JP2012158915A - Revetment having creature inhabitation stimulating function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new construction or existing concrete revetment with a front face equipped with natural materials having required functions equal to those of stone masonry, which easily creates a habitable environment for creatures at low costs, prevents temperature rise of the revetment during a low tide period, and reduces influence on the water area.SOLUTION: A fascine 2 which is a material in a bundle formed from collected narrow tree branches or the like having an approximate diameter of several centimeters, is attached to a net 4 or a frame made of a synthetic resin or natural fiber component durable to sea water so as to constitute a decorative board 3, which is installed on the face of a concrete revetment 1.

Description

  The present invention relates to a revetment with a biological habitat promoting function that can more advantageously form an environment suitable for aquatic animal habitat and aquatic plant growth, particularly for revetments of inner bays, canals, and waterways.

  Most of the revetments in inner bays, canals and waterways are made of concrete. In contrast to this concrete revetment, the conventional stone masonry revetment has irregularities and rough surfaces on the surface of stones, weak color tone of territory, water retention of stones, deep holes caused by piling and holes leading to backfilling parts, etc. It is a good place for living creatures.

  In particular, the growth of algae, the primary producer of the food chain, creates a variety of surfaces based on the rough surface of the will surface, the weakness of teri, etc., ranging from green algae that is resistant to direct sunlight to diatoms that grow at low light intensity Supports the growth of algae, and the concrete revetment is smooth and has few small shadows.

  Therefore, although there is a hidden place in the stone masonry, crabs and shrimps that feed on algae live and fish that feed on them gather on the revetment.

  Because the stone shows water retention, the revetment space exposed in the gas phase due to the tide does not heat up due to moisture even when exposed to the sun, and the temperature from the revetment is high even when the tide is filled and water touches the wall. Regardless of the temperature, the temperature rise is small.

  However, when the concrete revetment is exposed to direct radiation, the temperature rises to 50 ° C or higher. When the tide is filled with water in this state, the temperature of the water rises and the temperature of the water that touches the whole revetment rises.

Moreover, compared with concrete, the surface area of masonry shows 1.4 to 1.6 times by unevenness and a rough surface. The algae growing here are not only food, but also absorb oxygen O ₂ by photosynthesis during the day using CO ₂ in water as a raw material. This oxygen production serves to maintain the habitat of underwater creatures.

  The masonry joints are not only hidden areas such as crabs, but also when the person falls into the water, the joints are a clue, a foothold, a climbing revetment, and a safe and secure revetment that can secure the body, concrete It disappears at the revetment.

Now, functions of the masonry revetment, creatures of habitat processing, high-oxygen production and CO ₂ absorption, have been developed and new concrete revetment by obtaining the safety measures to the man overboard person, but have also been carried out reclamation, m ² per 5 Expensive and large-scale creation of 10 million yen and 3 to 5 million yen per meter is a difficult situation due to budget problems.

Patent Document 1 listed below provides an intertidal zone in front of a seawall structure and the intertidal zone as a provision of a seawall with a biological habitat promoting function that can broaden the aquatic organism's habitat over a conventional seawall with a biological habitat promoting function. In the height position washed by the wave on the upper side, it has a long and narrow opening in the horizontal direction, and the depression has a multistage arrangement of depressions whose height is equal to or less than 1 m and whose depth is equal to or greater than the height. Is provided.
JP 2002-285523 A

In addition, Patent Document 2 below discloses that at least one of the fish nest blocks having a rectangular C-shaped cross section faces the rear surface of the rear wall toward the slope of the river or waterway shore, and the front wall and the rear wall. A fish nest block installation zone that is installed so as to extend and be positioned in the water flow direction, and a cage frame installation in which at least one of the rectangular cage frames is installed so that one side faces the slope side With the upper part of the cage frame in the cage frame installation zone positioned above the upper surface of the ceiling wall of the fish nest block in the fish nest block installation zone. They are arranged side by side so as to be adjacent to each other.
Japanese Patent Laid-Open No. 2005-188021

  Patent Document 1 and Patent Document 2 are based on a method of stacking blocks on the front side of the revetment to form a large number of small gaps with depth, or forming a small gap with a depth by providing irregularities on the front side of the revetment, Because of the shape of the revetment itself and the special configuration of the blocks used, there are difficulties in terms of cost and construction work. In addition, large-scale repair work is required for existing concrete revetments.

