JP2006169860A - Method of producing block for civil-engineering structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a block for constructing a civil-engineering structure, which contributes to further harmonization of the structure with the circumferential natural landscape. <P>SOLUTION: According to the structure of the block, a plurality of natural stones 11 are each partially embedded in a concrete base 10 and protruded from a front surface 10a of the concrete base. The concrete base has a gravel layer 12 laid on the front surface 10a thereof, which exhibits fine irregular surface. Thus the gravel layer 12, in cooperation with the natural stones 11, not only harmonizes the block 9 for the civil-engineering structure with the circumferential natural landscape, but also provides a biotope preferable to the flora and fauna in the nature. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a block for a civil engineering structure, a block component for a civil engineering structure, and a method for manufacturing a block for a civil engineering structure.

As shown in Patent Document 1, some civil engineering building blocks have a concrete base embedded with a plurality of natural stones partially protruding. By laying such a block for civil engineering structures on the construction surface such as a slope and covering the construction surface, it is possible to easily construct a civil engineering structure such as a seawall and harmonize the civil engineering structure with the surrounding natural landscape. Will be able to.
Japanese Patent Laid-Open No. 5-96517

  However, in the block for civil engineering structures, although the natural base can be harmonized with the surrounding natural landscape by using a plurality of natural stones, the concrete base surface is still in a bare state and harmonized with the surrounding natural landscape. However, there are inherent limitations.

This invention is made | formed in view of such a situation, The 1st technical subject is to provide the block for civil engineering structures which can be further harmonized with the surrounding natural scenery.
A second technical problem is to provide a civil engineering building block part used for the civil engineering building block.
The third technical problem is to provide a method for manufacturing a civil engineering structure block for manufacturing the civil engineering structure block.

In order to achieve the first technical problem, the present invention (the invention according to claim 1)
In a block for a civil engineering structure in which a plurality of stones are partially embedded in a concrete base, and each stone protrudes from the surface of the concrete base,
A surface layer is provided on the surface of the concrete base to form a minute uneven surface with respect to the outside.
This is a construction for a civil engineering structure block characterized by this. Preferred embodiments of the first aspect are as described in the second and third aspects.

In order to achieve the first technical problem, in the present invention (the invention according to claim 4),
On the concrete base surface, a gravel layer with gravel as a component is provided over the entire surface.
This is a construction for a civil engineering structure block characterized by this.

In order to achieve the second technical problem, in the present invention (the invention according to claim 5),
The concrete base surface is provided with a gravel layer composed of gravel,
A plurality of recesses for holding a plurality of stones are formed in the gravel layer,
It is set as the block part for civil engineering structures characterized by the above.

In order to achieve the third technical problem, in the present invention (the invention according to claim 6),
A plurality of stones are partially embedded in the concrete base, each stone protrudes from the surface of the concrete base, and the gravel is made into a component in a portion other than the portion where each stone exists on the surface of the concrete base. A method for producing a block for a civil engineering structure provided with a gravel layer,
First, a mixture layer made of a mixture of gravel and sand smaller than the gravel is formed in the mold at the lower part of the mold, and a plurality of stones are partially embedded in the mixture layer. Projecting from the mixture layer,
Next, by applying an external force to the mixture layer, the mixture layer is separated into a sand layer and a gravel layer, and the sand layer is positioned below the gravel layer,
Next, the concrete is filled into the mold from above the mold to make a concrete base in which the stones and the gravel layer are integrated in the mold. The preferred embodiment of claim 6 is as described in claim 8 and below.

In order to achieve the third technical problem, in the present invention (the invention according to claim 7),
A method for producing a block for a civil engineering structure in which a gravel layer having gravel as a constituent element is provided on a surface of a concrete base,
First, in the formwork, a mixture layer made of a mixture of gravel and sand smaller than the gravel is spread at the lower part of the formwork,
Next, by applying an external force to the mixture layer, the mixture layer is separated into a sand layer and a gravel layer, and the sand layer is positioned below the gravel layer,
Next, concrete is filled into the mold from above the mold, and a concrete base in which the gravel layer is integrated is formed in the mold. The preferred embodiment of claim 7 is as described in claim 8.

