Stump treatment method and laminate

Abstract

To enable suppression of construction failure in stump treatment.SOLUTION: A stump treatment method includes the steps of: applying an adhesive containing a solvent and asphalt to a construction region including a protruding surface of a stump 1 and at least a part of ground 2 adjacent to the stump 1, thereby forming an adhesive layer 31; bonding an upper surface of the adhesive layer 31 to a lower surface of a light-shielding sheet 32 to form a laminate 3 including the adhesive layer 31 and the light-shielding sheet 32; and drying the laminate 3. The lower surface of the light-shielding sheet 32 includes at least a portion that is soluble in the solvent.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a stump treatment method for inhibiting the growth of stumps of felled trees.

Background Art

[0002] Methods for treating stumps remaining after felling trees are known. For example, Patent Document 1 discloses a stump treatment sheet in which an upper sheet and a lower sheet are laminated.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, Patent Document 1 describes that when covering the ground around the stump with the stump treatment sheet, it is fixed using pins. However, for inhibiting the growth of the stump, the adhesion between the bulging stump and the stump treatment sheet, or between the ground and the stump treatment sheet is insufficient. As a result, there has been a problem that construction defects are likely to occur.

[0005] In view of the above problems, an object of the present disclosure is to provide a stump treatment method and a laminate that can improve construction defects in stump treatment.

Means for Solving the Problems

[0006] The method for treating a stump according to one aspect of the present disclosure includes a step of applying an adhesive containing a solvent and asphalt to a construction area including the protruding surface of the stump and at least a part of the ground adjacent to the stump to form an adhesive layer; a step of bonding the upper surface of the adhesive layer and the lower surface of a light-shielding sheet to form a laminate including the adhesive layer and the light-shielding sheet, wherein the lower surface of the light-shielding sheet includes at least a part soluble in the solvent; and a step of drying the laminate.

[0007] A laminate according to one aspect of the present disclosure includes an adhesive layer containing asphalt formed in a construction area including the protruding surface of a stump and at least a part of the ground adjacent to the stump, and a light-shielding sheet formed on the adhesive layer and welded to the surface of the adhesive layer.

Advantages of the Invention

[0008] According to the present disclosure, it is possible to provide a method for treating a stump and a laminate that can improve construction defects in stump treatment.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0010] <Problems of the Embodiment> Here, the problems of the embodiment will be described again. If the stumps remaining after felling trees were left as they were, there was a problem that they would grow thick due to light and moisture and damage surrounding structures. In particular, the stumps of trees growing in the gaps of the paved surface were severely problematic in that they would damage the paved surface when they grew. Therefore, it was necessary to inhibit the growth of the stumps. In order to inhibit the growth of the stumps, it was required to carry out at least one of blocking light and preventing the intrusion of moisture.

[0011] Here, the methods for inhibiting the growth of stumps are roughly classified into a liquid pouring type, a sheet type, or a roadbed type. The liquid pouring type is a method of pouring a liquid hardener into the gaps of the paved surface and hardening it. However, in the liquid pouring type, it took a long time to harden, and since the liquid hardener had high fluidity, it was difficult to cover the raised stumps. The sheet type is a method of covering the construction area with a light-shielding sheet and fixing the ends of the light-shielding sheet by driving them in with pins or the like. However, in the sheet type, there was a problem that the adhesion between the stump and the light-shielding sheet or between the ground and the light-shielding sheet was insufficient, and construction defects such as peeling and displacement were likely to occur. In particular, the above problems were severe for raised stumps. There was also a problem that construction was difficult when the construction area was small. The stump treatment sheet described in Patent Document 1 above is classified as the sheet type. The roadbed type is a method of pouring roadbed materials into the construction area and paving them for the purpose of effectively utilizing the land by making a parking lot after construction. However, in the roadbed type, it was difficult to deal with raised stumps, and there was also a problem that construction was difficult when the construction area was small.

[0012] This embodiment was made to solve at least one of the above problems.

[0013] <Definition of Terms> In this specification, the X-axis, Y-axis, and Z-axis are axes that are substantially perpendicular to each other. The X-axis direction and the Y-axis direction are horizontal directions. For example, the X-axis direction is the length direction of the road and is also referred to as the first direction. The Y-axis direction is the width direction of the road and is also referred to as the second direction. The Z-axis direction is the height direction. For example, the positive Z-axis direction is the direction away from the ground, that is, the upward direction, and the negative Z-axis direction is the direction approaching the ground, that is, the downward direction. In this specification, the plane refers to the XY plane, and the side surface refers to the YZ plane or the ZX plane.

[0014] In this specification, a tree refers to a plant in which the main trunk grows larger than the side branches. A tree is a woody seed plant, but may include tree ferns or flowering plants with a stem or root having a thickness equal to or greater than a predetermined thickness.

