JP2006169769A - Pier reusing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pier reusing method for reusing a structure that cannot exert functions of a pier due to its aging, deterioration, or the like, without crushing the same. <P>SOLUTION: In reusing the structure that cannot exert the functions of the pier 1, the pier reusing method comprised of the following steps is employed. In the first step, a steel pipe pile 2 is cut away from the pier 1 and superstructure work 10 formed of a floor slab portion 5, a beam portion 4, and a pile head portion 3 is removed. In the second step, the removed superstructure work 10 in its original condition or in a condition in which a new structure or a new object is added to the original superstructure work, is set on the ground, in the ocean, or in a river, to thereby form a new structure having new functions. Thus the pier 1 can be reused without crushing the same, and therefore dust or noise which is unavoidable when crushing is carried out, occurs, whereby a large load is not imposed on the environment. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for reusing a structure of a jetty that has become unnecessary due to social demands such as an increase in size, or a structure that has failed to function as a jetty due to aging or deterioration.

Structures that no longer function as piers due to aging or deterioration have been dismantled and removed, and then crushed into large chunks, granular crushed material, and finely crushed material for reuse.
However, the work of crushing concrete members such as floor slabs and beams constituting the pier increases the environmental burden such as generation of dust and noise and generation of carbon dioxide. In addition, the crushing work requires a crushing device and a worker engaged in the crushing work, and there is a problem that costs increase.

  As a conventional technique for solving such a problem, Patent Document 1 discloses that a concrete board is cut out from a concrete floor slab of a bridge, and the cut concrete board is formed on an artificial reef, a submerged dike, a breakwater dike, or a caisson filling material. In addition, the cut concrete boards are arranged in a cross shape and installed on the bottom of the sea or the river to install a water control system or a foundation, or on a vehicle passage to form a vehicle travel block. In addition, one or more of the cut concrete plates are arranged in a cross-girder shape and installed on the bottom of the sea or river to form an artificial reef or breeding reef, and also cut from the concrete floor slab of the bridge It is disclosed that a concrete board is placed on gravel laid on a horizontal ground or an inclined ground to form a gluing or laver lining

JP 2002-194723 A

  However, the invention of Patent Document 1 is an invention of a method of reusing a concrete floor slab of a bridge, and a method of reusing a structure that does not fulfill its function as a pier due to aging or deterioration is not considered. Still, there are still challenges.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a method of reusing a structure that does not satisfy its function as a jetty due to aging or deterioration without being crushed.

The 1st invention for solving the above-mentioned subject is a pile part which stands up at intervals, a pile head joined to the upper end of these pile parts, and a beam part which connects an adjacent pile head And in the reuse method of the pier composed of a floor slab that covers the beam part and the pile head from above, the pile part is separated from the pile head, and the floor slab part, the beam part, and the The first step of removing the superstructure consisting of the pile head and the removed superstructure in its original form or with a new structure or object installed on land, ocean or river And a second step of forming a new structure having a new function.
By constructing in this way, the structure that no longer fulfills its function as a pier is reused in a form in which the superstructure consisting of the floor slab part, beam part and pile head is maintained in its original form. There is no need to crush the floor slab, beam and pile head.

Moreover, 2nd invention for solving the said subject connects the pile part erected by the interval, the pile head joined to the upper end of these pile parts, and the adjacent pile head In a reuse method of a pier composed of a beam portion and a floor slab portion covering the beam portion and the pile head from above, the pile head and the pile portion are separated from the pier, and the floor slab portion and A first step of removing the superstructure composed of the beam portion; a second step of forming a floating structure by mooring the removed superstructure to the seabed or the riverbed in a form in which a floating body is added; It is characterized by having.
By constructing in this way, a structure that does not fulfill its function as a jetty is reused as a floating structure in a form that maintains the original shape of the superstructure consisting of the floor slab and beam. There is no need to crush the floor slab and beam.

Furthermore, 3rd invention for solving the said subject connects the pile part erected by intervals, the pile head joined to the upper end of these pile parts, and each adjacent pile head A method of reusing a pier composed of a beam portion to be formed and a floor slab portion covering the beam portion and the pile head portion from above, a first step of dividing the pier into blocks having a predetermined shape in plan view; A second step of cutting and removing the pile portion of the divided block at a position in contact with the bottom of the water or substantially in the middle thereof, and a form in which the removed pier is maintained in its original form, or a new structure or object And a third step of forming a new structure having a new function by being installed in the ocean or river.
By constructing in this way, the structure that no longer fulfills its function as a pier is reused in a form in which the entire pier consisting of floor slabs, beams, pile heads and piles is maintained in its original form. When used, it is not necessary to crush the floor slab, beam and pile head.

