JP5814205B2 - Structural foundation of solar cell module mounts and buildings - Google Patents

Description

  The present invention relates to a basic structure for a solar cell module mount, and more specifically, it has sufficient load resistance and can be designed flexibly so as to be compatible with various solar cell module designs, thereby reducing the construction period and cost. The present invention relates to a possible foundation structure for a solar cell module mount.

  In recent years, photovoltaic power generation is spreading as safe and clean energy, and development of a ground-installed photovoltaic power generation system in which a plurality of solar cell modules are arranged has been promoted. In a photovoltaic power generation system, a solar cell module is supported at a predetermined inclination angle by a support including a frame and a truss-shaped base frame and a foundation thereof. It is required to design in consideration of the wind pressure load acting on (JIS C 8955). However, in order to have a design that can withstand such wind pressure loads, the foundation concrete needs to have a corresponding weight. Particularly in areas where wind pressure is high, for example, as shown in FIG. 10, a very large foundation design is required, such as placing foundation concrete on one side with an area larger than the horizontal projection area of the solar cell module. The problem that a cost and construction period were required had arisen.

  For such problems, a technique for reducing lift generated in the solar cell module by providing a ventilation slit between the gantry and the solar cell module (Patent Document 1), an inclined surface in the foundation concrete block, and a steel material A technique (Patent Document 2) or the like for directly installing a solar cell module on this is proposed. However, due to these problems, if sufficient load resistance is to be provided, there are problems such as a large work period and cost, and difficulty in dealing with various solar cell module designs.

  Therefore, there is a need for a solar cell panel base structure that has sufficient load resistance and can be designed flexibly so as to be compatible with various solar cell module designs, and that can reduce the work period and cost.

JP 2011-911166 A JP 2007-35849 A

  The present invention provides a foundation structure for a solar cell panel gantry that has sufficient load resistance, can be designed flexibly so as to be compatible with various solar cell module designs, and can reduce the work period and cost. Is an issue.

  The foundation structure for a solar cell module mount according to the present invention that has solved the above problems is a screw anchor support panel in which a foundation frame is installed on a screw anchor disposed in a direction perpendicular to the ground, and is disposed inside the foundation frame. The screw anchors are fixed to each other, concrete is cast on the foundation frame, and anchor bolts protrude from the upper surface of the foundation frame.

  The anchor bolt is fixed to the screw anchor support board.

  The anchor bolt is fixed to an anchor bolt support board.

  Furthermore, the screw anchor support plate and the anchor bolt support plate integrally form a support frame.

  The basic structure for a solar cell module mount according to the present invention has sufficient pulling load resistance capable of stably supporting the solar cell module against the wind pressure load acting on the solar cell module. In addition, since relatively small single foundations are arbitrarily arranged, interference between the foundations of each other can be avoided, and a flexible foundation design adapted to various solar cell module designs is possible. Furthermore, it can be applied to soil, concrete pavement, asphalt pavement, etc. without being restricted by the ground, and the construction period can be shortened and the cost can be reduced as compared with the conventional foundation structure.

It is sectional drawing which shows the basic structure for solar cell module mounts concerning the 1st Embodiment of this invention. It is an expanded sectional view near the ground surface of the foundation structure for solar cell module mount of the present invention. It is an expanded sectional view of the ground surface vicinity of the foundation structure for solar cell module mounts according to the second embodiment of the present invention. It is an expanded sectional view of the ground surface vicinity of the foundation structure for solar cell module mounts according to the third embodiment of the present invention. It is an expanded sectional view of the ground surface vicinity of the basic structure for solar cell module mounts according to the fourth embodiment of the present invention. It is a perspective view which shows the solar cell array constructed | assembled using the basic structure for solar cell module mounts of this invention. It is the same side view. It is the same top view. It is a perspective view which shows the state which juxtaposed the solar cell array constructed | assembled using the basic structure for solar cell module mounts of this invention. It is a perspective view which shows the conventional basic structure for solar cell module mounts.

  Hereinafter, the basic structure for a solar cell module mount according to the present invention will be specifically described with reference to the drawings. Note that the present invention is not limited to these embodiments.

  FIG. 1 is a cross-sectional view showing a solar cell module mount base structure 1 (hereinafter sometimes simply referred to as a “base structure”) according to a first embodiment of the present invention, and FIG. It is an expanded sectional view. The screw anchor 2 has a helical screw portion 2b at the lower end of the support bar 2a, and is rotated and penetrates into the ground to be buried vertically. On the other hand, the upper end of the support bar 2a protrudes to the ground surface and is provided with a thread groove 2c. The screw anchor 2 has the length and diameter of the support bar 2a and the shape and size of the excavating blade of the screw portion 2b so as to obtain a pulling load resistance that can withstand wind pressure load according to the solar cell module design and installation conditions. For example, a screw anchor having a support rod diameter of about 13 to 19 mm, a length of about 2000 to 3200 mm, and a drilling blade diameter of about 270 to 350 mm is preferably used. In this embodiment, a screw anchor having a support rod diameter of 13 mm, a length of 2000 mm, and a drilling blade diameter of 270 mm is used.

