JP7817690B2 - Foundation structure for carport, solar carport, construction method for foundation structure for carport, and guide plate for pin foundation construction method - Google Patents

Description

The present invention relates to a carport foundation structure, a solar carport, a construction method for a carport foundation structure, and a guide plate for the pin foundation construction method.

Because carports are buildings, their foundation structures must meet the specifications set forth in the Building Standards Act. Carport foundation structures that use reinforced concrete are commonly known. Foundation structures that use reinforced concrete require tedious work, such as processing the rebar, assembling and dismantling the formwork, which lengthens the construction period. Patent Documents 1 and 2 disclose a solar carport foundation structure in which multiple piles driven into the base of the excavation are connected to long H-shaped steel beams and concrete is poured into them, in order to shorten the construction period.

One foundation construction method using pile foundations is the pin foundation method. In this method, steel pipe piles (pins) are driven diagonally into the ground or the bottom of an excavation, and the resulting bearing capacity supports the structure. Patent Document 3 discloses a building foundation construction method using the pin foundation method, which is easy to construct and can shorten the construction period.

JP 2016-044495 A Japanese Patent Application Laid-Open No. 2019-073876 Japanese Patent Application Laid-Open No. 2019-210708

With the spread of decarbonized management, there is growing demand for installing solar carports in existing parking lots at convenience stores and other commercial facilities. When installing a solar carport in an existing parking lot, an area within the parking lot where the foundation structure will be placed is excavated (hereinafter simply referred to as the "excavation area"). If the excavation area is extensive, restrictions on parking lot use during construction may occur, and the excavation may result in the disappearance of lot lines. For this reason, there is a demand for further shortening of construction periods and reduction of excavation areas.

Furthermore, when the carport roof is blown by the wind, a force is applied to the carport foundation in a direction that tends to pull out the carport's supports. Therefore, to ensure safety, carport foundations are required to have the strength to withstand the support posts being pulled out (hereinafter sometimes simply referred to as "pull-out strength").

When installing a solar carport in an existing parking lot, the solar carport's support pillars are often placed near the lot lines. The solar carport foundation structures in Patent Documents 1 and 2 can require extensive root excavation areas to accommodate the long H-shaped steel beams. This could increase the cost of re-establishing lot lines and the scope of parking lot usage restrictions.

The construction method of Patent Document 3 makes it possible to shorten construction time and reduce the area that needs to be excavated. Furthermore, building foundations constructed using the construction method of Patent Document 3 have a high bearing capacity for structures. However, there is a risk that building foundations constructed using the construction method of Patent Document 3 may not meet the pull-out strength required for carport foundations.

The present invention therefore aims to provide a carport foundation structure that has excellent pull-out strength and bearing capacity, and a construction method for the same, which allows for a shorter construction period and reduces the area that needs to be excavated. Another object of the present invention is to provide a solar carport equipped with the above-mentioned carport foundation structure. A further object of the present invention is to provide a guide plate for the pin foundation construction method, which is used in carport foundation structures in which unhardened concrete is poured.

(1) The carport foundation structure of the present invention is
A plurality of piles that are driven in with their upper ends protruding from the bottom of the excavation;
a support base plate provided at an end of the support;
A guide plate having a guide tube portion into which the pile is inserted and arranged at the bottom of the excavation;
a fixture for fixing the support base plate and the guide plate;
and hardened concrete above the root cut bottom,
The guide tube portion is configured so that the driving direction of the pile driven into the root excavation bottom is in a twisted positional relationship with, and away from, the center line of the support pillar, which is fixed to the guide plate by the fixing device via the support pillar base plate.

The carport foundation structure of the present invention shortens construction time, reduces the area that needs to be excavated, and has excellent pull-out strength and bearing capacity.

(2) Preferably, the guide plate is
an even number of the guide tube portions;
The pair of guide tube portions are configured to be positioned symmetrically with respect to the point where the center line intersects with the guide plate.

This allows the piles to be driven into the excavation base in a balanced manner, using the center line of the support as a reference, via the guide plate. As a result, the pull-out strength and bearing capacity of the carport foundation structure are improved.

(3) Preferably, the guide tube portion is configured so that the driving direction is at an angle of 50° or more and 70° or less relative to the root cutting bottom.

This improves the pull-out strength and support capacity of the carport foundation structure.

(4) Preferably, the guide tube portion is configured so that the driving direction of all the piles is at the same angle relative to the excavation bottom.

This allows the pull-out strength and bearing capacity of the piles driven into the bottom of the excavation to be balanced with respect to the center line of the support pillar. As a result, the pull-out strength and bearing capacity of the carport foundation structure are improved.

