JP2018178612A - Foundation structure of building and supporting member of anchor bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foundation structure capable of suppressing damage in the periphery of the an anchor bolt against horizontal force acting on an anchor bolt in a foundation.SOLUTION: An anchor bolt 1 is connected with a plate member 21 extending in a direction crossing the axial direction of the anchor bolt. The plate member 21 comprises a downward extending member 24 extending downwardly. The plate member 21 and the downward extending member 24 are embedded in a rising portion 11 of the foundation 10 without being exposed. The plate member 21 of a supporting member 2 is extended, on the basis of an outside surface where covering depth of the rising portion 11 with respect to the anchor bolt 1 becomes the minimum, in a direction in which a distance from the outside surface to the downward extending member 24 is longer than a distance from the outside surface to the anchor bolt 1.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a foundation structure of a building and a support member of an anchor bolt used for the foundation structure.

  On the foundation of a building such as a house, anchor bolts are embedded for securing upper structures such as column bases and foundations to reinforced concrete foundations. When an earthquake occurs, the entire building shakes, and vertical force (tensile force) and horizontal force (shear force) act on anchor bolts embedded in the foundation. At this time, the fixing force between the anchor bolt embedded in the foundation and the concrete constituting the foundation resists the vertical direction force and the horizontal direction force.

  However, when a large horizontal force or the like acts on the building due to a large earthquake or the like, the horizontal force acts on the anchor bolt 91 connected to the upper structure to press the foundation 92 as shown in FIG. There is a concern that the concrete constituting the foundation 92 may be cracked or spalled on the surface of the concrete.

  In the past, in order to prevent the occurrence of breakage on the foundation, measures have been proposed to reinforce the anchor bolt or place a welded wire mesh or reinforcing bar at a site that is prone to cracking, but even large earthquakes have been envisioned In many cases, it is not a thing, and construction labor, material cost, etc. are expensive.

  Patent Document 1 discloses a configuration in which an anchor bolt provided with a horizontal arm projecting in parallel with the longitudinal direction of the cloth base is embedded in a corner of the cloth base. In such a configuration, it is intended to suppress deformation of the anchor bolt and to make it difficult for breakage of the foundation to occur by receiving horizontal force acting on the anchor bolt with the horizontal arm.

Japanese Utility Model Publication No. 02-101828

  Although the technique described in Patent Document 1 attempts to receive the horizontal force acting on the anchor bolt by dispersing it to the horizontal arms extending in two directions, the size and shape of the foundation, and the arrangement of the anchor bolt Depending on the configuration, there is a possibility that the horizontal arms can not have a sufficient length or the horizontal arms may interfere with each other.

  Considering the occurrence of a large earthquake, it is assumed that a large horizontal force acts on the anchor bolt embedded in the foundation and a phenomenon occurs in which the anchor bolt is pressed in the horizontal direction (horizontal direction). At this time, in the conventional foundation structure, it is considered that breakage is likely to occur in a portion where the covering thickness of the foundation concrete is small around the anchor bolt. Even if the building meets the prescribed earthquake resistance performance standards and its continued use is ensured, if the foundation of the building appearing in the appearance is damaged, it may cause anxiety to the residents and users of the building. Improvement measures were desired.

  In view of the above problems, the present invention can suppress the occurrence of breakage such as cracking or peeling around the anchor bolt even if a large horizontal force acts on the anchor bolt of the foundation. A foundation structure of a building and a support member of an anchor bolt used therefor are provided.

  The solution according to the invention for achieving the above objects presupposes a building foundation structure provided with anchor bolts at the rising of the foundation. As this foundation structure, a flat plate member extending in a direction intersecting the axial direction of the anchor bolt is coupled to the shaft portion of the anchor bolt, and the flat plate member is provided with a hanging member extending downward from the flat plate member. Then, the flat plate member and the hanging member are embedded without being exposed to the rising portion of the base, and the outer surface and the anchor bolt are referred to with the outer surface where the covering thickness of the rising portion with respect to the anchor bolt is minimized. The flat plate member is extended in a direction in which the distance between the outer side surface and the hanging member is larger than the distance.

