JP2018197474A - Joint structure of wall member and foundation - Google Patents

Abstract

To provide a joint structure of a wall member and a foundation which saves a labor required for fixing work of driving many screws into a steel panel for fixing a base to a wall member, which has no positional deviation of an anchor bolt for avoiding an interference with the screw, and in which splitting does not occur even when bending acts on a base in an earthquake.SOLUTION: A joint structure of a wall member and a foundation comprises: a column base steel plate 3 whose lower side portion 3a is buried in and fixed to a foundation 2 and whose upper side portion 3b is exposed from a top face 2a of the foundation 2; a wall member 4 including a slit 4c formed upward from an opening of a bottom face so as to store the upper side portion 3b of the column base steel plate 3 which is exposed from the top face 2a of the foundation; an attachment pin hole 3c formed in the upper side portion 3b of the column base steel plate 3; a wall pin hole 4d formed with penetrating the slit 4c of the wall member 4 in a perpendicular direction; and a fastener 5 penetrating the attachment pin hole 3c and the wall pin hole 4d and fastening the column base steel plate 3 to the wall member 4.SELECTED DRAWING: Figure 1

Description

  The present invention mainly relates to a joint structure between a wall member such as a CLT panel and a foundation in a wooden house.

  As is well known, CLT (Cross Laminated Timber) is a thick panel in which the layers of the board are laminated and bonded so that each layer is orthogonal to each other, and is established by the name of the orthogonal laminated board as Japanese Agricultural Standard (JAS). Although it is also used as a building material such as a wall material, a floor material, and a ceiling material, CLT itself is also a pillar and a beam. However, since the history of panel construction using CLT has not been long in Japan, the actual situation is that joints with building components have not yet been fully developed. About the joining method of this CLT and a foundation, as shown in FIG. 9 and FIG. 10, the ventilation spacer 33 is installed on the base 32 fastened with the foundation 31 with the anchor bolt 30, similarly to the conventional wooden shaft structure. In the publication, the CLT panel 34 is installed, and the foundation 31 and the CLT panel 34 are sandwiched from both sides by an external steel plate 35 and fixed with a large number of screws 36. However, it is known as an actual construction method.

  In addition, as shown in FIG. 2 of Patent Document 1, as a construction method in which the structure / heat insulation panel is directly installed on the foundation without using a base, the plate fixed to the anchor reinforcing bar embedded in the foundation is viewed from the side of the foundation. A structure is disclosed that protrudes above the foundation and is fixed with a wall panel and a nail. Moreover, as shown in FIG. 1 of Patent Document 2, a wall panel is placed on a ventilation pedestal placed on the upper surface of the foundation, and the upper end of the anchor bolt embedded in the foundation is placed in the lower end of the wall panel. A structure that protrudes and is fixed by screwing with a screw is disclosed.

Japanese Patent Laid-Open No. 11-13149 JP 2009-97215 A

  However, according to the prior art described in the above-mentioned unpublished documents, it takes a lot of labor to install the base 32 and to fix the base 32 and the steel panel 35 for fixing the CLT panel 34 with a large number of screws 36. There is a problem. Furthermore, there is a problem in that the position must be shifted in order to avoid interference between the anchor bolt 30 passing through the base 32 and the screw 36. In addition, there is a problem in that bending is applied to the base 32 during the earthquake, resulting in splitting. In addition, since the CLT panel 34 is installed on the base 32, the anchor bolt 30 buried in the base 31 for fixing the base 32 and the main bar 37 of the base 31 are both arranged in the center of the material. As a result, there is a problem that the base 32 is bent.

  In order to solve the problem of installing the CLT panel 34 on the base 32 as described above, a technique of placing a wall member directly on the foundation described in Patent Document 1 or Patent Document 2 described above is used. However, in the invention described in Patent Document 1, the plate fixed to the anchor reinforcing bar embedded in the foundation is protruded from the side of the foundation to the upper side of the foundation and fixed with the wall panel and the nail. Due to the structure, there is a problem that the supporting force is weak and it is difficult to withstand the action of an earthquake or a lateral force. In the invention described in Patent Document 2, a wall panel is placed on a ventilation pedestal placed on the upper surface of a foundation, and the upper end of an anchor bolt embedded in the foundation is projected into the lower end of the wall panel. Since the structure is screwed and fixed with screws, the connection between the foundation and the wall panel is only anchor bolts, and there is a problem that the connection strength is weak.

