Column base structures and buildings

Abstract

To suppress deterioration of transmission efficiency of a horizontal force from a column to a foundation skeleton in a configuration where an adjustment plate for adjusting a position in a vertical direction of the column is placed between the column and the foundation skeleton.SOLUTION: A column base structure comprises: a base plate that supports one column; and adjustment plates that are piled up between the base plate and a support plate mounted on a foundation skeleton, are made small compared to the base plate in a plan view, and adjust a position in a vertical direction of the one column by being inserted and removed. In addition, the column base structure comprises pressing members that are placed outside the adjustment plates in a plan view and press the base plate against the foundation skeleton side.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a column base structure and a building equipped with this base structure. [Background technology]

[0002] Patent Document 1 describes a building construction method on soft ground. Specifically, a level adjustment plate is placed between the base plate installed at the bottom end of the building's column base and the building frame so that the thickness is set to a predetermined value according to each location. This level adjustment plate is placed so that it can be inserted and removed freely from a predetermined direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-146596 Summary of the Invention [Problem to be solved by the invention]

[0004] In a building with multiple columns, uneven settlement can cause the vertical position of one column to move relative to the vertical positions of the other columns, resulting in forced displacement and forced stresses in the columns.

[0005] To solve this problem, a removable adjustment plate is placed between the bottom end of one of the pillars and the foundation body to adjust the vertical position of the pillar. Specifically, multiple adjustment plates are stacked, and the pillar is attached to the foundation body with anchor bolts inserted into through holes formed in the adjustment plates.

[0006] Here, the frictional force generated between one adjustment plate and the other adjustment plate may be weak only by the long-term vertical axial force applied to the column. In such a case, when a horizontal external force is applied to the column, the one adjustment plate will shift horizontally relative to the other adjustment plate, reducing the efficiency of transmission of the horizontal force from the column to the foundation body.

[0007] The object of the present invention is to suppress a decrease in the efficiency of transmission of horizontal force from a column to a foundation structure in a configuration in which an adjustment plate for adjusting the vertical position of the column is arranged between the column and the foundation structure. [Means for solving the problem]

[0008] The column base structure described in claim 1 is characterized by comprising a base plate supporting at least one of a plurality of columns provided in a building, a support plate arranged below the base plate and attached to a foundation body, an adjustment plate stacked between the support plate and the base plate and smaller than the base plate in a planar view and inserted and removed to adjust the vertical position of the one column, an anchor bolt inserted into a through hole formed in the adjustment plate and attaching the one column to the foundation body, and a pressing member arranged outside the adjustment plate in a planar view and pressing the base plate toward the foundation body.

[0009] According to the configuration of claim 1, an adjustment plate that adjusts the vertical position of one of the pillars by being inserted and removed is placed between the base plate supporting one of the pillars and the support plate attached to the foundation body. Furthermore, a pressing member that presses the base plate against the foundation body is placed on the outer side of the adjustment plate in a plan view.

[0010] In this way, the pressing member presses the base plate toward the foundation body, and the frictional force generated between the one adjustment plate and the other adjustment plate becomes stronger than when the pressing member is not pressed. As a result, in a configuration in which an adjustment plate that adjusts the vertical position of the one pillar is disposed between the one pillar and the foundation body, it is possible to suppress a decrease in the efficiency of transmission of horizontal force from the one pillar to the foundation body.

[0011] The column base structure described in claim 2 is characterized in that, in the column base structure described in claim 1, the pressing member comprises a pressing bolt whose lower end portion is fixed to the support plate and extends upwardly and is inserted into a through hole formed in the base plate, and a nut tightened to the pressing bolt at a portion protruding upward from the base plate.

[0012] According to the configuration of claim 2, the base plate is pressed against the foundation body by tightening the nut onto the pressing bolt. In this manner, the base plate can be pressed against the foundation body with a simple configuration.

[0013] The column base structure according to claim 3 is characterized in that in the column base structure according to claim 2, a plurality of the pressing bolts are provided and are arranged so as to surround the adjustment plate in a plan view.

[0014] According to the column base structure of claim 3, the pressing bolt is disposed so as to surround the adjustment plate in a plan view, whereby the entire base plate can be pressed against the foundation body.

[0015] The column base structure described in claim 4 is the column base structure described in any one of claims 1 to 3, characterized in that the base plate supports the one column via a sliding bearing.

[0016] According to the column base structure of claim 4, the base plate supports the first column via a sliding bearing. Therefore, the efficiency of transmission of horizontal force from the first column to the base plate is reduced compared to when no sliding bearing is provided. Therefore, it is possible to prevent the overlapping first adjustment plate and the other adjustment plate from being misaligned in the horizontal direction.