According to the first aspect of the present invention, the surface layer provided on the concrete base surface forms a minute uneven surface with respect to the outside, so that a natural change is impressed compared to a flat surface. In cooperation with a plurality of stones, the civil engineering structure block can be further harmonized with the surrounding natural landscape.
In addition, it is possible to increase the growth of plants, algae (including spores), the occurrence of moss and facilitate the movement of benthic animals based on the minute uneven surface, and the surroundings of each stone are As a habitat space, it can be made more preferable.

  According to the invention according to claim 2, since the surface layer is formed by a gravel layer having gravel as a constituent element, it is possible to make use of the color and characteristics of gravel (pebbles) as natural stones, The harmony to the surrounding natural landscape and the formation of the habitat of animals and plants according to the first aspect can be specifically achieved.

  According to the invention which concerns on Claim 3, since each stone consists of a natural stone, in cooperation with the fine uneven surface of a surface layer, while being able to further harmonize with the surrounding natural scenery, such a The minute uneven surface that produces the effect can be protected from rolling stones or the like with the fundamentally hard properties of each natural stone.

  According to the invention which concerns on Claim 4, since the gravel layer which used the gravel as a component over the whole concrete base surface is provided, the color and characteristic as a natural stone of gravel (pebbles) In addition to being able to make use of it, it is possible to increase the growth of plants, algae (including spores) and moss based on the minute uneven surface of the gravel layer, and facilitate the movement of benthic animals. The activity on the gravel layer can be activated.

  According to the invention according to claim 5, a gravel layer having gravel as a constituent element is provided on the concrete base surface, and a plurality of recesses for holding a plurality of stones are formed in the gravel layer. If the block parts for the civil engineering structure are prepared, the stones are partially stored in the respective recesses, and the stones are integrated with the inner surfaces of the concave parts, the civil engineering structure according to claim 2 is provided. You will get a block. For this reason, the block component for civil engineering structures used for the block for civil engineering structures concerning Claim 2 can be provided.

According to the invention of claim 6, a mixture layer made of a mixture of gravel and sand smaller than the gravel is formed in the mold at the lower part of the mold, and a plurality of stones are partially formed in the mixture layer Since each stone is placed in a state of projecting from the mixture layer and external force is applied to the mixture layer before filling the concrete into the mold, the mixture layer is based on the external force. Gravel, which is a large particle of each particle, remains on the upper side of the mixture layer, while sand, which is a small particle of each particle, moves to the lower side of the mixture layer, and the mixture layer is divided into a sand layer and a gravel layer. As the layers separate, the gravel layer will be located above the sand layer. For this reason, when concrete is filled into the formwork from above, the concrete wraps the upper part of each stone, and in the gravel layer where the density is smaller (there are many large voids) than the sand layer, Each gravel is spread and retained, while the dense sand layer restricts the passage of the concrete (flow regulation), and each stone and the gravel layer are integrated with the concrete (concrete base) in the formwork. become. As a result, if the concrete in the formwork is hardened and then removed, the sand layer remains in the formwork, while the concrete base in which each stone and gravel layer are integrated is taken out from the formwork. The civil engineering building block according to claim 2 can be obtained.
In this case, an external force is generally exerted on the mixture of sand and gravel, and the sand and gravel layers are separated by utilizing the difference in size and weight between the two. The characteristics (density) of the sand layer and the characteristics (density) of the gravel layer are used skillfully. In other words, the density of the gravel layer is small, so that the concrete can easily enter, and the sand layer located below the gravel layer is made of the high density of the concrete. It is difficult to enter. For this reason, a gravel layer can be accurately integrated with a concrete base using a common substance and phenomenon.

According to the invention which concerns on Claim 7, after making into the state which spread | laid the mixture layer which consists of a mixture of gravel and sand smaller than the gravel in the formwork in the formwork lower part, into the formwork Before the concrete is filled, external force is applied to the mixture layer. Based on the external force, large particles of the particles in the mixture layer remain on the upper side of the mixture layer, while small particles in each particle. Sand moves to the lower side of the mixture layer, and the mixture layer is separated into a sand layer and a gravel layer, and the gravel layer is located above the sand layer. For this reason, when concrete is filled into the formwork from above, in the gravel layer where the density is smaller than that of the sand layer (there are many large voids), the concrete spreads around the gravel and holds each gravel. On the other hand, in the sand layer having a high density, the passage of the concrete is restricted (flow restriction), and the gravel layer is integrated with the concrete (concrete base) in the formwork. Thus, if the concrete in the mold is cured and then demolded, the sand layer remains in the mold, while the concrete base integrated with the gravel layer is taken out from the mold. It is possible to obtain a civil engineering structure block according to the above.
In this case, an external force is generally exerted on the mixture of sand and gravel, and the sand and gravel layers are separated by utilizing the difference in size and weight between the two. The characteristics (density) of the sand layer and the characteristics (density) of the gravel layer are used skillfully. In other words, the density of the gravel layer is small, so that the concrete can easily enter, and the sand layer located below the gravel layer is made of the high density of the concrete. It is difficult to enter. For this reason, a gravel layer can be accurately integrated with a concrete base using a common substance and phenomenon.