(5) Preferably, the guide tube portions are configured so that the driving directions of the piles inserted into each of the pair of guide tube portions are point-symmetric with respect to the center of the target.

This allows the pull-out strength and bearing capacity of the piles driven into the bottom of the excavation to be balanced with respect to the center line of the support pillar. As a result, the pull-out strength and bearing capacity of the carport foundation structure are improved.

(6) Preferably, the carport foundation structure includes eight of the above-mentioned piles.

This improves the pull-out strength and support capacity of the carport foundation structure.

(7) Preferably, the length of the pile is 1.5 m or more and 4.5 m or less.

This reduces the load of driving the piles while maintaining the pull-out strength and bearing capacity of the carport foundation structure.

(8) Preferably, the fixing device has an adjustment portion for adjusting the angle of the support pole relative to the ground on which it is installed.

This reduces the load on the ground on which the support poles are installed when vertically adjusting them.

(9) Preferably, the width, depth, and height of the hardened concrete are each 400 mm or more and 740 mm or less.

This allows the area that needs to be excavated to be further reduced while maintaining the excellent pull-out strength and support capacity of the carport foundation structure.

(10) Preferably, the hardened concrete is
Width is between 420mm and 540mm,
The depth is between 420mm and 540mm, and the height is between 450mm and 530mm.

This further reduces the area that needs to be excavated for the carport foundation structure.

(11) Preferably, the above-mentioned carport foundation structure is applied to a solar carport.

The above-mentioned carport foundation structure has excellent pull-out strength and bearing capacity. Therefore, the above-mentioned carport foundation structure is suitable as a foundation for a solar carport.

(12) The construction method for the carport foundation structure in (1) above is as follows:
A root cutting process of excavating a hole having a width, a length, and a depth of 400 mm or more and 740 mm or less;
a fixing step of fixing the support base plate and the guide plate with the fixing tool;
An arrangement step of arranging the guide plate to which the support base plate is fixed at the root cutting bottom;
an insertion step of inserting the pile into the guide tube portion;
A driving step of driving the pile inserted into the guide tube portion into the root cutting bottom;
a pouring step of pouring unhardened concrete into the hole;
Includes.

This allows for shorter construction times, reduced root excavation areas, and the construction of carport foundation structures with excellent pull-out strength and bearing capacity.

(13) The construction method for the carport foundation structure in (8) above is as follows:
A root cutting process of excavating a hole having a width, a length, and a depth of 400 mm or more and 740 mm or less;
a fixing step of fixing the support base plate and the guide plate with the fixing tool;
An arrangement step of arranging the guide plate to which the support base plate is fixed at the root cutting bottom;
an adjustment step of adjusting the angle of the support pole with respect to the ground by the adjustment portion of the fixing tool;
an insertion step of inserting the pile into the guide tube portion;
A driving step of driving the pile inserted into the guide tube portion into the root cutting bottom;
a pouring step of pouring unhardened concrete into the hole;
Includes.

This shortens construction time, reduces the area that needs to be excavated, and allows for the construction of a carport foundation structure with excellent pull-out strength and bearing capacity. It also reduces the load on the ground on which the posts are installed when vertically aligning the posts.

(14) The guide plate for the pin foundation method used in the carport foundation structure to which the unhardened concrete of the present invention is poured is
a fixing hole provided at the end of the support pole for fixing the support pole base plate with a fixing tool;
A guide tube portion into which a plurality of piles are inserted so that their upper ends protrude from the bottom of the excavation.
A peg hole for driving a peg into the root cutting bottom,
The guide tube portion is configured so that the driving direction of the pile driven into the root excavation bottom is in a twisted positional relationship with and away from the center line of the support pillar, which is fixed to the guide plate by the fixing device via the support pillar base plate.

This makes it easy to position the excavated base, enabling the construction of a carport foundation structure with excellent pull-out strength and bearing capacity.

(15) Preferably, the guide tube portion is configured so that the driving directions are in a twisted positional relationship.

This prevents the piles from coming into contact with each other when they are inserted into the guide tube portion.

(16) Preferably, the above-mentioned guide plate for the pin foundation construction method is applied to a solar carport.

The above-mentioned guide plate for the pin foundation construction method enables the construction of a carport foundation structure with excellent pull-out strength and bearing capacity. Therefore, the above-mentioned guide plate for the pin foundation construction method is ideal for solar carport foundation structures.

The present invention provides a carport foundation structure and construction method that can shorten construction time and reduce the area that needs to be excavated, while also having excellent pull-out strength and bearing capacity. The present invention also provides a solar carport equipped with the above-mentioned carport foundation structure. Furthermore, the present invention also provides a guide plate for the pin foundation construction method, which is used in carport foundation structures in which unhardened concrete is poured.

