JPH1143918A - Civil work construction unit, manufacture thereof, and civil work construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a sense of incongruity with natural environment by arranging a plurality of concrete blocks fixedly on one face side of a net piece, and placing natural logs or artificial logs fixedly on the concrete blocks. SOLUTION: A square wire gauze 5 with mesh 8a is formed, and a concrete block 6 is formed in such shape that the flat upper face 6a side is slightly narrower than the lower face 6b side. A plurality of blocks 6 are fixedly arranged on the wire gauze 5, along the peripheral edge part of the wire gauze 5 within a frame line 7 so as to form partitioned space 33 of approximately square shape. Logs 30a out of logs 30 are placed on a pair of opposed blocks 6 on one side, and logs 30b are placed on a pair of opposed blocks 6 on the other side through the logs 30a. Bolts 32 are inserted through the through holes of the logs 30a, 30b and thread-fastened to nuts of the blocks 6. There is therefore no sense of incongruity with surrounding environment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a civil engineering structure unit, a method for manufacturing a civil engineering structure unit, and a civil engineering structure.

[0002]

2. Description of the Related Art Construction methods for civil engineering structures, such as seawalls (including seabeds), include natural stones as a unit for civil engineering structures on seawalls and the like in order to grow plants and create fish nests at an early stage. In some cases, a large number of holding units are laid. In each of the natural stone holding units, a plurality of natural stones are bonded on a flexible sheet body via an adhesive, and if this natural stone holding unit is used, the natural stone can be returned to the natural early stage. In addition to being able to transport natural stones to revetment slopes etc., natural stones fall down from revetment slopes after transportation even if the revetment slopes are steep. That can be prevented. This makes it possible to improve the workability of the revetment and the like, and to maintain the revetment after the construction for a long period of time.

The inventor of the present invention uses a concrete block in place of the natural stone bonded to the above-mentioned flexible sheet in order to improve the transportability based on cost reduction and weight reduction. Are thinking.

[0004]

However, as described above, when a concrete block is used in place of natural stone, the soil is covered directly near a river or the like, and is covered above a normal water level of a river or the like. When the concrete block is exposed due to spillage or the like, the concrete block is visually recognized from above, which may give a sense of discomfort to the surrounding natural environment.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a civil engineering structure which does not give a sense of discomfort to the surrounding natural environment even when a concrete block is used. To provide a unit for use. A second object is to provide a method for manufacturing the above civil engineering building unit. A third object is to provide a civil engineering structure using the civil engineering building unit.

[0006]

In order to achieve the first object, according to the present invention, a plurality of concrete blocks are fixed to a net-like piece, and the plurality of concrete blocks are fixed.
And a natural block or a quasi-natural tree is fixed on the plurality of concrete blocks by laying down on the one side of the net-like piece.

[0007] In a preferred embodiment of the present invention,
It is as described in claims 2 to 7 and 10.

In order to achieve the first object, according to the invention of claim 8, a plurality of concrete blocks are fixed to a rectangular net-like piece at a peripheral portion of the net-like piece. The concrete block is arranged so as to form a rectangular frame on one surface side of the net-like piece, and for fixing an object to be fixed on the upper part of the concrete blocks located at least at four corners of the plurality of concrete blocks. The fixing device is provided as a unit for civil engineering construction.

[0009] In a preferred aspect of the present invention,
It is as described in claims 9 and 10.

[0010] In order to achieve the second object, a first aspect is provided.
In one aspect of the invention, a plurality of uncured concrete blocks are arranged on a mesh piece on one surface side of the mesh piece,
Next, a fixture is pushed into the upper part of the uncured concrete block, and then, after the concrete block is cured, a natural tree or a pseudo-natural tree is fixed on the concrete block via the fixture. And a method for manufacturing a civil engineering building unit.

A preferred embodiment of the invention according to claim 11 is as described in claim 12.

[0012] To achieve the third object, a first aspect is provided.
According to the third aspect of the present invention, in the civil engineering structure in which a large number of civil engineering building units are laid on the slope, each of the civil engineering building units is formed into a rectangular net-like piece and a plurality of concretes at the periphery of the net-like piece. The concrete blocks are fixed and the plurality of concrete blocks are arranged so as to form a rectangular frame on one side of the net-like piece, and natural trees or pseudo-natural trees are placed on the plurality of concrete blocks by the plurality of concrete blocks. Concrete block holding units fixed to form a girder-shaped framework corresponding to the rectangular frame of the t-block, and each of the concrete block holding units is a natural girder-shaped natural tree or a pseudo-natural tree. The arrangement direction is such that the arrangement direction of a pair of natural trees or pseudo-natural trees located at the upper position is arranged vertically along the slope.

