Column fixing structure and column fixing method

Abstract

To provide a column fixing structure and a column fixing method that can appropriately set a height position of a column using a leveling rod and fix the column to the ground.SOLUTION: A column fixing structure fixes a column 10 to a hole 51 formed on the ground 50. A cylindrical member 20 forming a fixing hole 24 with an open top surface is installed into the hole 51. A lower end of the column 10 is inserted into the fixing hole 24 of the cylindrical member 20, and a leveling rod attached to the column 10 is placed on the top surface of the cylindrical member to set a height position of the column 10. An inner peripheral hardening material 40, which hardens after being injected in a fluid state, is filled between the column 10 and the cylindrical member 20. An outer peripheral hardening material 60, which hardens after being injected in a fluid state, is filled between an outer peripheral surface of the cylindrical member 20 and a side surface of the hole 51.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a column fixing structure and a column fixing method. [Background technology]

[0002] When inserting a fence post into a hole in a foundation block and filling it with mortar to secure the post, a known method involves placing a leveling rod passed through the fence post on the top surface of the foundation block to fix the fence post in its vertical position and then filling the hole with mortar (see, for example, Figure 7(b) of Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3497155 Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, when fixing fence posts to the ground, it is difficult to use the leveling rod to fix the posts in their vertical position. Specifically, when digging holes in the ground to place the posts and then injecting mortar or the like into the holes to fix the posts, the volume of the base of the posts, made of mortar or the like, must be large to prevent the posts from falling over due to wind pressure. Therefore, the opening dimensions of the holes in the ground must be larger than the holes in the foundation blocks, and the length of the leveling rod must also be increased accordingly. This creates a new problem: the center of the leveling rod bends downward due to the weight of the posts, causing variations in the height of the posts.

[0005] An object of the present invention is to provide a pillar fixing structure and a pillar fixing method that can appropriately set the height position of a pillar using a level rod and can fix the pillar to the ground. [Means for solving the problem]

[0006] The present invention is a pillar fixing structure for fixing a pillar in a hole formed in the ground, wherein a tubular member having a fixing hole with an open top is installed in the hole, the lower end of the pillar is inserted into the fixing hole, and a level rod attached to the pillar is placed on the top surface of the tubular member to set the height position, and an inner hardening material is filled between the pillar and the inner surface of the tubular member, which is injected in a fluid state and then hardens to fix the pillar, and an outer hardening material is filled between the outer surface of the tubular member and the side of the hole, which is injected in a fluid state and then hardens to fix the tubular member.

[0007] The present invention is a method for fixing a pillar in a hole formed in the ground, comprising: a hole construction step for forming a hole in the ground; an installation step for installing a tubular member having a fixing hole with an open top surface in the hole; a pillar insertion step for inserting the lower end of the pillar into the fixing hole of the tubular member and placing a level rod attached to the pillar on the top surface of the tubular member; and a hardening material filling step for filling an inner peripheral hardening material into the fixing hole of the tubular member, which is injected in a fluid state and then hardens to fix the pillar, and filling an outer peripheral hardening material between the outer peripheral surface of the tubular member and the side of the hole, which is injected in a fluid state and then hardens to fix the tubular member.

[0008] The present invention is a method for fixing a pillar in a hole formed in the ground, comprising: a pillar insertion step of inserting the lower end of the pillar into a fixing hole of a tubular member having an open top, and placing a level rod attached to the pillar on the top surface of the tubular member; a first hardened material filling step of filling the fixing hole of the tubular member with an inner-side hardened material that is injected in a fluid state and then hardens to fix the pillar; a hole construction step of forming a hole in the ground; an installation step of installing the tubular member, with the inner-side hardened material having the pillar fixed thereto after hardening, into the hole; and a second hardened material filling step of filling the space between the outer surface of the tubular member and the side of the hole with an outer-side hardened material that is injected in a fluid state and then hardens to fix the tubular member. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a pillar fixing structure and a pillar fixing method that can appropriately set the height position of a pillar using a level rod and can fix the pillar to the ground. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a view of a fence using the post fixing structure of the first embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing the pillar fixing structure of the first embodiment. [Figure 3] FIG. 4 is an explanatory diagram showing a method for fixing a pillar in the first embodiment. [Figure 4] FIG. 4 is an explanatory diagram showing a method for fixing a pillar in the first embodiment. [Figure 5] FIG. 4 is an explanatory diagram showing a method for fixing a pillar in the first embodiment. [Figure 6] FIG. 10 is an explanatory diagram showing a method for fixing a pillar in the second embodiment. [Figure 7] FIG. 10 is an explanatory diagram showing a method for fixing a pillar in the second embodiment. [Figure 8] FIG. 10 is an explanatory diagram showing a pillar fixing structure according to a third embodiment. [Figure 9] FIG. 10 is an explanatory diagram showing a method for fixing a pillar in the fourth embodiment. [Figure 10] FIG. 10 is an explanatory diagram showing a pillar fixing structure according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] [First embodiment] The pillar fixing structure of the first embodiment will be described below with reference to FIGS. 1 to 5. FIG. 1 is a view of a fence 1 using the post fixing structure of the first embodiment. The fence 1 comprises a fence main body 5 and posts 10 that support the fence main body 5. The fence body 5 is configured in a panel-like form by combining upper and lower furring strips, vertical frames, horizontal and vertical lattices, etc. The type of fence body 5 is not limited to the horizontal lattice type shown in Figure 1, but may be selected appropriately from vertical lattice type, horizontal privacy type, vertical privacy type, lattice type, polycarbonate panel type, etc. Each member of the fence body 5 is made of extruded aluminum alloy material, etc.

