JP7352169B2 - Foundation structure and construction method of foundation structure - Google Patents

Description

The present invention relates to a foundation structure that constitutes the frame of a wooden building.

Patent Document 1 discloses a foundation structure consisting of earthen floor concrete, a foundation material main body which is a member obtained by cutting H-beam steel or I-beam steel into short lengths, and wooden columns. The main body of the foundation material is fixed to the concrete floor using anchor bolts and nuts that protrude from the concrete floor. A mounting plate protrudes from the top surface of the base material main body. The lower end of the column has a groove into which the mounting plate fits. The columns are fixed to the base material body by connecting bolts and nuts that pass through the columns and the mounting plate.

Japanese Patent Application Publication No. 2000-220223

The foundation structure described in Patent Document 1 requires an independent foundation material body for each column, so there is a problem that construction is cumbersome. On the other hand, if a beam such as a long H-shaped steel or I-shaped steel is fixed to a foundation slab made of concrete using anchor bolts, and a column is fixed to the beam, It is necessary to precisely match the positions and pitches of the multiple buried anchor bolts with the positions and pitches of the holes formed in the beam material.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide anchor bolts in a foundation structure formed by fixing beam materials such as long H-beams and I-beams to a foundation slab. High accuracy is not required for the position of the beam and the position of the insertion hole of the beam, and the beam can be easily fixed.

(1) The foundation structure according to the present invention includes a foundation slab made of concrete, a buried part buried in the foundation slab, and a part that extends upward from the buried part and projects upward from the top surface of the foundation slab. a plurality of anchor bolts each having a bolt portion; a first piece having a plurality of insertion holes through which the bolt portions are inserted and having a diameter larger than the diameter of the bolt portion; an upper part of the first piece; A steel beam material having a second piece located at the top, a connecting piece connecting the first piece and the second piece, and a connecting piece projecting upward from the upper surface of the second piece, and the connecting piece A wooden post having a fitted groove, a joining member that joins the joining piece and the pillar, and a packaging member disposed in a gap between the inner circumferential surface of the insertion hole and the bolt part. and a hardened member that is ruptured by pressure between the nut fastened to the base slab and the solidified member that flows out from the internal space of the packaging member into the gap and hardens.

The beam material is placed on the foundation slab with a plurality of bolt parts protruding from the foundation slab being inserted into the respective insertion holes. Since the diameter of the insertion hole is larger than the diameter of the bolt portion, a slight misalignment between the insertion hole and the bolt portion is allowed. In the gap between the insertion holes, the nut fastened to the bolt portion is caught between the base slab and the hardened member flows out from the internal space of the broken packaging member. The flowed out hardening member hardens while filling the gap between the insertion hole and the bolt portion. This prevents the beam material from moving on the top surface of the foundation slab.

(2) The foundation slab may have a porch extending outdoors from the beam.

Construction is easy because the porch is integrally formed with the foundation slab.

(3) The basic structure according to the present invention may further include a decorative cover that covers the outdoor side of the beam material.

The decorative cover improves the design of the outdoor side of the beam.

(4) The decorative cover may have a ventilation hole.

The ventilation holes improve air permeability between the decorative cover and the beam material.

(5) A part of the decorative cover is located between the second piece of the beam material and the pillar, and a through hole through which the connecting piece is inserted is formed in the part. It's okay.

Since the connecting piece is inserted into the through hole of the decorative cover and sandwiched between the second piece and the pillar, the decorative cover is difficult to come off from the beam material.

(6) The basic structure according to the present invention has a through hole through which the bolt part is inserted, and is located between the nut fastened to the bolt part and the packaging member, and The packaging member may further include a plate-shaped pressing member that is pressed by the nut fastened to the portion and pressurizes the packaging member.

Since the plate-shaped holding member that covers the top surface of the packaging member is disposed between the nut and the packaging member, when the nut is fastened to the bolt portion, the holding member uniformly presses the top surface of the packaging member. Therefore, regardless of the type of nut, the packaging member can be reliably pressed and broken.

(7) The beam material may have an H-shaped or I-shaped cross-sectional shape, and may further include a stiffener coupled to the first piece and the second piece below the coupling piece.