  The foundation frame 3 is disposed so as to surround the upper end of the support rod 2a of the screw anchor 2 protruding to the ground surface. The foundation frame 3 used in the present embodiment is a rectangular parallelepiped-shaped concrete rod having upper and lower surfaces opened at a length of 370 mm, a width of 370 mm, a height of 450 mm, and a wall thickness of 50 mm. The foundation frame 3 may be placed on the ground surface, but may be buried to a certain depth, and further, an RC crushed stone 4 or the like may be laid down thereunder and installed thereon. In the present embodiment, a hole having a depth of about 100 mm is excavated, RC crushed stone 4 is laid with a layer thickness of about 100 mm, and the foundation frame 3 is placed thereon.

  Inside the foundation frame 3, a screw anchor support board 5a for fixing the screw anchor 2 is arranged. In this embodiment, the screw anchor support board 5a and the anchor bolt support board 5b are united to form the support frame 5. The support frame 5 is formed of a metal plate such as a steel plate, and has a rectangular parallelepiped shape in which a screw anchor support plate 5a forms a lower surface, an anchor bolt support plate 5b forms an upper surface, and a pair of opposed side surfaces open. The size of the support frame 5 in this embodiment is 250 mm in length, 250 mm in width, and 170 mm in height. An insertion hole (not shown) is provided at the center of the screw anchor support board 5a, and the upper end of the support rod 2a of the screw anchor 2 is inserted, and two nuts 6 are sandwiched between the screw anchor support board 5a. The screw anchor 2 and the support frame 5 are fixed by screwing. On the other hand, the anchor bolt support board 5b is also provided with an insertion hole (not shown). The anchor bolt 7 is inserted into the insertion hole, and the nut 8 is screwed to fix the anchor bolt 7 to the support frame 5. Has been. The number and position of the anchor bolts 7 are appropriately set according to the design of the solar cell module. In this embodiment, two M12 anchor bolts are used. Reinforcing bars may be provided on the support frame 5 as appropriate for reinforcement. In this state, by placing concrete in the foundation frame 3, the foundation structure for the solar cell module mount of the present invention is formed. The upper end of the anchor bolt 7 protrudes from the surface of the foundation frame 3 that has been placed, and a pedestal that supports the solar cell module is bridged and fixed through this portion.

  The fixing structure of the screw anchor 2 and the anchor bolt 7 can take various forms. FIG. 3 shows a basic structure according to the second embodiment of the present invention. In this embodiment, only the screw anchor 2 is fixed to the support plate 5a, and after casting the concrete, the anchor bolt 7 is fixed to the concrete upper surface by a known post-construction anchor method. FIG. 4 shows a basic structure according to the third embodiment. In this embodiment, the screw anchor 2 and the anchor bolt 7 are both fixed to a single support board 5a. FIG. 5 is a view showing a fourth embodiment. In this embodiment, the screw anchor 2 is fixed to the support plate 5a, and the anchor bolt 7 is fixed to the support plate 5b. Among these, since higher load resistance can be obtained, the first or third embodiment in which the screw anchor 2 and the anchor bolt 7 are fixed to the same or integrated support plate is preferable. The first embodiment is particularly suitable because of the high degree of freedom in anchor bolt layout. In these embodiments, one screw anchor 2 is arranged in one foundation frame 3, but a plurality of screw anchors 2 may be arranged, whereby the load resistance can be further improved. In consideration of installation space, necessary load resistance, etc., for example, the foundation structure 1 in which one screw anchor 2 is arranged in one foundation frame 3 and two screw anchors 2 in one foundation frame 3. It is also possible to construct a solar cell array by combining with a relatively large foundation structure 1 in which are arranged.

  Next, the construction procedure of the foundation structure for the solar cell module mount according to the present invention will be described according to the first embodiment.

  First, the rod for screw anchor construction is attached to the building pillar, and the screw anchor is inserted into the rod. A screw anchor is arranged at a predetermined position, and the hydraulic auger is rotated to enter a predetermined embedding depth. Next, a hole for disposing the foundation frame is excavated to a predetermined depth around the upper end of the screw anchor support rod protruding from the ground surface. If necessary, RC crushed stone is laid down to a predetermined height in this hole, and a foundation frame is installed on it. In this foundation frame, the upper end of the screw anchor support rod is inserted into an insertion hole provided in the lower surface of the support frame, and is fixed by screwing with a nut. In addition, an anchor bolt is inserted into an insertion hole provided on the upper surface of the support frame, and is similarly screwed and fixed with a nut. Thereafter, the concrete is poured into the foundation frame and cured for a certain period of time, whereby the foundation structure for the solar cell module frame of the present invention is formed.

  Next, the frame formed on the foundation structure for the solar cell module frame of the present invention and the solar cell module supported by these will be described.

