Substructure and method of manufacturing the same

Abstract

To provide a foundation structure which enables a worker to properly adjust the level of a base plate.MEANS: A foundation structure includes a fixed plate arranged on leveling concrete, a level adjustment bolt extending upward from the fixed plate, an anchor plate provided on the level adjustment bolt so as to be movable in a vertical direction, an anchor bolt extending upward from the anchor plate, and a base plate supported on an upper part of the anchor bolt.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a substructure and a method for manufacturing the same. [Background technology]

[0002] Conventionally, a base plate is fixed to a foundation portion of the ground using anchor bolts (for example, Patent Document 1). In order to accurately attach the anchor bolts and the base plate to predetermined positions, it is preferable to accurately pour basing concrete and install the foundation structure in an appropriate position.

[0003] Conventionally, to adjust the level of the base plate, an adjustment member such as a so-called iron ball is installed under the base plate. In this case, after the base plate is adjusted, a material such as grout is injected under the base plate to fix the base plate to the foundation. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-144381 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in recent years, there has been a shortage of skilled concrete pourers, and in some cases, concrete is poured by unskilled workers. This results in poor accuracy in the concrete placement. In particular, poor accuracy in the placement of the basal concrete makes it impossible to accurately install the anchor bolts and base plates in the predetermined positions. Furthermore, poor accuracy in the placement of the basal concrete makes it time-consuming to adjust the installation positions of the anchor bolts and base plates.

[0006] Furthermore, the work of adjusting the base plate level using an adjustment device installed under the base plate and then injecting materials such as grout places a heavy burden on the worker.

[0007] Furthermore, when a horizontal force is applied to the base plate, the base plate may move slightly in the horizontal direction. To prevent this, large-diameter anchor bolts have traditionally been used for embedding in concrete, which increases the workload.

[0008] The present disclosure has been made in view of these problems, and an object of the present disclosure is to provide a foundation structure and a manufacturing method thereof that are capable of attaching anchor bolts and base plates to predetermined positions with high precision, reducing the number of steps involved in installing a foundation structure, and firmly fixing anchor bolts and base plates to foundation portions. [Means for solving the problem]

[0009] A foundation structure according to an example of the present disclosure includes: a fixing plate to be placed in the basal concrete; a level adjustment bolt extending upward from the fixing plate; an anchor plate provided on the level adjustment bolt so as to be movable in the up and down direction; an anchor bolt extending upward from the anchor plate; and a base plate supported on the upper portion of the anchor bolt.

[0010] A method for manufacturing a substructure according to an example of the present disclosure includes: placing a fixing plate in the basal concrete; placing an anchor plate on a leveling bolt extending upward from the fixed plate; adjusting the level of the anchor plate; and placing a base plate on top of the anchor bolts extending upward from the anchor plate. [Effects of the Invention]

[0011] According to the foundation structure and the manufacturing method thereof according to the embodiment of the present disclosure, it is possible to attach the base plate to a predetermined position with high precision, reduce the number of steps involved in installing the foundation structure, and firmly fix the base plate to the foundation part. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic view of the exterior of a building. [Figure 2] FIG. 2 is a diagram for explaining a foundation structure installed in an area A in FIG. [Figure 3A] FIG. 10 is a plan view showing an example of a level frame. [Figure 3B] FIG. 10 is a side view showing an example of a height adjustment unit. [Figure 4] 1 is a flowchart showing an example of a procedure for earthworks. [Figure 5] A diagram showing the waste container level adjustment device placed on the ground. [Figure 6] FIG. 10 is a diagram for explaining pouring of basal concrete. [Figure 7] 10 is a flowchart showing an example of a work procedure for foundation framework construction. [Figure 8] FIG. 1 is a perspective view of an anchor plate leveling device placed on basal concrete. [Figure 9] FIG. 10 is a perspective view of the anchor plate level adjustment device with an anchor bolt placed on the anchor plate. [Figure 10] FIG. 10 is a diagram showing a state in which a base plate is placed on an anchor bolt. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the drawings, for convenience of explanation, directions in space may be indicated using three axes, XYZ. In particular, the Z direction corresponds to the direction of gravity (vertical direction), the +Z direction represents an upward direction, and the -Z direction represents a downward direction. The X direction and the Y direction are both perpendicular to the Z direction. That is, the X direction and the Y direction correspond to the horizontal direction. The X direction and the Y direction are perpendicular to each other. Note that the X direction is not limited to the direction shown in the drawings and can be any direction within a horizontal plane, and the Y direction can also be any direction accordingly.