The stiffener improves the strength of the second piece of the beam that supports the column.

(8) The method for constructing a foundation structure according to the present invention includes a first step of installing a plurality of anchor bolts in a formwork, and a second step of pouring ready-mixed concrete into the formwork and pouring a foundation slab. and a third steel beam material having a plurality of insertion holes having a diameter larger than the diameter of the bolt portion of the anchor bolt, and placing the steel beam material on the foundation slab by inserting each of the bolt portions into the respective insertion holes. a fourth step of arranging a packaging member containing a hardened member in the gap between the inner circumferential surface of the insertion hole and the bolt part; and fastening a nut to the bolt part to break the packaging member. a fifth step, and a sixth step of fitting the column fitting groove into the coupling piece protruding from the upper surface of the beam material and installing the column on the beam material; coupling the column and the coupling piece using a coupling member; A seventh step of doing so.

The present invention can also be viewed as a method for constructing a foundation structure.

(9) In the fifth step, the cured member flowing out from the packaging member is cured.

(10) In the sixth step, a decorative cover may be attached that is partially located between the beam and the pillar and covers the outdoor side of the beam.

The basic structure according to the present invention can horizontally fix beams such as long H-beams and I-beams, and can facilitate the work of fixing beams in the horizontal direction. can.

FIG. 1 is a perspective view of a portion of the basic structure 10. As shown in FIG. FIG. 2 is an exploded perspective view of a portion of the basic structure 10. As shown in FIG. FIG. 3 is a longitudinal cross-sectional view of the foundation structure 10. 4(A) is a plan view of the grout pack 18, FIG. 4(B) is a center sectional view of the grout pack 18, and FIG. 4(C) is a bottom view of the grout pack 18. FIG. 5 is an exploded perspective view of each member that fixes the beam member 12 to the anchor bolt 14. FIG. 6 is a horizontal sectional view of the beam 12. FIG. 7 is an explanatory diagram illustrating construction of the foundation structure 10.

Embodiments of the present invention will be described below. Note that the embodiments described below are merely examples of the present invention, and it goes without saying that the embodiments of the present invention can be modified as appropriate without changing the gist of the present invention.

FIG. 1 is a perspective view showing a part of the basic structure 10 according to this embodiment. The foundation structure 10 constitutes the frame of a wooden building. The building is used, for example, as a store such as a convenience store.

The foundation structure 10 includes a foundation slab 11, a plurality of beam members 12, a plurality of columns 13, a plurality of anchor bolts 14 and nuts 15 (FIG. 3), a plurality of coupling members 16, and one or more decorative members. It includes a cover 17, a grout pack 18, a pressing member 19, and a washer 20 (FIG. 5).

As shown in FIG. 3, the foundation slab 11 is a concrete slab that has a plurality of reinforcements 21 inside. The foundation slab 11 has a flush top surface 22 . That is, the foundation slab 11 does not have a rising part like a cloth foundation, for example. However, the upper surface 22 of the foundation slab 11 does not necessarily have to constitute one plane.

The foundation slab 11 has a foundation part 23 on which the beam material 12 is placed, and a pouch part 24 forming a pouch. That is, the foundation structure 10 constitutes the frame and porch of a building. The foundation portion 23 and the pouch portion 24 do not need to be clearly distinguished by shape or the like, and may be configured as a part of the integrated foundation slab 11.

The anchor bolt 14 has a buried portion 31 buried in the foundation slab 11 and a plurality of bolt portions 32 extending from the buried portion 31. In the example shown in FIG. 3, the anchor bolt 14 has two bolt parts 32. However, the anchor bolt 14 may have only one bolt portion 32.

The buried portion 31 has a plate shape whose thickness direction coincides with the vertical direction. The buried portion 31 is located under the reinforcement 21. The bolt portion 32 extends upward from the upper surface of the buried portion 31, and a portion thereof protrudes upward from the upper surface 22 of the foundation slab 11. The reinforcement 21 is located between the two bolt parts 32. That is, the anchor bolt 14 is arranged at a position where the reinforcement 21 is located between the two bolt parts 32 and the buried part 31 is below the reinforcement 21. Therefore, upward movement of the anchor bolt 14 is restricted by the buried portion 31 coming into contact with the reinforcement 21 .

