JP2012229531A - Column base part of building and method of fixing column base part of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a column base part of a building, capable of minimizing a scale of a concrete foundation to which the column base part is to be fixed, and its fixing method.SOLUTION: A plate 20 is attached to a lower end of a column 10 of a building so as to cover an opening of the lower end, and an insertion column 30 having flexural capacity lower than the flexural capacity of the column 10 is projected on a lower surface of the plate 20. The insertion column 30 is inserted to a hole 50 opened on an upper surface of a concrete foundation 40, and grout 60 is filled. The grout 60 is filled to a height L below an opening of the hole 50 between an upper end connected to the plate 20 of the insertion column 30 and an intermediate point in the middle of reaching the lower end, and a part where a peripheral surface of the insertion column 30 is bendable without being directly supported by the grout 60 is provided between the height L and the plate 20.

Description

  The present invention is provided at the lower end of a pillar of a building, and is inserted into a hole opened above a concrete foundation and filled with a grout between the hole and fixed. More particularly, the present invention relates to a column base of a building that can minimize the scale of a foundation on which the column base is fixed, and a fixing method thereof.

  Pillars of buildings (including workpieces) are erected on concrete foundations that are placed in the ground or at low levels above the ground. The column base near the bottom of the column is fixed to the concrete foundation in various ways. Japanese Patent Laid-Open No. 2-190521 discloses a method for fixing a column base portion in which a steel column is built in a hole provided in a reinforced concrete foundation and filled with post-cast concrete. Japanese Patent Application Laid-Open No. 2008-2109 discloses a structure of a column base portion in which a protruding portion of an anchor bolt embedded in a foundation is inserted into an anchor bolt insertion hole of a base plate and tightened with a nut. In such a configuration, the horizontal and vertical sizes of the concrete foundation have to be very large and robust. If the scale of the concrete foundation is increased, more materials such as concrete and rebar must be used, and the construction period will be longer, which will increase the construction cost and build the concrete foundation on top of that. The floor height and width of the building itself that can do was excessively regulated.

JP-A-2-190521 JP 2008-2109 A

  Therefore, the objective of this invention is providing the column base part of a building which can suppress the scale of the concrete foundation to which a column base part is fixed to the minimum, and its fixing method.

  In order to achieve the above-mentioned object, the present invention is provided at the lower end of a pillar of a building, inserted into a hole opened above a concrete foundation, and filled with a grout between the holes and fixed. In the column base of the column, a plate attached to the lower end of the column so as to cover the opening of the lower end, and a bending strength which projects downward from the lower surface of the plate and which is smaller than the bending strength of the column The column base of the building was configured to include an insertion column having

  The present invention also relates to a column base for a building in which a column base provided at the lower end of a building column is inserted into a hole opened above a concrete foundation and filled with grout between the holes. In the fixing method of the part, a step of attaching a plate to the lower end of the column so as to cover the opening of the lower end, and an insertion column having a bending strength smaller than the bending strength of the column before and after the step, the plate Between the step of projecting downward from the lower surface of the substrate, the step of inserting the insertion column into the hole, and the middle point reaching the lower end from the upper end connected to the plate of the insertion column And a step of filling the grout by providing a portion where the peripheral surface of the insertion column can be bent without being directly supported by the grout.

  In the column base part of the building according to the present invention, the insertion column is connected to the building column via the plate, and the insertion column has a bending strength smaller than the bending strength of the building column. Therefore, when the concrete foundation rotates, the insertion column can absorb at least part of the bending stress. In order for the insertion column to absorb bending stress, the insertion column inserted into the hole has a grout between the upper end connected to the plate and the middle point on the way to the lower end. A part that can be bent without being directly supported is provided to fix the column base of the building.

  The portion of the insertion column that can be bent can be formed between the upper surface of the grout and the lower surface of the plate by filling the grout to a height below the lower surface of the plate. In addition, the part that can be bent of the insertion column is that the insertion column is provided with a cushioning material between the upper end connected to the plate and before the lower end, and the outer peripheral surface of the insertion column and the grout are in direct contact with each other. It can also be configured by filling the grout to a height that exceeds the lower end of the cushioning material, and insert the insertion column into the hole between the upper end connected to the plate and before the lower end. In this case, a flange having a size and a shape adjusted so as not to enter the hole can be provided around, and the grout can be filled up to a height below the lower surface of the flange.