[0014] FIG. 1 is a schematic external view of a building. The building 1 includes a foundation 3 and a main body 5. The foundation 3 is a supporting structure formed below ground level and made of, for example, concrete. The main body 5 is a shed supported by the foundation 3 and formed above ground level. The main body 5 is, for example, a warehouse. The main body 5 includes a skeleton 11, exterior walls 13, a roof 15, and a spandrel wall 17. The skeleton 11 includes a plurality of steel columns 21 extending in the Z direction from the foundation 3 and a plurality of steel beams 23 (beams) extending in the X direction and Y direction between the plurality of steel columns 21. The steel columns 21 and the steel beams 23 are, for example, H-shaped steel. The steel columns 21 and the steel beams 23 may also be square columns. The exterior wall 13 is, for example, a plate material arranged on the side surface on the -Y side of the main body 5. The spandrel wall 17 is a member arranged on the foundation 3. The spandrel wall 17 is, for example, formed of concrete. The spandrel wall 17 may be constructed by a wet construction method or a dry construction method (PC construction method). The roof 15 is provided on top of the main body 5 and prevents raindrops from entering the main body 5.

[0015] Fig. 2 is a diagram for explaining the foundation structure installed in range A in Fig. 1. Note that in Fig. 2, some of the concrete poured into the foundation 3 is not shown.

[0016] A basin concrete level adjustment device 30 and a column base unit 31 are placed on the foundation 3. The basin concrete level adjustment device 30 is a device for adjusting the level of the basin concrete. Here, "level" refers to the flatness of the basin concrete surface and the parallelism between the basin concrete surface and a horizontal plane. The column base unit 31 is a metal fitting installed on the basin concrete level adjustment device 30 to enable the steel column 21 to be supported by the foundation 3. The column base unit 31 includes an anchor plate level adjustment device 32 and a base 33. The anchor plate level adjustment device 32 is a device for adjusting the parallelism between the upper or lower surface of the base plate (described later) and a horizontal plane. The base 33 is a member for supporting the steel column 21. The base 33 has a shape similar to that of the steel column 21 shortened in the vertical direction and can also be considered the lower end of the steel column 21. The base 33 functions as the lower end of the steel column 21 while also functioning as a foundation material for supporting the steel column 21.

[0017] The dump concrete level adjustment device 30 is placed on the compacted crushed stone. The dump concrete level adjustment device 30 includes, for example, a frame bottom plate 41, a height adjustment unit 42, a level frame 43, and a level adjustment unit 45.

[0018] The frame bottom plate 41 is a component placed on the ground. The frame bottom plate 41 is placed on, for example, compacted crushed stone. The frame bottom plate 41 is, for example, a rectangular metal sheet. Peg holes 41a are provided near the four corners of the frame bottom plate 41. Fixing devices (not shown) are driven into the peg holes to secure the frame bottom plate 41 to the crushed stone.

[0019] The height adjustment part 42 is a member that serves as a reference for the height of the basing concrete. The height adjustment part 42 includes a high nut 42a and a height adjustment bolt 42b. The high nut 42a is a member that extends upward from the frame bottom plate 41. The high nut 42a is placed near the center of the frame bottom plate 41. The high nut 42a is positioned so that its central axis is vertical.

[0020] The height adjustment bolt 42b is provided on the upper part of the high nut 42a and is a member whose position can be adjusted in the vertical direction. The height adjustment bolt 42b is screwed into the high nut 42a. The height of the bolt head of the height adjustment bolt 42b is adjusted by rotating it clockwise or counterclockwise relative to the high nut 42a in a plan view.

[0021] The level frame 43 is a member used to adjust the height of the sacrificial concrete, its parallelism with the horizontal plane, and its flatness. Fig. 3A is a plan view showing an example of level frame 43. Fig. 3B is a side view showing an example of a height adjustment part. Level frame 43 includes a band part 43a and a fixed flat part 43b.