Anchor bolt 14 is arranged at a position directly below the installation position of pillar 13. However, in addition to the position directly below the pillar 13, the anchor bolt 14 may be installed at another position, or, regardless of the installation position of the pillar 13, for example, along the longitudinal direction 9 of the beam body 41, etc. They may be installed at intervals. Below, an example will be described in which the anchor bolt 14 is arranged at least at a position immediately below the installation position of the pillar 13.

As shown in FIG. 2, the beam member 12 includes a beam main body 41, and a coupling piece 42 and a stiffener 43 attached to the beam main body 41 by welding or the like. In the illustrated example, the beam main body 41 is a so-called H-shaped steel whose cross section is H-shaped. The beam main body 41 has an upper flange 44 and a lower flange 45 that extend in the horizontal direction, and a web 46 that extends in the vertical direction. The lower flange 45 is an example of the first piece. The upper flange 44 is an example of the second piece. Web 46 is an example of a connecting piece.

Web 46 connects upper flange 44 and lower flange 45. Specifically, the upper end of the web 46 is connected to the center portion of the lower surface of the upper flange 44 in the width direction 8, and the lower end of the web 46 is connected to the center portion of the upper surface of the lower flange 45 in the width direction 8. ing. The web 46 also has a circular vent hole 30 passing through the web 46 . The vent 30 allows communication between indoors and outdoors.

In the following description, the portions on both sides of the lower flange 45 with the web 46 interposed therebetween will be described as a first lower flange portion 47 and a second lower flange portion 48, respectively. Further, in the following description, it is assumed that the first lower flange portion 47 is a flange portion facing indoors, and the second lower flange portion 48 is a flange portion facing outdoors.

The lower flange 45 includes a plurality of insertion holes 49 into which the bolt portions 32 of the anchor bolts 14 are inserted. The number of insertion holes 49 provided in the lower flange 45 is equal to the number of anchor bolts 14 multiplied by the number of bolt portions 32 that the anchor bolts 14 have. For example, when the anchor bolt 14 has two bolt parts 32, two insertion holes 49 are set as one pair of insertion holes 49, and the same number of pairs of insertion holes 49 as the number of anchor bolts 14 are provided in the lower flange 45. .

As shown in FIG. 6, one of the pair of insertion holes 49 is provided in the first lower flange portion 47, and the other is provided in the second lower flange portion 48. That is, the beam main body 41 is fixed to the foundation slab 11 on both sides of the lower flange 45 in the width direction 8. Therefore, the beam main body 41 is fixed to the foundation slab 11 more reliably than if it is fixed to the foundation slab 11 only on one side of the lower flange 45 in the width direction 8. However, the insertion hole 49 may be provided only in the first lower flange portion 47 or only in the second lower flange portion 48.

One set of insertion holes 49 and another set of insertion holes 49 are spaced apart from each other in the longitudinal direction 9 of the beam body 41. The relative positions of one set of insertion holes 49 and the other set of insertion holes 49 include manufacturing errors. Further, the relative positions between the plurality of anchor bolts 14 include construction errors. The diameter D1 (FIG. 2) of the insertion hole 49 is set so that all the bolt parts 32 can be inserted into the insertion hole 49 regardless of the error in the relative position between the insertion holes 49 and the error in the relative position between the anchor bolts 14. The diameter D2 (FIG. 2) of the bolt portion 32 is made larger. For example, the diameter D1 of the insertion hole 49 is larger than the diameter D2 of the bolt portion 32 by several cm to more than ten cm.

The connecting piece 42 of the beam 12 shown in FIG. 2 is for connecting the column 13 and the beam 12. To explain in detail, the coupling piece 42 is plate-shaped and protrudes upward from the upper surface of the upper flange 44. For example, the connecting piece 42 is formed by welding a plate material produced by cutting or punching a steel plate to the upper flange 44 of the beam main body 41.