[0017] The building described in claim 5 is characterized by comprising a beam connecting an upper end of one pillar to an upper end of another pillar, and a column base structure described in any one of claims 1 to 4 that constitutes the base of the one pillar.

[0018] According to the building of claim 5, the base of one of the columns is provided with the column base structure of any one of claims 1 to 4. For example, when the other columns move vertically downward due to uneven settlement, the adjustment plate of the column base structure provided at the base of the one column is removed, causing the one column to move vertically downward. This makes it possible to suppress forced displacement and forced stress caused by the forced displacement from occurring in the one column, the other columns, and the beam. Effect of the Invention

[0019] According to the present invention, in a configuration in which an adjustment plate for adjusting the vertical position of the pillar is arranged between the pillar and the foundation body, it is possible to suppress a decrease in the efficiency of transmission of horizontal force from the pillar to the foundation body. [Brief description of the drawings]

[0020] [Figure 1] 1A and 1B are schematic diagrams showing a building according to a first embodiment of the present invention. [Diagram 2] FIG. 6 is a cross-sectional view taken along line AA in FIG. 5, showing the column base structure according to the first embodiment of the present invention. [Diagram 3] FIG. 1 is a perspective view showing a column base structure according to a first embodiment of the present invention. [Figure 4] FIG. 1 is a plan view showing a column base structure according to a first embodiment of the present invention. [Diagram 5] FIG. 2 is a cross-sectional view showing an adjustment plate of the column base structure according to the first embodiment of the present invention. [Figure 6] FIG. 4 is a cross-sectional view showing a column base structure according to a second embodiment of the present invention. [Figure 7] FIG. 11 is an enlarged cross-sectional view showing a column base structure according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] First Embodiment A column base structure and a building according to a first embodiment of the present invention will be described with reference to Fig. 1 to Fig. 5. Note that arrow H shown in the drawings indicates the vertical direction and the building height direction, arrow W indicates the horizontal direction and the building width direction, and arrow L indicates the horizontal direction and the building depth direction. Note that arrows W and L are perpendicular to each other.

[0022] (Buildings 140) As shown in Fig. 1(A), the building 140 includes a steel pipe column 100, a steel pipe column 110 arranged spaced apart from the steel pipe column 100 in the building width direction, and a beam 120. The steel pipe column 100 and the steel pipe column 110 have a rectangular tubular cross section. The beam 120 extends in the building width direction and connects the upper end of the steel pipe column 100 and the upper end of the steel pipe column 110. The steel pipe column 100 is an example of one column, and the steel pipe column 110 is an example of the other column.

[0023] (Column base structure 10) 2 and 3, the column base structure 10 includes a base plate 12 supporting a steel pipe column 100, a support plate 16 partially embedded in a foundation structure 150, and a plurality of adjustment plates 36. Note that the support plate 16 only needs to be directly or indirectly attached to the foundation structure 150, and may be raised using adjustment mortar, for example.

[0024] The column base structure 10 also includes an anchor bolt 20 that attaches the steel pipe column 100 to the foundation body 150, and a nut 22 fastened to the anchor bolt 20. The column base structure 10 also includes a pressing bolt 26 that presses the base plate 12 toward the foundation body 150, and a nut 28 fastened to the pressing bolt 26.

[0025] [Base plate 12] The base plate 12 supporting the steel pipe pole 100 is attached to the lower end of the steel pipe pole 100 and has a rectangular shape in a plan view. Two wing plates 102 are attached to each corner of the rectangular steel pipe pole 100 by welding, as shown in Figs. 3 and 4. Specifically, one side of each of the two wing plates 102 is attached to each corner of the steel pipe pole 100 by welding so as to be perpendicular to each other in a plan view. The base plate 12 is attached to the lower end of the steel pipe pole 100 and the other side of the wing plate 102 by welding.

[0026] 2, the base plate 12 is formed with a plurality of through holes 12a into which the upper end portions of the anchor bolts 20 are inserted, and a plurality of through holes 12b into which the upper end portions of the pressing bolts 26 are inserted. Specifically, as shown in FIG. 4, twelve through holes 12a are formed so as to surround the steel pipe column 100 in a plan view, and eight through holes 12b are formed so as to surround the twelve through holes 12a. More specifically, the twelve through holes 12a are arranged at equal intervals so as to form a rectangle in a plan view, and the eight through holes 12b are arranged at equal intervals so as to form a rectangle in a plan view.

