Construction method of facility cradle

Abstract

To provide a construction method of a facility cradle and a foundation structure of a facility cradle that lead to a reduction in man hour at a high place such as a rooftop.SOLUTION: A construction method of a facility cradle erected on a mechanical foundation includes the steps of: inserting legs 21 of the facility cradle into a cylindrical foundation body 11 made of precast concrete, and attaching the foundation body 11 to the legs 21 with bolts 3 made to pass through opposing side walls of the foundation body 11 and the legs 21; lifting the foundation body 11 and the facility cradle as a unit and suspending them to an installation location of the legs 21; fixing the legs 21 to the installation location; and filling the inside of the foundation body 11 with a filling material.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a construction method for an equipment rack and a foundation structure for an equipment rack. [Background technology]

[0002] When installing heavy equipment such as air conditioners, cubicles, control panels, servers, and distribution boards on the roof of a building, these equipment are often placed on top of an equipment stand with steel-framed legs and horizontal beams.

[0003] To install an equipment rack on a roof, a concrete slab is poured on the roof, a concrete machine foundation is erected on the slab, and the equipment rack is fixed to the machine foundation. A waterproof layer made of asphalt or the like is placed continuously on the top surface of the slab and the sides of the machine foundation.

[0004] Machine foundations are constructed by erecting a form on the roof and then pouring concrete into the form, but machine foundations are sometimes precast to reduce the amount of work required on high ground such as rooftops and to shorten the construction period. Patent Document 1 describes an equipment foundation structure to be installed on a slab on a rooftop or the like, in which fixing rebars protruding upward from the slab are inserted into through holes in the main body of the precast concrete foundation and filled with filler. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2022-96117 Summary of the Invention [Problem to be solved by the invention]

[0006] However, even if the machine foundation was precast, the equipment frame would still need to be lifted separately from the machine foundation using a crane or other device and secured to the machine foundation on the roof, leaving room for further labor cost reduction.

[0007] In addition, equipment racks often have multiple legs, and after the precast machine foundation has been fixed to the installation location on the roof, it can be difficult to adjust the position between the equipment rack and the machine foundation when fixing the multiple legs of the equipment rack to separate machine foundations.

[0008] In addition, when the site was small and the building was constructed using a build-and-run method while installing precast machine foundations on the roof, the already constructed building sometimes got in the way, making it difficult to position a crane or other equipment in a suitable location to install the equipment rack.

[0009] The present invention has been made in consideration of the above problems, and aims to provide a construction method for an equipment rack and a foundation structure for an equipment rack that lead to a reduction in labor required at high places such as rooftops. [Means for solving the problem]

[0010] The first invention for solving the above-mentioned problems is a construction method for an equipment rack to be erected on a machine foundation, comprising the steps of: inserting the legs of the equipment rack inside the foundation body of a cylindrical machine foundation made of precast concrete, and attaching the foundation body to the legs with penetrating materials passed through opposing side wall portions of the foundation body and the legs; lifting the foundation body and the equipment rack as a unit and suspending them at installation locations of the legs; and fixing the legs to the installation locations, wherein the inside of the foundation body is filled with filling material.

[0011] In the first invention, the foundation body of the machine foundation is attached in advance to the legs of the equipment frame using a penetrating material in a work yard on the ground or the like, and the foundation body and the equipment frame are lifted together with a crane or the like and suspended above the installation location of the legs, and the legs are fixed to the installation location. This allows the foundation body and the equipment frame to be constructed at one time, reducing the amount of work required at high altitudes such as rooftops and completing construction in a short period of time.

[0012] In addition, by attaching the foundation body to the legs of the equipment stand in advance, it becomes easy to adjust the positions of the equipment stand and the machine foundation even when the equipment stand has multiple legs, and by lifting and constructing the foundation body and the equipment stand together, the problems described above do not occur when constructing a building using the build-and-run method.

[0013] It is desirable that the installation location of the leg is the upper surface of the beam, the lower end of the leg protrudes downward from the foundation body, and the leg is fixed to the installation location by joining the lower end of the leg to a mounting plate provided on the upper surface of the beam, and after the leg is fixed, a slab of concrete is poured on top of the beam. In this case, the legs can be easily fixed by joining the mounting plate on the upper surface of the beam supporting the slab to the lower end portions of the legs protruding from the foundation body.

[0014] The legs may be formed of H-beams, for example, and the feedthrough may pass through a web of the legs, or through both flanges of the legs. In the former case, it is possible to prevent damage to the flanges that mainly bear the stress in the H-shaped steel, while in the latter case, it is possible to prevent the legs from tilting or shifting in position within the foundation body, making it easier to maintain the verticality and horizontal position of the legs until the filling material is poured in.