The thickness direction of the connecting piece 42 corresponds to the width direction 8 of the beam main body 41. However, the thickness direction of the coupling piece 42 may coincide with the longitudinal direction 9 of the beam body 41. The coupling piece 42 is fitted into a fitting groove 61 provided in the pillar 13, which will be described later.

The coupling piece 42 has a through hole 50 that passes through the coupling piece 42 in the thickness direction. In the illustrated example, the coupling piece 42 has two through holes 50 aligned along the longitudinal direction 9. A coupling member 16, which will be described later, is press-fitted into the through hole 50 and a through hole 62 provided in the pillar 13, which will be described later. That is, the column 13 is fixed to the coupling piece 42 by the coupling member 16.

As shown in FIG. 4, grout pack 18 includes a body 51, a seal 52, and grout 53. The main body 51 is, for example, a resin molded product. The grout pack 18 is an example of a packaging member.

The main body 51 has a box shape with an open top. Further, the main body 51 has a donut shape and has a through hole 54 in the center. The diameter D3 of the through hole 54 is approximately the same as the diameter D2 (FIG. 2) of the bolt portion 32 of the anchor bolt 14, or slightly larger than the diameter D2. That is, the bolt portion 32 can be inserted through the through hole 54.

The main body 51 includes liquid grout 53 . As the grout 53, for example, cement (mortar) type grout can be used. The grout 53 is a hardening agent that hardens over time after flowing out from the main body 51. By hardening, the grout 53 becomes a hardened member 55 (FIG. 3), which will be described later. A grout with a small shrinkage rate upon curing is suitable for the grout 53.

The diameter D4 of the main body 51 may be approximately the same as the diameter D1 (FIG. 2) of the insertion hole 49 that the lower flange 45 has, may be slightly smaller than the diameter D1, or may be larger than the diameter D1. . The diameter D4 of the main body 51 is such that the main body 51 has a sufficient amount of grout 53 to fill the gap 56 between the outer peripheral surface of the bolt portion 32 of the anchor bolt 14 and the inner peripheral surface of the insertion hole 49 of the lower flange 45. The size is such that it can contain.

The height H of the main body 51 is at least larger than the plate thickness T (FIG. 3) of the lower flange 45. Therefore, the body 51 can contain a sufficient amount of grout 53 to fill the gap 56 (FIG. 3). For example, the height H of the main body 51 is 1.5 to 3 times the thickness T of the lower flange 45.

The wall thickness of the main body 51 is sufficiently thin so that the main body 51 can be deformed by fastening the nut 15 to the bolt portion 32. For example, the thickness of the main body 51 is within the range of 0.3 mm to 1 mm.

The main body 51 includes a breaking portion 59 on the bottom surface. The fracture portion 59 is, for example, a V-shaped groove recessed from the bottom surface. The breaking portion 59 is provided at a position concentric with the circular through hole 54 of the main body 51 . That is, the fracture portion 59 has an annular shape. The main body 51 is broken by being pressurized from above by a presser member 19, which will be described later. When the main body 51 is broken at the breaking portion 59, the grout 53 contained in the main body 51 flows out from the main body 51 into the gap 56.

The seal 52 is rectangular and sheet-shaped with a size that can close the opening of the main body 51. The seal 52 is attached to the upper surface of the main body 51 by welding or adhesive, and closes the opening of the main body 51. That is, the grout 53 is enclosed in a space defined by the main body 51 and the seal 52. Note that the main body 51 has a flange 57 on the top that increases the area of the top surface to which the seal 52 is adhered. That is, the seal 52 reliably closes the opening of the main body 51 and prevents the grout 53 from leaking from the main body 51.

The seal 52 has a circular through hole 58 in the center having a diameter that is approximately the same as the diameter of the through hole 54 of the main body 51 . The seal 52 is attached to the upper surface of the main body 51 so that the through hole 58 overlaps the through hole 54 of the main body 51.

