JP6965493B2 - Wave-proof structure of pile support structure and its construction method - Google Patents

Description

The present invention relates to a wave-proof structure of a pile-supporting structure in which a wave-proof wall is held by a pile-supporting structure such as a pier, and a method for constructing the same.

Conventionally, in pile support structures such as ship lifts and pile breakwaters that use pier structures, in order to suppress the influence of waves reaching the water area under the superstructure, the front side of the pile support structures such as pile breakwaters is used. A wave-proof structure with a break-water wall is known.

This type of wave barrier has a structure in which a concrete curtain wall is integrally formed with a concrete superstructure, or a structure in which the upper end of a curtain wall made of steel sheet pile is embedded in a concrete superstructure. Etc. are known.

Further, as a conventional curtain wall, a concrete curtain wall is also known to be supported by a holding member fixed to a pile and a superstructure (see, for example, Reference 1).

Japanese Unexamined Patent Publication No. 58-29913

However, in the conventional technique as described above, when the concrete curtain wall is integrally formed with the superstructure, it is possible to use the precast concrete superstructure with the curtain wall in consideration of maintainability and underwater installation. Although it is common, there is a problem that the construction becomes large-scale, such as the large scale of the structure requiring a large crane vessel for the installation work.

On the other hand, in the case of a curtain wall made of steel sheet piles, the construction of the superstructure is complicated because the structure is such that the steel sheet piles are combined to form a wall body at the time of installation and the upper end thereof is embedded in the concrete superstructure. There was a problem such as.

In addition, if it is necessary to replace the curtain wall due to deterioration over time, it is necessary to dismantle a part of the superstructure for both concrete and steel sheet piles, which requires a large amount of work and costs. There was a problem in maintenance because it was bulky.

Therefore, in view of such conventional problems, the present invention has been made for the purpose of providing a wave-proof structure of a pile support structure that can be efficiently constructed and repaired, and a method for constructing the wave-proof structure.

The feature of the invention according to claim 1 for solving the above-mentioned conventional problems is a pile support in which a wave barrier is held by a pile support structure in which a superstructure is joined to the head of a pile column. In the wave-proof structure of the structure, the upper fixing member fixed to the superstructure, the lower fixing member fixed to the pile column, and one or more wave-proof members formed to a predetermined width and height. A panel body made of a panel is provided, an upper end portion of the panel body is fixed to the upper fixing member, a lower portion of the panel body is fixed to the lower fixing member, and the protection of an arbitrary width and height is provided. The wave wall is formed.

The feature of the invention according to claim 2 is that, in addition to the configuration of claim 1, the wave-proof panel includes a bearing member installed at the upper end, and the bearing member is supported by the upper fixing member. It is fixed via a rotation shaft.

A feature of the invention according to claim 3 is that, in addition to the configuration of claim 1 or 2, slits are formed between the panel bodies arranged at intervals in the lateral direction.

The feature of the invention according to claim 4 is 1 in the method for constructing a wave-proof structure of a pile support structure in which a wave-proof wall is held by a pile support structure in which a superstructure is joined to the head of a pile column. Alternatively, a panel body is formed by waveproof panels formed to a plurality of predetermined widths and heights, and the upper end portion of the panel body is fixed to an upper fixing member fixed to the superstructure, and the lower side of the panel body is fixed. The purpose is to fix the portion to the lower fixing member fixed to the pile column body to form the wave barrier of an arbitrary width and height.

The feature of the invention according to claim 5 is that, in addition to the configuration of claim 4, a bearing member is provided at the upper end of the panel body, and the panel body is lifted with the surface facing upward. After fixing the bearing member to the support shaft member supported by the upper fixing member via a rotation shaft, the lower portion of the panel body is rotated toward the lower fixing member side. The purpose is to fix the lower portion of the panel body to the lower fixing member.

The feature of the invention according to claim 6 is that, in addition to the configuration of claim 4 or 5, upper hanging tools and lower hanging tools are provided on the upper and lower front sides of the upper fixing member, respectively, and the superstructure is provided. A lifting means is provided on the lower surface of the floor slab, the upper and lower side fixing members are lifted with the front side facing upward, and the hanging member drawn out from the lifting means is attached to the upper hanging tool, and then the upper side. The present invention is to suspend the fixing member while rotating it, suspend it by the lifting means, wait for it to a predetermined position by the hanging means, and then fix the upper fixing member to the superstructure.