FIG. 2 is a side view showing the foundation structure according to the first embodiment. FIG. 2 is a plan view of the base structure of FIG. 1; FIG. 10 is a side view of the support base plate and guide plate fixed by the fasteners. FIG. FIG. FIG. FIG. 10 is a side view of the guide plate showing a state in which a pile is inserted into the guide tube portion. FIG. 10 is a plan view of the guide plate showing a state in which a pile is inserted into the guide tube portion. FIG. 10 is a side view showing a foundation structure according to a second embodiment. FIG. 10 is a side view of the support base plate and guide plate fixed by a fixture having an adjustment portion. FIG. 10 is a flow diagram of a construction method for a foundation structure according to a second embodiment. 1A to 1C are diagrams showing the steps of a root cutting process, a fixing process, a placement process, and an adjustment process. 10A and 10B are diagrams showing the state of each of the steps of an inserting step, a driving step, and a non-insertion checking step. 1 is a diagram showing the steps of a pouring process and a paving process. FIG.

[Embodiment]
Hereinafter, a foundation structure 10 according to a first embodiment of the present invention, a foundation structure 20 according to a second embodiment, and a construction method for the foundation structure 20 will be described.

[Configuration of base structure 10]
The foundation structure 10 is a foundation structure for a solar carport. A foundation structure for a solar carport is required to have a high bearing capacity. Therefore, the foundation structure for a solar carport can also be used as a foundation structure for a carport. FIG. 1 is a side view showing the foundation structure 10. The two double-headed arrows shown in FIG. 1 indicate the height direction and width direction of the foundation structure 10. FIG. 2 is a plan view of the foundation structure 10 of FIG. 1 as seen from above. The two double-headed arrows shown in FIG. 2 indicate the depth direction and width direction of the foundation structure 10, respectively.

The foundation structure 10 comprises a guide plate 100, a support column 200, a fixing device 300, piles 400, and hardened concrete 500. The guide plate 100 is placed on the excavation base EB. The support column 200 has a support column base plate 210 attached to its end. The support column base plate 210 and the guide plate 100 are fixed with fixing devices 300. As a result, the support column 200 is fixed to the guide plate 100 via the support column base plate 210. The guide plate 100 has a guide tube portion 110 into which the pile 400 is inserted. The pile 400 passes through the guide tube portion 110 and is driven obliquely into the excavation base EB. As a result, the guide plate 100 is fixed to the excavation base EB. The pile 400 is driven into the excavation base EB so that a portion of the pile 400 protrudes above the excavation base EB. The hardened concrete 500 is located above the excavation bottom EB. The hardened concrete 500 includes the guide plate 100, the portion of the support 200 from the ground GD to the support base plate 210, the fixture 300, and the pile 400, which are located above the excavation bottom EB.

[Configuration of the pile 400]
The foundation structure 10 has eight piles 400. The piles 400 are metal pipes. In this embodiment, the piles 400 are steel pipes. The diameter of the piles 400 is 40 mm or more and 65 mm or less. In this embodiment, the diameter of the piles 400 is 48.6 mm. If the diameter of the piles 400 is 40 mm or more, the pull-out strength and bearing capacity of the foundation structure 10 are ensured. The diameter of the insertion hole 119 of the guide tube portion 110, into which the piles 400 are inserted (described later), is approximately the same as the diameter of the piles 400. If the diameter of the piles 400 is 65 mm or less, the area occupied by the guide tube portion 110 on the guide plate 100 can be reduced. Therefore, the guide plate 100 can be made smaller. This reduces the area of the root excavation bottom EB for arranging the guide plate 100. As a result, the root excavation area can be reduced.

The length of the piles 400 is between 1.5 m and 4.5 m. In this embodiment, the length of the piles 400 is 2 m. The longer the piles 400, the greater the pull-out strength and bearing capacity of the foundation structure 10. On the other hand, the longer the piles 400, the greater the load of the driving work. In the case of a foundation structure 10 having eight piles 400, if the length of the piles 400 is 1.5 m or more, the pull-out strength and bearing capacity of the foundation structure 10 are ensured. If the length of the piles 400 is 4.5 m or less, the load of the driving work is reduced. The length of the piles 400 is set appropriately depending on the number of piles 400 in the foundation structure.

The pile 400 is driven into the ground with its upper end protruding from the excavation base EB. The portion 410 from the upper end of the pile 400 to the upper side of the guide tube portion 110 (hereinafter sometimes simply referred to as the "protruding portion") is enclosed in the hardened concrete 500. The protruding portion 410 is between 100 mm and 250 mm in length. This ensures the pull-out strength and bearing capacity of the foundation structure 10.