As shown in FIG. 5, the holding member 19 has a plate shape made of steel, and is manufactured, for example, by cutting or punching a steel plate. The holding member 19 has a circular through hole 60 into which the bolt portion 32 of the anchor bolt 14 is inserted. The diameter of the through hole 60 is slightly larger than the diameter D2 of the bolt portion 32. The holding member 19 is located between the nut 15 and washer 20 and the grout pack 18. When the nut 15 is fastened to the bolt portion 32 of the anchor bolt 14, the holding member 19 is pushed by the nut 15 via the washer 20 and moves downward. The pressing member 19 that has moved downward applies pressure to the grout pack 18 from above. The pressurized grout pack 18 ruptures at the rupture portion 59 of the main body 51, and the grout 53 contained therein flows out into the gap 56.

The washer 20 is located between the nut 15 and the holding member 19. For example, a ready-made washer can be used as the washer 20.

The pillar 13 shown in FIG. 2 is made of wood. For example, the pillars 13 are made of laminated wood made by pasting together wooden boards. The pillar 13 includes a fitting groove 61 recessed from the lower surface. The coupling piece 42 of the beam member 12 is fitted into the fitting groove 61 .

The pillar 13 has a circular through hole 62 that passes through the pillar 13 in the horizontal direction. The through hole 62 is provided at a position that overlaps the through hole 50 of the coupling piece 42 fitted into the insertion groove 61 in the horizontal direction. The diameter of the through hole 62 is approximately the same as the diameter of the through hole 50 of the coupling piece 42 . The coupling member 16 is inserted into the through hole 62.

The coupling member 16 has a cylindrical shape and has a length that is approximately the same as the width of the column 13. Further, the diameter of the coupling member 16 is approximately the same as the diameter of the through hole 62 of the column 13 and the diameter of the through hole 50 of the coupling piece 42. The coupling member 16 is press-fitted into the through hole 62 of the column 13 and the through hole 50 of the coupling piece 42, and fixes the column 13 to the coupling piece 42. Note that the coupling member 16 may be a bolt inserted into the through hole 62 of the column 13 and the through hole 50 of the coupling piece 42, and a nut fastened to the bolt.

The decorative cover 17 is a member that covers the beam material 12 and improves the appearance of the building. The decorative cover 17 is, for example, a resin molded product made of synthetic resin.

The decorative cover 17 is a long member that extends along the longitudinal direction 9 of the beam member 12 and has an inverted L-shaped cross section. The length of the decorative cover 17 in the longitudinal direction 9 is approximately the same as the length of the beam member 12 in the longitudinal direction 9. However, when a plurality of decorative covers 17 are attached to one beam 12, the length of the decorative cover 17 may be shorter than the length of the beam 12.

The decorative cover 17 includes a mounting plate 71 for attaching to the beam 12 and a decorative board 72 that covers the beam 12.

The mounting plate 71 has a plate shape extending in the horizontal direction. The mounting plate 71 has a plurality of rectangular through holes 74 into which the connecting pieces 42 of the beam material 12 are inserted. The mounting plate 71 is located between the pillar 13 and the upper flange 44 of the beam 12, and the beam mounting plate 71, which is sandwiched between the pillar 13 and the upper flange 44, is an example of a part of the decorative cover. be.

The decorative board 72 has a plate shape extending in the vertical direction. The length of the decorative board 72 in the vertical direction, that is, the height of the decorative board 72 is approximately the same as the height of the beam member 12. The upper end of the decorative board 72 is connected to the end of the mounting plate 71 in the width direction. On one surface of the decorative board 72 that is perpendicular to the width direction and faces outdoors, characters, figures, etc. that enhance the design of the decorative cover 17 may be formed.

The decorative board 72 has one or more ventilation holes 73 . The vent 73 has a circular shape. However, the vent 73 may have other shapes such as a rectangle.

A mesh member 76 closes the vent 73 of the decorative board 72. The mesh member 76 is, for example, a resin molded product molded into a mesh shape. The mesh member 76 allows air to circulate between indoors and outdoors, and prevents insects, small animals, foreign objects, and the like from entering the indoors from the outdoors.