  According to the configuration as described above, the proof strength of the structure of the conventional column base is based on the proof strength of the column erected on it, and is designed to have a so-called 100% proof stress that exceeds the proof strength of the column On the other hand, according to the column base part of a building and its fixing method according to the present invention, since the insertion column of the column base part absorbs at least a part of the bending stress, It is possible to freely design the deformation tolerances of different whole buildings, so that the size and robustness of the concrete foundation can be minimized.

  Furthermore, the present invention is provided at the lower end of a building column, inserted into a hole opened above a concrete foundation, and filled with a grout between the hole and fixed in a column base of the building. A plate attached to the lower end of the column so as to cover the opening of the lower end, and in any cross section from the lower surface of the plate to the lower side and connected to the plate from the upper end to the lower end The length of the longest major axis also included an insertion column shorter than the length of the largest major axis in the cross section of the column to constitute the column base of the building.

  Furthermore, the present invention relates to a building column in which a column base provided at the lower end of a building column is inserted into a hole opened above a concrete foundation, and grout is filled and fixed between the holes. In the fixing method of the legs, a step of attaching a plate to the lower end of the column so as to cover the opening of the lower end, and the maximum in any cross section from the upper end to the lower end connected to the plate before and after the above step A step of projecting an insertion column that is shorter than the length of the maximum major axis in the cross section of the column downward from the bottom surface of the plate, and a step of inserting the insertion column into the hole The method of fixing the column base of the building was constructed.

  In the column base part of the building according to the present invention, the insertion column is connected to the building column via a plate, and the insertion column is the maximum in any cross section from the upper end to the lower end connected to the plate. The length of the major axis is also shorter than the length of the largest major axis in the cross section of the building column. Therefore, the scale of the concrete foundation can be reduced at least in the horizontal direction.

As described above, according to the column base portion of a building and the fixing method thereof according to the present invention, the scale of the concrete foundation can be kept small, so that the material cost can be reduced and the construction period can be shortened to reduce the cost. be able to.

FIG. 1 is a front view showing a first embodiment of a column base of a building according to the present invention, in which a concrete foundation portion is represented by a cross section, and a lower portion of a concrete foundation portion and an upper portion of a column are omitted. It is shown. FIG. 2 is a plan view showing the column base portion of the building of FIG. FIG. 3 is a view similar to FIG. 1 showing a second embodiment of the column base portion of the building according to the present invention. FIG. 4 is a view similar to FIG. 1 showing the third embodiment of the column base portion of the building according to the present invention. FIG. 5 is a view similar to FIG. 1 showing a fourth embodiment of a column base portion of a building according to the present invention.

  Hereinafter, the best mode of a column base part of a building concerning the present invention and its fixing method is explained in detail, referring to drawings. The following description is for the purpose of understanding the invention more deeply and is not intended to limit the scope of the claims.

[First Embodiment]
1 and 2 show a first embodiment of a column base part of a building according to the present invention. In each figure, the upper surface of the plate 20 is attached to the lower end of the column 10, and the insertion column 30 protrudes from the lower surface of the plate 20. The concrete foundation 40 is provided with a hole 50 opened on the upper surface, and a grout 60 is filled between the hole 50 and the insertion column 30.

  The column 10 is a steel pipe column and is a column on the first floor of a building. An iron plate 20 is welded and attached so as to cover the opening at the lower end of the column 10. The plate 20 has a diameter that is slightly larger than the outer diameter of the column 10 and has a circular shape with flat sides, so that the column 10 can be easily and sufficiently welded. The plate 20 is welded so that the upper surface thereof is orthogonal to the central axis of the column 10 and the central axis of the column 10 matches. The insertion column 30 welded to the lower surface of the plate 20 is made of a steel pipe having a diameter smaller than that of the column 10 and a small thickness. The insertion column 30 protrudes downward from the lower surface of the plate 20 so that the central axis in the longitudinal direction is orthogonal to the lower surface of the plate 20. A steel plate lid 32 is welded and closed to the lower end opening of the insertion column 30.