  Due to this particular matter, even if a large horizontal force is applied to the anchor bolt, the anchor bolt and the flat plate member and the hanging member provided on the anchor bolt can resist the horizontal force, and around the anchor bolt, It is possible to suppress the occurrence of breakage such as cracking or peeling.

  More specifically, as the foundation structure of the building, the anchor bolt is embedded with a different covering thickness to one outer side surface of the rising portion and another covering outer surface opposite to the one. Preferably, the flat plate member is extended in a direction in which the covering thickness with respect to the anchor bolt is large.

  This makes it possible to secure the length of the flat plate member coupled to the anchor bolt, and to minimize possible damage to the outer surface of the anchor bolt with a small thickness.

  Further, in the basic structure, it is preferable that the flat plate member is configured to have a through hole through which the anchor bolt is inserted, and the flat plate member is connected above the axially intermediate portion in the embedded portion of the anchor bolt.

  Thus, the flat plate member and the depending member can be provided on the upper side of the embedded portion of the anchor bolt, and the load resistance of the anchor bolt can be more effectively enhanced.

  In the foundation structure, preferably, the flat plate member is configured such that an anchor bolt is coupled to one end in the longitudinal direction and a hanging member separate from the flat plate is coupled to the other end.

  As a result, the anchor bolt, the flat plate member, and the hanging member can be formed as individual members, and the combination of them makes it possible to configure the foundation structure in various forms.

  Further, in the foundation structure, it is preferable that the hanging member has a length such that a lower end of the hanging member reaches a transverse main bar disposed in a longitudinal direction of the rising portion. Thereby, the adhesiveness of the concrete base material which comprises a foundation, and a hanging member can be improved.

  Further, in the basic structure, the hanging member may be a rod-shaped member which is attached to penetrate the flat plate member and may have an uneven portion on the outer surface. Also in this case, it is possible to enhance the adhesion between the concrete base material forming the foundation and the hanging member.

  Further, in the foundation structure, the flat plate member is disposed above the horizontal reinforcement embedded in the longitudinal direction of the foundation of the rising portion, and the anchor bolt is disposed on the outdoor side of the horizontal reinforcement, and Preferably, the hanging member is disposed on the indoor side of the horizontal reinforcement.

  As a result, the anchor bolt, the flat plate member, and the hanging member can be effectively accommodated in the limited space in the rising portion of the base, and can be applied to various forms of the base.

  The support member of the anchor bolt used for the foundation structure is also within the scope of the technical idea of the present invention. That is, a support member for an anchor bolt having a flat plate member coupled to the anchor bolt and a hanging member attached to the flat plate member, wherein the flat plate member is a plate-like member and penetrates both ends in the longitudinal direction. The drooping member is a rod-like member, has an uneven portion on the outer surface, is coupled to the flat plate member through one of the through holes, and extends in a direction intersecting the flat plate member It is characterized by becoming.

  By this specific matter, the support member of the anchor bolt can be formed with a simple configuration of the flat plate member and the hanging member, and the productivity is high, the installation work is easy, and the support member can be widely applied. it can. The flat plate member is a plate-like body and can be attached by inserting the anchor bolt through the through hole, so the connection portion with the anchor bolt is small, and the flat plate member is disposed without inhibiting the pullout resistance and compression performance of the anchor bolt. be able to. Further, the hanging member is a rod-like member, and the attaching operation to the flat plate member is easy, and the adhesion with the concrete base material constituting the foundation can be enhanced by having the uneven portion.

  In the present invention, the anchor bolt of the base is provided with the support member, and the support member is provided with the flat member extending in the direction intersecting with the axial direction of the anchor bolt and the hanging member extending downward from the flat member. There is. As a result, the anchor bolt and the support member can resist horizontal force during an earthquake, etc., improve the shear resistance more than before, and prevent the occurrence of damage to the foundation around the anchor bolt. It becomes possible.

