JP4504864B2 - Dam body reinforcement structure with wave-dissipating function - Google Patents

Description

  The present invention relates to a dam body reinforcing structure with a wave-dissipating function that can be reinforced by adding a wave-dissipating function to an existing dam body.

  Existing relatively old levee bodies (for example, concrete structures such as gravitational walls) that form dykes, revetments, quay walls, etc. installed on the coast are not necessarily against storm surges, waves (high waves), etc. Some of the required functions cannot be secured and require reinforcement. Conventionally, when reinforcing such an existing bank body, first, the wave-dissipating block installed on the sea (water area) side of the bank body is once removed. In this case, a place for temporarily placing the wave-dissipating block is secured, and the wave-dissipating block is temporarily placed so that it can be reused. Next, a temporary cut sheet pile wall is constructed along the existing levee body on the front side (sea side) and rear side (land side) of the existing levee body, and erected on the mutually opposing surfaces of the sheet pile wall. Attach, and install a beam between the opposite flank.

  That is, a temporary deadline surrounding the existing embankment body is constructed, and the seawater inside is drained to dry the embankment body and its surroundings. In addition, the lower part of the buried dam body is excavated to the flooring surface. In order to increase the thickness of the existing levee body and increase the height, a reinforcing bar is arranged, for example, in front of or above the existing dam body, and a formwork is formed so as to surround the front side and the upper part of the levee body. Install. And concrete is laid in a formwork. Then, after curing the concrete, the formwork is removed and the excavated portion is backfilled. Next, the temporary deadline is removed and the wave-dissipating block that was temporarily placed is re-installed. In addition, when installing the wave-dissipating block, a new wave-dissipating block is added as necessary, and the wave-dissipating block is sufficiently stacked up to a height where the wave-dissipating function can be obtained. As described above, even if the existing embankment body is reinforced so as to be thicker and higher, many processes (work types) are required and a long construction period is required.

Here, when raising the wave-dissipating structure that becomes the quay, while maintaining the wave-dissipating function corresponding to the raised height, the top plate is removed from the main body of the structure so that it can be easily raised, There has been proposed a construction method in which a raised portion is added to the edge cut surface of the top plate, and then the raised top plate is re-installed on the structure body (for example, see Patent Document 1).
According to this construction method, the wave-dissipating quay can be raised in a few steps.
JP 2001-207424 A

However, in the above construction method, the structure of the wave-dissipating structure that can be raised is extremely limited, and cannot be applied to general dikes, revetments, quay walls, and the like. Moreover, although the wave-absorbing structure can be raised, there is a problem that it is not necessarily reinforced.
Therefore, in general dikes, revetments, and quay walls, it is necessary to lay down and drain the concrete as described above, and to place concrete to increase the thickness of the levee body, increasing the construction cost and increasing the construction period. There is still a problem of conversion. In addition, when constructing a levee body that has a wave-dissipating function instead of an existing levee body and that is stronger and taller than an existing levee body, it is necessary to close and drain as described above. At the same time, it is necessary to remove at least a part of the existing levee body, and waste material is generated.
In addition, when the wave-dissipating block is once removed and re-installed, it is difficult to remove the wave-dissipating block without damaging the wave-dissipating block because the wave-dissipating blocks are in mesh with each other. . Moreover, since the re-installed wave-dissipating block is moved and damaged or lost due to a typhoon or the like, it is costly to maintain and manage the wave-dissipating function of the wave-dissipating block.

  The object of the present invention is to provide a wave-dissipating function that does not require a process such as temporary construction, and can provide a wave-dissipating function and reinforce the existing embankment as a dike, revetment, etc. in a short period of time with few processes. It is to provide a dam body reinforcement structure.

In order to solve the above-described problems, the invention described in claim 1 is an example of a power supply for reinforcing the existing dam body 1 provided on the shore and adding a wave-dissipating function as shown in FIGS. A dam body reinforcement structure with a wave function, wherein the steel pipe piles 2 are formed on the water area side of the dam body 1 so as to be substantially parallel to the side surface of the levee body along the levee body 1 in the front-rear direction. Are installed side by side, and a predetermined interval is provided between the steel pipe piles 2, ... and the dam body 1, and adjacent steel pipe piles 2, ... are installed at a predetermined interval longer than the diameter , While covering the upper part of the space between the said dam body 1 and the steel pipe piles 2 ... installed along with the water area side of the said dam body 1, and the row | line | column of the said dam body 1 and the said steel pipe piles 2, ... A top plate portion 7 made of reinforced concrete that is bridged between and connected to the dam body 1 and the steel pipe piles 2. Provided, the steel pipe pile 2, the upper ends of and higher than the dam body 1 the upper end, characterized by Rukoto provided with the top plate portion 7 on the embankment 1.