[0022] The band portion 43a is a member formed by joining both ends of a band-shaped metal plate to each other. The band portion 43a is formed, for example, in a circular shape in a plan view. The fixed flat plate portion 43b is a member that receives the pressing force of the spring 45c, as will be described later. The fixed flat plate portion 43b is a member that is formed integrally with the band portion 43a and connected to the lower end of the band portion 43a. The fixed flat plate portion 43b is bent inward from the lower end of the band portion 43a. Furthermore, the fixed flat plate portion 43b has a through hole formed therein through which the level adjustment bolt 45a, which will be described later, passes. Note that the fixed flat plate portion 43b may be a member that is formed integrally with the band portion 43a and connected to the upper end of the band portion 43a. In this case, the fixed flat plate portion 43b is bent inward from the upper end of the band portion 43a. Furthermore, the fixed flat plate portion 43b may be provided at both the upper and lower ends of the band portion 43a.

[0023] The level adjustment unit 45 is a member for adjusting the level of the level frame 43. Here, the level of the level frame 43 is a concept that includes at least one of the height of the upper end of the level frame 43 and the parallelism between a plane including the upper end of the level frame 43 and a horizontal plane. At least three level adjustment units 45 are arranged on the frame bottom plate 41. The level adjustment unit 45 includes a level adjustment bolt 45a, a level adjustment nut 45b, and a spring 45c.

[0024] The level adjustment bolt 45a is a member extending upward from the frame bottom plate 41. The level adjustment bolt 45a is welded onto the frame bottom plate 41 with its head facing downward and its central axis vertical. As described above, at least three level adjustment parts 45 are arranged on the frame bottom plate 41. Therefore, at least three level adjustment bolts 45a are also arranged.

[0025] The level adjustment nut 45b is a nut provided on the level adjustment bolt 45a. That is, the level adjustment nut 45b is screwed onto the level adjustment bolt 45a. The level adjustment nut 45b moves up and down by rotating on the level adjustment bolt 45a. That is, the level adjustment nut 45b moves in the height direction by rotating clockwise or counterclockwise relative to the level adjustment bolt 45a in a plan view.

[0026] The spring 45c is a coil spring. The level adjustment bolt 45a is inserted into the inside of the spring 45c. That is, the shaft portion of the level adjustment bolt 45a is inserted into the inside of the spring 45c. The spring 45c is inserted between the head of the level adjustment bolt 45a and the fixed flat portion 43b of the level frame 43. The spring 45c is a compression spring. That is, the spring 45c urges the level frame 43 upward.

[0027] The level frame 43 radially surrounds the high nut 42a and is supported by the level adjustment bolt 45a via the spring 45c. The lower end of the level adjustment nut 45b abuts against the upper end of the band portion 43a of the level frame 43. In other words, the level adjustment nut 45b restricts the upward movement of the level frame 43, which is biased upward by the spring 45c.

[0028] As will be described in detail later, the level frame 43 of the basin concrete level adjustment device 30 adjusts the level based on the height of the height adjustment section 42. In addition, basin concrete is poured in accordance with the upper end of the level frame 43.

[0029] Returning now to the explanation of Figure 2, the anchor plate level adjustment device 32 is a device for adjusting the level of a base plate, which will be described later. The anchor plate level adjustment device 32 is placed on poured mortar concrete. The anchor plate level adjustment device 32 includes a fixing plate 51, a level adjustment bolt 52, an anchor adjustment nut 53, an anchor plate 54, an anchor bolt 55, and a base adjustment nut 56.

[0030] The fixing plate 51 is a member that supports the anchor plate 54 via the level adjustment bolts 52. The fixing plate 51 is, for example, a metal plate with a thickness of about several millimeters. At least three fixing plates 51 are placed on the basal concrete. Through holes are formed in predetermined positions of the fixing plate 51. After the anchor plate level adjustment device 32 is installed on the basal concrete, post-installed anchors 51a are inserted into the through holes formed in the fixing plate 51, and the anchor plate level adjustment device 32 is fixed on the basal concrete by the post-installed anchors 51a. The post-installed anchors 51a are, for example, hole-in anchors.