[0013] In order to achieve the third object, according to the invention of claim 14, in a civil engineering structure having a large number of civil engineering building units laid on a slope, each of the civil engineering building units includes: A plurality of concrete blocks are fixed to a rectangular mesh at the peripheral portion of the mesh,
The plurality of concrete blocks are arranged so as to form a rectangular frame on one surface side of the net-like piece, and a natural tree or a pseudo natural tree is formed on the plurality of concrete blocks in a rectangular frame of the plurality of concrete blocks. The concrete block holding units are fixed so as to form a cross-girder-shaped framework while corresponding to each other. Each of the concrete block holding units is a natural girder-like natural tree or a pseudo-girder in relation to an adjacent concrete block holding unit. Of the natural trees, a pair of natural trees or pseudo-natural trees located at the uppermost position and a pair of natural trees or pseudo-natural trees located below are arranged so as to be alternately arranged. There is a configuration.

[0014]

According to the first aspect of the present invention, even if a plurality of concrete blocks are fixed to the mesh piece in place of the plurality of natural stones, a natural tree or a pseudo-natural tree is placed on the plurality of concrete blocks. Is laid down and fixed,
Many of the plurality of concrete blocks can be covered with a natural tree or a pseudo-natural tree so that the plurality of concrete blocks can be hidden from above. For this reason,
Even if the civil engineering building unit is used directly while reducing costs, or even if the covered soil is washed away and exposed, a sense of discomfort to the surrounding natural environment can be significantly reduced. . In addition, since the natural tree or the pseudo natural tree is laid on the upper portion of the civil engineering structure unit, the sediment (eg, lower than the normal water level) on the surface of the civil engineering structure (eg, revetment) that is easy to flow. When used as a sediment on the side, the loss of stones, covering soil, earth and sand, etc. above the normal water level) can be effectively prevented with a relatively long length (axial length).

According to the second aspect of the present invention, a plurality of natural trees or pseudo natural trees are provided, and the plurality of natural trees or pseudo natural trees are arranged so as to form a rectangular frame. In addition to being able to effectively prevent runoff of sediment on the surface of civil engineering structures by arranging them neatly, in a rectangular framework formed by a plurality of natural trees or pseudo-natural trees, The filling material can be filled, and with the middle filling material, the revetment function and the like can be further exerted, and it is possible to promote appropriate adaptation to the surrounding natural environment.

According to the third aspect of the present invention, since the frame is formed in a girder shape by using a natural tree or a pseudo natural tree, a rectangular frame can be easily formed from a natural tree or a pseudo natural tree. Accordingly, the same operation and effect as those of the second aspect can be obtained.

According to the invention of claim 4, since the natural tree or the pseudo natural tree is detachably fixed to the concrete block, the natural tree or the pseudo natural tree rots or is damaged and needs to be replaced. Can be easily replaced.

According to the fifth aspect of the present invention, the plurality of concrete blocks are sequentially arranged so as to be continuous in the lower region of the plurality of natural trees or pseudo-natural trees, and the plurality of concrete blocks are arranged in a plurality. Is set to constitute a rectangular compartmental space corresponding to the framework of natural wood or pseudo-natural wood, and since at least the compartmental space is filled with filling material, the natural wood or pseudo-natural wood frame space Since the space defined by the concrete blocks overlaps, the filling depth of the filling material can be increased, and the filling material filled therein can be increased. Therefore, the revetment function and the like can be further enhanced than in the case of the above-described claim 2, and the adaptation to the surrounding natural environment can be promoted by the content of the filling material.

According to the sixth aspect of the present invention, since the filling material is natural stone, not only the revetment function and the like can be enhanced based on the natural stone, but also it can be optimized as a sink. This will provide a favorable environment for various aquatic ecosystems. Of course, this natural stone is effectively prevented from being washed away by concrete blocks, natural trees or pseudo-natural trees.