According to the invention described in claim 1, the steel pipe piles 2,... Are spaced apart from each other in parallel to the levee body 1 in a state where the dam body 1 is spaced from the front side (water body side) of the existing dam body 1. It becomes the state where it opened and arranged .
In this way, by arranging the plurality of steel pipe piles 2, ... on the front side of the dam body 1 with a space between each other, the steel pipe piles 2, ... are subjected to waves before the dam body 1, and the steel pipe pile 2 After the wave power is reduced by..., The wave hits the dam body 1. That is, the dam body 1 is reinforced by the steel pipe piles 2,.

  Further, in such a configuration, the wave force is reduced by the steel pipe piles 2,... Arranged at intervals as described above, and the existing dam body 1 and the dam body 1 are arranged at intervals from each other. The wave force is reduced by the space (water play chamber 10) formed between the steel pipe piles 2 arranged in a shape, and the wave force is further reduced by the existing dam body 1. If the wave-dissipating blocks 6 are left as will be described later, the wave force is further reduced by the existing wave-dissipating blocks 6. That is, according to the dam body reinforcing structure with a wave-dissipating function of the present invention, the wave force is quadrupled, and a necessary and sufficient wave-dissipating function can be obtained.

  Moreover, the construction of the steel pipe piles 2,... Can be performed by using a pile press-fitting and drawing machine capable of press-fitting the steel pipe piles 2,. Here, the pile press-fitting / pulling machine can move while press-fitting the steel pipe piles 2, ... sequentially on the press-fitted steel pipe piles 2, ..., so that work on the water surface is possible. There is no need to drain the water and no temporary work is required. That is, since the press-fitting of the steel pipe piles 2,... Can be started almost as it is before the construction, the temporary construction process can be eliminated and the construction can be performed in a short time with few processes. In addition, for example, if the steel pipe piles 2,... Can be installed without draining, for example, by placing a steel pipe pile from the land side, the pile press-fitting and drawing machine is not necessarily used.

Further, when a pile press-fitting and drawing machine capable of press-fitting while rotating the steel pipe piles 2 around the axis, the concrete wave-dissipating blocks 6,... Can be press-fitted into the ground. Basically, it is not necessary to remove the wave-dissipating block in the range in which the steel pipe piles 2 are press-fitted, and the construction period can be shortened.
Moreover, from the above thing, the present condition is maintained, without impairing the protective function by the existing bank body 1 and the wave-dissipating block 6, ... during construction. Moreover, since the existing dam body 1 and the wave-dissipating blocks 6 are almost as they are, there are almost no environmental changes during construction. That is, the influence on the environment by construction can be minimized, and the current natural environment can be preserved. Further, since the existing structure is maintained as it is, no waste material is generated.

Moreover , the existing dam body 1 can be reinforced more firmly by setting it as the state which connected the steel pipe pile 2, ... and the existing dam body 1 with the top-plate part 7. FIG. Moreover, it can prevent that the water splashed from the reclaimed water chamber 10 formed between the row | line | column of the steel pipe piles 2 ... and the existing bank body 1 gets over the bank body 1 and wets the land side. Moreover, the top plate portion 7 is arranged from the steel pipe piles 2 to the existing dam body 1 so that the width of the top plate portion 7 is wider than the upper surface of the existing dam body 1. In addition, a hydrophilic facility 12 such as a promenade can be arranged for effective use.
Moreover, the upper surface of the top-plate part 7 becomes higher than the existing bank body 1, and it will be in the state reinforced so that the existing bank body 1 may be raised. That is, the existing dam body 1 is raised by the top plate portion 7 and is reinforced so as to cope with higher high waves.