[0015] The second invention is a foundation structure for an equipment rack erected on a mechanical foundation, characterized in that the legs of the equipment rack are inserted into the inside of the foundation body of a cylindrical mechanical foundation made of precast concrete, penetrating materials are passed through the opposing side wall portions of the foundation body and the legs, the legs are fixed to the installation locations of the legs, and a filling material is filled inside the foundation body. Effect of the Invention

[0016] According to the present invention, it is possible to provide a construction method for an equipment rack and a foundation structure for an equipment rack that lead to a reduction in labor required for construction at high places such as rooftops. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a diagram showing a foundation structure 10 of the equipment stand 2. [Diagram 2] A diagram showing the base body 11. [Diagram 3] FIG. [Figure 4] FIG. 2 is a horizontal cross section taken along line CC in FIG. [Diagram 5] A diagram showing the state in which the foundation body 11 is attached to the legs 21. [Figure 6] 2A to 2C are diagrams for explaining a construction method of the foundation structure 10. [Figure 7] An example in which a hole 213 is provided in a flange 212 of a leg portion 21. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0019] (1. Foundation structure 10 of equipment stand 2) Fig. 1(a) is a diagram showing a foundation structure 10 of an equipment rack 2 constructed by a construction method according to an embodiment of the present invention. Fig. 1(b) is a diagram showing a vertical cross section taken along line AA in Fig. 1(a). Fig. 1(a) also shows a vertical cross section taken along line BB in Fig. 1(b).

[0020] The foundation structure 10 is formed by fixing the legs 21 of an equipment stand 2 to be installed on the roof of a building to a machine foundation 1 provided on a slab 6 on the roof, and erecting the equipment stand 2 on the machine foundation 1. The slab 6 is formed by pouring concrete, and a waterproof layer (not shown) made of asphalt or the like is provided continuously on the upper surface of the slab 6 and the side surface of the machine foundation 1.

[0021] The machine foundation 1 is the foundation for an equipment frame 2, and has a cylindrical foundation body 11 made of precast concrete.

[0022] 2 is a diagram showing the foundation body 11. The foundation body 11 is a tubular member having a square-shaped flat surface, and a flange portion 111 is provided at the upper end thereof, protruding outward from the foundation body 11. The flange portion 111 functions as a cap portion for the waterproof layer.

[0023] Below the flange portion 111, a plurality of holes 112 are provided in the side wall portion of the foundation body 11. In this embodiment, a total of four holes 112, two vertically and two horizontally, are arranged at positions corresponding to the vertices of a rectangle. As shown in FIG. 1(b), these holes 112 are arranged in each of a pair of opposing side walls, and the positions of the holes 112 in both side walls correspond to each other.

[0024] 1(a) and (b), the lower part of the leg 21 of the equipment stand 2 is inserted into the inside of the foundation body 11, and a filler 7 such as mortar is filled in. A plate-shaped water stop plate 214 protruding outward from the leg 21 is provided on the part of the leg 21 above the foundation body 11.

[0025] 3(a) is a diagram showing the entire equipment stand 2. The equipment stand 2 has horizontal beams 22 in addition to legs 21, and the legs 21 and horizontal beams 22 are made of steel. The horizontal beams 22 are arranged in a lattice pattern, and the legs 21 are provided so as to protrude downward from the horizontal beams 22 at positions corresponding to the lattice points.

[0026] The equipment rack 2 is divided into multiple sections on a plane, and is formed by joining these sections on the roof. Fig. 3(b) is a diagram showing an example of such a divided section, which includes multiple legs 21 (two in this example).

[0027] Fig. 4 shows a horizontal cross section taken along line CC in Fig. 1(b). In this embodiment, the leg 21 is formed of an H-shaped steel and has a web 211 and a flange 212. The flanges 212 are provided at both ends of the web 211 in the width direction. The width direction of the web 211 corresponds to the up-down direction in Fig. 4. The web 211 has a plurality of holes 213 provided at positions corresponding to the holes 112 in the side wall of the foundation body 11.

[0028] In the foundation structure 10, a bolt 3, which is a penetrating member, is passed through holes 112 in a pair of opposing side walls of the foundation body 11 and through holes 213 in the webs 211 of the legs 21. Nuts 31 are fastened to both ends of the bolt 3. The hole 112 expands in diameter on the surface of the side wall of the foundation body 11, and the nut 31 is housed in this expanded portion 1121. The expanded portion 1121 is filled with a hole filling material 113 such as mortar, and the surface of the side wall of the foundation body 11 is smoothed. This makes it possible to easily provide the above-mentioned waterproof layer on the side wall of the foundation body 11.

