Column construction methods

Abstract

The objective is to restrict the rotation of the column around the connecting pin while easily positioning the column on the structural member. [Solution] The column construction method comprises: a column base fixing jig installation step in which a C-shaped column base fixing jig is installed on the upper surface of a structural member in a plan view; a column installation step in which the column base portion of the column is fitted inside the column base fixing jig and a connecting pin protruding from the lower end surface of the column is inserted into an insertion hole formed on the upper surface of the structural member; and a filling step in which, with the column base portion of the column fitted inside the column base fixing jig, a filler material is filled into the insertion hole.

Description

Technical Field

[0001] The present invention relates to a method for constructing columns.

Background Art

[0002] There is known a wooden column support fitting including a rectangular bottom plate disposed on a corner of a foundation, a first side plate and a second side plate vertically standing from one side of the bottom plate and disposed along a side surface of a through column, and a stop plate horizontally extending from the first side plate and the second side plate, respectively (see, for example, Patent Document 1).

[0003] Also, there is known a method for installing a wooden column in which a rigid convex portion protruding from an upper surface of a first foundation concrete is fitted into a concave portion formed on a lower end surface of the wooden column and joined (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, it is conceivable to join a structural member and a column through a joining pin by filling a filler such as grout in a state where the joining pin protruding from the lower end surface of the column is inserted into an insertion hole formed on an upper surface of a structural member such as a beam.

[0006] In this case, when positioning the column with respect to the structural member, the column rotates around the joining pin, so it takes time to position the column with respect to the structural member.

[0007] Furthermore, until the filler material in the insertion holes of the structural members hardens, the columns are prone to rotating around the connecting pins, which could cause the columns to shift position relative to the structural members.

[0008] Taking the above facts into consideration, the present invention aims to easily position a column on a structural member while restricting the rotation of the column around the connecting pin. [Means for solving the problem]

[0009] The column construction method described in claim 1 comprises: a column base fixing jig installation step of installing a C-shaped column base fixing jig on the upper surface of a structural member in plan view; a column installation step of fitting the column base portion of the column into the inside of the column base fixing jig and inserting a connecting pin protruding from the lower end surface of the column into an insertion hole formed on the upper surface of the structural member; and a filling step of filling the insertion hole with a filler material while the column base portion of the column is fitted into the inside of the column base fixing jig.

[0010] According to the column construction method of claim 1, in the column base fixing jig installation step, a column base fixing jig that is C-shaped in plan view is installed on the upper surface of the structural member.

[0011] Next, in the column installation process, the base portion of the column is fitted inside the column base fixing jig, and the connecting pins protruding from the lower end surface of the column are inserted into the insertion holes formed on the upper surface of the structural member.

[0012] By fitting the base of the column into the inside of the column base fixing jig in this way, the base of the column can be easily positioned relative to the structural member. Furthermore, the column base fixing jig can restrict the rotation of the column around the connecting pin.

[0013] Next, in the filling process, the column base is fitted inside the column base fixing jig, and the filler material is filled into the insertion hole. As this filler material hardens, the column base is joined to the structural member via the connecting pin. In addition, by fitting the column base inside the column base fixing jig, displacement of the column relative to the structural member is suppressed while the filler material hardens.

[0014] Thus, in this invention, the rotation of the column around the connecting pin is restricted, while the column can be easily positioned on the structural member.

[0015] The column construction method according to claim 2 is the column construction method according to claim 1, wherein a wall is joined to the column, and the column base fixing jig is arranged along the column shape of the column that protrudes from the wall surface of the wall.

[0016] According to the column construction method of claim 2, a wall is joined to the column. A column base fixing jig is positioned along the column shape of the column that protrudes from the wall surface of the wall. This prevents the column base fixing jig from interfering with the wall during construction, for example. Therefore, the constructability of the wall is improved.

[0017] The column construction method described in claim 3 is the column construction method described in claim 1 or claim 2, wherein the column is a wooden column and the structural member is a concrete structural member.

[0018] According to the column construction method of claim 3, the column is made of wood, and the structural member is made of concrete. Here, since the wooden column is lighter than the concrete structural member, it is easier to rotate around the connecting pin.