  In another embodiment, the column is a steel pipe prism, and the plate is a square that is slightly larger than the shape of the cross section of the prism. The shape of the plate may be a ring with a hole in the center. In this case, after welding the plate to the insertion column, before the column is welded, grout material is inserted from the plate hole into the hollow insertion column. It may be filled. In addition, the number and shape of the insertion columns are not limited to the embodiment described here, and it is sufficient if the columns are configured to have a bending strength smaller than the bending strength of the columns. Does not matter. As the insertion column, for example, a prism or a square pipe can be used, or a combination of two angles in a box shape may be used.

  The column 10 having the column base as described above is fixed by inserting the insertion column 30 into the hole 50 provided in the concrete foundation 40 and filling the grout 60. The concrete foundation 40 is constructed by first placing a concrete in the lower stage, placing a steel pipe for hole 52 for forming a hole 50 thereon, and placing the concrete in the upper stage. The holed steel pipe 52 has an upper surface opened, and the lower surface opening is closed by welding a circular bottom plate 54 made of iron. A hole through which the bolt 56 is inserted is formed at the center of the bottom plate 54, and a nut 58 is welded to the bottom surface of the bottom plate 54 at a position corresponding to the hole, and the bolt 56 is screwed into the nut 58. It is supposed to be.

  In other embodiments, the concrete foundation does not have a top and bottom configuration, and may not have a step. In addition, the upper and lower foundations may be placed simultaneously after positioning the steel pipe 52 for holes. Further, as the means for forming the hole, it is sufficient if it can be removed from the box, such as a void form. The shape of the hole is not limited to a cylindrical shape, and may be, for example, a rectangular tube shape.

  Next, the process of fixing the column 10 to the concrete foundation 40 will be described.

  The work of attaching the column base to the column 10 is performed in the factory, and the column 10 to which the column base is attached is transported to the construction site and is erected on the concrete foundation 40. In the factory, the lid 32 is welded to the lower end of the insertion column 30, the lower surface of the plate 20 is welded to the upper end of the insertion column 30, and the upper surface of the plate 20 is welded to the column 10.

  As described above, the concrete foundation 40 is placed at the construction site. That is, after the lower concrete is cast, the hole steel pipe 52 is placed and the upper concrete is cast. The pillar 10 transported to the building site is suspended by a crane and inserted into the hole 50. Fine adjustment of the vertical position of the column 10 is performed by turning the bolt 56. That is, if the bolt 56 is turned in the screwing direction, the pillar 10 is lowered, and if the bolt 56 is turned in the opposite direction, the pillar 10 is placed at the raised position. Fine adjustment of the horizontal position and inclination of the column 10 is performed by the wedges 70 and 72. Position and inclination are adjusted by inserting wedges 70 and 72 between the concrete foundation 40 and the plate 20. Although not shown in the figure, a plurality of wedges, for example, wedges 70 and 72 may be driven at an upper and lower positions as viewed in FIG.

  When the positioning is completed, the grout 60 is filled in the gap between the insertion column 30 and the hole 50. As shown in FIG. 1, the grout 60 is filled only to a height L below the upper end connected to the plate 20 of the insertion post 30 and below the opening of the hole 50, The insertion column 30 is not supported by the grout 60 over the entire length from the lower end to the upper end. As a result, in the insertion column 30, a portion where the peripheral surface can be bent without being supported by the grout 60 is generated between the upper end connected to the lower surface of the plate 20 and the height L. The height at which the grout 60 is filled can be determined according to the tolerance of deformation of the building. In the present embodiment, the length of the insertion column 30 is longer than the depth of the hole 50, and even if the lower end of the insertion column 30 is inserted into contact with the bottom of the hole 50, the plate 20 remains in the hole 50. Therefore, even if the opening of the hole 50 is filled with the grout 60, a portion of the insertion post 30 that is not supported by the grout 60 is always secured.