[0015] In this specification, "adjacent" refers to a state in which adjacent objects are in contact, but may also include a state in which the objects are separated within a predetermined distance limit. The above objects may be movable property or immovable property.

[0016] <Description of Embodiment> Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals, and redundant descriptions are omitted as necessary for clarity of explanation. Note that the various characteristic matters shown in the following embodiments can be combined with each other.

[0017] 1. Configuration of Cutting Stock 1, Ground 2, and Laminated Body 3 First, the configuration of the cutting stock 1, the ground 2, and the laminated body 3 will be described. FIG. 1 is a schematic cross-sectional view showing a state in which the cutting stock treatment according to this embodiment is applied to the cutting stock of a felled tree. Specifically, FIG. 1 shows the cutting stock 1, the ground 2, and the laminated body 3 formed in the construction area around them.

[0018] [Cutting Stock 1] The stump 1 is a stump remaining after felling a tree growing adjacent to the ground 2. The stump 1 has a felling surface 11 and a side surface 12 as protruding surfaces protruding above the ground, that is, surfaces exposed above the ground in the state before stump treatment.

[0019] [Ground 2] The ground 2 is a surface adjacent to the stump 1. The ground 2 may be a paved surface or an unpaved surface. The paved surface is an asphalt pavement, but concrete paving, block paving, soil paving, wood paving, or other paving can also be used. Also, the ground may include concrete blocks, styrofoam blocks, or other blocks.

[0020] [Laminate 3] The laminate 3 of the present embodiment is as shown below. An adhesive layer containing asphalt formed in a construction area including the protruding surface of the stump and at least a part of the ground adjacent to the stump, A light-shielding sheet formed on the adhesive layer and welded to the surface of the adhesive layer And a laminate including the above.

[0021] That is, the laminate 3 is formed in the construction area. The construction area is an area including the protruding surface of the stump 1 and at least a part of the ground 2 adjacent to the stump 1. More specifically, the construction area includes the felling surface 11, the side surface 12, and at least a part of the area of the ground 2. The felling surface 11 is substantially parallel to the XY plane, and the side surface 12 extends along a direction substantially parallel to the Z-axis direction. That is, the laminate 3 is constructed following the rise of the stump. Note that the construction area preferably includes the side surface 12, but may not include a part or all of the side surface 12.

[0022] And the laminate 3 includes an adhesive layer 31 and a light-shielding sheet 32. Hereinafter, the elements constituting the laminate 3 will be described.

[0023] (Adhesive layer 31) The subsequent layer 31 is an adhesive layer formed by applying an adhesive containing a solvent and asphalt onto the construction area. The adhesive will be described in detail later. The adhesive layer 31 has the function of adhering the cut stock 1 and the ground surface 2 to the light-shielding sheet 32. In particular, since the adhesive layer 31 contains asphalt having adhesiveness, the adhesion to the cut stock 1 and the ground surface 2 is improved. When the ground surface 2 is an asphalt pavement surface, that is, when it contains the same or similar components as the adhesive layer 31, the adhesion between the ground surface 2 and the laminate 3 is further improved. Also, when the ground surface 2 is a pavement surface that can be dissolved in the solvent of the adhesive, such as an asphalt pavement surface, the adhesion is particularly improved because a part of the ground surface 2 is welded to the laminate 3. Also, as will be described later, since the light-shielding sheet 32 also contains asphalt like the adhesive layer 31, the adhesion between the adhesive layer 31 and the light-shielding sheet 32 is improved.

[0024] (Light-shielding sheet 32) The light-shielding sheet 32 is a sheet containing asphalt, which is formed on the adhesive layer 31. The upper surface of the adhesive layer 31 and the lower surface of the light-shielding sheet 32 are welded together by the solvent of the adhesive constituting the adhesive layer 31 and are integrated.

[0025] For example, as the light-shielding sheet 32, an asphalt sheet formed by forming a material mainly composed of asphalt into a sheet shape can be used. More specifically, an asphalt sheet formed by embedding a non-woven fabric or a net-like body as a core material in a rubber asphalt compound and forming it into a sheet shape can be used. The rubber asphalt compound may be impregnated into the core material and integrated. As the rubber asphalt compound, a mixture of asphalt such as petroleum asphalt, synthetic rubber, and fats and oils can be used. As the net-like body, a net woven from wire mesh, glass fiber, carbon fiber, or vinylon fiber can be used.