[0027] [Support plate 16] 2, the support plate 16 is disposed below the base plate 12. Furthermore, the support plate 16 has a rectangular shape in a plan view, and is partially embedded in the foundation structure 150 as described above.

[0028] Further, the support plate 16 is formed with a plurality of through holes 16a into which the lower end portions of the anchor bolts 20 are inserted, and through holes 16b into which the lower end portions of the pressing bolts 26 are inserted. Specifically, the through holes 16a of the support plate 16 are formed so as to overlap with the through holes 12a of the base plate 12 in a plan view, and the through holes 16b of the support plate 16 are formed so as to overlap with the through holes 12b of the base plate 12 in a plan view.

[0029] [Anchor bolt 20, nut 22] Twelve anchor bolts 20 are provided, extending in the vertical direction, and are arranged so as to surround the steel pipe column 100 in plan view, as shown in Fig. 4. The lower end portions of the anchor bolts 20 are inserted into the through holes 16a of the support plate 16 and embedded inside the foundation structure 150, as shown in Fig. 2.

[0030] Furthermore, the upper end portion of the anchor bolt 20 is inserted into the through hole 12a of the base plate 12 and protrudes above the base plate 12. A nut 22 is fastened to the portion of the anchor bolt 20 that protrudes above the base plate 12. In addition, a plurality of adjustment plates 36 are arranged between the support plate 16 and the base plate 12 in a stacked state.

[0031] In this configuration, the steel pipe column 100 is attached to the foundation body 150 via multiple adjustment plates 36 by tightening the nut 22 onto the anchor bolt 20.

[0032] [Adjustment plate 36] The adjustment plate 36 is a so-called filler plate, and a plurality of them are provided and arranged in a stacked state between the base plate 12 and the support plate 16 as shown in Fig. 2. In this embodiment, the thickness of the adjustment plate 36 is, for example, 40 [mm]. And, as shown in Fig. 4, the outer shape of the adjustment plate 36 is a rectangle that is larger than the steel pipe column 100 in a plan view and smaller than the base plate 12 in a plan view.

[0033] 5, the adjustment plate 36 has a rectangular cutout in the center. Furthermore, the adjustment plate 36 has twelve through holes 40 into which the anchor bolts 20 (see FIG. 2) are respectively inserted. The through holes 40 are arranged at equal intervals so as to form a rectangle in a plan view.

[0034] The adjustment plate 36 is divided into eight plate portions 38. Specifically, four plate portions 38 are arranged on the outside of a rectangle formed by arranging the multiple through holes 40, and four plate portions 38 are arranged on the inside. The eight plate portions 38 are shaped like strips.

[0035] Of the four outer plate sections 38, two plate sections 38 (hereinafter sometimes referred to as "plate sections 38a") are arranged facing each other in the building depth direction (arrow L direction), and two plate sections 38 (hereinafter sometimes referred to as "plate sections 38b") are arranged facing each other in the building width direction (arrow W direction). Plate sections 38a are longer than plate sections 38b, and plate sections 38b are arranged between each pair of plate sections 38a.

[0036] Of the four inner plate sections 38, two plate sections 38 (hereinafter sometimes referred to as "plate section 38c") are arranged facing each other in the building depth direction, and two plate sections 38 (hereinafter sometimes referred to as "plate section 38d") are arranged facing each other in the building width direction. Furthermore, plate section 38d is longer than plate section 38c, and plate section 38c is arranged between each pair of plate sections 38d.

[0037] The plate portions 38a, 38b, 38c, and 38d are each formed with an arc-shaped edge portion for forming the through hole 40. In other words, the through hole 40 of the adjustment plate 36 is formed by combining the edges formed on the plate portion 38.

[0038] In this configuration, when the pressing force pressing the base plate 12 toward the foundation body 150 is weakened, the plate portions 38a, 38b, 38c, and 38d are inserted and removed separately from between the base plate 12 and the support plate 16. In other words, the adjustment plate 36 is inserted and removed from between the base plate 12 and the support plate 16. The adjustment plate 36 is inserted and removed from between the base plate 12 and the support plate 16, whereby the vertical position of the steel pipe column 100 is adjusted.

[0039] [Press bolt 26, nut 28] There are eight press bolts 26, which are arranged to surround the anchor bolt 20 and the adjustment plate 36 in a plan view as shown in Fig. 4. Furthermore, the press bolts 26 extend in the vertical direction as shown in Fig. 2. The lower end portions of the press bolts 26 are inserted into the through holes 16b of the support plate 16, and the heads 26a of the press bolts 26 are arranged below the support plate 16. As a result, the lower end portions of the press bolts 26 are fixed to the support plate 16.