  Next, the operation of this embodiment will be described.

  In the column base portion of the building according to the present embodiment, the insertion column 30 has a bending strength smaller than the bending strength of the column 10, and the peripheral surface of the insertion column 30 is supported on the insertion column 30 by a grout. Since the part which can be bent is provided, when the concrete foundation 40 rotates at the time of an earthquake, the insertion pillar 30 will absorb bending stress preferentially to the pillar 10.

  Therefore, according to the column base portion of the building and the fixing method thereof according to the present embodiment, it is possible to freely design the allowable value of the deformation of the entire building, which differs depending on each building. Therefore, the scale and robustness of the concrete foundation can be suppressed to the necessary minimum, thereby reducing the cost by reducing the material cost and the construction period.

  Specifically, for example, the foundation beam 80 is connected to the concrete foundation 40 of FIG. 2, but the width of the left and right of the structure for fixing the column base is almost the same as the width of the column 10. The horizontal haunch provided at this location is not necessary, and the rebar 82 does not need to be bent so as to match the horizontal haunch, and can remain straight. Therefore, the foundation scale is reduced, and the foundation work is technically easy and takes a short time. Similarly, compared with the conventional construction method using an anchor bolt etc., it can narrow between the height of the floor of a building and the upper surface of a concrete foundation, and it is not necessary to bury the foundation deeply in the ground.

[Second Embodiment]
In FIG. 3, 2nd Embodiment of the column base part of the building which concerns on this invention is shown.

  A plate 120 having a slightly larger diameter than that of the first embodiment is attached to the column 110, and an insertion column 130 shorter than that of the first embodiment is connected to the column 110. The material, diameter size, and thickness of the column 110 and the insertion column 130 are the same as those in the first embodiment. A cushioning material 131 made of a foamed resin sheet is provided around the upper peripheral surface of the insertion column 130 between the upper end connected to the plate 120 and the front end of the lower end. The lower end opening of the insertion post 130 is closed by a lid 132. The hole 150 formed in the upper surface of the foundation concrete 140 is formed by placing the steel pipe 152 for hole upright and then placing the concrete. A bottom plate 154 is welded to the lower end of the hole steel pipe 152 to constitute the bottom surface of the hole 150. The hole 150 is formed at the center of the shallow groove 151 on the upper surface of the foundation concrete 140. The shallow groove 151 has a cylindrical shape having a diameter slightly longer than the outer diameter of the plate 120 and has a depth substantially equal to the height of the plate 120. Therefore, the plate 120 can be moved in the horizontal direction in the shallow groove 151 after the insertion column 130 is lowered to a position where the plate 120 abuts against the bottom of the shallow groove 151. Can be finely adjusted. After positioning, the grout 160 is filled until it fills all the holes 150 and reaches the lower surface of the plate 120.

  In other embodiments, the cushioning material is made of nonwoven fabric or corrugated paper. The cushioning material is preferably made of a material having a certain degree of elasticity in order to prevent the grout 160 from coming into direct contact with the peripheral surface of the insertion column 130 and to resist pressure generated in the surface direction.

  In the pillar of the building according to the second embodiment, the cushioning material 131 provided around the insertion column 130 is bent so that the grout 160 is not directly supported by the peripheral surface of the insertion column 130 and supported. This produces a part that can Therefore, the same operation and effect as the first embodiment are obtained. Moreover, the magnitude | size of bending strength according to the allowable value of a deformation | transformation of a building can be determined by adjusting the length which surrounds the shock absorbing material 131. FIG.

[Third Embodiment]
In FIG. 4, 3rd Embodiment of the column base part of the building which concerns on this invention is shown.