It is a longitudinal cross-sectional view which shows the foundation structure of the building which concerns on Embodiment 1 of this invention. It is a cross-sectional view based on XX of FIG. The support member used for the foundation structure of Embodiment 1 is shown, FIG. 3 (a) is a top view, FIG.3 (b) is a side view, FIG.3 (c) is based on the YY line of FIG.3 (b). FIG. 5 is a cross-sectional view showing another example of the foundation structure of Embodiment 1. FIG. It is a longitudinal cross-sectional view explaining the evaluation method of the shear strength when a horizontal direction force acts on an anchor bolt. It is the side view which looked at the foundation in FIG. 5 in the arrow mark Z5 direction. FIG. 7 (a) is a plan view, FIG. 7 (b) is a longitudinal sectional view, and FIG. 7 (c) is a direction of arrow mark Z7. It is the side view seen to. FIG. 8A is a plan view, FIG. 8B is a longitudinal sectional view, and FIG. 8C is a view taken in the direction of arrow mark Z8. It is a side view. It is a top view which shows the foundation structure of the building which concerns on Embodiment 2 of this invention. It is a longitudinal cross-sectional view which shows the foundation structure of FIG. It is a top view which shows the other example of the foundation structure of Embodiment 2. FIG. It is a longitudinal cross-sectional view which shows the foundation structure of FIG. It is a perspective view which shows the mode of the failure | damage of the conventional foundation.

  Hereinafter, a foundation structure of a building and a support member of an anchor bolt according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view showing a foundation structure of a building according to a first embodiment of the present invention, and FIG. 2 is a transverse sectional view shown by the line X-X in FIG.

  In this embodiment, among the direct foundations of reinforced concrete structure applied to a building such as a house, a foundation structure in a footing foundation such as a cloth foundation (continuous foundation) will be described as an example.

  The foundation 10 of the building according to the illustrated embodiment is one in which rising portions 11 are continuously provided above a footing portion (not shown). The anchor bolt 1 is embedded in the rising portion 11. An upper end portion of the anchor bolt 1 is disposed to protrude above the top end of the rising portion 11, and a shaft portion excluding the upper end portion is embedded in the rising portion 11 in the vertical direction. At the upper end portion of the anchor bolt 1, an upper structure such as a pillar base, a base or the like (not shown) is joined.

  On the foundation 10, various reinforcing bars such as base bars and the like, which extend in the longitudinal direction including the rising portions 11, are disposed. The anchor bolt 1 is disposed such that the concrete cover thickness t1 up to one outer side surface of the rising portion 11 and the concrete cover thickness t2 up to the other outer side surface opposite to the concrete are different thicknesses. It is done.

  In the drawing showing the vertical cross section of the foundation 10 including FIG. 1, the concrete constituting the rising portion 11 and the self-leveling material provided on the upper layer of this concrete and having self-smoothness are integrated without distinction. It shows.

  As shown in FIG. 2, in the corner where the foundation 10 is orthogonal, the horizontal main reinforcement 12 is disposed substantially at the center of the width of the rising portion 11, and the anchor bolt 1 is provided on the outdoor side of the horizontal reinforcement 12 ing. In this case, two anchor bolts 1 are equally disposed at the projecting corner portion.

  For example, two anchor bolts 1 are disposed at symmetrical positions with respect to a virtual line L1 connecting an outdoor corner (outer corner) of the outlet corner and an indoor corner (inward corner) There is. A lower end portion of each anchor bolt 1 is fixed to the concrete constituting the foundation 10 by attaching a fixing plate (not shown) or by providing a hook or the like.

  A support member 2 is attached to the anchor bolt 1 embedded in the rising portion 11. The support member 2 includes a flat plate member 21 coupled to the anchor bolt 1 and a hanging member 24 attached to the flat plate member 21.