[0040] Furthermore, the upper end portion of the press bolt 26 is inserted into the through hole 12b of the base plate 12 and protrudes above the base plate 12. A nut 28 is fastened to the portion of the press bolt 26 that protrudes above the base plate 12.

[0041] In this configuration, by tightening the nut 28 onto the pressing bolt 26, the base plate 12 is pressed toward the foundation body 150, and the frictional force generated between one adjustment plate 36 and the other adjustment plate 36 becomes stronger.

[0042] (action) 1(A)(B), the uneven settlement may cause the vertical position of the steel pipe column 100 to move relatively to the vertical position of the steel pipe column 110. Specifically, the vertical position of the steel pipe column 110 may move downward relative to the vertical position of the steel pipe column 100. This causes a forced displacement and a forced stress caused by the forced displacement to occur in the steel pipe column 100, the steel pipe column 110, and the beam 120.

[0043] In such a case, the adjustment plates 36 of the column base structure 10 provided at the lower end of the steel pipe column 100 shown in Fig. 2 are removed. Specifically, the steel pipe column 100 is jacked up with the nuts 22 and 28 loosened. In this state, the plate portions 38a, 38b, 38c, and 38d shown in Fig. 5 are removed separately. The number of adjustment plates 36 corresponding to the amount of downward movement of the steel pipe column 100 is removed.

[0044] Then, after removing the adjustment plate 36, the steel pipe pole 100 is jacked down, and the nut 22 and the nut 28 are tightened to the anchor bolt 20 and the pressing bolt 26, and the work is completed. As a result, the vertical position of the steel pipe pole 100 becomes equal to the vertical position of the steel pipe pole 110.

[0045] (summary) As described above, in the building 140, when the steel pipe column 110 moves downward due to uneven settlement, the adjustment plate 36 of the column base structure 10 provided at the lower end of the steel pipe column 100 is removed. As a result, the vertical position of the steel pipe column 110 becomes equal to the vertical position of the steel pipe column 110.

[0046] Furthermore, in the building 140, the vertical position of the steel pipe column 100 is equivalent to the vertical position of the steel pipe column 110, so that forced displacement and forced stress caused by the forced displacement can be suppressed for the steel pipe column 100, the steel pipe column 110, and the beam 120.

[0047] In addition, in the column base structure 10, the base plate 12 is pressed against the foundation body 150 by tightening the nut 28 to the pressing bolt 26. This makes it possible to strengthen the frictional force generated between the one adjustment plate 36 and the other adjustment plate 36, compared to when the base plate 12 is not pressed against the foundation body 150. It is also possible to strengthen the frictional force generated between the one adjustment plate 36 and the other adjustment plate 36 by tightening the nut 22 to the anchor bolt 20. However, in the pressing bolt 26 and the nut 28, the base plate 12 is pressed against the foundation body 150 on the outer side (the side away from the steel pipe column 100) of the anchor bolt 20, so that the base plate 12 can be efficiently pressed against the foundation body 150.

[0048] Furthermore, in the column base structure 10, by increasing the frictional force generated between one adjustment plate 36 and another adjustment plate 36, it is possible to prevent the overlapping one adjustment plate 36 and the other adjustment plate 36 from shifting in the horizontal direction.

[0049] In addition, in the column base structure 10, by preventing one adjustment plate 36 from shifting horizontally from the other adjustment plate 36, it is possible to prevent a decrease in the efficiency of transmission of horizontal force from the steel pipe column 100 to the foundation body 150.

[0050] Moreover, in the column base structure 10, the pressing bolts 26 are disposed so as to surround the adjustment plate 36 in a plan view. This makes it possible to press the entire base plate 12 against the foundation body 150.

[0051] <Second embodiment> A column base structure and a building according to a second embodiment of the present invention will be described with reference to Fig. 6. Note that, regarding the second embodiment, the differences from the first embodiment will be mainly described.

[0052] (composition) In a building 340 of the second embodiment, as shown in Fig. 6, the base plate 12 of the column base structure 10 supports a steel pipe column 200 via a sliding bearing 220. The steel pipe column 200 is an example of a single column.