[Configuration of support 200]
The support column 200 has a support column base plate 210 at one end. The roof of the solar carport is provided at the other end of the support column 200 (not shown). The support column 200 and the support column base plate 210 are made of metal. In this embodiment, the support column 200 is welded to the center of the support column base plate 210. The support column 200 and the support column base plate 210 have a substantially square shape in a plan view. The size of the support column base plate 210 is appropriately set so that the support column base plate 210 does not come into contact with the guide tube portion 110 and the protruding portion 410 when fixed to the guide plate 100 by the fixing device 300.

The pillar base plate 210 has fixing holes 220 for fixing to the guide plate 100 using a fixing device 300. In this embodiment, four fixing holes 220 are provided in the pillar base plate 210. The fixing holes 220 are configured so that a pair of fixing holes 220 are positioned point-symmetrically with respect to the center of symmetry PS1 where the center line CL of the pillar 200 in the foundation structure 10 intersects with the pillar base plate 210. This allows the fixing device 300 to fix the pillar base plate 210 and the guide plate 100 in a balanced manner.

[Configuration of Fixture 300]
3 is a side view of the column base plate 210 and the guide plate 100 fixed by a fixing device 300. The fixing device 300 is composed of a bolt 301 and a nut 302. The column base plate 210 and the guide plate 100 are fixed by inserting the threaded portion of the bolt 301 into a fixing hole 220 of the column base plate 210 and a fixing hole 120 of the guide plate 100 (described later), and then tightening the bolt 301 and the nut 302. In this embodiment, an M16 hexagon bolt and hexagon nut are used as the fixing device 300.

[Configuration of hardened concrete 500]
The hardened concrete 500 is formed by hardening unhardened concrete 510 (described later) poured in the excavation area. The hardened concrete 500 includes the guide plate 100, a portion of the support 200 from the ground GD to the support base plate 210, the fixing device 300, and the protruding portion 410, all of which are located above the excavation bottom EB. This ensures the pull-out strength and bearing capacity of the foundation structure 10.

The hardened concrete 500 has a width HCW, depth HCD, and height HCH of 400 mm or more and 740 mm or less. If the width HCW, depth HCD, and height HCH are each 400 mm or more, pull-out strength is ensured. If the width HCW, depth HCD, and height HCH are each 740 mm or less, restrictions on parking lot use during construction and the disappearance of parking lot lines due to root cutting are reduced.

The width HCW and depth HCD are preferably 420 mm or more and 540 mm or less. If the width HCW and depth HCD are 420 mm or more, the pull-out strength and bearing capacity of the foundation structure 10 are improved. If the width HCW and depth HCD are 540 mm or less, the root excavation area is further reduced. Furthermore, in general commercial facilities such as convenience stores, the inner edge width IW of U-shaped demarcation lines DL is often set to approximately 540 mm. Therefore, if the width HCW is 540 mm or less, the loss of the demarcation line DL due to root excavation can be prevented. The height HCH is preferably 450 mm or more and 530 mm or less. If the height HCH is 450 mm or more, the pull-out strength and bearing capacity are improved. If the height HCH is 530 mm or less, the burden of root excavation work is reduced.

In the foundation structure 10, the height HCH of the hardened concrete 500 is below the ground surface GD. A layer of asphalt AP is laid from the top of the hardened concrete 500 to the ground surface GD. The thickness APT of the asphalt AP layer is, for example, 40 mm or more and 60 mm or less. Note that asphalt AP is not an essential component of the foundation structure 10. It is also possible to have the hardened concrete 500 extend up to the same level as the ground surface GD without laying a layer of asphalt AP.

[Configuration of guide plate 100]
FIG. 4 is a side view of the guide plate 100. FIG. 5 is a plan view of the guide plate 100. FIG. 6 is a bottom view of the guide plate 100. PS2 in FIGS. 5 and 6 indicates the center of symmetry where the center line CL of the support column 200 intersects with the guide plate 100 when the support column base plate 210 is fixed to the guide plate 100. The guide plate 100 is disposed in a position where each component is point-symmetrical with respect to the center of symmetry PS2. Therefore, the front view, back view, left side view, and right side view of the guide plate 100 are the same as the side view of the guide plate 100 in FIG. 4.

The guide plate 100 has a substantially square shape in a plan view. The guide plate 100 is sized so that it can be placed at the root cutting bottom EB. The base portion of the guide plate 100 in this embodiment is 420 mm wide and 420 mm deep. The guide plate 100 in this embodiment is a casting made of metal.