[0026] Furthermore, the light-shielding sheet 32 contains at least on its lower surface a portion soluble in a solvent. The portion soluble in the solvent may be an exposed portion of the asphalt. Instead of or in addition to this, the portion soluble in the solvent may be a portion where a synthetic resin layer is formed or a portion where synthetic resin powder adheres. As the synthetic resin, although not limited thereto, polystyrene, polyvinyl chloride, epoxy resin, or polypropylene can be used. The synthetic resin layer or powder dissolves in the solvent of the adhesive and has the effect of integrating with the adhesive layer 31. Also, the synthetic resin layer or powder has the effect of restricting the adhesiveness of the rubber asphalt compound and facilitating handling during transportation or when dealing with cut stocks. Note that the portion soluble in the solvent may be formed on a part or all of the lower surface of the light-shielding sheet 32. Also, the portion soluble in the solvent may be included on the upper surface or side surface.

[0027] The overall thickness of the light-shielding sheet 32 can be 0.5 mm to 7.0 mm, and for example, it can be 5.0 mm.

[0028] The light-shielding sheet 32 has light-shielding properties. That is, the light-shielding sheet 32 has the function of blocking light to the cut stocks and preventing photosynthesis. The light-shielding rate of the light-shielding sheet 32 can be 80% or more in order to surely prevent the photosynthesis of the cut stocks, preferably 90% or more, and particularly preferably 99% or more.

[0029] The light-shielding sheet 32 may be stretchable so as to follow the complex shape of the cut stocks 1. For example, the amount of stretch of the light-shielding sheet 32 at -10°C can be 2.0 mm or more, preferably 3.0 mm or more, and particularly preferably 10.0 mm or more. Note that the amount of stretch of the light-shielding sheet 32 at -10°C is the measured value of the amount of stretch by the tensile test in the "Handbook of Pavement Survey and Test Methods A102".

[0030] The light-shielding sheet 32 may have elasticity so as to follow the complex shape of the cut stock 1. For example, the initial penetration amount of a rigid ball needle with a mass of 27.5 g into the surface of the light-shielding sheet 32 when penetrated for 5 seconds may be 0.2 mm or more, preferably 0.5 mm or more, particularly preferably 0.8 mm or more. Also, the initial penetration amount may be 2.0 mm or less, preferably 1.5 mm or less, particularly preferably 1.0 mm or less in order to facilitate handling. The initial penetration amount of the rigid ball needle with a mass of 27.5 g when penetrated for 5 seconds is the measured value of the initial penetration amount by the elasticity test in the Pavement Survey and Test Method Manual A102.

[0031] The light-shielding sheet 32 may have resilience so as to closely adhere along the complex shape of the cut stock 1. For example, the recovery rate of the ball needle when a rigid ball needle with a mass of 27.5 g is penetrated into the surface of the light-shielding sheet 32 and allowed to recover for 20 seconds may be 40% or more, preferably 60% or more, particularly preferably 65% or more. The initial penetration amount of the rigid ball needle with a mass of 27.5 g when penetrated for 5 seconds is the measured value of the recovery rate by the elasticity test in the Pavement Survey and Test Method Manual A102.

[0032] In addition, it is desirable that the light-shielding sheet 32 has water resistance performance. Thereby, the intrusion of moisture into the ground can be prevented.

[0033] 2. Cut Stock Treatment In this section, the outline of the flow of cut stock treatment will be described with reference to the drawings. Note that the order of the treatments can be appropriately changed, a plurality of treatments may be executed simultaneously, or some of the treatments may be omitted.

[0034] [Outline of Cut Stock Treatment] Figure 2 is a flowchart showing an example of the process of stump treatment. First, the trees growing adjacent to the ground 2 are felled (S11). Next, the shape and size of the construction area are determined (S12). For example, the shape and size of the construction area may be determined based on at least one of the size and shape of the area where the roots of the trees spread, the material of the paving members forming the paving surface, and the presence or absence of a buffer material disposed between the paving members, the size and shape of the buffer material.

[0035] Next, an adhesive is applied to the construction area determined in S12 (S13). The adhesive contains asphalt and an organic solvent. The organic solvent is an organic solvent capable of dissolving the components contained in the lower surface of the light-shielding sheet 32. For example, the above components are asphalt and polystyrene. Also, the organic solvent may be an organic solvent capable of dissolving the components contained in the paving member. For example, the above component is asphalt. By this step, an adhesive layer 31 is formed on the construction area.

[0036] Next, before the adhesive layer 31 dries, the light-shielding sheet 32 is bonded onto the adhesive layer 31 (S14). Thereby, the upper surface of the adhesive layer 31 and the lower surface of the light-shielding sheet 32 can be welded by the organic solvent contained in the adhesive layer 31. By this step, a laminate in which the adhesive layer 31 and the light-shielding sheet 32 are integrated is formed. In order to adjust the fluidity of the adhesive layer 31 and facilitate the bonding of the light-shielding sheet 32, a pre-drying step of the adhesive layer 31 may be included between S13 and S14.