  According to the eighth aspect of the invention, separating the mixture layer into the sand layer and the gravel layer and positioning the sand layer below the gravel layer can sprinkle the mixture layer. Therefore, the sand particles with a small particle diameter move on the lower side of the gravel with a large particle diameter on the flow flowing down in the mixed layer in the mold, and the mixed layer is separated from the sand layer. The sand layer is separated from the gravel layer, and the sand layer is located below the gravel layer. For this reason, it is possible to separate the mixture layer into a sand layer and a gravel layer and to place the sand layer below the gravel layer by a very simple and common method of watering. .

  According to the invention according to claim 9, as the mold, one having an upper and lower opening is used, and the mold is placed on the support base having the drainage hole via the water-permeable sheet, The water sprayed on the mixture layer in the mold will be drained through the water permeable sheet and the drainage holes of the support base, and the sand of the mixture layer is placed in the lower region of the mixture layer on the continuous water. It can be collected (moved) accurately.

  According to the invention of claim 10, separating the mixture layer into a sand layer and a gravel layer and positioning the sand layer below the gravel layer gives vibration to the mixture layer. Therefore, based on the vibration, sand particles having a small particle size move downward compared to gravel having a large particle size, and the mixed layer is separated into a sand layer and a gravel layer, and the sand layer Is located below the gravel layer. For this reason, it is possible to separate the mixture layer into a sand layer and a gravel layer and to place the sand layer below the gravel layer by a very simple and common method of vibration. .

  According to the invention of claim 11, when demolding the concrete base from inside the mold, the concrete base is lifted in the upper region of the mold so that the gravel layer faces downward, and in this state Since an external force is applied to the gravel layer integrated with the concrete base, only the gravel remains firmly fixed to the concrete base, and those with a weak integrated force with respect to the concrete base remain in the mold. Will be detached. For this reason, the integrated strength of the gravel layer with respect to the concrete base can be secured to a predetermined level or more, and the detached gravel can be recovered in the mold and reused again.

  According to the invention of claim 12, since external force is applied to the gravel layer integrated with the concrete base by supplying high-pressure water, it is integrated with the concrete base even in an unstable lifting state. Thus, an external force can be accurately applied to the crushed gravel layer, and the same effects as those of the eleventh aspect can be obtained specifically and accurately.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 12 show a first embodiment. In the revetment structure 1 according to the first embodiment, as shown in FIG. 1, the construction surface (slope) 2 is inclined so as to extend upward from the river 5 side toward the land side. The foundation block 3 is arranged at the lower end position of the construction surface 2 so as to extend in the flow direction of the river water (perpendicular to the paper surface), and the top end block 4 is arranged at the upper end position of the construction surface 2 in the direction of the river water flow. They are arranged so as to extend in the direction perpendicular to the plane of the drawing.

  As shown in FIG. 1, a laying sheet 8 is laid on the construction surface 2 as a sucking prevention sheet or a grassproofing root sheet. The laying sheet 8 has a function (strength) and a herbicidal function to prevent the roots of the plant from growing into the ground, while preventing water and sand from being washed away, while ensuring water permeability and air permeability. In order to exert its function, for example, a long-fiber nonwoven fabric such as polyester is used as the laying sheet 8.

  On the construction surface 2, as shown in FIGS. 1 to 3, a plurality of civil engineering building blocks 9 are laid through the laying sheet 8 mainly for the purpose of exerting a revetment function. The plurality of civil engineering structure blocks 9 are arranged on the revetment surface and cover almost the entire construction surface (laying sheet 8) 2.