Next, construction of the foundation structure 10 will be explained with reference to FIG. 7. First, in the first step, a worker installs a formwork on the ground. Then, the worker places the plurality of reinforcing bars 21 and anchor bolts 14 within the formwork. The plurality of reinforcing bars 21 are arranged, for example, in a grid pattern. After the anchor bolt 14 is arranged so that the buried part 31 is located below the reinforcement 21 and the reinforcement 21 is located between the two bolt parts 32, it is fixed to the reinforcement 21 using a wire or the like. be done.

Next, in a second step, the worker pours ready-mixed concrete into the formwork and casts the foundation slab 11. The poured foundation slab 11 has a pouch section 24 in addition to a foundation section 23 on which the beam material 12 is placed. That is, the porch is constructed integrally with the basic structure 10.

After the second step and after the fresh concrete has completely hardened, the worker installs the beams 12 in the third step. Specifically, the worker inserts the bolt part 32 of the anchor bolt 14 protruding from the upper surface 22 of the foundation slab 11 into the insertion hole 49 of the lower flange 45 of the beam 12, and inserts the beam 12 into the foundation slab 11. Place it on.

Next, the worker fixes the beam material 12 to the foundation slab 11 in a fourth step. Specifically, the operator attaches the grout pack 18 by inserting the bolt portion 32 of the anchor bolt 14 into the through holes 54 and 58 of the grout pack 18. Next, the operator attaches the presser member 19 by inserting the bolt portion 32 into the through hole 60 of the presser member 19. Then, the operator fits the washer 20 onto the bolt portion 32.

Next, in the fifth step, the operator fits the nut 15 into the bolt portion 32 of the anchor bolt 14 and tightens the nut 15. The tightened nut 15 pushes the presser member 19 downward. The pressing member 19 pressed by the nut 15 presses the grout pack 18 downward. The main body 51 of the grout pack 18 pressed by the holding member 19 is pushed into the gap 56 between the inner peripheral surface of the insertion hole 49 of the lower flange 45 of the beam main body 41 and the bolt portion 32 . When the operator further tightens the nut 15, the grout pack 18 is pressurized from above by the presser member 19, and the main body 51 breaks at the breakage portion 59. The grout 53 contained in the main body 51 flows out from the broken main body 51. That is, the grout 53 flows out from the bottom of the main body 51. The grout 53 flowing out from the grout pack 18 flows into the gap 56. After fastening the nut 15 to the bolt portion 32, the operator waits for a period required for the grout 53 to harden. The hardened grout 53 becomes a hardened member 55 that fills the gap 56. The hardening member 55 filled in the gap 56 prevents the beam material 12 from moving in the horizontal direction and being misaligned.

Next, the worker fixes the decorative cover 17 and the pillar 13 to the beam material 12 in a sixth step. Specifically, the operator attaches the decorative cover 17 to the beam 12 by inserting the connecting piece 42 of the beam 12 into the through hole 74 of the mounting plate 71 of the decorative cover 17 . Next, the operator inserts the connecting piece 42 of the beam 12 into the insertion groove 61 of the column 13, and places the column 13 on the beam 12. The pillar 13 placed on the beam 12 and the upper flange 44 of the beam 12 sandwich the mounting plate 71 of the decorative cover 17 .

Next, in a seventh step, the operator press-fits the coupling member 16 into the through hole 62 of the column 13 and the through hole 50 of the coupling piece 42 of the beam 12 to fix the column 13 to the beam 12. The pillar 13 fixed to the beam 12 fixes the decorative cover 17 to the beam 12.

The basic structure 10 and the porch are constructed by executing the first to seventh steps by the worker.

[Operations and effects of embodiment]
In this embodiment, the diameter D1 of the insertion hole 49 of the lower flange 45 of the beam member 12 is larger than the diameter D2 of the bolt part 32 of the anchor bolt 14, so that the relative positional deviation between the insertion holes 49 due to manufacturing errors, An operator can insert the bolt parts 32 into the insertion holes 49 and install the beam 12 on the foundation slab 11, regardless of errors in the relative positions between the bolt parts 32 during construction.

Furthermore, in this embodiment, since the gap 56 between the insertion hole 49 and the bolt portion 32 is filled with the hardened member 55, the hardened member 55 prevents the beam member 12 from moving in the horizontal direction. Since the grout pack 18 is used to form the hardened member 55, the work required to fill the gap 56 with the hardened member 55 is easy.