[0037] Next, the laminate formed in S14 is dried (S15). The drying method is natural drying, but other drying methods may also be used.

[0038] By disposing the adhesive layer 31 on the protruding surface of the cut-off stock 1 and the ground surface 2 in this way, the adhesion between the protruding surface of the cut-off stock 1 and the laminate 3 and the adhesion between the ground surface 2 and the laminate 3 can be improved. In particular, since the adhesive layer 31 contains asphalt having adhesiveness, the above-mentioned adhesion can be improved. By preventing peeling or displacement between the protruding surface of the cut-off stock 1 and the laminate 3 or between the ground surface 2 and the laminate 3, construction defects can be improved as compared with the above-described sheet type. Therefore, light to the raised cut-off stock 1 can be surely blocked, and photosynthesis can be prevented. Also, the supply of moisture to the roots of the cut-off stock 1 can be blocked. That is, the growth inhibition effect of the cut-off stock 1 can be improved. Also, since it can be constructed in a small area, the construction is simple.

[0039] In addition, since the upper surface of the adhesive layer 31 and the lower surface of the light-shielding sheet 32 are welded by the solvent of the adhesive to form the laminate 3, the adhesion between the adhesive layer 31 and the light-shielding sheet 32 can also be improved. By preventing peeling or displacement of the light-shielding sheet 32, construction defects in the treatment of the cut-off stock 1 can be improved. Therefore, light to the cut-off stock 1 can be surely blocked, and photosynthesis can be prevented. Also, the supply of moisture to the roots of the cut-off stock 1 can be blocked. That is, the growth inhibition effect of the cut-off stock 1 can be improved.

[0040] This cut-off stock treatment has a shorter construction time and lower costs compared with the above-described liquid pouring type. Also, it was difficult for the liquid pouring type to cover the raised cut-off stock 1, but since this cut-off stock treatment utilizes the bonding of the light-shielding sheet 32, it can flexibly respond to the raising of the cut-off stock 1. Note that the liquid pouring type cannot be applied to construction near rivers because there is concern about pollution of river water, whereas this cut-off stock treatment does not have a serious impact on river water and can be constructed even near rivers.

[0041] Also, this cut-off stock treatment is simple to construct because it can be constructed in a small area compared with the above-described roadbed type. Since this cut-off stock treatment utilizes the bonding of the light-shielding sheet 32, it can flexibly respond to the raising of the cut-off stock 1.

[0042] [Details of Cut-off Stock Treatment] (Adhesive) The adhesive used in S13 will be described. The adhesive contains asphalt and an organic solvent. The organic solvent includes an aromatic hydrocarbon-based organic solvent. For example, the organic solvent is at least one of benzene, toluene, and xylene.

[0043] For example, when the total amount of asphalt and the organic solvent is 100 parts by mass, asphalt can be 20 parts by mass or more and 80 parts by mass or less. As an example, when the total amount of the adhesive is 100 parts by mass, asphalt can be 20 parts by mass or more and 80 parts by mass or less. Also, when the total amount of asphalt and the organic solvent is 100 parts by mass, the organic solvent can be 20 parts by mass or more and 80 parts by mass or less. As an example, when the total amount of the adhesive is 100 parts by mass, the organic solvent can be 20 parts by mass or more and 80 parts by mass or less.

[0044] The adhesive may also contain a hydrocarbon resin. For example, the hydrocarbon resin is a petroleum resin. The petroleum resin is a hydrocarbon resin obtained by polymerizing a mixture of cracked oil fractions that are by-produced when petroleum is decomposed, and is a thermoplastic resin with a molecular weight of 2,000 or less. At this time, the petroleum resin can be 15 parts by mass or less, can also be 10 parts by mass or less, and can also be 5 parts by mass or less when the total amount of asphalt and the organic solvent is 100 parts by mass.

[0045] (Construction area) Next, the construction area determined in S12 will be described. FIGS. 3 to 6 are top views showing an example of the construction area R.

[0046] First, FIG. 3 will be described. The ground 2 shown in FIG. 3 shows a part of the road surface. The ground 2 includes an unpaved portion 200 and a paving member 201. The unpaved portion 200 is an area within the area where the paving member 201 exists and where the paving member 201 does not exist, and is formed so as to surround the periphery of the tree. For example, the unpaved portion 200 is caused by the roots of the grown tree pushing up the paving member 201 and breaking the paving member 201. The paving member 201 is an asphalt paving.