  According to the invention described in claim 1 of the present invention, an upper work composed of a floor slab part, a beam part, and a pile head part is separated from a structure whose function as a jetty is not satisfied due to aging or deterioration. It is removed and installed on land, ocean or river in a form that maintains the original state of the removed superstructure, or a new structure or object is added, forming a new structure with a new function, Since the superstructure consisting of floor slabs, beams and pile heads is reused in its original form without crushing the structure that has no longer fulfilled its function as a pier, dust and noise during crushing It does not occur and does not put a heavy load on the environment. In addition, a crushing device and an operator required for crushing are not required, and the cost required for reuse can be reduced.

  According to the invention described in claims 2 to 9, when forming the removed superstructure into each new structure having a new function, it is necessary to perform large-scale reinforcement / repair on the removed superstructure. In addition, it is easy to transport the removed superstructure to the reuse location, and the difficulty when constructing as a new structure is low, so the cost for reuse can be kept to a minimum. In addition, maintenance after installation is easy and maintenance costs can be reduced.

  According to the invention described in claim 10, the pile part and the pile head are separated from the structure that does not satisfy the function as a pier due to aging or deterioration, and the superstructure composed of the floor slab part and the beam part is removed, A floating structure is added to the removed superstructure and moored on the seabed or riverbed to form a floating structure. Since the superstructure consisting of the parts is reused as a floating structure in a form that maintains the original shape, there is no generation of dust and noise during crushing, and no heavy load is placed on the environment. In addition, a crushing device and an operator required for crushing are not required, and the cost required for reuse can be reduced.

  According to the eleventh aspect of the invention, a structure that does not satisfy the function as a jetty due to aging or deterioration is divided into blocks having a predetermined shape in plan view, and the pile portion of the divided blocks is submerged in the water bottom. The new pier is installed in the ocean or river in a form that keeps the original shape or a new structure or object added, and cuts and removes it at a position in contact with or in the middle. The entire pier consisting of floor slabs, beams, pile heads, and piles is maintained in its original form without crushing the structure that no longer functions as a pier. Since it is used, there is no generation of dust and noise during crushing, and it does not place a heavy load on the environment. In addition, a crushing device and a worker required for crushing are not required, and the cost required for reuse can be reduced. Furthermore, since no industrial waste is generated, the cost for processing the industrial waste is not required, which is a great economic advantage.

  According to the invention described in claims 12 to 16, when the removed pier is reused for each new structure having a new function, the removed pier has little reinforcement and repair, and the removed pier Since it is easy to transport to a place where it is reused, and the degree of difficulty in constructing as a new structure is low, the cost for reuse can be kept to a minimum.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIGS. 1 and 2, a pier 1 that is a harbor structure includes a steel pipe pile portion (pile portion) 2 erected at intervals and piles joined to the upper ends of these steel pipe pile portions 2. The head part 3 is comprised from the beam part 4 which connects the adjacent pile head part 3, and the floor slab part 5 which covers these beam part 4 and the pile head part 3 from upper direction.
The steel pipe pile part 2 is formed in a cylindrical shape, and as shown in FIGS. 1 and 2, a plurality of the steel pipe pile parts 2 are erected on the short side and the long side. A pile head 3 is joined to the upper ends of these steel pipe pile portions 2.
As shown in FIGS. 1 and 2, the pile head 3 is formed in a polygonal column shape having a predetermined thickness, and adjacent pile heads 3 are connected by a beam portion 4 having a substantially quadrangular prism shape. Further, the lower surface of the pile head 3 protrudes slightly below the lower surface of the beam portion 4, and a substantially rectangular space 13 is provided in a portion surrounded by the beam portion 4.
And the substantially rectangular floor slab part 5 is mounted on the upper surface of each pile head 3 and each beam part 4 by planar view. Moreover, although the concrete pavement 6 is given to the upper surface of the floor slab part 5, the floor slab part 5 in description here is demonstrated as a structure containing the concrete pavement 6. FIG.

Then, the structure that does not satisfy the function as the jetty 1 due to aging or deterioration is reused as in the embodiments of the invention described below.
First, a method for reusing a pier according to the first embodiment of the present invention, that is, a form of reusing an upper work composed of a floor slab part, a beam part, and a pile head, together with a reused new structure Description will be made based on the following forms (1) to (8).
(1) Form of reuse as a ramp The structure that does not fulfill its function as a pier 1 is a ramp 51 for launching a ship or caisson formed in a fishing port or the like and for lifting the ship, as shown in FIG. Are also reused.
The process from the jetty 1 until the ramp 51 is formed will be described with reference to FIGS. First, the slab part 5 and the beam part 4 are cut in order to divide the pier 1 into substantially rectangular blocks in plan view. Next, the joint of the divided block pile head 3 and the steel pipe pile portion 2 is cut to separate the steel pipe pile portion 2, and the superstructure comprising the floor slab portion 5, the beam portion 4 and the pile head portion 3 is separated. 10 is removed (first step). Then, the removed superstructure 10 is installed obliquely so that the upper surface of the floor slab portion 5 connects the water surface and the land, thereby forming a ramp 51 (second step).
Here, in the step of dividing the pier 1 into substantially rectangular blocks in plan view, the blocks are divided into blocks of an appropriate size in consideration of transportability and workability.