The present invention has been made to solve the above-mentioned problems, and its means is as follows:
The lower side is embedded in the foundation and fixed, and the upper side is exposed from the surface of the foundation, and the upper side exposed from the foundation surface of the column base is directed upward from the bottom opening. A wall member having a slit formed therein, a mounting pin hole formed in an upper side portion of the column base steel plate, a wall pin hole formed by penetrating the slit of the wall member in a right angle direction, and the mounting pin hole And a fastener that passes through the wall pin hole and fastens the column base steel plate and the wall member.

  Further, the wall member is a CLT panel. Furthermore, a plurality of pairs of the column base steel plates and the slits of the wall member are provided in the width direction of the foundation. Furthermore, a ventilation spacer is interposed between the upper surface of the foundation and the bottom surface of the wall member. Further, a pile rod is fixed below the column base steel material.

  Further, the fastener is a drift pin. The fastener is a bolt or a nut. The wall member is a wall material that also serves as a pillar. A plurality of pairs of column base steel plates and wall member slits are installed in the longitudinal direction of the foundation.

  According to the joining structure of the wall member and the foundation of the present invention, the upper end side portion of the column base steel plate in which the lower end side portion is embedded and fixed to the foundation is housed in the slit from the opening on the bottom surface of the wall member, Are surrounded by wall members, so that the fixing pins such as drift pins and bolts that pass through and fix to the mounting pin holes of the column base steel plates and the wall pin holes of the wall members are pillars caused by large vertical vibrations during an earthquake. Since the base plate is not required because it prevents the leg steel plate from coming off the wall member and is directly connected to the foundation, splitting due to bending of the base during an earthquake does not occur. Furthermore, the fastener only has to be penetrated or driven so as to reach the wall pin hole on the other surface from the wall pin hole on one surface of the wall member through the mounting pin hole of the column base steel plate. Since there is no need to penetrate or drive the fastener from both sides, it is possible to reduce the installation effort. In addition, since the foundation and the wall member are inserted into the slit from the opening portion opened in the longitudinal direction of the foundation on the bottom surface of the wall member, the upper side portion of the column base steel plate protruding from the top surface of the foundation is inserted. Compared to the joint structure of the prior art in which the metal panel protruding upward from the side is fixed with the nails on both sides of the wall panel, it has a strong support force and can sufficiently withstand the action of an earthquake or a lateral force. In addition, the connection strength between the foundation and the wall panel is increased, unlike the prior art in which only anchor bolts are used.

  When the wall member is a wall material that also serves as a column like a CLT panel, it is not necessary to provide a separate column or wall material, and the construction is simple. Further, since it is a CLT panel, the interior side can be exposed to the room as it is, so that the cost of interior materials can be saved. Furthermore, since it also has a function as a structural material, it can also function as a pillar, and the structure of the building can be simplified.

  In the case where a plurality of slits of the column base steel plates and column base steel plates are provided in the width direction of the foundation, the joint strength between the foundation and the wall member increases accordingly. In addition, since the portion embedded in the foundation on the lower side of the column base steel plate can be removed from the position of the main bar installed at the center in the longitudinal direction of the foundation, interference can be avoided, so the position of the main bar to the base is changed. There is nothing, so the strength can be maintained.

  By interposing a ventilation spacer between the upper surface of the foundation and the bottom surface of the wall member, air circulation in the underfloor space can be improved. Moreover, it is not necessary to provide an opening for air circulation on the bottom surface of the wall member.

  When a pile rod is fixed below the column base steel, the pile rod is embedded and fixed in the concrete of the foundation. Can be maintained.