  In addition, in FIG. 1, although the civil engineering building block 9 group is shown in a different state on the lower half and the upper half of the construction surface 2, both of them use the same civil engineering building block 9. In order to facilitate understanding of the state of the building block 9, for convenience, the state in which the plant 6 is partially grown is shown for the upper half civil engineering building block 9 group. Each of these contents will be described in detail later.

As shown in FIGS. 2 to 4, each civil engineering structure block 9 includes a concrete base 10, natural stones 11 as a plurality of stones, and a gravel layer 12 as a surface layer. The concrete base 10 is formed in a substantially square shape in plan view under a certain thickness. Specifically, the thickness is about 130 mm, and one side of the square is about 1000 mm. The peripheral surface of the concrete base 10 is cornered at its four corners to form square surfaces 13, and each of the square surfaces 13 is in a parallel state with respect to the diagonal arrangement. Yes. Further, the concrete base 10 is formed with recesses 14 on the peripheral surface where each side of the square shape is located. Each of the recesses 14 is formed at a substantially central portion in the extending direction of each side so that a peripheral surface portion thereof is retracted inward. Each of the recesses 14 is a length in the extending direction of each side. The width interval which is the height is supposed to be narrowed toward the inside.
In addition, the chamfering is given to the upper surface peripheral part of the concrete base 10, The chamfering part is shown with the code | symbol 34. FIG.

  As shown in FIGS. 2 to 4, the plurality of natural stones 11 are provided on the concrete base 10 so as to protrude from the surface 10 a of the concrete base 10. As each natural stone 11, for example, a natural stone having a size of about 10 to 30 cm is used, and about 2/3 of the natural stone 11 is embedded in the concrete base 10 and the remaining about 1/3 (the upper part) : About 50 mm) protrudes upward from the concrete base surface 10a. The upper parts of the natural stones 11 are uniformly arranged on the concrete base surface 10a, and are separated to some extent from the other natural stones 11 in consideration of aesthetics.

  As shown in FIGS. 2 to 4, the gravel layer 12 is provided on the surface 10 a of the concrete base 10. In this embodiment, the gravel layer 12 is formed in a layer shape with gravel (pebbles) 12a of 10 mm or less, and the gravel layer 12 is provided on the concrete surface 10a portion where the plurality of natural stones 11 do not exist. ing. Each gravel 12a of the gravel layer 12 is held on the surface 10a portion of the concrete base 10, and based on each gravel 12a, a minute uneven surface is formed on the surface of the gravel layer 12.

  As shown in FIGS. 3 and 4, each corner surface 13 of the concrete base 10 is provided with a connecting portion 15 so as to protrude. The connecting portion 15 is formed in a substantially U shape, and a connecting coil 16 (FIG. 5) as a connecting tool is connected to the connecting portion 15 to connect to the connecting portion 15 of another concrete base 10. Reference) can be linked. In the present embodiment, as shown in FIGS. 3 and 4, the two connecting portions 15 projecting from the oppositely disposed square surfaces 13 are integrally connected by a connecting line portion 17, and the connecting line portion In the concrete base 10, 17 is arranged so as to extend between the opposing corner surfaces 13.

As shown in FIG. 2, such a civil engineering building block is arranged such that each side abuts against the civil engineering building block 9 that is adjacent on the laying sheet 8 (construction surface 2). As shown in FIG. 5, at the corners of the civil engineering structure block 9, the corner surfaces 13 of the four civil engineering construction blocks 9 including the same form a partitioned space 18, and the four civil engineering structures are formed in the partitioned space 18. The connecting portion 15 of the building block 9 is to be arranged. The four connecting portions 15 are integrated by a connecting coil 16, and the respective civil engineering building blocks 9 are connected to each other.
In addition, each adjacent civil engineering structure block 9 is configured such that the recess 14 of each civil engineering structure block 9 cooperates to form a partitioned space 19, and soil is contained in each partitioned space 19. The plant 6 is to be grown after being introduced.

  In addition, about the lower part of the construction surface 2, after laying the said block 9 for civil engineering structures, it is backfilled and a floor surface (river bed etc.) is formed in the upper side.