The wave-proof structure of the pile support structure according to the present invention has a wave-proof structure having a width and height desired for a pile support structure such as a ship lift or a pile-type breakwater by providing the configuration according to claim 1. Can be easily installed. Further, when the wave barrier needs to be renewed or repaired due to aged deterioration or the like, only the panel body to be renewed or the like can be easily removed and replaced, so that the repair can be easily performed. In addition, it can be replaced with existing breakwaters such as pile-type breakwaters or retrofitted.

Further, in the present invention, by providing the configuration according to claim 2, the work of fixing the upper end portion of the panel body can be performed on water. In addition, the installation work of the panel body can be performed by a crane or the like installed on the superstructure, and the work can be performed without using a hoist ship.

Further, in the present invention, by providing the configuration according to claim 3, the wave pressure on the wave barrier can be reduced. Further, if necessary, a slit can be easily formed in the wave barrier.

The method for constructing a wave-proof structure of a pile-supporting structure according to the present invention has a wave-proof structure having a width and height desired for a pile-supporting structure such as a pile-type breakwater by providing the configuration according to claim 4. Can be easily installed. Further, when the wave barrier needs to be renewed or repaired due to aged deterioration or the like, only the panel body to be renewed or the like can be easily removed and replaced, so that the repair can be easily performed.

Further, in the present invention, by providing the configuration according to claim 5, the work of fixing the upper end portion of the panel body can be performed on water. In addition, the installation work of the panel body can be performed with a crane installed on the superstructure, and it can be constructed without using a hoist ship, so existing breakwaters such as pile-type breakwaters can be replaced or retrofitted. can do.

Further, in the present invention, by providing the configuration according to claim 6, even when the floor slab is overhanging to the outside, the fixing work of the upper fixing member is performed by a crane or the like installed on the superstructure. It can be constructed without using a crane vessel.

It is a front view which shows an example of the wave-proof structure of the pile support structure which concerns on this invention. It is a vertical sectional view of the same as above. It is a perspective view which shows an example of the upper fixing member in FIG. It is a top view which shows an example of the lower fixing member of the same above. It is a perspective view which shows the front part of the panel body which consists of the wave-proof panel of the same above. It is a front view which shows the wave-proof structure of the pile support structure provided with the same slit. (a) is a front view showing the same wave-proof panel as above, and (b) is a vertical sectional view of the same. It is a vertical cross-sectional view which shows the state of the initial stage in the wave-proof structure construction method of the pile support structure which concerns on this invention. It is a vertical cross-sectional view which shows the state of the installation preparation work of the upper fixing member of the same above. It is a vertical cross-sectional view which shows the state of the attachment work of the upper fixing member of the same above. It is a vertical cross-sectional view which shows the state of the attachment work of the lower fixing member of the same above. It is a vertical cross-sectional view which shows the state of the installation preparation work of the panel body of the same above. It is a vertical cross-sectional view which shows the state of the attachment work of the panel body of the same above.

Next, an embodiment of the wave-proof structure of the pile-type structure according to the present invention will be described based on the examples shown in FIGS. 1 to 7. Reference numeral 1 in the drawing is a pile support structure such as a pile type breakwater.

The pile-type structure 1 includes a plurality of pile columnar bodies 3, 3 ... cast on the bottom portion 2 and a concrete superstructure 4 joined to the heads of the pile columnar bodies 3, 3 ... ing.

As shown in FIGS. 1 and 2, the superstructure 4 includes a joint portion 5 to which the heads of the pile columnar bodies 3, 3 ... Are joined, and a beam portion 6 for connecting the joint portions 5 and 5. The floor slab 7 is supported on the upper surfaces of the joint portion 5 and the beam portion 6.

The deck 7 has a structure in which its ends project to the outside from the joint portion 5 and the beam portion 6 arranged on the offshore side.

Further, in the pile type structure 1, a wave-proof wall 8 that reaches a predetermined depth in water is held on the outside, and a wave-proof structure for suppressing waves is formed.