[0019] In such cases, the present invention is particularly effective, as the column base can be fitted inside the column base fixing jig, thereby restricting the rotation of the column around the connecting pin while easily positioning the column to the structural member. [Effects of the Invention]

[0020] As described above, according to the present invention, the column can be easily positioned on a structural member while restricting the rotation of the column around the connecting pin. [Brief explanation of the drawing]

[0021] [Figure 1] This is a longitudinal cross-sectional view showing a column constructed by a column construction method according to one embodiment of the present invention. [Figure 2] It is a sectional view taken along line 2-2 of FIG. 1. [Figure 3] It is a plan view showing the lower precast beam shown in FIG. 1. [Figure 4] It is a plan view of a lower precast beam showing the construction process of a column construction method according to an embodiment. [Figure 5] It is a plan view of a lower precast beam showing the construction process of a column construction method according to an embodiment. [Figure 6] It is a longitudinal sectional view of a column and a lower precast beam showing the construction process of a column construction method according to an embodiment. [Figure 7] It is a longitudinal sectional view of a column and a lower precast beam showing the construction process of a column construction method according to an embodiment. [Figure 8] It is a perspective view of a column and a lower precast beam showing the construction process of a column construction method according to an embodiment.

MODE FOR CARRYING OUT THE INVENTION

[0022] Hereinafter, an embodiment will be described with reference to the drawings.

[0023] (Column) In FIG. 1, a column 30 constructed by the column construction method according to the present embodiment is shown. The column (column member) 30 is, for example, a wooden column (wooden column). This column 30 is formed in a prismatic shape and has four side surfaces 30S. Note that the lower precast beam 70 is an example of a concrete member.

[0024] (Fireproof board) A fireproof board 36 is attached to each side surface 30S of the column 30. The fireproof board 36 is, for example, a gypsum board or a calcium silicate board, etc., and is attached to each side surface 30S of the column 30 by an adhesive or screws, etc.

[0025] The fire-resistant boards 36 are attached to each side surface 30S of the column 30 in a state where they are laminated in multiple layers (three layers in this embodiment). The column 30 is fire-resistant covered by these fire-resistant boards 36. The fire-resistant boards 36 can be attached to the column 30 as needed and can be omitted as appropriate.

[0026] (Connecting pin) A connecting pin 40 is provided at the lower end (base) of the column 30 to connect with the lower precast beam 70. Specifically, a mounting hole 32 is formed in the center of both end faces of the column 30 into which one end (upper end) of the connecting pin 40 is inserted. The mounting hole 32 is a circular, bottomed hole. In addition, a cover plate 46 is provided on the lower end face of the column 30.

[0027] The cover plate (sealing plate) 46 is made of steel plate or the like. This cover plate 46 is superimposed on the lower end surface of the column 30 and covers the entire lower end surface.

[0028] A through hole is formed in the center of the cover plate 46, leading to the mounting hole 32. One end of the connecting pin 40 is inserted through this through hole in the cover plate 46 into the mounting hole 32 formed in the end face of the column 30.

[0029] The cover plate 46 may be provided as needed and can be omitted as appropriate.

[0030] The connecting pin 40 is formed in a rod shape, for example, from a round steel bar. A pair of pin holes 42 are formed at one end of the connecting pin 40. The pair of pin holes 42 are circular through holes that penetrate the connecting pin 40 in the width direction (radial direction).

[0031] Furthermore, as shown in Figure 2, the pair of pin holes 42 intersect (are perpendicular to) each other when viewed from the axial direction of the connecting pin 40, and are offset in the axial direction of the connecting pin 40. A pair of fixing pins 44 are inserted into this pair of pin holes 42. Note that the column base fixing jig 80 is not shown in Figure 2.

[0032] The pair of fixing pins 44 are formed from rod-shaped members such as drift pins. The pair of fixing pins 44 are inserted into a pair of pin holes 42 formed in the connecting pin 40, and also into a pair of pin holes 34 formed in the side surface 30S of the column 30.

[0033] The pair of pin holes 34 are circular through-holes that penetrate the column 30 and the mounting hole 32 in the width direction. In plan view, the pair of pin holes 34 intersect (are perpendicular to each other) and are offset in the direction of the column 30's material axis. The connecting pin 40 is fixed to the column 30 by inserting the fixing pin 44 into the mutually connecting pin holes 34 and 42.

[0034] The pair of fixing pins 44 are covered by the fire-resistant board 36. Furthermore, the connecting pins 40 are not limited to the pair of fixing pins 44; they may also be fixed to the column 30 by other fixing methods, such as adhesive.

[0035] The other end of the connecting pin 40 protrudes from the cover plate 46 that covers the lower end surface of the column 30. A male thread is also formed on the other end of the connecting pin 40. This other end of the connecting pin 40 is inserted into the insertion hole 74 of the lower precast beam 70, which will be described later.

[0036] The male thread on the other end of the connecting pin 40 may be provided as needed, but can be omitted as appropriate.