  The plate 220 attached to the column 210 and the insertion column 230 connected to the plate 220 are the same as those in the first embodiment. The material, diameter, and thickness of the pillar 210 and the insertion pillar 230 are the same as those in the first embodiment. A flange 233 is provided around the insertion post 230 between the upper end connected to the plate 220 and the front of the lower end. The flange 233 is a steel ring shape having the same thickness and outer diameter as the plate 120 in the second embodiment, and the inner diameter is such that the outer diameter of the insertion column 230 can be welded to the peripheral surface of the insertion column 230. Is almost equal to A lower end opening of the insertion post 230 is closed by a lid 232. The structure of the hole 250, the shallow groove 251, the hole steel pipe 252 and the bottom plate 254 formed in the upper surface of the foundation concrete 240 is the same structure as a member having the same function in the corresponding second embodiment. When the insertion column 230 is lowered, the outer diameter of the flange 233 is smaller than the inner diameter of the shallow groove 251, but is larger than the inner diameter of the hole 250, so that the flange 233 fits into the shallow groove 251 and covers the hole 250. Stop in state. Since the flange 233 can move in the horizontal direction in the shallow groove 251, the horizontal position of the column 210 can be finely adjusted. The grout 260 is filled in the gap between the insertion column 230 and the hole 250 until it reaches the lower surface of the flange 233.

  In such a building column according to the third embodiment, a portion of the insertion column 230 that is not supported by the grout 260 is formed between the lower surface of the plate 220 and the upper surface of the flange 233. Therefore, the same operation and effect as the first embodiment can be obtained. Further, the bending strength of the insertion column 230 can be adjusted by moving the position of the flange 233 up and down.

[Fourth Embodiment]
FIG. 5 shows a fourth embodiment of a building column base according to the present invention, and members having the same symbols as those in FIG. 1 have the same functions as those in the first embodiment.

  In FIG. 5, the upper surface of the plate 320 is attached to the lower end of the column 310, and the insertion column 330 is projected from the lower surface of the plate 320. The column 310 is a steel pipe column, and an iron plate 320 is welded and attached so as to cover the opening at the lower end of the column 310. The plate 320 has a diameter that is slightly larger than the outer diameter of the column 310, and has a flat circular shape on both sides. The column 310 can be easily and sufficiently welded. The insertion column 330 welded to the lower surface of the plate 320 is made of steel pipe and has a diameter smaller than that of the column 310, but has a bending strength substantially equal to the bending strength of the column 310 because it is thicker. A steel plate lid 332 is welded and closed to the lower end opening of the insertion column 330.

  Such an insertion column 330 is inserted and fixed in the hole 50 formed in the concrete foundation 40 by substantially the same process as in the first embodiment, but the grout 60 is filled until the hole 50 is completely filled. The

  According to the fourth embodiment, the insertion column 330 is smaller in diameter than the column 310, that is, the maximum major axis length in any cross section from the upper end to the lower end connected to the plate 320 is equal to the cross section of the column 310. Shorter than the length of the largest major axis in Therefore, as shown in FIG. 2, at least the size of the concrete foundation 40 in the horizontal direction can be reduced.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it is needless to say that modifications can be appropriately made within the scope of the gist of the present invention.

10 ... pillar 20 ... plate 30 ... insertion pillar 40 ... concrete foundation 50 ... hole 60 ... grout

  In order to achieve the above-mentioned object, the present invention is provided at the lower end of a pillar of a building, inserted into a hole opened above a concrete foundation, and filled with a grout between the holes and fixed. In the column base of the column, a plate attached to the lower end of the column so as to cover the opening of the lower end, and a bending strength which projects downward from the lower surface of the plate and which is smaller than the bending strength of the column The insertion column includes a cushioning material that prevents the outer peripheral surface of the insertion column from directly contacting the grout between the upper end connected to the plate and the lower end. The column base of the building was constructed as it was installed.

  The present invention also relates to a column base for a building in which a column base provided at the lower end of a building column is inserted into a hole opened above a concrete foundation and filled with grout between the holes. In the fixing method of a part, the fixing method of the column base part of a building was comprised including the process of inserting the said insertion pillar in the said hole, and the process of filling grout to the height exceeding the lower end of the said buffer material.

  The part of the insertion column that can be bent is that the insertion column is provided with a cushioning material between the upper end connected to the plate and before the lower end, so that the outer peripheral surface of the insertion column and the grout are in direct contact with each other. It can be configured by filling the grout to a height that exceeds the lower end of the cushioning material in such a way as to interfere.

