JP6399708B2 - Dirt pavement method - Google Patents

Description

  The present invention relates to a soil pavement construction method for preventing cracks on a pavement surface and deterioration due to freezing and thawing.

  The soil pavement method (earth-based pavement method) is a method in which the soil surface is paved with a pavement material obtained by mixing soil or sand of a natural material and a solidifying agent mixed material. This soil pavement method is superior to general concrete and asphalt pavements in terms of landscape, harmony with the natural environment, high water permeability, high water retention, moderate elasticity, and moderate shock absorption. It is known to have such characteristics.

  However, pavement materials used in this soil pavement method are generally inferior in strength and durability compared to concrete, asphalt and the like. Therefore, the soil pavement method has the disadvantages that the pavement surface is easily worn and is vulnerable to environmental changes and secular changes. Therefore, when constructing the soil pavement method (earth-based pavement method), it has been necessary to take measures to increase the strength and prevent deterioration of the pavement surface.

  Conventional soil pavement methods that take measures to increase the strength and prevent deterioration of the pavement surface include soil cement methods in which cement is mixed with pure sand soil, construction methods in which cement and magnesium oxide are mixed in true sand soil, and cement in true sand soil. A construction method in which an inorganic solidifying agent is blended is known. However, as in these conventional soil pavement construction methods, in a soil pavement material containing a large amount of cement-based solidifying agent, the pH value of the pavement becomes 13 or more, so that the alkali aggregate reaction on the pavement surface proceeds. There was a problem that the pavement surface deteriorated.

  In view of the above circumstances, the inventors of the present application invented a soil pavement construction method characterized by a step of adding a weak alkali solidifying agent for the purpose of suppressing the alkali aggregate reaction that is one of the causes of pavement surface deterioration. However, a patent application has already been filed (see Patent Document 1).

JP 2014-55433 A

  In the soil pavement construction method of Patent Document 1, the degradation of the pavement surface caused by alkali-aggregate reaction could be suppressed, but cracking due to weed germination, destruction from under the pavement surface by soil dragon, freezing in winter Problems such as deterioration of the pavement surface due to melting still remained.

  This invention is made in view of the above point, and makes it a subject to provide the earth pavement construction method which can prevent generation | occurrence | production of the crack in a pavement surface, and freeze-thaw.

The pavement method according to the present invention for solving the above problems is a soil pavement method for laying a pavement material on the soil surface,
A stretching step of stretching a net on the soil surface;
A planting position selection step of selecting a planting position of the ground cover plants within the stretched range of the net;
A boxing installation step of installing a boxing for planting that exposes the soil surface under the net at the planting position;
A laying step of laying a paving material other than the installation location of the planting boxing;
A planting step of planting the ground cover plants at the planting position in the boxing for planting; and
And a covering step of covering the entire surface of the pavement material by growing the ground cover plants.

  According to the present invention, since the stretching process of stretching the net on the soil surface and the laying process of laying the pavement material other than the installation location of the boxing for planting, the crack of the germination and the pavement surface by the soil dragon Destruction can be prevented. In addition, a planting position selection process that selects the planting position of the ground cover plants within the stretched area of the net, and a boxing installation that installs a boxing box for planting that exposes the soil surface under the net at the planting position Since the process, the planting process of planting the ground cover plants at the planting position in the boxing for planting, and the covering process of covering the entire surface of the paving material with the ground cover plants are performed in the winter season. Can be prevented from freezing and thawing.

As a preferred embodiment of the present invention, before the stretching step, a surface leveling step of the soil surface,
Before the laying step, a mixing step of obtaining the pavement material by mixing the soil after the surface leveling step and the solidifying agent mixture is further performed.
By mixing the soil and the solidifying agent mixture, it is possible to obtain a dense pavement by mixing finely. As a result, the strength of the pavement surface is increased, and it is possible to prevent the earth dragon from destroying the area directly beneath the pavement. Also, mixing the soil and the solidifying agent mixture slows down the water permeability of the pavement, and prevents the weeds from germinating by constructing the water retaining capacity necessary for the overgrowth of the ground cover plants. it can. The soil here is not particularly limited as long as it can obtain a pavement material by mixing with a solidifying agent mixture, for example, purchased soil such as pure sand soil or soil after surface leveling process. be able to.
Moreover, the soil at the construction site can be effectively used by using the soil after the surface leveling process.