[0029] 1(a) and (b), the slab 6 is supported by the beam 4 below it. The beam 4 is a steel beam, and a mounting plate 41 and a stud 43 are fixed to the top surface of the beam 4. The mounting plate 41 and the stud 43 are provided so as to protrude upward from the top surface of the beam 4.

[0030] In this embodiment, the upper surface of the beam 4 is the installation location for the leg 21 of the equipment rack 2, and the mounting plate 41 is used to fix the leg 21. The lower end of the leg 21 protrudes downward from the foundation body 11, and the lower end of the web 211 of the leg 21 and the mounting plate 41 are fastened and joined together using fasteners 42 consisting of bolts and nuts. The web 211 and the mounting plate 41 are provided with holes (not shown) for passing the bolts through. The studs 43 improve the unity between the beam 4 and the concrete of the slab 6.

[0031] (2. Construction method of equipment stand 2) When constructing the equipment rack 2, first, the foundation body 11 illustrated in Fig. 2 and the divided parts of the equipment rack 2 illustrated in Fig. 3(b) are brought into the site. Then, in a work yard on the ground, the legs 21 of the divided parts of the equipment rack 2 are inserted inside the foundation body 11, and as shown in Fig. 5(a), the bolts 3 are passed through the holes 112 in the opposing side walls of the foundation body 11 and the holes 213 in the legs 21, and nuts 31 are fastened to both ends.

[0032] As a result, the foundation body 11 is attached to the legs 21 using the bolts 3. Fig. 5(b) is a perspective view showing the state in which the foundation body 11 is attached to the legs 21. Fig. 5(a) shows a horizontal cross section corresponding to Fig. 4.

[0033] Next, the divided parts of the equipment stand 2 and the foundation body 11 are lifted together using a lifting device such as a crane and hung down onto the upper surface of the beam 4 as shown by the arrow in Fig. 6(a). After that, as shown in Fig. 6(b), the mounting plate 41 on the upper surface of the beam 4 and the lower end of the web 211 of the leg 21 are fastened together using fasteners 42. This fixes the leg 21 to the upper surface of the beam 4.

[0034] 6(a) and (b) are cross sections corresponding to Fig. 1(b), and the same is true for Fig. 6(c) described below. Furthermore, by post-installing some of the studs 43 on the top surface of the beam 4, as illustrated by dashed lines in Fig. 6(a) and (b), it is possible to easily secure working space above the beam 4 when inserting a tool such as a wrench between the foundation body 11 and the beam 4 to perform the above-mentioned fastening work.

[0035] After the legs 21 are fixed, some of the studs 43 described above are installed, and the concrete for the slab 6 is poured as shown in Fig. 6(c). The concrete is poured up to the height of the lower end of the foundation body 11, and the mounting plate 41 and the lower ends of the legs 21 are embedded in the concrete of the slab 6.

[0036] Furthermore, by inserting the wedge material 5 between the flange portion 111 of the foundation body 11 and the water stop plate 214 of the leg portion 21, the leg portion 21 is prevented from falling over or shifting position within the foundation body 11. After temporarily placing it in this state, the filler material 7 is filled into the inside of the foundation body 11 from the gap between the flange portion 111 and the water stop plate 214. The filler material 7 can be filled from the places where the wedge material 5 has not been inserted, or can be filled after removing the wedge material 5.

[0037] Furthermore, necessary processes such as filling the enlarged diameter portion 1121 of the hole 112 (see FIG. 5(a) and the like) with a hole filling material 113 are carried out, and thereby the base structure 10 shown in FIG. 1 and the like is constructed.

[0038] Using the above procedure, multiple divided parts of the equipment stand 2 are installed on the rooftop together with the machine foundation 1, and the horizontal beams 22 of these multiple divided parts are joined together to form the equipment stand 2.

[0039] As described above, in this embodiment, the foundation body 11 of the machine foundation 1 is attached in advance to the legs 21 of the equipment frame 2 using the bolts 3 in a work yard on the ground or the like, and the foundation body 11 and the divided parts of the equipment frame 2 are lifted together with a crane or the like and suspended onto the upper surface of the beams 4, and the legs 21 are fixed to the upper surface of the beams 4, thereby allowing the foundation body 11 and the divided parts of the equipment frame 2 to be constructed at once, reducing the amount of work required at high altitudes such as on rooftops and completing construction in a short period of time.

[0040] In addition, by attaching the foundation body 11 to the legs 21 of the equipment stand 2 in advance, it becomes easy to adjust the positions of the equipment stand 2 and the machine foundation 1 even when the equipment stand 2 has multiple legs 21, and by lifting and constructing the foundation body 11 and the equipment stand 2 together, the problems described above do not occur when constructing a building using the build-and-run method.