According to the seventh aspect of the present invention, since the filling material is vegetation soil, not only can the revetment function and the like be enhanced based on the vegetation soil, but also plant growth is promoted and greening is promoted. Will be able to do that. Of course, this vegetation soil will be effectively prevented from being washed away by concrete blocks, natural trees or pseudo-natural trees.

According to the eighth aspect of the present invention, a plurality of concrete blocks are fixed to the rectangular net-like piece at the periphery of the net-like piece, and the plurality of concrete blocks are rectangular on one side of the net-like piece. Since the fixing tool for fixing the object to be fixed is provided on at least the upper part of the concrete blocks located at the four corners of the plurality of concrete blocks, the fixing tool is arranged so as to form a frame. Can be used to fix the object, and the object can significantly reduce the sense of discomfort with the surrounding natural environment, as in the above-described claim 1.
It is possible to prevent the sediment from flowing off at the surface of the civil engineering structure that is easy to flow. In addition, materials existing at the construction site can be easily used as objects to be fixed.

According to the ninth aspect of the present invention, each of the concrete blocks is hardened so as to enclose the vicinity of each of the concrete blocks of the mesh piece, and at least one of the plurality of concrete blocks is hardened. A nut as a fixture is embedded and fixed above the concrete block located at each of the four corners while exposing its receiving port from the upper surface of the concrete block, so that the lower part of each concrete block is flexible. Since the sheet body is a mesh piece, it is not necessary to consider the brittleness of the flexible sheet body, but such a mesh piece enters the inside of the concrete block, and the mesh The holding force between the piece and the concrete block can be improved. Moreover, since the concrete block is used, when obtaining the civil engineering building unit, the uncured concrete block is placed on the mesh piece, and a part of the block is passed through the mesh of the mesh piece on the other side of the mesh piece. To make it wrapped around the portion of the mesh piece where the concrete block is located. If left in that state, the concrete block hardens, and the concrete block and the concrete block harden. The above-described holding relationship with the mesh piece is obtained. For this reason, it is not necessary to handle the adhesive in the manufacturing, and the work involved is omitted, and the workability in the manufacturing can be improved. On the other hand, based on the fact that the nut is embedded and fixed while exposing the receiving port from the upper surface of the concrete block, the nut can be fixed to the concrete block by using the hardening of the concrete block. Thus, the work of attaching the fixture can be facilitated. In addition, since the fixing tool is a nut, it is not necessary to make the fixing tool protrude from the upper part of the concrete block, and the fixing object can be cleared without lifting and fixing the object.
It is possible to perform a series of fixing operations using bolts once placed on the block. For this reason, the work load of assembling the fixed object to the concrete block can be reduced.

According to the tenth aspect of the present invention, since the natural tree is the thinned wood, the thinned wood to be discarded can be effectively used.

According to the eleventh aspect of the present invention, on the net-like piece,
On one side of the net, a plurality of uncured concrete blocks are placed, then a fixture is pressed into the upper part of the uncured concrete blocks, and then, after hardening of the concrete blocks, natural wood or artificial wood. Since natural wood is fixed on the concrete block via a fixing tool,
Using the fluidity of the uncured concrete block, as described in the above-mentioned claim 9, it is possible not only to easily obtain a firm fixation of the concrete block to the mesh piece, but also to obtain the fluidity of the concrete block. Thus, the fixture can be easily fixed to the concrete block by using the curing, and from such a viewpoint, the production of the civil engineering building unit according to claim 1 can be facilitated.

According to the twelfth aspect of the present invention, the fixing tool comprises a bolt and a nut, and the nut is placed on the upper part of the concrete block such that the receiving port of the nut is exposed from the upper surface of the uncured concrete block. After the concrete block is hardened, a natural or pseudo-natural tree having an insertion hole is placed on the concrete block so as to lie on the upper surface of the concrete block, and then a bolt is inserted into the insertion hole of the natural or pseudo-natural tree. At the same time, since the tip of the bolt is screwed into the nut, there is nothing protruding from the upper surface of the concrete block. Place the pseudo-natural tree on the concrete block, and then roll it so that the insertion hole of the natural tree or the pseudo-natural tree faces the nut. Bolt insertion of, become well be carried out the fixing operation. For this reason, the work of assembling the natural tree or the pseudo natural tree to the concrete block can be reduced.

