JP3416524B2 - Soft ground submerged submerged embankment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a submerged dike installed on the seabed of soft ground.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional general structure of a submerged embankment. A foundation rubble mound 15 is built on an offshore seabed G, and a deformed concrete block 14 is mounted on this mound 15. By stacking, a submerged dike is built below the sea surface S. However, the deformed concrete block 14 forming the submerged dike is generally made of normal concrete,
It is not suitable for marine organisms such as algae, kelp, and shellfish to attach and reproduce, resulting in the destruction of the marine environment.

Further, in the seabed having a soft ground layer such as a harbor sea area, when constructing a submerged dike of a conventional structure, the soft ground layer on the seabed is removed and the foundation rubble mound 15 is placed on the rock or hard layer. There is a problem that the construction work of the submerged embankment is almost offshore or undersea because the seawater is polluted and the environment is deteriorated by the removal work.

[0004]

DISCLOSURE OF THE INVENTION The present invention is intended to solve various problems in the conventional submerged dike as described above, and can be constructed in a short period without deteriorating the environment of the seabed. It is an object to provide a submerged dike for soft ground.

[0005]

In order to solve the above-mentioned problems, a soft ground-bearing submerged dike of the present invention is a combination of a bottom plate along the surface layer of the soft ground on the seabed and a lattice pattern from the bottom surface of the bottom plate. It has a lower structure consisting of a plurality of vertical plates inserted vertically so as to bite into the soft ground and has an outer layer made of porous concrete and supported on the bottom plate. It is characterized by having a breakwater section.

Further, the soft ground bottomed submerged dam of the present invention is characterized in that the outer layer of the submerged breakwater is formed by placing porous concrete on the outer surface of the steel shell.

Further, in the submerged submerged submerged dike of the present invention, the shell of the submerged breakwater is a shell made of ordinary concrete,
It is characterized in that it is integrally configured by a porous concrete formwork installed on the outer surface of the shell with a gap and ordinary concrete placed in the gap.

Further, the soft ground bottoming type submerged dike of the present invention is characterized in that a weight material is packed inside the submerged breakwater.

[0009] In the above-mentioned soft ground landing type submerged dike of the present invention,
The bottom plate that supports the submerged breakwater is seated with adhesive resistance of the bottom plate to the soft ground surface layer of the sea floor, and the bottom plate of the bottom plate is combined in a grid pattern and hung vertically to be inserted into the soft ground of the sea floor. Since it is fixed to the seabed with multiple vertical plates that bite in such a manner, it is not necessary to remove the soft ground layer to expose the rock layer and hard layer as in the past, and this does not cause seawater pollution Therefore, the effect that does not deteriorate the undersea environment can be obtained.

Further, since the bottom plate and the submerged breakwater part on the bottom plate can be manufactured on land, transported to the required water area and hung on the seabed by a crane ship, the effect of shortening the construction period can be achieved. There is.

Further, since the submerged breakwater has an outer layer made of porous concrete, when it is installed in water, marine organisms such as seaweed and shellfish adhere to it and easily propagate, which improves the marine environment. It comes to contribute.

When installing the submerged dike on the seabed, the submerged breakwater and the bottom plate with the vertical plate can be hung on the seabed as a unit, and the bottom plate with the vertical plate is first installed on the seabed. The submerged breakwater may be suspended so as to be supported on the bottom plate.

Further, since the plurality of vertical plates hanging from the bottom plate are combined vertically and horizontally or in the shape of a honeycomb so as to be combined in a grid pattern, the vertical plates are inserted into the soft ground. The bottom plate can be fixed more accurately.

Further, when the outer layer of the submerged breakwater has a structure formed by placing porous concrete on the outer surface of the steel shell, the strength of the shell of the submerged breakwater is the steel shell. The result is that the layer thickness of the porous concrete, which is the outer layer, can be made thin. And
On the surface of this porous concrete, the adhesion and propagation of marine organisms can be sufficiently maintained.

Further, the shell body of the submerged breakwater is integrally constructed by placing a porous concrete formwork on the outer surface of the ordinary concrete shell body with a gap, and placing ordinary concrete in the gap. In this case, the weight of the ordinary concrete shell increases the resistance to wave forces, and the porous concrete wall of the porous concrete formwork may be thin.

Further, when the weight is packed inside the submerged breakwater, the bottom plate supporting the submerged breakwater and the vertical plate hung from the lower surface of the submerged breakwater form the seabed by the weight. Since it is pressed against the soft ground with sufficient force, the submerged breakwater is held more firmly.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an end view showing a soft ground-bearing submerged submerged dike as the first embodiment of the present invention, and FIG. FIG. 3 is an AA arrow view, FIG. 3 is an end view showing a soft ground bottoming type submerged dike as a second embodiment of the present invention, and FIG. 4 is a soft ground bottoming type as a third embodiment of the present invention. It is an end view showing a submerged dike.