[0053] The steel pipe pole 200 has a rectangular tubular cross section, and wing plates 202 are attached to the corners of the steel pipe pole 200 by welding. Specifically, one side of each of the two wing plates 202 is attached to each corner of the steel pipe pole 200 by welding so as to be perpendicular to each other in a plan view. Then, a column base plate 212 having a rectangular shape in a plan view is attached to the lower end of the steel pipe pole 200 and the other side of the wing plate 202 by welding.

[0054] In addition, a sliding bearing 220 is disposed between the column base plate 212 and the base plate 12. The sliding bearing 220 includes a support portion 220a fixed to the column base plate 212, a sliding member 220b provided on the lower surface of the support portion 220a, and a sliding plate 220c fixed to the base plate 12.

[0055] (summary) In this configuration, the efficiency of transmitting horizontal force from the steel pipe column 200 to the base plate 12 decreases compared to when a sliding bearing is not provided. Therefore, it is possible to suppress the horizontal displacement of one overlapping adjustment plate 36 and another adjustment plate 36.

[0056] <Third embodiment> A column base structure and a building according to a third embodiment of the present invention will be described with reference to Fig. 7. Note that, regarding the third embodiment, the differences from the first embodiment will be mainly described.

[0057] (composition) 7, in the column base structure 310 according to the third embodiment, a nut 328 fastened to the press bolt 26 is provided on the opposite side of the base plate 12 to the nut 28 fastened to the press bolt 26. In other words, the base plate 12 is sandwiched between the nut 28 and the nut 328. That is, the outer peripheral portion of the base plate 12 is sandwiched between the nuts 28 and the nuts 328 at multiple points along the outer peripheral edge.

[0058] (summary) In this way, the outer peripheral portion of the base plate 12 is sandwiched between the nuts 28 and the nuts 328 at multiple points along the outer peripheral edge, thereby determining the vertical position of the outer peripheral portion of the base plate 12. This allows the level of the base plate 12 to be adjusted.

[0059] In addition, by loosening the nut 28 and rotating the nut 328 to lift the base plate 12, the steel pipe column 100 can be jacked up using the nut 328.

[0060] Although the present invention has been described in detail with respect to the first, second, and third specific embodiments, it is clear to those skilled in the art that the present invention is not limited to these embodiments, and various other embodiments are possible within the scope of the present invention. For example, in the above embodiment, the steel pipe pole 100 is used for the description, but the present invention may be a steel column, a reinforced concrete column, a steel reinforced concrete column, a wooden column, etc.

[0061] In addition, in the above embodiment, a steel pipe column 100 having a rectangular tubular cross section was used for description, but the cross-sectional shape of the column may be a steel pipe column having a cylindrical cross section, an H-shaped steel beam, etc., or may be another shape.

[0062] Also, although not specifically described in the above embodiment, the building may be of steel frame construction, concrete-filled steel pipe construction, steel-reinforced concrete construction, reinforced concrete construction, wood construction, or other structure.

[0063] In addition, in the above embodiment, the base plate 12 and the support plate 16 are rectangular in plan view, but may be circular, polygonal, or other shapes in plan view. [Explanation of symbols]

[0064] 10 Pillar base structure 12 Base plate 12b Through hole 16 Support Plate 20 Anchor bolt 26 Press bolt 28 Nut 36 Adjustment plate 40 Through hole 100 Steel pipe column (example of one column) 110 Steel pipe column (an example of another column) 120 Beam 140 Buildings 150 Basic structure 200 Steel pipe column (example of the first column) 220 Sliding bearing 310 Column base structure 340 Buildings

Claims

1. A base plate supporting at least one of a plurality of columns provided in a building; A support plate disposed below the base plate and attached to a foundation body; an adjustment plate that is overlapped between the support plate and the base plate and is smaller than the base plate in a plan view, and that is inserted and removed to adjust the vertical position of the one column; An anchor bolt that is inserted into a through hole formed in the adjustment plate and attaches the first column to the foundation body; A pressing member that is disposed on the outer side of the adjustment plate in a plan view and presses the base plate against the foundation body; A column base structure equipped with:

2. The pressing member includes a pressing bolt having a lower end portion fixed to the support plate and extending upward and inserted into a through hole formed in the base plate, and a nut fastened to the pressing bolt at a portion protruding upward from the base plate; The column base structure according to claim 1 .

3. The pressing bolts are provided in plurality and are arranged so as to surround the adjustment plate in a plan view. The column base structure according to claim 2.

4. The base plate supports the first column via a sliding bearing. The column base structure according to any one of claims 1 to 3.

5. A beam connecting an upper end of one pillar to an upper end of the other pillar; A column base structure according to any one of claims 1 to 4 constituting a base portion of the one column; A building equipped with:

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