According to the thirteenth aspect of the present invention, in the civil engineering structure in which a large number of civil engineering building units are laid on the slope, each of the civil engineering building units is formed into a rectangular net-like piece at a peripheral portion of the net-like piece. A plurality of concrete blocks are fixed, and the plurality of concrete blocks are arranged so as to form a rectangular frame on one surface side of the net-like piece. A natural tree or a pseudo-natural tree is placed on the plurality of concrete blocks. A concrete fixed in such a manner that a frame-like frame is formed while corresponding to the rectangular frames of the plurality of concrete blocks.
Each of the concrete block holding units includes a pair of natural trees or pseudo natural trees located at the uppermost position among natural girder-shaped natural trees or pseudo natural trees. The sediment (cover soil, natural stones, etc.) on the surface of the civil engineering structure is sloped by a pair of natural trees or pseudo-natural trees located at the uppermost position because they are arranged in the vertical direction along Can be prevented from flowing down along the line. Moreover,
In this case, since a pair of natural trees or pseudo-natural trees located at the uppermost position are not arranged so as to extend in the vertical direction along the slope, the sediment (cover soil, etc.) on the surface of the civil engineering structure is temporarily set. Even if a part of the natural tree or the pseudo-natural tree located at the uppermost position is exposed to the outside, the exposed surface can be prevented from becoming a sliding surface that extends long in the vertical direction along the slope. Become.

According to a fourteenth aspect of the present invention, in the civil engineering structure in which a large number of civil engineering building units are laid on the slope, each of the civil engineering building units is formed into a rectangular mesh piece at a peripheral portion of the mesh piece. A plurality of concrete blocks are fixed, and the plurality of concrete blocks are arranged so as to form a rectangular frame on one surface side of the net-like piece. A natural tree or a pseudo-natural tree is placed on the plurality of concrete blocks. A concrete fixed in such a manner that a frame-like frame is formed while corresponding to the rectangular frames of the plurality of concrete blocks.
Each of the concrete block holding units is a pair of natural blocks located at the uppermost position of a natural girder or a pseudo natural tree in relation to an adjacent concrete block holding unit. Since the tree or pseudo-natural tree and the pair of natural trees or pseudo-natural trees located under the tree or pseudo-natural tree are arranged alternately, the uppermost position in the adjacent concrete block holding unit is located. A pair of natural trees or pseudo-natural trees located in the lower part and a pair of natural trees or pseudo-natural trees located below the natural tree or pseudo-natural tree located not only vertically but also in the horizontal direction along the slope of the slope (extension of civil engineering structures) Direction), a wall having an enlarged vertical width is formed in cooperation with the wall, and the wall allows the sediment on the surface of the civil engineering structure to flow in all directions. So that can be suppressed. In particular, when used as a subsidence, natural stones and the like can be effectively suppressed from flowing down natural stones and the like downward along the slope of the slope, and natural stones and the like also flow in the direction of flow of river water and the like. It is possible to effectively suppress the loss.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1
Is a revetment as a civil engineering structure.
Civil works are provided on the seawall 2 through a suction prevention sheet 23 (for the sake of convenience, the same elements as those of the seawall 2 are used with different signs only) because the suction prevention sheet 23 is thin. After a large number of concrete block holding units 4 as construction units are laid, adjacent concrete block holding units 4 are connected to each other via a connecting member 24. In FIG. 1, L1
L2 indicates the water level of a river or the like at normal time, and L2 indicates the water level of a river or the like at the time of rising water.

The above-mentioned suction-preventing sheet 23 is for preventing suction of soil and the like. The suction-preventing sheet 23 is laid on the seawall 2 before the concrete block holding unit 4 is laid. It is supposed to be.

As shown in FIGS. 3 to 5, each of the concrete block holding units 4 has a wire mesh 5 as a mesh piece.
In addition, a plurality of concrete blocks 6 are disposed on the front side (one side) of the wire netting 5, and each concrete block 6 is provided.
The lower portion of the metal block 5 is hardened so as to wrap the vicinity of each of the concrete blocks 6 of the wire mesh 5 in the lower portion thereof, and a plurality of natural blocks are placed on the plurality of concrete blocks 6. Log 30 is fixed.

