Connection construction method between wooden member and concrete surface

Abstract

To provide a connection construction method that eases the works to connect a wooden member to a concrete surface, and can fix hollow steel rods inside steel-rod-fixing holes in a stable condition with fill-and-fix agent filled.SOLUTION: A connection construction method is constituted with: a fixing-hole-drilling process to form multiple steel-rod-fixing holes 12 on the lower end surface 11b of a wooden column 11; a steel-rod-fixing process in which, on a base plate 20, the end opening 22a of one end is placed at one surface 20a while the other end side being erected from the other surface 20b, fixing the hollow steel rods 22; a base plate integration process in which each hollow steel rod 22 is inserted into the steel-rod-fixing holes 12 and a fill-and-fix agent 14 is injected and solidified to fix the base plate 20 as an integrated body to the lower end surface 11b of the wooden column 11; and a wooden-member-connection process in which the base plate 20 is connected to a concrete surface 30a with use of connection means 26 to connect the wooden column 11 to the concrete surface 30a as an integrated body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for joining wooden components to concrete surfaces, and in particular to a method for joining wooden components to concrete surfaces using the GIR method, in which hollow steel rods are inserted into steel rod fixing holes drilled in the wooden components, and then a filling and solidifying agent is filled and solidified to join the components together. [Background technology]

[0002] In recent years, various techniques have been proposed for incorporating wooden structural components into concrete-based buildings, preferably with consideration for the environment. One structure being considered for joining wooden components, such as wooden pillars, while they are placed upright on a concrete surface such as a reinforced concrete slab is a joint structure using the GIR method, in which a hollow steel rod is inserted into a steel rod fixing hole drilled in the wooden pillar, and a filling and hardening agent is filled into the fixing hole via the inserted hollow steel rod, allowing it to harden, thereby joining the components together.

[0003] Furthermore, for example, Patent Documents 1 and 2 listed below disclose joint structures for joining precast concrete columns, which are not wooden members, in an upright position to the surface of a reinforced concrete slab. In these joint structures, a precast concrete column is fabricated by inserting the main column reinforcement bars partway through a splice sleeve located at the bottom end and then embedding these together with tie bars. The precast concrete column is then erected on a leveler placed on the slab, with the main column reinforcement bars protruding from the slab surface inserted into the splice sleeve. A grout formwork is then placed around the bottom end of the column, and grout is injected into the splice sleeve and into the gap between the splice sleeve and the slab surface through grout injection holes located on the side of the bottom end of the precast concrete column, and allowed to harden, thereby joining the bottom surface of the column to the slab surface and the main column reinforcement bars above and below. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 4-52815 [Patent Document 2] Japanese Unexamined Patent Publication No. 7-18738 Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, when the GIR method is used to join wooden components, such as wooden pillars, while they are erected on a concrete surface, similar to the structure of the joints of the conventional precast concrete pillars described above, it is possible to join the wooden pillars while they are erected on a concrete surface with a plurality of hollow steel rods protruding from a concrete surface, such as a reinforced concrete slab, via a metal base plate, and the wooden pillar to be erected has the protruding hollow steel rods inserted into a plurality of steel rod fixing holes drilled in its lower end surface.After that, a filling and solidifying agent is injected into each of the steel rod fixing holes through the hollow steel rods and solidified, thereby joining the wooden pillars while they are erected on a concrete surface.

[0006] However, if a technology similar to this joint structure for precast concrete columns is to be used for wooden components, such as wooden columns, it takes a lot of effort to precisely position multiple hollow steel rods so that they each protrude from predetermined positions on the concrete surface to correspond to each of the multiple steel rod fixing holes drilled into the wooden component.It also takes a lot of effort at the construction site to insert the multiple hollow steel rods protruding from the concrete surface into the steel rod fixing holes, and then erect the wooden component, such as a wooden column, onto the concrete surface.

[0007] In particular, since it is difficult to create an injection path around the outer periphery of a wooden component to send the fluid filling and solidifying agent into the hollow steel rod, it is necessary to develop a means to fill the filling and solidifying agent into the steel rod fixing hole into which the hollow steel rod has been inserted, thereby enabling the hollow steel rod to be fixed as a single unit to the steel rod fixing hole.

