JPH09296431A - Construction method of artificial beach and hanging frame device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method by which an artificial beach can be stably retained in the installed location even when it has suffered waves with relatively large energy and a hanging frame device by which a bag body can be suspended without breakage even before a stuffed material charged in the bag is solidified. SOLUTION: In a process charging a stuffing material in a netted bag, the stuffing material which gets solid in a specified time is filled in a netted bag body 1 and the bag body is submerged on the submarine before it gets solid. In this time, a shape-retaining frame 25 is positioned to arrange members 25a having respective sectional shapes to fit swelled netted bags 1. And respective netted bags are put on the shape-retaining frame 25. And then, a filling material is charged therein. The hanging frame device is provided with a frame body 20 having external members 20a with nearly the same profile with the netted bag body and extended members 20b between the external members 20a, ropes 21 stretched from a plurality of positions of the frame body, and plane bodies 22, 23 detachably fitted to the front ends of the ropes 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an artificial beach and a suspension frame device used in this method.

[0002]

2. Description of the Related Art Conventionally, artificial shores have been constructed in order to create an environment where organisms can easily live on sandy beaches. This artificial shore usually stacks concrete blocks such as tetrapots for breaking waves and rocks on the seabed, or randomly lays them down, and gradually builds up shellfish and algae over time, creating the action as a fish reef. , Have gained the effect of fish collection and fish reproduction, for example.

However, since such conventional artificial rocks are under severe sea conditions, they are directly affected by waves, especially in shallow waters, and they are destroyed, scattered, or pushed back toward the land, and scattered. However, the artificial shore may disappear completely when it is affected by a typhoon.

In order to solve such a problem, Japanese Unexamined Patent Publication (Kokai) 2
At -2308, as shown in FIG. 4, a plurality of block bodies 51 installed on the seabed, a plurality of tubular bag bodies 52 arranged in a mesh on the block body 51, and injection into the bag body 52. It proposes an artificial surf 50 composed of a filling material that is cured after being processed.

[0005]

However, the artificial shore 50 is constructed in such a manner that the tubular bag bodies 52 are alternately arranged in water one by one, and the concrete is struck in the inside to be arranged in a net shape. Since it takes time and labor, and the bag bodies cannot be integrally maintained in a net-like positional relationship, the block body 51 cannot always be held, and the loss of the artificial shore cannot be sufficiently prevented. was there.

The present invention has been made in view of such conventional problems, and provides a method for constructing an artificial surf that can be stably held at a set position even if a wave of relatively large energy is received. With the goal.

Another object of the present invention is to provide a hanging frame device which can be suspended without damaging the bag even before the filling material filled in the bag is cured.

[0008]

The present invention has been made in view of the above object, and its gist is to fill a net-like or lattice-like bag with a filling material that cures after a predetermined time. It is a method of constructing an artificial shore, which is characterized in that it is settled on the seabed before the filling material hardens.

In the artificial surf construction method of the present invention, in the step of injecting the filling material into the net-like or lattice-like bag, the expanded bag is a member having a cross-sectional shape that is the same as that of the bag. Alternatively, the shape-holding frame formed in the arrangement may be placed, the bag may be placed on the shape-holding frame, and the filling material may be injected.

In the method for constructing an artificial shore according to the present invention, when the net-like or lattice-like bag is sunk on the seabed, the bag is provided so as to cover the natural boulder belt on the seabed, or an artificial piece previously provided on the seabed. Block body, for example, a cubic concrete block having a large water hole penetrating each surface, or a concrete structure such as a tetra pot. In this case, since the net-like or lattice-like bag is sunk on the seabed before the filling material is hardened, it deforms into the uneven shape of the boulders or blocks or the shape adapted to the complicated seabed topography.
It is then cured. Therefore, boulders and blocks are
It can be held and stabilized by a hardened net-like or lattice-like bag body, and is not washed away by water flow or waves, and can protect boulders and algae adhering to blocks from water waves and waves. Further, the net-like or lattice-like bag can be sunk on a flat seabed, and in this case, gravel is put into the mesh portion, that is, the hole on the outside of the bag, so that both the surface of the gravel and the bag are covered. It can be an attachment substrate for algae.

