Column with level adjustment function

Abstract

To adjust a vertical level of a column without the need to provide a space for arranging jacks to enclose the column when viewed from above.SOLUTION: A column with a level adjustment function comprises: a foundation column in which a recess with an open top is formed; a steel strut supported on a bottom surface of the recess and provided with an upper end plate; an upper column placed above the steel strut and provided with a lower end plate; and a plurality of level adjustment bolts to which the upper end plate is attached using twisted nuts so that there is a gap between the lower end plate and the upper end plate in which a jack can be arranged.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to adjustable leveling columns. [Background technology]

[0002] The column base structure described in Patent Document 1 is a column base structure comprising a column body erected on the upper surface of the foundation, a base plate arranged at the lower end of the column body, and a bracket extending laterally from the side of the column body, wherein the base plate is made of a plate-like member having a planar shape larger than the cross-sectional shape of the column body, and a pair of recesses for mounting jacks are formed at opposing positions across the column body, and the bracket is arranged above the recesses. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-64244 A Summary of the Invention [Problem to be solved by the invention]

[0004] There is a column whose vertical level can be adjusted. The column base structure of this column includes a base plate that is placed on the top surface of the foundation beam and attached to the bottom end of the column, and a bracket that is provided above the base plate and protrudes from the column. In this type of column base structure, a jack is placed between the bracket protruding from the column and the top surface of the foundation beam, and the column's vertical level is adjusted using this jack.

[0005] However, in this configuration, the jacks are arranged so as to surround the pillar when viewed from above, which means that a space needs to be provided for arranging the jacks so as to surround the pillar when viewed from above.

[0006] The object of the present disclosure is to adjust the vertical level of a pillar without providing space for placing jacks surrounding the pillar when viewed from above. [Means for solving the problem]

[0007] The column with level adjustment function of the first embodiment is characterized in that it comprises a foundation column having a recess with an open top, a steel frame support column supported on the bottom surface of the recess and provided with an upper end plate, an upper column arranged above the steel frame support column and provided with a lower end plate, and a plurality of level adjustment bolts whose upper ends are attached to the lower end plate and to which the upper end plate is attached using screwed-in nuts so that a gap is provided between the lower end plate and the upper end plate to allow the positioning of a jack.

[0008] According to the above aspect, a gap is formed between the lower end plate and the upper end plate, in which a jack can be placed. The upper column is then lifted up using the jack placed in this gap.

[0009] In this way, the vertical level of the pillar can be adjusted without providing space for jacks to surround the pillar when viewed from above.

[0010] The column with level adjustment function of the second aspect is characterized in that, in the column with level adjustment function described in the first aspect, it comprises a horizontal restraint bolt extending upward from the top surface of the foundation column, a protrusion formed in the lower end plate and protruding horizontally relative to the upper column and having a through hole into which the horizontal restraint bolt is inserted, and a pair of other nuts that are screwed into the horizontal restraint bolt and sandwich the protrusion on both sides of the through hole.

[0011] According to the above aspect, the horizontal restraint bolt is inserted into the through hole formed in the protruding portion of the lower end plate. Then, the protruding portion of the lower end plate is clamped using a pair of other nuts screwed into the horizontal restraint bolt. This allows the upper column to be horizontally positioned relative to the foundation column.

[0012] The third aspect of the level adjustment column is characterized in that, in the level adjustment column described in the second aspect, when viewed from above, the protrusion portions are provided on both sides with the recess between them.

[0013] According to the above aspect, the protruding portion is provided on both sides between the recesses of the foundation pillar when viewed from above. This makes it possible to prevent the upper pillar from being disposed in a twisted state with respect to the foundation pillar when viewed from above. Effect of the Invention

[0014] According to the present disclosure, the vertical level of the pillar can be adjusted without providing space for placing jacks surrounding the pillar when viewed from above. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a front view showing a level-adjustable pillar according to an embodiment of the present disclosure. [Diagram 2] FIG. 1 is a side view of a level adjustable pillar according to an embodiment of the present disclosure. [Diagram 3] 1 is an oblique view showing a foundation column provided on a column with a level adjustment function according to an embodiment of the present disclosure; FIG. [Figure 4] FIG. 1 is a perspective view showing a steel support column of a column with a level adjustment function according to an embodiment of the present disclosure. [Diagram 5] FIG. 2 is a perspective view showing an upper pillar of a pillar with a level adjustment function according to an embodiment of the present disclosure. [Figure 6] 1A and 1B are front views used to explain the construction status of a column with a level adjustment function according to an embodiment of the present disclosure. [Figure 7] 1A and 1B are side views used to explain the construction status of a column with a level adjustment function according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] An example of a column with a level adjustment function according to an embodiment of the present disclosure will be described with reference to Figures 1 to 7. Arrow H shown in each figure indicates the up-down direction, i.e., the vertical direction, arrow W shown in each figure indicates the width direction perpendicular to arrow H and also the horizontal direction, and arrow D shown in each figure indicates the depth direction perpendicular to arrows H and W and also the horizontal direction.