  3 (a) to 3 (c) show the support member 2 of the anchor bolt 1, FIG. 3 (a) is a plan view, FIG. 3 (b) is a side view, and FIG. 3 (c) is FIG. It is YY line sectional drawing in b).

  The flat plate member 21 is a metal plate-like body, and is provided with through holes 22 and 23 at both end portions in the longitudinal direction. One through hole 22 is provided to insert the shaft of the anchor bolt 1. A tap (threading) corresponding to the shaft portion of the anchor bolt 1 is provided on the inner peripheral surface of the through hole 22. The other through hole 23 is a hole through which the hanging member 24 is inserted, and is formed to have a cylindrical inner peripheral surface.

  The hanging member 24 is a rod-like member, and has an uneven portion (not shown) on the outer surface. In the illustrated embodiment, the depending member 24 is a bolt-like member having a head 25 and is formed with a thread on the outer surface except the head 25. The projections and depressions on the outer surface of the hanging member 24 are not only threads but may be ribs, nodes, or a plurality of projections. The hanging member 24 is inserted through the through hole 23 into the flat plate member 21, and the fixing nut 26 is screwed to be coupled to the flat plate member 21. Thus, the hanging member 24 is extended in the direction orthogonal to the flat plate member 21.

  As shown in FIG. 3A, the flat plate member 21 is expanded in the planar direction around the through holes 22 and 23, and a portion between the through holes 22 and 23 is formed to be relatively narrow. There is. The size of the through holes 22 and 23 is formed to correspond to the outer diameter of the shaft portion of the anchor bolt 1 or the depending member 24 to be inserted. The flat plate member 21 may have any shape as long as it is a plate-like body provided with two through holes 22 and 23, and may have a rectangular shape elongated in plan view.

  As shown in FIG. 1, the support member 2 is attached to the shaft portion of the anchor bolt 1 and embedded in the rising portion 11 of the foundation 10. The flat plate member 21 can be inserted into the shaft portion of the anchor bolt 1 before concrete placement of the foundation 10, and can be attached to an appropriate position on the shaft portion of the anchor bolt 1. Since the through hole 22 of the flat plate member 21 is provided with a tap, the flat plate member 21 can be directly fixed to the shaft portion of the anchor bolt 1 without requiring a complicated operation.

  Thereby, the flat plate member 21 is horizontally coupled to the anchor bolt 1 extending in the vertical direction. A hanging member 24 is attached to the flat plate member 21 via the other through hole 23. The hanging member 24 extends parallel to the anchor bolt 1.

  As described above, the anchor bolt 1 is embedded in the rising portion 11 with the covering thickness t1 to one outer side surface and the covering thickness t2 to the other outer side surface opposite to this being different. There is. The flat plate member 21 of the support member 2 is attached to the shaft portion of the anchor bolt 1, and is extended in the direction in which the covering thickness (t 1, t 2) of concrete with respect to the anchor bolt 1 is large.

  In FIG. 1, the flat plate member 21 is attached to the anchor bolt 1 so as to extend in the direction of the covering thickness t2. The hanging member 24 is embedded at a position as far as possible from the outer side surface (the outer side surface which becomes the covering thickness t1) in which the covering thickness of the rising portion 11 is minimum with respect to the anchor bolt 1.

  Further, the flat plate member 21 is connected closer to the upper side than the axially intermediate portion in the embedded portion of the anchor bolt 1. The anchor bolt 1 has an upper end projecting upward by a height h above the top end of the rising portion 11, and a shaft excluding the upper end is embedded in the rising portion 11 in the vertical direction. In this case, with respect to the embedded portion of the axial portion of the anchor bolt 1 (the axial portion excluding the upper end of the height h from the entire axial portion of the anchor bolt 1) Preferably, it is attached in the range of 2, and more preferably in the range from the top 1/3 in the embedded portion.

  For example, as shown in FIG. 1, the flat plate member 21 is preferably disposed in the upper layer portion of the concrete constituting the rising portion 11 or in the vicinity of the interface between the concrete and the self-leveling material. More specifically, the flat plate member 21 is preferably disposed at a position 10 to 20 mm below the top end of the rising portion 11 in the shaft portion of the anchor bolt 1.

