JPH11280040A - Civil engineering structure, unit for civil engineering structure, and construction method for civil engineering structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a civil engineering structure capable of holding the desired strength and stability thoroughly immediately after its construction (completion) even if it is mainly made of soil. SOLUTION: Many units for civil engineering structure 3 in which soil 4 is solidified like a thick plate by agar are prepared, and many units for civil engineering structure 3 are spread on a slope 2 thoroughly. At the initial time of construction, flow-out of soil 4 is prevented by the units for civil engineering structure 3, and after that, trees and plants grow to hold the soil based on their roots and prevent flow-out of the soil for the reduction of solidifying function of the soil in the unit for civil engineering structure 3.

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, a civil engineering building unit, and a method for constructing a civil engineering structure.

2. Description of the Related Art In recent years, it has been desired to use only soil or the like as a natural material without using concrete or the like as civil engineering structures such as seawalls, in consideration of a growth environment (natural environment) of aquatic organisms and plants. It is rare.

[0003]

However, in the above civil engineering construction, even if the construction is completed, it is unstable until the plants grow roots and the roots hold the soil particles. The civil engineering structure is in a state (unstable period), and during the unstable period, the soil constituting the civil engineering structure may be washed away by rainwater, river water, or the like, and may be damaged. For this reason, it is recognized that a civil engineering structure made of only natural materials such as soil is preferable for a natural environment, but in reality, it is not easy to maintain such a civil engineering structure as desired.

[0004] The present invention has been made in view of the above-mentioned circumstances, and the first technical problem is that even if it is mainly made of only soil, the desired strength and stability are consistently obtained immediately after construction (completion). It is an object of the present invention to provide a civil engineering structure capable of maintaining sex. A second technical problem is to provide a civil engineering structure unit used for the civil engineering structure. A third technical problem is to provide a method for manufacturing the civil engineering structure.

[0005]

Means for Solving the Problems In order to achieve the first technical object, the invention according to claim 1 is characterized in that surface soil is solidified by a decomposable binder. It has a construction of civil engineering structure.

[0006] A preferred embodiment of the first aspect is the second aspect.
6, 17, 18, and 19.

[0007] In order to achieve the second technical object, the invention according to claim 7 is characterized in that the soil is solidified into a thick plate with a degradable binder, for a civil engineering structure. It is configured as a unit.

[0008] In a preferred embodiment of the present invention, claim 8
To 13, 17, 18, and 19.

In order to achieve the third technical object, in the invention of claim 14, a soil is mixed with a degradable binder to form a surface soil, and the surface soil is combined with the degradable binder. Before the agent joins the soils, the agent is laid on a slope to provide a construction method for a civil engineering structure.

[0010] In order to achieve the third technical object, according to the invention of claim 15, a large number of civil engineering building units in which the soil is solidified into a thick plate with a degradable binder are prepared, A construction method of a civil engineering structure, characterized in that the plurality of civil engineering building units are laid evenly on a slope.

A preferred embodiment of the present invention is as described in claims 16 to 19.

[0012]

According to the first aspect of the present invention, since the surface soil is solidified by the degradable binder, the construction is completed, and thereafter, the plants grow roots, and the roots hold the soil particles. Until then (conventional instability period), the solidified topsoil layer will prevent runoff of soil below the topsoil layer. On the other hand, degradable binders, over time,
Contrary to the growth of the plant, the plant is decomposed and disappears, and finally, the civil engineering construction is made of natural materials consisting only of soil and plants, and is in a state closest to nature. For this reason,
Construction (completed) even if it consists mainly of soil
Immediately after that, it is possible to provide a civil engineering structure capable of maintaining desired strength and stability consistently.

According to the second aspect of the present invention, the surface soil is formed by laying a large number of civil engineering building units evenly on the slope, and each civil engineering building unit slabs the soil with a degradable binder. The civil engineering structure according to claim 1 can be obtained only by laying each civil engineering building unit on the slope, because the civil engineering structure is configured to be solidified into a shape. Can be provided.

According to the third aspect of the present invention, the flexible sheet body is included in the civil engineering building unit as a reinforcing member while a part of the flexible sheet body is projected outside. Therefore, not only can the civil engineering structure unit itself be reinforced with the flexible sheet member, but also a part (projection) of the flexible sheet member can be used as a connecting portion, and the strength and stability can be improved. From the viewpoint of improving the performance, the adjacent civil engineering building units can be connected to each other, the flexible sheet member, and the slope.

According to the fourth aspect of the present invention, since the protruding portion of the flexible sheet member is fixed to the slope by the connecting member, it is possible to improve the holding of the civil engineering building unit on the slope. Immediately thereafter, the stability and strength of the civil engineering structure can be maintained in an extremely high state.

