JP2003253647A - Combined steel sheet pile bank protection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combined steel sheet pile bank protection structure capable of solving a problem on scenery for a long period without impairing the characteristic of the steel sheet pile bank protection superior in its application characteristic and economical efficiency, and exercising superior performance in protecting and keeping ecological system and natural environment as plants and small animals can be grown. <P>SOLUTION: This combined steel sheet pile bank protection structure is constructed by attaching a ceramic flat plate made out of porous sintered body having a coefficient of permeability of 10<SP>-5</SP>-10<SP>0</SP>cm/sec and a volumetric water content of 25% or more, on a front face of a sheet pile wall constructed by driving a number of steel sheet piles in parallel. Living matters can be grown, and a scenery recovering wall for recovering the sheet pile wall is mounted. Preferably, planting prosthesis for growing plants and/or breeding prosthesis for growing small animals are packed in a space formed between the sheet pile wall constructed by using U-shaped steel sheet piles and the scenery recovering wall. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a steel sheet pile revetment constructed by arranging a number of steel sheet piles in parallel for the purpose of reveting the steel sheet piles at the shore of a river or at the coast. The present invention relates to a composite steel sheet pile revetment structure capable of covering the front surface of a sheet pile wall constructed by steel sheet piles and restoring the landscape.

[0002]

2. Description of the Related Art A sheet pile wall constructed by driving a large number of steel sheet piles in parallel is easy to construct and does not require large-scale equipment. It has many features such as that it can cope with the ground condition and can be designed reasonably and economically, that the wall is lightweight and strong, and unlike the heavy-duty structure, the seismic design is easy. Therefore, it is often used for seawall construction and quay construction.

However, in this sheet pile wall, the surface of the steel material is exposed, and red rust peculiar to the steel material is usually generated on the surface, which often impairs the surrounding scenery. Therefore, even in the past, various measures have been taken to restore such a landscape of the sheet pile wall. For example, as shown in FIG. 6, steel sheet piles 1a and 1b are struck to make the sheet pile wall. After building 1, the angle member 11 is horizontally attached to the front in two steps, and the decorative panel 10 is arranged from the front, and the decorative panel 10 is attached.
A decorative panel scenic method for suspending and fixing a hanging metal fitting 12 provided on the angle member 11 on the sheet pile wall 1 side to cover the front surface of the sheet pile wall 1 with a decorative panel 10 to restore the landscape, As shown in FIG. 7, on the front surface of the sheet pile wall 1 constructed by driving the steel sheet piles 1a and 1b, the upper planting container 13a and the lower portion thereof are projected at the height near the water surface. Planting fins 13 consisting of plates (fins) 13b are installed and planting containers 1
In 3a, a plastic net 15 is laid on the expanded metal 14 which constitutes the bottom of the plant, and a planting soil 16 is housed therein. There have been proposed methods for planting fin landscapes, etc., in which plants are bred.

However, in the former makeup panel landscape method, the landscape of the sheet pile wall 1 can be restored to some extent, for example, by selecting a makeup panel 10 having a pattern close to that of a natural rock surface, but the surrounding area of the sheet pile wall 1 can be restored. It is difficult to integrate into the natural landscape, and it becomes difficult to grow plants and small animals in the vicinity of the sheet pile wall 1, which may have a great influence on the ecosystem. Also, in the latter case of the planting fin landscape method, although it is effective in a place where the water level fluctuation is small, it is often not possible to deal with this in a place where the water level fluctuation is relatively large, and the planting container 13a may be dried or submerged for a long time. It is difficult to expect permanent greening, because the plants grown in the plant may die or the planting soil 16 in the planting container 13a may flow out due to a rapid increase in water.

[0005]

Therefore, the present inventors can solve the problem of landscape for a long time without impairing the features of the steel sheet pile revetment which is excellent in workability and economy. , As a result of diligent examination of a steel sheet pile revetment structure capable of growing plants and growing small animals and having excellent performance in protecting and maintaining the ecosystem and natural environment, By constructing a landscape restoration wall with a ceramic flat plate made of a porous sintered body having a predetermined hydraulic conductivity and volumetric water content, not only can the landscape be restored, but also plant growth and small animal growth are possible. And completed the present invention.