[0037] (Lower precast beam) As shown in Figure 1, the lower end (column base) of the column 30 is connected to the lower precast beam 70 via a connecting pin 40 (pin connection). The lower precast beam 70 is made of precast concrete and is manufactured, for example, in a factory or site yard. The lower precast beam 70 is made of reinforced concrete and has multiple main beam reinforcements 76 and shear reinforcements 78 embedded inside.

[0038] The lower precast beam 70 is a through beam. This lower precast beam 70 has a joint portion 72 that connects to the column 30 and a beam portion 73 (see Figure 4) that extends from the joint portion 72. An insertion hole 74 is formed in the center of the upper surface of the joint portion 72.

[0039] The insertion hole 74 is a circular, bottomed hole. The insertion hole 74 is formed, for example, by embedding a sleeve in the joint portion 72. With the other end (lower end) of the connecting pin 40 inserted into this insertion hole 74, a filler material (cement-based filler) M such as mortar or grout is filled in.

[0040] Multiple leveling bolts 60 are provided around the insertion hole 74 on the upper surface of the joint portion 72. The multiple leveling bolts 60 protrude from the upper surface of the joint portion 72. By placing the lower end surface of the column 30 on these leveling bolts 60 via a cover plate 46, a joint 62 is formed between the upper surface of the joint portion 72 and the lower end surface of the column 30 (cover plate 46). This joint 62 is filled with a filler material M.

[0041] Furthermore, the joint portion 72 of the lower precast beam 70 may be joined to, for example, a column from the lower floor.

[0042] (filling groove) A filling groove 75 is formed on the upper surface of the joint portion 72. The filling groove 75 is formed in a rectangular cross-section and opens onto the upper surface of the joint portion 72. The width of this filling groove 75 is narrower than the diameter of the insertion hole 74. Furthermore, the depth of the filling groove 75 is set so that it does not reach the upper end of the shear reinforcement bar 78 when viewed in cross-section of the lower precast beam 70.

[0043] As shown in Figure 3, the filling groove 75 extends from the insertion hole 74 and reaches the side surface 70S of the lower precast beam 70. In plan view, the filling groove 75 is positioned approximately perpendicular to the side surface 70S of the lower precast beam 70, connecting the insertion hole 74 and the side surface 70S of the lower precast beam 70 by the shortest distance.

[0044] Furthermore, the filling groove 75 reaches the outer surface of the column 30, i.e., the outer surface 36S of the fire-resistant board 36, in a plan view. In this embodiment, the outer surface 36S of the column 30 and the side surface 70S of the lower precast beam 70 are substantially flush. Also, if there is no fire-resistant board 36, the side surface 30S of the column 30 becomes the outer surface of the column 30.

[0045] (Column construction method) Next, an example of a column construction method according to this embodiment will be described.

[0046] As shown in Figures 4 and 5, in this embodiment, the column base of the column 30 is positioned relative to the lower precast beam 70 using the column base fixing jig 80, and then the column base of the column 30 is joined to the lower precast beam 70.

[0047] (Installation process of fixing the column base jig) Specifically, first, in the column base fixing jig installation process, the column base fixing jig 80 is installed on the upper surface of the joint portion 72 of the lower precast beam 70. Here, as shown by the dashed lines in Figures 4 and 5, after the column 30 is installed, walls 50 are joined to both sides of the column 30. The column base fixing jig 80 is positioned along the column shape of the column 30 that protrudes from the wall surface of the wall 50.

[0048] As shown in Figures 4, 5, and 8, the column base fixing jig 80 is formed in a C-shape along the three sides of the column base of the column 30 in a plan view. This column base fixing jig 80 has a pair of side frames 82 that face each other and a cross frame 84 that connects one end of the pair of side frames 82.

[0049] The pair of side frames 82 are formed, for example, from L-shaped steel and are arranged along the beam width direction of the lower precast beam 70. The pair of side frames 82 are also arranged facing each other in the material axis direction of the lower precast beam 70, with the column base of the column 30 in between.

[0050] Each side frame 82 has a base portion 82A and a guide portion 82B. The base portion 82A is formed in a flat plate shape and is fixed to the upper surface of the joint portion 72 of the lower precast beam 70 by bolts 86 while being superimposed on the upper surface. The guide portion 82B is provided at the side end of the base portion 82A on the column 30 side.

[0051] The side frame 82 may be fixed to the lower precast beam 70 not only by bolts 86, but also by pins, anchors, or the like.