(2) Form of reuse as scouring prevention material As shown in Fig. 4, the structure that no longer fulfills its function as a pier 1 was installed on the seabed or riverbed near the revetment 20 provided on the coastline or riverbank. It is also reused as the scouring prevention material 52.
The process from the pier 1 until the scouring prevention material 52 is formed will be described with reference to FIGS. 1, 2, and 4. First, the slab part 5 and the beam part 4 are cut in order to divide the pier 1 into substantially rectangular blocks in plan view. Next, the joint of the divided block pile head 3 and the steel pipe pile portion 2 is cut to separate the steel pipe pile portion 2, and the superstructure comprising the floor slab portion 5, the beam portion 4 and the pile head portion 3 is separated. 10 is removed (first step). Then, the superstructure 10 thus removed is installed on the seabed or riverbed near the revetment 20 provided on the coast or river bank with the slab portion 5 facing upward to form the scouring prevention material 52 (first). Step 2).
Here, in the process of dividing the pier 1 into substantially rectangular blocks in a plan view, the size is such that scouring is not caused by the superstructure 10 itself when it is installed on the seabed or riverbed in consideration of transportability. It is divided into blocks.

(3) Form to be reused as a vibration preventing material for roads As shown in FIG. 5, the structure that does not satisfy the function as the pier 1 is also reused as a vibration preventing material 53 for the road 21.
The process from the jetty 1 to the formation of the vibration preventing material 53 of the road 21 will be described with reference to FIGS. First, the slab part 5 and the beam part 4 are cut in order to divide the pier 1 into substantially rectangular blocks in plan view. Next, the joint of the divided block pile head 3 and the steel pipe pile portion 2 is cut to separate the steel pipe pile portion 2, and the superstructure comprising the floor slab portion 5, the beam portion 4 and the pile head portion 3 is separated. 10 is removed (first step). Then, the removed superstructure 10 is embedded under the road 21 with the floor slab portion 5 facing upward to form the vibration preventing material 53 of the road 21 (second step).
Here, in the step of dividing the pier 1 into substantially rectangular blocks in plan view, the blocks are divided into blocks of a size that can be transported on land.

(4) Form of reuse as slope protection work The structure that does not satisfy the function as the pier 1 is also reused as the slope protection work 54 installed on the slope 22 as shown in FIG.
The process from the pier 1 until the slope protection work 54 is formed will be described with reference to FIGS. 1, 2, and 6. First, the slab part 5 and the beam part 4 are cut in order to divide the pier 1 into substantially rectangular blocks in plan view. Next, the joint of the divided block pile head 3 and the steel pipe pile portion 2 is cut to separate the steel pipe pile portion 2, and the superstructure comprising the floor slab portion 5, the beam portion 4 and the pile head portion 3 is separated. 10 is removed (first step). Then, the removed upper work 10 is installed on the slope 22 with the floor slab portion 5 facing upward to form a slope protection work 54 (second step).
In addition, after the superstructure 10 is installed on the slope 22, in order to prevent the superstructure 10 from falling, the end of the ground anchor 23 is fixed to the pile head 3 of the superstructure 10, and the superstructure 10 and the ground Are integrated with each other. Moreover, in the process of installing the removed superstructure 10 on the slope 22 with the floor slab portion 5 facing upward, the superstructure 10 divided into several blocks in order to improve transportability The method of joining and integrating and installing in the slope 22 is employ | adopted. In this embodiment, the ground anchor 23 corresponds to a new structure added to the superstructure 10 after removal.

(5) Form to be reused as a scenic facility in the park The structure that does not satisfy the function as the pier 1 is also reused as a scenic facility 55 installed in the park as shown in FIG.
The process from the pier 1 until the landscape facility 55 is formed will be described with reference to FIGS. First, the floor slab portion 5 and the beam portion 4 are cut in order to divide the pier 1 into substantially rectangular blocks in a plan view having a plurality of spaces 13 surrounded by the beam portions 4 and 4. Next, the pile head 3 of the divided block is cut at a position that is flush with the lower surface of the beam portion 4 to separate the steel pipe pile portion 2 from the pile head 3, and the floor slab portion 5, the beam portion 4. And the superstructure 10 which consists of the pile head 3 is removed (1st process). Then, the removed superstructure 10 is turned upside down in the direction in which the floor slab portion 5 is downward, and installed in the park, and the space 13 surrounded by the beam portions 4 and 4 is filled with water to fill the inside of the park. A landscape facility 55 is formed (second step).
Here, in the process of dividing the pier 1 into substantially rectangular blocks in a plan view having a plurality of spaces 13 surrounded by the beam portions 4 and 4, the blocks having an appropriate size are taken into consideration in consideration of transportability and workability. It is divided into. In this embodiment, water corresponds to an object added to the superstructure 10 after removal.