  Thus, the support member 2 is disposed in the vicinity of the surface layer of the rising portion 11. That is, the flat plate member 21 is provided on the upper side of the shaft portion of the anchor bolt 1, and is embedded without being exposed to the top end of the rising portion 11. Further, the hanging member 24 coupled to the flat plate member 21 is embedded in the vicinity of the surface layer of the rising portion 11 without the upper end thereof being exposed at the top end of the rising portion 11.

  The lower end of the hanging member 24 is embedded in a manner to reach the horizontal main bars 12 disposed in the longitudinal direction of the rising portion 11. More preferably, the drooping member 24 has a length such that the lower end of the drooping member 24 reaches below the transverse main muscle 12. By this, sufficient fixation with the concrete which comprises the foundation 10 is obtained.

  As shown in FIG. 2, with respect to two anchor bolts 1 uniformly disposed at the projecting corner portion, support members 2 are disposed symmetrically with respect to an imaginary line L1. That is, each support member 2 is disposed across the horizontal main bars 12 in which the flat plate member 21 extends in the longitudinal direction of the rising portion 11. The anchor bolt 1 is disposed on the outdoor side with respect to the horizontal reinforcement bars 12, and the hanging member 24 is disposed on the indoor side.

  Such a foundation structure can be suitably implemented also at the intersection of the foundation 10, as shown in FIG. In this embodiment, the foundation 10 is erected in a substantially T-shape, and the rising portion 11 extended to the indoor side forms two adjacent corners adjacent to each other. An upper structure such as a field wall is erected on a virtual line L2 parallel to the line. The anchor bolt 1 and the support member 2 are disposed symmetrically with respect to the imaginary line L 2 in the rising portion 11.

  The two anchor bolts 1 are equally disposed on the outdoor side of the horizontal main bars 12. With respect to these anchor bolts 1, the flat plate member 21 straddles the horizontal main bars 12 and is extended to the side with a greater thickness of concrete, and the hanging member 24 is arranged on the indoor side of the horizontal main bars 12.

The flat plate member 21 with respect to the anchor bolt 1 is not limited to the illustrated form as long as the concrete is covered in the rising portion 11 in a direction in which the covering thickness is large and is embedded without being exposed to the rising portion 11 It may extend in any direction. Therefore, for example, the hanging member 24 coupled to the flat plate member 21 can be disposed in a fan-shaped range R surrounded by _two imaginary lines l ₁ and l ₂ shown in FIG. 4. Virtual line l ₁ is the line connecting the internal corner of the anchor bolt 1 and the indoor side, the imaginary line l ₂ is a line extending from the anchor bolt 1 to the virtual line L2 direction, transverse main reinforcements 12 along the virtual line L2 And the hanging member 24 do not interfere with each other.

In the above basic structure, the anchor bolt 1 and the support member 2 are arranged symmetrically with respect to the virtual lines L1 and L2, but the anchor bolt 1 and the support member 2 are not necessarily the virtual line L1, It may not be disposed symmetrically with respect to L2. As long as the arrangement form takes into consideration the range R shown in FIG. 4, the two flat plate members 21 may be arranged parallel to each other along the imaginary line ₁₁ , and so on.

  As described above, the anchor bolt 1 embedded in the rising portion 11 can be provided with the support member 2, and the drooping member 24 can be embedded at a position separated from the anchor bolt 1 via the flat plate member 21. The support member 2 can be appropriately determined in accordance with the shape of the base 10 and the thickness of the rising portion 11, and can be implemented by various embedding modes.

  The horizontal force acting on the building is transmitted to the concrete constituting the foundation 10 via the anchor bolt 1.