In the method for constructing an artificial shore according to the present invention, the net-like or lattice-like bag has high flexibility and strength, nylon,
A cloth made of a synthetic resin such as vinyl or polyester resin, a cloth made of a natural material such as cotton or hemp, or a non-woven fabric that does not deteriorate in water, and has one or more inlets.
The filling material can be injected from this inlet.

In the artificial surf construction method of the present invention, the filling material which is cured after a predetermined time is concrete, underwater concrete and mortar, or concrete, underwater concrete and mortar mixed with coal ash, volcanic ash or construction soil, Alternatively, it may be a mixture of concrete, underwater concrete and mortar with other admixture. Here, by using a relatively light specific gravity for the filling material, for example, by using coal ash or volcanic ash, it is possible to form an artificial rock that will not be buried even in the soft seabed,
On the seabed where the seabed is stable and the waves are strong, it is also possible to form a stable artificial rock by using gravel, crushed stone, slag, etc., which has a high specific gravity as the filling material. Thus, the specific gravity of the filling material can be appropriately adjusted according to the conditions of the seabed.

In the method for constructing an artificial shore according to the present invention, when a net-like or lattice-like bag is sunk in a sea area where there is no seedling of algae such as sand and mud, mother algae and seed threads are attached to the surface of the bag By doing so, a new algal bed can be created.

Another subject matter of the present invention is a hanging frame used for suspending a net-like or lattice-like bag body filled with a fluid and curable filling material, wherein the net-like or lattice-like hanging frame is used. A frame body including an outer shell member having substantially the same outer shape as that of the bag body and a bridge member installed between the outer shell members, a cord body extending from a plurality of positions of the frame body, and a tip of the cord body. The suspension frame device is provided with a planar body that is provided so as to be able to be locked.

[0015]

In the method for constructing an artificial rock of the present invention, the shape holding frame is placed on the work boat, and the net-like or lattice-like bags are placed in the same arrangement on the shape holding frame. Then, the filling pipe communicating with the filling material supply source is sequentially connected to the plurality of filling ports of the bag body to fill the filling material into the bag body. After filling the filling material, and before the filling material is still hardened, the lifting frame device is hung vertically above the artificial shore and the tip of the cord is attached to the planar body engaged with the bag body. The artificial shore is lifted by locking it, and it is sunk to cover the target sea area, that is, the boulders on the seabed. The filling material in the bag body is bent and hardened in a shape corresponding to the unevenness so as to cover the entire boulder. Therefore, in the artificial rock thus formed, the bag body and the boulders are fitted to each other to obtain high stability.

[0016]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1A is a plan view of the artificial beach 5, and FIG. 1B is a cross-sectional view taken along the line AA of FIG. In FIG. 1, an artificial surf 10 is injected into the bag body 1 which is formed on the seabed 5 and has a lattice-shaped body 1 which is integrally formed.
Concrete as the filling material 2 which is cured after a predetermined time is provided.

Here, the bag body 1 is made of nylon fiber or the like having high flexibility and strength, and includes five tubular bag bodies 1b extending in the X direction and five tubular bag bodies 1a extending in the Y direction. And are communicated internally, and are integrally formed in a lattice shape. In addition, the bag 1 is provided with filling ports 6 for filling materials 2 at a plurality of locations.
Is provided. Therefore, the bag 1 has 4 × 4 in both XY directions.
Since the grid portion 1c, that is, the hole is formed, the water flow of the wave can be escaped from the grid portion 1c even when the wave is received, and the lifting pressure of the wave is not greatly received, and the installation position as a whole. Can stay in.

As shown in FIG. 2, in the artificial shore 10, the gravel 3 is put into the mesh portion 1c of the bag 1, and the gravel 3 and the bag 1 are
Both surfaces can be algae attachment substrates.