The guide plate 100 has fixing holes 120 for fixing the support base plate 210 with a fixing device 300. In this embodiment, four fixing holes 120 are provided in the guide plate 100. The fixing holes 120 are formed to correspond to the fixing holes 220 in the support base plate 210. The fixing holes 120 are arranged in positions that are point-symmetrical with respect to a pair of fixing holes 120, with the center of symmetry PS2 as the reference point. This allows the fixing device 300 to fix the support base plate 210 and the guide plate 100 in a balanced manner.

The guide plate 100 has peg holes 130 near its outer edge for temporarily securing the guide plate 100 to the root cutting bottom EB with pegs. This makes it easy to position the guide plate 100 at the root cutting bottom EB. In this embodiment, the guide plate 100 has four peg holes 130. The peg holes 130 are positioned so that pairs of peg holes 130 are point-symmetrical with respect to the center PS2. This prevents the temporarily secured guide plate 100 from shifting. The diameter of the peg holes 130 in this embodiment is 15 mm.

The guide plate 100 has five through holes 140. The through holes 140 include one cross hole 141 and four oval holes 142. The cross hole 141 is located in the center of the guide plate 100. The oval holes 142 are located on the outer edge of the guide plate 100, adjacent to the guide tube portion 110. The provision of the through holes 140 reduces the weight of the guide plate 100, making it easier to handle.

[Configuration of guide tube portion 110]
The guide plate 100 has a guide tube portion 110 into which the peg 400 is inserted. Fig. 7 is a side view showing the state in which the peg 400 is inserted into the guide tube portion 110. The two double-headed arrows shown in Fig. 7 indicate the height direction and width direction of the guide plate 100, respectively. Fig. 8 is a plan view showing the state in which the peg 400 is inserted into the guide tube portion 110. The two double-headed arrows shown in Fig. 8 indicate the width direction and depth direction of the guide plate 100, respectively.

The guide tube portion 110 has an insertion hole 119 into which the pile 400 is inserted. The guide tube portion 110 is configured to determine the driving direction HD when the pile 400 inserted into the insertion hole 119 is driven into the excavation bottom EB. The guide plate 100 of this embodiment has eight guide tube portions 111 to 118 as the guide tube portion 110. The guide tube portions 111 to 118 are configured so that the driving directions HD are HD1 to HD8, respectively.

The driving directions HD1 to HD8 are skewed relative to the center line CL to prevent contact between the piles 400 and the support columns 200. HD1 to HD8 are also skewed relative to the other driving directions HD to prevent contact between the piles 400. This reduces the burden of driving the piles 400 into the excavation bottom EB. All driving directions HD1 to HD8 are directed away from the center line CL. Therefore, all eight piles 400 are driven toward the area outside the outer edge of the guide plate 100. This improves the pull-out strength and bearing capacity of the foundation structure 10.

The angle θ of the driving direction HD relative to the excavation base EB is preferably between 50° and 70°. If the angle θ is between 50° and 70°, the pull-out strength and bearing capacity of the foundation structure 10 are improved. In this embodiment, the angle θ is 60°. It is also preferable that the angles θ of HD1 to HD8 relative to the excavation base EB are the same. This allows the pull-out strength and bearing capacity of the piles 400 driven into the excavation base EB to be balanced with respect to the center line CL. This further improves the pull-out strength and bearing capacity of the foundation structure 10.

The guide tube portion 110 is configured so that the pair of driving directions HD are point-symmetric with respect to the center of the object PS2. In this embodiment, the pair of driving directions HD consisting of driving directions HD1 and HD8 are point-symmetric with respect to the center of the object PS2. The pair of driving directions HD consisting of driving directions HD2 and HD7 are point-symmetric with respect to the center of the object PS2. The pair of driving directions HD consisting of driving directions HD3 and HD6 are point-symmetric with respect to the center of the object PS2. The pair of driving directions HD consisting of driving directions HD4 and HD5 are point-symmetric with respect to the center of the object PS2. This allows the pull-out strength and bearing capacity of the piles 400 driven into the excavation bottom EB to be balanced with respect to the center line CL. This further improves the pull-out strength and bearing capacity of the foundation structure 10.