Therefore, an object of the present invention is to solve the problem of landscape for a long period of time without deteriorating the characteristics of the steel sheet pile revetment which is excellent in workability and economical efficiency, and further, the growth of plants and small animals can be solved. The purpose of the present invention is to provide a composite steel sheet pile revetment structure that is capable of growing and is excellent in protecting and maintaining the ecosystem and natural environment.

[0007]

That SUMMARY OF THE INVENTION The present invention provides a sheet pile wall constructed a large number of steel sheet piles by Da設in parallel form, permeability 10 ^-5 ~10 ⁰ cm / sec and the volumetric water content 25 Composite steel that is constructed by pasting a ceramic flat plate formed of a porous sintered body of not less than 5% on the front surface of the sheet pile wall, and has a landscape restoration wall that can grow or grow organisms and restore the landscape of the sheet pile wall It is a sheet pile revetment structure.

In the present invention, regarding the steel sheet pile for constructing the sheet pile wall, preferably, a plurality of sheets capable of penetrating the landscape sheet restoration wall from the back side of the constructed sheet pile wall and penetrating the sheet pile wall. This is a water permeable steel sheet pile having a water permeable hole, which makes it possible to more reliably grow plants on the landscape restoration wall. Regarding the type of steel sheet pile, even if it is a U-shaped steel sheet pile that is widely used,
Although it may be a straight-lined steel sheet pile, it is preferably a U-shaped sheet pile capable of constructing an appropriate composite steel sheet pile revetment structure according to the ecosystem and natural environment of the construction site.

That is, when a U-shaped steel sheet pile is used as the steel sheet pile, depending on the ecosystem and the natural environment of the construction site, the space between the sheet pile wall constructed with this U-shaped steel sheet pile and the landscape restoration wall is used. Planting supplementary material capable of growing plants in the formed void and /
Alternatively, it can be filled with a rearing material capable of growing small animals, and, together with the performance of the landscape restoration wall itself, can form an environment for better growth or growth of living things.

For example, in a composite steel sheet pile revetment in a freshwater system where the flow is relatively gentle in a river or the like, a planting supplementary material capable of growing plants in the void formed between the sheet pile wall and the landscape restoration wall. To create an appropriate environment by growing plants.Also, in a composite steel sheet pile revetment in a saltwater system such as a freshwater system or a coast where the flow is relatively vigorous, the above sheet pile wall and landscape restoration wall The space formed between them is divided into upper and lower parts, the lower part is filled with a breeding supplement that can grow small animals, and the upper part is filled with a planting supplement that can grow plants. The boundary may be located above the height of the water surface so that an environment suitable for the growth of small animals is created in the lower part and an environment suitable for the growth of plants is created in the upper part.

Examples of plant-filling materials capable of growing plants used for such purposes include natural soil, soil generated at construction sites, artificial lightweight soil, silt, sand, and mixtures thereof. Further, examples of breeding supplements that can grow small animals include, in addition to the above-mentioned planting supplements, gravel and crushed stone that have a relatively large particle size and can secure a necessary living space, These planting supplements and breeding supplements can be appropriately selected and used according to the surrounding environment in which the composite steel sheet pile revetment is constructed.

Further, in the void portion formed between the sheet pile wall and the landscape restoration wall, a filling material holding member, preferably a water permeable filling material holding member is provided in the lower end opening, and the inside of this void portion is provided. The planting filling material and / or the breeding filling material filled in may be retained in a predetermined area, whereby a desired composite steel sheet pile revetment can be easily obtained even when the water depth on the front side of the sheet pile wall is deep, for example. Can be built.

Further, in the present invention, the ceramic plates used to construct the landscape restoration wall, its permeability is 10 ^-5 ~10 ⁰ cm / sec, preferably 10 ^-4 to 10 ^-1 c
m / sec, and the volumetric water content must be 25% or more, preferably 30 to 40% and formed of a porous sintered body. If permeability is less than 10 ^-5 cm / sec, susceptible to plants root rot water permeability germinated insufficient, on the contrary, when higher than 10 ⁰ cm / sec, the force for holding the moisture is insufficient It becomes easy to dry and the vegetation performance deteriorates. If the volumetric water content is lower than 25%, the vegetation performance will be insufficient, and if it exceeds 40%, the strength will be reduced.