[0017] (Overall composition) A column 10 with a level adjustment function according to the embodiment (hereinafter simply referred to as "column 10") includes a foundation column 12, a steel frame support column 30, an upper column 50, and a level adjustment bolt 70 (hereinafter referred to as "adjustment bolt 70"), as shown in Figures 1 and 2. A mat foundation is adopted for the structure in which this column 10 is used.

[0018] [Foundation pillar 12] The foundation pillar 12 is made of precast concrete and placed on the upper surface of a base concrete layer that serves as a mounting surface constructed on the ground. As shown in FIG. 3, the outer shape of the foundation pillar 12 is rectangular and extends in the vertical direction.

[0019] Additionally, a recess 14 that is open at the top is formed in the top surface 12a of the foundation pillar 12. The cross section of this recess 14 is rectangular, and the cross-sectional area of ​​the recess 14 gradually decreases from the top to the bottom. The lower end of the recess 14 is formed with a bottom surface 14a (see FIG. 1) that faces upward. Additionally, a drainage hole (not shown) that communicates with the outside is provided in the bottom of the recess 14, so that water does not accumulate in the recess 14.

[0020] Furthermore, the lower end portions of four horizontal restraint bolts 16 (hereinafter referred to as "restraint bolts 16") extending in the vertical direction are embedded in the top surface 12a of the foundation column 12. Specifically, a pair of restraint bolts 16 aligned in the width direction are disposed on one side and the other side with the recess 14 between them. In other words, a pair of restraint bolts 16 are disposed on both sides with the recess 14 between them.

[0021] [Steel pillar 30] 1 and 2, the steel column 30 is supported on the bottom surface 14a of the recess 14. The steel column 30 includes a support plate 32 disposed at the lower end and in contact with the bottom surface 14a, an upper end plate 34 disposed at the upper end, and a group of extension plates 36 sandwiched between the support plate 32 and the upper end plate 34 and extending in the vertical direction. The individual members constituting the steel column 30 are joined by welding or the like.

[0022] As shown in Fig. 4, the support plate 32 has a rectangular shape extending in the width direction with the plate thickness direction being the up-down direction. The extension plate group 36 includes a pair of plates 36a spaced apart in the width direction with the plate thickness direction being the width direction, and a plate 36b disposed between the pair of plates 36a with the plate thickness direction being the depth direction. The extension plate group 36 further includes triangular plates 36c disposed on the opposite sides of the plate 36b across the plate 36a and supporting the upper end plate 34.

[0023] The upper end plate 34 is rectangular in shape extending in the width direction with the plate thickness direction being the up-down direction. The upper surface of the upper end plate 34 is disposed in the same plane as the top surface 12a of the foundation column 12 (see Figs. 1 and 2). The upper end plate 34 is also formed with a through hole 34a into which the adjustment bolt 70 is inserted and a through hole 34b into which a reinforcing bar 58 (see Fig. 5) provided on the upper column 50 and extending downward is inserted. Specifically, six through holes 34a are provided, and two rows of three through holes 34a aligned in the width direction are formed in the depth direction. Four through holes 34b are provided, and two through holes 34b aligned in the depth direction are formed at both ends of the upper end plate 34 in the width direction.

[0024] [Upper column 50] As shown in Figures 1 and 2, the upper column 50 is positioned above the steel support column 30, and comprises a wooden column portion 52, a lower end plate 54 whose thickness direction is the up-down direction, and a reinforcing bar 58.

[0025] As shown in FIG. 5, the pillar portion 52 extends in the vertical direction and has a rectangular cross section, and the lower end plate 54 is attached to the lower end of the pillar portion 52.