  When the fastener is a drift pin, it is only necessary to hit the drift pin with a hammer from a wall pin hole opened on one side of the wall member so that it reaches the opposite wall member, so that installation is easy. is there. The wall pin hole in this case is approximately the same as the diameter of the drift pin. When the fastener is a bolt or nut, the bolt is inserted from the wall pin hole opened on one side of the wall member until it comes out of the wall pin hole of the opposite wall member, and is fastened and fixed with the nut. The work is simple because it is only necessary. Further, when removing the wall member, it is easy because it is an operation of simply loosening the nut and pulling out the bolt.

  In the case where a plurality of pairs of column base steel plates and wall member slits are installed in the longitudinal direction of the foundation, the joining and fixing structure between the foundation and the wall member can be stronger and stabilized.

The perspective view just before joining of the wall member and foundation of embodiment of this invention AA line sectional view of FIG. The perspective explanatory view of the state where the wall member and the foundation of this invention are joined BB sectional view of FIG. The perspective view just before joining of the wall member and foundation of other embodiment of this invention CC sectional view of FIG. The perspective explanatory view of the joined state of the wall member and the foundation of another embodiment of the present invention DD cross section of FIG. Perspective explanatory view of the joining state of the wall member and the foundation of the conventional example EE sectional view of FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a wall member / foundation joint structure according to the present invention will be described below with reference to FIGS. First, the wall member-foundation joint structure 1 according to the first embodiment will be described with reference to FIGS. The wall member / foundation joining structure 1 includes a column base steel plate 3 in which a lower side portion 3 a is embedded and fixed to a foundation 2 and an upper side portion 3 b is exposed from an upper surface 2 a of the foundation 2, and a foundation surface 2 a of the column base steel plate 3. Formed on the CLT panel 4 as a wall member having a slit 4c formed upward from the opening 4b of the bottom surface 4a to accommodate the exposed upper side 3b, and the upper side 3b of the column base steel plate 3. A wall pin hole 4d formed by penetrating the mounting pin hole 3c and the slit 4c of the CLT panel 4 in a right angle direction, and a fastener 5 for fastening through the mounting pin hole 3c and the wall pin hole 4d. It has.

  The foundation 2 has a main bar 6 and other reinforcing bars arranged at the center, and the periphery is solidified with concrete 7 and formed into a predetermined shape, and the upper surface 2a has a predetermined width. A ventilation spacer 8 having a predetermined thickness is placed on the upper surface 2a of the base 2 in the longitudinal direction with a predetermined interval.

  The column base steel plate 3 is made of a rectangular vertically long metal thin plate, the lower side portion 3 a is embedded in the concrete 7 of the foundation 2, and the upper side portion 3 b protrudes from the upper surface 2 a of the foundation 3. The lower side portion 3a is formed with a plurality of through-holes 3d for introducing the concrete 7 to improve the engagement after hardening and for improving the fluidity of the placed concrete. The upper side portion 3b A plurality of mounting pin holes 3c for fastening the column base steel plate 3 to the CLT panel 4 are formed scattered in the vertical and horizontal directions. Two such column base steel plates 3 are arranged in parallel at a predetermined interval in the center in the width direction of the foundation 2 so that the upper side portion 3b protrudes by the same height, and if necessary, the foundation 2 Column base steel plates 3 are installed in the same manner with a predetermined interval in the longitudinal direction. This installation is done by attaching the column base steel plate 3 to the mounting guide of the metal anchor ruler (not shown) before placing the concrete on the concrete metal formwork in which the reinforcing bars such as the main reinforcement 6 are built, and after hardening the concrete This can be done by removing the metal anchor ruler and the metal formwork. The embedding length of the lower side portion 3a into the foundation 2 and the protruding length of the upper side portion 3b from the upper surface 2a of the foundation 3 are appropriately determined depending on the type and structure of the building. In this embodiment, the example in which the two column base steel members 3 are embedded in the width direction of the foundation 2 has been described. However, even if there is only one as described in the second embodiment, the wide foundation 2 is also wide. In the case of 3, it may be three or more. Furthermore, the size, shape, embedding length, protruding length, installation interval, etc. of the plurality of column base steel plates 3 to be installed are not limited to being uniform, but the structure of the building, the unbalanced load It can be appropriately changed depending on various factors such as a place where it is likely to be applied and a place where it is not. Furthermore, the metal type, outer shape, thickness of the metal thin plate, the number and size of the through holes 3d and the mounting pin holes 3e, and the like of the metal thin plate forming the column base steel plate 3 are appropriately selected and changed according to the structure of the building. Of course.