[0008] The present invention aims to provide a method for joining wooden members to concrete surfaces using the GIR method, which makes it easy to join wooden members to concrete surfaces at construction sites and can easily fix them as a single unit in a stable state by filling a hollow steel rod inside the steel rod fixing hole and a filling and solidifying agent into the steel rod fixing hole. [Means for solving the problem]

[0009] The present invention is a method for joining wooden members to concrete surfaces using the GIR method, in which hollow steel rods are inserted into steel rod fixing holes drilled and formed in wooden members, and a filling and hardening agent is filled into the steel rod fixing holes via the inserted hollow steel rods and hardened to join the members. The method includes a fixing hole drilling step of drilling and forming a plurality of steel rod fixing holes in the joining end faces of the wooden members, into which the hollow steel rods are inserted and fixed; a steel rod fixing step of fixing a plurality of hollow steel rods to a metal base plate having a planar shape slightly larger than the joining end faces of the wooden members, at positions corresponding to the plurality of steel rod fixing holes in the joining end faces of the wooden members, with one end opening facing one side and the other end opening standing upright from the other side; and a step of fixing the base plate with the hollow steel rods standing upright by inserting each of the hollow steel rods into the steel rod fixing holes. The above-mentioned object has been achieved by providing a method for joining wooden members to concrete surfaces, which includes: a base plate integration process in which the base plate is fixed integrally to the joining end surface of the wooden member by injecting and filling the filling and solidifying agent into each of the steel rod fixing holes via the hollow steel rod from the end opening of one end facing the one surface, with the other surface being in close contact with the joining end surface of the wooden member, and then solidifying the filling and solidifying agent; and a wooden member joining process in which the base plate, which has been fixed integrally to the joining end surface of the wooden member, is joined to the concrete surface, which is the joining surface, via joining means provided on the part of the base plate that protrudes from the joining end surface of the wooden member, thereby joining the wooden member integrally to the concrete surface.

[0010] Furthermore, in the method of joining a wooden member to a concrete surface of the present invention, it is preferable that the wooden member is a wooden pillar, the joining end surface of the wooden member is the lower end surface of the wooden pillar, and the concrete surface is the upper surface of a concrete slab.

[0011] In addition, in the method of joining wooden members to concrete surfaces of the present invention, it is preferable that the wooden post has a rectangular cross-sectional shape and that the metal base plate has a rectangular planar shape that is one size larger than the rectangular cross-sectional shape of the wooden post.

[0012] Furthermore, in the method of joining wooden members to a concrete surface of the present invention, it is preferable that the joining means provided in the portion of the base plate that protrudes from the joining end face of the wooden member is a plurality of bolt fastening holes formed in the protruding portion for fastening anchor bolts that protrude from the concrete surface and are embedded therein.

[0013] Furthermore, in the method of joining wooden members to concrete surfaces of the present invention, the fastening hole drilling process, the steel rod fixing process, and the base plate integration process are preferably carried out at the wooden member manufacturing factory, and the wooden member joining process is preferably carried out at the construction site to which the wooden member with the base plate fixed has been transported. [Effects of the Invention]

[0014] According to the method of joining wooden members to concrete surfaces of the present invention, the work of joining wooden members to concrete surfaces can be easily carried out at the construction site, and a hollow steel rod can be placed inside the steel rod fixing hole and a filling and solidifying agent can be filled into the steel rod fixing hole, making it easy to fix the members together in a stable manner. [Brief explanation of the drawings]

[0015] [Figure 1]FIG. 1 is a schematic cross-sectional view illustrating a state in which a wooden pillar, which is a wooden member, is erected and joined to a concrete surface using a method for joining wooden members to a concrete surface according to a preferred embodiment of the present invention. [Figure 2] FIG. 1 is a bottom view of a wooden pole. [Figure 3] FIG. 1(a) is a top view of the base plate, and FIG. 1(b) is a schematic cross-sectional view taken along the line AA in FIG. [Figure 4] 10(a) and 10(b) are schematic cross-sectional views illustrating the process of fixing a base plate integrally to the lower end of a wooden pillar in which multiple steel rod fixing holes have been drilled during the fixing hole drilling process at a manufacturing factory. [Figure 5] FIG. 10 is a schematic cross-sectional view illustrating a state in which a plurality of hollow steel bars are erected on a base plate during a steel bar fixing process in a manufacturing plant. [Figure 6] 1(a) and 1(b) are schematic cross-sectional views illustrating the process of fixing a base plate with multiple hollow steel rods erected on the lower end of a wooden pillar as a single unit during the base plate integration process at a manufacturing factory. [Figure 7] 1 is a schematic cross-sectional view illustrating the process of fixing a base plate with multiple hollow steel rods standing upright to the lower end of a wooden pillar during the base plate integration process at a manufacturing factory. [Figure 8] 10(a) to 10(c) are explanatory diagrams showing a state in which a wooden pillar is erected and its upright lower end is joined to a concrete surface in a wooden member joining process at a construction site. DETAILED DESCRIPTION OF THE INVENTION