[0012] 2, the pillar 10 is inserted into the tubular member 20 and fixed by the inner circumferential hardened material 40. The tubular member 20 is placed in a hole 51 formed in the ground 50 and fixed by the outer circumferential hardened material 60. The pillar 10 is made of an aluminum alloy extruded member formed into a square tube shape, as shown in Figure 3. The pillar 10 has a through-hole 11 through which a leveling rod 15 is inserted. The leveling rod 15 is made of a round rod, and is detachably inserted into the through-hole 11 and protrudes from both side surfaces of the pillar 10. As shown in FIGS. 3 and 4, the level rod 15 is placed on the upper surface 23 of the cylindrical member 20 to set the height position of the pillar 10.

[0013] The tubular member 20 is, for example, a preformed base material such as a concrete block or a resin molded product, and is formed in a generally rectangular tubular shape with side portions 21 and a bottom portion 22, as shown in FIGS. 2 and 3. That is, the tubular member 20 has four side portions 21 arranged in a square shape in a plan view from above, and a bottom portion 22 that closes the bottom of a fixing hole 24 defined by these side portions 21. The height dimension of the tubular member 20 is set to a height dimension necessary for fixing the pillar 10. Furthermore, the dimension between the opposing side portions 21 of the tubular member 20, i.e., the opening dimension of the fixing hole 24, is set to a dimension that allows the pillar 10 to be inserted and allows the inner circumferential hardened material 40 that fixes the pillar 10 to be filled around the pillar 10.

[0014] A lid 30 is placed on the upper surface 23 of the cylindrical member 20. The lid 30 is a metal plate having holes formed therein through which the pillars 10 are inserted, and is configured to cover the upper surface of the inner periphery-side cured material 40. The lid 30 is formed with a thickness and structure that allows it to also close the through-holes 11 of the pillars 10. The lid 30 may be simply placed on the upper surface 23, or may be fixed to the pillars 10 with screws or the like, or may be fixed to the upper surface 23 of the cylindrical member 20 with an adhesive or the like.

[0015] The hole 51 formed in the ground 50 is set to a size that allows the tubular member 20 to be placed therein and that allows the outer peripheral hardened material 60 that fixes the tubular member 20 to be filled around the tubular member 20. In other words, the height of the hole 51 is set to match the height of the tubular member 20, and is set so that when the tubular member 20 is placed on the bottom surface 512 of the hole 51, the surface of the ground 50 and the upper surface 23 of the tubular member 20 are at approximately the same height. The side surfaces 511 of the hole 51 are configured with four side surfaces 511 so that the opening on the top surface is arranged in a square shape in a plan view. The opening dimensions of the hole 51, i.e., the dimension between the opposing side surfaces 511, are set to a dimension that allows the tubular member 20 to be placed and that allows the outer peripheral hardened material 60 that fixes the tubular member 20 to be filled around the tubular member 20. Note that in each drawing, the side surfaces 511 are depicted as vertical surfaces, but in reality, the side surfaces 511 may have unevenness that occurs when the hole 51 is dug. Bottom surface 512 of hole 51 is formed to be relatively flat so that cylindrical member 20 can be stably installed in the vertical direction by, for example, compacting bottom surface 512. Bottom surface 512 may also be formed to be flat by placing broken gravel or the like at the bottom of hole 51.

[0016] The inner circumference hardened material 40 is made of foamed urethane that can be injected in a fluid state into the fixing hole 24 of the tubular member 20, and then foamed and hardened to fix the pillar 10. The outer peripheral hardened material 60 is made of urethane foam that can fix the cylindrical member 20 by being injected into the hole 51 in a fluid state, and then foaming and hardening. That is, the inner circumference-side cured material 40 and the outer circumference-side cured material 60 are made of the same material, urethane foam. Urethane foam begins to foam when mixed and hardens after a predetermined time; the fluid state before hardening is defined as urethane resin, and the hardened state is defined as urethane foam.