[0052] The guide portion 82B is formed in a wall shape and is provided along the side end of the base portion 82A on the column 30 side, and extends upward from that side end. The guide portions 82B of the pair of side frames 82 are arranged facing each other in the direction of the material axis of the lower precast beam 70. The opposing surfaces of this pair of guide portions 82B are positioning surfaces (guide surfaces) 82B1 (see Figure 5) that position the column base of the column 30 in the direction of the material axis of the lower precast beam 70.

[0053] In a plan view, one end of each pair of side frames 82 protrudes from the side surface 70S of the lower precast beam 70. The ends of these pair of side frames 82 are connected by a cross frame 84.

[0054] The cross frame 84 is formed, for example, from L-shaped steel and is positioned along the material axis of the lower precast beam 70. The cross frame 84 is also positioned along the outer surface 36S of the column base of the column 30, and both ends are joined to one end of the side frame 82 by welding or the like.

[0055] The cross frame 84 has a base portion 84A and a guide portion 84B. The base portion 84A is formed in a flat plate shape and is arranged substantially horizontally. The guide portion 84B is provided at the side end of the base portion 84A on the column 30 side.

[0056] The guide section 84B is formed in a wall shape and is provided along the side end of the base section 84A on the column 30 side, and extends upward from that side end. The column 30 side surface of this pair of guide sections 84B is a positioning surface (guide surface) 84B1 (see Figure 5) that positions the column base of the column 30 in the beam width direction of the lower precast beam 70.

[0057] In this embodiment, the side frames 82 of the column base fixing jig 80 are fixed to the lower precast beam 70, but the cross frame 84 may also be fixed to the lower precast beam 70. Furthermore, the pair of side frames 82 and the cross frame 84 are not limited to L-shaped steel, but may be formed from, for example, C-shaped steel. In addition, the configuration of the column base fixing jig 80 can be changed as appropriate.

[0058] (Pillar installation process) Next, as shown in Figures 6 and 7, in the column installation process, the column base portion of the column 30 is fitted inside the column base fixing jig 80, and the connecting pin 40 protruding from the lower end surface of the column 30 is inserted into the insertion hole 74 formed on the upper surface of the lower precast beam 70.

[0059] Specifically, the column 30 is lifted using a lifting machine (not shown), and the lower end surface of the column 30 is placed on top of multiple leveling bolts 60 via a cover plate 46.

[0060] At this time, the connecting pin 40 protruding from the lower end surface (cover plate 46) of the column 30 is inserted into the insertion hole 74. In addition, if necessary, the amount of protrusion of the multiple level adjustment bolts 60 protruding from the upper surface of the joint portion 72 is increased or decreased to adjust the level of the column 30.

[0061] The connecting pin 40 is fixed to the lower end of the column 30 by a pair of fixing pins 44 before the column 30 is installed. In this embodiment, the fire-resistant board 36 is pre-attached to the column 30 before it is installed.

[0062] (filling process) Next, as shown in Figure 1, in the filling process, with the column base of the column 30 fitted inside the column base fixing jig 80, the filling material M is filled into the insertion hole 74.

[0063] Specifically, the outer periphery of the joint 62 between the upper surface of the joint portion 72 of the lower precast beam 70 and the lower end surface of the column 30 is sealed with formwork (not shown). In this state, the filler material M is filled into the insertion hole 74 through the filling groove 75 from the gap between the outer surface 36S of the column 30 and the side surface 70S of the lower precast beam 70, and the filler material M is also filled into the joint 62 between the upper surface of the joint portion 72 and the lower end surface of the column 30.

[0064] In this process, for example, the filler material M is injected into the filling groove 75 via a filling hose (not shown). The filling material M is also discharged from a discharge hole (not shown) formed on the outer circumference of the joint 62 to confirm that the filling material M has filled the insertion hole 74 and the joint 62.

[0065] (Removal process of column base fixing jig) Next, in the column base fixing jig removal process, the bolts 86 (see Figure 8) are removed from the lower precast beam 70, and the column base fixing jig 80 is removed.

[0066] (action) Next, the operation of this embodiment will be described.

[0067] As shown in Figures 4 and 5, according to the column construction method of this embodiment, in the column base fixing jig 80 installation step, the column base fixing jig 80, which is C-shaped in plan view, is installed on the upper surface of the joint portion 72 of the lower precast beam 70.

[0068] Next, as shown in Figures 6 and 7, in the column installation process, the column base portion of the column 30 is fitted inside the column base fixing jig 80, and the connecting pin 40 protruding from the lower end surface of the column 30 is inserted into the insertion hole 74 formed on the upper surface of the joint portion 72 of the lower precast beam 70.