The invention according to claim 2 is characterized in that, in the dam body reinforcing structure with a wave-dissipating function according to claim 1 , a hydrophilic facility 12 is provided on the top plate portion 7.
According to the invention described in claim 2 , since the hydrophilic facility 12 is provided on the top plate portion 7, people can effectively use the environment along the coast by the newly constructed dam body reinforcing structure with a wave-dissipating function. can do. The hydrophilic facility 12 is a promenade, a cycling road, a green zone, a fishing park, a hydrophilic park, or the like, or a combination of these. That is, the hydrophilic facility 12 may be any facility that can enjoy a waterside environment, and it is preferable that the proper use of the public coast can be ensured.

The invention according to claim 3 is the dam body reinforcement structure with a wave-dissipating function according to claim 1 or 2 , wherein the steel pipe piles 2,... Is placed in the ground on the water side in a state of penetrating the wave-dissipating blocks 6.

According to the invention described in claim 3 , since it is not necessary to remove and re-install the wave-dissipating blocks 6, ..., it is possible to reduce the cost and shorten the construction period. Further, the wave power is reduced by the wave-dissipating blocks 6,... During the construction, and a protective function during the construction can be ensured. In addition, the wave power can be reduced by the existing wave-dissipating blocks 6,.
Moreover, a part of wave-dissipating block 6, ... is fixed by the steel pipe pile 2, ... penetrating, and damage and loss | disappearance of the wave-dissipating block 6, ... by a typhoon etc. can be prevented.
In addition, it is not necessary that all the steel pipe piles 2 ... penetrate into the wave-dissipating block 6, ..., and it is only necessary that some steel pipe piles 2, ... penetrate into the wave-dissipating block. . Moreover, when the wave-dissipating blocks 6,... Are arranged in a state in which it is difficult to press-fit the steel pipe piles 2,. .

The invention according to claim 4 is the dam body reinforcing structure with wave-dissipating function according to any one of claims 1 to 3 , wherein the steel pipe piles 2,. Are inclined with respect to the lower part of the levee body 1 from the upper end of the steel pipe piles 2.

According to the invention described in claim 4 , the steel pipe piles 2 can be reinforced by the inclined steel pipe pile 11, and the existing dam body 1 can be reinforced.

  According to the present invention, it is possible to provide a wave-dissipating function to an existing bank body in a short period of time and to reinforce the existing bank body without requiring a temporary process. In addition, there is no waste material, there is almost no impact on the environment during construction, and the current environment can be maintained.

Hereinafter, with reference to FIG. 1 (A) and (B), the bank body reinforcement structure with a wave-dissipating function of embodiment of this invention is demonstrated.
As shown in FIG. 1, the dam body reinforcing structure with a wave-dissipating function is for adding a wave-dissipating function to the existing dam body 1 and for reinforcing the existing dam body 1. A plurality of steel pipe piles 2 are arranged side by side along the dam body 1 along the dam body 1 so as to be substantially parallel to the side surface of the water body side of the dam body 1 in the front-rear direction, and the steel pipe pile 2 ,... And the levee body 1 with a predetermined interval, and adjacent steel pipe piles 2,... Are installed with a predetermined interval longer than the diameter.
Here, the existing dam body 1 is, for example, a concrete structure typified by a gravitational wall body, and a lower portion is buried in the ground.
In addition, FIG. 1 shows the cross section of a coast, the left side of the existing dam body 1 in the figure is the sea, and the right side is the land. And the part adjacent to the bank body used as the back side of the bank body 1 is a state which can be utilized as the road 4 grade | etc., And also has the house 3 grade | etc., In the back side. A drainage groove 5 is formed at the boundary between the road 4 and the house 3. On the other hand, the sea side of the levee body 1 is an inclined surface, and the inclined surface is below the water surface although it depends on the tide level. A large number of existing wave-dissipating blocks 6 are arranged on the sea side of the levee body 1.

  The steel pipe piles 2,... Are well-known, and are, for example, press-fitted while being rotated around an axis by a pile press-fitting and drawing machine 20 as will be described later. It is in a state of extending substantially vertically above the ground. The steel pipe piles 2,... Are press-fitted into the ground to a depth that provides sufficient strength against wave forces and the like. Moreover, the steel pipe piles 2, ... are press-fitted into the ground in a state of penetrating the wave-dissipating blocks 6, ... arranged on the ground.