[0017] The upper surface of the outer periphery-side hardened material 60 is lower than the surface of the ground 50 and the upper surface 23 of the tubular member 20, and the groove defined by the side surface 511 of the hole 51, the outer periphery of the side surface portion 21 of the tubular member 20, and the upper surface of the outer periphery-side hardened material 60 is filled with soil 70. Therefore, the upper surface of the outer periphery-side hardened material 60 is covered with soil 70.

[0018] Next, the process of constructing the fence 1 using the fixing structure of the posts 10 will be described with reference to FIGS. Since the cylindrical members 20 are made of concrete blocks or the like, they are formed in advance in a factory or the like and transported to the construction site of the fence 1. At the construction site of the fence 1, a hole construction step is carried out in which the ground 50 is dug and holes 51 are formed. Next, as shown in Fig. 3, an installation step is performed in which the tubular member 20 is installed in the hole 51, and a pillar insertion step is performed in which the lower end of the pillar 10 to which the leveling rod 15 is attached is inserted into the fixing hole 24 of the tubular member 20, and the leveling rod 15 is placed on the upper surface 23 of the tubular member 20, as shown in Fig. 4(A). At this time, as shown in Fig. 4(A), the lower end of the pillar 10 is open, and when the leveling rod 15 is placed on the upper surface 23 of the tubular member 20, the lower end of the pillar 10 is set to be positioned above the bottom surface 22 of the tubular member 20.

[0019] 4(A), a cured product filling step is carried out in which urethane resin is injected into fixing hole 24 from the top opening of fixing hole 24, and then injected into hole 51 from the opening between side surface portion 21 of tubular member 20 and side surface 511 of hole 51. Note that, because level rod 15 is disposed in the top opening of fixing hole 24, urethane resin may be injected from an opening other than the location where level rod 15 is disposed. As shown in Figure 4(B), the urethane resin injected into the fixing hole 24 fills from the opening at the bottom end of the pillar 10 to the inside of the pillar 10, and then foams and hardens. As a result, the fixing hole 24 and the inside of the pillar 10 are filled with an inner periphery side cured material 40, which is urethane foam. The amount of urethane resin injected into the fixing hole 24 is preset to an amount that will fill the fixing hole 24 up to the top surface when the urethane resin foams and hardens to become the inner periphery side cured material 40. Similarly, in hole 51, the urethane resin injected into the outer periphery of tubular member 20 also foams and hardens, filling hole 51 with urethane foam, that is, outer periphery-side cured material 60. The amount of urethane resin injected into hole 51 is set in advance so that when the urethane resin foams and hardens to become outer periphery-side cured material 60, it will fill hole 51 up to a predetermined height position that is lower than the top surface of hole 51.

[0020] After the urethane resin injected into the fixing holes 24 has hardened to a certain extent and is able to support the pillars 10, the level rods 15 are removed as shown in Figure 5(A). The pillars 10 are fixed to the tubular member 20 via the urethane foam, which is the inner circumferential hardened material 40. Next, as shown in Figure 5(B), the lid 30 is placed on the upper surface 23 of the cylindrical member 20. The lid 30 has an opening through which the pillar 10 is inserted, so it can be placed by inserting the lid 30 from the top end of the pillar 10 and moving it up to the upper surface 23. As a result, the upper surface of the inner periphery side hardened material 40 is covered with the lid 30, as shown in Figure 5(B). Furthermore, soil 70 is placed on top of the outer periphery side hardened material 60 to cover it. Thereafter, the fence body 5 is fixed to the posts 10 using brackets or the like. This completes the construction of the fence 1.

[0021] [Effects of the first embodiment] According to the first embodiment, the cylindrical member 20 is placed inside the hole 51 in the ground 50, and the leveling rod 15 attached to the pillar 10 can be placed on the upper surface 23 of the cylindrical member 20. Therefore, the length of the leveling rod 15 only needs to be set to match the opening size of the fixing hole 24, and does not need to be set to be greater than the opening size of the hole 51. This prevents the leveling rod 15 from bending and changing the height position of the pillar 10, allowing the height size of the pillar 10 to be set appropriately, and the pillar 10 can be fixed to the ground 50. The inner periphery of the tubular member 20 is filled with an inner periphery hardened material 40 to secure the pillar 10, and the outer periphery of the tubular member 20 placed in the hole 51 is filled with an outer periphery hardened material 60 to secure the tubular member 20. This allows for a larger volume of the inner periphery hardened material 40, tubular member 20, and outer periphery hardened material 60, which form the base for securing the pillar 10, improving the securing strength of the pillar 10 and the wind pressure resistance of the fence 1.