[0031] The level adjustment bolts 52 are bolts that extend upward from the fixed plates 51. In other words, the level adjustment bolts 52 are supported by the fixed plates 51. The level adjustment bolts 52 are fixed to the fixed plates 51 by welding. The level adjustment bolts 52 are, for example, stud bolts. At least three level adjustment bolts 52 are arranged to match the number of fixed plates 51.

[0032] The anchor adjustment nut 53 is a nut provided on the level adjustment bolt 52. That is, the anchor adjustment nut 53 is screwed onto the level adjustment bolt 52. The anchor adjustment nut 53 moves up and down by rotating on the level adjustment bolt 52. The anchor adjustment nut 53 is used to adjust the level of the anchor plate 54 by clamping it from above and below.

[0033] The anchor plate 54 is a plate supported by anchor adjusting nuts 53 attached to the level adjustment bolts 52. In other words, the nut of the anchor adjusting nuts 53 located below the anchor plate 54 supports the underside of the anchor plate 54. The anchor plate 54 is, for example, rectangular when viewed from the top-bottom direction, and has, for example, a circular opening 54a formed in the center that penetrates in the top-bottom direction. The anchor plate 54 also has through holes formed therein, into which the level adjustment bolts 52 are inserted. At least three through holes are formed therein, into which the level adjustment bolts 52 are inserted. The anchor plate 54 also has through holes formed therein, into which the anchor bolts 55 are inserted. At least three through holes are formed therein, into which the anchor bolts 55 are inserted.

[0034] The anchor bolts 55 are inserted into through holes formed in the anchor plate 54. That is, the anchor bolts 55 are bolts that extend upward from the anchor plate 54. The anchor bolts 55 are, for example, stud bolts. Nuts are attached near the lower ends of the anchor bolts 55, and the nuts prevent the anchor bolts 55 from falling out of the through holes formed in the anchor plate 54. At least three anchor bolts 55 are arranged, matching the number of through holes formed in the anchor plate 54.

[0035] The base adjustment nut 56 is a nut attached near the upper end of the anchor bolt 55. In other words, the base adjustment nut 56 is provided on the anchor bolt 55. The base adjustment nut 56 moves up and down by rotating on the anchor bolt 55. The base adjustment nut 56 is used to adjust the level of a base plate (described later) by clamping the base plate from above and below. In other words, the nut of the base adjustment nut 56 located below the base plate supports the underside of the base plate.

[0036] The base 33 is a member that supports the steel column 21. The base 33 is a member that extends in the vertical direction and has plates attached to the upper and lower ends. The member that extends in the vertical direction is, for example, an H-shaped steel. The plates attached to the upper and lower ends of the member that extends in the vertical direction are, for example, formed in a substantially rectangular shape in a plan view. Furthermore, near the four corners of the plate, through-holes that penetrate from top to bottom are formed. Hereinafter, the plate portion attached to the lower end of the member that extends in the vertical direction will be referred to as the base plate 61.

[0037] The anchor bolt 55 is inserted from below into the through hole formed in the base plate 61. The lower surface of the base plate 61 is supported by the base adjustment nut 56. That is, the base adjustment nut 56 supports the underside of the base plate 61. As described above, the base adjustment nut 56 is attached near the upper end of the anchor bolt 55. Therefore, the base plate 61 is supported by the upper part of the anchor bolt 55.

[0038] The base plate 61 has a shear plate 63 extending downward from its lower surface. The shear plate 63 is, for example, a plate extending in the X and Y directions from the center of the base plate 61. The shear plate 63 is fixed to the lower surface of the base plate 61 by, for example, welding.

[0039] Next, the construction procedure for a foundation structure will be described. When constructing a foundation structure, earthwork is carried out first, then foundation framework work is carried out, and finally steel frame work is carried out.

[0040] 4 is a flowchart showing an example of a work procedure for earthwork. In earthwork, first, the ground is compacted (step S11). Compaction is performed using, for example, a vibrator. Next, the dump concrete level adjustment device 30 is placed on the ground (step S12).

