JP2007191933A - Paving structure and paving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paving structure and a paving method provided with structural quality (load resistance or the like) as a pavement, reduction of a construction cost and practical utility as a weed-killing measure in common. <P>SOLUTION: The paving structure presents a two-layer structure comprising a weed-killing sheet 1 laid on the ground surface, and a surface layer 2 formed by laying a paving agent which is a mixture of bark crushed chips at about 4-8 wt.%, a supplementary material such as coarse sand at about 60 wt.%, water at about 15-20 wt.% and a solidifier at about 12-21 wt.%, on the weed-killing sheet 1 and compacting it by rolling. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a ground paving structure and a paving method.

  If the ground is left unattended, weeds will grow, and if there is a lot of traffic from people and vehicles, that part will be dug out and a puddle will be created. In order to avoid such a situation, the ground is appropriately paved to facilitate the transportation of people and vehicles. However, depending on the location, durability may not be as required as in the past, and flexibility, water absorption, and integrity with the surrounding environment may be important depending on the application. In some cases, the goal is to control the growth of weeds.

  Therefore, conventionally, a method for forming a landscaped surface with high grass-proofing and practical shape retention while maintaining unity with the surrounding landscape to a minimum (see, for example, Patent Document 1 below) A paving method that is excellent in harmony with nature and that can maintain cushioning and aesthetics over a long period of time (for example, see Patent Document 2 below). The roadbed is evenly mixed with soil, wooden pieces and stabilizers. A roadbed (for example, refer to Patent Document 3 below) that can obtain a CBR value equal to or higher than that of a general roadbed, or a wood material made of a pulverized product of a heartwood or bark of a tree. A paving structure and a paving method (see, for example, Patent Document 4 below) that are easy to walk, harmonize with the environment, and excellent in workability and economy have been introduced.

JP 2002-97642 A Japanese Patent Laid-Open No. 11-36217 JP 2002-227107 A JP 2005-201033 A

  However, since the technique of the above-mentioned Patent Document 1 only sprays a material that serves as a plant fixing prevention layer, it does not involve structural quality as a paved road. Moreover, in the technique of patent document 2 and 3, since it is necessary to form the laminated structure which consists of a several layer, there exists a problem that a construction period increases and the construction cost is also high. On the other hand, in the technique of Patent Document 4, the pavement structure is a single layer, but since the emphasis is on harmony with ease of walking and the environment, it is not practical as a herbicidal measure.

  The present invention has been made in view of the above circumstances, and has a pavement structure and pavement that combine structural quality as a pavement (load resistance, etc.), reduction of construction costs, and practicality as a weedproof measure. The purpose is to provide construction methods.

  The pavement structure according to the present invention formed to solve the above-mentioned problems includes a herbicidal sheet laid on the ground surface, and a bark crushed chip in the form of the herbicidal sheet: about 4 to 8 weight percent, supplementary material such as coarse sand : About 60 weight percent, water: about 15-20 weight percent, and solidifying agents such as cement and asphalt: a two-layer structure with a surface layer formed by laying and rolling a pavement mixed with about 12-21 weight percent It is characterized by presenting.

  Further, the pavement method according to the present invention made to solve the above problems includes a weeding process for weeding a paved area, a process for installing a formwork surrounding the paved area, and a paved area after finishing the weeding process. The weedproof sheet laying process to spread the weedproof sheet on the entire area surrounded by the formwork and the paving agent mixed with bark crushed chips, coarse sand, cement, water, and asphalt emulsion is finished to about twice the thickness As a surplus, a laying step for laying on the grass protection sheet in the paved area, and a rolling step for uniformly pressurizing the surface of the pavement agent laid through a thin flat plate to the finished thickness. It is characterized by going through.

  It is preferable that the paving agent is prepared by charging and mixing bark crushed chips, coarse sand, cement, water and asphalt emulsion in this order in order to provide elasticity to the surface layer after solidification and to prevent surface cracks.

  Since the pavement structure formed by the pavement method according to the present invention is preliminarily mixed with the components of the pavement agent, most of the strength that the pavement structure should have before the visit to the site is guaranteed, The work becomes extremely easy, and the construction cost is greatly reduced by the simplicity of the structure formed by such a construction method.

  As a result of the above paving method, a two-layer structure consisting of a weedproof sheet and a surface layer (paving agent) formed on the ground surface as shown in Fig. 1 is added, and a solidifying agent such as cement or asphalt emulsion is added to the surface layer consisting of the paving agent. Therefore, germination of seeds of weeds flying from the outside is prevented, and even if germination occurs, growth is suppressed and rooting to the ground surface can be prevented. In addition, by mixing the pavement agent in a predetermined order, it gives elasticity to the surface layer after solidification, prevents cracks from occurring when stress is applied, and weed seeds penetrate into the cracks. Or troubles caused by permeation of rainwater can be avoided. Furthermore, the lower layer of the herbicidal sheet inhibits the growth of weed roots that cannot be removed from the ground surface, thereby inhibiting overgrowth.