[0022] Because urethane foam is used for the inner periphery-side hardened material 40 and the outer periphery-side hardened material 60, the hardening time is shorter than when mortar is used, thereby shortening the construction period, and urethane resin is lighter and easier to handle than mortar, improving workability. Furthermore, because the inner periphery-side hardened material 40 and the outer periphery-side hardened material 60 are formed by injecting the same material, urethane resin, the urethane resin for each hardened material can be injected simultaneously after the tubular member 20 is installed in the hole 51, which also improves workability and shortens the construction period. The top surface of the inner periphery cured material 40 is covered with the lid 30, and the top surface of the outer periphery cured material 60 is covered with soil 70, so the inner periphery cured material 40 and the outer periphery cured material 60 made of urethane foam can be prevented from being exposed to the ground surface. This prevents the inner periphery cured material 40 and the outer periphery cured material 60 from being exposed to ultraviolet rays and other light and causing deterioration, improving weather resistance and the design of the fixing portion of the pillar 10.

[0023] By placing the level rod 15 on the upper surface 23 of the tubular member 20, the height position of the pillar 10 can be set, so that the lower end of the pillar 10 placed in the fixing hole 24 can be positioned at the height dimension required to fix the pillar 10. The inside of the pillar 10 can also be filled with the inner periphery hardened material 40, so that the inside and outside of the pillar 10 are filled with the inner periphery hardened material 40, thereby improving the fixing strength of the pillar 10. The inner circumference side hardened material 40 and the outer circumference side hardened material 60 are foamed urethane that fills the columns 10, fixing holes 24, and holes 51 by foaming, so the amount of resin used can be reduced and workability can be improved.

[0024] [Second embodiment] In the second embodiment, the fixing structure of the pillar 10 is the same as in the first embodiment, but the construction method is different. Therefore, the construction method of the second embodiment will be described with reference to Figs. 6 and 7. In the second embodiment, as shown in Figure 6(A), a pillar insertion process is performed in which the lower end of the pillar 10 is inserted into the fixing hole 24 of a pre-formed tubular member 20 and a level rod 15 is placed on the upper surface 23 of the tubular member 20. Next, a first hardened material filling step is carried out in which urethane resin is injected from the upper end opening of the fixing hole 24. The urethane resin injected into the fixing hole 24 fills from the opening at the lower end of the pillar 10 to the inside of the pillar 10, and foams and hardens, as shown in Figure 6(B). As a result, the fixing hole 24 and the inside of the pillar 10 are filled with an inner periphery side hardened material 40, which is urethane foam, and the pillar 10 is fixed to the tubular member 20 via the inner periphery side hardened material 40. Then, after the urethane resin injected into the fixing hole 24 has hardened to a certain extent and is able to support the pillar 10, the level rod 15 is removed.

[0025] Next, as shown in Figure 7(A), an installation process is carried out in which the tubular member 20, to which the inner hardened material 40 has hardened and the pillar 10 has been fixed, is installed in the hole 51 formed in the ground 50 by the hole construction process. 7(B), a second cured material filling step is carried out in which urethane resin is injected into the hole 51 from an opening between the side surface portion 21 of the tubular member 20 and the side surface 511 of the hole 51. The injected urethane resin then foams and hardens, filling the hole 51 with an outer peripheral cured material 60, which is urethane foam. Then, similarly to the first embodiment, the lid 30 is placed on the upper surface 23 of the cylindrical member 20, and the outer peripheral side hardened material 60 is covered with soil 70 to cover the outer peripheral side hardened material 60. Thereafter, the fence body 5 is fixed to the posts 10 using brackets or the like. This completes the construction of the fence 1.

[0026] [Effects of the second embodiment] According to the second embodiment, the fixing structure of the pillar 10 is the same as that of the first embodiment, and therefore the same effects as those of the first embodiment can be achieved. In the second embodiment, the first hardened product filling step is performed to fix the pillars 10 to the tubular member 20 with the inner circumferential hardened product 40, and then the tubular member 20 is placed in the hole 51, followed by the second hardened product filling step to fill the outer circumferential hardened product 60. This allows the steps of fixing the pillars 10 to the tubular member 20 and fixing the tubular member 20 in the hole 51 to be performed separately. This improves the flexibility of the work process and construction workability. For example, when constructing the fence 1, the schedule for fixing the pillars 10 to the tubular member 20 and the schedule for fixing the tubular members 20 in each hole 51 can be set separately, making it easy to adjust the work schedule. Furthermore, the inner circumferential cured material 40 and the outer circumferential cured material 60 may be made of different materials, and suitable materials can be selected for the inner circumferential cured material 40 and the outer circumferential cured material 60, respectively.