The wave-proof structure of the pile-type structure 1 includes an upper fixing member 9 fixed to the superstructure 4, a lower fixing member 10 fixed to the pile columnar bodies 3, 3 ..., And one or a plurality of predetermined widths. A wave-proof wall 8 is formed by fixing the panel body 12 to the upper fixing member 9 and the lower fixing member 10 with a panel body 12 composed of wave-proof panels 11, 11 ... There is.

As shown in FIG. 3, the upper fixing member 9 includes a beam-shaped upper horizontal member 20 and fixing portions 21 and 21 fixed to the upper surface of the upper horizontal member 20, and is superstructured via the fixing portions 21 and 21. It is fixed to the side surface of the beam portion 6 or the joint portion 5 of 4.

Further, the upper fixing member 9 is provided with an upper hanger 22 and a lower hanger 23 on the upper and lower sides of the front side, respectively, so that the upper fixing member 9 can be lifted with the front side facing upward by a crane or the like.

The upper horizontal member 20 includes an elongated plate-shaped front plate 20a long in the horizontal horizontal direction, a top plate 20b and a bottom plate 20c extending rearward from the upper and lower edges of the front plate 20a, and a panel body on the surface of the front plate 20a. A plurality of support shaft members 23, 23 ... Are fixed at intervals according to the width of 12.

The top plate 20b and the bottom plate 20c are provided with notches 24, 24 at both end portions, and the notches 24, 24 are fitted into the notches 24, 24 in accordance with the shape of the joint portion 5 of the superstructure 4, so that the trailing edge is a beam portion. It can be fixed to the 6 side surfaces of the beam portion in a state of being in contact with the 6 side surfaces.

Each of the support shaft members 23, 23 ... Is formed in a plate shape by a steel plate material, is vertically fixed to the front surface of the front plate 20a with the plate thickness direction horizontal, and a shaft insertion hole 23a is formed in the central portion. ing.

Further, the support shaft members 23, 23 ... Also function as a lower hanger when hoisting by a crane or the like.

The lower ends of the fixing portions 21 and 21 are fixed to a plate-shaped fixing plate 21a whose lower end is fixed to the trailing edge of the upper surface of the upper horizontal member 20 by welding or the like, and to the front side of the fixing plate 21a in an orthogonal arrangement with the fixing plate 21a. Is provided with a rib portion 21b fixed to the upper surface (top plate 20b) of the upper horizontal member 20 by welding or the like, and the fixing plate 21a is fixed to the side surface of the beam portion 6 of the superstructure 4 by a bolt 25 to fix the upper fixing member 9 Is fixed to the side surface of the beam portion 6. In the figure, reference numeral 26 is a bolt insertion hole through which the bolt 25 formed in the fixing plate 21a is inserted, and reference numeral 27 is a female screw anchor into which the bolt 25 is screwed.

The rib portion 21b is formed in a trapezoidal shape having an inclined portion on the front surface side, and the upper hanger 22 is fixed to the upper end portion of the front surface.

As shown in FIG. 4, the lower fixing member 10 includes a support member 30 fixed to the outer surfaces of the pile columnar bodies 3, 3 ... By welding or the like, and a beam-shaped lower horizontal member 31 made of H-shaped steel. The lower lateral member 31 is fixed to each support member 30 by bolting or welding, and is supported in a state of being bridged between the support members 30 and 30.

The lower horizontal member 31 includes flange portions facing each other and rib portions connecting both flange portions, and is formed in an H-shaped cross section. One flange portion is fixed to the support member 30, and the other flange portion 31 is provided. The part is located on the offshore side.

A plurality of bolt insertion holes (not shown) are formed in the other flange portion so as to communicate with the bolt holes provided in the lower portion of the panel body 12 at intervals in the longitudinal direction.

As shown in FIG. 5, the panel body 12 is formed by joining one or a plurality of wave-proof panels 11, 11 ... Formed to a predetermined width and height in the horizontal direction and, if necessary, in the vertical direction. , Waveproof panels 11, 11 ... Can be formed into a desired width and height.