The pair of guide tube portions 110 are positioned so that they are point-symmetrical with respect to the symmetric center PS2. In this embodiment, a pair of guide tube portions 110 consisting of guide tube portion 111 and guide tube portion 118 are positioned so that they are point-symmetrical with respect to the symmetric center PS2. A pair of guide tube portions 110 consisting of guide tube portion 112 and guide tube portion 117 are positioned so that they are point-symmetrical with respect to the symmetric center PS2. A pair of guide tube portions 110 consisting of guide tube portion 113 and guide tube portion 116 are positioned so that they are point-symmetrical with respect to the symmetric center PS2. A pair of guide tube portions 110 consisting of guide tube portion 114 and guide tube portion 115 are positioned so that they are point-symmetrical with respect to the symmetric center PS2. This allows the pile 400 to be driven into the excavation base EB in a balanced manner via the guide plate 100, with respect to the center line CL of the support 200. Therefore, the pull-out strength and bearing capacity of the piles 400 driven into the excavation bottom EB are exerted in a balanced manner with respect to the center line CL. As a result, the pull-out strength and bearing capacity of the foundation structure 10 are improved.

[Configuration of base structure 20]
The foundation structure 20 is applied to a building such as a solar carport and satisfies the structural regulations of the Building Standards Act. It is a foundation structure for a solar carport, having the same configuration as the foundation structure 10 described above, except that the fixing device 300 of the foundation structure 10 has been changed to a fixing device 310 having an adjustment portion 313. Therefore, detailed description of the configuration of the foundation structure 20 other than the fixing device 310 will be omitted. Figure 9 is a side view showing the foundation structure 20. The two double-headed arrows shown in Figure 9 indicate the height and width directions of the foundation structure 20. Figure 10 is a side view of the support base plate 210 and guide plate 100 fixed by the fixing device 310 having the adjustment portion 313.

[Configuration of Fixture 310]
Fixing device 310 is composed of bolt 311, nut 312, and adjustment portion 313. The under-neck length NL of bolt 311 is configured to be longer than the under-neck length of bolt 301. In this embodiment, the under-neck length NL of bolt 311 is 100 mm or more and 150 mm or less. Bolt 311 is inserted into fixing hole 120 and fixing hole 220 from the underside of guide plate 100. When the head seating surface of bolt 311 abuts against the lower surface of guide plate 100, the threaded portion of bolt 311 protruding above guide plate 100 becomes adjustment portion 313.

In the fixing device 310, three nuts 312a, 312b, and 312c are used for one bolt 311. The guide plate 100 is fixed to the fixing device 310 by tightening the head of the bolt 311 and nut 312c. The support base plate 210 is fixed to the fixing device 310 by tightening nuts 312a and 312b. The distance PGS from the support base plate 210 to the guide plate 100 can be adjusted by changing the position of nut 312b in the adjustment section 313.

In this embodiment, the support base plate 210 and guide plate 100 are fixed by four fasteners 310. The angle of the support base plate 210 relative to the guide plate 100 can be adjusted by adjusting the position of the nut 312b in the adjustment section 313 of each fastener 310. By adjusting the angle, the inclination of the center line CL of the support 200 relative to the ground GD can be adjusted. This reduces the load on the foundation structure 20 when vertically adjusting the support 200.

[Construction method of foundation structure 20]
Fig. 11 is a flow diagram of a construction method for the foundation structure 20. Figs. 12, 13, and 14 are diagrams showing the steps of the construction method of Fig. 11. Fig. 12 is a diagram showing the steps of the root cutting step S1, fixing step S2, placement step S3, and adjustment step S4. Fig. 13 is a diagram showing the steps of the insertion step S5, driving step S6, and non-insertion confirmation step S7. Fig. 14 is a diagram showing the steps of the casting step S8 and paving step S9.

The construction method for foundation structure 20 includes a root cutting process S1, a fixing process S2, a placement process S3, an adjustment process S4, an insertion process S5, a driving process S6, a non-insertion check process S7, a casting process S8, and a paving process S9. The construction method for foundation structure 10 is the same as that for foundation structure 20, except that it does not include adjustment process S4. Therefore, a description of the construction method for foundation structure 10 will be omitted.

[Root cutting process S1]
In the root excavation step S1, the ground GD is excavated to form a root excavation area having a width, depth, and depth of 400 mm to 740 mm. The width of the root excavation area is the same as the width HCW of the hardened concrete 500. The depth of the root excavation area is the same as the depth HCD of the hardened concrete 500. The depth of the root excavation area is the same as the combined length of the depth HCH of the hardened concrete 500 and the thickness APT of the asphalt AP layer. In this embodiment, the width, depth, and depth of the root excavation area are 500 mm, 500 mm, and 530 mm, respectively.

[Fixing process S2]
In the fixing step S2, the support base plate 210 and the guide plate 100 are fixed with four fixing devices 310. In the fixing step S2, the position of the nut 312b is adjusted so that the support base plate 210 and the guide plate 100 are approximately horizontal. In the construction method of the foundation structure 10, the support base plate 210 and the guide plate 100 are fixed by tightening the bolt 301 and the nut 302. The fixing step S2 can be performed in parallel with the root cutting step S1. The fixing step S2 can also be performed before or after the root cutting step S1. Figure 11 shows the flow when the fixing step S2 is performed in parallel with the root cutting step S1.