[0027] [Third embodiment] The pillar fixing structure of the third embodiment will be described with reference to FIG. The third embodiment differs from the first embodiment in that soil 70 is placed over the upper surfaces of the inner periphery-side hardened material 40 and the outer periphery-side hardened material 60. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals and will not be described. In the third embodiment, the inner periphery-side hardened material 40 is covered with soil 70, eliminating the need for a lid 30. On the other hand, as in the first embodiment, when filling the inner periphery-side hardened material 40 and the outer periphery-side hardened material 60 after installing the tubular member 20 in the hole 51, it is difficult to remove the leveling rod 15, so the soil 70 is applied while the leveling rod 15 is still attached. Note that, as in the second embodiment, when the pillar 10 is first fixed to the tubular member 20, the tubular member 20 can be installed in the hole 51 after removing the leveling rod 15, and therefore the soil 70 can be applied with the leveling rod 15 removed.

[0028] [Effects of the third embodiment] According to the third embodiment, the fixing structure of the pillar 10 is the same as that of the first embodiment, in that the pillar 10 is fixed to the fixing hole 24 of the tubular member 20 by the inner side hardened material 40, and the tubular member 20 is fixed to the hole 51 by the outer side hardened material 60, thereby achieving the same effects as those of the first embodiment. Furthermore, because soil 70 is placed over the top surfaces of the inner periphery cured material 40 and the outer periphery cured material 60, the inner periphery cured material 40 and the outer periphery cured material 60 are not exposed to the ground surface. This prevents the inner periphery cured material 40 and the outer periphery cured material 60, made of urethane foam, from being exposed to ultraviolet light and deteriorating, improving the weather resistance of each cured material. Furthermore, since there is no need to install a lid 30 to cover the inner periphery cured material 40, construction workability is improved and costs are reduced. Furthermore, because only soil 70 is exposed around the fixed portion of the pillar 10 buried in the ground, the fixed portion of the pillar 10 can be designed simply.

[0029] [Fourth embodiment] The pillar fixing structure of the fourth embodiment will be described with reference to FIGS. The fourth embodiment differs from the first embodiment in the structure of the cylindrical member 20B, but other configurations are the same, so the same reference numerals are used and the description will be omitted. The cylindrical member 20B does not have a bottom surface 22, but only has side surfaces 21. Therefore, the fixing holes 24 are formed by penetrating the cylindrical member 20B in the vertical direction. Furthermore, a holding groove 25 capable of holding the level rod 15 is formed on the upper surface 23 of the side surfaces 21, and each side surface 21 has a communication hole 26 that connects the fixing holes 24 inside the cylindrical member 20B with the outside.

[0030] In the fourth embodiment, as shown in Figure 9, after the tubular member 20B is installed in the hole 51 in the ground 50, the lower end of the pillar 10 is inserted into the fixing hole 24, and the level rod 15 attached to the pillar 10 is placed in the retaining groove 25. Then, urethane foam is injected into the fixing holes 24 on the inner periphery of the cylindrical member 20B and the holes 51 on the outer periphery of the cylindrical member 20B. Since the side surface 21 has communicating holes 26, the urethane foam injected into the fixing holes 24 and holes 51 also flows into and fills the communicating holes 26. As a result, as the injected urethane foam foams and hardens, the fixing holes 24 are filled with the inner-periphery-side hardened material 40, the holes 51 are filled with the outer-periphery-side hardened material 60, and the communicating holes 26 are filled with the connecting hardened material 80 that connects the inner-periphery-side hardened material 40 and the outer-periphery-side hardened material 60, as shown in FIG. 10 . In this embodiment, the top surface of the inner-periphery-side hardened material 40 is covered with the lid 30. However, as in the third embodiment, the top surface 23 of the cylindrical member 20B and the top surfaces of the inner-periphery-side hardened material 40 may be covered with soil 70, similar to the outer-periphery-side hardened material 60.

[0031] [Effects of the fourth embodiment] According to the fourth embodiment, it is possible to achieve the same effects as those of the first embodiment. Furthermore, since the communicating holes 26 are formed in the side surface portion 21 of the tubular member 20B, the connecting hardened material 80 that connects the inner periphery-side hardened material 40 and the outer periphery-side hardened material 60 can be filled into the communicating holes 26. The connecting hardened material 80 functions as an anchor that restricts the tubular member 20B from moving upward, thereby improving the fixing strength of the tubular member 20B, and therefore the fixing strength of the column 10. A holding groove 25 capable of holding a level rod 15 is formed on the upper surface 23 of the side portion 21, so that by placing the level rod 15 in the holding groove 25, the position of the level rod 15 can be regulated, the pillar 10 can be easily positioned at the center of the plane of the fixing hole 24, and the pillar 10 can be prevented from moving when the foamed urethane is injected. Since the cylindrical member 20B does not have a bottom surface portion 22, the amount of molding material such as concrete used to form the cylindrical member 20B can be reduced, resulting in a reduction in weight and cost.