  As described above, the CLT panel 4 as a wall member is a thick panel in which the layers of a plate are laminated and bonded so that each layer is orthogonal to each other. For example, the length in the vertical and horizontal directions is 3000 mm and 2000 mm. It is also a structural member having both a rectangular pillar and a wall material. The CLT panel 4 is placed on the upper surface 2a of the foundation 2 with a ventilation spacer 8 interposed, and a gap is provided so that the air in the underfloor space communicates with the atmosphere. On the bottom surface 4 a of the CLT panel 4, an opening 4 b is opened to a slit 4 c that houses the upper side portion 3 b of the column base steel material 3 protruding from the top surface 2 a of the foundation 2. In this embodiment, since the two column base steel members 3 protrude in the width direction of the foundation 2, the grooves of the two slits 4 c are formed correspondingly, but the width of the slit 4 c is the column. The inner circumferential shape of the leg steel material 3 is substantially the same as the thickness of the leg steel material 3 and is substantially the same as the outer shape of the upper side portion 3 b of the column base steel material 3.

  When placing the CLT panel 4 on the upper surface 2a of the foundation 2, as shown in FIG. 1, the opening 4b of the lifted CLT panel 4 is positioned above the column base steel 3 from above the foundation 2. Then, the column base steel material 3 is accommodated in the slit 4c by gradually lowering as shown by the arrow a. The bottom surface 4a of one CLT panel 4 is provided with two slits 4c in parallel in the width direction at both ends in the lateral direction, so there are a total of four slits 4c. After the position of the opening 4b is adjusted so that all the column base steel 3 is stored, it is lowered and stored. In addition, the resin tape 9 is stuck on the outer peripheral surface of the lower end portion of the CLT panel 4 and the corner of the bottom surface 4a to protect it from inhaling rainwater.

  Further, since the wall pin hole 4d is formed at a position corresponding to the mounting pin hole 3c of the column base steel material 3 from the one outer surface where the slit 4c of the CLT panel 4 is formed toward the other outer surface, When the column base steel material 3 is stored in the slit 4c, the mounting pin hole 3c and the wall pin hole 4d are in a straight line and open. A drift pin or bolt as a fastener 5 is inserted into the pin holes 4d and 3c opened in a straight line in the direction indicated by an arrow B, and fixed, whereby the joining structure 1 to the foundation 2 of the CLT panel 4 as a wall member is obtained. Built. When the drift pin is used, it can be firmly fixed so that it does not come out even if a force in the direction of vibration or twist is applied by striking it with a hammer when inserting the drift pin from the opening of the wall pin hole 4d. Moreover, it is easy to fix because it is only necessary to hit the drift pin. Furthermore, by stopping the tip of the drift pin halfway so as not to protrude from the other side surface of the CLT panel 4, the side surface of the indoor CLT panel 4 can be kept clean. Similarly, when the fastener 5 is a bolt / nut, a bolt is inserted into the pin holes 4d, 3c opened in a straight line from one outer surface of the CLT panel 4 in the direction indicated by an arrow B and protruded from the other outer surface. It can be fixed by tightening a nut on the tip screw. In this case, the nut is exposed when the other outer surface is on the indoor side, but it can be visually confirmed that the fastening is securely performed. Further, when disassembling, the work is simple because it is only necessary to loosen the nut.

