JP2018035530A - Building foundation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building foundation structure capable of preventing inundation into foundation inside between a precast concrete member and a jacket material disposed at the outer side thereof.SOLUTION: A foundation structure 10 of a building has a precast concrete member. The foundation structure includes: a foundation slab 1; a PC corner part 2A and a T-shaped PC part 2B which are disposed along the circumference of an upper plane 11 of the foundation slab 1 with a certain distance; and a corner jacket material 3A and a flat type jacket material 3B which are disposed at the side face 12 side of the foundation slab 1 and outer side face 21 of the precast concrete member. The jacket materials (3A, 3B) extend downward vertically covering the side face 12 of the foundation slab 1, and waterproof materials 4A and 4B are interposed between the foundation slab and the precast concrete member along the edge of the jacket material.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a building foundation having precast concrete members.

  Patent Document 1 discloses the foundation of a building constructed using precast concrete members. This foundation is composed of precast reinforced concrete bundles having a substantially L shape in plan view and a substantially T shape in plan view arranged at intervals along the periphery of the building, and side plates made of precast reinforced concrete connecting them. Yes. With this side plate, it is possible to ensure a uniform aesthetic appearance in the overall appearance of the foundation.

  Patent Document 2 discloses a foundation structure with a decorative plate in which a decorative plate is attached to the outer surface of the foundation. Further, Patent Document 3 discloses a dry foundation using an extruded cement board in which a plurality of hollow portions are extended in parallel. The lower end of the extruded cement board is inserted into a groove-like lower runner fixed to the upper surface of the discarded concrete to keep the standing state.

JP 09-71946 A JP 2013-87491 A JP 2007-217871 A

  However, if there is a gap between the precast concrete member and the exterior material disposed on the surface side such as a decorative board, water may enter the inside of the foundation of the building from there.

  Then, this invention aims at providing the foundation structure of the building which can prevent the inundation to the inside of a foundation from between the precast concrete member and the exterior material arrange | positioned on the outer surface side.

  In order to achieve the above object, the foundation structure of a building according to the present invention is a foundation structure of a building having a precast concrete member, and includes a bottom plate portion formed in a slab shape and at least a peripheral edge of an upper surface of the bottom plate portion. A plurality of precast concrete members arranged at intervals, and an exterior material disposed on a side surface of the bottom plate portion and an outer surface side of the precast concrete member, and the exterior material has a lower end of the bottom plate portion. In addition to being suspended so as to cover the side surface, a waterproof material is interposed between the bottom plate portion and the precast concrete member along the edge of the exterior material.

  Here, while the said exterior material is spanned between the said precast concrete members, it can be set as the structure where the clearance gap between the said exterior materials adjacent on the outer surface side of the said precast concrete member becomes a joint part.

  Moreover, the said exterior | packing material can be set as the structure connected in the state which can adjust the position of a perpendicular direction and an out-of-plane direction with a mooring bracket with respect to the outer surface of the said precast concrete member.

  Further, between the adjacent exterior materials sandwiching the joint portion, a surface conditioning fitting is passed, and a screw material is inserted into the screw hole of the surface conditioning fitting exposed to the joint portion of the precast concrete member. It can be set as the structure screwed toward an outer surface.

  Moreover, it is preferable that the insert material for screwing the screw material which fixes the edge part of the said mooring metal fitting is embed | buried on the outer surface side of the said precast concrete member.

  Furthermore, the said exterior material can be set as the structure currently supported by the said baseplate part via the height adjustment metal fitting. Moreover, it can be set as the structure by which the hollow part which inserts the edge part of the said mooring metal fitting is formed in the side edge part of the said exterior material.

  And it can be set as the structure by which the notch part is provided in the lower edge of the outer surface of the said precast concrete member, and the sealing material is filled between the said baseplate part and the said notch part.

  Further, a low friction material may be interposed between the upper surface of the bottom plate portion and the bottom surface of the precast concrete member. Furthermore, it can be set as the structure by which the connection hole for embedding the connection material made to protrude below from the bottom face of the said precast concrete member is provided in the said baseplate part. And it is preferable that the periphery of the said connection hole used as the upper surface of the said baseplate part is surrounded by the low friction material.

  In the foundation structure of the building of the present invention configured as described above, a plurality of precast concrete members are arranged at intervals along the peripheral edge of the upper surface of the bottom plate portion formed in a slab shape. Moreover, an exterior material is arrange | positioned at the side surface of a baseplate part, and the outer surface side of a precast concrete member. And a waterproof material is interposed between a baseplate part and a precast concrete member along the edge of an exterior material.

  For this reason, it is in a state in which a waterproof material is disposed on the side edge and the lower edge of the exterior material, and prevents water from entering the foundation from between the precast concrete member and the exterior material disposed on the outer surface side thereof. Can do.

  Moreover, if the exterior material is adjacent to the outer surface side of the precast concrete member and the joint portion is provided, a waterproof material can be interposed between the exterior material and the precast concrete member, and high waterproof performance is achieved. It can be demonstrated.