[0032] [Variations] The present invention is not limited to a fixing structure for the posts 10 used as supports for the fence 1, but can also be used as a fixing structure for various posts and supports installed outdoors, such as supports for mailboxes and delivery boxes. The inner periphery-side cured material 40, the outer periphery-side cured material 60, and the connecting cured material 80 are not limited to those made of urethane foam, but may be made of a non-foaming resin material. That is, they may be made of a resin material such as epoxy resin or urethane resin that can be injected into the fixing holes 24 or the holes 51 in a fluid state and then hardens. Furthermore, the inner periphery-side cured material 40, the outer periphery-side cured material 60, and the connecting cured material 80 are not limited to resin materials, but may be mortar, etc.

[0033] The cylindrical members 20, 20B are not limited to concrete blocks or resin molded products, but may be any member that can fix the pillar 10 to the ground 50 using the inner periphery side hardened material 40 and the outer periphery side hardened material 60. The lid 30 is not limited to being made of metal, but may be made of synthetic resin or concrete. The lid 30 may also be formed with a drainage hole for draining water that has seeped in between the lid 30 and the inner periphery-side hardened material 40. Furthermore, the lid 30 is not limited to being a single lid formed with an opening through which the pillar 10 is inserted, but may be made up of two or more divided lids arranged with the pillar 10 sandwiched between them.

[0034] The pillar 10 may be configured so that a through hole is formed on the side of the lower end that is inserted into the fixing hole 24, and the inner peripheral hardened material 40 that is filled inside and outside the pillar 10 also fills the through hole portion. The pillar 10 is not limited to a rectangular tubular shape, but may be a cylindrical pillar, or may be a solid pillar instead of a hollow tubular shape, or may be a pillar with an L-shaped or H-shaped cross section. The cylindrical members 20, 20B are also not limited to a rectangular tubular shape, but may be cylindrical. Furthermore, the hole 51 is not limited to a rectangular hole in plan view, but may be a circular hole in plan view.

[0035] [Summary of the invention] The pillar fixing structure of the present invention is a pillar fixing structure for fixing a pillar in a hole formed in the ground, wherein a tubular member having a fixing hole with an open top is installed in the hole, the lower end of the pillar is inserted into the fixing hole, and a level rod attached to the pillar is placed on the top surface of the tubular member to set the height position, and an inner peripheral hardening material is filled between the pillar and the inner peripheral surface of the tubular member, which is injected in a fluid state and then hardens to fix the pillar, and an outer peripheral hardening material is filled between the outer peripheral surface of the tubular member and the side of the hole, which is injected in a fluid state and then hardens to fix the tubular member. According to this invention, the height of the pillar is set by placing a cylindrical member in a hole in the ground and placing a leveling rod attached to a pillar on the top surface of the cylindrical member, so the length of the leveling rod only needs to be set to match the opening size of the fixing hole in the cylindrical member, and there is no need to set it longer than the opening size of the hole in the ground. This prevents the leveling rod from bending and changing the height of the pillar, allows the height of the pillar to be set appropriately, and allows the pillar to be fixed to the ground. The inner periphery of the tubular member is filled with an inner hardened material to fix the pillar, and the outer periphery of the tubular member placed in the hole is filled with an outer hardened material to fix the tubular member. This allows for a larger volume of the inner hardened material, tubular member, and outer hardened material that form the base for fixing the pillar, improving the fixing strength of the pillar and also improving the pillar's wind pressure resistance.

[0036] In the pillar fixing structure of the present invention, a lid covering the upper surface of the inner hardened material may be placed on the upper surface of the cylindrical member, and the upper surface of the outer hardened material may be covered with soil. According to the present invention, the upper surface of the inner periphery hardened material is covered with a lid, and the upper surface of the outer periphery hardened material is covered with soil, which prevents the inner periphery hardened material and the outer periphery hardened material from being exposed to the ground surface, thereby improving the weather resistance of the inner periphery hardened material and the design of the fixing part of the pillar.

[0037] In the pillar fixing structure of the present invention, the upper surfaces of the tubular member, the inner circumference side hardened material and the outer circumference side hardened material may be covered with soil. According to the present invention, soil is covered on the top surfaces of the tubular member, the inner hardened material, and the outer hardened material, preventing the inner hardened material and the outer hardened material from being exposed to the ground surface. This improves the weather resistance of the inner hardened material and the outer hardened material, and also improves the design of the fixed portion of the pillar. Furthermore, since there is no need to install a lid to cover the inner hardened material, construction workability is improved and costs are reduced. Furthermore, since only soil is exposed around the fixed portion of the pillar buried in the ground, the fixed portion of the pillar can be designed simply.