According to the fifth aspect of the present invention, since the plant growth agent is mixed in each civil engineering construction unit, the growth of the plant can be promoted, and the soil based on the root of the plant can be retained. And the stability and strength can be improved at an early stage.

According to the invention of claim 6, since the seeds of the plant are mixed in each unit for civil engineering construction, the seeds generally do not depend on the seeds contained in the soil and the flying seeds. It will be better and the plant will be able to grow reliably. Therefore, also in this case, stability and strength can be improved at an early stage.

According to the invention of claim 7, since the soil is solidified in a thick plate shape with the degradable binder, the unit for civil engineering construction is simply laid evenly on the slope,
The civil engineering structure according to the above-described claim 2 can be obtained, and the workability of the civil engineering structure having the surface soil solidified can be improved.

According to the eighth aspect of the present invention, since the reinforcing material is contained in the inside, the civil engineering building unit can be reinforced, and the strength (handlability) for rough handling can be improved. At the same time, the strength of the civil engineering structure constructed by the civil engineering building unit can be improved.

According to the ninth aspect of the present invention, since the reinforcing material is fibrous, the fibrous reinforcing material can be substantially uniformly dispersed therein, and the strength of the civil engineering building unit can be partially reduced. Rather, it can be improved overall.

According to the tenth aspect of the present invention, since the reinforcing member is a flexible sheet body and a part of the flexible sheet body is protruded to the outside, the civil engineering structure can be formed by the flexible sheet body. Not only can it be reinforced, but also a part (projection) of the flexible sheet can be used as a grip for transporting to the construction site and a connecting part for increasing the holding strength to the slope.

According to the eleventh aspect of the present invention, since the flexible sheet is a rectangular net-like piece, and the four corners of the mesh-like piece are projected outward, the mesh at the four corners is used. hand,
It is possible to easily perform a gripping operation at the time of transport and a connecting operation for increasing holding strength on a slope.

According to the twelfth aspect of the present invention, since the plant growth agent is mixed in the inside, the plant can be grown by the plant growth agent only by laying the civil construction unit on the slope. Can be promoted,
Thus, the stability and strength of the civil construction can be improved at an early stage by maintaining the soil based on the roots of the plant earlier.

According to the thirteenth aspect of the present invention, since the seeds of the plant are mixed therein, the plant can be surely removed without depending on the seeds generally contained in the soil and the flying seeds. It is possible to grow and the stability and strength of the civil engineering structure can be improved at an early stage.

According to the fourteenth aspect of the present invention, the soil is mixed with a degradable binder to form a surface soil, and the surface soil is placed on a slope before the degradable binder bonds the soil to each other. Since the laying is performed, the surface soil can be easily laid on the slope, and after the surface soil is solidified, the civil engineering structure according to claim 1 can be obtained.

According to the fifteenth aspect of the present invention, a large number of civil engineering building units in which the soil is solidified into a thick plate with a degradable binder are prepared, and the numerous civil engineering building units are laid evenly on the slope. Therefore, by the method,
The civil engineering structure according to claim 2 can be obtained.

According to the sixteenth aspect of the present invention, each civil engineering building unit includes, as a reinforcing material, a flexible sheet body while partially projecting the flexible sheet body to the outside. Utilizing the protruding portion of the flexible sheet body, by using the connecting member, the adjacent civil engineering building units are connected to each other and the respective civil engineering building units are connected to the slopes. The construction unit can be firmly held on the slope, and the civil construction can be constructed stably and firmly.

According to the seventeenth aspect of the present invention, since the flexible sheet body has decomposability, the flexible sheet body disappears with the passage of time, and the initial construction time is reduced. In the future, it will be possible to construct civil engineering structures that are closer to nature while improving strength.

According to the eighteenth aspect of the present invention, since the degradable binder is set so as to secure the solidifying function of the soil at least during a period during which the plants grow in the soil, Based on the solidification function, during the initial construction until the plant grows to the predetermined state, it will be possible to reliably prevent the soil from flowing out, and to ensure the stability and strength of the civil construction at the beginning of the construction Become.

According to the nineteenth aspect of the present invention, since the degradable binder is agar, the effects of the first to eighteenth aspects can be specifically obtained by using the agar. .

[0031]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a first embodiment. In the first embodiment, reference numeral 1 denotes a river revetment as a civil engineering structure, and the river revetment 1 has a large number of civil engineering construction units 3 laid evenly on a slope 2 (including a butt). Many civil engineering building units 3
It mainly constitutes the surface soil.