Further, as shown in FIG. 3, the artificial shore 10 can be provided so as to cover the bag body 1 filled with the filling material 2 on the natural boulders 4 existing on the seabed 5, In this case, since the boulders 4 are stable and are not washed away by the waves, the algae attached to the boulders 4 can be protected from the waves. Here, the bag 1 is integrally formed in a lattice shape in which seven tubular bags 1b extending in the X direction and nine tubular bags 1a extending in the Y direction are internally communicated with each other. Has been done.

Thus, the tubular bags 1b, 1 in both the XY directions are
The number of a and the intervals between the tubular bags 1a and 1b are appropriately determined according to the size of the object covered by the bag 1, that is, the boulder 4 in FIG. 3 and the block body (not shown). Can be set. Generally, the diameter of the bag cross section is 2
If it is less than 0 cm, it is not possible to obtain a sufficient weight to stably fix a natural seabed object such as a boulder. On the other hand, if it is too large, it is impossible to maintain a substantially circular shape as originally planned after hardening. It is preferably about 60 cm. In addition, the size of the grid or holes should be such that the covered boulders do not move or, as shown in Fig. 4, several tens of centimeters.
50 cm to several meters to put small gravel 8 or large gravel 7 of about 1 m and to make the gap a living space such as abalone
It is preferable that Furthermore, the holes of the lattice-shaped bag body 1 are not limited to the rectangular shape as shown in the drawing, but may be other polygonal shapes, circles, or ellipses.

Next, the suspension frame device of the present invention will be described with reference to FIGS. In addition, in FIG. 5, for convenience of illustration, an artificial beach 10 having a shape different from those in FIGS. 1 and 3,
That is, the artificial surf 10 provided with the tubular bag body extending three in each of the X and Y directions is shown, and the cord 21 and the planar body 2 are also shown.
2 also showed only a part of it. In FIG. 5, the hanging frame device includes a frame body 20 including an outer shell member 20a having a rectangular outer shape that is substantially the same as that of the artificial shore 10 and a erection member 20b that is bridged across the outer shell members 20a. Frame 2
And a cord body 21 extending from a plurality of locations of 0 and this cord body 2
1 is provided with the sheet-like bodies 22, 23, 30 which can be locked.

Here, the erection members 20b may be formed in the same number and in the same arrangement as the tubular bag body other than the tubular bag body forming the outer shape of the artificial shore 10 as shown in FIG. Also, FIG.
As shown in FIG. 2, the erection member 20 of the frame body 20 (illustrated by a dotted line)
b may be arranged in a smaller number than the number of tubular bags other than the tubular bag forming the outer shape of the artificial beach 10 (shown by the solid line). For example, as shown in FIG. Two lines may be arranged in each of the two directions, or one line may be arranged in the X direction and two lines may be arranged in the Y direction as shown in FIG. 8B.

The planar members 22, 23, 30 are made of synthetic resin, cotton cloth or non-woven fabric which does not deteriorate in water, as shown in FIG. 6 (a).
(b) or can be formed as shown in FIG. That is, in FIG. 6 (a), the sheet 22 is a single strip 2
Locking tools 2 for locking the cords 21 respectively to 2b
It is formed by providing 2a and is attached to the tubular bag or is not attached to the tubular bag. Further, in FIG. 6 (b), the planar body 23 is formed by providing two belt-shaped members 23b with locking tools 23a for locking the cord 21 respectively, and sticking them to the tubular bag body. Place it. Further, in FIG. 9, the sheet 30 is obtained by cutting both ends of a strip 31 of a single piece along the dotted line 33 of FIG. 9 (a) and folding it along the dashed line 32 toward the upper side of the paper of FIG. Once sewn and formed as shown in FIG. 9B, the tip 3 sewn to form the annular portion 35.
5a and 35b are twisted and overlapped and sewn as shown in FIG. 9 (c), and the annular portion 34 on the opposite side is also formed in the same manner. The sheet-shaped body 30 thus formed is passed under the tubular bag body and
0 (a) and the coil are arranged as shown in FIG.