[0047] At this time, the construction area R is configured to cover the felling surface 11 of the cut stump 1, the unpaved portion 200, and a part of the paving member 201 in plan view. Note that the plan view is the viewpoint when looking at the XY plane from the positive Z-axis direction toward the negative Z-axis direction. Specifically, the distance x1 from the center C of the cut stump 1 in the construction area R to the end on the positive X-axis side is greater than the distance xc from the center C to the end on the positive X-axis side of the felling surface 11. Here, in order to enhance the adhesion between the ground 2 and the laminate 3 and prevent peeling, the distance x1 is preferably 1.3 times or more, more preferably 1.5 times or more, and particularly preferably 2.0 times or more the distance xc. Also, the distance x1 is greater than the distance from the center C to the end on the positive X-axis side of the unpaved portion 200. The same applies to the negative X-axis direction.

[0048] Also, the distance y1 from the center C in the construction area R to the end on the positive Y-axis side is greater than the distance yc from the center C to the end on the positive Y-axis side of the felling surface 11. Here, in order to enhance the adhesion between the ground 2 and the laminate 3 and prevent peeling, the distance y1 is preferably 1.3 times or more, more preferably 1.5 times or more, and particularly preferably 2.0 times or more the distance yc. Also, the distance y1 is greater than the distance from the center C to the end on the positive Y-axis side of the unpaved portion 200. The same applies to the negative Y-axis direction.

[0049] In this figure, the distance x1 is equal to the distance y1, but it may be greater than or less than the distance y1. Also, the construction area R shown in FIG. 3 is rectangular, but the shape is not limited to this and may be a circle, an ellipse, a polygon, or other shapes.

[0050] When it is possible to predict the area where the root of the stump 1 exists, the distances x1 and y1 may be determined so that the construction area R is larger than the area where the root exists. At this time, it is preferable that the distance x1 is larger than the distance from the center C to the end on the positive X-axis side of the area where the root exists. Also, it is preferable that the distance y1 is larger than the distance from the center C to the end on the positive Y-axis side of the area where the root exists. The same applies to the negative X-axis direction and the negative Y-axis direction.

[0051] Next, FIG. 4 will be described. The ground 2 included in the construction area R shown in FIG. 4 includes a plurality of paving members 201, 202 and a buffer member 211 disposed between the paving members. For example, the paving members 201, 202 are tiles or concrete blocks, and the buffer member 211 is a porous member for preventing cracks due to shrinkage or expansion of the paving members 201, 202. In FIG. 4, the buffer member 211 is arranged to extend in the X-axis direction.

[0052] In the ground 2 having such a structure, trees may grow by breaking through the buffer member 211 from below the buffer member 211 or by soil accumulating on the buffer member 211. And it has become a problem that the trees grow due to moisture penetrating from the buffer member 211 and moisture entering the ground.

[0053] At this time, the construction area R is configured to cover at least a part of the felling surface 11 of the stump 1, at least a part of the paving members 201, 202, and at least a part of the buffer member 211 in plan view.

[0054] When the buffer member 211 extends in the first direction, that is, the X-axis direction as shown in FIG. 4, in the construction area R, the distance x2 from the center C of the cut stump 1 to the end on the positive X-axis side is larger than the distance y2 from the center of the cut stump 1 to the end on the positive side of the second direction, that is, the positive Y-axis side. In this way, by expanding the construction area R in the direction along the buffer member 211 where moisture is likely to penetrate, the supply of moisture to the ground can be effectively reduced. Also, in the direction where the buffer member 211 does not exist, by narrowing the construction area R, the construction time can be shortened and the cost can be reduced. To enhance the above effects, the distance x2 is preferably 1.3 times or more, more preferably 1.5 times or more, and particularly preferably 2.0 times or more the distance y2.

[0055] When the area where the roots of the cut stump 1 exist can be predicted, the distances x2 and y2 may be determined such that the construction area R is larger than the area where the roots exist. At this time, it is preferable that the distance x2 is larger than the difference in distance from the end of the area where the roots exist compared to the distance y2. Thereby, the supply of moisture to the ground can be effectively reduced.

[0056] Next, FIG. 5 will be described. FIG. 5 is basically the same as FIG. 4, but is different from FIG. 4 in that the construction area R is composed of a plurality of construction areas with different sizes and the overall construction area R is smaller. Specifically, the construction area R shown in FIG. 5 is configured in a cross shape by combining the first area R1 and the second area R2.

[0057] The first area R1 is an area for covering the felling surface 11. The first area R1 is a rectangular area with a smaller width in the X-axis direction than the construction area R shown in FIG. 4. That is, the distance from the center C of the cut stump 1 to the end on the positive X-axis side in the first area R1 is x3 which is smaller than x2 in FIG. 4, and the distance from the center C of the cut stump 1 to the end on the positive Y-axis side in the first area R1 is the same y2 as in FIG. 4. Note that the distance x3 in the first area R1 is larger than the distance xc from the center C to the end on the positive X-axis side of the felling surface 11.