In each of the civil engineering building units 3, as shown in FIGS. 1 to 3, the soil 4 has a rectangular thick plate shape (for example, 0.5 to 1.0 m long, 0.5 to 1.0 m wide, Solidified to a thickness of 0.03 to 0.10 m)
Are formed. As the soil 4, besides pure soil, earth and sand, soil which also contains stones and the like as usually seen here and there can be used.
Plant growth is allowed as far as possible. The solidified product 5
Are formed by binding the soils 4 with agar as a degradable binder. As the agar, a normal one using a raw material such as Amakusa is used, and this agar is finally decomposed and eliminated by bacteria and the like in the soil. Specifically, in the production of the solidified material 5 (the civil engineering construction unit 3), the agar is mixed with water, brought to a boil, mixed with the soil 4, and put into a mold. Then, when the agar binds the soil, the molded product in the mold is taken out from the mold as a solid 5 in the form of a rectangular thick plate.

In the present embodiment, the solidified product 5
In addition, a mesh net (degradable fiber, degradable plastic, iron, etc.) 6 is included as a reinforcing material. Net 6
Is formed in a rectangular shape having substantially the same size as the solidified material 5, and by removing four corners of the solidified material 5,
The corners 6a of the four corners of the net 6 project outward from the four corners of the solidified material 5, respectively.

In the present embodiment, as shown in FIG. 3, a plant growth agent 11 and a plant seed 12 are mixed in the solidified material 5. A fertilizer, a water retention agent, or the like is used as the plant growth agent 11, and a plant seed 12 that is suitable for vegetation on a river bank and that is preferable as a root holding soil particles is selected. In this case, agar also functions as a water retention agent to some extent. The plant growth agent 11 and the seed 12 of the plant in FIG. 3 are conceptually shown.

Unit 3 for civil engineering structures on the slope 2
As shown in FIG. 2, as shown in FIG. 2, four sides of each civil engineering building unit 3 are arranged such that each side of each civil engineering building unit 3 is adjacent to each side, and at each location, four civil engineering building units For every three, the corners 6a of each of the four corners are to be gathered. As shown in FIGS. 2 and 3, each corner 6 a of each of the four civil engineering building units 3 is connected to each other by driving an anchor 7 as a connecting member into the slope 2, and is connected to the slope 2. It is to be linked.
In FIG. 3, the hook portion above the anchor 7 is simplified, and only one of the four hook portions is shown, and the other hook portions are omitted.

An adjusting soil 8 is provided at the joint of the civil engineering building units 3 as required. The adjusting soil 8 covers or fills a joint portion (particularly, each corner portion 6a) of each civil engineering building unit 3, so that the joint portion is hardly visible in appearance. In this case, of course, soil covering may be performed on each civil engineering structure unit 3.

In constructing such a river revetment 1, a large number of the above-mentioned civil engineering building units 3 are first prepared, and each of the civil engineering building units 3 is transported to the slope 2 to be placed on the slope 2. Laying so as to cover evenly. And
Using the anchor 7, each civil engineering building unit 3 is connected to each other, and each civil engineering building unit 3 is connected to the slope 2, and the joining portion between the civil engineering building units 3 is hardly seen by the adjustment soil 8. Finish and finish construction.

At the beginning of construction, such a river revetment 1 is laid on the slope 2 so as to cover a large number of civil engineering construction units 3 (solidified materials 5). The civil construction unit 3 prevents the soil on the lower side from being washed away by rainwater, river water 9 and the like. In addition, the plants grow with the passage of time, and the roots of the plants retain the soil, so that the loss of the soil is more reliably prevented. In particular, in this embodiment, since the seed 12 of the plant and the plant growth agent 11 are mixed in each civil engineering building unit 3, the growth of the plant is surely promoted, and the roots of the plant quickly remove the soil. Will be retained.

On the other hand, contrary to the growth of the plants, the net 6 is mainly corroded (in the case of iron), and the agar is gradually decomposed and disappeared by bacteria and the like, and is in a state very close to the natural state. Becomes For this reason, it is possible to provide a very favorable natural environment for aquatic organisms, plants and the like. In this case, as the time elapses, the solidification function of the soil based on the agar will decrease, but the plant is set to grow greatly before the solidification function is lost (for example, the amount of agar) ,material,
It is set relatively depending on the variety of the plant, etc., and the soil retention function based on the root of the plant ensures prevention of soil loss.