  FIG. 6 is a perspective view showing a solar cell array constructed using the foundation structure for a solar cell module stand of the present invention, FIG. 7 is a side view thereof, FIG. 8 is a top view thereof, and FIG. It is a perspective view which shows the state which arranged the solar cell array in parallel. In the solar cell array 10, a gantry 12 that supports the solar cell module 11 is formed on the foundation structure 1. The gantry 12 is formed by combining a plurality of bar-shaped structural materials made of, for example, a shape steel material and joining them in a frame shape or a truss shape. In the present embodiment, the solar cell module mount base structures 1 of the present invention are installed at four corners at positions where the widthwise interval is 2070 mm and the longitudinal interval is 2000 mm. The end portions of the base rails 12a are attached and supported via anchor bolts 7 protruding from the upper surfaces of the pair of foundation structures 1, and the pair of base rails 12a are arranged in parallel. Two arms 12b are attached to one base rail 12a via a bracket or the like so as to form a predetermined inclination angle together with the other base rail 12a. Along the inclined direction, the solar cell module 11 is supported by laying diagonal members 12c on the upper ends of the one base rail 12a and the two arms 12b at predetermined intervals according to the required strength. A frame is constructed. In the gantry 12, the type, number, angle, bonding form, and the like of the structural material can be appropriately changed according to the design of the solar cell module. Further, in order to enhance load resistance, a shape steel material may be installed and fixed between the adjacent foundation structures 1.

  A solar cell module 11 is attached to the gantry 12. The solar cell module 11 is formed in a flat plate shape by placing one or a plurality of solar cell modules in an aluminum frame or the like. In the present embodiment, six solar cell modules 11 are held in an inclined state in a framework of three rows and two columns in the vertical and horizontal directions. The solar cell module 11 in the present embodiment has a width of 1319 mm, a height of 866 mm, a thickness of 35 mm, and an inclination angle of about 20 degrees with respect to the horizontal plane.

  The solar cell module foundation structure of the present invention formed in this way is an arrangement in which relatively small single foundations are arbitrarily arranged, so that interference around the mutual foundations can be avoided, and various solar cell module designs can be achieved. The combined flexible foundation design is possible, and the construction period can be shortened and the cost can be reduced as compared with the conventional foundation structure.

  And although it is a small thing compared with the conventional basic structure, it has the withstand load resistance which can support a solar cell module stably against the wind pressure load which acts on a solar cell module. For reference, an example of load calculation in the solar cell array of the above embodiment is shown below. Under the following design conditions, the fixed load G is 497.2 kg, the wind pressure load W under negative pressure is 1998.24 kg, and during the short-term storm Whereas the maximum load per foundation is 207.0 kg, in the above embodiment, the pulling-out load per foundation is 1066.0 kg, it is possible to sufficiently counter this maximum load. .

(Design condition)
Standard wind speed: 36 m / s
Area: General area Solar array height: 0m above ground
Surface roughness classification: III
Array installation classification: Ground installation type Array inclination angle: θ = 20 °
Solar cell module dimensions: 1319 mm x 866 mm x 35 mm
Solar cell module mass: 13kg
Number of solar cell modules: 24 Base material / partial shape: High corrosion-resistant hot-dip galvanized steel sheet ZAM / Lightweight grooved steel Base rail material / weight: General structural rolled steel SS400 / 9.36kg / m
Anchor bolt nut material / shape: stainless steel SUS304 / M12
Tightening reference torque:

  The foundation structure of the present invention has sufficient pull-out load resistance to stably support the solar cell module against wind pressure load acting on the solar cell module, and a relatively small single foundation is arbitrarily disposed. Therefore, interference around the foundations of each other can be avoided, and a flexible foundation design adapted to various solar cell module designs is possible. Therefore, it is useful as a foundation structure for a solar cell module mount.

DESCRIPTION OF SYMBOLS 1 ... Foundation structure for solar cell module mounts 2 ... Screw anchor 2a ... Support rod 2b ... Screw part 2c ... Screw groove 3 ... Foundation frame 4 ... RC crushed stone 5 ... Support frame 5a ... Screw anchor support board 5b ... Anchor bolt support board 6 8 ... Nut 7 ... Anchor bolt 10 ... Solar cell array 11 ... Solar cell module 12 ... Stand 12a ... Base rail 12b ... Arm 12c ... Slanting material
that's all

Claims (2)

A foundation frame is installed on a screw anchor arranged in a vertical direction on the ground, the screw anchor is fixed to a screw anchor support board arranged inside the foundation frame, and concrete is placed on the foundation frame. A base structure for a solar cell module frame provided with an anchor bolt protruding from the upper surface of the foundation frame , wherein the anchor bolt is fixed to an anchor bolt support board, and the screw anchor support board and the A foundation structure for a solar cell module base in which the anchor bolt support panel forms a support frame integrally . The foundation structure for a solar cell module frame according to claim 1, wherein one screw anchor is disposed in the foundation frame .

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