  In consideration of the above circumstances, the object of the present invention is to use a natural material that has the same function as the required masonry for the existing concrete revetment, and to install this on the front of the revetment, The purpose is to provide a revetment with a biological habitat promotion function that can easily and inexpensively create a living place for living creatures, prevent the revetment from becoming hot at low tides, and reduce the effects of water bodies.

  In order to achieve the above-mentioned object, the present invention according to claim 1 is made of soda, which is a material made of bundles of thin tree branches having a diameter of several centimeters, which is strong against seawater such as synthetic resin or natural fiber. The gist is to wear it on a revetment surface as a decorative board by wearing it on a net or frame.

According to the first aspect of the present invention, the creation of a living area on the revetment wall by a natural material called soda and the resumption of the food chain are achieved, and the primary producer of the food chain, the creation of a breeding place, and the adhesion by increasing the surface area and increasing the unevenness Expansion of algae growth space and creation of activity space under various illuminance conditions, production of CO ₂ required for photosynthesis by attached algae and increase of O ₂ produced by photosynthesis, prevention of high revetment temperature at low tide by wet soda Reduction of water area impacts can be obtained.

  In addition, the portion of soda that is rolled up in the natural material has an air layer, and the entire decorative board is kept at a temperature lower than the air temperature.

Similarly, because it is a natural material, the moisture contained in the material is retained and the algae grown on the surface of the material retain water, promoting a decrease in temperature, and various algae on the soda surface and inside the side surface. , And oxygen O ₂ production is carried out by photosynthesis with sunlight, creating an environment where fish, crab and shrimp can live.

  The gist of the present invention described in claim 2 is that the soda is made of a metal wire or a spring made of a polyester wire, horizontally or vertically, or a combination of both.

  According to the second aspect of the present invention, the soda can be made to be a spring made of a metal wire or a polyester wire, so that it can be made in the same manner as when the reed is rounded.

  In this way, the part that is rolled up into the natural material has an air layer with shadow, and when the outside is 32 ° C, the inside is kept at 28 ° C or less and below the air temperature, and even if it fills there and water enters Water temperature is lowered to prevent high temperature. Since it is a natural material, it promotes a decrease in temperature in combination with retention of moisture contained in the material and retention of the algae grown on the material surface.

  As described above, the revetment with the function of promoting living organisms according to the present invention can be applied not only to a new construction but also to an existing concrete revetment, using a natural material having a function equivalent to the required masonry. By constructing it and installing it in front of the revetment, it is possible to create a living place for living creatures easily and inexpensively, to prevent the high temperature of the revetment at low tide and to reduce the influence of the water area.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing a first embodiment of a revetment with a biological habitat promoting function according to the present invention, FIG. 2 is a side view of the same, and 1 is a concrete revetment.

  On the wall of the concrete revetment 1, a decorative board 3 made of soda 2, which is a bundle of thin tree branches with a diameter of several centimeters, was installed.

  The decorative board 3 made of the soda 2 is formed by attaching the soda 2 to a net 4 or a frame of a member resistant to seawater such as synthetic resin such as polyester or natural fiber such as hemp rope. These nets 4 or frames can be made of metal.

  The soda 2 can be formed into a cylindrical shape in the same manner as when the reed is rolled by using a metal wire 5 or a polyester wire 5 as a spring.

  Further, the cylindrical soda 2 can be arranged side by side as shown in FIG. 3 in addition to the case where the cylindrical soda 2 are arranged vertically as shown.

  In addition, the attachment to the net 4 or the frame spans the high tide (H / W) α position and the low tide (L / W) β position of seawater, and uses the empty part at the top of the net 4 or the frame, Plant decoration 6 is made with fresh or artificial flowers.

  The net 4 or the frame is fixed to the wall surface of the concrete revetment 1 with an anchor or the like. In the example shown in the figure, the lower end is suspended by a fixed anchor 7 to the seabed. In the figure, reference numeral 7a denotes an anchor wire that the fixed anchor 7 pulls.