[0016] A preferred embodiment of the present invention is a method for joining wooden members to a concrete surface. This method uses a glass-in-place (GIR) technique, known as a joining technique, to join wooden members by inserting a hollow steel rod 22 into a steel rod fixing hole 12 drilled in a wooden post 11, and then filling and solidifying a filling and solidifying agent 14 into the steel rod fixing hole 12 via the inserted hollow steel rod 22. This technique is employed to easily and smoothly join a wooden member, such as a wooden post 11, in an upright position to a concrete surface 30a, such as the top surface of a reinforced concrete slab 30 (see FIGS. 8(a)-(c)). That is, the method for joining wooden members to a concrete surface according to this embodiment facilitates the joining of a wooden member, such as a wooden post 11, to a concrete surface at a construction site, and also facilitates the stable and integral fixation of the hollow steel rod 22 within the steel rod fixing hole 12.

[0017] The joining method of the present embodiment for joining wooden members to a concrete surface is a joining method using the GIR method, in which hollow steel rods 22 are inserted into the steel rod fixing holes 12 drilled and formed in the wooden members 11, and a filling and hardening agent 14 is filled into the steel rod fixing holes 12 via the inserted hollow steel rods 22 and hardened to join the members (the wooden column 11 and the reinforced concrete slab 30). As shown in FIGS. 4 to 7, a fastening hole drilling method is used to drill and form a plurality of steel rod fixing holes 12 into which the hollow steel rods 22 are inserted and fixed in the lower end surface 11b of the wooden column 11, which is the joining end surface of the wooden members. a steel rod fixing step (see FIG. 4(a)) for fixing a plurality of hollow steel rods 22 to a metal base plate 20 having a planar shape slightly larger than the lower end surface 11b of the wooden column 11, which is the joint end surface of the wooden member, at positions corresponding to the plurality of steel rod fixing holes 12 in the lower end surface 11b of the wooden column 11, with the end openings 22a at one end facing one surface 20a and the end openings 22b at the other end standing upright from the other surface 20b (see FIG. 5); and a steel rod fixing step (see FIG. 5) for fixing the base plate 20 with the hollow steel rods 22 standing upright, with the hollow steel rods 22 fixed to the steel rods In a base plate integration process, the base plate 20 is inserted into the fixing holes 12 and the other surface 20b is brought into close contact with the lower end surface 11b of the wooden column 11, which is the joint end surface of the wooden member, and a filling and hardening agent 14 is injected into each of the steel rod fixing holes 12 through the hollow steel rod 22 from the end opening 22a at one end facing one surface 20a, and then hardened, thereby fixing the base plate 20 integrally to the lower end surface 11b of the wooden column 11, which is the joint end surface of the wooden member (see Figures 6(a), (b), and 7). The process includes a wooden member joining process in which the base plate 20, which is fixed integrally to the end face 11b of the wooden column 11, is joined to the concrete surface 30a, which is the surface to be joined, for example, the upper surface of a reinforced concrete slab 30, as shown in Figures 8(a) to 8(c), via joining means 26 (see Figures 3(a) and (b)) provided on the portion of the base plate 20 that protrudes from the lower end face 11b of the wooden column 11, which is the joining end face of the wooden member, thereby joining the wooden column 11, which is a wooden member, integrally to the concrete surface 30a.

[0018] In addition, in the method of joining wooden members to a concrete surface in this embodiment, the joining means 26 provided on the base plate 20 in the portion that protrudes from the lower end surface 11b of the wooden column 11, which is the joining end surface of the wooden member, is preferably a plurality of bolt fastening holes 21 formed in the protruding portion, for fastening anchor bolts 31 that are embedded and erected from the concrete surface 30a by the upper surface of the reinforced concrete slab 30 (see Figures 1, 3(a) and (b)).