[0058] The second region R2 is a region for widely covering the buffer member 211 where moisture easily penetrates. The long axis direction of the second region R2 is the extending direction of the buffer member 211, that is, the X-axis direction. And the second region R2 is a rectangular region whose width in the Y-axis direction is smaller than that of the construction region R shown in FIG. 4. That is, the distance from the center C of the cut pile 1 in the second region R2 to the end on the positive X-axis side is x2 similar to FIG. 4, and the distance from the center C of the cut pile 1 in the second region R2 to the end on the positive Y-axis side is y3 which is smaller than y2 in FIG. 4. Therefore, the distance y3 in the second region R2 is smaller than the distance y2 in the first region R1. Note that the distance y3 in the second region R2 is larger than the distance yc from the center C to the end on the positive Y-axis side of the felling surface 11.

[0059] In this way, while widely covering the periphery of the buffer member 211 where moisture easily penetrates along the extending direction of the buffer member 211, by narrowing the width of the region away from the felling surface 11, it is possible to achieve both prevention of moisture supply to the ground and shortening of the construction time.

[0060] Next, FIG. 6 will be described. FIG. 6 is basically the same as FIG. 5, but is different from FIG. 5 in that it includes the paving members 203, 204 and the buffer member 212 extending along the Y-axis direction from the center C of the felling surface 11, and the construction region R includes the third region R3.

[0061] The long axis direction of the second region R2 is the extending direction of the buffer member 211, that is, the X-axis direction, while the long axis direction of the third region R3 is the extending direction of the buffer member 212, that is, the Y-axis direction. The distance from the center C of the cut pile 1 in the third region R3 to the end on the positive X-axis side is x4 which is smaller than x3 in FIG. 5, and the distance from the center C of the cut pile 1 in the third region R3 to the end on the positive Y-axis side is y4 which is larger than y2 in FIG. 5. Note that the third region R3 may have a shape obtained by rotating the second region R2 about 90° around the center C. In this way, even if there are buffer members in a plurality of directions, the same effect as in FIG. 5 can be obtained.

[0062] Although the present disclosure has been described with reference to the embodiments, the present disclosure is not limited thereto. Various changes can be made to the configuration and details of the present disclosure within the scope of the invention that can be understood by those skilled in the art.

[0063] For example, although the X-axis direction is taken as the first direction, the first direction is not limited thereto. Also, although the Y-axis direction is taken as the second direction, the second direction is not limited thereto. Further, the first direction and the second direction do not have to be in a substantially perpendicular relationship as long as they are different from each other.

[0064] Also, the center C does not have to be the exact center of the felling surface 11, and a predetermined amount of deviation may occur in the horizontal direction.

[0065] Also, in order to enhance the light-shielding property, a paint having a light-shielding property may be applied onto the laminate 3. Alternatively, in order to make the constructed part inconspicuous and maintain the appearance, a paint of the same color system as the ground 2 may be applied onto the laminate 3.

[0066] Also, the laminate 3 may be formed by repeatedly laminating an adhesive layer 31 and a light-shielding sheet 32. The number of repetitions can be appropriately set to improve durability.

[0067] Note that FIGS. 4 to 6 are examples where a buffer member 211 exists between the paving members 201 and 202. However, there may be a gap between the paving members 201 and 202 instead of or in addition to the buffer member 211. For example, when the paving members 201 and 202 are members having a thickness in the Z-axis direction, such as concrete blocks as an example, a gap is likely to occur between the paving members 201 and 202. At this time, more attention is paid to the intrusion of moisture from the side surface. Therefore, in order to prevent the intrusion of moisture from the side surface, a moisture barrier layer may be provided in at least a part of the gap.

[0068] Figs. 7 to 8 are perspective views showing an example of the moisture barrier layer 5. Fig. 7(a) shows an example of a top view of the periphery of the construction area R after the moisture barrier layer 5 and the laminate 3 are constructed. Fig. 7(b) shows a cross-sectional view taken along the line AA' of the periphery of the construction area R after the moisture barrier layer 5 and the laminate 3 are constructed. In Figs. 7(a) and (b), for easy understanding of the arrangement state of the moisture barrier layer 5, the adhesive layer 31 and the light-shielding sheet 32 are shown as transparent.

[0069] The area where the light-shielding sheet 32 exists in Fig. 7(a) is the same as the construction area R in Fig. 5. However, Fig. 7(a) is different from Fig. 5 in that a gap 4 extending in the X-axis direction is formed between the paving members 201 and 202. Then, in order to prevent the intrusion of moisture from the X-axis direction in which the gap 4 extends, a moisture barrier layer 5 that seals the YZ plane of the gap 4 is disposed at the ends on the positive X-axis side and the negative X-axis side in the construction area R with respect to the cut-off stake 1.