  If the space 8 is secured when the net 4 or the frame is installed on the wall surface of the concrete revetment 1, the space 8 becomes a space on the back surface of the decorative plate 3 by the soda 2. The space 8 is formed by placing a post or a horizontal bar on the back surface of the net 4 or the frame to prevent the decorative plate 3 from directly adhering to the revetment wall surface. This space 8 keeps water in and out between the back surface and the front surface of the decorative board 3 by the soda 2.

  In the illustrated example, a handrail 9 is installed on the upper floor of the concrete revetment 1, and a planter 10 is arranged on the inside thereof.

  In this way, in FIG. 2, A indicates the intertidal suspended portion of soda 2, B indicates the intertidal suspended portion, and C indicates the intertidal suspended portion. If soda 2 is arranged vertically, the change in tide, that is, the tide is subtracted. In accordance with this, the fine particles of mud and organic matter that are suspended in the water move downward, move upward when the tide is full, and there is always no sediment on the soda surface, so the algae grows and changes generations to the food chain Supports primary production. In addition, the round surface of soda has a portion that receives direct irradiation and a portion that is always shaded, and has various woody and branch hulls, whereby various algae can grow.

  In other words, the soda installed on the front of the concrete revetment 1 has the same shape as that of a rounded reed, and the rounded part of the natural material has an air layer and is shaded. There are cases where the temperature is 28 ° C. or lower and lower than the temperature. For this reason, the entire decorative board is maintained at a temperature equal to or lower than the air temperature, and even if it fills there and water enters, the water temperature is lowered to prevent the temperature from rising.

  Since it is a natural material, it promotes a decrease in temperature in combination with retention of moisture contained in the material and retention of the algae grown on the material surface.

Also, various types of algae grow on the soda surface and the inside of the side, change generations, and in order to grow, oxygen O ₂ production is performed by photosynthesis using sunlight with CO ₂ dissolved gas in water as a raw material.

  The oxygen-containing water stays in the soda even during the night when photosynthesis is stopped, and there is always no oxygen deficiency in the veneer, and the environment has a dissolved oxygen content of 4 mg1 / l or more where many fish, crabs and shrimps can live. Maintain conditions.

  The soda 2 can be treated as a revetment design as a landscape design by stretching the branches of the bundled ones, and although not shown, the upper part of the soda 2 (a plurality of sodas 2 are bundled and the space of the bundling If you make a space to put soil in) or create a space to put pots planted with plants, you can plant the upper part of the revetment.

  In the case of side by side (horizontal stacking) of the soda 2 shown in FIG. 3, a hidden place is created in the space between soda and soda, corresponding to the creatures that prefer horizontal such as crabs, which also uses eels and the like. However, there is a characteristic that mud and organic matter of fine particles that saturate in water accumulate on the top of soda, and the growth of algae weakens depending on the volume.

  4 and 5 show an example in which the soda 2 is stacked horizontally and is a combination of vertical arrangement variations and arranged up to the top of the concrete revetment 1.

  In the case of side-by-side (horizontal stacking), soda 2 can be climbed because it has a staircase shape against what has fallen. In addition, by holding the soda 2 even in a vertical arrangement, the fingers can enter and secure a body and can climb up in adjacent side-by-side (horizontal stack) parts.

It is a front view which shows 1st Embodiment of the revetment with a biological habitat promotion function of this invention. It is a side view which shows 1st Embodiment of the revetment with a biological habitat promotion function of this invention. It is a front view which shows 2nd Embodiment of the revetment with a biological habitat promotion function of this invention. It is a front view which shows 3rd Embodiment of the revetment with a biological habitat promotion function of this invention. It is a front view which shows 3rd Embodiment of the revetment with a biological habitat promotion function of this invention.

DESCRIPTION OF SYMBOLS 1 ... Concrete revetment 2 ... Soda 3 ... Dressing board 4 ... Net 5 ... Wire 6 ... Plant decoration 7 ... Fixed anchor 7a ... Anchor wire 8 ... Space 9 ... Handrail 10 ... Planter

Claims (2)

  Soda, which is a bundle of thin tree branches with a diameter of several centimeters, is attached to a net or frame of a synthetic resin or natural fiber-resistant member such as synthetic resin and installed on the revetment surface as a decorative board. A revetment with a biological habitat promotion function.   The revetment with a biological habitat promoting function according to claim 1, wherein the soda is a metal wire or a spring made of polyester wire that is horizontally stacked or warped, or a combination of both.

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