[0026] The lower end plate 54 has a rectangular portion 54a that contacts the lower end of the column portion 52, and protruding portions 54b that protrude from the rectangular portion 54a to both sides in the width direction. Specifically, four protruding portions 54b are provided, and protrude from both sides in the depth direction of the rectangular portion 54a to one side and the other side in the width direction, respectively. As described above, the protruding portions 54b are provided at the four corners of the column portion 52, and are provided on both sides with the recess 14 of the foundation column 12 therebetween (see FIG. 2). Each of the protruding portions 54b is formed with a through hole 56 into which a restraining bolt 16 (see FIG. 2) is inserted.

[0027] In this configuration, as shown in Fig. 2, the restraining bolt 16 is inserted into the through hole 56 formed in the protruding portion 54b of the lower end plate 54. Then, the protruding portion 54b of the lower end plate 54 is clamped using a pair of nuts 42 screwed into the restraining bolt 16. This determines the horizontal position of the upper column 50 relative to the foundation column 12. The nuts 42 are an example of another nut.

[0028] On the other hand, as shown in Fig. 5, twelve reinforcing bars 58 are provided extending in the vertical direction and are arranged along the periphery of the rectangular portion 54a of the lower end plate 54. Specifically, the reinforcing bars 58 protrude downward from the inside of the column portion 52 through through holes (reference numerals omitted) formed in the lower end plate 54. Of the twelve reinforcing bars 58, four reinforcing bars 58 are adapted to be inserted into through holes 34b (see Fig. 4) formed in the upper end plate 34 of the steel frame support 30.

[0029] [Adjustment bolt 70] The adjustment bolts 70 are disposed below the lower end plate 54 of the upper column 50 so as to extend in the vertical direction, as shown in Figures 1 and 2. The upper ends of the adjustment bolts 70 are fixed to the lower surface of the lower end plate 54 using a fixing member (not shown), as shown in Figure 5. Specifically, six adjustment bolts 70 are provided, with three adjustment bolts 70 lined up in the width direction in two rows lined up in the depth direction.

[0030] In this configuration, as shown in Figs. 1 and 2, an adjustment bolt 70 is inserted into a through hole 34a (see Fig. 4) formed in the upper end plate 34 of the steel frame column 30. Then, the upper end plate 34 is sandwiched using a pair of nuts 44 screwed into the adjustment bolt 70. As a result, a gap 40 in which a jack can be placed is formed between the rectangular portion 54a of the lower end plate 54 and the upper end plate 34. In other words, the upper end plate 34 is sandwiched using a pair of nuts 44 screwed into the adjustment bolt 70 so that a gap 40 in which a jack can be placed is formed between the rectangular portion 54a of the lower end plate 54 and the upper end plate 34. Then, this gap 40 is formed inside the outer periphery of the column portion 52 in the upper column 50 when viewed from above.

[0031] (action) Next, a method for constructing the pillar 10 will be described. First, the distance between the lower end plate 54 and the upper end plate 34 is set to d1 as shown in Figures 1 and 2, and a gap 40 in which a jack can be placed is formed between the lower end plate 54 and the upper end plate 34. In this state, a pair of nuts 42 screwed into the restraining bolt 16 sandwich the protruding portion 54b of the lower end plate 54, and a pair of nuts 44 screwed into the adjustment bolt 70 sandwich the upper end plate 34.

[0032] 6(A) and 7(A), when the difference between the vertical position of the upper surface 100a of the floor slab 100 of the first floor and the vertical position of the lower end plate 54 of the upper column 50 is predetermined as d2, concrete is poured in the recess 14 and the upper part of the foundation column 12 so that a surface similar to the upper surface 100a of the floor slab 100 is formed at the opening of the floor slab 100. As a result, concrete is filled in the gap 40 between the lower end plate 54 and the upper end plate 34, and the reinforcing bar 58 protruding downward from the lower end plate 54 is embedded in the concrete. This reinforcing bar 58 functions as an anchoring reinforcing bar.

[0033] On the other hand, if ground subsidence occurs during construction of a structure manufactured using the column 10, as shown in FIG. 6(B) and FIG. 7(B), the foundation column 12 is disposed lower with respect to the upper surface 100a of the floor slab 100 compared to the case where ground subsidence does not occur. In such a case, the nuts 42 and 44 are loosened, and a jack (not shown) is disposed in the gap 40. Then, the upper column 50 is lifted using this jack. Specifically, the upper column 50 is lifted using the jack so that the difference between the vertical position of the upper surface 100a of the floor slab 100 of the first floor and the vertical position of the lower end plate 54 of the upper column 50 becomes difference d2. Then, after lifting the upper column 50, the pair of nuts 42 clamp the protruding portion 54b of the lower end plate 54, and the pair of nuts 44 clamp the upper end plate 34. Furthermore, multiple plates are inserted into the gap formed between the lower end plate 54 and the upper end plate 34 so that the load from the lower end plate 54 is transmitted to the upper end plate 34 via the inserted plates. Note that the plates may be inserted after or before the jack is removed.