  A wall member-foundation joint structure 20 according to a second embodiment of the present invention will be described with reference to FIGS. The difference between the wall member and the foundation joint structure 1 of the first embodiment is that the number of column base steel members 3 is one and the number of slits 4c of the CLT panel 4 is also one accordingly. Instead of providing the through-hole 3d in the lower side portion 3a of the column base steel material 3, the pile rod 10 is fixed and thereby the column base steel material 3 is firmly embedded in the concrete 7 of the foundation 2. Other than these, the wall member and the basic joint structure 1 of the first embodiment are the same as those in the first embodiment, and the description thereof is omitted.

  The wall member / foundation joining structure 20 includes a column base steel plate 3 in which the lower side portion 3a is embedded and fixed to the foundation 2 together with the pile rod 10, and the upper side portion 3b is exposed from the upper surface 2a of the foundation 2, and the column base steel plate 3 CLT panel 4 having a slit 4c formed upward from opening 4b of bottom surface 4a to accommodate upper side 3b exposed from base surface 2a of the base, and upper side 3b of column base steel plate 3 A wall pin hole 4d formed by passing through the formed mounting pin hole 3c and the slit 4c of the CLT panel 4 in a right angle direction, and a fastener 5 for fastening through the mounting pin hole 3c and the wall pin hole 4d. Are provided.

  The column base steel material 3 is different from the column base steel material 3 of the first embodiment in that the pile rod 10 is fixed to the lower end of the lower side portion 3a of one column base steel material 3 by welding or the like and the lower side portion 3a It is embedded and fixed in the foundation 2 together with a part. The column base steel material 3 is fixed to the foundation 2 by the periphery of the pile bar 10 being hardened by the concrete 7. Therefore, the through hole 3d formed in the lower side portion 3a of the first embodiment is unnecessary, but it is more reliable if it is formed in the lower side portion 3a embedded in the concrete 7 of the foundation 2 slightly. Can be fixed. In this embodiment, there are two pile rods 10, but one or three or more may be used. The slit 4c of one CLT panel 4 corresponding to this one column base steel material 3 leads to one opening 4b opened in the longitudinal direction of the center in the width direction of the bottom surface 4a of the CLT panel 4, and is lifted up. The CLT panel 4 is lowered from above in the direction of arrow A in FIG. 5, and the opening 4 b is fitted into and stored in the upper side portion 3 b of the column base steel material 3. As a result, as in the first embodiment, the mounting pin holes 3c and the wall pin holes 4d of the column base steel members 3 are arranged in a straight line, and the fastener 5 is inserted in the direction of the arrow B from the side surface of one CLT panel 4 and fixed integrally. The The connecting and fixing with the drift pins or bolts and nuts is the same as described above, and will be omitted.

  The pile rod 10 is used by appropriately selecting the material, length, and thickness depending on the structure of the building, but a fixing plate 10a is provided at the lower end as shown well in FIGS. Since it has a resistance against the action of the pulling force and increases the contact area with the concrete 7, it can be firmly fixed. When the main reinforcement 6 of the foundation 2 is located at the center of the foundation 2 and the CLT panel 4 is installed at the center of the upper surface 2a, the reinforcement arrangement positions are shifted in order to avoid overlapping in the concrete 7. It is desirable.

  Since the CLT panel 4 is a CLT, the CLT panel 4 itself can be a structural material having strength. In these two embodiments, the CLT panel 4 functions as a column that supports an upper load and a role as a wall material. Is also used. Therefore, the embedding fixing position of the column base steel material 3 to the foundation 2 is determined so that the respective positions coincide with each other for the right angle joining of the CLT panel 4 at the corner portion of the foundation 2 and the planar joining of the adjacent sides in the lateral direction. . Since the wall member and the foundation joint structures 1 and 20 according to the present invention are for directly mounting and fixing the CLT panel 4 on the upper surface 2a of the foundation 2 without interposing a base, the structural members can be saved and the construction work can be saved accordingly. In addition to saving labor, it is possible to prevent the building from being distorted due to instability of the fixed state of the foundation. In the first and second embodiments of the present invention, the example in which the CLT panel is used as the wall member has been described. However, it is also possible to use a laminated material in which the laminated material is branched, a large cross-sectional column, or the like.