First, a soft ground-bearing submerged dike as a first embodiment of the present invention will be described. As shown in FIGS. 1 and 2, a bottom plate 5 made of reinforced concrete along the surface layer of the soft ground of the seabed G is A vertical plate 6 composed of a vertical plate 6a and a horizontal plate 6b made of reinforced concrete, which is vertically provided on the lower surface thereof, is provided so as to be inserted into the soft ground.

A submerged breakwater section 8 is supported on the upper surface of the bottom plate 5 via a pedestal 7. The submerged breakwater section 8 has a steel shell body 1 whose inside is reinforced with a reinforcing material 2. The steel shell 1 is provided with an outer shell 3 which is cast on the outer surface and forms an outer layer made of porous concrete.

In this embodiment, the vertical plates 6a and the horizontal plates 6b as the plurality of vertical plates 6 are combined in a lattice shape, but the plurality of vertical plates are formed in a honeycomb shape or another shape to form a lattice shape. You may.

In this manner, the submerged breakwater section 8 is constructed below the sea surface S. The inside of the submerged breakwater section 8 may be in a state in which seawater can freely flow, or a watertight structure may be provided to the top of the worker. A snorkel that can move in and out may be provided to stand up above the sea level.

Regarding the submerged breakwater 8, as in the second embodiment of the present invention shown in FIG. 3, the steel shell 1 whose inside is reinforced with the reinforcing material 2 and the outer surface of the steel shell 1 are struck. In addition to having the outer shell 3 forming the outer layer made of porous concrete, it may be configured to have rock 13 as a weight material packed therein.

As for the submerged breakwater 8, as in the third embodiment of the present invention shown in FIG. 4, a shell made of ordinary concrete.
After installing the porous concrete formwork 3a with a predetermined gap on the outer surface of 12, the normal concrete 12
Alternatively, a may be cast to form an integral unit.

The wall portion of the porous concrete used for the submerged breakwater 8 in each of the above-mentioned embodiments has innumerable pores inside, and porous concrete (compressive strength) through which seawater or air can easily flow. 100 to 200 kg / cm ² ).

In the soft ground bottomed submerged dam of each of the above-described embodiments, the bottom plate 5 supporting the submerged breakwater 8 is seated on the soft ground surface layer of the seabed G with adhesive resistance. If, bite are vertically from the lower surface of the bottom plate 5 to the soft ground of the sea bottom
Since it is fixed to the seabed by the biting of the vertical plates 6 inserted as described above, it is not necessary to remove the soft ground layer to expose the rock layer and the hard layer as in the conventional case, and this enables seawater It does not cause pollution and has the effect of not deteriorating the undersea environment.

Also, the bottom plate 5 and the submerged breakwater 8 on the bottom plate 5 can be manufactured on land, transported to the required water area, and hung on the seabed by a crane ship, which shortens the construction period. It has an effect.

Further, since the submerged breakwater 8 has the outer shell 3 forming the outer layer made of porous concrete and the formwork 3a made of porous concrete, when placed in water, marine organisms such as seaweed and shellfish are It adheres to it and becomes easy to breed, contributing to the improvement of the marine environment.

When the submerged breakwater is installed on the seabed, the submerged breakwater 8 and the bottom plate 5 with the vertical plate 6 can be hung on the seabed as a unit, and first, the bottom plate 5 with the vertical plate is installed on the seabed. Then, an operation of suspending the submerged breakwater 8 so as to be supported on the bottom plate 5 may be performed.

If a plurality of vertical plates 6 hung from the bottom plate 5 are combined in a grid pattern by combining them vertically or horizontally or in the shape of a honeycomb, the vertical plates 6 can be applied to soft ground. The bottom plate 5 can be fixed more accurately by insertion.

Further, when the outer layer of the submerged breakwater 8 has a structure formed by pouring porous concrete on the outer surface of the steel shell 1, the strength of the outer shell is greatly increased by the steel shell 1. Improved, which makes the outer layer of porous concrete 3
The layer thickness of is small. Then, on the surface of this porous concrete, the marine organisms can be sufficiently maintained and propagated.

In addition, the shell of the submerged breakwater 8 is provided with a porous concrete formwork 3a on the outer surface of the shell 12 made of ordinary concrete with a gap, and the ordinary concrete 12a is placed in the gap. When it is integrally formed, the weight of the ordinary concrete shell body 12 increases the resistance to wave forces, and the porous concrete wall formed by the porous concrete formwork 3a may be thin.

Further, when the rock 13 as a weighting material is packed in the submerged breakwater 8, the bottom plate 5 supporting the submerged breakwater 8 and the vertical plate 6 suspended from the lower surface of the bottom plate 5.
However, since the rock 13 presses it against the soft ground of the seabed G with a sufficient force, the submerged breakwater 8 is held more firmly.