(6) Form of reuse as seabed plant pot for seaweed field construction The structure that does not satisfy the function as the pier 1 is also reused as a seabed flowerpot 56 for seaweed field construction as shown in FIG.
The process from the pier 1 to the formation of the seabed flower pot 56 for creating the seaweed bed will be described with reference to FIGS. 1, 2, and 8. First, the floor slab portion 5 and the beam portion 4 are cut in order to divide the pier 1 into substantially rectangular blocks in a plan view having a plurality of spaces 13 surrounded by the beam portions 4 and 4. Next, the pile head 3 of the divided block is cut at a position that is flush with the lower surface of the beam portion 4 to separate the steel pipe pile portion 2 from the pile head 3, and the floor slab portion 5, the beam portion 4. And the superstructure 10 which consists of the pile head 3 is removed (1st process). Then, the removed superstructure 10 is turned upside down so that the floor slab portion 5 faces downward, and is installed in the grilled area with shells and the like packed in the space 13 surrounded by the beam portions 4 and 4. A seabed flower pot 56 for creating a seaweed bed is formed (second step). If comprised in this way, it will become the porous structure which has many space | gap in the surface where the shell of the space 13 was packed, and the environment where algae tends to settle will be formed. Moreover, in this embodiment, a shell corresponds to the object added to the superstructure 10 after removal.

(7) Form to be reused as a dido pool As shown in FIG. 9, the structure that does not satisfy the function as the pier 1 is also reused as a dido pool 57 installed in the tidal zone 15. In FIG. 9, four dido pools 57 are installed.
The process from the jetty 1 to the formation of the dido pool 57 will be described with reference to FIGS. First, the floor slab portion 5 and the beam portion 4 are cut in order to divide the pier 1 into substantially rectangular blocks in a plan view having a plurality of spaces 13 surrounded by the beam portions 4 and 4. Next, the pile head 3 of the divided block is cut at a position that is flush with the lower surface of the beam portion 4 to separate the steel pipe pile portion 2 from the pile head 3, and the floor slab portion 5, the beam portion 4. And the superstructure 10 which consists of the pile head 3 is removed (1st process). Then, the removed superstructure 10 is installed on the tidal belt 15 in a state where the floor slab portion 5 is turned upside down so as to form a dido pool 57 (second step). If comprised in this way, at the time of low tide, seawater will accumulate in the space 13 enclosed by the beam parts 4 and 4, and this site | part becomes a habitat of various living organisms. Further, the dido pool 57 is fixed to the tidal zone 15 by a ground anchor (not shown) or the like so as not to be washed away by waves or the like.
Here, in the step of dividing the pier 1 into substantially rectangular blocks in a plan view having a plurality of spaces 13 surrounded by the beam portions 4 and 4, the block size is set to 10 m ² or more in order to function as the dido pool 57. Divided as set. In this embodiment, the ground anchor corresponds to a new structure added to the superstructure 10 after removal.

(8) Form to be reused as planting basin As shown in FIG. 10, the structure that does not satisfy the function as the pier 1 is also reused as the planting basin 58 installed in the waterfront area.
The process from the pier 1 until the planting water board 58 is formed will be described with reference to FIGS. 1, 2, and 10. First, the floor slab portion 5 and the beam portion 4 are cut in order to divide the pier 1 into substantially rectangular blocks in a plan view having a plurality of spaces 13 surrounded by the beam portions 4 and 4. Next, the pile head 3 of the divided block is cut at a position that is flush with the lower surface of the beam portion 4 to separate the steel pipe pile portion 2 from the pile head 3, and the floor slab portion 5, the beam portion 4. And the superstructure 10 which consists of the pile head 3 is removed (1st process). Then, the removed superstructure 10 is turned upside down so that the floor slab 5 is directed downward, and the raw water such as rivers, lakes, ponds, etc. is sent to the space 13 surrounded by the beam parts 4, 4. While installing in an area | region, a water culture plant is planted in this space 13, and the planting water board 58 is formed (2nd process).
Here, in the process of dividing the pier 1 into substantially rectangular blocks in a plan view having a plurality of spaces 13 surrounded by the beam portions 4 and 4, the blocks having an appropriate size are taken into consideration in consideration of transportability and workability. It is divided into. In this embodiment, water and a hydroponic plant are equivalent to the object added to superstructure 10 after removal.