In a preferred embodiment of the present invention, the pavement material is mixed with 10 parts by mass or more of the solidifying agent mixed material with respect to 100 parts by mass of soil, and the solidifying agent mixed material is weakly alkaline. To do.
By obtaining 10 parts by mass or more of the solidifying agent mixture with respect to 100 parts by mass of the soil, it is possible to further improve durability and weather resistance. Further, by further reducing the water permeability of the pavement material and constructing to the extent of water retention necessary for the overgrowth of the ground cover plants, it is possible to further prevent weeds from germinating.
Moreover, even when 10 mass parts or more of solidification agent mixing materials are mixed with respect to 100 mass parts of soil, the pH value of the pavement material becomes 13 or more because the solidification agent mixing material is weakly alkaline. In order to prevent, the degradation of the pavement surface due to the alkali aggregate reaction can be prevented.

In a preferred embodiment of the present invention, the ground cover plant is clapia and / or lipia.
Thus, when the plant of the ground cover plant is Clapia and / or Lipia, the covering density can be increased and weed invasion can be suppressed. In addition, because the ground cover plants are clapia and / or lipia, the entire planting surface can be greened quickly even in a poor soil environment, thus enhancing the surface protection and preventing freezing and thawing in winter. , Show a higher effect.

In a preferred embodiment of the present invention, the planting position selected in the planting position selection step is set within 70 cm of the adjacent planting position.
By the planting position selected in the planting position selection step being set within 70 cm of the adjacent planting position, the entire surface of the paving material is more efficiently covered with the plant of the ground cover plant, Inhibition of weeds and prevention of freezing and thawing can be achieved.

  INDUSTRIAL APPLICABILITY The present invention can provide a soil pavement construction method that can prevent generation of cracks and freezing and thawing on a pavement surface.

It is a figure which shows the construction process of the dirt pavement construction method which concerns on one Embodiment of this invention. It is a figure which shows the stretching process of the dirt pavement construction method which concerns on one Embodiment of this invention. It is a figure which shows the boxing installation process for planting of the dirt pavement construction method which concerns on one Embodiment of this invention. It is a figure which shows the laying process of the dirt pavement construction method which concerns on one Embodiment of this invention. It is a figure which shows the planting process of the dirt pavement construction method which concerns on one Embodiment of this invention. It is a figure which shows the coating process of the dirt pavement construction method which concerns on one Embodiment of this invention. It is explanatory drawing which shows the comparative example with the other construction method of the dirt pavement construction method which concerns on one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Drawing 1 is a figure showing the flow of the whole construction process of the dirt pavement construction method concerning one embodiment of the present invention.
The soil pavement method according to the present embodiment includes a surface leveling step (S1) for leveling by plowing the soil surface 1 that is a construction area, and a net 2 is stretched on the soil surface 1 after plowing. A stretching step (S2), a planting position selection step (S3) for selecting the planting position of the ground cover plant within the stretched range of the net 2, and the soil surface 1 under the net 2 at this planting position A boxing installation step (S4) for installing the planting box opener 3 to be exposed, and a mixing step (S5) for obtaining the pavement material 4 by mixing the natural material soil or sand and the solidifying agent mixture. And the laying process (S6) which lays the pavement material 4 in addition to the installation location of the boxing 3 for planting, and the planting process (S6) for planting ground cover plants at the planting position 3 in the boxing for planting ( S7) and a covering step for covering the entire surface of the paving material 4 by growing the ground cover plants ( And 8), perform.
Hereinafter, each step will be described in detail.

(Surface leveling process)
First, the surface leveling step (S1) for leveling the soil surface 1 as the construction area will be described.
If necessary, spray roots and herbicides on the soil surface 1 to remove pebbles, foreign matters, and the like. After that, work equipment, water, etc. are brought into the site, the construction thickness is confirmed, plowing and root removal are performed using a small cultivator, the surface is easily leveled, and the construction area is leveled. At this time, the end of the roadbed is leveled by scraping. The construction thickness depends on the intended road surface strength, but the standard construction thickness is around 50 to 300 mm. At this time, as shown in FIG. 2 (B), the leveling may be performed so that the construction area is lowered by the construction thickness or the leveling may be performed in a flat shape.