[0019] Furthermore, in the method of joining wooden members to a concrete surface of this embodiment, the above-mentioned fastening hole drilling process, steel rod fixing process, and base plate integration process are preferably carried out at a manufacturing factory for the wooden member, wooden pillar 11, and the wooden member joining process is carried out at a construction site to which the wooden member, wooden pillar 11, to which the base plate 20 is fixed, has been transported.

[0020] In this embodiment, the above-mentioned fastening hole drilling process, steel rod fixing process, and base plate integration process are preferably carried out in a manufacturing factory for the wooden pillar 11, which is a wooden component, so that the wooden pillar 11, which is a wooden component, is provided with a joint structure 10 to the concrete surface of the erected lower end of the wooden pillar, as shown below. That is, as shown in Figures 1 and 8, the joint structure 10 for attaching the wooden pillar 11 to a concrete surface at the lower end 11a of the wooden pillar 11 serves as a concrete surface 30a on which anchor bolts 31 are arranged, for example, as a structure for attaching the wooden pillar 11 by erecting it from the top surface of a reinforced concrete slab 30. The joint structure includes a metal base plate 20 having a plurality of steel rod fixing holes 12 drilled and extending axially from the lower end surface 11b of the wooden pillar 11, and bolt fastening holes 21 for fastening the anchor bolts 31, and having a plurality of hollow steel rods 22 erected thereon to be inserted and fastened to the steel rod fixing holes 12 of the wooden pillar 11 (see Figure 5).

[0021] Preferably, a positioning fitting hole 13 is formed in the lower end surface 11b of the wooden pillar 11 (see Figure 2), and the base plate 20 is provided with a positioning protrusion 23 (see Figure 3(b)) that is fitted into the positioning fitting hole 13 to prevent the base plate 20 from shifting position relative to the lower end surface 11b of the wooden pillar 11. The base plate 20 also has a plurality of tapped holes 24 (see Figures 3(a) and (b)) that are each screwed into a hollow steel rod 22, with one end opening 22a facing the lower surface, which is one surface 20a of the base plate 20, and the other end opening 22b standing upright from the base plate 20 (see Figure 5).

[0022] Preferably, the plurality of steel rod fixing holes 12 and the plurality of tapped holes 24 are formed in a positional relationship that allows the centers of the holes 12 and the tapped holes 24 to be aligned so that, when the positioning projections 23 are fitted into the positioning fitting holes 13 and the base plate 20 is in close contact with the lower end surface 11b of the wooden pillar 11, and when the plurality of hollow steel rods 22 extending upright from the tapped holes 24 are inserted into the steel rod fixing holes 12 (see FIGS. 6(a) and 6(b)), a predetermined gap of a predetermined width is maintained around the entire circumference between the inner circumferential surface of the steel rod fixing hole 12 and the hollow steel rod 22. In each steel rod fixing hole 12, the gap between the inserted hollow steel rod 22 is filled with the filling hardener 14 injected through the hollow steel rod 22 and hardened, thereby fixing the base plate 20 with the hollow steel rod 22 attached to the upright lower end 11a of the wooden pillar 11 as a whole (see FIG. 7).

[0023] Preferably, the wooden post 11 has a rectangular cross-sectional shape (see FIG. 2), and the metal base plate 20 has a rectangular planar shape that is slightly larger than the rectangular cross-sectional shape of the wooden post 11 (see FIG. 3(a)). The base plate 20 has a plurality of tapped holes 24 arranged in a rectangular ring shape, corresponding to the positions of the plurality of steel rod fixing holes 12 drilled and formed in the wooden post 11, and a positioning protrusion 23 is provided in the inner region surrounded by the plurality of tapped holes 24 arranged in a rectangular ring shape, corresponding to the positions of the positioning fitting holes 13 in the wooden post 11. Bolt fastening holes 21 for fastening anchor bolts 31 are formed in the outer region of the plurality of tapped holes 24 arranged in a rectangular ring shape.

[0024] Furthermore, preferably, the positioning fitting hole 13 is a fitting hole with a circular cross-sectional shape formed in the center part of the lower end surface 11b of the wooden pillar 11 (see Figure 2), and the positioning protrusion 23 is a protrusion with a circular cross-sectional shape protruding from the center part of the inner area surrounded by multiple tapped holes 24 arranged in a rectangular ring shape (see Figures 3(a) and (b)).

[0025] Furthermore, preferably, a plurality of screw holes 25 are formed in the inner region of the base plate 20, which is surrounded by the plurality of tap holes 24, and fixing screws or fixing nails (preferably fixing screws in this embodiment) 28 are driven through these screw holes 25 toward the lower end surface 11b of the wooden post 11 (see Figure 7).