More specifically, the wire mesh 5 is formed in a rectangular shape (in this embodiment, a square shape with a side of about 2 m), and a frame line 7 (in FIG. A frame 8a is provided by crossing a plurality of wires 8 inside the frame 8a.
Are formed. As shown in FIG. 6, each wire 8 has a circular cross section as shown in FIG. 6, and the lower half of each wire 8 or the like has a width (as shown in FIG. , The length in the left-right direction) (the corresponding portions are indicated by arrows in FIG. 6). Of course, instead of such a wire mesh 5, a synthetic resin net, a wire stretched horizontally within the frame 7 to form a mesh 8a or a mesh, a cloth material such as a woven cloth or a non-woven cloth, or a vinyl cloth -The above-mentioned net-like piece may be laminated on the sheet.

As shown in FIG. 3, each of the concrete blocks 6 has a flat upper surface 6a slightly narrower than the lower surface 6b. Besides raw concrete)
Numerous continuous voids 2 extending continuously from the surface toward the inside
A porous material having 5 as well is used.

The lower portion (hardened portion) 9 of each of the concrete blocks 6 is, as shown in FIG.
a to the back side (the other side) of the wire mesh 5
Each of the concrete blocks 6 is firmly held by the wire mesh 5. In this case, the concrete block 6 also has the wire section 8 of the wire mesh 5 that has the circular cross section.
It contributes to making it hard to come off. In other words, the circular shape of the wire rod 8 in the wire mesh 5 has a width (length in the left-right direction in FIG. 6) that gradually increases in the lower half of the wire rod 8 in the upward direction. The concrete block 6 has a physical locking relationship with a wide locking surface. In particular, as shown by the imaginary line in FIG. 6, even if the wrapping of the wire mesh 5 by the concrete block 6 with respect to the wire 8 is not complete, the wire mesh 5 is locked by the locking relationship between the two.
Of the concrete block 6 is secured. Of course, as long as such a function is exerted, it goes without saying that the cross section of the wire 8 may be other than circular.

In each of the concrete blocks 6, in this embodiment, a reinforcing coil (not shown) is inserted. The rebar coil is formed in a coil shape, is disposed so that the axial direction thereof is along the surface of the wire mesh 8, a lower portion thereof is held by the wire mesh 5, and an upper portion thereof is deep in the concrete block 6. I'm stuck.
Thereby, the locking area per unit volume (the locking area between the concrete block 6 and the reinforcing coil) is remarkably increased, and the holding relation of the concrete block 6 to the wire mesh 5 is further strengthened. I have.

In the present embodiment, the plurality of concrete blocks 6 are, as shown in FIGS.
Above, it is arranged along the periphery of the wire mesh 5. As a result, the plurality of concrete blocks 6
A substantially square partition space 33 is to be partitioned.
Nuts 31 are embedded and fixed in the concrete blocks 6 located at four corners of the plurality of concrete blocks 6, respectively. Each nut 31 is provided so that its receiving opening is exposed upward from the upper surface 6a of the concrete block 6. Even if the nut 31 is provided in the concrete block 6, the upper surface 6a is flat. Is maintained.

In the present embodiment, four logs 30 are used, and by using the four logs 30, a cross-girder frame is assembled on the plurality of concrete blocks 6. . That is, each log 30
Has an axial length substantially equal to one side of the wire netting 5, two of which 30a are arranged as a pair on the upper surface 6a of a pair of opposing concrete blocks 6;
The remaining two pieces 30b are formed as a pair on the upper surface 6a of the other opposing concrete block 6 group, and
, And a plurality of logs are to be arranged in the shape of a crossbeam 30a, 30b. Each log 30a (3
0b), a bolt insertion hole (not shown) is formed at each end, and both bolt insertion holes are logs 30a and 30b.
In each overlapping portion with b (near the four corners of the wire mesh 5), a through hole extending vertically is formed. A bolt 32 is inserted into the through hole from above, and the tip of the bolt 32 is screwed to the nut 31. Thus, the plurality of logs 30 are fixed to the concrete block 6 in a cross-girder shape.

The concrete block holding unit 4 is specifically manufactured as follows. First, in order to perform the work with the wire net 5 in a horizontal state, as shown in FIG.
Is placed. In this case, the work surface 11a is preferably a release surface having good releasability, and a release sheet may be laid on the work table 11 to secure the releasability. The wire mesh 5 is slightly separated from the work surface 11a based on the fact that the diameter of the frame wire 7 is larger than the diameter of the internal wire 8 and in the present embodiment, the wire 8 is knitted. Is supposed to be. Reinforcing coils (not shown) are respectively locked (held) on the wire mesh 5 at positions corresponding to the respective concrete blocks 6 to be formed. Are arranged along the surface of the wire net 5.

