JPH0611974B2 - Wave-dissipating structure quay - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wave-dissipating structure quay that uses an existing quay that uses steel sheet piles for earth retaining and has a wave-dissipating function.

[Prior Art] Conventionally, steel sheet piles have been used as earth retaining walls for quays on coastlines, etc. due to their relatively simple construction equipment and low construction costs, and are convenient for blocking waves or for docking vessels. Therefore, the upright type is often used.

[Problems to be Solved by the Invention] By the way, the steel sheet pile used for the conventional quay is easily made of steel and therefore easily corroded, or needs to be improved to be a new quay because it has deteriorated over the years. Is innate.

Also, it is desirable that the quay as the mooring quay has small reflected waves, but the upright quay does not have the wave-dissipating function.

Therefore, as a method of improving the quay of the steel sheet pile, a new quay wall is formed by hitting a new steel sheet pile on the front surface of the old steel sheet pile, or a cuboid caisson is installed in front of the original quay wall. Methods such as landfilling the back were adopted.

However, even with the new steel sheet pile, it still remains corrosive, and since it is an upright type, it does not have a wave-dissipating function, and even if the method of installing a rectangular parallelepiped caisson cannot be expected to have a wave-dissipating function, it cannot be expected as a mooring pier It wasn't very ideal.

In addition, both methods have a problem in that the front sea area is widely occupied and the construction cost becomes large and the construction cost increases during the construction.

In view of the above circumstances, the present invention has an excellent wave-dissipating function, is simple in construction, and can be constructed at low cost when improving a quay using a steel sheet pile that has been corroded, etc. It is intended to provide a quay having a wave structure.

[Means for Solving the Problems] The wave-dissipating structure quay claimed in claim 1 has a sea wall side front surface of the quay constructed by using a steel sheet pile for the earth retaining wall. , Annular blocks are laminated, the blocks are alternately arranged in a staggered manner in a direction parallel to the water surface, and stacked alternately in the vertical direction of the water surface, between the steel sheet pile and the block. Is characterized in that in a wave-dissipating structure quay formed by placing packed concrete, a groove is formed in at least one of vertically stacked blocks to accommodate a part of the other block.

The wave-dissipating structure quay according to claim 2, wherein an annular block is laminated on the sea-side front surface of the steel sheet pile of the quay constructed by using a steel sheet pile for the earth retaining wall, The blocks are arranged alternately in a zigzag pattern in a direction parallel to the water surface, and are stacked alternately in the vertical direction of the water surface. Between the steel sheet pile and the block, a filling concrete is placed. In the water-dissipating structure quay, a reinforcing column is erected by abutting the inner peripheral surfaces of a plurality of vertically stacked blocks and penetrating to the seabed. Is provided with a connecting member for connecting to.

[Operation] According to the wave-dissipating structure quay described in claims 1 and 2 of the present invention, the circles are alternately arranged in a staggered manner and are alternately stacked in the vertical direction of the water surface. The upper and lower gaps between the annular blocks convert the circular motion of seawater into a horizontal direction on the sea surface for rectification, and the gaps between the blocks in the left, right, front, and back disturb the traveling direction of the waves, and these waves mutually Interfering reduces the wave energy.

Further, when a wave enters the inside of the annular block, a vortex is formed along the inner surface of the block, and the mutual energy between the vortex and the wave also reduces the energy of the wave. As a result, the wave height near the quay can be reduced.

Further, since the annular blocks previously manufactured on land in advance can be installed by sequentially stacking them from below, not only a large work area is not required, but also the construction is simple and the construction cost is low.

Also, since it does not corrode, it has excellent durability.

Further, according to the wave-dissipating structure quay described in claim 1, a plurality of blocks are vertically stacked by accommodating a part of the other block in the groove formed in the one block. Therefore, as a result of positioning the upper and lower blocks by the groove, the workability of the stacking work can be improved, and as a result of the blocks located above and below being engaged via the groove, It is possible to prevent collapse of the laminated blocks and improve durability.

Further, according to the wave-dissipating structure quay described in claim 2, the pillars for reinforcement are erected by abutting the inner peripheral surfaces of a plurality of vertically stacked blocks and penetrating the seabed, and Since a connecting member that connects these pillars and the steel sheet pile to each other is provided between the pillars and the steel sheet pile, the synergistic effect of the pillars and the connecting members can prevent the collapse of the block and enhance the durability. it can.

[Embodiment] An embodiment of the wave-dissipating structure quay according to the present invention will be described below with reference to FIGS. 1 to 4. Reference numeral 1 in the figure is a steel sheet pile that has been driven into the quay as an earth retaining wall.

A block wall 3 is constructed on the front surface of the steel sheet pile 1 on the sea area side, on an upper surface of a foundation rubble 2 laid on the seabed G portion.