[0070] As the moisture barrier layer 5, a water-resistant sheet may be used. The thickness (length in the Y-axis direction) of the water-resistant sheet may be equal to or greater than the length in the Y-axis direction of the gap 4. Note that the water-resistant sheet may be a laminate of a plurality of sheets in the thickness direction, that is, in a direction perpendicular to the main surface. Thereby, the thickness can be easily adjusted according to the size of the gap 4. For example, the water-resistant sheet used for the moisture barrier layer 5 may be a laminate with the light-shielding sheet 32.

[0071] The water-resistant sheet is inserted into the gap 4 in a process before the adhesive is applied to the construction area R. Thereby, the moisture barrier layer 5 is formed. For example, a water-resistant sheet that is a laminate of a plurality of sheets may be inserted into the gap 4 such that the main surface is substantially parallel to the ZX plane and the lamination direction is the Y-axis direction. Here, when the thickness of the water-resistant sheet is larger than the length in the Y-axis direction of the gap 4, the water-resistant sheet may be compressed in the Y-axis direction and inserted into the gap 4. By inserting it after compression, a restoring force acts in the Y-axis direction after insertion, so that it is possible to prevent the water-resistant sheet from shifting in the X-axis direction or the Z-axis direction.

[0072] FIG. 8(a) shows an example of a top view of the periphery of the construction area R after the moisture barrier layer 5 and the laminate 3 are constructed, similar to FIG. 7(a). However, FIG. 8(a) is different from FIG. 7(a) in that the moisture barrier layer 5 is curved in the X-axis direction. Further, FIG. 8(b) shows a cross-sectional view taken along the line AA' of the periphery of the construction area R after the moisture barrier layer 5 and the laminate 3 are constructed, similar to FIG. 7(b).

[0073] In the example of FIG. 8, a water-resistant sheet is prepared in which at least one length of the main surface is longer than the length of the void 4 in the Y-axis direction. Then, the main surface of the water-resistant sheet is inserted into the void 4 so as to be substantially parallel to the YZ plane and the thickness direction is substantially parallel to the X-axis direction. At this time, a water-resistant sheet curved so that the central portion of the main surface of the water-resistant sheet in the Y-axis direction protrudes in the X-axis direction more than the end portion of the main surface in the Y-axis direction is inserted into the void 4. The protruding direction may be the direction from the insertion position of the water-resistant sheet toward the felling surface 11 in the X-axis direction. By inserting the water-resistant sheet curved in this way into the void 4, a restoring force acts after insertion, so that it is possible to prevent the water-resistant sheet from shifting in the X-axis direction or the Z-axis direction.

[0074] In FIGS. 7 to 8, although the moisture barrier layer 5 is provided when there is a void 4 between the paving members 201 and 202, the moisture barrier layer 5 may be similarly provided when there is a porous member that allows easy intrusion of moisture instead of the void 4. At this time, a step of removing the porous member is required for the portion where the moisture barrier layer 5 is provided.

[0075] Some or all of the above embodiments may be described as follows in the following supplementary notes, but are not limited thereto. (Supplementary Note 1) A step of applying an adhesive containing a solvent and asphalt to a construction area including the protruding surface of the cut stump and at least a part of the ground adjacent to the cut stump to form an adhesive layer; A step of bonding the upper surface of the adhesive layer and the lower surface of the light-shielding sheet to form a laminate including the adhesive layer and the light-shielding sheet, wherein the lower surface of the light-shielding sheet includes at least a portion soluble in the solvent; A step of drying the laminate A cutting stake treatment method comprising (Appendix 2) The light-shielding sheet is the cutting stake treatment method described in Appendix 1, which contains asphalt. (Appendix 3) The light-shielding sheet is the cutting stake treatment method described in Appendix 1 or 2, on at least the lower surface of which powder of a synthetic resin soluble in the solvent adheres. (Appendix 4) The adhesive contains an aromatic hydrocarbon-based organic solvent as the solvent, and is the cutting stake treatment method described in any one of Appendices 1 to 3. (Appendix 5) The tensile amount of the light-shielding sheet at -10°C is 2.0 mm or more, and it is the cutting stake treatment method described in any one of Appendices 1 to 4. (Appendix 6) The ground included in the construction area contains a plurality of paving members and a buffer member arranged between the paving members, and it is the cutting stake treatment method described in any one of Appendices 1 to 5. (Appendix 7) When the construction area includes the buffer member, The distance from the center of the cutting stake to the end in the first direction of the construction area is larger than the distance from the center of the cutting stake to the end in the second direction of the construction area, The first direction is the extending direction of the buffer member, The second direction is a direction different from the first direction The cutting stake treatment method described in Appendix 6. (Appendix 8) An adhesive layer containing asphalt, formed in a construction area including the protruding surface of the cutting stake and at least a part of the ground adjacent to the cutting stake, and A light-shielding sheet formed on the adhesive layer and welded to the surface of the adhesive layer A laminate including

Example

[0076] Hereinafter, the present disclosure will be described in more detail by way of examples and comparative examples. Note that the present disclosure is not limited by the following examples.

