 3 or less of the height of the wall portion 112 of the block 10, but the present invention is not limited thereto. The height of the wall plate portion 22 of the bracket 20 is arbitrary and may be 1 / 2 or less of the height of the wall portion 112 of the block 10.

[0125] In the bracket 20 of the above-described embodiment, the shapes of the first and second connecting recesses CR1 and CR2 can be appropriately changed. For example, the first connecting recess CR1 may be configured such that the rear surface 22d of the wall plate portion 22 is recessed and the base plate portion 21 and the sealing portion 23 do not exist. In this case, in the second connecting recess CR2, only the front surface 22c of the wall plate portion 22 is recessed. Further, in the bracket 20 of the above-described embodiment, the first and second connecting recesses CR1 and CR2 may be omitted. When forming the raising structure 1000 using the bracket 20 having no first and second connecting recesses CR1 and CR2, a sealing agent may be disposed between adjacent brackets 20.

[0126] In the method for installing the raising unit 100 of the above-described embodiment, water may be injected instead of mortar as a weight. In addition, any fluid, powder, or solid may be used as a weight. Further, a weight such as mortar may be injected into the bracket 20. The injection port may be formed by a drill or the like at the time of installation, or may be provided in advance. Further, in the method for installing the raising unit 100 of the above-described embodiment, it is not necessary to inject a weight.

[0127] In the method for installing the raising unit 100 of the above-described embodiment, the driving of the sub-anchor 32 may be omitted. Further, the bracket 20 may be fixed only by the bracket anchor 40, or may be fixed only by a bolt (or other fastening tool) (not shown) for fixing to the block 10.

[0128] In the installation method of the raising unit 100 of the above embodiment, a waterproof sheet material such as a resin sheet or water-swellable rubber may be sandwiched between the contact portions of the block 10 and the bracket 20. Thereby, the intrusion of water is more effectively suppressed.

[0129] In the installation method of the raising unit 100 of the above embodiment, any anchor can be used for the main anchor 31, the sub-anchor 32, and the bracket anchor 40. For example, all the anchors may be pivot anchors, or all the anchors may be L-shaped anchors.

[0130] In the installation method of the raising unit 100 of the above embodiment, the installation of the road surface forming plate 50 may be omitted. In this case, the top plate 111a of the base 111 of the block 10 may be provided with an anti-slip process.

[0131] In the installation method of the raising unit 100 of the above embodiment, when the levee EM is curved along the extending direction, the connection of the adjacent blocks 10 may be performed with the curved block 70 interposed therebetween, or the connection of the adjacent brackets 20 may be performed with the curved bracket 80 interposed therebetween.

[0132] The curved block 70 is a hollow block body integrally formed of resin, and as shown in FIG. 10, it has a main body portion 71, and connecting portions 72 and 73 provided at both ends of the main body portion 71.

[0133] The main body portion 71 is a hollow body similar to the main body portion 11 of the block 10. The main body portion 71 has a structure in which the dimension in the width direction of the main body portion 11 is reduced and is curved (in this specification, "curved" includes "bent") along the width direction. The bending angle θ 71 (FIG. 10) can be arbitrarily set. In FIG. 10, it is curved so as to be convex on the wall side (river side), but it may be curved so as to be convex on the base side (land side). The dimension in the width direction of the curved block 70 can be, for example, about 300 mm to 500 mm.

[0134] The connecting parts 72 and 73 each have the same structure as the connecting parts 12 and 13 of the block 10. That is, the connecting part 72 has a connecting base part 721 and a connecting wall part 722, and the connecting part 73 has a connecting base part 731 and a connecting wall part 732. Through holes TH1 and TH2 are provided in the connecting base parts 721 and 731, and a through hole TH3 is provided in the connecting wall parts 722 and 732. When connecting the block 10 to the curved block 70, the through holes TH1 to TH3 may be elongated holes such as arc-shaped or linear to enable fine adjustment of the angle of the block 10 with respect to the curved block 70 (the angle in plan view). This makes it easier to arrange the block 10 in accordance with the curvature of the dike EM.

[0135] The curved bracket 80 is a hollow body integrally formed of resin, and mainly has a base plate part 81, a wall plate part 82, and a ridge-shaped sealing part 83. The curved bracket 80 has a structure in which the dimension in the width direction of the bracket 20 is reduced and it is curved along the width direction. The angle θ 80 (FIG. 11) can be arbitrarily set. In FIG. 11, it is curved so as to protrude on the side of the base plate part 81 (river side), but it may also be curved so as to protrude on the side of the sealing part 83 (land side). As an example, the dimension in the width direction of the curved bracket 80 can be about 300 mm to 500 mm.