[0033]

As described in detail above, the following effects can be obtained by the soft ground-bearing submerged dike of the present invention. (1) The bottom plate supporting the submerged breakwater is seated with adhesion resistance to the soft ground surface layer of the sea floor, and the bottom surface of the bottom plate is combined in a grid pattern and hung vertically to form a weak sea floor. because it is fixed to the seabed by a plurality of vertical plates which are inserted so as to Maseru write eat into the ground, it is not necessary to remove the conventional soft soil layer as to expose the rock layer and a hard layer, thereby seawater The effect of not causing the pollution of the seawater and not deteriorating the undersea environment is obtained. (2) The bottom plate and the submerged breakwater on the bottom plate can be manufactured on land, transported to the required water area, and hung on the seabed by a crane ship, which has the effect of shortening the construction period. . (3) Since the submerged breakwater has an outer layer made of porous concrete, if it is installed in water, marine organisms such as seaweed and shellfish will attach and proliferate easily, contributing to the improvement of the marine environment. Like (4) When installing this submerged submarine on the seabed, the submerged breakwater and the bottom plate with the vertical plate can be hung on the seabed as a unit, and first, the bottom plate with the vertical plate is installed on the seabed and then The submerged breakwater may be suspended so that it is supported above. (5) A plurality of vertical plates hanging from the bottom plate are combined vertically or horizontally or in a honeycomb shape,
Since they are combined in a grid pattern, the bottom plate can be fixed more accurately by inserting the vertical plate into the soft ground. (6) When the outer layer of the submerged breakwater has a structure formed by placing porous concrete on the outer surface of the steel shell, the strength of the shell of the submerged breakwater depends on the steel shell. This is a significant improvement, which allows the outer layer of porous concrete to be thin. Then, on the surface of this porous concrete, the marine organisms can be sufficiently maintained and propagated. (7) The shell body of the submerged breakwater is constructed integrally by placing a porous concrete formwork on the outer surface of a shell made of ordinary concrete with a gap and placing ordinary concrete in the gap. Then, the weight of the ordinary concrete shell increases the resistance to wave forces, and the porous concrete wall of the porous concrete formwork may be thin. (8) When the weight material is packed inside the submerged breakwater,
Since the bottom plate supporting the submerged breakwater and the vertical plate hung from the bottom surface of the bottom plate are pressed against the soft ground on the seabed with sufficient force by the weight material, the submerged breakwater can be further retained. It will be done firmly.

[Brief description of drawings]

FIG. 1 is an end view showing a soft ground landing type submerged embankment as a first embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is an end view of a submerged breakwater part in a soft ground-bearing bottom submerged submergence as a second embodiment of the present invention.

FIG. 4 is an end view of a submerged breakwater portion of a soft ground-bearing bottom submerged submerged pier according to a third embodiment of the present invention.

FIG. 5 is an end view showing an example of a conventional submerged submerged embankment for soft ground.

[Explanation of symbols]

1 steel shell 2 Reinforcement material 3 Porous concrete outer shell 3a Porous concrete formwork 5 bottom plate 6 vertical plate 6a Vertical plate 6b horizontal plate 7 stand 8 Submerged breakwater 12 Regular concrete shell 12a Regular concrete 13 Rock (weight material) 14 Deformed concrete block 15 Basic rubble mound G seabed S sea level

Continuation of the front page (56) Reference JP-A-10-82028 (JP, A) JP-A-5-17948 (JP, A) JP-B-61-32457 (JP, B2) Utility model registration 2503854 (JP, Y2) ) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02B 3/06

Claims (4)

(57) [Claims] 1. A lower part composed of a bottom plate extending along the surface layer of soft ground on the seabed, and a plurality of vertical plates which are vertically installed by being combined in a grid pattern from the lower surface of the bottom plate and inserted so as to bite into the soft ground. Along with providing a structure, characterized in that it is provided with a submerged breakwater supported on the bottom plate having an outer layer made of porous concrete,
A submerged submerged dike on soft ground. 2. The soft ground-bearing submerged submerged dam according to claim 1, wherein the outer layer of the submerged breakwater is formed by placing porous concrete on the outer surface of the steel shell. It is a submerged submerged dike on soft ground. 3. The soft ground-bearing submerged submerged dam according to claim 1, wherein the shell body of the submerged breakwater is installed with a shell made of normal concrete and a gap between the outer surface of the shell body. A soft ground-bearing submerged embankment characterized by being integrally configured by a porous concrete formwork and ordinary concrete placed in the gap. 4. The soft ground-bearing submerged submerged dam according to any one of claims 1 to 3, wherein:
A soft ground-bearing submerged dike characterized by being filled with weight material.