[0026] In this embodiment, the wooden column 11, whose lower end 11a is provided with the joint structure 10, is made of, for example, laminated veneer lumber (LVL) and is obtained using a large-section timber having a rectangular (square) cross-section, preferably measuring approximately 350 mm to 540 mm in length and width, and is formed to have a length of approximately 6 to 12 m, corresponding to a predetermined floor height. As shown in Fig. 2, a plurality of steel rod fixing holes 12, each with an inner diameter of approximately 30 mm, are drilled in the lower end surface 11b of the wooden column 11, at a pitch of approximately 60 mm, along an imaginary rectangular loop measuring, for example, approximately 420 mm in length and width, extending parallel to one another from the lower end surface 11b upward in the axial direction of the wooden column 11, to a drilling depth of, for example, approximately 380 to 680 mm. In addition, in the center of these inner areas surrounded by multiple steel rod fixing holes 12 arranged in succession along a rectangular virtual ring line, a positioning fitting hole 13 having a circular hollow cross-sectional shape with an inner diameter of, for example, about 32 mm is formed to a depth of, for example, about 75 mm in the axial direction of the wooden pillar 11.

[0027] 3(a) and 3(b), the base plate 20, which constitutes the joint structure 10 together with the plurality of steel rod fixing holes 12 formed in the wooden pillar 11, is made of a metal plate member, for example, a steel plate with a thickness of about 36 mm, and preferably has a rectangular (square) planar shape, for example, about 700 mm in length and width, which is slightly larger than the rectangular cross-sectional shape of the wooden pillar 11. A circular fitting hole 23a with an inner diameter of about 32.5 mm is formed in the center of the base plate 20, and a cylindrical steel positioning protrusion 23 with a diameter of about 32 mm is attached by fitting its base end into this circular fitting hole 23a and, for example, welding it to the other surface 20b of the base plate 20, so that it protrudes by a length of, for example, about 70 mm from the top surface.

[0028] In addition, the base plate 20 has a plurality of tapped holes 24 with a screw diameter of about M24 for screwing in hollow steel rods 22, which correspond to the plurality of steel rod fixing holes 12 that are drilled and arranged in a rectangular ring shape on the lower end surface 11b of the wooden pillar 11.The tapped holes 24 are arranged in a rectangular ring shape at a pitch of, for example, about 60 m around the outer periphery of the positioning protrusion 23, along a rectangular virtual ring line similar to the virtual ring line along which the steel rod fixing holes 12 are arranged.

[0029] Furthermore, in the base plate 20, outside the multiple tap holes 24 arranged in a rectangular ring, in an area that protrudes from the lower end surface 11b of the erected lower end portion 11a when joined to the wooden pillar 11, multiple bolt fastening holes 21 are formed as joining means 26 to fasten to anchor bolts 31 protruding from the concrete surface 30a of the upper surface of the reinforced concrete slab 30, and these holes correspond to the positions from which the multiple anchor bolts 31 protrude at each joining point where the wooden pillar 11 is erected.

[0030] Furthermore, the base plate 20 has four screw holes 25 formed in an inner region surrounded by the multiple tapped holes 24 arranged in a rectangular ring, each positioned at a corner of a virtual ring line of a smaller rectangle. Hollow steel rods 22 are inserted into the multiple steel rod fastening holes 12 of the wooden post 11, and with the upper surface 20b of the base plate 20 in close contact with the lower end surface 11b of the standing lower end portion 11a, fixing screws 28 are preferably driven into the multiple screw holes 25 at these four locations, thereby firmly attaching the base plate 20 to the lower end surface 11b of the standing lower end portion 11a as a unit while preventing misalignment in the rotational direction relative to the lower end surface 11b.

[0031] Furthermore, gap-filling adhesive 27 can be preferably applied to the upper surface 20b of base plate 20, with the application range being, for example, the area inside a virtual rectangular ring line in which screw holes 25 are formed at each of the four corners. This makes it possible to bond the base plate 20 integrally to the lower standing end 11a of the wooden post 11 with the upper surface 20b of base plate 20 in close contact with the lower end surface 11b of the lower standing end 11a in a more stable state.