[0069] By fitting the base of the column 30 inside the column base fixing jig 80 in this way, the base of the column 30 can be easily positioned relative to the joint portion 72 of the lower precast beam 70. In addition, the column base fixing jig 80 can restrict the rotation of the column 30 around the connecting pin 40.

[0070] Next, as shown in Figure 1, during the filling process, the column base of the column 30 is fitted inside the column base fixing jig 80, and the filler material M is filled into the insertion hole 74. As this filler material M hardens, the column base of the column 30 is joined to the lower precast beam 70 via the joining pin 40. In addition, by fitting the column base of the column 30 inside the column base fixing jig 80, displacement of the column 30 relative to the lower precast beam 70 is suppressed while the filler material M hardens.

[0071] In this embodiment, the rotation of the column 30 around the connecting pin 40 can be restricted while the column 30 can be easily positioned on the lower precast beam 70.

[0072] Furthermore, a wall 50 is joined to the column 30. A column base fixing jig 80 is positioned along the column 30 shape of the column 30 that protrudes from the wall surface of the wall 50. This prevents the column base fixing jig 80 from interfering with the wall 50 during construction, for example. Therefore, the constructability of the wall 50 is improved.

[0073] Furthermore, the column 30 is made of wood, and the lower precast beam 70 is made of precast concrete. Here, since the wooden column 30 is lighter than the concrete column, it is more likely to rotate around the connecting pin 40. In such cases, this embodiment is particularly effective, as the column base of the column 30 can be fitted inside the column base fixing jig 80, thereby restricting the rotation of the column 30 around the connecting pin 40 while easily positioning the column 30 on the lower precast beam 70.

[0074] (modified version) Next, a modified example of the above embodiment will be described.

[0075] In the above embodiment, the wall 50 is joined to the column 30, and the column base fixing jig 80 is positioned along the column shape of the column 30 that protrudes from the wall surface of the wall 50. However, the wall 50 does not necessarily have to be joined to the column 30. In this case, the installation position of the column base fixing jig 80 can be changed as appropriate.

[0076] Furthermore, in the above embodiment, the outer surface 36S of the column 30 and the side surface 70S of the lower precast beam 70 are substantially flush. However, the outer surface 36S of the column 30 and the side surface 70S of the lower precast beam 70 are not limited to being substantially flush; there may be a step between the outer surface 36S of the column 30 and the side surface 70S of the lower precast beam 70.

[0077] Furthermore, in the above embodiment, multiple level adjustment bolts 60 are provided on the upper surface of the joint portion 72 of the lower precast beam 70. However, the upper surface of the joint portion 72 of the lower precast beam 70 may be provided with more than just multiple level adjustment bolts 60; for example, spacers that form a joint 62 may also be provided.

[0078] Furthermore, in the above embodiment, the structural member is a lower precast beam 70. However, the structural member is not limited to concrete beams such as the lower precast beam 70, but may also be a concrete beam such as a reinforced concrete beam formed by cast-in-place concrete.

[0079] Furthermore, the structural members are not limited to concrete beams, but may also be concrete structural members such as slabs or concrete foundations. Moreover, the structural members are not limited to concrete structural members, but may also be steel structural members formed from, for example, shaped steel or steel pipes.

[0080] Furthermore, in the above embodiment, the column 30 is made of wood. However, the column 30 is not limited to wood; for example, it may be made of reinforced concrete, steel-reinforced concrete, or steel.

[0081] Although one embodiment of the present invention has been described above, the present invention is not limited to these embodiments, and various modifications may be used in appropriate combinations with one embodiment, and of course, the invention can be implemented in various forms without departing from the spirit of the present invention. [Explanation of Symbols]

[0082] 30 pillars 40 connecting pins 50 walls 70 Lower precast beam (concrete structural member) 74 Insertion holes 80 Column base fixing jig M Filler

Claims

1. The column base fixing jig installation process involves installing a C-shaped column base fixing jig on the upper surface of a structural member in a plan view, The column installation process involves fitting the column base portion of the column into the column base fixing jig, and inserting the connecting pin protruding from the lower end surface of the column into the insertion hole formed on the upper surface of the structural member. With the column base portion of the column fitted inside the column base fixing jig, the filling step involves filling the insertion hole with a filler material. A column construction method comprising the following features.

2. A wall is attached to the aforementioned column. The column base fixing jig is positioned along the column shape of the column that protrudes from the wall surface of the wall. The column construction method according to claim 1.

3. The aforementioned pillar is made of wood. The aforementioned structural member is a concrete structural member. The column construction method according to claim 1 or claim 2.

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