[0077] [Example 1: Adjustment of Adhesive] 20 parts by mass of petroleum asphalt and 80 parts by mass of xylene were mixed, and 5 parts by mass of kerosene was added to the mixture by external addition to obtain an adhesive.

[0078] (Treatment of Stump) The construction area was set to a 50 mm square centered on the felling surface of the stump of the felled tree so as to include the felling surface and the side surface of the stump and a part of the asphalt pavement surface. Then, the above-mentioned adhesive was applied to the construction area to obtain an adhesive layer. Next, before the solvent of the adhesive dried, a light-shielding sheet was slowly bonded along the bulge of the stump starting from one end of the surface of the adhesive layer to obtain a laminate. And the laminate was naturally dried.

[0079] (Evaluation of Adhesion) The stump subjected to the stump treatment was left outdoors for one year, and the adhesion between the ground 2 and the laminate 3 was visually confirmed. The evaluation was carried out according to the following criteria. 〇... No visual peeling was confirmed between the ground 2 and the laminate 3, and the displacement was less than 10 mm. ×... Visual peeling was confirmed between the ground 2 and the laminate 3, or there was a displacement of 10 mm or more.

[0080] (Growth Length) The stump subjected to the stump treatment was left outdoors for one year, and the growth length of the main trunk of the stump in one year was measured.

[0081] [Example 2] 80 parts by mass of petroleum asphalt and 20 parts by mass of xylene were mixed, and 5 parts by mass of kerosene was added to the mixture by external addition to obtain an adhesive. Then, the stump treatment was carried out in the same manner as in Example 1, and the adhesion and growth length were evaluated in the same manner as in Example 1.

[0082] [Comparative Example 1] The stump without the stump treatment was left outdoors for one year, and the growth length of the main trunk of the stump in one year was measured.

[0083] [Comparative Example 2] The construction area was set to a 50 mm square centered on the felling surface so as to include the felling surface and the side surface at the stump of the felled tree and a part of the asphalt pavement surface. Then, a light-shielding sheet was attached to the construction area and the four corners were fixed with pins. Thereafter, the stump treatment was carried out in the same manner as in Example 1, and the adhesion and growth length were evaluated in the same manner as in Example 1.

[0084] The results of this example are summarized in Table 1 below. As shown in Table 1, by improving the adhesion and reducing construction defects, it is possible to realize a stump treatment that can inhibit the growth of stumps.

[0085]

Table 1

Explanation of Signs

[0086] 1 Stump 11 Felling surface 12 Side surface 2 Ground 200 Unpaved part 201, 202, 203, 204 Pavement members 211, 212 Buffer members 3 Laminate 31 Adhesive layer 32 Light-shielding sheet R Construction area R1 First area R2 Second area R3 Third area

Claims

1. A step of applying an adhesive containing a solvent and asphalt to a construction area including a protruding surface of a cut pile and at least a part of the ground adjacent to the cut pile to form an adhesive layer; A step of bonding the upper surface of the adhesive layer and the lower surface of a light-shielding sheet to form a laminate including the adhesive layer and the light-shielding sheet, wherein the lower surface of the light-shielding sheet includes at least a portion soluble in the solvent; A step of drying the laminate A cut pile treatment method comprising the above steps.

2. The light-shielding sheet contains asphalt, and the cut pile treatment method according to Claim 1.

3. The light-shielding sheet has powder of a synthetic resin soluble in the solvent adhered thereto at least on the lower surface, and the cut pile treatment method according to Claim 1.

4. The adhesive contains an aromatic hydrocarbon-based organic solvent as the solvent, and the cut pile treatment method according to Claim 1.

5. The tensile amount of the light-shielding sheet at -10°C is 2.0 mm or more, and the cut pile treatment method according to Claim 1.

6. The ground included in the construction area includes a plurality of paving members and a buffer member disposed between the paving members, and the cut pile treatment method according to Claim 1.

7. When the construction area includes the buffer member, The distance from the center of the cut pile to the end in the first direction of the construction area is greater than the distance from the center of the cut pile to the end in the second direction of the construction area, The first direction is the extending direction of the buffer member, The second direction is a direction different from the first direction The cut pile treatment method according to Claim 6.

8. An adhesive layer containing asphalt formed in a construction area including a protruding surface of a cut pile and at least a part of the ground adjacent to the cut pile; A light-shielding sheet formed on the adhesive layer and welded to the surface of the adhesive layer A laminate comprising the above components.

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