[0034] In this state, the jack is removed, and concrete is poured into the recess 14 and the upper part of the foundation column 12 so that a surface similar to the upper surface 100a of the floor slab 100 is formed at the opening of the floor slab 100. As a result, concrete is filled into the gap 40 between the lower end plate 54 and the upper end plate 34, and the reinforcing bar 58 protruding downward from the lower end plate 54 is embedded in the concrete. This reinforcing bar 58 functions as an anchoring reinforcing bar. Although not shown in Figures 6(A)(B) and 7(A)(B), a gap closing plate that prevents the poured concrete from leaking from the gap between the floor slab 100 and the foundation column 12 is provided to connect the outer circumferential surface of the foundation column 12 and the back surface of the floor slab 100.

[0035] (summary) As described above, in the column 10, the gap 40 in which a jack can be placed is formed between the lower end plate 54 and the upper end plate 34. This makes it possible to adjust the vertical level of the column 10 without providing a space for placing jacks so as to surround the column when viewed from above. Specifically, it is possible to adjust the vertical position of the upper column 50 relative to the foundation column 12 without providing a space for placing jacks so as to surround the column when viewed from above.

[0036] 2, the restraining bolt 16 is inserted into the through hole 56 (see FIG. 5) formed in the protruding portion 54b of the lower end plate 54. Then, the protruding portion 54b of the lower end plate 54 is clamped using a pair of nuts 42 screwed into the restraining bolt 16. This allows the upper column 50 to be positioned horizontally relative to the foundation column 12.

[0037] In addition, in the column 10, when viewed from above, the overhanging portions 54b are provided on both sides with the recessed portion 14 of the foundation column 12 therebetween. This makes it possible to prevent the upper column from being twisted relative to the foundation column when viewed from above.

[0038] Moreover, in the column 10, when viewed from above, the overhanging portions 54b are provided at the four corners of the column portion 52. This makes it possible to further prevent the upper column from being disposed in a twisted state relative to the foundation column.

[0039] In addition, mat foundations may be used when constructing structures that are for a limited period of time, such as for international expositions. In such structures, when the ground subsides during construction, the use of the pillars 10 can deal with short-term ground subsidence.

[0040] Although the present disclosure has been described in detail with respect to a specific embodiment, it is clear to those skilled in the art that the present disclosure is not limited to the embodiment, and that various other embodiments are possible within the scope of the present disclosure. For example, in the above embodiment, the foundation columns 12 are made of precast materials, but they may be made of other materials.

[0041] In the above embodiment, the upper end of the adjustment bolt 70 is fixed to the lower surface of the lower end plate 54 , but the upper end of the adjustment bolt 70 may abut against the lower surface of the lower end plate 54 . [Explanation of symbols]

[0042] 10 Pillars (with level adjustment function) 12 Foundation pillar 12a Top surface 14 Recess 14a Bottom 16 Restraint bolt (horizontal restraint bolt) 30 Steel Support 34 Top plate 40 Gap 42 Nut (an example of another nut) 44 Nut 50 Upper Pillar 54 Bottom plate 56 Through hole 70 Adjustment bolt (level adjustment bolt)

Claims

1. A foundation pillar having an upwardly open recess formed therein; A steel support column supported on a bottom surface of the recess and provided with an upper end plate; An upper column disposed above the steel frame column and provided with a lower end plate; a plurality of level adjustment bolts whose upper ends are attached to the lower end plate and to which the upper end plate is attached using nuts threaded therein such that a gap is provided between the lower end plate and the upper end plate in which a jack can be placed; A column with level adjustment function.

2. A horizontal restraint bolt extending upward from the top surface of the foundation column; a protruding portion formed on the lower end plate, protruding horizontally relative to the upper column and having a through hole into which the horizontal restraint bolt is inserted; A pair of other nuts are screwed into the horizontal restraint bolt and sandwich the protruding portion from both sides across the through hole; and The column with level adjustment function according to claim 1 .

3. When viewed from above, the protruding portions are provided on both sides of the recessed portion. A column with level adjustment function according to claim 2.

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