And regarding this ceramic flat plate,
The thickness is preferably 20 to 100 mm, preferably 30 to 80 mm. If the thickness is less than 20 mm, the strength may be insufficient and reinforcement may be required, or it may be easily damaged by the impact of driftwood. In addition, if it is thicker than 100 mm, the weight becomes heavy and the construction cost of the landscape restoration wall becomes high, which is not economical. The size and shape of this ceramic flat plate is not particularly limited, but from the viewpoint of production, construction, transportation, etc., the vertical dimension is usually about 200 to 400 mm and the horizontal dimension is about 400 to 600 mm. A rectangular shape is used.

The ceramic flat plate has a diameter of 10 in consideration of the environment at the construction site of the composite steel sheet pile revetment.
A plurality of through-holes having a size of about 50 mm may be provided, and it is possible to construct a growth environment for a relatively large plant, or to use as a house for small animals or a moving space.

A method for producing such a ceramic flat plate is not particularly limited, but a suitable method is, for example, a clinker ash aggregate (including a granulated material) 45 having a particle diameter of 1.5 to 10.0 mm. 〜80wt%, Porous crystallized glass component 2 consisting of soda-lime glass and hydraulic cement 2
Mixing 0 to 55 wt% with molding water of 10 to 25 wt%,
The obtained mixture is granulated, cured for 20 to 60 minutes, and then filled in a mold of a vibration molding machine to form a molding surface pressure of 5 to 30.
It is molded into a flat plate or block at kg / cm ² , and the molded body is cured and cured again, and then dried to 1000 ~
A method of firing at 1200 ° C (Patent No. 3,158,086), a total amount of coal ash fly ash and clinker ash of 50 to 85 wt%, and a total amount of clay-based hydraulic cement of 15 to 30 wt%, and sintering adjustment A method in which a raw material composition is prepared by mixing 0 to 20 wt% of the material, the obtained raw material composition is molded, dried, and then baked at 1000 to 1200 ° C. (JP-A-9-25,155) A method can be mentioned.

Further, the method for constructing a landscape restoration wall on the front surface of the sheet pile wall using such a ceramic flat plate is not particularly limited, and for example, the surface of the sheet pile wall which has just been constructed and is still in the construction is not limited. When it is not dirty, the ceramic flat plate may be directly adhered to the surface of the sheet pile wall by means of an adhesive or the like, and in the case where red rust or the like has already occurred on the existing sheet pile wall, A flat bar is attached to the front of the sheet pile wall at a predetermined interval in the horizontal direction, and a ceramic flat plate is fixed to this flat bar with an adhesive or a fastener, and further, a steel sheet pile and a landscape restoration wall that compose the sheet pile wall. The metal plate and the ceramic flat plate may be provided with a stopper or the like in advance during the manufacturing thereof.

Here, a case where the planting and / or breeding filling material is filled in the space between the sheet pile wall constructed of U-shaped steel sheet pile and the landscape restoration wall, and the landscape restoration wall is constructed. In the case where the through hole is provided in the ceramic flat plate to be used, preferably, a suction preventing net is arranged at least on the back side of the through hole of the ceramic flat plate for constructing the landscape restoration wall, and the planting filling material and // Alternatively, the breeding supplementary material is prevented from being sucked out through the through hole.

Since the composite steel sheet pile revetment structure of the present invention is composed of a sheet pile wall and a landscape restoration wall which is constructed in front of the sheet pile and has a predetermined hydraulic conductivity and volume moisture content, the landscape is simply restored. However, based on its hydraulic conductivity and volumetric water content, it is possible to establish moss survival, plant growth, microbial growth and, in some cases, small animal growth on the landscape restoration wall.

Especially, by using a water permeable steel sheet pile or a U-shaped steel sheet pile as the steel sheet pile for constructing the sheet pile wall, it is possible to create an environment suitable for further plant growth and small animal growth. Creating a superior environment for plant growth and small animal growth when planting and / or rearing filling materials are filled in the space between the sheet pile wall constructed with shaped steel sheet pile and the landscape restoration wall You can

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the composite steel sheet pile revetment structure of the present invention will be specifically described below with reference to the embodiments shown in the accompanying drawings.