  Since the present invention is a joint structure to the foundation of the CLT panel as a wall material that also serves as a structural member that will be used more and more effectively in the future, it is effective for many new buildings, especially wooden houses and wooden collective houses. Expected to be utilized.

DESCRIPTION OF SYMBOLS 1,20 Joining structure 2 of wall member and foundation 2 Foundation 2a Upper surface 3 Column base steel material 3a Lower side part 3b Upper side part 3c Mounting pin hole 4 CLT panel (wall member)
4a Bottom 4b Opening 4c Slit 4d Wall pin hole 5 Fastener 6 Main reinforcement 7 Concrete 8 Venting spacer 9 Resin tape 10 Pile stick

The present invention has been made to solve the above-mentioned problems, and the means for this is the above-mentioned concrete of the foundation having a predetermined width on the upper surface, in which a reinforcing bar is arranged at the center, the periphery is solidified with concrete. lower side forming a plurality of through-holes are embedded and fixed in the column base steel sheet is upward side made of sheet metal which is exposed from the upper surface of the base, the upper exposed from the upper surface of the foundation of the columnar legs steel A wall member having a slit formed upward from the opening on the bottom surface to accommodate the side portion, a mounting pin hole formed in the upper side portion of the column base steel plate, and the slit of the wall member in a perpendicular direction A wall pin hole formed through the wall and a fastener for fastening the column base steel plate and the wall member through the mounting pin hole and the wall pin hole. It is in that.

Further, the wall member is a CLT panel. Furthermore, a plurality of pairs of the column base steel plates and the slits of the wall member are provided in the width direction of the foundation. Furthermore, a ventilation spacer is interposed between the upper surface of the foundation and the bottom surface of the wall member. Further, it lies in fixing the Kuibo below the column base steel plate.

When fixing the Kuibo below the column base steel plate, since the pile bars are embedded and fixed in the concrete of the foundation, even when fewer embedded and fixed portion of the basis for the lower side of column base steel sheet Strength can be maintained.

1,20 wall member and joining structure of the basic second basic 2a top 3 column base steel plate 3a lower side 3b upper side 3c mounting pin holes 4 CLT panel (wall member)
4a Bottom 4b Opening 4c Slit 4d Wall pin hole 5 Fastener 6 Main reinforcement 7 Concrete 8 Venting spacer 9 Resin tape 10 Pile stick

Claims (9)

  The lower side is embedded in the foundation and fixed, and the upper side is exposed from the surface of the foundation, and the upper side exposed from the foundation surface of the column base is directed upward from the bottom opening. A wall member having a slit formed therein, a mounting pin hole formed in an upper side portion of the column base steel plate, a wall pin hole formed by penetrating the slit of the wall member in a right angle direction, and the mounting pin hole And a fastener for penetrating the column base steel plate and the wall member through the wall pin hole, and a joining structure of the wall member and the foundation.   The wall member-foundation joint structure according to claim 1, wherein the wall member is a CLT panel.   3. The wall member-foundation joint structure according to claim 1 or 2, wherein a plurality of pairs of the column base steel plates and the wall member slits are provided in the width direction of the foundation.   The wall member / foundation joining structure according to any one of claims 1 to 3, wherein a ventilation spacer is interposed between the upper surface of the foundation and the bottom surface of the wall member.   5. The wall member-foundation joint structure according to claim 1, wherein a pile bar is fixed below the column base steel material.   The wall member-foundation joint structure according to any one of claims 1 to 5, wherein the fastener is a drift pin.   The said fastener is a volt | bolt and a nut, The joining structure of the wall member and foundation as described in any one of Claim 1 thru | or 5 characterized by the above-mentioned.   The wall member-foundation joint structure according to any one of claims 1 to 7, wherein the wall member is a wall material also used as a pillar. The wall member-foundation joint structure according to any one of claims 1 to 8, wherein a plurality of pairs of column base steel plates and wall member slits are installed in the longitudinal direction of the foundation.

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