FIG. 4 shows a second embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the second embodiment, agar is mixed with soil (for example, soil at a construction site) 4 to form a surface soil 10, and the surface soil 10 is placed on the slope 2 before the agar joins the soil 4 together. Thus, the surface soil 10 on the slope 2 is solidified after the soil 4 based on the agar is joined to each other. Also according to this, the same operation and effect as the basic operation and effect of the first embodiment can be obtained.

Although the embodiments have been described above, the present invention includes the following aspects. 1) The degradable binder is not limited to agar, but may be carrageenan, pectin, gelatin, etc., as long as it decomposes with time and disappears, and in that case, those which do not affect the natural environment upon decomposition. Good thing. 2) A fibrous substance (vegetable fiber, glass fiber, iron wire, etc.) is contained in the solidified material 5 in the civil engineering building unit 3 in a dispersed state as a reinforcing material. 3) As a method for producing the solidified material 5, agar powder is mixed with the soil 4, heat (for example, steam) is added thereto to melt the agar, and then the agar is solidified again to separate the soil 4 from each other. Combine. 4) As shown in FIG. 5, the net 6 is formed so as to be located below the solidified material 5. Thereby, the net 6 is placed on the work surface.
Not only can the soil 4 bound by the agar be set on the net 6 and solidified, but also the entire solidified material 5 can be effectively supported by the net 6 when the civil engineering construction unit 3 is transported. Become.

It is to be noted that the object of the present invention is not limited to the specified one, but also includes providing what substantially corresponds to what is described as preferred or advantageous.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a river bank according to a first embodiment.

FIG. 2 is a partially enlarged plan view illustrating laying of a civil engineering building unit on a river bank according to the first embodiment.

FIG. 3 is a partially enlarged side view of FIG. 2;

FIG. 4 is an explanatory diagram showing a river bank according to a second embodiment.

FIG. 5 is a diagram showing a modification of the civil engineering building unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 River revetment 2 Slope 3 Civil engineering building unit 4 Soil 5 Solidified material 6 Net 6a Corner 7 Anchor 10 Surface soil 11 Plant growing agent 12 Plant seed

Claims (19)

[Claims] 1. A civil engineering construction wherein the surface soil is solidified with a degradable binder. 2. The surface soil according to claim 1, wherein the surface soil is formed by laying a large number of civil engineering building units evenly on a slope, and each of the civil engineering building units slabs the soil with a degradable binder. A civil engineering structure, which is configured to be solidified in a shape. 3. The flexible sheet unit according to claim 2, wherein a flexible sheet body is included as a reinforcing member in the civil engineering building unit while a part of the flexible sheet body is projected to the outside. Civil engineering structure characterized by the following. 4. The civil engineering structure according to claim 3, wherein the protruding portion of the flexible sheet body is fixed to a slope by a connecting member. 5. The civil engineering structure according to claim 2, wherein a plant growing agent is mixed in each of the civil engineering building units. 6. The civil engineering structure according to claim 2, wherein a seed of a plant is mixed in each of the civil engineering building units. 7. A unit for civil engineering construction, wherein the soil is solidified into a slab with a degradable binder. 8. The unit for civil engineering construction according to claim 7, wherein a reinforcing material is contained inside. 9. The civil engineering building unit according to claim 8, wherein the reinforcing material is fibrous. 10. The civil engineering building unit according to claim 9, wherein the reinforcing member is a flexible sheet, and a part of the flexible sheet protrudes outside. 11. The civil engineering construction unit according to claim 10, wherein the flexible sheet is a rectangular net-like piece, and four corners of the net-like piece are projected outward. . 12. The unit for civil engineering construction according to claim 7, wherein a plant growth agent is mixed therein. 13. The unit for civil engineering construction according to claim 7, wherein a plant seed is mixed therein. 14. Mixing a degradable binder with soil to form a surface soil, and laying the surface soil on a slope before the degradable binder bonds the soil to each other. Characteristic construction method of civil engineering structures. 15. A method for preparing a large number of civil engineering building units in which soil is solidified in a thick plate shape with a degradable binder, and laying the large number of civil engineering building units evenly on a slope. Construction method of civil engineering structures. 16. The civil engineering structure unit according to claim 15, wherein each of the civil engineering building units includes, as a reinforcing member, a flexible sheet body while partially projecting the flexible sheet body to the outside. Utilizing the protruding portion of the flexible sheet body, by using a connecting member, connecting adjacent civil engineering building units and connecting each civil engineering building unit to a slope. Construction method for civil engineering structures. 17. The flexible sheet according to claim 3, wherein the flexible sheet has decomposability. 18. The method according to claim 1, wherein the degradable binder is set such that the solidifying function of the soil is ensured at least during a period during which plants grow in the soil. thing. 19. The method according to claim 1, wherein the degradable binder is agar.