That is, by pressing the steel pipe piles 2... While rotating, the lower end portions of the steel pipe piles 2... Are penetrated into the concrete wave-dissipating blocks 6. In addition, it is good also as what attaches a blade edge so that a hole can be easily made in concrete structures, such as a wave-dissipating block 6, ..., in the lower end part of the steel pipe pile 2, ....
Moreover, the steel pipe pile 2, ... is the installed state, and the upper end is made higher than the upper end of the existing dam body 1. Moreover, the space | interval (for example, the shortest distance of the side surface of the dam body 1 upper part and the outer peripheral surface of the steel pipe pile 2) between the steel pipe piles 2 ... and the existing dam body 1 is about 1-3 m, for example. For example, it is set as the space | interval from the diameter grade of the steel pipe pile 2, ... to several times the diameter of the steel pipe pile 2, ....

  Further, the steel pipe piles 2 are arranged in a line along the extending direction of the existing dam body 1 and are arranged at substantially equal intervals. Moreover, the space | interval (for example, distance between the centers of the steel pipe piles 2 ...) between adjacent steel pipe piles 2 ... is about 1.5 times the diameter of the steel pipe pile 2 about 2 times. That is, the gap between the steel pipe piles 2,... Is about a distance from the radius of the steel pipe piles 2,.

Moreover, between the upper end part of the steel pipe piles 2 ... arrange | positioned in a row and the upper end part of the levee body 1, the top-plate part 7 which is a concrete structure newly established with respect to the existing dam body 1 is provided. It is provided in a state of being bridged. The top plate portion 7 has a raised portion 71 for raising the levee body 1 to the height of the steel pipe piles 2,... Higher than the dam body 1 in a state of having substantially the same longitudinal width as the dam body 1 on the dam body 1. It is in the state in which the extension plate part 72 extended in the slab shape substantially horizontally toward the outer peripheral surface of the side surface of the steel pipe pile 2, ... from the upper part of the part 71 is integrally formed.
That is, while covering the upper part of the space (reservoir chamber 10) between the existing levee body 1 and the steel pipe pile 2, installed along the water area side of the dam body 1, the levee body 1 and the steel pipe pile 2, The top plate part 7 made of reinforced concrete is provided between the rows of the reinforced concrete and connected to the dam body 1 and the steel pipe piles 2.
Further, the upper ends of the steel pipe piles 2 are made higher than the upper end of the dam body 1, and the top plate portion 7 is provided on the dam body 1.

  Further, a plurality of studs 8 are welded to the outer peripheral upper ends of the steel pipe piles 2..., And the steel pipe piles 2 and the concrete top plate 7 are joined using the studs 8. It is like that. Further, a plurality of holes for inserting anchors are formed on the upper surface of the levee body 1, and chemical anchors 9,... Are attached in a state where the lower portions are inserted and fixed in the holes, and the existing dams are attached by these chemical anchors 9,. The body 1 and the newly installed top plate part 7 are joined.

FIG. 2 shows a modified example of the dam body reinforcing structure with a wave-dissipating function of the present invention. In addition to the above-described configuration shown in FIG. 1, the steel pipe piles 2,. An inclined inclined steel pipe pile 11 is installed. If the inclined steel pipe pile 11 is rotated in the same manner as the steel pipe piles 2,. Moreover, the position of the upper end of the inclined steel pipe pile 11 is made substantially equal to the position of the upper end of the steel pipe piles 2..., And the lower part of the inclined steel pipe pile 11 is press-fitted into a state of being penetrated into the dam body 1. .
That is, the steel pipe piles 2,... Are installed substantially vertically, and the inclined steel pipe piles 11,... That are inclined with respect to the steel pipe piles 2,. Will be installed in. Thereby, the steel pipe piles 2, ... and the dam body 1 are reinforced.

The inclined steel pipe piles 11 may be installed at the same interval as the vertical steel pipe piles 2,..., And the same number as the steel pipe piles 2,. One steel pipe pile 11 may be installed. Further, the inclined steel pipe pile 11 and the steel pipe pile 2 may have substantially the same diameter or different diameters. Even if the inclined steel pipe pile 11 is thinner than the steel pipe pile 2. good.
Moreover, the stud 8 is welded also to the upper end part of the inclined steel pipe pile 11, and the inclined steel pipe pile 11 and the concrete top plate part 7 are joined. Thereby, the whole dam body reinforcement structure with a wave-dissipating function is reinforced by the inclined steel pipe pile 11. FIG.

