JPS6224566B2 - - Google Patents

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to a wave breakwater.

For our country, which is surrounded by the sea on all sides, ports play an extremely important role. In order for a port to fully perform its functions, it is necessary to construct a breakwater to block waves from the open sea and ensure a calm sea area. By the way, the impermeable upright breakwaters made of caissons and the like that have been constructed in the past often have problems such as large reflection of waves in front of the breakwaters and contamination due to accumulation of seawater inside the breakwaters. In order to solve these problems, many wave-dissipating breakwaters have been constructed as permeable breakwaters. For example, a wave-dissipating levee is constructed by forming a flat ground, ie, a mound, on the seabed, and installing a series of box-shaped unitized permeable levee bodies on this mound. However, this method requires the formation of a mound, making it difficult to construct in deep waters and resulting in extremely high costs.Furthermore, the unitized levee body can be simply placed on the mound. Because of this, there were disadvantages such as uneven settlement, inclination, and lateral movement caused by waves. There are also wave-dissipating banks constructed by piling up wave-breaking blocks, but this method suffers from significant uneven settling, inclination, and lateral movement due to waves.

The present invention was made based on the above circumstances, and its purpose is to drive a large number of pillars into the seabed ground, insert concrete floor plates with penetration holes into these pillars, and separate the seabed from the seabed. A large number of wave-breaking blocks are installed above and below the water surface in the space surrounded by these floor plates to provide water permeability and to reduce waves. By adopting a loading structure, the present invention aims to provide a wave-dissipating levee that can eliminate all of the drawbacks of the conventional ones.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a plan view showing a part of the wave-dissipating levee, and FIG. 2 is a front view thereof. A large number of pile-shaped pillars (hereinafter referred to as piles) 2 are driven from the seabed ground 1 to above the water surface at predetermined intervals, and these piles 2 are as shown in Figure 1. They are arranged so as to constitute a space 3 having an elongated rectangular plane as a whole. A bottom floor plate 4 is fixed to the lower part of these piles 2 so as to be at the same level as the seabed ground 1. In other words, the bottom floor plate 4 has an elongated rectangular shape corresponding to the planar shape of the space 3, and has an insertion hole 5 formed at its periphery. After fixing it, insert the stake 2... into the insertion hole 5...
By inserting ... and driving the pile 2 ... using this as a guide, and then injecting mortar etc. between the insertion hole 5 ... and the pile 2 ..., the pile 2 ... is attached to the floor plate 4. It is fixed. And the above pile 2
. . ., a first auxiliary pipe body 6 is mounted on the bottom floor plate 4.
. . ., the intermediate floor plate 7, the second auxiliary pipe body 8, etc. are fitted in this order. The intermediate floor plate 7 is constructed in substantially the same manner as the bottom floor plate 4, and has insertion holes 9 formed at its peripheral edge so that the piles 2 can be inserted thereinto. The first auxiliary tubes 6 are for supporting the intermediate floor plate 7 at a predetermined height below the water surface, away from the seabed ground 1. Then, the upper part of the pile 2... or the second auxiliary pipe body 8...
A frame material 10... is hung horizontally. In the space 3 surrounded by the piles 2 . Loaded and filled over the course of several years. These concrete blocks 11...
The weight of... is supported by the intermediate floor plate 7, and is prevented from moving or falling against the horizontal force of waves by the piles 2... and the frame material 10. The upper end of the pile 2... protrudes from the second auxiliary pipe body 8...
An upper floor plate 12 is fixed to this upper end. This upper floor plate 12 has the same shape as the intermediate floor plate 7 and has fixing holes 13 formed in its peripheral edge.By inserting the fixing holes 13 into the upper ends of the piles 2... It is fixed to the stake 2... The weight of this upper floor plate 12 is the weight of the second auxiliary pipe body 8
It has come to be supported by... This upper floor plate 12 becomes a passage on the upper surface of the wave-dissipating bank.

Next, another example of the construction method of the wave-dissipating levee having the above-mentioned structure, in which the pile driving method is changed, will be explained with reference to FIG. 3.