[0041] 5 is a diagram showing the state in which the throw-away container level adjustment device 30 is placed on the ground. The throw-away container level adjustment device 30 is placed on compacted ground. Once the throw-away container level adjustment device 30 is placed on the ground, fasteners are inserted into the stake holes 41a formed in the frame bottom plate 41, and the frame bottom plate 41 is fixed to the ground.

[0042] Next, height adjustment is performed in the throw-away container level adjustment device 30 (step S13). In height adjustment, first, the height adjustment bolt 42b is rotated so that the height of the head of the height adjustment bolt 42b becomes a reference height. Next, each level adjustment nut 45b is rotated so that the height of the level frame 43 matches the height of the height adjustment bolt 42b.

[0043] Next, level adjustment is performed in the basing concrete level adjustment device 30 (step S14). In the level adjustment, the height of each height adjustment bolt 42b is adjusted so that the plane including the upper end of the level frame 43 is horizontal. After the level adjustment is completed, basing concrete is poured (step S15).

[0044] 6 is a diagram for explaining the pouring of basin concrete. Basin concrete 46 is poured so that its height coincides with the upper end of the level frame 43. In other words, the surface of basin concrete 46 and the upper end of the level frame 43 are flush with each other. As a result, the basin concrete is placed with high precision. The earthwork is completed when basin concrete 46 hardens. Once the earthwork is completed, the foundation framework construction begins.

[0045] 7 is a flowchart showing an example of a work procedure for foundation skeleton construction. In the foundation skeleton construction, first, the anchor plate level adjusting device 32 is placed on the basing concrete 46 (step S21).

[0046] 8 is a perspective view of the anchor plate level adjustment device 32 placed on the basal concrete 46. First, the fixing plate 51 is placed on the basal concrete 46, and then the fixing plate 51 is fixed to the basal concrete 46 by post-installed anchors 51a. Next, the anchor plate 54 is attached to the level adjustment bolt 52.

[0047] Next, level adjustment is performed (step S22). In the level adjustment, the level of the anchor plate 54 is adjusted by rotating each anchor adjustment nut 53. After the level adjustment is completed, the anchor bolt 55 is placed in the anchor plate 54 (step S23).

[0048] 9 is a perspective view of the anchor plate level adjustment device 32 in a state where the anchor bolt 55 is placed on the anchor plate 54. The anchor plate 54 is fixed to the anchor bolt 55 by sandwiching the anchor plate 54 from above and below with nuts that thread onto the anchor bolt 55.

[0049] Next, the level of the base adjusting nuts 56 is adjusted (step S24). The level adjustment of the base adjusting nuts 56 means adjusting the height of each base adjusting nut 56 to match each other. In other words, the level adjustment of the base adjusting nuts 56 means adjusting the height of each base adjusting nut 56 attached to each anchor bolt 55 to match each other. Next, the base plate 61 is placed on the anchor bolt 55 (step S25).

[0050] 10 is a diagram showing a state in which a base plate 61 is placed on an anchor bolt 55. The base plate 61 is placed on a base adjusting nut 56 whose level has been adjusted. As shown in FIG. 10, after the base plate 61 is placed on the base adjusting nut 56, a nut is attached to the anchor bolt 55 so as to sandwich the base plate 61 together with the base adjusting nut 56. In this way, the base plate 61 is fixed to the anchor bolt 55.

[0051] Once the base plate 61 is fixed to the anchor bolts 55, concrete is poured (step S26). The concrete is poured until it reaches at least the top edge of the base plate 61. In other words, the concrete is poured so that it is in close contact with the shear plate 63, thereby restricting horizontal movement of the base plate 61.

[0052] As described above, the foundation includes the fixing plate 51 placed on the basal concrete 46, the level adjustment bolts 52 extending upward from the fixing plate 51, the anchor plate 54 attached to the level adjustment bolts 52 so as to be movable up and down, the anchor bolts 55 extending upward from the anchor plate 54, and the base plate 61 supported by the upper portions of the anchor bolts 55. Therefore, a worker can easily adjust the level of the anchor plate 54. This allows the worker to accurately attach the base plate 61 to a predetermined position. Furthermore, the use of the foundation disclosed herein eliminates the need for installing iron balls or injecting grout to adjust the level of the base plate. Furthermore, the foundation disclosed herein allows the anchor bolts 55 to be accurately positioned to a predetermined position. Therefore, the diameter of the through-holes formed in the base plate 61 does not need to be larger than necessary. As a result, it is not necessary to insert washers between the nuts for fixing the base plate 61 and the base plate 61, nor is it necessary to weld the washers to the base plate 61. In other words, several steps involved in installing the foundation are eliminated. As a result, Building 1 can be constructed in a short period of time.