Hereinafter, the pavement structure by this invention is demonstrated with the pavement method.
The pavement structure according to this example includes a weeding process for weeding the paved area, a frame process for installing a formwork surrounding the paved area (see FIG. 2), and a formwork of the paved area after the weeding process. The weeding sheet laying process (see FIG. 3) for laying the weeding sheet 1 over the entire area, and the paving agent is finished on the weeding sheet 1 in the paved area with an extra thickness of about twice the thickness. A surface leveling process (see FIG. 5) and a surface layer 2 (in FIG. 1, a bark chip is used to prevent the surface of the paving agent laid through a thin flat plate to be uniformly pressed to the finished thickness. It is formed by a paving method through a rolling step (see FIGS. 6 to 8) for forming a grass paving mixture).

  In accordance with the weeding step, leveling the surface as flat as possible makes the thickness of the surface layer 2 uniform, the strength becomes uniform, and the overall strength increases. It is also convenient when installing the formwork in the subsequent framework process. The mold frame is configured by appropriately combining wood and aluminum frame materials. The herbicidal sheet 1 is made of fiber such as jute (an environmentally friendly material that can be rotted and returned to the soil), polyester, vinyl chloride, polypropylene, etc., and the fibers are woven or non-woven at intervals that do not allow grass growth. It may be formed as a sheet that maintains water permeability.

  The paving agent is, for example, bark crushed chips: 6% by weight, coarse sand as a supplementary material: 60% by weight, cement as a first solidifying agent (ordinary Portland cement: JIS standard): 7% by weight, asphalt as a second solidifying agent Emulsion (special asphalt emulsion): 9 weight percent, water: 18 weight percent, bark crushed chips: about 4-8 weight percent, coarse sand and other supplements: about 60 weight percent, and water: About 15 to 20 weight percent, and two kinds of solidifying agents consisting of asphalt and cement: about 12 to 21 weight percent are mixed using, for example, a pug mill mixer or the like.

  Incidentally, in the case of the paving agent, bark crushed chips, coarse sand, cement, water, and asphalt emulsion were introduced and mixed in this order (see FIG. 4). By mixing in this order, after solidification, the surface layer can be elastic, and surface cracks can be prevented.

  FIG. 9 shows the pavement structure after about one month has passed after being constructed outdoors as described above, and sowing on both the pavement structure according to the present invention and a normal roadbed (usually asphalt pavement), and regularly spraying water. This is a photograph of the appearance. As a result, weeds are not germinated at all in the pavement structure according to the present invention, and germination is seen in several places in the normal roadbed, so the high herbicidal effect by comparison with the normal roadbed. According to the comparison with the non-paved area around it, you can feel the high herbicidal effect by comparing with the non-paved area, but more with the paved structure according to the present invention and the normal roadbed In order to confirm a clear disparity, we will continue to observe the progress.

  The pavement structure according to the present invention can suppress the growth of weeds under elevated railways, such as Shinkansen, and can prevent pests (stink bugs) damage to surrounding fields, etc. By using chips and solidifying with an emulsifier such as asphalt, we aimed for a pavement structure with excellent landscape.

It is sectional drawing which shows an example of the pavement structure by this invention. It is explanatory drawing which shows 1 process of the pavement construction method by this invention. It is explanatory drawing which shows 1 process of the pavement construction method by this invention. It is explanatory drawing which shows 1 process of the pavement construction method by this invention. It is explanatory drawing which shows 1 process of the pavement construction method by this invention. It is explanatory drawing which shows 1 process of the pavement construction method by this invention. It is explanatory drawing which shows 1 process of the pavement construction method by this invention. It is explanatory drawing which shows 1 process of the pavement construction method by this invention. It is an external view which shows an example which compared the pavement structure by this invention, and a normal roadbed.

Explanation of symbols

  1 weedproof sheet, 2 surface layer,

Claims (3)

  On the weedproof sheet (1) laid on the ground surface, and on the weedproof sheet (1), bark crushed chips: about 4-8 weight percent, supplementary material: about 60 weight percent, and water: about 15-20 weight Asphalt solidifying agent and cement solidifying agent: a pavement structure having a two-layer structure with a surface layer (2) obtained by laying and rolling a pavement agent mixed with about 12 to 21% by weight.   Weeding process for weeding the pavement area, installation process for the formwork surrounding the pavement area, and weed protection sheet (1) covering the entire area surrounded by the formwork of the pavement area after the weeding process A sheet laying process and a paving agent mixed with bark crushed chips, coarse sand, cement, water, and asphalt emulsion are finished, and the surface of the pavement area (1) is overlaid with approximately twice the thickness. A paving method through a leveling process of laying on the surface and a rolling process of uniformly pressurizing the surface of the paving agent laid with a thin flat plate to the finished thickness. The pavement method according to claim 2, wherein the pavement agent is charged and mixed in the order of bark crushed chips, coarse sand, cement, water, and asphalt emulsion.