Embodiment 1 FIGS. 1 to 4 show a composite steel sheet pile revetment structure in a river R according to Embodiment 1 of the present invention. The composite steel sheet pile revetment structure of this Example 1 is a sheet pile wall 1 constructed by arranging a large number of U-shaped steel sheet piles 1a and 1b in parallel, and a water permeability coefficient of 5 × 10 ⁻² cm / s.
ec and a porous sintered body with a volumetric water content of 32%
Ceramic flat plate 2a with a size of 00 mm x 250 mm x 50 mm
The landscape restoration wall 2 built on the entire surface of the sheet pile wall 1 by
And filled in the void formed between the sheet pile wall 1 and the landscape restoration wall 2 based on the shape of the U-shaped steel sheet piles 1a, 1b,
It is composed of a planting supplement 3a made of natural soil on which plants can grow.

In the first embodiment, as shown in FIGS. 2 and 3, each U-shaped steel sheet pile 1a, 1b constituting the sheet pile wall 1 is provided with a large number of water permeation holes 4 having a diameter of 28 mmφ in the horizontal direction. 14
It is opened at intervals of 0 mm and 200 mm in the vertical direction, and through these water-permeable holes 4, from the land G side on the back side of the sheet pile wall 1 to its front side, and from the river R on the front side to the land G on the back side.
Water is supposed to penetrate into each side, and further,
At the lower end opening of the void formed between the sheet pile wall 1 and the landscape restoration wall 2, as shown in FIG. 2, for holding the planting restoration material 3a filled in the void. The filling material holding member 5 made of a steel plate is attached by welding, and a large number of small holes 5a are provided in the filling material holding member 5 so that water can permeate.

Further, in the first embodiment, as shown in FIG. 4, the landscape restoration wall 2 is provided with a large number of steel plate flat bars 6 on the sheet pile wall 1 side in a vertical direction by means such as welding. It is constructed by attaching the ceramic flat plates 2a to the flat bar 6 horizontally with a space between them and fixing them to the flat bar 6 with a resin adhesive such as an epoxy resin adhesive.

Therefore, according to the composite steel sheet pile revetment structure of Example 1, the scenic restoration wall 2 constructed with the ceramic flat plate 2a adheres at the construction site based on the excellent vegetation performance of the ceramic flat plate 2a. In addition to being able to grow the plant of the seeds that have been planted, especially in the region where there is a void filled with the planting filling material 3a made of natural soil, the plant is
3a can grow roots and grows up big, and the sheet pile wall 1
Not only can the landscape be restored by the landscape restoration wall 2 of the ceramic flat plate 2a, but a natural state that matches the surrounding ecosystem and natural environment can be maintained.

At this time, since a large number of water permeation holes 4 are formed in the U-shaped steel sheet piles 1a and 1b constituting the sheet pile wall 1, the landscape restoration wall 2 located above the water surface of the river R and Water is also permeated and supplied from the land G side on the back surface of the sheet pile wall 1 through these water permeation holes 4 to the planting restoration material 3a in the space, and the sheet pile wall 1 and the landscape restoration wall 2 are also supplied. Since the filling material holding member 5 having a large number of small holes 5a is attached to the lower end opening of the void portion formed between the gaps, the planting filling material 3a in the void portion is attached to these through the small holes 5a. The water is sucked up, and the plants grown on the landscape restoration wall 2 do not dry and die. Then, as a matter of course, microorganisms also propagate on the planting supplementary material 3a in the void portion.

According to the composite steel sheet pile revetment structure in the river of this Example 1, the scenery restoration wall 2 is normally about 3 months between warm spring and summer, depending on the surrounding environment and season.
The moss is attached to the surface of the plant and the seeds of the attached plant germinate.

Example 2 Next, FIG. 5 shows a composite steel sheet pile revetment structure on the coast S according to Example 2 of the present invention. Unlike the case of Example 1 above, sea waves and splashes are shown. The ceramic flat plate 2b which is affected by seawater is provided with through holes 7 having a diameter of 40 mmφ at a ratio of 3 in the horizontal direction and 2 in the vertical direction at substantially equal intervals. On the back side of each through-hole 7, a relatively coarse open-venting net 8 is arranged, and further, in the space formed between the sheet pile wall 1 and the landscape restoration wall 2, at the lower part thereof. Breeding supplementary material 3b made of gravel that allows small animals to grow is filled with planting supplementary material 3a made of natural soil on which plants can grow, and the above-mentioned breeding that is located above the height of the water surface. Supplementary material
A partition plate 9 made of a steel plate is provided at the boundary between the 3b and the planting compensation material 3a.