Next, a method for reusing a pier according to the second embodiment of the present invention, that is, a form of reusing an upper work composed of a floor slab part and a beam part, together with the reused new structure ( This will be described based on the form 9).
(9) Form to be reused as an artificial floating island As shown in FIG. 11, the structure that does not satisfy the function as the pier 1 is reused as an artificial floating island 59 that is a floating structure.
The process from the jetty 1 until the artificial floating island 59 is formed will be described with reference to FIGS. 1, 2, and 11. First, in order to divide the pier 1 into substantially rectangular blocks in plan view, the floor slab portion 5 and the beam portion 4 are cut and separated from the pile head portion 3 and the steel pipe pile portion 2, and the floor slab portion 5 and the beam portion. 4 is removed (first step). Then, a floating body 11 such as polystyrene foam is added below the floor slab portion 5 of the removed superstructure 10 'and moored with a rope or chain (chain 12 in FIG. 3) on the seabed or riverbed (second chain). Process). Finally, vegetation is applied to the upper surface of the floor slab portion 5 of the upper work 10 'to form an artificial floating island 59.
Here, in the step of dividing the pier 1 into a substantially rectangular block in plan view, it is desirable to divide the pier 1 into a substantially rectangular block having sides of about 2 m to 3 m from the viewpoint of transportability, workability, durability, and the like. However, it may be triangular or hexagonal.
Moreover, in this embodiment, although the structure which comprises a floating structure as the artificial floating island 59 which gave the vegetation to the upper surface of the floor slab part 5 of superstructure 10 'was demonstrated, it is not a floating fish reef for migratory fish. It can also be configured.

As described above, according to the pier reuse method according to the first and second embodiments, when the structure that does not satisfy the function as the pier 1 is reused, the floor slab portion 5, the beam portion 4, and Since the upper work 10 consisting of the pile head 3 or the upper work 10 'consisting of the floor slab part 5 and the beam part 4 is reused without crushing, dust and noise during crushing are not generated, and the environment Does not put a heavy load on Moreover, since the crushing apparatus and operation | work for crushing are unnecessary, the expense at the time of reuse can be reduced significantly.
In addition, when the structure that does not satisfy the function as the pier 1 by the reuse method according to the first and second embodiments is reused for each of the new structures (1) to (9) described above, There is no need to reinforce and repair the removed superstructures 10 and 10 ', and the pier 1 is divided into several blocks of an appropriate size in consideration of transportability and workability. Thus, no major problems occur during transportation. Moreover, the degree of difficulty in constructing each new structure is low, and maintenance after installation is easy and practical.

In addition, as an example in which a structure that does not satisfy the function as the pier 1 is reused for a new structure other than the above-mentioned (1) to (9), the floor slab part 5 and the beam part 4 are each independently a predetermined shape. After removing the floor slab part 5 and the beam part 4 that have been removed and repaired and reinforced, they can be reused as precast members for the floor slab part 5 and the beam part 4 of the newly constructed pier 1 again. Is possible.
Further, the removed superstructure 10 consisting of the floor slab 5, the beam 4 and the pile head 3, or the superstructure 10 ′ consisting of the floor slab 5 and the beam 4 is stacked on the sea floor and reused as a seabed mountain range. It is also possible.

Next, a method for reusing a pier according to the third embodiment of the present invention, that is, a form of reusing the entire pier including a floor slab part, a beam part, a pile head part, and a steel pipe pile part is reused. A description will be given based on the following (10) to (14) together with the new structure.
(10) Form of reuse as a mooring facility for a ship As shown in FIG. 12, a structure that does not satisfy the function as a pier 1 is reused as a mooring facility 60 for a ship.
The process from the pier 1 until the ship mooring facility 60 is formed will be described with reference to FIGS. 1, 2, and 12. First, in order to divide the pier 1 into substantially rectangular blocks in plan view, the floor slab portion 5 and the beam portion 4 are cut (first step). Next, the steel pipe pile part 2 of this divided | segmented block is cut | disconnected and removed in the position which contact | connects a water bottom (2nd process). Then, the pier 1 thus removed is turned upside down in the direction in which the steel pipe pile portion 2 protrudes upward, and is installed on the seabed or riverbed to form a mooring facility 60 for the ship (third step).
Here, in the process of dividing the pier 1 into substantially rectangular blocks in a plan view, the steel pipe pile portion 2 may be divided into substantially square blocks located in the center, or the steel pipe pile portion 2 is in the short direction. Although it may be divided into substantially rectangular blocks so as to be arranged in a straight line at substantially the center, the shape is appropriately determined in consideration of transportability and workability.
Moreover, in the process of installing the jetty 1 divided into each block and turned upside down on the seabed or riverbed, it is installed in a straight line parallel to the mooring pier or jetty, and each steel pipe pile 2 and the mooring pier or jetty The ship may be moored with a rope or the like in between, and as shown in FIG. 12, it is installed in two lines in a straight line, and the ship is moored with a rope or the like between the opposing steel pipe pile portions 2 and 2 You may make it the structure to make.