Then, each panel body 12 formed to a desired width and height is fixed between the wave-proof panels 11 and 11 with bolts or the like, and the upper end portion of the entire panel body 12 is fixed to the upper fixing member 9 and is on the lower side. A portion is fixed to the lower fixing member 10, and a wave barrier 8 formed to a desired width and height is held on the outside of the pile support structure 1.

Further, as shown in FIG. 6, the panel bodies 12 may be arranged at intervals in the lateral direction so that slits 55 and 55 are formed between the adjacent panel bodies 12.

As shown in FIG. 7, the wave-proof panels 11, 11 ... Have a frame portion 40 having upper, lower, left and right side plates 40a to 40d, and a panel main body 41 for closing the front side of the frame portion 40, and the front side is closed. It is formed in a hollow rectangular parallelepiped shape having a predetermined width and height. The wave-proof panels 11, 11 ... do not have to have the same width and height, and a plurality of types having different widths and heights are prepared, and the wave-proof panels have different widths according to the installation target dimensions. Panels may be combined. The thickness of the wave-proof panel 11 is determined based on the assumed wave pressure of the wave and the interval at which the panel body 12 is installed.

The frame portion 40 is formed by combining angle steels into a rectangular frame shape having upper, lower, left and right side plates 40a to 40d, and a rectangular frame-shaped overhanging portion 40e is formed on each front side edge of the upper, lower, left and right sides. ing.

Further, the frame portion 40 is provided with ribs 40f and 40f for connecting the left and right side plates 40c and 40d at intervals in the vertical direction.

Further, a pair of bearing members 42, 42 facing each other on the upper surface of the upper plate 40a are fixed to each frame portion 40 in the horizontal and horizontal directions, and the mounting member 43 is fixed to the lower surface of the lower plate 40b. Has been done.

The bearing members 42, 42 are formed in a plate shape, have a shaft insertion hole 42a in the center, and the support shaft member 23 of the upper fixing member 9 is inserted between the bearing members 42, 42, and the bearing members 42, 42 are both. The rotation shaft 44 is rotatably fixed by the rotation shaft 44 by passing the rotation shaft 44 through the shaft insertion holes 23a and 42a of the support shaft member 23.

The rotating shaft 44 is composed of bolts penetrating the shaft insertion hole 23a, and a nut is screwed into the bolts penetrating the bearing members 42, 42 and the support shaft member 23, and the bearing members 42, 42 and the support shaft member are screwed together. 23, 23 ... Are fixed in the horizontal direction so as not to be detached, and can be rotated in the vertical direction.

The mounting member 43 includes a mounting plate 43a fixed to the trailing edge of the lower plate and support pieces 43b and 43b that support both sides of the mounting plate 43a, and a bolt insertion hole 43c is formed in the center of the mounting plate 43a. ing.

Further, the left and right side plates 40c, 40d of the frame portion 40 are provided with a plurality of bolt insertion holes 46, 46 ... It can be connected.

The panel body 41 is formed in a rectangular shape made of a plate material such as a steel plate that matches the shape of the frame portion 40, and is fixed to the front surface portion of the frame portion 40 by welding or the like.

The mode of the panel main body 41 is not particularly limited, and for example, a plate material such as a steel plate may be provided with slits or the like, or a plate material such as a punching metal having a large number of through holes may be provided. good. Further, the material of the wave-proof panel 11 is not limited to metal, but may be made of reinforced plastic or a lightweight concrete plate.

Next, a method of constructing the wave-proof structure of the pile support structure 1 as described above will be described with reference to FIGS. 2, 8 to 13. The same components as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

First, wave-proof panels 11, 11 ... Of a predetermined width and height are manufactured at a factory or the like, and the wave-proof panels 11, 11 ... Are transported to a construction site.

Next, a plurality of wave-proof panels 11, 11 ... Carried in on or near the floor slab 7 of the pile support structure 1 are connected to form a plurality of panel bodies 12 having a desired width and height. ..

Next, as shown in FIGS. 8 to 11, the upper fixing member 9 is attached to the outer surface of the beam portion 6 of the superstructure 4.

In the attachment work of the upper fixing member 9, first, as shown in FIG. 8, the female screw anchor 27 is embedded in the beam side surface portion of the superstructure 4.

Next, the lifting means 50 is attached at a predetermined position under the floor slab 7.