Next, a formwork 13 for each concrete block 6 is placed on the wire netting 5 while applying one of the above-mentioned reinforcing coils, and in each formwork 13 as shown in FIG. Uncured concrete 12 is placed. And
The nut (insert nut) 31 is inserted into the uncured concrete 12 from above, and the nut 31 is positioned in the uncured concrete block 12 such that its receiving port is exposed to the outside. Is done. As the above-mentioned mold 13, a cylindrical shape narrowing upward is used in consideration of the removal of the mold 13, and the internal space of the mold 13 has the same shape as the shape of the concrete block 6. It has been. Of course, as the mold 13, one obtained by integrating the above molds 13 may be used. As the nut 31, it is preferable to use a bolt 32 of a fixed length so as to be able to cope with a change in the diameter of the log 30 and to increase the length of the female screw in the vertical direction as much as possible from the viewpoint of securing the fixing strength. .

As a result, when the concrete 12 hardens, the concrete block 6 having the above-mentioned shape is formed in the mold 13 and the nut 31 is fixed on the concrete block 6. Moreover, in the uncured stage until the concrete 12 is cured, the uncured concrete 12 passes through the mesh 8a of the wire mesh 5 to the back side (the other side) based on its own weight. It protrudes and wraps around the wire mesh 5 in the area below the concrete block 6. In this case, as described above, the wire 8 region of the wire netting 5 is slightly separated from the work surface 11a, and there is a slight space below the wire 8 region. 12 enters,
The concrete 12 completely encloses the wire netting 5 part. In addition, the outer surface 6b of the uncured concrete 12 that has entered the back side of the wire mesh 5 is formed as a substantially flat surface by the work surface 11a.

The above-mentioned concrete block 6 is manufactured especially when the uncured fluidity is relatively low as in the case of manufacturing a porous concrete block (using cement, aggregate or the like as a material). In the case of using a raw concrete (sand, cement, etc.) and having a relatively good fluidity when uncured, a wire mesh 5 is placed on the work surface 11a from the viewpoint of preventing the occurrence of toro. Before placing
It is preferable to lay a sand layer on the work surface 11a.

The concrete 12 in each mold 13
Is cured, each mold 13 is removed, and the four logs 30 are attached to the upper surfaces 6a of the plurality of cured concrete blocks 6 to obtain the concrete block holding unit 4. In assembling the log 30,
First, among the logs 30, the logs 30a are placed on a pair of opposing concrete blocks 6 respectively, and the insertion holes of the logs 30a are provided with a plurality of concrete blocks 6 respectively.
It faces so as to face the nut 31 at the four corners of the group.

In this case, instead of the nut 31, the bolt 3
It is also conceivable to fix the plant 2 on a concrete block, but in the case of this method, a heavy log 30 is used.
a, the work of passing the insertion hole of the log 30a through the bolt 32 must be performed. As in the present embodiment, the log 30a is temporarily placed on the group of concrete blocks 6, and the log is formed by the group of concrete blocks 6. A large amount of labor is required as compared with a method in which the log 30a is rolled while receiving the weight of the log 30a, and the insertion hole of the log 30a faces the nut 31. Inevitably inferior.

Subsequently, the logs 30b of the logs 30 are placed on another group of the opposing concrete blocks 6 via the above-mentioned pair of logs 30a, and the respective ends of the logs 30b are inserted. A hole is made to face each insertion hole of the log 30a, and a through hole extending in the up-down direction is formed by both the insertion holes.

Subsequently, bolts 32 are inserted into the respective through holes, and the bolts 32 are screwed to nuts 31 fixed to the concrete block 6, respectively.
As a result, the logs 30a and 30b are fixed to the plurality of concrete blocks 6 in a grid pattern as shown in FIG. In this case, in order to prevent the head of the bolt 32 from projecting from the log 30b, the log 30b
Preferably, a recess is formed in the recess so that the head of the bolt 32 fits into the recess.

Return to the seawall 1. Such a concrete
The lock holding unit 4 is, in the present embodiment,
As shown in FIGS. 1 and 2, a log 30 b extends on the seawall slope 2 (suction prevention sheet 23) in the lateral direction (extending direction) of the seawall 2 and the log. 30
It is arranged so that the arrangement direction of “b” is oriented vertically along the seawall 2. Of course, the arrangement of the concrete block holding units 4 may be such that the logs 30a and 30b are staggered in relation to the adjacent concrete block holding units 4. That is, one concrete
The arrangement is such that the log 30a of another concrete block holding unit 4 is located next to the log 30b in the block holding unit 4.