In the block wall 3, concrete circular blocks 4, 4 ... As shown in FIGS. 1 and 2 are alternately arranged in a staggered manner in a direction parallel to the water surface W, Furthermore, it is also configured to be stacked alternately in the vertical direction.

The blocks 4 are connected to each other by fixing means 5 provided in the blocks 4 as shown in FIG.

The fixing means 5 is configured by fitting a groove 6 provided on the upper surface 4 a of the block 4 into a lower portion of another block 4 placed on the upper portion of the block 4.

On the inner water surface side of each block 4 facing the steel sheet pile 1 side, an H-shaped steel (corresponding to a pillar of the present invention) 7 erected on the seabed G is provided.
Are pierced and built along the inner surface of the block.

Further, as shown in FIG.
Form plate 8 attached in contact with the inner side surface of is attached by welding or bolts. Further, said H-shaped steel 7 is a bolt (corresponding to a connecting member of the present invention) 9 attached to this H-shaped steel 7. Is welded and fixed to the steel sheet pile 1.

Further, a filling concrete 10 is placed between the steel sheet pile 1 and the form plate 8, and a space between the steel sheet pile 1 and the block wall 3 is filled and fixed with the filling concrete 10. There is.

In addition, concrete is cast from the vicinity of the water surface W line of the block wall 3 to form an upper concrete 11, and the water surface W side of the upper concrete 11 is slightly projected to the water surface W side.

Next, a method of constructing the wave-dissipating structure quay wall according to the present invention will be described.

First, rubble stones are built on the ground of the seabed G in front of the steel sheet pile 1 on which this wave-dissipating structure quay is installed, and a rubble stone 2 is constructed.
In order to improve the sitting of the block 4 stacked above,
On the upper surface of the foundation rubble 2, a base with old rails is installed.

Next, the annular blocks 4, 4 ... Preliminarily manufactured on land are alternately arranged in a staggered manner in a direction parallel to the water surface W on the base, and also in a vertical direction. It will be stacked and configured. In this case, each block 4 fits the groove 6 provided on the upper surface 4 a of each block 4 with the lower part of another block 4 placed on the upper part of this block 4,
Sequentially pile up to almost the height of steel sheet pile 1 and block wall 3
Build up.

Next, the H-section steel 7 is built from above along the inner side surface of the block 4 on the steel sheet pile 1 side, is erected on the foundation rubble 2, and one end of the bolt 9 attached to the H-section steel 7 is attached to the steel sheet pile 1
Weld to and fix.

Further, inside the block 4, the mold plate 8 is attached to the H-shaped steel 7 by welding or bolts.

Then, the concrete 10 is placed between the steel sheet pile 1 and the formwork plate 8.
To place. In this case, it is desirable that the concrete 10 be launched with sufficient time so as not to apply pressure to the form plate 8.

Further, the upper concrete 11 is constructed by placing a reinforcing bar and a formwork on the entire upper part of the stacked blocks 4, 4, ... The upper concrete 11 is formed by slightly projecting to the water surface W side.

The construction of the wave-dissipating structure quay is completed by the above construction.

According to the wave-dissipating structure quay of the above-mentioned embodiment, since the block 4 preliminarily manufactured on land may be laminated in front of the original quay, a large area for construction work is not required, and the original quay is not used. Since the steel sheet pile 1 on the quay can be used and the construction is simple, the construction cost can be reduced.

Further, since the blocks 4 are connected to each other by the fixing means 5, the blocks 4 are prevented from collapsing, the block wall 3 is excellent in stability, and the block 4 on the steel sheet pile side has the H-shaped steel 7 and the bolts 9. Is fixed to the steel sheet pile 1 via and the form plate 8 on the inner surface side of the block 4 is the H-shaped steel 7
Since it is fixed to the block wall 3 and the steel sheet pile 1 is filled with the filling concrete 10, it is formed integrally with the original quay wall, the collapse of the block 4 is prevented, and the entire block wall 3 is also formed. Extremely excellent in strength.

Further, since the outer surface of the wave-dissipating structure quay is composed of blocks, the progress of corrosion of the steel sheet pile 1 is prevented, and the new quay is also completely durable and has no fear of corrosion.

Also, in terms of the wave canceling function, the upper and lower blocks 4,
The gap between the four transforms the circular motion of the seawater into the horizontal direction of the water surface W for rectification, and the gap between the left and right blocks 4 and 4 disturbs the traveling direction of the wave. Interfering with each other reduces the wave energy. Further, when a wave enters the inside of the annular shape of the block 4, a vortex is formed along the inner surface of the block 4, and mutual energy between the vortex and the wave also reduces the energy of the wave.