Further, in this embodiment, the pouch is formed integrally with the foundation structure 10 by the foundation slab 11. Therefore, construction is easier than constructing the foundation structure 10 and the porch separately.

Moreover, in this embodiment, the decorative cover 17 covers the beam material 12. Therefore, the design of the basic structure 10 is improved.

Further, in this embodiment, the decorative cover 17 is provided with a vent 73. Therefore, ventilation between indoors and outdoors is improved.

In addition, in this embodiment, the coupling piece 42 is inserted into the through hole 74 provided in the mounting plate 71 of the decorative cover 17, and the mounting plate 71 is sandwiched between the column 13 and the upper flange 44 of the beam member 12. 17 is fixed to the beam member 12. Therefore, the decorative cover 17 can be securely fixed to the beam 12. Further, since the decorative cover 17 can be fixed to the beam 12 without using screws or the like, the workability of the basic structure 10 is improved.

Furthermore, in this embodiment, the plate-shaped holding member 19 is disposed between the grout pack 18 and the nut 15, so when the nut 15 is fastened to the bolt portion 32 of the anchor bolt 14, the holding member 19 is placed between the grout pack 18 and the nut 15. The pack 18 is pressurized uniformly from above to break the breakage portion 59 of the main body 51. Therefore, regardless of the type of nut 15, the grout pack 18 can be reliably ruptured and the grout 53 can flow out from the grout pack 18. As a result, the gap 56 between the inner peripheral surface of the insertion hole 49 of the beam member 12 and the bolt portion 32 can be reliably filled with the hardened member 55.

Further, in this embodiment, a stiffener 43 connected to an upper flange 44 and a lower flange 45 is provided directly below the connecting piece 42 of the beam member 12 that is connected to the column 13. Therefore, the stiffener 43 improves the strength of the beam 12 in the vertical direction, and the column 13 is reliably supported by the beam 12.

Furthermore, in the present embodiment, the fracture portion 59 provided in the main body 51 of the grout pack 18 has an annular shape, so that uneven flow of the grout 53 from the grout pack 18 is suppressed. As a result, the gap 56 can be reliably filled with the hardened member 55.

Furthermore, in this embodiment, the mounting plate 71 of the decorative cover 17 made of resin is located between the steel beam 12 and the wooden pillar (not shown). Therefore, even if dew condensation occurs on the steel beam 12, the wooden columns are prevented from absorbing the moisture caused by the condensation. As a result, the durability of the pillar is improved. Note that since the decorative cover 17 is made of resin, dew condensation is unlikely to occur on the mounting plate 71 of the decorative cover 17. In addition, if the pillar can be made waterproof so as not to absorb moisture caused by condensation, the decorative cover 17 is a metal molded product formed by cutting, cutting, bending, etc. a metal plate such as a stainless steel plate. There may be.

[Modified example]
In the embodiments described above, an example has been described in which the foundation slab 11 has the foundation part 23 and the pouch part 24. However, the foundation slab 11 may not have the pouch portion 24. In that case, the porch may be cast separately from the foundation structure 10.

In the above-described embodiment, an example in which the beam main body 41 is an H-shaped steel has been described. However, the beam main body 41 may be a steel material having another shape, such as a so-called I-beam steel having an I-shape cross-sectional shape.

In the embodiments described above, the main body 51 of the grout pack 18 has a cylindrical shape. However, the main body 51 of the grout pack 18 may have any other shape as long as it is box-shaped with an open top.

In the above-described embodiment, an example has been described in which the grout pack 18 is composed of a box-shaped main body 51 and a sticker 52 affixed to the main body 51. However, the grout pack 18 may be a bag in which the grout 53 is sealed, or may have another structure.

In the above-described embodiment, an example has been described in which the decorative cover 17 has the mounting plate 71 and the decorative cover 17 is fixed to the beam material 12 by the mounting plate 71. However, the decorative cover 17 may not include the mounting plate 71. In that case, the decorative cover 17 is attached to the beam material 12 using, for example, screws, bolts, adhesive, or the like.