[0038] In the pillar fixing structure of the present invention, the tubular member has a side portion that defines the fixing hole, and the side portion has a communicating hole that connects the fixing hole to the outer periphery of the side portion, and the communicating hole may be filled with a connecting hardened material that connects the inner periphery side hardened material and the outer periphery side hardened material. According to the present invention, since the tubular member has a communicating hole in its side surface, the connecting hardened material that connects the inner and outer circumferential hardened materials can be filled into the communicating hole. The connecting hardened material functions as an anchor that prevents the tubular member from moving upward, thereby improving the fixing strength of the tubular member, i.e., the fixing strength of the column.

[0039] In the pillar fixing structure of the present invention, the pillar may be formed in a hollow cylindrical shape, the lower end of the pillar may be positioned above the bottom of the fixing hole, and an opening may be formed inside the pillar for filling the inner peripheral hardened material. According to the present invention, the inside of the pillar can also be filled with the inner circumferential hardened material, so that the inside and outside of the pillar are filled with the inner circumferential hardened material, thereby improving the fixing strength of the pillar.

[0040] In the pillar fixing structure of the present invention, the inner periphery side cured material and the outer periphery side cured material are preferably made of urethane foam. According to the present invention, the inner peripheral hardened material and the outer peripheral hardened material are made of urethane foam, which shortens the hardening time and construction period compared to when mortar is used, and also improves workability because urethane resin is lighter and easier to handle than mortar.

[0041] In the pillar fixing structure of the present invention, a holding groove may be formed on the upper surface of the cylindrical member, in which the level rod is placed and held. According to the present invention, a holding groove capable of holding a level rod is formed on the upper surface of the tubular member, thereby regulating the position of the level rod, making it easy to position the pillar at the planar center position of the fixing hole, and preventing the pillar from moving when the foamed urethane is injected.

[0042] The present invention is a method for fixing a pillar in a hole formed in the ground, comprising: a hole construction step for forming a hole in the ground; an installation step for installing a tubular member having a fixing hole with an open top surface in the hole; a pillar insertion step for inserting the lower end of the pillar into the fixing hole of the tubular member and placing a level rod attached to the pillar on the top surface of the tubular member; and a hardening material filling step for filling an inner peripheral hardening material into the fixing hole of the tubular member, which is injected in a fluid state and then hardens to fix the pillar, and filling an outer peripheral hardening material between the outer peripheral surface of the tubular member and the side of the hole, which is injected in a fluid state and then hardens to fix the tubular member. According to the present invention, the above-mentioned pillar fixing structure can be realized, which prevents the level rod from bending and changing the height of the pillar, allows the pillar height to be set appropriately, and allows the pillar to be fixed to the ground.In addition, the volumes of the inner circumferential hardened material, tubular member, and outer circumferential hardened material, which form the base for fixing the pillar, can be increased, improving the fixing strength of the pillar and the wind pressure resistance of the pillar. Furthermore, after the tubular member is installed in the hole, the inner and outer circumferential cured materials are filled in the cured material filling process, so the urethane resin injection work for each cured material can be carried out simultaneously, improving workability.

[0043] In the pillar fixing method of the present invention, the tubular member has a side portion that defines the fixing hole, and the side portion has a communicating hole that connects the fixing hole to the outer periphery of the side portion, and it is preferable that the hardened material filling step, in addition to filling the inner periphery side hardened material and the outer periphery side hardened material, also fills the communicating hole of the tubular member with a connecting hardened material that connects the inner periphery side hardened material and the outer periphery side hardened material. According to the present invention, in the cured material filling step, in addition to filling the inner and outer cured materials, a connecting cured material that connects the inner and outer cured materials can be filled into the communicating holes in the side surface of the tubular member. The connecting cured material functions as an anchor that prevents the tubular member from moving upward, thereby improving the fixing strength of the tubular member, that is, the fixing strength of the column.

[0044] The present invention is a method for fixing a pillar in a hole formed in the ground, comprising: a pillar insertion step of inserting the lower end of the pillar into a fixing hole of a tubular member having an open top, and placing a level rod attached to the pillar on the top surface of the tubular member; a first hardened material filling step of filling the fixing hole of the tubular member with an inner-side hardened material that is injected in a fluid state and then hardens to fix the pillar; a hole construction step of forming a hole in the ground; an installation step of installing the tubular member, with the inner-side hardened material having the pillar fixed thereto after hardening, into the hole; and a second hardened material filling step of filling the space between the outer surface of the tubular member and the side of the hole with an outer-side hardened material that is injected in a fluid state and then hardens to fix the tubular member. According to the present invention, the above-mentioned pillar fixing structure can be realized, which prevents the level rod from bending and changing the height of the pillar, allows the pillar height to be set appropriately, and allows the pillar to be fixed to the ground.In addition, the volumes of the inner circumferential hardened material, tubular member, and outer circumferential hardened material, which form the base for fixing the pillar, can be increased, improving the fixing strength of the pillar and the wind pressure resistance of the pillar. Furthermore, since the first and second hardened product filling steps are carried out separately, the flexibility of the work process is improved, and the workability of the construction is improved. Furthermore, the inner and outer circumferential hardened products can be made of different materials. [Explanation of symbols]