  For example, as shown in FIGS. 5 and 6, it is assumed that a horizontal force (shearing force) Q acts on the headed anchor bolt 51 embedded in the foundation 50 in the direction of the outer surface of the rising portion 52. In this case, it is possible to assume a frusto-conical stress range expanding in the direction of the outer surface of the rising portion 52 with the exposed position of the anchor bolt 51 from the rising portion 52 as the apex by the horizontal force Q (cone (cone Failure resistance).

  A surface inclined 45 ° with respect to the anchor bolt 51 shown in FIG. 5 represents a sheared surface 53 which constitutes a side surface of a frusto-conical shaped stress range. The anchor bolt 51 embedded in the concrete is a mechanism to resist the shear stress of the concrete generated on the shear surface 53, and the gray part shown in FIG. 6 is an effective projection when calculating the cone-like fracture resistance of the anchor bolt 51. It is assumed that the area A. The horizontal force Q acting on the anchor bolt 51 is transmitted to the range above the shearing surface 53.

  This is applied to the anchor bolt 1 of the foundation 10 according to the embodiment. First, as shown in FIG. 7A as a reference example, the case where two anchor bolts 71 not having the support member 2 are equally disposed at the corner of the foundation 70 will be examined. In this case, the sheared surface 72 when a horizontal force is applied to the anchor bolt 71 is a 45 ° inclined surface with respect to the shaft portion of the anchor bolt 71, as shown in FIG. 7B. The shear resistance obtained by combining the two anchor bolts 71 can be evaluated from the effective projected area A7 shown in FIG. 7 (c).

  On the other hand, when the support member 2 of the above configuration is attached to the anchor bolt 1, as shown schematically in FIG. 8A, the position of the hanging member 24 of the support member 2 coupled to the anchor bolt 1 is referred to As a point, it is possible to evaluate the shear resistance. That is, since the frustum-shaped stress range can be assumed with the upper end of the hanging member 24 as the apex, as shown in FIG. 8B, the 45 ° shear surface 81 is positioned below the shear surface 72. It will be done. The two anchor bolts 1 provided with such a support member 2 can be evaluated for the shear resistance by the effective projected area A8 shown in FIG. 8 (c).

  Comparing FIG. 7 (c) with FIG. 8 (c), the anchor bolt 1 is provided with the support member 2, whereby the effective projection area is significantly increased. That is, it can be said that the shear resistance of the anchor bolt 1 can be enhanced by the foundation structure and the support member 2 according to the embodiment, and it is possible to resist a larger horizontal force.

  Therefore, when horizontal force is applied to the anchor bolt 1 of the foundation 10, the support member 2 is provided to suppress the occurrence of breakage in the rising portion 11, and it is possible to suppress even small breakage with small breakage. Become. In addition, since the anchor bolt 1 can be provided with sufficient pull-out resistance and shear resistance in the foundation 10 having such a foundation structure, it is also possible to directly connect the anchor bolt 1 with a load-bearing wall to stand.

Second Embodiment
The above-mentioned foundation structure can be adopted not only at the corner of the foundation 10 and the T-shaped intersection but also at various parts of the rising portion 11. Depending on the plan plan and facility plan of the building, the rising portion 11 of the foundation 10 may be provided with a down portion 13 in which the level of the top end is lowered. The above basic structure can be applied to the vicinity of such a down portion 13 as well.

  FIG. 9 and FIG. 10 show the foundation structure in the foundation 10 in which the down portion 13 is provided in the rising portion 11. The rising portion 11 is a straight portion of the base 10, and a down portion 13 at a ceiling level lower than the rising portion 11 of the general portion on the right side in the drawing is provided on the left side in the drawing.

  In the rising portion 11, four anchor bolts 1 are provided in a rectangular shape in plan view. These anchor bolts 1 are embedded in concrete whose shaft portion constitutes the rising portion 11 except for the upper end portion. The upper end portion of the anchor bolt 1 exposed from the rising portion 11 penetrates the bolt hole of the base plate 31 and is tightly connected to the base plate 31 by a fixing nut 32. The lower end of the steel frame column 33 is connected to the base plate 31.