(Net stretching process)
Next, the stretching process (S2) of the net 2 will be described with reference to FIG.
FIG. 2 (A) shows a perspective view of the soil surface 1 in a state where the net 2 is stretched, and FIG. 2 (B) shows a cross-sectional view thereof.
The stretching process (S2) of the mesh 2 is a process of covering the entire surface desired to be constructed on the soil surface 1 and fixing the mesh 2 to the soil surface 1 by a fixing means such as an anchor pin (not shown). Examples of the net 2 include a lath metal net formed of a metal material such as galvanized, steel, and stainless steel and having an eye of about 50 mm. The net 2 used here is preferably a net 2 having a strength of a certain value or more, such as a lath metal net. By stretching this lath wire mesh on the soil surface 1, the strength of the pavement surface can be improved, and the planting box opener 3 can be prevented from falling off when the planting box opener 3 is installed. it can. Note that such a lath wire mesh does not have to be formed by a single wire mesh, and may be formed by combining a plurality of lath wire meshes.

(Planting position selection process)
Next, a planting position selection process (S3) is demonstrated.
The planting position selection step (S3) is a step of selecting a position for installing a boxing 3 for planting described later according to the shape of the soil surface 1. Specifically, the installation location of the boxing 3 for planting is selected at a position and interval suitable for the purpose of the mainland pavement method of covering the entire surface of the pavement material 4 with ground cover plants. At this time, the shortest distance d between adjacent installation locations is set in consideration of the growth range of the plant 5 of the ground cover plant, and in the case of the repia and clapia exemplified in the present invention, the interval within 70 cm. It is preferable that it is set to.

(Boxing installation process for planting)
Next, FIG. 3 shows the installation process (S4) of the boxing 3 for planting.
FIG. 3 (A) shows a perspective view of the soil surface 1 in a state in which the boxing box 3 for planting is installed at the installation location selected in the planting position selection step (S3), and FIG. A cross-sectional view is shown.
The boxing installation step (S4) for planting is a step of installing the boxing 3 for planting in order to secure a space for planting the plant 5 of the ground cover plant. The boxing 3 for planting is formed, for example, by forming it into a cylindrical shape having a height of 20 cm. And the space which plants the plant 5 of a ground cover plant can be ensured by performing the installation process of such boxing 3 for planting. When installing the boxing box 3 for planting, the boxing box 3 for planting is inserted into the eyes of the net 2. If the mesh 2 has a smaller diameter than the planting box 3 and the planting box 3 cannot be inserted into the mesh, a part of the mesh 2 is cut to remove the mesh. It is also possible to enlarge. The shape of the box 3 for planting is not limited to the cylindrical shape, but has a three-dimensional shape that can secure a space for planting a columnar member such as a triangular prism or a quadrangular prism, or a plant 5 of the ground cover plant. Any shape can be used.

(Mixing process)
Next, the mixing process (S5) of the paving material 4 will be described.
A mixing process is a process of obtaining the pavement material 4 by mixing a solidification agent and soil.
In this embodiment, a weak alkali solidifying agent (CX agent) having the following composition is preliminarily mixed with slag cement to obtain a solidifying agent mixture (CP Mix2 agent), the solidifying agent mixture (CP Mix2 agent) and the surface The pavement material 4 is obtained by mixing the soil after the leveling step (step S5). The soil may be any soil (for example, pure sand soil) as long as the pavement material can be obtained by mixing with the solidifying agent mixture, but after the surface leveling step (S1). If soil is used, the soil at the construction site can be used effectively.
In the present embodiment, a large drum stirrer capable of mixing 200 kg to 300 kg per cycle is suitably used as a mixing means. However, in a small-scale construction, a means capable of mixing the soil (or pure sand soil) and the solidifying agent mixture after the surface leveling step so that a drum-type stirrer of a size normally used can be used. Any means may be used.
Moreover, the mixing | blending of the solidifying agent and the pavement material 4 after mixing is as follows in this embodiment.