[0136] At both ends of the curved bracket 80, first connecting recesses CR1 and second connecting recesses CR2 are provided in the same manner as the bracket 20. Through holes TH4 and TH5 are provided inside the first connecting recess CR1 and the second connecting recess CR2 respectively. When connecting the bracket 20 to the curved bracket 80, the through holes TH4 and TH5 may be elongated holes such as arc-shaped or linear to enable fine adjustment of the angle of the bracket 20 with respect to the curved bracket 80 (the angle in plan view). This makes it easier to arrange the bracket 20 in accordance with the curvature of the dike EM.

[0137] On the curved block 70 and the curved bracket 80, a road surface forming plate curved in the same manner as these can be arranged.

[0138] Note that the blocks 10 and brackets 20 in the above embodiment may be curved along the width direction in the same manner as the curved blocks 70 and curved brackets 80. The curved portion may be provided at an arbitrary position in the width direction, for example, at the center in the width direction of the main body portion 11 and the bracket 20.

[0139] A lifting kit may be configured by combining the block 10 and a plurality of types of brackets 20 having different inclination angles θ from each other.

[0140] In the above embodiment, the case where the lifting unit 100 is installed on the river embankment EM for the purpose of raising the river embankment has been described as an example. However, the lifting unit 100 can be used for raising the embankments for any water areas such as the sea and lakes.

[0141] As long as the features of the present invention are maintained, the present invention is not limited to the above embodiment, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

Explanation of Reference Numerals

[0142] 10 Block 11 Main body portion 111 Base portion 112 Wall portion 12, 13 Connecting portion 20 Bracket 21 Base plate portion 22 Wall plate portion 23 Sealing portion 31 Main anchor 32 Sub-anchor 40 Bracket anchor 50 Road surface forming plate 70 Curved block 80 Curved bracket

Claims

1. An embankment raising unit for raising an embankment having an upper surface and an inclined surface inclined from the upper surface toward the water area side, comprising: a hollow block made of resin having an L-shaped cross section, including a hollow plate-shaped base and a hollow plate-shaped wall portion standing upright from the base; a wall plate, a base plate inclined with respect to the wall plate and extending downward from the lower end portion of the wall plate to the lower side of one surface side of the wall plate, and a bracket having a ridge-shaped sealing portion protruding to the other surface side of the wall plate along the connection portion between the wall plate and the base plate; an anchor for fixing the base of the hollow block to the upper surface of the embankment; When the embankment raising unit is installed on the embankment, the wall portion of the hollow block is directed toward the water area side of the embankment, the wall plate of the bracket is brought into contact with the wall portion of the hollow block, the base plate of the bracket is brought into contact with the inclined surface of the embankment, and the sealing portion of the bracket is located between the hollow block and the embankment.

2. The hollow block includes a first connection portion provided on one end side in the direction along the connection portion between the base and the wall portion, and a second connection portion provided on the other end side in the direction. The first connection portion has a first surface orthogonal to the thickness direction of the wall portion. The second connection portion is a second surface orthogonal to the thickness direction of the wall portion, and has a second surface configured to contact the first surface of the first connection portion of another hollow block installed adjacent to the hollow block. The embankment raising unit according to claim 1.

3. The hollow block has ribs formed by constriction of the hollow block. The embankment raising unit according to claim 1 or 2.

4. The height of the wall plate of the bracket is 1 / 3 or less of the height of the wall portion of the hollow block. The embankment raising unit according to any one of claims 1 to 3.

5. The hollow block is provided with an opening for injecting weights into the inside of the hollow block. The embankment raising unit according to any one of claims 1 to 4.

6. The hollow block is provided with a discharge port for discharging the gas inside the hollow block when the weights are put in. The embankment raising unit according to claim 5.

7. The bracket includes a first connection portion provided on one end side in the direction along the connection portion between the base plate and the wall plate, and a second connection portion provided on the other end side in the direction. The first connection portion has a first surface orthogonal to the thickness direction of the wall plate. The second connecting portion is a second surface orthogonal to the thickness direction of the wall panel, and has a second surface configured to abut against the first surface of the first connecting portion of another bracket installed adjacent to the bracket. The lifting unit according to any one of claims 1 to 6.

8. The anchor is a pivot anchor having an anchor portion driven into the ground and a rod portion pivotally connected to the anchor portion. The lifting unit according to any one of claims 1 to 7.

9. The lifting unit according to any one of claims 1 to 8, further comprising a road surface forming plate installed on the base portion of the hollow block.

10. A lifting structure including a plurality of lifting units installed in succession in the extending direction of the levee, The lifting structure, wherein each of the plurality of lifting units is the lifting unit according to any one of claims 1 to 9.

11. The lifting structure according to claim 10, wherein at least one of the hollow blocks of the plurality of lifting units is curved along the extending direction of the levee.

12. A method of installing the lifting unit according to any one of claims 1 to 9 on the levee, Fixing the hollow block to the levee using the anchor, A method including injecting weights into the hollow block.

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