Therefore, in the revetment structure 1, since the surface 10a layer provided in each concrete base surface 10a forms the fine uneven surface with the gravel layer 12, taking advantage of the color and characteristic as the natural stone 11 of the gravel 12a, A natural change can be impressed compared with a flat surface, and the block 9 for civil engineering structure can be harmonized with the surrounding natural scenery in cooperation with the plurality of natural stones 11.
Moreover, based on the minute uneven surface of the gravel layer 12, it is possible to increase the growth of plants, algae (including spores) and moss and facilitate the movement of benthic animals. The area around 11 can be made more preferable as a habitat for animals and plants.

Next, a method for manufacturing the civil engineering structure block 9 will be described.
First, as shown in FIG. 6, a water permeable sheet 21 is laid on the support base 20, and the mold 23 is placed on the water permeable sheet 21.
The support 20 has a drain hole (not shown) in the upper part 20a. Even if water is supplied to the upper part 20a of the support 20, the water is drained downward. It is supposed to be. Specifically, the support base 20 has the same configuration as a so-called pallet for cargo handling, and the fork portion of the forklift is inserted into the support base 20 between the upper part 20a and the lower part 20b. Fork portion insertion port 22 is provided, and at the upper portion 20a thereof, a slit is formed as the drainage hole by using a constituent material so that the upper portion 20a faces the fork portion insertion port 22. Abbreviation) is formed.
As the water permeable sheet 21, like the laying sheet 8, a sheet having air permeability and water permeability and a function of regulating passage of earth and sand is used.
As the formwork 23, in order to form the concrete base 10, one having a square shape in a plan view in which one side is about 1000 mm and whose upper and lower surfaces are opened is used. The opening of the lower surface 20b of the mold 23 is to be covered with a water permeable sheet 21 when placed on the support base 20, and at that time, the water permeable sheet 21 constitutes the bottom surface of the mold 23. Become.

Next, as shown in FIG. 7, a mixture layer 25 composed of gravel 12 a and sand 24 a smaller than the gravel 12 a is formed in the mold 23 at the lower part of the mold 23, and A plurality of natural stones 11 are partially embedded so that each natural stone 11 protrudes from the mixture layer 25.
In this case, after arranging a plurality of natural stones 11 in the mold 23, the mixture layer 25 composed of gravel 12a and sand 24a may be formed in the lower part of the mold 23, or the mixture layer 25 may be formed in the mold 23. After forming in the inner and lower parts, each natural stone 11 may protrude from the mixture layer 25 so that a part of each natural stone 11 is embedded in the mixture layer 25.

Next, as shown in FIG. 7, water is sprayed to apply an external force to the mixture layer 25 in the mold 23. This is because the mixture layer 25 is separated into the sand layer 24 and the gravel layer 12 and the sand layer 24 is located below the gravel layer 12.
The water spray supplies water 27 to the mixture layer 25 through a normal supply hose 26. The water 27 is formed on the mixture layer 25, the water-permeable sheet 21, and the upper portion of the support base 20, as shown in FIG. It is to be drained to the outside through 20a (drain hole (slit)).
In this case, when the water 27 is supplied to the mixture layer 25, the sand 24a having a diameter smaller than that of the gravel 12a moves on the flow side of the water 27, but the gravel 12a has a diameter of sand 24. Therefore, it is restricted that they collide with each other and flow downward, and the sand layer 24 is positioned below the gravel layer 12 as shown in FIG. For this reason, in the gravel layer 12, the porosity is increased while forming relatively large voids, and in the sand layer 24, the porosity is reduced (the density is increased) because the sand 24a is considerably smaller than the gravel 12a.

Next, as shown in FIG. 9, concrete 28 is filled into the mold 23 from the upper side of the mold 23. This is because the concrete base 10 is formed by filling the space portion of the formwork 23 with the concrete 28.
In this case, since the porosity of the gravel layer 12 is increased with a relatively large gap and the sand layer 24 is in a dense state, the concrete 28 enters the gravel layer 12 as shown in FIG. The flow is stopped by 24, and each gravel 12 a of the gravel layer 12 is held by the concrete 28. In FIG. 9, reference numeral 32 denotes a shovel.