[0032] The hollow steel rods 22 are attached to the base plate 20 with one end opening 22a facing the underside 20a of the base plate 20 and the other end opening 22b extending upright from the upper surface 20b of the base plate 20. These rods may be cylindrical steel rods with a hollow interior through which the fluid filling solidification agent 14 can flow, which are known as connector members used in the GIR method. The hollow steel rods 22 have an outer diameter of, for example, about 24 mm, and preferably have a male thread ridge formed on their outer circumferential surface. The hollow steel rods 22 have their base ends screwed into the respective tapped holes 24, so that one end opening 22a faces the underside 20a of the base plate 20, and the other end opening 22b is attached to the base plate 20 by standing upright from the upper surface 20b, extending parallel to each other and perpendicular to the base plate 20, with a length of, for example, approximately 350 to 650 mm, which is slightly shorter than the drilling depth of the steel rod fixing holes 12 formed in the wooden pillars 11.

[0033] Each of the hollow steel rods 22 attached to the base plate 20 is inserted into a corresponding one of the steel rod fixing holes 12 in the wooden column 11, and the base plate 20 is attached to the upright lower end 11a of the wooden column 11 with the upper surface 20b of the base plate 20 in close contact with the lower end surface 11b of the upright lower end 11a. Then, a known filling hardener 14, such as epoxy resin, is injected into the base plate 20 from one end opening 22a facing the underside using a known adhesive injection gun used in the GIR method. The injected fluid filling hardener 14 passes through the hollow interior of the hollow steel rod 22 and is discharged from the other end opening 22b inserted into the steel rod fixing hole 12, thereby filling the steel rod fixing hole 12 from its deepest part to the gap between the hollow steel rod 22 and the outer surface of the hollow steel rod 22 over the entire circumference and length. As the filling solidification agent 14 filled in the steel rod fixing hole 12 solidifies, a joint structure 10 is obtained in this embodiment in which a base plate 20 having a hollow steel rod 22 is joined integrally to the upright lower end 11a of the wooden pillar 11, and the wooden pillar's upright lower end to the concrete surface.

[0034] The joint structure 10 of the above-mentioned lower end of the wooden pillar to the concrete surface, in which the base plate 20 having the hollow steel rod 22 is integrally joined to the lower end 11a of the wooden pillar 11, can be easily and accurately formed as follows, for example, in a manufacturing factory for the wooden pillar 11, by the above-mentioned fastening hole drilling process, steel rod fixing process, and base plate integration process.

[0035] Specifically, in the fastening hole drilling process, preferably at a manufacturing plant for the wooden pole 11, a wooden block timber, preferably having a rectangular cross-section of a predetermined size, serving as the raw material for the wooden pole 11, is placed sideways on a work platform, for example. An operator operates a drilling device while facing the lower end surface 11b of the lower end portion 11a, which faces sideways. This allows for easy and accurate drilling of multiple steel rod fastening holes 12 at predetermined positions and to a predetermined drilling depth. After the multiple steel rod fastening holes 12 are drilled in the lower end surface 11b of the lower end portion 11a, as shown in Figures 4(a) and 4(b), a base plate 20 with protruding positioning protrusions 23 is placed along the lower end surface 11b of the lower end portion 11a (the end surface of the wooden pole 11) while fitting the positioning protrusions 23 into the positioning fitting holes 13. It is then confirmed that the holes are tightly fitted together.

[0036] Subsequently, in the steel rod fixing process, as shown in FIG. 5 , the base ends of the hollow steel rods 22 are screwed into the tapped holes 24 of the base plate 20, with one end opening 22a facing the lower surface 20a of the base plate 20 and the other end openings 22b standing perpendicular to and parallel to the upper surface 20b of the base plate 20. After the hollow steel rods 22 are set, they are visually inspected to ensure that they are standing at a predetermined length and that they are not tilted or inclined. Furthermore, a gap-filling adhesive 27, such as an epoxy resin, is applied, if necessary, to the area inside the imaginary rectangular loop where the screw holes 25 are formed at the four corners to fill the gap between the lower end surface 11b of the standing lower end 11a and the upper surface 20b of the base plate 20.