In the above-described embodiment, an example was described in which the mesh member 76 was attached to the ventilation hole 73 provided in the decorative cover 17. However, the mesh member 76 may not be used in the decorative cover 17. In that case, for example, a plurality of small ventilation holes are provided in the decorative plate 72 of the decorative cover 17 to prevent entry of insects, small animals, and foreign objects.

In the above-described embodiment, an example in which the beam main body 41 has the stiffener 43 has been described. However, the beam main body 41 may not include the stiffener 43.

In the above-described embodiment, an example in which the grout pack 19 is held down by the holding member 19 has been described. However, the grout pack 19 may also be held down by the nut 15. The pressing member 19 may be omitted.

10... Foundation structure 11... Foundation slab 12... Beam material 13... Column 14... Anchor bolt 15... Nut 16... Connecting member 17... Decorative cover 18...・Gout pack (packaging material)
19... Pressing member 24... Pouch part 31... Buried part 32... Bolt part 42... Connection piece 43... Stiffener 44... Upper flange (second piece)
45...Lower flange (first piece)
46...Web (connection piece)
49... Insertion hole 53... Grout 55... Hardened member 56... Gap 71... Mounting plate 73... Ventilation port 74... Through hole

Claims (10)

A foundation slab made of concrete,
a plurality of anchor bolts each having a buried part buried in the foundation slab, and a bolt part extending upward from the buried part and protruding upward from the upper surface of the foundation slab;
A first piece having a plurality of through holes through which the bolt portion is inserted and having a diameter larger than the diameter of the bolt portion, a second piece located above the first piece, and the first piece. and a steel beam member having a connection piece that connects the second piece and a connecting piece that projects upward from the top surface of the second piece;
a wooden post having a fitting groove into which the connecting piece is fitted;
a connecting member that connects the connecting piece and the pillar;
The packaging member disposed in the gap between the inner circumferential surface of the insertion hole and the bolt part is ruptured by pressure between the nut fastened to the bolt part and the foundation slab, and the inside of the packaging member is broken. A basic structure comprising: a hardened member that flows from the space into the gap and hardens. The foundation structure according to claim 1, wherein the foundation slab has a porch portion extending outdoors from the beam. The basic structure according to claim 2, further comprising a decorative cover that covers the outdoor side of the beam. The basic structure according to claim 3, wherein the decorative cover has a ventilation hole. A portion of the decorative cover is located between the second piece of the beam material and the pillar, and a through hole through which the connecting piece is inserted is formed in the portion. 4. The basic structure according to 3 or 4. It has a through hole through which the bolt part is inserted, and is located between the nut fastened to the bolt part and the packaging member, and is pressed by the nut fastened to the bolt part to The basic structure according to any one of claims 1 to 5, further comprising a plate-shaped pressing member that presses the packaging member. 7. The beam material has an H-shaped or I-shaped cross-sectional shape, and further includes a stiffener connected to the first piece and the second piece below the connecting piece. Basic structure described. A first step of installing a plurality of anchor bolts within the formwork;
a second step of pouring fresh concrete into the formwork and placing a foundation slab;
a third step of placing a steel beam material having a plurality of insertion holes with a diameter larger than the diameter of the bolt portion of the anchor bolt on the foundation slab by inserting each of the bolt portions into the respective insertion holes; ,
a fourth step of arranging a packaging member containing a hardening member in the gap between the inner circumferential surface of the insertion hole and the bolt part;
a fifth step of fastening a nut to the bolt portion and breaking the packaging member;
a sixth step of fitting the column fitting groove into the coupling piece protruding from the upper surface of the beam material, and installing the column in the beam material;
A method for constructing a foundation structure, comprising: a seventh step of connecting the column and the connecting piece using a connecting member. 9. The method for constructing a basic structure according to claim 8, wherein in the fifth step, the hardening member flowing out from the packaging member is hardened. 10. The method for constructing a foundation structure according to claim 8, wherein in the sixth step, a decorative cover is installed, a part of which is located between the beam and the pillar and covers the outdoor side of the beam.

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