Further, the cord 21 is formed by using a bendable and flexible member such as a wire rope, a resin rope or a chain, and providing a locking tool (not shown) at its tip. In order to prevent the cord 1 from being greatly deformed and damaged by the biased force of the bag body 1 when the artificial shore 10 before the filling material 2 is cured is suspended, Place it evenly on the frame. For example, when the artificial shore 10 and the frame body 20 have substantially the same shape, any one of the planar bodies 22, 23, 30 is provided between all the positions where the bag body 1 intersects to make the frame body 20 artificial. The cords 21 are arranged vertically above the shore 10 and extend vertically downward from the same number of positions in the frame 20 that are vertically above any of the planar bodies 22, 23, 30. The locking tool at the tip is the locking tool 22 of the planar bodies 22 and 23.
a, 23a, or the annular portions 34, 35 of the planar body 30 are engaged. In addition, as shown in FIGS. 8A and 8B, when the erection member 20b of the frame body 20 is less than the number of bag bodies 1 other than the tubular bag body forming the outer shape of the artificial surf, Body 2
Similar to the above, any one of 2, 23, 30 is provided between all the positions where the bag body 1 intersects, and the frame body 20 is arranged vertically above the artificial shore 10 and the planar bodies 22, 23 in the frame body 20 are arranged. , 30
A cord member 21 extends vertically downward from a position located vertically above any of the above, and a erection member adjacent to the planar members 22, 23, 30 without the erection member 20b of the frame body 20 vertically above. 20b or the cord member 21 extending obliquely in both directions from the outer shell member 20a, and the locking tool at the tip of the string body 21 is used as the locking tools 22a, 23a of the planar members 22, 23 or the planar member 3.
0 annular portions 34 and 35 are engaged. That is, FIG.
In the artificial shore 10 of (a), since there is no erection member for the frame body 20 vertically above the bag portion indicated by reference numeral 10x, the erection member portions 20x, 20 on both sides in the vicinity thereof are provided.
The cord body is extended obliquely downward from x, and the locking tool at the tip of the cord body 21 is engaged with the locking tools 22a, 23a of the planar bodies 22, 23 or the annular portions 34, 35 of the planar body 30. If combined, the bag body 1 can be suspended with a uniform force without damaging the bag body 1 as in the case where the artificial shore 10 and the frame body 20 have substantially the same shape.

As for the position for lifting the bag body, in addition to the position shown in FIG. 5, the position where the bag body 1 intersects may be lifted.

Next, the method for constructing the artificial shore according to the present invention will be described. First, the shape-retaining frame 25 shown in FIG. 7, that is, the member 25a having a semicircular cross-section that fits when the bag body 1 is inflated, is formed in the same arrangement as the lattice-shaped bag body 1. The frame 25 is placed on a work boat (not shown), and the lattice-shaped bags are placed on the shape holding frame 25 in the same arrangement. Then, the injection pipe 30 communicating with the concrete supply source installed on the quay or the like is sequentially connected to the plurality of injection ports 6 of the bag body 1 to inject concrete as the filling material 2 into the bag body. Here, the filling rate of concrete into the bag body 1 is 80 to 90% so that the artificial rock 10 is easily adapted to the seabed topography and that the bag body can be flexibly bent even when placed on a boulder. The degree.

After the concrete is filled, it is transported to the target sea area and is lifted before the concrete is hardened (not shown).
The hanging frame device is hung vertically above the artificial sea 10 by the above method, and the distal end of the cord 21 is engaged with the bag body 1 to make the artificial sea 10
Is lifted and sunk so as to cover the boulders 4 on the seabed 5 as shown in FIG. The concrete in the bag body 1 is bent and hardened to cover the entire boulder 4 in a shape corresponding to the unevenness of the boulder 4. Therefore, in the artificial rock 10 thus formed, the bag body 1 and the boulders 4 are fitted to each other, and high stability can be obtained.