[0045] 1...fence, 5...fence body, 10...post, 11...through hole, 15...level bar, 20...cylindrical member, 20B...cylindrical member, 21...side portion, 22...bottom portion, 23...top surface, 24...fixing hole, 25...retaining groove, 26...communicating hole, 30...lid, 40...inner hardened material, 50...ground, 51...hole, 60...outer hardened material, 70...soil, 80...connected hardened material, 511...side, 512...bottom surface.

Claims

1. A pole fixing structure for fixing a pole in a hole formed in the ground, A cylindrical member having a fixing hole with an open top surface is placed in the hole, The lower end of the pillar is inserted into the fixing hole, The height position of the pillar is set by placing a level rod attached to the pillar on the upper surface of the cylindrical member, and an inner peripheral hardening material is filled between the pillar and the inner peripheral surface of the cylindrical member, the inner peripheral hardening material being injected in a fluid state and then hardening to fix the pillar, The space between the outer peripheral surface of the cylindrical member and the side surface of the hole is filled with an outer peripheral hardening material that is injected in a fluid state and then hardens to fix the cylindrical member. A column fixing structure characterized by:

2. The column fixing structure according to claim 1, a lid for covering an upper surface of the inner circumferential side cured material is disposed on an upper surface of the cylindrical member; The upper surface of the outer peripheral hardened material is covered with soil. A column fixing structure characterized by:

3. The column fixing structure according to claim 1, The upper surfaces of the cylindrical member, the inner circumferential side hardened material, and the outer circumferential side hardened material are covered with soil. A column fixing structure characterized by:

4. The column fixing structure according to claim 1, the cylindrical member has a side surface that defines the fixing hole, a communication hole is formed in the side surface portion, the communication hole communicating with the fixing hole and the outer periphery of the side surface portion; The communication holes are filled with a connecting cured material that connects the inner peripheral side cured material and the outer peripheral side cured material. A column fixing structure characterized by:

5. The column fixing structure according to claim 1, The pillar is formed in a hollow cylindrical shape, The lower end of the pillar is disposed above the bottom of the fixing hole, and an opening for filling the inner circumferential side hardened material is formed inside the pillar. A column fixing structure characterized by:

6. The column fixing structure according to claim 1, The inner circumferential side cured material and the outer circumferential side cured material are made of urethane foam. A column fixing structure characterized by:

7. The column fixing structure according to claim 1, A holding groove is formed on the upper surface of the cylindrical member, in which the level rod is placed and held. A column fixing structure characterized by:

8. A method for fixing a pole in a hole formed in the ground, comprising: a hole construction step of forming a hole in the ground; an installation step of installing a cylindrical member having a fixing hole with an open top surface in the hole; a pillar inserting step of inserting a lower end of the pillar into the fixing hole of the tubular member and placing a level rod attached to the pillar on an upper surface of the tubular member; a hardening material filling process for filling an inner peripheral hardening material into the fixing hole of the tubular member, which is injected in a fluid state and then hardens to fix the pillar, and filling an outer peripheral hardening material between the outer peripheral surface of the tubular member and the side of the hole, which is injected in a fluid state and then hardens to fix the tubular member; A method for fixing a pillar, comprising:

9. The method for fixing a pole according to claim 8, the cylindrical member has a side surface portion that defines the fixing hole, and a communication hole that communicates the fixing hole with an outer circumferential side of the side surface portion is formed in the side surface portion, The cured material filling step includes filling the inner circumferential side cured material and the outer circumferential side cured material with a connecting cured material that connects the inner circumferential side cured material and the outer circumferential side cured material into the communicating holes of the cylindrical member. A method for fixing a column.

10. A method for fixing a pole in a hole formed in the ground, comprising: a pillar insertion step of inserting a lower end of the pillar into a fixing hole of a cylindrical member having an opening at the top surface thereof, and placing a level rod attached to the pillar on the top surface of the cylindrical member; a first hardened material filling step of filling the fixing hole of the cylindrical member with an inner peripheral hardened material that is injected in a fluid state and then hardens to fix the pillar; a hole construction step of forming a hole in the ground; an installation step of installing the cylindrical member, to which the pillars are fixed by hardening the inner circumferential hardened material, in the hole; a second hardened material filling step of filling an outer peripheral side hardened material between the outer peripheral surface of the cylindrical member and the side surface of the hole, the outer peripheral side hardened material being injected in a fluid state and then hardening to fix the cylindrical member; A method for fixing a pillar, comprising:

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