  Of the four anchor bolts 1, two anchor bolts 1 a disposed closer to the down portion 13 are provided with a support member 2. The support member 2 has the same configuration as that shown in the first embodiment.

  The two anchor bolts 1a have the outer surface 11a and the hanging member 24 from the distance between the outer surface 11a and the anchor bolt 1a with reference to the outer surface 11a where the thickness of the rising portion 11 is minimized. The support member 2 is provided by extending the flat plate member 21 in the direction in which the distance between the two is increased. As a result, even if a large horizontal force acts on the anchor bolt 1a, it is possible to make a structure in which breakage is hardly generated around the corner of the rising portion 11 close to the down portion 13.

  11 and 12 show another form of the basic structure in which the down portion 13 is provided. In this case, down portions 13 are provided on the left and right sides of the rising portion 11 on which the steel frame columns 33 are erected. In the rising portion 11, four anchor bolts 1 are provided in a rectangular shape in a plan view, and the support members 2 are provided on all the four anchor bolts 1.

  Even in this embodiment, the distance between the outer surface 11b and the hanging member 24 is smaller than the distance between the outer surface 11b and the anchor bolt 1 based on the outer surface 11b where the thickness of the rising portion 11 is minimized. The support member 2 is provided by extending the flat plate member 21 in the direction of increasing the size. That is, the flat plate member 21 is extended in the axial center direction of the steel frame column 33 with respect to the anchor bolt 1 disposed closer to the outer surface of the rising portion 11, and the hanging member 24 is disposed closer to the axial center of the steel frame column 33. It is set up. By providing the support member 2 on each of the four anchor bolts 1, even if a large horizontal force acts, breakage can be less likely to occur around the corner of the rising portion 11, and sufficient pull-out resistance and shear resistance Can be demonstrated.

  In addition, the foundation structure of the building and the support member 2 of the anchor bolt 1 according to the present invention can be implemented in various forms other than the above embodiment. In the above embodiment, a portion in which two or more anchor bolts 1 are embedded in the rising portion 11 of the foundation 10 as the foundation structure is exemplified, but the present invention is not limited to such a form, and an anchor The present invention can also be suitably applied to a portion in which the bolt 1 is embedded alone or a portion in which a plurality of bolts 1 are paralleled. Moreover, as the support member 2, the shape, length, etc. of the flat plate member 21 and the hanging member 24 are not limited to those illustrated, but may be configured in any way. The foundation structure of a building according to the present invention can be applied to either wooden or steel-framed construction. The foregoing embodiments are illustrative of the present invention and are not limited thereto.

  The present invention is suitably applicable to the rising portion of the direct foundation of a building having various forms.

DESCRIPTION OF SYMBOLS 1, 1a Anchor bolt 10 Foundation 11 Rising part 12 Horizontal reinforcement 13 Down part 2 Support member 21 Flat plate member 22, 23 Through hole 24 Hanging member 26 Fixing nut 31 Base plate 32 Fixing nut 33 Steel pillar 50, 70 Foundation 51, 71 Anchor bolt 52 rising part 53, 72 cross section

The solution according to the invention for achieving the above objects presupposes a building foundation structure provided with anchor bolts at the rising of the foundation. As this foundation structure, the upper end portion of the anchor bolt is protruded above the top end of the rising portion, and the shaft portion of the anchor bolt excluding the upper end portion is embedded in the rising portion in the vertical direction. Further, a flat plate member extending in a direction intersecting the axial direction of the anchor bolt is coupled to the shaft portion of the anchor bolt, and the flat plate member is provided with a hanging member extending downward from the flat plate member. Then, embedded without exposing these flat plate member and the hanging member to the rising portion, based on the outer surface of overburden thickness is minimum of the rising portion with respect to the anchor bolt, with the outer surface and the anchor bolt It is characterized in that the flat plate member is extended in the direction in which the distance between the outer side surface and the hanging member becomes larger than the distance.