1. Weak alkali solidifying agent (CX agent)
Calcium chloride 89% by mass
Ferrous sulfide 4% by mass
Magnesium chloride 4% by mass
Other inorganics 3% by mass

2. Solidifying agent mixture (CP Mix2 agent)
2. Slag cement 100 parts by weight Weak alkali solidifying agent (CX agent) 5 parts by weight Soil mixing ratio Soil 100 parts by weight Solidifying agent mixture (CP Mix2 agent) 10 parts by weight Water 2 parts by weight

When a weak alkali solidifying agent (CX agent) is preliminarily mixed with slag cement to prepare a solidifying agent mixture, for example, 2 to 15 parts by mass of the weak alkali solidifying agent is preferable with respect to 100 parts by mass of slag cement, preferably 3 -7 parts by mass.
The dose of the solidifying agent mixture with respect to the soil is, for example, 1 part by mass or more with respect to 100 parts by mass of the soil, preferably 10 parts by mass or more with respect to 100 parts by mass of the soil. The upper limit of the dose of is a common sense amount that the mixture with soil functions as a paving material. The solidifying agent mixture is preferably weakly alkaline.

(Pavement laying process)
Next, the laying process (S6) of the paving material 4 will be described with reference to FIG.
FIG. 4 (A) shows a perspective view of the soil surface 1 in a state in which the paving material 4 is laid, and FIG. 2 (B) shows a cross-sectional view thereof.
The laying process of the pavement material 4 is performed by marking a pavement material input location using a long measure and pouring the pavement material 4 after the mixing process into the soil surface 1 on which the net 2 is stretched. At this time, the pavement 4 is not laid in the hollow portion of the planting box opener 3, and the soil surface 1 of the hollow portion of the planting box opener 3 is exposed. As a pouring method, a tow truck, a backhoe, a small car (human power), or the like can be used.

(Planting process)
Next, the planting step (S7) of the plant 5 of the ground cover plant will be described with reference to FIG.
FIG. 5 (A) shows a perspective view of the soil surface 1 after planting the plant 5 of the ground cover plant, and FIG. 5 (B) shows a cross-sectional view thereof.
The planting process of the plant 5 of the ground cover plant is performed by planting the plant 5 of the ground cover plant in the space where the box 3 for planting is installed after drying the pavement 4 after mixing. Under the present circumstances, it is preferable to plant the plant 5 of a ground cover plant in the hollow part of the box 3 for planting. It is also possible to remove the box 3 for planting and plant the plant 5 of the ground cover plant. If construction is winter, it is possible to plant only spring. At this time, it is preferable that the plant 5 of the ground cover plant is Clapia and / or Lipia.

(Coating process)
Next, the covering process (S8) of the plant 5 of the ground cover plant will be described with reference to FIG.
FIG. 6A shows a perspective view of the soil surface 1 after the covering of the plant 5 of the ground cover plant, and FIG. 6B shows a cross-sectional view thereof.
The covering process of the plant 5 of the ground cover plant covers the entire surface of the paving material 4 by growing the plant 5 of the ground cover plant by a method usually used when growing the ground cover plant. Is done by.

According to the soil pavement construction method according to the present embodiment, a stretching process (S2) for stretching the net 2 on the soil surface 1 and a laying process for laying the paving material 4 in addition to the installation location of the boxing 3 for planting ( By performing S6), the pavement surface is strengthened, and it is possible to prevent the pavement surface from being broken by cracks and earth dragons, and can withstand long-term use.
Moreover, the planting position selection process (S3) which selects the planting position of the plant 5 of the ground cover plant within the stretched area of the net 2, and the soil surface 1 under the net 2 at the planting position A boxing installation step (S4) for installing the boxing 3 for planting to be exposed, and a planting step for planting the plant 5 of the ground cover plant at the planting position in the boxing 3 for planting ( By performing S7) and a covering step (S8) for covering the entire surface of the pavement material 4 with the plant 5 of the ground cover plant, preventing the temperature of the pavement from lowering and preventing freezing and thawing in winter. Can do. Furthermore, by planting and growing the ground cover plants, it will blend into the surrounding natural landscape and contribute to the creation of a human-friendly aesthetic, compared to artificial asphalt, concrete and grass protection sheets.