[0037] Furthermore, as a base plate integration process, as shown in Figures 6(a) and (b), a base plate 20 having a plurality of hollow steel rods 22 erected against the lower end surface 11b of the vertical lower end portion 11a of a wooden pillar 11, which is laid on its side and has a plurality of steel rod fixing holes 12 formed therein, is slid laterally toward the lower end surface 11b of the vertical lower end portion 11a so that each hollow steel rod 22 is inserted into the steel rod fixing holes 12, and the other surface 20b, which will be the upper surface of the base plate 20, is tightly attached to the lower end surface 11b of the vertical lower end portion 11a, while positioning the hollow steel rods 22 by fitting the positioning protrusions 23 into the positioning fitting holes 13 in the lower end surface 11b of the vertical lower end portion 11a.

[0038] After the base plate 20 is attached to the wooden post 11 by adhering it to the lower end surface 11b of the lower end portion 11a, as shown in Fig. 7, the base plate can be fixed to the lower end surface 11b of the wooden post 11 while preventing rotational misalignment with the lower end surface 11b of the lower end portion 11a by driving, for example, fixing screws 28 into the four screw holes 25 described above toward the lower end surface 11b. Furthermore, by facing the lower end surface 11b of the lower end portion 11a of the wooden post 11 that has been laid on its side, a worker can easily inject a filling hardener 14, such as an epoxy resin, into the steel rod fixing hole 12 using a known adhesive injection gun through one end opening 22a of the hollow steel rod 22 that protrudes toward one surface 20a of the fixed base plate 20. As described above, the injected fluidized filling and solidifying agent 14 passes through the hollow interior of the hollow steel rod 22 and is discharged from the other end opening 22b inserted into the steel rod fixing hole 12, so that it smoothly fills the entire steel rod fixing hole 12 from the deepest part of the steel rod fixing hole 12, into the gap between the outer surface of the hollow steel rod 22 and over the entire circumference and length. In addition, as the filled filling and solidifying agent 14 solidifies, it becomes possible to easily obtain the above-mentioned joint structure 10 using the GIR method.

[0039] The wooden pillar 11, which has the joint structure 10 pre-installed at the lower upright end 11a as described above, is preferably transported from a manufacturing factory to a construction site, and at the construction site, as a wooden member joining process, it is erected on a concrete surface 30a, which is the upper surface of a reinforced concrete slab 30, which is the surface to be joined, as shown in Figures 8(a) to (c), and can be smoothly joined as a single unit while standing upright from the concrete surface 30a.

[0040] That is, at a construction site where the wooden member joining process is carried out, the upper ends of embedded anchor bolts 31 protrude from positions corresponding to the bolt fastening holes 21 formed in a rectangular ring shape in the base plate 20 at the joining point on the concrete surface 30a of the joined surfaces, for example, the top surface of a reinforced concrete slab 30, and a leveling board 32 made of, for example, steel or mortar is installed in the inner area of ​​the upper end portions of the connected anchor bolts 31 (see FIGS. 8(a) and 8(b)). The transported wooden pillar 11 is lifted using a heavy lifting machine such as a crane and erected at the joining point on the upper surface of the slab 30, and the upper ends of the anchor bolts 31 are inserted into each of the bolt fastening holes 21 formed in a rectangular ring shape in the base plate 20, and the inner area surrounded by the bolt fastening holes 21 in the base plate 20 is placed on the upper surface of the leveling board 32. By placing the base plate 20 on the upper surface of the level adjustment board 32, the height position of the wooden pillar 11 can be adjusted and interference between one end opening 22a of each of the multiple hollow steel rods 22 protruding downward from the lower surface 20a of the base plate 20 and the concrete surface 30a caused by the upper surface of the slab 30 can be avoided.

[0041] The base plate 20 is placed on the top surface of the level-adjusting board 32, and the wooden pillar 11 is erected. Then, a nut member, for example, is screwed onto the upper end of the anchor bolt 31 inserted into each bolt fastening hole 21 to fasten the anchor bolt 31 to the base plate 20. At the same time, the gap between the underside 20a of the base plate 20 and the concrete surface 30a, which is held on the outer periphery of the level-adjusting board 32, is filled with, for example, mortar as a filling and solidifying material 33 and allowed to harden (see Figure 8(c)). This makes it possible to erect the wooden pillar 11 from the concrete surface 30a, which is formed by the upper surface of the reinforced concrete slab 30, for example, and join it in a stable state.