Therefore, according to the composite steel sheet pile revetment structure of this Example 2, the influence of seawater is cut off in the region above the partition plate 9 filled with the planting restoration material 3a, and plants grow,
Further, in the region below the partition plate 9 affected by seawater, the through hole 7 of the ceramic flat plate 2b forming the planned restoration wall 2 is formed.
Small animals such as crabs and oysters invade from there and grow within the through holes 7 and the rearing material 3b.

[0030]

As described above, according to the composite steel sheet pile revetment structure of the present invention, the landscape restoration wall built in front of the sheet pile wall can be used for a long period of time without impairing the excellent workability and economy of the steel sheet pile revetment. Can solve landscape problems,
Moreover, this landscape restoration wall can grow plants and grow small animals to protect and maintain the ecosystem and natural environment.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional explanatory view showing a composite steel sheet pile revetment structure in a river according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

3 is a cross-sectional explanatory view taken along the line III-III of FIG.

FIG. 4 is a partial perspective explanatory view showing a method for constructing a landscape restoration wall on the front surface of the sheet pile wall in FIG. 1.

[Fig. 5] Fig. 5 is a cross-sectional explanatory view similar to Fig. 2, showing a composite steel sheet pile revetment structure on a coast according to a third embodiment of the present invention.

FIG. 6 is a partial perspective view similar to FIG. 4 showing a conventional steel sheet pile revetment structure.

FIG. 7 is a partial perspective view similar to FIG. 4, showing a conventional steel sheet pile revetment structure.

[Explanation of symbols]

R ... river, G ... land, 1 ... sheet pile wall, 1a, 1b ... U-shaped steel sheet pile,
2 ... Landscape restoration wall, 2a, 2b ... Ceramic flat plate, 3a ... Planting filling material, 3b ... Rearing filling material, 4 ... Water permeable hole, 5 ... Filling material holding member, 5a ... Small hole, 6 ... Flat bar, 7 ... Through hole, 8 ... Suction prevention net, 9 ... Partition plate.

Claims (7)

[Claims] Formed in claim 1. A sheet pile wall constructed a large number of steel sheet piles by Da設in parallel form, permeability 10 ^-5 ~10 ⁰ cm / sec and the volumetric water content of 25% or more of the porous sintered body A composite steel sheet pile revetment structure, comprising a ceramic flat plate adhered to the front surface of the sheet pile wall, and a landscape restoration wall that restores the landscape of the sheet pile wall while allowing growth and growth of living things. 2. The steel sheet pile is a water permeable steel sheet pile having a plurality of water permeation holes for penetrating water from the back side of the sheet pile wall into the landscape restoration wall to penetrate the sheet pile wall. Composite steel sheet pile revetment structure. 3. The steel sheet pile is composed of U-shaped steel sheet piles, and a plant capable of growing plants is provided in a void portion formed between the sheet pile wall constructed of the U-shaped steel sheet pile and the landscape restoration wall. The composite steel sheet pile revetment structure according to claim 1 or 2, which is filled with a plant supplement and / or a rearing supplement capable of growing small animals. 4. A space between a sheet pile wall constructed of U-shaped steel sheet piles and a landscape restoration wall is filled with a rearing material capable of growing small animals at the bottom and a plant at the top. The composite steel sheet pile revetment structure according to claim 3, which is filled with a vegetative filling material that can grow and the boundary between the breeding filling material and the planting filling material is located above the height of the water surface. 5. A vegetation filling material which is provided in a lower end opening of a void portion formed between a sheet pile wall constructed of U-shaped steel sheet pile and a landscape restoration wall and filled in the void portion. as well as/
Alternatively, the composite steel sheet pile revetment structure according to claim 3 or 4, wherein a supplementary material holding member for holding the breeding supplementary material is provided. 6. The composite steel sheet pile revetment structure according to claim 5, wherein the supplementary material holding member is water permeable. 7. A ceramic flat plate for constructing a landscape restoration wall is provided with a plurality of through holes, and on the back side of these through holes, a sheet pile wall constructed of U-shaped steel sheet pile and a landscape restoration wall are provided. 4. A suction preventing net for preventing the planting filling material and / or the breeding filling material filled in the space between them from being sucked to the outside through the through hole.
The composite steel sheet pile revetment structure according to any one of to 6.