(11) Form to be reused as a fishing park The structure that does not satisfy the function as the pier 1 is also reused as a fishing park 61 as shown in FIG.
The process from the pier 1 until the fishing park 61 is formed will be described with reference to FIGS. 1, 2, and 13. First, in order to divide the pier 1 into substantially rectangular blocks in plan view, the floor slab portion 5 and the beam portion 4 are cut (first step). Next, the steel pipe pile part 2 of this divided | segmented block is cut | disconnected and removed in the position which contact | connects a water bottom (2nd process). Then, the removed pier 1 is turned upside down in the direction in which the steel pipe pile portion 2 protrudes upward, and plural steel pipe pile portions 2 are installed in a straight line on the seabed or riverbed and protruded from the water surface. A fishing girder 61 is formed by spanning the bridge girder 25 over the upper end (third step).
Further, in the step of dividing the pier 1 into substantially rectangular blocks in plan view, the steel pipe pile portion 2 is divided into substantially square blocks located in the center, and the divided and removed blocks are straightened to the seabed or riverbed. In the process of installing in the shape, it installs with the space | interval required in order to support the bridge girder 25 stably. In this embodiment, the bridge girder 25 corresponds to a new structure added to the pier 1 after removal.

(12) Form to be reused as impact prevention work for piers The structure that does not satisfy the function as the pier 1 is also reused as an impact prevention work 62 for the pier 26 as shown in FIG.
The process from the pier 1 to the formation of the impact prevention work 62 for the pier 26 will be described with reference to FIGS. First, in order to divide the pier 1 into substantially rectangular blocks in plan view, the floor slab portion 5 and the beam portion 4 are cut (first step). Next, the steel pipe pile part 2 of this divided | segmented block is cut | disconnected and removed in the position which contact | connects a water bottom (2nd process). Then, the removed pier 1 is turned upside down in the direction in which the steel pipe pile portion 2 protrudes upward, and a plurality of pieces are installed around the pier 26, and the upper portions of the adjacent steel pipe pile portions 2, 2 are connected to the connecting plate. 27, the impact prevention work 62 of the pier 26 is formed (3rd process).
Moreover, in the process of dividing the pier 1 into substantially rectangular blocks in plan view, the steel pipe pile portion 2 is divided into substantially square blocks located in the center. Moreover, in the process of installing the removed block around the pier 26, as shown in FIG. 14, each steel pipe pile portion is provided on each of both side surfaces (upstream and downstream surfaces with respect to the river) of the pier 26. Three lines are set up so that a line connecting 2 draws a triangle. However, the present invention is not limited to this form of installation, and the bridge pier 26 may be installed so as to surround both sides of the pier 26 in order to protect the pier 26 and reduce damage to the ship colliding with the pier 26. In this embodiment, the connecting plate 27 corresponds to a new structure added to the jetty 1 after removal.

(13) Form of reuse as a breakwater A structure that does not fulfill its function as a pier 1 is also reused as a breakwater 63 as shown in FIG.
The process from the jetty 1 until the breakwater 63 is formed will be described with reference to FIGS. 1, 2, and 15. First, in order to divide the pier 1 into substantially rectangular blocks in plan view, the floor slab portion 5 and the beam portion 4 are cut (first step). Next, the steel pipe pile part 2 of this divided | segmented block is cut | disconnected and removed in the position which contact | connects a water bottom (2nd process). Then, the removed pier 1 is turned upside down in the direction in which the steel pipe pile portion 2 projects upward, and a plurality of straight lines are installed on the seabed or the riverbed. 28 is attached to form a breakwater 63 (third step).
Here, in the step of dividing the pier 1 into a substantially rectangular block in plan view, the steel pipe pile portion 2 may be divided into a substantially rectangular block so that a plurality of the steel pipe pile portions 2 are arranged in a straight line at a substantially center in the short side direction. Although the steel pipe pile part 2 may be divided into substantially square blocks located in the center, the shape is appropriately determined in consideration of transportability and workability. In this embodiment, the curtain wall 28 corresponds to a new structure added to the jetty 1 after removal.