  Since the soil pavement method according to the present embodiment finely mixes the soil and the solidifying agent mixture, it is possible to obtain a pavement 4 having high density and low “water permeability” and “water retention”. Therefore, according to the soil pavement method according to the present invention, the pavement material 4 having low “water permeability” and “water retention” is laid and water does not permeate into the growth layer, thereby preventing the germination of weeds that require water for germination. However, it is possible to obtain an effect of promoting the growth of ground cover plants that do not require moisture for growth.

In the soil pavement construction method according to the present embodiment, since the pavement material 4 is obtained by mixing 10 parts by mass or more of the solidifying agent mixture with 100 parts by mass of the soil, further improvement in durability and weather resistance can be achieved. it can.
Moreover, since the pavement material 4 is obtained by mixing 10 parts by mass or more of the solidifying agent mixed material with respect to 100 parts by mass of the soil, the water permeability of the pavement surface is further blunted, and the plant 5 of the ground cover plant grows. The water retention required for the construction can be reduced, and weeds can be further prevented from germination.
Moreover, even if 10 mass parts or more of solidification agent mixing materials are mixed with respect to 100 mass parts of soil because the solidification agent mixing material is weakly alkaline, the pH value of the pavement material 4 becomes 13 or more. In order to prevent, the degradation of the pavement surface due to the alkali aggregate reaction can be prevented.

  According to the soil pavement construction method according to the present embodiment, when the plant 5 of the ground cover plant is clapia and / or lipia, the covering density can be further increased and weed invasion can be suppressed. In addition, since the ground cover plant 5 is clapia and / or repia, the entire planting surface can be greened quickly even in a poor soil environment, thus enhancing the surface protection and preventing freezing and thawing in winter. Shows a higher effect.

  FIG. 7 shows a comparative example between the dirt pavement method according to this embodiment and another method. As shown in FIG. 7, the soil pavement method according to the present embodiment, except for water permeability and water retention, is workability, grass protection, strength, freeze-thaw, shrinkage crack, durability / weather resistance, toxic substance elution, energy saving. Good results are obtained in any of load, warming addition, construction thickness, slope spray response, and cost.

  In addition, although the example applied to the soil surface 1 of a slope using FIGS. 2-6 was shown as an Example of the soil pavement construction method which concerns on this invention, it can naturally apply to a plane and a wall surface.

The present invention can be effectively applied to the following ground and roadbed.
Parks, gardens, grounds, schools, kindergartens / nursery schools, public facilities, temples and shrines, tangible cultural properties, riverbeds, roads and roadside lanes and slopes, bicycle roads, railway slopes, airports, service areas, factories Site, rooftop greening, apartment surroundings, building surroundings, western park, power transmission / transmission tower base, dock run.

DESCRIPTION OF SYMBOLS 1 Soil surface 2 Net 3 Box removal for planting 4 Pavement material 5 Plant of ground cover plant

Claims (5)

A soil pavement method for laying pavement material on the soil surface,
A stretching step of stretching a net on the soil surface;
A planting position selection step of selecting a planting position of the ground cover plants within the stretched range of the net;
A boxing installation step of installing a boxing for planting that exposes the soil surface under the net at the planting position;
A laying step of laying the pavement other than the installation location of the boxing for planting,
A planting step of planting the ground cover plants at the planting position in the boxing for planting; and
There rows, and a coating step of coating the entire surface of the pavement material by growing the ground under the plant include,
The pavement material is mixed with 10 parts by mass or more of a solidifying agent mixed material with respect to 100 parts by mass of soil,
The solidifying agent mixture is weakly alkaline,
A soil pavement construction method, wherein the ground cover plants are clapia and / or lipia . Before the tensioning step, the surface leveling step of the soil surface,
The soil according to claim 1, further comprising a mixing step of obtaining the pavement material by mixing the soil after the surface leveling step and the solidifying agent mixture before the laying step. Paving method.   The soil pavement method according to claim 1 or 2, characterized in that it is installed in a form in which the axial direction of the cylindrical boxing for planting is orthogonal to the inclined surface of the soil surface. The soil pavement construction method according to any one of claims 1 to 3, wherein the solidifying agent mixed material contains calcium chloride and magnesium chloride and does not contain magnesium oxide .   The soil pavement method according to any one of claims 1 to 4, wherein the planting position selected in the planting position selection step is set within 70 cm of the adjacent planting position.