[0042] As a result, according to the method for joining wooden members to a concrete surface using the GIR method of this embodiment having the above-mentioned configuration, at the construction site, the wooden member, wooden pillar 11, can be erected in a predetermined position on the top surface of the reinforced concrete slab 30, and the simple task of fastening the anchor bolt 31 to the base plate 20 makes it possible to easily join the wooden pillar 11 in an upright position to the concrete surface 30a.In addition, the work of filling the steel rod fixing holes with a filling and solidifying agent can be carried out in advance at a manufacturing plant for the wooden pillar 11, etc., making it possible to easily fix the hollow steel rod as a single unit inside the steel rod fixing holes in a stable state.

[0043] The present invention is not limited to the above-described embodiment and various modifications are possible. For example, the method for joining wooden members to concrete surfaces of the present invention can be used not only to join wooden columns to the top surface of a reinforced concrete slab, but also to join the end of a wooden beam to a vertical concrete surface such as a reinforced concrete wall or column using the GIR method. Wooden members, such as wooden columns, do not necessarily have to have a rectangular cross-sectional shape and may have various other cross-sectional shapes, such as a circular or polygonal shape. The base plate may have various other planar shapes, such as a circular or polygonal shape, that are slightly larger than the joining end surface of the wooden member. The joining means provided in the base plate do not necessarily have to be multiple bolt fastening holes for securing anchor bolts. [Explanation of symbols]

[0044] 10 Joint structure of the lower end of a wooden pillar to the concrete surface 11 Wooden pillars (wooden components) 11a Standing bottom end 11b Bottom end surface 12 Steel bar fixing hole 13 Positioning fitting hole 14 Filling solidifier 20 base plate 20a One side (bottom) 20b Other side (top) 21 Bolt fastening hole 22 hollow steel rod 22a One end opening 22b Other end opening 23 Positioning protrusion 23a Circular mounting hole 24 tapped holes 25 screw holes 26 Joining means 27 Gap-filling adhesive 28 Fixing screw 30 Reinforced concrete slab 30a Concrete surface (top of slab) 31 Anchor bolt 32 Level adjustment machine 33 Filling and solidification material

Claims

1. A method for joining wooden members to concrete surfaces using the GIR method, in which a hollow steel rod is inserted into a steel rod fixing hole drilled and formed in the wooden member, and a filling and solidifying agent is filled into the steel rod fixing hole through the inserted hollow steel rod and solidified to join the members together, a fastening hole drilling step of drilling and forming a plurality of steel rod fastening holes into which the hollow steel rods are inserted and fastened on the joint end surfaces of the wooden members; a steel rod fixing process in which a plurality of hollow steel rods are fixed to a metal base plate having a planar shape slightly larger than the joint end surface of the wooden member at positions corresponding to the plurality of steel rod fixing holes on the joint end surface of the wooden member, with the end opening of one end facing one surface and the end opening side of the other end standing upright from the other surface; a base plate integration process in which the base plate, on which the hollow steel rods are erected, is fixed integrally to the joint end surface of the wooden member by inserting each of the hollow steel rods into the steel rod fixing holes and bringing the other surface into close contact with the joint end surface of the wooden member, and then injecting and filling the filling and solidifying agent into each of the steel rod fixing holes through the end opening at one end facing the one surface, via the hollow steel rod, and solidifying the agent; and a wooden member joining step in which the base plate, fixed integrally to the joining end face of the wooden member, is joined to the concrete surface to be joined via joining means provided on the portion of the base plate that protrudes from the joining end face of the wooden member, thereby joining the wooden member to the concrete surface as a single unit.

2. 2. A method for joining a wooden member to a concrete surface as described in claim 1, wherein the wooden member is a wooden pillar, the joining end surface of the wooden member is the lower end surface of the wooden pillar, and the concrete surface is the upper surface of a concrete slab.

3. A method for joining wooden members to a concrete surface as described in claim 2, wherein the wooden post has a rectangular cross-sectional shape, and the metal base plate has a rectangular planar shape that is one size larger than the rectangular cross-sectional shape of the wooden post.

4. 3. A method for joining a wooden member to a concrete surface as described in claim 1 or 2, wherein the joining means provided on the portion of the base plate that protrudes from the joining end face of the wooden member is a plurality of bolt fastening holes formed in the protruding portion for fastening anchor bolts that protrude from the concrete surface and are embedded therein.

5. 3. A method for joining wooden members to a concrete surface according to claim 1 or 2, wherein the fixing hole drilling process, the steel rod fixing process, and the base plate integration process are carried out at a manufacturing plant for the wooden members, and the wooden member joining process is carried out at a construction site to which the wooden members with the base plate fixed have been transported.

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