The lifting means 50 uses a simple lifting device capable of feeding and hoisting a lifting member 50a made of a drawn wire such as a chain block or a chain, and the upper end portion can be rotated to the lower surface of the floor slab 7. Fix it.

Next, as shown in FIG. 9, suspension wires 51 and 51 are attached to the upper suspension member 22 and the lower suspension member (support shaft members 23, 23 ... In this embodiment) of the upper fixing member 9, and the upper fixing member 9 is attached. The upper fixing member 9 is lifted by a crane or the like (not shown) installed on the floor slab 7 with the front side facing upward.

Then, the lifted upper fixing member 9 is moved to the vicinity of the offshore edge of the floor slab 7, and the hanging member 50a drawn out from the lifting means 50 by a predetermined length is attached to the upper hanging tool 22.

Next, when the suspension wires 51 and 51 are extended and the upper fixing member 9 is lowered to a predetermined position, the suspension member 50a becomes tense, and when the suspension wires 51 and 51 are further extended, the suspension wires 51 and 51 are extended. As it slackens, the upper fixing member 9 rotates toward the pile columnar bodies 3, 3 ... Side via the suspension member 50a, and as shown in FIG. 10, the upper fixing member 9 is suspended by the lifting means 50.

From this state, the lifting means 50 is operated, the lifting member 50a is wound up, and the upper fixing member 9 is raised to a predetermined position, that is, the bolt insertion hole of the fixing plate 21a reaches the position of the female screw anchor 27.

Then, the bolt 25 is screwed into the female screw anchor 27 via the fixing plate 21a to fix the fixing portions 21 and 21, and the upper fixing member 9 is fixed to the side surface of the beam portion 6 of the superstructure 4. When the fixing of the upper fixing member 9 is completed, the lifting means 50 is removed.

Next, as shown in FIG. 11, the bracket 52 is temporarily installed at a predetermined height of the pile columnar bodies 3, 3 ... Fix it to the outer surface by welding or the like.

Then, when the support member 30 is fixed to each of the pile columnar bodies 3, 3 ..., The beam-shaped lower horizontal member 31 made of H-shaped steel is hung by a crane or the like installed on the deck 7, and each support member 30 is hung. It is fixed by bolts or welding, and is supported in a state of being bridged between the support members 30 and 30.

Next, as shown in FIG. 12, the suspension wires 53, 53 are attached to the assembled panel body 12, and the bearings are fixed to the upper ends of the panel bodies 12, 12 ... By a crane or the like installed on the floor slab 7. The panel body 12 is lifted with the members 42 and 42 facing the beam portion 6 side and the front side facing upward.

Then, the lifted panel body 12 is moved to the outside from the outer edge of the floor slab 7, lowered from that position to the height of the upper fixing member 9, and the panel body 12 is moved toward the upper fixing member 9 at that position.

Next, while adjusting the position, the bearing members 42, 42 are fitted on both sides of the support shaft members 23, 23 ... Protruding from the front surface of the upper fixing member 9, and rotated into the shaft insertion holes 42a, 23a, 42a. The rotating shaft 44 is passed through the bearing members 42, 42 and the support shaft member 23 through the bolt which is the shaft 44, and screwed into the nut.

As a result, each panel body 12 is supported by the upper fixing member 9 in a rotatably state via the rotation shaft 44 (bolt).

The installation preparation work of the panel body 12 can be performed on the water, and the work can be easily proceeded.

Then, when the suspension wire 53 is fed out from the panel body 12 in this state, as shown in FIG. 13, the panel body 12 rotates toward the pile column bodies 3, 3 ... Side via the rotation shaft 44, and the panel body 12 The lower portion moves toward the lower fixing member 10.

Next, as shown in FIG. 2, the mounting member 43 is fixed to the lower horizontal member 31 with bolts 54, and the lower end side of the panel body 12 is fixed to the lower horizontal member 31.

Then, when the lower portion of the panel body 12 is fixed, the nut screwed into the bolt forming the rotating shaft 44 is tightened, and both bearing members 42, 42 and the support shaft members 23, 23 ... Are firmly fastened. , The upper end of the panel body 12 is fixed to the upper fixing member 9.