[Placement process S3]
In the placement step S3, the guide plate 100 with the support base plate 210 fixed thereto is placed at the root excavation bottom EB. In the placement step S3 of this embodiment, pegs 600 are driven into the peg holes 130 of the guide plate 100 placed at the root excavation bottom EB. Note that the center line CL of the support 200 in Figure 12 is slightly inclined with respect to the vertical line PL. Note that in this embodiment, the vertical line PL is perpendicular to the ground GB.

[Adjustment process S4]
In the adjustment process S4, the support 200 placed at the root cut bottom EB is aligned perpendicular to the ground GB. Specifically, the position of the nut 312b is adjusted so that the center line CL of the support 200 is perpendicular to the ground GB. In the root cut process S1, the root cut bottom EB is leveled, and in the fixing process S2, the support base plate 210 and the guide plate 100 are fixed approximately horizontally. Therefore, after the placement process S3, the support 200 is approximately perpendicular to the ground GB. However, at the construction site, due to the influence of the slope of the ground GB or the ground condition of the root cut bottom EB, it may be necessary to vertically align the support 200 after the placement process S3. As described above, the fixing device 310 of the foundation structure 20 has the adjustment unit 313. Therefore, in the foundation structure 20, the angle of the support 200 with respect to the ground GB after the placement process S3 can be adjusted in the adjustment process S4. This reduces the burden of the work of vertically aligning the support 200.

[Insertion step S5]
In the insertion step S5, the pile 400 is inserted into the insertion hole 119 of the guide tube portion 110 into which the pile 400 has not been driven. Also, in the insertion step S5, if there is a guide tube portion 110 into which the pile 400 has already been driven, the guide tube portion 110 and the guide tube portion 110 located point-symmetrically with respect to the center of symmetry PS2 are identified. If the identified guide tube portion 110 does not have the pile 400 driven into it, the pile 400 is inserted into the insertion hole 119 of the identified guide tube portion 110. As a result, in the driving step S6, the pile 400 is driven into the root excavation bottom EB via the guide plate 100 in a balanced manner. Therefore, displacement of the guide plate 100 positioned at the root excavation bottom EB is suppressed in the driving step S6.

[Driving step S6]
In the driving step S6, the pile 400 inserted into the insertion hole 119 in the insertion step S5 is driven into the excavation bottom EB. An electric tool such as a handheld electric hammer can be used to drive the pile 400. In the driving step S6, the pile 400 is driven so that the protruding portion 410 is 400 mm or less.

[Non-insertion confirmation step S7]
In the non-insertion confirmation step S7, the presence or absence of an insertion hole 119 into which a pile 400 has not been inserted is confirmed. If an insertion hole 119 into which a pile 400 has not been inserted is confirmed, the process returns to the insertion step S5. If there is no insertion hole 119 into which a pile 400 has not been inserted, the process moves to the driving step S8. The guide plate 100 of this embodiment has eight insertion holes 119. Therefore, the insertion step S5 and the driving step S6 are performed eight times.

[Pouring process S8]
In the pouring step S8, unhardened concrete 510 is poured into the excavation area. By the pouring step S8, the guide plate 100, a portion of the support 200, the fixing device 300, and the protruding portion 410 located above the excavation bottom EB are buried in the unhardened concrete 510. As a result, after the unhardened concrete 510 hardens, the guide plate 100, a portion of the support 200, the fixing device 300, and the protruding portion 410 located above the excavation bottom EB are encompassed by the hardened concrete 500. In this embodiment, the unhardened concrete is poured until the surface of the unhardened concrete is at a depth of 40 mm to 60 mm below the ground surface GD.

[Paving process S9]
In the paving step S9, after the unhardened concrete 510 poured in the pouring step S8 becomes hardened concrete 500, the top side of the hardened concrete 500 is paved with asphalt AP. Also, in the paving step S9, demarcation lines DL are applied to the asphalt AP as needed. Note that the paving step S9 is not an essential step. The paving step S9 can be omitted by pouring the unhardened concrete up to the ground surface GD in the pouring step S8.

[Modification]
The foundation structure 10 and the foundation structure 20 can also be used as foundation structures for solar carports and structures other than carports, such as solar panel stands, streetlights, road signs, traffic signals, billboards, trailer homes, container homes, modular homes, stairs, or walkways.