As a result, the wave-dissipating structure quay of the above-described embodiment can be expected to have a sufficient wave-dissipating effect even in an area with high waves, and is extremely suitable as a mooring quay.

By the way, in the area where the water depth is 8m and the wave height is 1.0m,
The blocks 4 with a diameter of 1.2 m are arranged in three rows, the distance between the center points of the blocks 4 is 1.8 m, and the height of the block wall 3 is 0.75.
As a result of experimenting under the condition of m, a good result that the wave reflectance is less than 0.35 was obtained.

Further, since the block wall 3 is composed of the ring-shaped block 4, it is extremely easy to support the upper concrete 11.

[Effects of the Invention] As described above, the wave-dissipating structure quay described in claim 1 is provided on the sea-side front surface of the steel sheet pile of the quay constructed by using the steel sheet pile for the earth retaining wall. The annular blocks are laminated, the blocks are arranged in a direction parallel to the water surface and alternately in a staggered manner, and the blocks are alternately stacked in the vertical direction of the water surface, and the steel sheet pile and the block are In between, in a wave-dissipating structure quay made by placing packed concrete, at least one of the blocks stacked vertically is formed with a groove in which a part of the other block is housed. Therefore, it has the following effects.

That is, the original steel sheet pile can be used, a large work area is not required in the construction work for stacking blocks, and the work is simple, so the construction cost is low.

Also, due to the gap between the blocks stacked vertically,
The circular motion of seawater is converted into a horizontal direction on the water surface W for rectification, and the gap between the left and right and front and rear blocks disturbs the traveling direction of the waves, and the waves interfere with each other to reduce the energy of the waves. Can be made. Further, when a wave enters the inside of the annular block, a vortex is formed along the inner surface of the block, and the mutual energy between the vortex and the wave can reduce the energy of the wave. As a result, a very good wave-dissipating effect is obtained and it is also very suitable as a mooring berth.

In addition, since the filling concrete is placed between the steel sheet pile and the block, the progress of corrosion of the steel sheet pile is prevented, and this wave-dissipating structure quay is composed of blocks on the outer surface. It is also excellent in durability.

Further, by accommodating a part of the other block in the groove formed in the one block, it is possible to stack a plurality of blocks on top of each other, so that the groove positions the upper and lower blocks. , The workability of the stacking work can be improved, and further, since the blocks located above and below are engaged through the groove, the stacked blocks can be prevented from collapsing and the durability can be improved. Produce the effect of.

Next, the wave-dissipating structure quay described in claim 2
An annular block is laminated on the sea-side front surface of the steel sheet pile of the quay constructed using steel sheet piles for the earth retaining wall, and the blocks are alternately arranged in a staggered pattern in a direction parallel to the water surface. While being stacked alternately in the vertical direction of the water surface, between the steel sheet pile and the block, in the wave-dissipating structure quay that is filled with filling concrete,
Reinforcing columns are erected to penetrate the bottom of the sea by contacting the inner peripheral surfaces of a plurality of vertically stacked blocks, and a connecting member that connects these columns to each other is provided between the columns and the steel sheet pile. Therefore, while the same effect as in claim 1 is obtained, the synergistic effect of the column and the connecting member can prevent collapse of the block and enhance durability.

[Brief description of drawings]

1 to 4 show an embodiment of a wave-dissipating structure quay according to the present invention. FIG. 1 is a side view, FIG. 2 is a plan view,
FIG. 3 is a main part view showing the fixing means, and FIG. 4 is a main part view showing a connected state of the block and the steel sheet pile. 1 ... Steel sheet pile, 4 ... Block, 7 ... H type steel (pillar),
9 ... Bolt (connecting member), 10 ... Filling concrete.

Claims (2)

[Claims] 1. A ring-shaped block is laminated on the sea-side front surface of the steel sheet pile of the quay constructed by using steel sheet pile for the earth retaining wall, and the block is in a direction parallel to the water surface and in a staggered pattern. And alternately stacked in the vertical direction of the water surface, between the steel sheet pile and the block, in the wave-dissipating structure quay that is filled with filling concrete, stacked vertically A wave-dissipating structure quay, wherein a groove for accommodating a part of the other block is formed in at least one of the blocks. 2. An annular block is laminated on the sea-front side of the steel sheet pile of the quay constructed by using a steel sheet pile for the earth retaining wall, and the block is staggered in the direction parallel to the water surface. And alternately stacked in the vertical direction of the water surface, between the steel sheet pile and the block, in the wave-dissipating structure quay that is filled with filling concrete, stacked vertically Reinforcing pillars are erected to penetrate the seabed by abutting the inner peripheral surfaces of the plurality of blocks, and a connecting member is provided between the pillars and the steel sheet pile to mutually connect them. Wave-dissipating structure quay characterized by.