(14) Form of reuse as seawater exchange type dike / promenade / cycling road The structure which does not satisfy the function as the pier 1 is also reused as seawater exchange type dike / promenade / cycling road 64.
The process from the pier 1 to the formation of the seawater exchange type dike / walkway / cycling road 64 will be described with reference to FIGS. 1, 2, and 16. First, in order to divide the pier 1 into substantially rectangular blocks in plan view, the floor slab portion 5 and the beam portion 4 are cut (first step). Next, the steel pipe pile part 2 of this divided | segmented block is cut | disconnected and removed in the position which contact | connects a water bottom, or its intermediate part (2nd process). From this removed pier 1, an inverted division body 64 a that is vertically inverted in a direction in which the steel pipe pile portion 2 protrudes upward and a normal rotation division body 64 b that the floor slab portion 5 faces upward are viewed from above and below. Overlapping, each steel pipe pile part 2, 2 forms a structure that functions as a pillar, and the structure is placed side by side on the waterline in the natural park to form a seawater exchange type dike / walkway / cycling road 64 ( (3rd process).
Here, in the step of dividing the pier 1 into substantially rectangular blocks in plan view, for example, when the pier 1 is divided into substantially rectangular blocks in which two steel pipe piles 2 are arranged on one side, the inverted divided body 64a and forward rotation When the divided body 64b is overlapped, the steel pipe piles 2 and 2 of the inverted divided body 64a and the forward divided body 64b are arranged at the four corners of the structure as shown in FIG. 16 and function sufficiently as columns. become. However, the present invention is not limited to this, and when the inverted divided body 64a and the forward divided body 64b are overlapped, the steel pipe piles 2 and 2 of the inverted divided body 64a and the forward rotated divided body 64b function sufficiently as pillars of the structure. What is necessary is just to divide the pier 1 so that it may become the arrangement | positioning to perform.

According to the reuse method of the jetty according to the third embodiment described above, the structure that does not satisfy the function as the jetty 1 can be reused in a form that maintains its original shape. In addition to the effects obtained by the method of reusing the jetty according to the second and second embodiments, the cost of treating industrial waste is unnecessary, which is a great economic advantage.
In addition, when forming each of the new structures (10) to (14) described above by the jetty reusing method according to the third embodiment, the jetty according to the first and second embodiments may be reused. Effects similar to those obtained when forming each of the new structures (1) to (9) described above can be obtained by the method of use.

  In addition, in the pier 1 to which the reuse method according to the embodiment of the present invention described above is applied, the pile portion is configured by the steel pipe pile portion 2, but the present invention is also applied to the pier 1 configured by reinforced concrete piles. The reuse method can be applied.

  In addition, the new structure referred to in the present invention corresponds to an artificially manufactured structure, for example, in this embodiment, the ground anchor 23, the bridge girder 25, the curtain wall 28, and the like. For example, in the present embodiment, it corresponds to water, shells, hydroponic plants, and the like. In addition to the present embodiment, when a new structure is formed by reusing a structure that does not satisfy the function as the pier 1, a new structure or object suitable for the purpose is appropriately added and formed. be able to.

FIG. 1 is a perspective view of a jetty in which a reuse method according to an embodiment of the present invention is adopted. FIG. 2 is an enlarged cross-sectional view showing a part of the pier of FIG. FIG. 3 is a perspective view showing a ramp provided in a fishing port. FIG. 4 is a side view showing the scour preventing material. FIG. 5 is a side view showing a road vibration preventing material. FIG. 6 is a side view showing a slope protection work. FIG. 7 is a perspective view showing a landscape facility in the park. FIG. 8 is a perspective view showing a seabed flowerpot for creating a seaweed bed. FIG. 9 is a perspective view showing the dido pool. FIG. 10 is a perspective view showing a planting water board. FIG. 11 is a perspective view showing an artificial floating island. FIG. 12 is a perspective view showing a ship mooring facility. FIG. 13 is a perspective view showing a fishing park. FIG. 14 is a perspective view showing an impact prevention work for a bridge. FIG. 15 is a perspective view showing a breakwater. FIG. 16 is a perspective view showing a seawater exchange type bank / walkway / cycling road.

Explanation of symbols

1 Pier, 2 Steel Pipe Pile (Pile), 3 Pile Head, 4 Beam, 5 Floor Slab, 10 Superstructure, 10 'Superstructure, 11 Floating Structure, 12 Chain, 13 Space, 15 Tidal Zone, 20 Seawall , 22 slope, 25 bridge girder, 26 pier, 27 connecting plate, 28 curtain wall, 51 ramp, 52 scouring prevention material, 53 vibration prevention material, 54 slope protection work, 55 park scenic facility, 56 seaweed ground Seabed flower pots for creation, 57 Dydo pool, 58 planting basin, 59 artificial floating island (floating structure), 60 ship mooring facilities, 61 fishing park, 62 bridge pier, 63 breakwater, 64 seawater exchange type dike and promenade・ Cycling road, 64a inverted division, 64b forward division

Claims (16)