Next, as shown in FIG. 11, the mold 28 is removed after the concrete 28 in the mold 23 is hardened. In this demolding, since the concrete 28 cannot enter the sand layer 24, the integrated material 29 of the gravel layer 12 and the concrete base 10 is demolded.
At the time of demolding, the integrated object 29 is lifted while the gravel layer 12 side is directed downward for a while. In the lifted state, the high pressure water 33 is used as an external force for the gravel layer of the integrated object 29. 12 is given. The gravel 12a integrated with a weak integration force with respect to the surface 10a of the concrete base 10 is removed, and the gravel layer 12 is firmly integrated with the surface 10a of the concrete base 10 (constant integrated strength) This is to secure only the above. In this case, the lifting state of the integrated object 29 is maintained in the upper region of the mold 23. This is because the sand 24 removed by the high-pressure water 27 is received in the mold 23 (support base 20) to facilitate the collection of the sand 24.

  Thereafter, as shown in FIG. 12, the integrated object 29 is placed in a predetermined position with the gravel layer 12 side inverted so that the block 9 for civil engineering structure is obtained.

  FIG. 13 shows a second embodiment, FIG. 14 shows a third embodiment, and FIG. 15 shows a fourth embodiment. In each of the embodiments, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

In the second embodiment shown in FIG. 13, a gravel layer 12 is integrally provided on the entire surface 10 a of the concrete base 10. Even in the civil engineering unit according to this embodiment, the color and characteristics of the gravel 12a (pebbles) as natural stones can be utilized, and the surrounding natural scenery can be harmonized.
Further, on the surface 10a of the gravel layer 12, a minute uneven surface and a minute void can be obtained, so that the formation of plants and algae (including spores) and the occurrence of moss can be enhanced, and the bottom The movement of the live animal can be facilitated and the activity on the gravel layer 12 can be activated.

The third embodiment shown in FIG. 14 shows a part 30 of the civil engineering structure block 9 for manufacturing the civil engineering structure block 9 by a method different from the manufacturing method according to the first embodiment. A part 30 of the block 9 for civil engineering structure has a plurality of recesses 31 for storing a part of the natural stone 11 on the surface 10a of the concrete base 10, and the concrete base excluding each recess 31 is formed. The gravel layer 12 is integrally provided on the surface 10a. The parts 30 of the civil engineering building block 9 are prepared by introducing an adhesive, concrete or the like (not shown) into each of the recesses 31 and manufacturing a part of the natural stone 11 (total About 2/3) is stored, and each natural stone 11 is fixed to the concrete base 10. Thereby, a part of each natural stone 11 protrudes from the surface 10a of the concrete base 10, and the civil engineering building block 9 in which the gravel layer 12 is integrally provided on the surface 10a of the concrete base 10 is manufactured. become.
In the third embodiment, the recess 31 is formed with respect to the gravel layer 12 and the concrete base. However, when the gravel layer 12 is thick, the recess 31 may be formed only in the gravel layer 12. .

  In the fourth embodiment shown in FIG. 15, a part of the recesses 14 in the peripheral edge of the concrete base 10 is formed in a relatively large arc shape. Thereby, when the civil engineering building block 9 using the concrete base 10 is laid on the construction surface 2 (laying sheet 8), a large circular partition space 19 is formed between the adjacent concrete bases 10. As a result, the soil can be thrown into the partition space to grow the plant.

Although the embodiment has been described above, the present invention includes the following aspects.
(1) As a stone, in addition to the natural stone 11, use a pseudo stone or the like.
(2) The present invention is not limited to the case where the revetment 1 in the river 5 is targeted, but the present invention is also applied to the lake 27, a seawall revetment, and the like.
(3) In order to separate the mixture layer 25 into the sand layer 24 and the gravel layer 12 and position the sand layer 24 below the gravel layer 12, a vibrator or the like is used as an external force imparting means, and the vibration caused by the vibrator or the like is mixed. Giving to layer 25.
(4) Crushing ceramics, roof tiles, slag, glass or the like to 10 mm or less in a single or composite manner, and forming a surface layer using it as a component.

  It should be noted that the object of the present invention is not limited to what is explicitly described, but includes provision of what is substantially preferable or corresponding to what is described as an advantage.