[others]
It should be noted that at least some of the above-described embodiments and various modified examples may be combined with each other in any desired manner. Furthermore, the embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, and it is intended to include all modifications within the meaning and scope of the claims.

10, 20 Foundation structure 100 Guide plate 110 Guide tube portion 119 Insertion hole 120, 220 Fixing hole 130 Peg hole 140 Through hole 200 Support 210 Support base plate 300, 310 Fixing device 301, 311 Bolt 302, 312 Nut 313 Adjustment portion 400 Pile 410 Protruding portion 500 Hardened concrete 510 Unhardened concrete 600 Peg CL Center line ED Bottom of excavation HD Driving direction HCW Width of hardened concrete HCD Depth of hardened concrete HCH Height of hardened concrete

Claims (16)

A plurality of piles that are driven in with their upper ends protruding from the bottom of the excavation;
a support base plate provided at an end of the support;
A guide plate having a guide tube portion into which the pile is inserted and arranged at the root excavation bottom;
a fixture for fixing the support base plate and the guide plate;
and hardened concrete above the root cut bottom,
The guide tube portion is configured so that the driving direction of the pile driven into the root excavation bottom is in a twisted positional relationship with the center line of the support fixed to the guide plate via the support base plate by the fixing device, and is moved away.
Foundation structure for carport. The guide plate is
an even number of the guide tube portions;
The point where the center line intersects with the guide plate is the center of symmetry, and the pair of guide tube portions are configured to be positioned symmetrically with respect to the point.
The carport foundation structure according to claim 1. The carport foundation structure described in claim 2, wherein the guide tube portion is configured so that the driving direction is at an angle of 50° to 70° relative to the root cut bottom. The carport foundation structure described in claim 3, wherein the guide tube portion is configured so that the driving direction of all the piles is at the same angle relative to the excavation base. The carport foundation structure described in claim 4, wherein the guide tube portions are configured so that the driving directions of the piles inserted into each of the pair of guide tube portions are point-symmetric with respect to the center of the symmetry. The carport foundation structure of claim 1, comprising eight of the piles. The carport foundation structure described in claim 6, wherein the length of the piles is 1.5 m or more and 4.5 m or less. The carport foundation structure described in claim 1, wherein the fixing device has an adjustment portion for adjusting the angle of the support pole relative to the ground on which it is installed. The carport foundation structure described in claim 1, wherein the hardened concrete has a width, depth, and height of 400 mm or more and 740 mm or less. The hardened concrete is
Width is between 420mm and 540mm,
The carport foundation structure according to claim 9, wherein the depth is 420 mm or more and 540 mm or less and the height is 450 mm or more and 530 mm or less. A solar carport equipped with the carport foundation structure described in any one of claims 1 to 10. A construction method for the carport foundation structure according to claim 1,
A root cutting process of excavating a hole having a width, a length, and a depth of 400 mm or more and 740 mm or less;
a fixing step of fixing the support base plate and the guide plate with the fixing tool;
An arrangement step of arranging the guide plate to which the support base plate is fixed at the root cutting bottom;
an insertion step of inserting the pile into the guide tube portion;
A driving step of driving the pile inserted into the guide tube portion into the root cutting bottom;
A pouring step of pouring unhardened concrete into the hole;
Construction methods including. A construction method for the carport foundation structure according to claim 8,
A root cutting process of excavating a hole having a width, a length, and a depth of 400 mm or more and 740 mm or less;
a fixing step of fixing the support base plate and the guide plate with the fixing tool;
An arrangement step of arranging the guide plate to which the support base plate is fixed at the root cutting bottom;
an adjustment step of adjusting an angle of the support pole with respect to the ground by the adjustment portion of the fixing tool;
an insertion step of inserting the pile into the guide tube portion;
A driving step of driving the pile inserted into the guide tube portion into the root cutting bottom;
A pouring step of pouring unhardened concrete into the hole;
Construction methods including. a fixing hole provided at the end of the support pole for fixing the support pole base plate with a fixing tool;
A guide tube portion into which a plurality of piles are inserted so that their upper ends protrude from the bottom of the excavation.
A guide plate having a peg hole for driving a peg into the root cutting bottom,
The guide tube portion is configured so that the driving direction of the pile driven into the root excavation bottom is in a twisted positional relationship with the center line of the support fixed to the guide plate via the support base plate by the fixing device, and is away from the center line.
A guide plate for the pin foundation construction method used in the foundation structure of a carport where unhardened concrete is poured. A guide plate for the pin foundation construction method as described in claim 14, wherein the guide tube portions are configured so that the driving directions are in a twisted positional relationship. The guide plate for the pin foundation construction method according to claim 14 or 15, wherein the carport foundation structure is a solar carport foundation structure.