Among the many concrete block holding units 4 laid on the seawall 2, the water level L at normal time
With regard to the concrete block holding units 4 arranged below the first block 1, natural stone 25 generated locally is packed in the compartment space 33 including the frame of the log 30 as a filling material and used as a sink. . As a result, it can be made sufficiently compatible with various aquatic ecosystems.

On the other hand, among the many concrete block holding units 4 laid on the seawall 2, the group of concrete block holding units 4 arranged above the normal water level L1 promotes greening. In order to fill the vegetation soil 26, the vegetation soil 26 is packed in the compartment 33 including the frame of the log 30 as a filling material.
Are planted.

The concrete block holding units 4 arranged above the normal water level L1 include:
Covering soil 20 is used. The covering soil 20 is used as filling soil between the adjacent concrete block holding units 4, and the concrete block holding units 4 packed with vegetation soil 26 are used as the concrete block holding units 4 packed with the natural stone. Used as height-adjusting soil for smooth transition. In the present embodiment, the cover soil 20 is piled up to such an extent that the logs 30b are slightly exposed. Of course, the vegetation soil 26 may also be used as the cover soil 20.

Therefore, in the revetment 1, below the normal water level L 1, four concrete block holding units packed with natural stones are used as a subsidence, so that they can be used in various aquatic ecosystems. Above the normal water level L1, the group of concrete block holding units 4 filled with vegetation soil 26 can be preferable from the viewpoint of promoting greening. On the upper side of the normal water level L1, the revetment 1
Of the earth and sand (cover soil 20, vegetation soil 26, etc.) can be prevented, and when used as a sediment below the normal water level L1, the natural stone 2
5 can be prevented from flowing out. Further, since the logs 30b at the uppermost position of the group of concrete block holding units 4 are not disposed so as to extend in the vertical direction along the revetment slope 2, the covering soil 20 and the like are temporarily lost, Even if the log 30b is exposed, the log 30b does not form a sliding surface extending in the same direction.

Although the embodiments have been described above, the present invention includes the following aspects. As another mode for putting the concrete 12 in the mold 13, the frame is placed on the worktable 11, and the wire mesh 5 is placed on the frame, and the space below the wire 8 region of the wire mesh 5 is made larger (deeper). Then, the wire mesh 5 is completely wrapped by the concrete 12 entering the lower space. The size of each concrete block 6 is such that bending stress does not act on the bending of the wire mesh 5. In this case, it is preferable to consider that the outflow of the covering soil 20 can be prevented by the size of each porous concrete block 6 itself. Use natural wood made of concrete, plastic, etc. instead of natural wood. A nut 31 is fixed to secure the log 30.
Provided on the block 6 as appropriate. A concrete block holding unit 4 in which a plurality of concrete blocks 6 are fixed to a wire netting 5, and nuts 31 are simply buried and fixed above the plurality of concrete blocks 6 as appropriate. The cross-girder shape of the logs 30 or the like is not limited to two logs with four logs 30 or the like, but may be a plurality of logs such as three logs with six logs 30 or the like.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a revetment according to an embodiment.

FIG. 2 is a plan view illustrating a state in which the concrete block holding unit according to the embodiment is laid on a seawall.

FIG. 3 is a perspective view showing a concrete block holding unit according to the embodiment.

FIG. 4 is a plan view showing the concrete block holding unit according to FIG. 3;

FIG. 5 is a front view showing the concrete block holding unit according to FIG. 3;

FIG. 6 is an explanatory diagram showing a relationship between a wire rod of a wire mesh and a concrete block.