First, as shown in FIG. 3a, piles 2 are driven into the seabed ground 1 at predetermined intervals by a pile driving boat 14. Next, as shown in FIG. 3b, the bottom floor plate 4 is hoisted up by the piling boat 14, inserted into the piles 2, and lowered to the bottom, and an adjustment material is interposed in the steps of each pile 2. Install it horizontally and fix it at the position of seabed ground 1. Next, as shown in FIG. 3c, the first auxiliary tubes 6 are fitted into the piles 2, and further, as shown in FIG. 3d, the intermediate floor plate 7 is fitted. Next, as shown in FIG. 3e, the second auxiliary tube 8 is fitted into the stake 2, and the frame 10 is attached to the top of the second auxiliary tube 8 or the stake 2. Next, as shown in Fig. 3f, the concrete block 11...
... are stacked on the middle floor plate 7, and then the upper floor plate 1
Fix 2 to stake 2... Since the upper floor plate 12 is above the water surface, it can also be made of cast-in-place concrete by means of formwork supported from the lower intermediate floor plate 7 and the frame 10.

In the case of a wave-dissipating levee having such a configuration, pile 2
. . . waves are broken by concrete blocks 11 . . . Piles 2 . It becomes a strong structure. Also,
Since the structure is such that the trench 2 is cast, it can be carried out even on the deep seabed, and since there is no need to form a mound, the construction is simple and inexpensive.
Since the piles 2 are firmly fixed to the seabed ground 1 by driving, it is possible to prevent the wave-dissipating levee from sinking, tilting, side-slipping, etc. Furthermore, since the bottom floor plate 4 is made to cover the seabed ground 1, scour around the piles 2 can be prevented, and the state in which the piles 2 are driven into the seabed ground 1 can be ensured. Furthermore, since the concrete blocks 11 are supported by the bottom floor plate 4 via the intermediate floor plate 7 and the first auxiliary pipe 6, the concrete blocks 11 themselves may sink. It can prevent tilting, etc. In addition, these concrete blocks 11... are stacked on the intermediate floor plate 7 located at a predetermined height from the seabed ground 1, and are designed to efficiently break waves over the top and bottom of the seabed. Since there is no need to pack these concrete blocks 11 between the concrete blocks 11 and the intermediate floor plate 7, material costs can be reduced, and
Since the concrete blocks 11 are supported so as to have water permeability, and a seawater communication section is formed between the submarine ground 1 and the intermediate floor plate 7, seawater permeation is facilitated.

Note that the present invention is not limited to the above embodiments,
Various embodiments are possible. For example, the auxiliary pipe body 6
can be directly supported by a step formed on the pile 2. Furthermore, the wave breaking block may be made of not only concrete blocks but also lump stones.

As explained above, the present invention involves driving pillars into the seabed ground, connecting these pillars with a floor plate on the seabed and an intermediate floor plate, and in addition, in a space surrounded by these pillars, a plurality of pillars are placed on the intermediate floor plate. Since the wave breaking blocks are loaded so as to have water permeability, it is possible to construct a strong wave breaking bank that is effective in wave breaking.
In addition, since it is a pile driving method, it can be constructed in deep sea areas and can be constructed at low cost, and it can prevent sinking, inclination, and lateral movement of the wave-dissipating levee. moreover,
Since the breakwater is water-permeable, the reflection of waves at the front surface is small, and seawater contamination within the breakwater can be prevented. Furthermore, since the bottom floor plate is installed on the seabed, scouring around the column can be prevented.
It is possible to ensure that the column is well driven into the seabed ground.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Figure 1 is a plan view showing a part of the wave-dissipating levee, Figure 2 is a front view of the same, and Figures 3 a to 3-f show the construction method of the wave-dissipating levee in order. FIG. 1... Seabed ground, 2... Pile (column), 3... Space, 4... Bottom floor plate, 7... Intermediate floor plate, 11...
...Concrete block (breaking wave block), 6,
8...Auxiliary pipe body.

Claims (1)

[Claims] 1. A large number of pillars that are cast into the seabed ground and whose upper ends reach above the water surface, a bottom floor plate that is fitted onto these pillars and installed on the seabed, and an auxiliary pipe that is inserted into the pillars on the floor plate. , an intermediate floor plate that is supported by these auxiliary tubes, fitted into columns and spanned near the water surface away from the seabed, and a space surrounded by these columns from below the water surface to above the water surface. 1. A wave-dissipating levee comprising a plurality of wave-breaking blocks supported in a water-permeable manner by a floor plate.