Explanatory drawing explaining the bank protection structure which concerns on 1st Embodiment. The perspective view which shows the laying state of the block for civil engineering structures which concerns on 1st Embodiment. The perspective view which shows the block for civil engineering structures which concerns on 1st Embodiment. The longitudinal cross-sectional view which shows the block for civil engineering structures which concerns on 1st Embodiment. Explanatory drawing explaining the connection state of each block for civil engineering structures planarly. Explanatory drawing explaining the manufacturing process of the block for civil engineering structures which concerns on 1st Embodiment. Explanatory drawing explaining the process following FIG. Explanatory drawing explaining the change state of the mixture layer after watering. Explanatory drawing explaining the process following FIG. Explanatory drawing explaining the relationship of the gravel layer, the sand layer, and concrete in the process shown in FIG. Explanatory drawing explaining the process of following FIG. Explanatory drawing explaining the process following FIG. The perspective view which shows the block for civil engineering structures which concerns on 2nd Embodiment. The longitudinal section explaining the block for civil engineering structures concerning a 3rd embodiment. The top view explaining the block for civil engineering structures which concerns on 4th Embodiment.

Explanation of symbols

1 Revetment structure 9 Block for civil engineering structure 10 Concrete base 10a Concrete base surface 11 Natural stone (stone)
12 Gravel layer (surface layer)
12a Gravel 20 Support base 21 Permeable sheet 23 Formwork 27 Water 28 Concrete 29 Integrated 31 Recess 33 High pressure water

Claims (12)

In a block for a civil engineering structure in which a plurality of stones are partially embedded in a concrete base, and each stone protrudes from the surface of the concrete base,
A surface layer is provided on the surface of the concrete base to form a minute uneven surface with respect to the outside.
This is a block for civil engineering structures. In claim 1,
The surface layer is formed by a gravel layer having gravel as a constituent element,
This is a block for civil engineering structures. In claim 1 or 2,
Each stone is made of natural stone,
This is a block for civil engineering structures. On the concrete base surface, a gravel layer with gravel as a component is provided over the entire surface.
This is a block for civil engineering structures. The concrete base surface is provided with a gravel layer composed of gravel,
A plurality of recesses for holding a plurality of stones are formed in the gravel layer,
Block parts for civil engineering structures characterized by that. A plurality of stones are partially embedded in the concrete base, the stones protrude from the surface of the concrete base, and the gravel is used as a component in a portion other than the portion where the stones exist on the surface of the concrete base. A method for producing a block for a civil engineering structure in which a gravel layer is provided,
First, a mixture layer made of a mixture of gravel and sand smaller than the gravel is formed in the mold at the lower part of the mold, and a plurality of stones are partially embedded in the mixture layer to form each of the stones. Projecting from the mixture layer,
Next, by applying an external force to the mixture layer, the mixture layer is separated into a sand layer and a gravel layer, and the sand layer is positioned below the gravel layer,
Next, concrete is filled into the mold from above the mold, and a concrete base is formed in which the stones and the gravel layer are integrated in the mold.
The manufacturing method of the block for civil engineering structures characterized by the above-mentioned. A method for producing a block for a civil engineering structure in which a gravel layer having gravel as a constituent element is provided on a surface of a concrete base,
First, in the formwork, a mixture layer made of a mixture of gravel and sand smaller than the gravel is spread at the lower part of the formwork,
Next, by applying an external force to the mixture layer, the mixture layer is separated into a sand layer and a gravel layer, and the sand layer is positioned below the gravel layer,
Next, concrete is filled into the mold from the upper side of the mold to make a concrete base in which the gravel layer is integrated in the mold.
The manufacturing method of the block for civil engineering structures characterized by the above-mentioned. In claim 6 or 7,
Separating the mixture layer into a sand layer and a gravel layer and positioning the sand layer below the gravel layer is to sprinkle the mixture layer.
The manufacturing method of the block for civil engineering structures characterized by the above-mentioned. In claim 8,
As the mold, one having an upper and lower opening is used,
The mold is placed on a support base having a drain hole via a water-permeable sheet,
The manufacturing method of the block for civil engineering structures characterized by the above-mentioned. In claim 6 or 7,
Separating the mixture layer into a sand layer and a gravel layer and positioning the sand layer below the gravel layer is to give vibration to the mixture layer.
The manufacturing method of the block for civil engineering structures characterized by the above-mentioned. In claim 6 or 7,
Upon demolding the concrete base from the mold, the concrete base was lifted in the upper region of the mold with the gravel layer facing downward, and in that state, the concrete base was integrated with the concrete base. Apply external force to the gravel layer,
The manufacturing method of the block for civil engineering structures characterized by the above-mentioned. In claim 11,
Giving external force to the gravel layer integrated with the concrete base is performed by supplying high-pressure water.
The manufacturing method of the block for civil engineering structures characterized by the above-mentioned.

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