[0028]

The method for constructing an artificial shore according to the present invention uses a net-like or lattice-like bag, so that this bag is a seabed rock.
It will cover the gravel and the artificial block that was previously deposited, etc. from above while leaving it as a habitat for living things.
These boulders, gravel and artificial block bodies can be stabilized.

Further, the bag body connected in a mesh or lattice form is
When a wave is received, the water flow of the wave can escape from the mesh or grid, and it can suppress the wave itself to the resistance of the wave as much as possible. The object on the seabed can be stably held while staying in the position.

Further, since the filling material is preliminarily injected into the bag body communicating with the net-like or lattice-like shape before it is deposited on the seabed, the filling material can be spread to every corner of the bag body. Therefore, it is possible to prevent insufficient filling of the uneven top portion which is likely to occur when the filling material is injected after the bag body is sunk on the seabed where the unevenness is large due to ups and downs, boulders and the like.

Furthermore, since the filling material is injected into the bag body which is connected in a mesh or grid pattern, and before the filling material is hardened, the artificial shore is placed on boulders, gravel and blocks on the seabed. It can be formed in a shape in which it is closely adhered along the unevenness. Therefore, it is possible to sufficiently increase the holding strength for the rocks, gravel, and block bodies on the seabed after hardening.

Further, since the artificial frame formed by injecting the filling material into the bag is suspended by the suspension frame device, it is possible to prevent the bag from being largely deformed and damaged by an unbalanced force.

[Brief description of drawings]

FIG. 1 (a) is a plan view of an artificial beach, and FIG. 1 (b) is A- of (a).
It is A sectional drawing.

FIG. 2 is a plan view of an artificial beach in which gravel is put in the lattice portion of the bag body.

FIG. 3 (a) is a plan view showing a state in which an artificial rock is provided on a natural boulder existing on the seabed, and FIG. 3 (b) is a sectional view taken along line BB of (a).

FIG. 4 is a cross-sectional view of an artificial beach different from FIGS. 1 and 3.

FIG. 5 is a perspective view showing a state where the artificial shore is suspended by the suspension frame device of the present invention.

6 (a) and 6 (b) are perspective views showing a mounting state of the planar body of the suspension frame device of the present invention to the bag body.

FIG. 7 is a side view showing a state where the filling material is injected into the bag body.

FIG. 8 is a simplified plan view showing an arrangement of erection members in the suspension frame device of the present invention.

9A, 9B, and 9C are plan views showing a method for forming a planar body different from that in FIG.

10 (a) and 10 (b) are side views showing a state in which the planar body of FIG. 9 is wrapped around a tubular bag body.

FIG. 11 is a perspective view showing the arrangement of the planar bodies of FIGS. 9 and 10 in an artificial shore.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag body 2 Filling material 10 Artificial shore 20 Frame body 20a Outer shell member 20b Construction member 21 Rope body 22,23,30 Planar body 25 Shape holding frame

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuo Suzuki 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Ma Corp. (72) Inventor Eijiro Sagisawa 1-2-6 Dojimahama, Kita-ku, Osaka Asahi Kasei Kogyo Within the corporation

Claims (3)

[Claims] 1. An artificial shore characterized by injecting a filling material which is cured after a predetermined time into a net-like or lattice-like bag body, and before the filling material is hardened, the bag body is sunk on the seabed. How to build. 2. A shape-holding frame formed in the same arrangement as the bag body by a member having a cross-sectional shape into which the expanded bag body fits in the step of injecting the filling material into the mesh-like or lattice-like bag body. Place, place the bag on the shape holding frame,
The method for constructing an artificial surf according to claim 1, wherein a filling material is injected. 3. A hanging frame used for suspending a net-like or lattice-like bag body filled with a fluid and curable filling material, the outer frame member having substantially the same outer shape as the bag body, And a frame body provided with a erection member laid between the outer shell members, a cord body extending from a plurality of positions of the frame body, and a planar body provided at the tip of the cord body so as to be locked. A hanging frame device provided with.