FIG. 1 is a front view showing an embodiment of a column base part of a building according to the present invention, in which a concrete foundation part is represented by a cross section, and a lower part of a concrete foundation part and an upper part of a pillar are omitted. . FIG. 2 is a plan view showing the column base portion of the building of FIG.

  1 and 2 show an embodiment of a column base of a building according to the present invention. In each figure, the upper surface of the plate 20 is attached to the lower end of the column 10, and the insertion column 30 protrudes from the lower surface of the plate 20. The concrete foundation 40 is provided with a hole 50 opened on the upper surface, and a grout 60 is filled between the hole 50 and the insertion column 30.

  The column 10 is a steel pipe column and is a column on the first floor of a building. An iron plate 20 is welded and attached so as to cover the opening at the lower end of the column 10. The plate 20 has a diameter that is slightly larger than the outer diameter of the column 10 and has a circular shape with flat sides, so that the column 10 can be easily and sufficiently welded. The plate 20 is welded so that the upper surface thereof is orthogonal to the central axis of the column 10 and the central axis of the column 10 matches. The insertion column 30 welded to the lower surface of the plate 20 is made of a steel pipe having a diameter smaller than that of the column 10 and a small thickness. The insertion column 30 protrudes downward from the lower surface of the plate 20 so that the central axis in the longitudinal direction is orthogonal to the lower surface of the plate 20. A steel plate lid 32 is welded and closed to the lower end opening of the insertion column 30. A cushioning material 31 made of a foamed resin sheet is provided around the upper peripheral surface of the insertion column 30 between the upper end connected to the plate 20 and the front of the lower end. The hole 50 formed in the upper surface of the foundation concrete 40 is formed by placing the steel pipe for hole 52 and then placing the concrete. A bottom plate 54 is welded to the lower end of the hole steel pipe 52 to constitute the bottom surface of the hole 50. The hole 50 is formed in the center of the shallow groove 51 on the upper surface of the foundation concrete 40. The shallow groove 51 has a cylindrical shape having a diameter slightly longer than the outer diameter of the plate 20, and has a depth substantially the same as the height of the plate 20.

  In another embodiment, the column is a steel pipe prism, and the plate is a square that is slightly larger than the shape of the cross section of the prism. In addition, the shape of the plate may be a ring with a hole in the center. It may be filled. In addition, the number and shape of the insertion columns are not limited to the embodiment described here, and it is sufficient if the columns are configured to have a bending strength smaller than the bending strength of the columns. Does not matter. As the insertion column, for example, a prism or a square pipe can be used, or a combination of two angles in a box shape may be used. In another embodiment, the cushioning material is made of nonwoven fabric or corrugated paper. The cushioning material is preferably made of a material having a certain degree of elasticity in order to prevent the grout 60 from coming into direct contact with the peripheral surface of the insertion column 30 and to resist pressure generated in the surface direction.

  The column 10 having the column base as described above is fixed by inserting the insertion column 30 into the hole 50 provided in the concrete foundation 40 and filling the grout 60. The concrete foundation 40 is constructed by first placing a concrete in the lower stage, placing a steel pipe for hole 52 for forming a hole 50 thereon, and placing the concrete in the upper stage.

  As described above, the concrete foundation 40 is placed at the construction site. That is, after the lower concrete is cast, the hole steel pipe 52 is placed and the upper concrete is cast. The pillar 10 transported to the building site is suspended by a crane and inserted into the hole 50. The shallow groove 51 has a cylindrical shape having a diameter slightly longer than the outer diameter of the plate 20, and has a depth substantially the same as the height of the plate 20. Therefore, after the insertion column 30 is lowered to a position where the plate 20 contacts the bottom of the shallow groove 51, the plate 20 can be moved in the horizontal direction in the shallow groove 51, and thereby the horizontal position of the column 10. Can be finely adjusted. After positioning, the grout 60 is filled until it fills all the holes 50 and reaches the lower surface of the plate 20.