A plurality of pile portions standing at intervals, a pile head joined to the upper ends of these pile portions, a beam portion connecting adjacent pile heads, and covering these beam portions and pile heads from above In the reuse method of the pier composed of the floor slab part,
The first step of separating the pile portion from the pile head and removing the superstructure composed of the floor slab portion, the beam portion, and the pile head, and the form of maintaining the original shape of the removed superstructure Or a second step of forming a new structure having a new function by being installed on land, ocean, or river in a form to which a new structure or object is added. Method. In the second step, the removed superstructure is installed obliquely so that the upper surface of the floor slab connects the water surface and the land, and a ramp for launching a ship, caisson, etc. and lifting the ship is provided. The method for reusing a pier according to claim 1, wherein the method is a forming step. In the second step, the removed superstructure is installed on the seabed or riverbed near the revetment provided on the coast or riverside with the floor slab facing upward to form a scouring prevention material. The method for reusing a pier according to claim 1, wherein the method is a process. The second step is a step of burying the removed superstructure under the road so that the floor slab is in an upward direction to form an anti-vibration material for the road. Reuse method of pier as described in. 2. The second step is a step of forming a slope protection work by installing the removed superstructure on a slope with the floor slab facing upward. How to reuse the described pier. The pier has a structure having a space surrounded by the beam portion. In the second step, the removed superstructure is turned upside down in the direction in which the floor slab is downward and installed in the park. The method for reusing a pier according to claim 1, wherein the space is filled with water to form a landscape facility in a park. The pier has a structure having a space surrounded by the beam portion. In the second step, the removed superstructure is turned upside down in the direction in which the floor slab portion is downward, and a shell is formed in the space. The method for reusing a pier according to claim 1, wherein the method is a step of forming a submarine flowerpot for seaweed formation by setting it in a burning area in a state where stuffed or the like is packed. The pier is configured to have a space surrounded by the beam portion, and the second step is to install the removed superstructure upside down in a direction in which the floor slab portion is downward and to be installed in a tidal zone. The method for reusing a pier according to claim 1, wherein the method is a step of forming a dido pool. The pier is configured to have a space surrounded by the beam portion, and the second step is to turn the removed superstructure upside down in a direction in which the floor slab portion is downward, The jetty according to claim 1, wherein the pier is installed in a border area where raw water such as a pond is sent to the space, and a hydroponic plant is planted in the space to form a planting basin. How to reuse. A plurality of pile portions standing at intervals, a pile head joined to the upper ends of these pile portions, a beam portion connecting adjacent pile heads, and covering these beam portions and pile heads from above In the reuse method of the pier composed of the floor slab part,
A first step of separating the pile head portion and the pile portion from the pier and removing the superstructure composed of the floor slab portion and the beam portion, and the submarine in a form in which a floating body is added to the removed superstructure. Or a second method of mooring on the riverbed to form a floating structure. A plurality of pile portions standing at intervals, a pile head joined to the upper ends of these pile portions, a beam portion connecting each adjacent pile head, and these beam portions and pile heads from above In the reuse method of the pier composed of the covering slab part,
A first step of dividing the pier into blocks of a predetermined shape in plan view, and a second step of cutting and removing the pile portion of the divided block at a position in contact with the water bottom surface or a substantially intermediate portion thereof. A third step of installing the removed pier in its original form or adding a new structure or object to the ocean or river to form a new structure having a new function; A method for reusing a pier characterized by comprising: The third step is a step of forming the mooring facility of the ship by turning the removed pier upside down in the direction in which the pile portion protrudes upward and installing it on the seabed or riverbed. The method for reusing a pier according to claim 11. In the third step, the removed pier is inverted up and down in the direction in which the pile portion protrudes upward, and a plurality of the piers are installed at linear intervals on the seabed or riverbed to project from the water surface. The method for reusing a pier according to claim 11, wherein a fishing park is formed by bridging a bridge girder over an upper end of each pile portion provided. In the third step, the removed pier is turned upside down in the direction in which the pile portion protrudes upward, and a plurality of pieces are installed around the pier, and the upper portion of the adjacent pile portion is connected with a connecting plate. The method for reusing a pier according to claim 11, wherein the method is a step of forming an impact prevention work for the connected piers. In the third step, the removed pier is turned upside down in a direction in which the pile portion protrudes upward, and a plurality of lines are installed in a straight line on the seabed or riverbed, and a curtain wall is provided on each pile portion. The method for reusing a pier according to claim 11, wherein the method is a step of attaching and forming a breakwater. In the third step, from the removed jetty, an inverted division body that is vertically inverted in a direction in which the pile portion protrudes upward, and a forward rotation division body in which the floor slab portion faces upward, It is a process of forming a seawater exchange type dike / promenade / cycling road where piles are stacked from above and below to form a structure in which each pile part functions as a pillar, and the structure is placed side by side on the shoreline in the natural park. The method for reusing a pier according to claim 11.

Images