[0041] In addition, in this embodiment, in the process shown in Figure 6(b) above, the mounting plate 41 on the upper surface of the beam 4 supporting the slab 6 is joined to the lower end of the leg 21 protruding from the foundation body 11, making it possible to easily fix the leg 21.

[0042] In this embodiment, an H-shaped steel is used for the leg 21, and by providing the web 211 with a hole 213 for passing the bolt 3, damage to the flange 212, which mainly bears the stress in the H-shaped steel, can be prevented.

[0043] However, the present invention is not limited to the above embodiment. For example, in the above embodiment, the bolt 3 is passed through the hole 213 of the web 211 of the leg 21, but as shown in Fig. 7 in a horizontal cross section similar to Fig. 5(a), the bolt 3 may be passed through the holes 213 provided at corresponding positions of both flanges 212 and the holes 112 of the opposing side walls of the foundation body 11. In this case, the degree of fixation of the leg 21 is improved, the leg 21 is less likely to tilt or shift in position within the foundation body 11, and the leg 21 can be easily maintained in verticality and planar position until the filling material 7 is filled.

[0044] There are no particular limitations on the number and arrangement of bolts 3, or the number and arrangement of mounting plates 41. The method of joining legs 21 and mounting plates 41 is not limited to fastening with bolts and nuts.

[0045] In the above embodiment, H-shaped steel is used as the leg 21 of the equipment stand 2, but a square steel pipe may be used instead. In this case, the bolt 3 is arranged to penetrate the opposing surfaces of the square steel pipe, so that the leg 21 is less likely to tilt or shift in position within the foundation body 11, as in the above embodiment. In addition, the foundation body 11 in this embodiment is in the shape of a square tube, but the shape of the foundation body 11 is not limited to this and may be cylindrical. In addition, other penetrating materials may be used instead of the bolt 3.

[0046] Furthermore, although the equipment stand 2 in this embodiment is formed by joining divided parts, the equipment stand 2 may not need to be divided depending on the scale. The shape of the equipment stand 2 is also not particularly limited as long as it has legs 21. Furthermore, in this embodiment, the filler 7 is filled inside the foundation body 11 after the construction of the slab 6, but if there is no problem with lifting, the filler 7 may be filled in advance inside the foundation body 11 before lifting the equipment stand 2 and the foundation body 11.

[0047] In this embodiment, the equipment stand 2 is installed on the roof of the building, but the equipment stand 2 may be installed in a location that requires lifting by a lifting device such as a crane, i.e., in a high place. Depending on the structure of the building, the legs 21 of the equipment stand 2 may be fixed to a member other than the beam 4.

[0048] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to the above examples. It is clear that a person skilled in the art can come up with various modified or altered examples within the scope of the technical ideas disclosed in this application, and it is understood that these also naturally belong to the technical scope of the present invention. [Explanation of symbols]

[0049] 1: Mechanical Basics 2: Equipment stand 3: Bolt (penetrating material) 4:Beam 5: Wedge material 6: Slab 7: Filling material 10:Fundamental structure 11: Basic body 21: Legs 22: Horizontal beam 41: Mounting plate 42: Fastener 43: Stud 111: Flange part 112: Hole 113: Hole filling material 211:Web 212: Flange 213: Hole 214: Water stop plate

Claims

1. A construction method for an equipment rack erected on a machine foundation, comprising the steps of: a step of inserting the legs of an equipment rack into the inside of a cylindrical foundation body of a machine foundation made of precast concrete, and attaching the foundation body to the legs by means of a penetrating member passed through the opposing side walls of the foundation body and the legs; A process of lifting the foundation body and the equipment stand as a whole and suspending them at an installation location of the leg; Fixing the legs to the installation locations; Equipped with A construction method for an equipment stand, comprising filling the inside of the foundation body with a filling material.

2. The installation location of the leg is the upper surface of the beam, The lower end of the leg protrudes downward from the base body, The leg is fixed to the installation location by joining a mounting plate provided on the upper surface of the beam to the lower end of the leg, 2. The method for constructing an equipment rack according to claim 1, further comprising the step of pouring a slab of concrete onto the beams after the legs are fixed.

3. The leg is formed of an H-shaped steel, 2. The method for constructing an equipment rack according to claim 1, wherein the penetrating material is passed through a web of the leg.

4. The leg is formed of an H-shaped steel, 2. The method for constructing an equipment rack according to claim 1, wherein the penetrating member is passed through both flanges of the leg.

5. A foundation structure for an equipment rack erected on a machine foundation, The legs of the equipment rack are inserted into the inside of the foundation body of the cylindrical machine foundation made of precast concrete, and a penetration member is passed through the opposing side wall portions of the foundation body and the legs, The leg is fixed to the installation location of the leg, A foundation structure for an equipment rack, characterized in that a filler material is filled inside the foundation body.

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