  In the building pillar according to the present embodiment, the cushioning material 31 provided around the insertion column 30 can be bent without the grout 60 being directly supported by the peripheral surface of the insertion column 30. Produce part. Moreover, the magnitude | size of bending strength according to the allowable value of a deformation | transformation of a building can be determined by adjusting the length which surrounds the shock absorbing material 31. FIG.

  In the column base portion of the building according to the present embodiment, the insertion column 30 has a bending strength smaller than the bending strength of the column 10, and the insertion column 30 has a cushioning material 31 provided around the insertion column 30. Thus, since the grout 60 directly touches the peripheral surface of the insertion column 30 and is not supported by the grout 60, a bendable portion is provided. Therefore, when the concrete foundation 40 rotates during an earthquake, the insertion column 30 is The bending stress is absorbed in preference to the column 10.

Claims (11)

In the column base of the building, which is provided at the lower end of the building pillar, inserted into the hole opened above the concrete foundation, and filled with grout between the hole and fixed,
A plate attached to the lower end of the column so as to cover the opening of the lower end;
A column base for a building, comprising: an insertion column protruding downward from a lower surface of the plate and having a bending strength smaller than the bending strength of the column.   The cushioning material which prevents that the outer peripheral surface of the said insertion column and grout contact | connect directly between the upper end connected to the said plate and the front of a lower end is provided around the said insertion column. Column base of the building.   The insertion column has been adjusted in size and shape so that it does not enter the hole when the insertion column is inserted into the hole between the upper end connected to the plate and before the lower end. The column base of a building according to claim 1, wherein a flange is provided around. In the column base of the building, which is provided at the lower end of the building pillar, inserted into the hole opened above the concrete foundation, and filled with grout between the hole and fixed,
A plate attached to the lower end of the column so as to cover the opening of the lower end;
The maximum major axis length in any cross section from the upper end to the lower end connected to the plate that protrudes downward from the lower surface of the plate is greater than the maximum major axis length in the cross section of the column. The column base of the building, which also includes a short insertion column.   The column base portion of the building according to claim 4, wherein the insertion column has a bending strength substantially equal to a bending strength of the column. In the fixing method of the column base of the building, the column base provided at the lower end of the column of the building is inserted into a hole opened above the concrete foundation and filled with grout between the holes. ,
Attaching a plate to the lower end of the column so as to cover the opening of the lower end;
Before and after the above step, a step of projecting an insertion column having a bending strength smaller than the bending strength of the column from the lower surface of the plate downward,
Inserting the insertion post into the hole;
Between the upper end of the insertion column connected to the plate and the intermediate point on the way to the lower end, a grout is provided by providing a portion that can bend without the peripheral surface of the insertion column being directly supported by the grout. And a method for fixing a column base of a building. In the fixing method of the column base of the building, the column base provided at the lower end of the column of the building is inserted into a hole opened above the concrete foundation and filled with grout between the holes. ,
Inserting the insertion column of the column base of the building according to any one of claims 1 to 3 into the hole;
Between the upper end of the insertion column connected to the plate and the intermediate point on the way to the lower end, a grout is provided by providing a portion that can bend without the peripheral surface of the insertion column being directly supported by the grout. And a method for fixing a column base of a building. Inserting the insertion column of the column base of the building according to claim 1 into the hole;
The method for fixing a column base of a building according to claim 5, further comprising a step of filling grout to a height below the lower surface of the plate. Inserting the insertion column of the column base of the building according to claim 2 into the hole;
The method for fixing a column base of a building according to claim 5, further comprising a step of filling grout to a height exceeding a lower end of the cushioning material. Inserting the insertion column of the column base of the building according to claim 3 into the hole;
The method for fixing a column base of a building according to claim 5, further comprising a step of filling grout to a height below the lower surface of the flange. In the fixing method of the column base of the building, the column base provided at the lower end of the column of the building is inserted into a hole opened above the concrete foundation and filled with grout between the holes. ,
Attaching a plate to the lower end of the column so as to cover the opening of the lower end;
Before and after the above step, the maximum length of the major axis in any cross section from the upper end to the lower end connected to the plate is shorter than the length of the largest major axis in the cross section of the column. Projecting downward from the lower surface of the
And a step of inserting the insertion column into the hole.