  Further, in the example shown in FIG. 2, a green zone where people can enter and exit as a hydrophilic facility 12 and an edge road that can be used as a cycling road and a promenade are provided on the top plate 7. In addition, for example, asphalt or the like is placed on the top plate portion 7 or tiles or paving stones are arranged to form an edge road, for example, planting on the left and right shoulder portions of the edge road A green zone is formed. Handrails 13 are provided before and after the hydrophilic facility 12. Further, on the land side of the levee body 1, a staircase, a slope, or the like from the road 4 to the hydrophilic facility 12 on the top plate portion 7 is provided so that people can enter and leave the hydrophilic facility 12. Depending on the situation on the sea side, a staircase or a slope may be provided so as to be able to descend from the hydrophilic facility 12 to the coast, thereby enhancing hydrophilicity.

The construction method of the dam body reinforcement structure with a wave-dissipating function as described above will be described. First, the steel pipe piles 2,... Are installed in a row at predetermined intervals on the shore side of the dam body 1. In this case, a well-known pile press-fitting machine 20 shown in FIG. 3 is used. The pile press-fitting / pulling machine 20 includes a saddle 22 having a plurality of clamps 21,... That are inserted into the upper ends of the steel pipe piles 2. , A slide base (not shown) that can move back and forth with respect to the saddle 22, a mast 24 that can be swung to the left and right around a rotation axis that is substantially vertical on the slide base, and a pile press-fit puller 20 on the front of the mast 24. A rotation reader 25 that can rotate around a rotation axis along the front-rear direction, a chuck device 27 that slides (moves up and down) along the rotation reader 25, and a chuck device 27 that is provided on the chuck device 27 and that is It has a pile chuck 28 that is rotatable around a rotation axis along the direction and grips the steel pipe pile 2 from the outer peripheral side.
This pile press-fitting and pulling machine 20 takes the reaction force from the steel pipe piles 2 that have been previously inserted (the first few steel pipe piles 2 were installed to take a dedicated counterweight and reaction force) In some cases, the reaction force is taken from the structure, etc.), while the steel pipe pile 2 is rotated around its axis and press-fitted into the ground, the steel pipe piles 2, ... are moved in order, and the steel pipe pile 2, ... can be press-fitted.

Further, in the pile press-fitting and drawing machine 20, the steel pipe pile 2 is press-fitted approximately vertically along the rotation leader 25 along the vertical direction, but the steel pipe is inclined obliquely by tilting the rotation leader 25. It is also possible to press-fit the pile 2 (inclined steel pipe pile 11). Also in this case, press-fitting is possible while rotating the inclined steel pipe pile 11.
Further, by providing a blade edge or the like at the tip of the steel pipe pile 2 (inclined steel pipe pile 11), it is possible to penetrate the steel pipe pile 2 while rotating it on a structure such as concrete.

In the case where the steel pipe pile 2 is lined up on the sea side of the dam body 1 using the above-described pile press-fitting and drawing machine 20, the pipe press-fitting and drawing machine 20 is on the steel pipe pile 2 that has come out on the water surface. Since the pile 2 can be press-fitted, there is no need to construct a cut-off wall on site and drain the water. Moreover, the steel pipe pile 2 can be supplied to a pile press-fitting / pulling machine by supplying it from a land side with a crane or using a well-known crane capable of self-propelling on the steel pipe pile 2.
Therefore, when the first few steel pipe piles 2, ... are pressed in, there is no need for a temporary structure except for installing a counterweight or constructing a structure in order to take a reaction force. The process and the construction period are not necessary, and the cost can be reduced and the construction period can be shortened.

  And the steel pipe pile 2 is press-fitted by the pile press-fitting and drawing machine 20 away from the dam body 1 to the sea side as described above at a predetermined interval. In this case, the steel pipe pile 2 can be penetrated into the wave-dissipating blocks 6,..., So that the wave-dissipating blocks 6,. It is possible to press-fit steel pipe piles 2. Note that depending on the arrangement of the wave-dissipating blocks 6,..., It may be difficult to press-fit the steel pipe piles 2. In that case, some of the wave-dissipating blocks 6,.