FIG. 7 is a view for explaining a manufacturing process of the concrete block holding unit according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seawall 2 Seawall slope 4 Concrete block holding unit 5 Wire mesh 6 Concrete block 8 Wire rod 12 Uncured concrete 20 Cover soil 25 Natural stone 26 Vegetable soil 30 Log 30a Log 30b Log 31 Nut 32 Bolt

Claims (14)

[Claims] 1. A plurality of concrete blocks are fixed to a net-like piece, and the plurality of concrete blocks are arranged on one side of the net-like piece. A natural tree or a pseudo natural tree is placed on the plurality of concrete blocks. A civil engineering building unit, being laid down and fixed. 2. The method according to claim 1, wherein a plurality of the natural trees or the pseudo natural trees are provided, and the plurality of the natural trees or the pseudo natural trees are arranged so as to form a rectangular frame. Unit for civil engineering structures. 3. The civil engineering building unit according to claim 2, wherein a frame is formed in a cross-girder shape by the natural tree or the pseudo natural tree. 4. The civil engineering building unit according to claim 1, wherein the natural tree or the pseudo natural tree is detachably fixed to the concrete block. 5. The plurality of concrete blocks according to claim 2, wherein the plurality of concrete blocks are sequentially arranged so as to be continuous in a lower region of the plurality of natural trees or pseudo-natural trees. -Block is set to form a rectangular partitioned space corresponding to the framework of the plurality of natural trees or pseudo-natural trees, at least the partitioned space is filled with filling material,
A civil construction unit characterized by the above-mentioned. 6. The civil engineering building unit according to claim 5, wherein the filling material is natural stone. 7. The unit for civil engineering construction according to claim 5, wherein the filling material is vegetation soil. 8. A plurality of concrete blocks are fixed to a rectangular net-like piece at a peripheral edge of the net-like piece, and the plurality of concrete blocks are arranged so as to form a rectangular frame on one surface side of the net-like piece. And a fixing tool for fixing an object to be fixed is provided on an upper part of the concrete blocks located at least at four corners of the plurality of concrete blocks. 9. The concrete block according to claim 8, wherein each of the concrete blocks is cured so as to wrap around a position where each of the concrete blocks is located in the net-like piece. A unit for civil engineering construction, wherein a nut as a fixing tool is embedded and fixed on an upper part of the concrete block located at at least four corners while exposing a receiving port of the nut from the upper surface of the concrete block. 10. The civil engineering building unit according to claim 1, wherein the natural tree is a thinned material. 11. A plurality of uncured concrete blocks are arranged on the mesh piece on one surface side of the mesh piece, and then, a fixing tool is pushed into an upper portion of the uncured concrete block, and -A method for manufacturing a unit for civil engineering construction, comprising fixing a natural tree or a pseudo-natural tree on the concrete block via the fixing tool after the hardening of the concrete block. 12. The concrete block upper part according to claim 11, wherein the fixture comprises a bolt and a nut, and the nut is exposed from a top surface of the uncured concrete block. Next, after the concrete block is hardened, a natural tree or a pseudo natural tree having an insertion hole is placed on the concrete block so as to lie on it, and then the natural tree or the pseudo natural tree is inserted into the insertion hole. A method for manufacturing a civil engineering construction unit, comprising inserting a bolt and screwing a tip end of the bolt to the nut. 13. In a civil engineering structure having a large number of civil engineering building units laid on a slope, each of the civil engineering building units fixes a plurality of concrete blocks to a rectangular net-like piece at the periphery of the net-like piece. Then, the plurality of concrete blocks are arranged so as to form a rectangular frame on one side of the net-like piece, and a natural tree or a pseudo-natural tree is formed on the plurality of concrete blocks. It is a concrete block holding unit fixed so as to form a double-girder framework while corresponding to a rectangular frame, and each of the concrete block holding units is located at the uppermost position of a natural girder or pseudo-natural tree. Soil, wherein the arrangement direction of a pair of located natural trees or pseudo-natural trees is disposed so as to extend in the vertical direction along the slope. Construct. 14. A civil engineering structure having a large number of civil engineering building units laid on a slope, wherein each of the civil engineering building units has a plurality of concrete blocks fixed to a rectangular mesh at the periphery of the mesh. Then, the plurality of concrete blocks are arranged so as to form a rectangular frame on one side of the net-like piece, and a natural tree or a pseudo-natural tree is formed on the plurality of concrete blocks. It is a concrete block holding unit fixed so as to form a cross-shaped frame while corresponding to a rectangular frame. Each of the concrete block holding units is in relation to an adjacent concrete block holding unit.
Of the natural girder-like natural trees or pseudo-natural trees, a pair of natural trees or pseudo-natural trees located at the uppermost position, and a pair of natural trees or pseudo-natural trees located thereunder are arranged alternately. Civil engineering structures, which are arranged as follows.