[0053] The foundation structure also includes anchor adjusting nuts 53 that are attached to the level adjusting bolts 52 and positioned below the anchor plates 54. The anchor adjusting nuts 53 move up and down by rotating on the level adjusting bolts 52, and support the underside of the anchor plates 54. This allows, for example, a worker to easily adjust the level of the anchor plates 54 simply by rotating the anchor adjusting nuts 53.

[0054] The foundation structure also includes a base adjustment nut 56 that is attached to the anchor bolt 55 and positioned below the base plate 61. The base adjustment nut 56 moves up and down by rotating on the anchor bolt 55, and supports the underside of the base plate 61. This allows the worker to easily adjust the level of the base adjustment nut 56 simply by rotating the base adjustment nut 56.

[0055] An opening 54a that penetrates vertically is formed in the center of the anchor plate 54 when viewed from the top and bottom. This allows the worker to spread the concrete evenly over the foundation portion.

[0056] The base plate 61 also has a shear plate 63 extending downward from its bottom surface. This allows the base plate 61 to be firmly fixed to the concrete. In other words, the horizontal movement of the base plate 61 is restricted by the shear plate 63. In this case, the anchor bolts do not need to play the role of restricting the horizontal movement of the base plate. Therefore, anchor bolts with small diameters can be used as long as they satisfy the required tensile force.

[0057] Furthermore, the method for manufacturing a foundation structure according to the present disclosure includes the steps of placing a fixing plate 51 on basal concrete 46, placing an anchor plate 54 on level adjustment bolts 52 extending upward from the fixing plate 51 (step S21), adjusting the level of the anchor plate 54 (step S22), and placing a base plate 61 on top of the anchor bolts 55 extending upward from the anchor plate 54. As a result, in the method for manufacturing a foundation structure according to the present disclosure, adjusting the level of the anchor plate 54 can simplify subsequent level adjustments, for example, of base adjustment nuts 56 (step S24).

[0058] This concludes the description of the foundation structure according to the present invention, but the present invention is not limited to the above-described embodiment and can be modified within the scope of the gist of the invention. [Explanation of symbols]

[0059] 3 Foundation (foundation structure) 32 Anchor plate level adjustment device 46 Concrete 51 Fixing plate 52 Level adjustment bolt 53 Anchor adjustment nut 54 Anchor Plate 54a aperture 55 anchor bolt 56 Base adjustment nut 61 Base Plate 63 Shear Plate

Claims

1. a fixing plate to be placed in the basal concrete; a level adjustment bolt extending upward from the fixing plate; an anchor plate provided on the level adjustment bolt so as to be movable in the up and down direction; an anchor bolt extending upward from the anchor plate; a base plate supported on an upper portion of the anchor bolt, A foundation structure characterized by:

2. an anchor adjustment nut provided on the level adjustment bolt and positioned below the anchor plate, the anchor adjustment nut moving up and down by rotating on the level adjustment bolt and supporting the underside of the anchor plate; The foundation structure according to claim 1 .

3. a base adjustment nut provided on the anchor bolt and positioned below the base plate, the base adjustment nut moving vertically by rotating on the anchor bolt and supporting the underside of the base plate; The foundation structure according to claim 1 .

4. An opening penetrating in the vertical direction is formed in the center of the anchor plate when viewed from the vertical direction. The foundation structure according to claim 1 .

5. The base plate has a shear plate extending downwardly from a lower surface. The foundation structure according to claim 1 .

6. placing a fixing plate in the basal concrete; placing an anchor plate on a leveling bolt extending upward from the fixed plate; adjusting the level of the anchor plate; and placing a base plate on top of the anchor bolts extending upward from the anchor plate. A method for manufacturing a substructure, comprising:

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