  And after pressing the steel pipe piles 2 ... in a line along the bank 1, the top plate part 7 is constructed. In addition, in order to further reinforce, the inclined steel pipe pile 11 may be press-fitted when the steel pipe pile 2 is pressed before the top plate portion 7 is constructed. In this case, the inclined steel pipe pile 11 is press-fitted while the above-mentioned rotation leader 25 is inclined while the reaction force is taken from the steel pipe pile 2 press-fitted substantially vertically.

When constructing the top plate portion 7, the studs 8,... Are welded to the upper end portion of the steel pipe pile 2 (and the inclined steel pipe pile 11), and an anchor is used on the joint portion of the top plate portion 7 of the existing dam body 1. Drill holes and install chemical anchors.
Then, the bars are placed and the formwork is erected to place concrete. Remove formwork after curing concrete.
In addition, a hydrophilic facility 12 including an edge road, a green space, a handrail 13 and the like is constructed on the top plate portion 7.

  That is, the top plate portion 7 is bridged between the dam body 1 and the row of steel pipe piles 2 at a position spaced from the dam body 1, so that a larger area than the upper surface of the existing dam body 1 is provided. It can be secured on the top, and a sufficiently large area can be secured as a promenade or cycling road, and facilities such as a green zone, a fishing park, and a water park can be constructed.

And according to the dam body reinforcement structure with a wave-dissipating function as described above, in addition to the reduction of the wave force by the existing wave-dissipating blocks 6, ... and the dam body 1, the steel pipes arranged at an appropriate interval from each other The wave force is reduced by the piles 2,... And the space between the steel pipe piles 2,. Moreover, by providing the top plate portion 7 on the existing levee body 1, the levee body 1 is raised, and it becomes possible to cope with higher high waves.
In addition, although the row | line | column of the steel pipe pile 2 was made into one row, you may arrange | position the steel pipe pile 2 in multiple rows along the bank body 1. FIG .

It is drawing which shows the bank body reinforcement structure with a wave-dissipating function of embodiment of this invention. It is drawing which shows the modification of the dam body reinforcement structure with a wave-dissipating function. It is drawing which shows the pile press-fit drawing machine which press-fits the steel pipe pile of a dam body reinforcement structure with a wave-dissipating function, and an inclined steel pipe pile.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing dam body 2 Steel pipe pile 6 Wave-dissipating block 7 Top plate part 10 Reservoir room (space between a dam body and a steel pipe pile)
11 Inclined steel pipe pile 12 Hydrophilic facility

Claims (4)

A dam body reinforcement structure with a wave-dissipating function for reinforcing an existing dam body provided on the shore and adding a wave-dissipating function,
On the water body side of the levee body, the steel pipe piles are arranged side by side so as to be substantially parallel with a gap in the front and back sides along the levee body,
And with a predetermined interval between the steel pipe pile and the levee body, the adjacent steel pipe pile is installed with a predetermined interval longer than its diameter ,
Covering the upper part of the space between the existing levee body and the steel pipe pile installed side by side on the water side of the dam body, and spanning between the dam body and the row of steel pipe piles; and The top plate portion made of reinforced concrete is connected to the bank body and the steel pipe pile,
Wherein the upper end of the steel pipe pile was higher than the dam body upper, wave absorbing function embankment reinforcement structure, characterized in Rukoto provided with the top plate portion on the dam. The dam body reinforcing structure with a wave-dissipating function according to claim 1 , wherein a hydrophilic facility is provided on the top plate portion. The said steel pipe pile is press-fitted into the ground on the water area side in a state of penetrating the wave-dissipating block in a state where an existing wave-dissipating block is arranged on the water area side of the levee body. Or the dam body reinforcement structure with a wave-dissipating function of 2 or 2 . 2. The steel pipe pile is installed substantially vertically, and an inclined steel pipe pile that is inclined with respect to the steel pipe pile is installed obliquely from an upper end portion of the steel pipe pile toward the lower part of the dam body. The dam body reinforcement structure with a wave-dissipating function of any one of ~ 3 .

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