Further, in order to achieve the above object, the following configurations are also within the scope of the technical idea of the present invention. That is, in the foundation structure of a building in which an anchor bolt is embedded in the rising portion of the foundation, a flat plate member extending in a direction intersecting with the axial direction of the anchor bolt is coupled to the anchor bolt; A hanging member extending downward from the flat member is provided, and the flat member and the hanging member are embedded without being exposed to the rising portion. Further, based on the outer surface where the covering thickness of the rising portion with respect to the anchor bolt is minimized, the distance between the outer surface and the hanging member is greater than the distance between the outer surface and the anchor bolt. Is extended in the direction of increasing the size, and is disposed above the horizontal main bars embedded in the longitudinal direction of the foundation of the rising portion, and the anchor bolt is arranged on the outdoor side of the horizontal main bars, It has a configuration of disposing the hanging member indoor side.

The support member of the anchor bolt used for the foundation structure is also within the scope of the technical idea of the present invention. That is, a support member for an anchor bolt having a flat plate member coupled to the anchor bolt and a hanging member attached to the flat plate member, wherein the flat plate member is a plate-like member and penetrates both ends in the longitudinal direction. A hole is provided, one of the through holes is provided with a tap corresponding to the shaft of the anchor bolt on the inner peripheral surface, and the hanging member is a rod-like member having a head, excluding the head has an uneven portion on the outer surface, wherein the said head and the fixed nut through the other side of the through hole is coupled to said flat plate member is characterized by comprising extends in the direction crossing the flat plate member .

Claims (8)

It is the foundation structure of the building where anchor bolt was buried in the rising part of the foundation,
The anchor bolt is coupled to a flat plate member extending in a direction intersecting the axial direction of the anchor bolt, and the flat plate member is provided with a hanging member extending downward from the flat plate member, and the flat member and the hanging member Is embedded without being exposed to the rising part of the foundation,
Based on the outer surface where the covering thickness of the rising portion with respect to the anchor bolt is minimized, the distance between the outer surface and the depending member becomes larger than the distance between the outer surface and the anchor bolt. A foundation structure of a building characterized in that a flat plate member is extended. In the foundation structure of a building according to claim 1,
The anchor bolt is embedded with a different covering thickness to one outer side surface of the rising portion and another covering outer surface opposite to the one.
The foundation structure of a building, wherein the flat plate member is extended in a direction in which the covering thickness with respect to an anchor bolt is large. In the foundation structure of a building according to claim 1 or 2,
The foundation structure of a building, wherein the flat plate member is provided with a through hole through which the anchor bolt is inserted, and is connected to an upper side than an axial middle portion of the embedded portion of the anchor bolt. In the foundation structure of a building according to any one of claims 1 to 3,
In the foundation structure of a building, the flat plate member has an anchor bolt coupled to one end in the longitudinal direction and a hanging member separate from the flat plate member coupled to the other end. In the foundation structure of a building according to any one of claims 1 to 4,
The foundation structure of a building, wherein the hanging member has a length such that a lower end of the hanging member reaches a horizontal main bar disposed in the longitudinal direction of the base of the rising portion. In the foundation structure of a building according to claim 5,
The hanging member is a rod-shaped member which is attached to penetrate the flat plate member, and has an uneven portion on an outer surface thereof. In the foundation structure of a building according to any one of claims 1 to 6,
The flat plate member is disposed above the horizontal main bars embedded in the longitudinal direction of the base of the rising portion,
A foundation structure of a building, wherein the anchor bolt is disposed on the outdoor side of the crossbar and the hanging member is disposed on the indoor side of the crossbar. A support member for an anchor bolt comprising a flat plate member coupled to the anchor bolt and a hanging member attached to the flat plate member, the support bolt comprising:
The flat plate member is a plate-like body, and is provided with through holes at both ends in the longitudinal direction,
The hanging member is a rod-like member, has an uneven portion on the outer surface, is connected to the flat plate member through one of the through holes, and extends in a direction intersecting the flat plate member. Anchor bolt support member.

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