This series of operations is repeated for each panel body 12, and each panel body 12 is held offshore of the pile support structure, and the wave barrier 8 is constructed. Further, when the slit 55 is provided in the wave barrier 8, the slit 55 can be formed by not installing or removing the panel body 12 at the desired location.

When removing each panel body 12, such as when the panel body 12 is damaged due to aged deterioration or the like, the superstructure 4 is carried out by performing the procedure opposite to the installation work of the panel body 12 described above. It can be easily removed without removal or destruction.

With the wave-proof structure of the pile support structure configured in this way, most of the mounting work of the upper fixing member 9 and the mounting work of the panel body 12 can be performed on the water, and the work can be efficiently performed.

Further, the wave-proof structure of this pile support structure can be attached by using a crane in which the upper fixing member 9, the lower fixing member 10 and the panel body 12 are installed on the floor slab 7, and the hoisting machine ship or the like is not used. Can be constructed efficiently.

In the above-described embodiment, an example in which the lower end is a transparent wave barrier 8 located at a predetermined depth in water has been described, but the wave barrier 8 may have a mode in which the lower end reaches the bottom of the water. good.

1 Pile support structure 2 Water bottom 3 Pile columnar body 4 Superstructure 5 Joint part 6 Beam part 7 Floor slab 8 Wave-proof wall 9 Upper fixing member 10 Lower fixing member 11 Wave-proof panel 12 Panel body 20 Upper horizontal member 21 Fixed Part 22 Upper hanging tool 23 Supporting shaft member 24 Notch part 25 Bolt 26 Bolt insertion hole 27 Female screw anchor 30 Support member 31 Lower horizontal member 32 Bolt insertion hole 40 Frame part 41 Panel body 42 Bearing member 43 Mounting member 44 Rotating shaft 45 Nut 46 Bolt insertion hole 50 Lifting means 51 Hanging wire 52 Bracket 53 Hanging wire 54 Bolt

Claims (6)

In the wave-proof structure of a pile support structure in which a wave-proof wall is held by a pile support structure in which a superstructure is joined to the head of a pile column.
A panel body including an upper fixing member fixed to the superstructure, a lower fixing member fixed to the pile columnar body, and a wave-proof panel formed to one or a plurality of predetermined widths and heights. ,
The upper end portion of the panel body is fixed to the upper fixing member, the lower portion of the panel body is fixed to the lower fixing member, and the wave barrier having an arbitrary width and height is formed. Wave-proof structure of the characteristic pile support structure. The pile support according to claim 1, wherein the wave-proof panel includes a bearing member installed at the upper end, and the bearing member is fixed to a support shaft member supported by the upper fixing member via a rotation shaft. Wave-proof structure of the structure. The wave-proof structure of a pile support structure according to claim 1 or 2, wherein slits are formed between the panel bodies arranged at intervals in the lateral direction. In the method of constructing a wave-proof structure of a pile support structure in which a wave-proof wall is held by a pile support structure in which a superstructure is joined to the head of a pile column.
A panel body is formed by wave-proof panels formed to one or a plurality of predetermined widths and heights, and the upper end portion of the panel body is fixed to an upper fixing member fixed to the superstructure and under the panel body. A method for constructing a wave-proof structure of a pile support structure, which comprises fixing a side portion to a lower fixing member fixed to the pile column to form the wave-proof wall having an arbitrary width and height. A bearing member is provided at the upper end of the panel body, the panel body is moved toward the upper fixing member in a state of being lifted with the surface facing upward, and the bearing member is supported by the upper fixing member. After fixing to the shaft member via the rotation shaft, the lower portion of the panel body is rotated toward the lower fixing member side, and the lower portion of the panel body is fixed to the lower fixing member. The wave-proof structure construction method for a pile support structure according to claim 4, which is characterized. An upper hanger and a lower hanger are provided above and below the front side of the upper fixing member, and a lifting means is provided on the lower surface of the floor slab of the superstructure so that the front side faces upward. The upper and lower side fixing members are lifted, and the hanging member unwound from the lifting means is attached to the upper hanging tool. The wave-proof structure construction method for a pile support structure according to claim 4 or 5, wherein the upper fixing member is fixed to the superstructure after waiting to a predetermined position.

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