  Furthermore, if the exterior material is connected by a mooring bracket in a state where the position can be adjusted in the vertical direction and the out-of-plane direction, the exterior material can be temporarily fixed and then finely adjusted to achieve an excellent appearance. . In particular, the adjustment of the position in the out-of-plane direction between the exterior materials can be easily performed by using a surface-conditioning fitting and a screw material that extend across the joint.

  In addition, if an insert material for screwing the screw material that fixes the end of the mooring bracket is embedded on the outer surface side of the precast concrete member, the screw material can be easily fixed without damaging the precast concrete member. It can be carried out.

  Furthermore, if it is the structure which supports an exterior material to a baseplate part via a height adjustment metal fitting, the fine adjustment of a height direction can be easily performed after temporarily fixing an exterior material. Moreover, if the hollow part which inserts the edge part of a mooring metal fitting is formed in the side edge part of an exterior material, it can fix to a precast concrete member, without affecting the surface side of an exterior material.

  Then, by providing a notch at the lower edge of the outer surface of the precast concrete member and filling the sealing material, it is possible to prevent water from entering the gap between the precast concrete member and the bottom plate.

  Further, if a low friction material is interposed between the upper surface of the bottom plate portion and the bottom surface of the precast concrete member, fine adjustment of the planar position of the precast concrete member can be easily performed.

  Furthermore, if the connection hole for embedding the connection material protruded downward from the bottom face of the precast concrete member is provided in the bottom plate portion, the precast concrete member can be firmly fixed to the bottom plate portion.

  And if the periphery of the connection hole used as the upper surface of a bottom-plate part is surrounded by the low friction material, even if a leveling material etc. are spread on the upper surface of a bottom-plate part, it can prevent flowing into a connection hole.

It is a perspective view explaining the structure of the foundation structure of the building of this Embodiment. It is a top view explaining the structure of the foundation structure of the building of this Embodiment. It is sectional drawing explaining the arrangement | positioning relationship between a PC corner part and a corner exterior material. It is sectional drawing which expanded and showed the upper part and lower part of FIG. It is sectional drawing explaining arrangement | positioning of a flat type | mold exterior material. It is a front view explaining the structure of a mooring metal fitting. It is sectional drawing explaining the state in which the mooring metal fitting was attached to the corner exterior material. It is a perspective view explaining the process of attaching a corner exterior material to a PC corner part. It is a front view explaining the process of mounting | wearing a surface tone fitting to a corner exterior material. It is a perspective view explaining the process of attaching a flat type | mold exterior material adjacent to a corner exterior material. It is sectional drawing explaining the arrangement position of a height adjustment metal fitting by planar positional relationship. It is sectional drawing explaining the process of position adjustment by a height adjustment metal fitting. It is sectional drawing explaining the state which the surface metal fitting was only passed. It is sectional drawing explaining the state in which the position adjustment of the out-of-plane direction was performed by the surface tone metal fittings. It is sectional drawing explaining the structure of a joint part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view illustrating the configuration of a building foundation structure 10 according to the present embodiment, and FIG. 2 is a plan view of the foundation structure 10.

  The foundation structure 10 of the present embodiment is constructed by using a solid foundation of a building using a cast-in-place concrete and a precast concrete member. That is, as shown in FIG. 2, the foundation structure 10 includes a foundation slab 1 as a bottom plate constructed in a slab shape by reinforced concrete in a rectangular area, for example, as a foundation construction area of a building, and a peripheral edge of the foundation slab 1. And precast concrete members (2A, 2B, 2C, 20A, 20B) arranged at intervals inside.

  As shown in FIGS. 3 and 5, the foundation slab 1 is mainly composed of a bar arrangement portion 13 constituted by a plurality of reinforcing bars arranged in the horizontal direction and concrete placed on site. .

  A base layer 14 is formed below the foundation slab 1 with chestnut stone, discarded concrete, or the like. Further, the lower part of the plate-shaped foundation slab 1 is buried back below the ground G, and the upper part protrudes from the ground G. That is, the upper portion 11 and the upper surface 11 of the side surface 12 of the foundation slab 1 are projected from the ground G and exposed.

  As shown in FIG. 2, a plurality of precast concrete members (2 </ b> A- 2 </ b> C) are arranged at intervals along the periphery of the foundation slab 1. Here, the precast concrete member arranged at the corner portion of the foundation slab 1 is a PC corner portion 2A, and the precast concrete member arranged between the PC corner portions 2A and 2A is a T-type PC portion 2B or an intermediate PC portion 2C. To do.

  The precast concrete member is a block made of reinforced concrete or PC concrete manufactured in a factory, and the PC corner portion 2A is formed in a substantially L shape in plan view. Further, the T-type PC portion 2B is formed in a substantially T shape in plan view. Further, the intermediate PC portion 2C is formed in a substantially rectangular shape in plan view.

  Furthermore, a plurality of precast concrete members (20A, 20B) are also arranged at intervals inside the foundation slab 1. A cross-shaped PC portion 20A having a substantially cruciform shape in plan view is disposed at an intersection between the T-type PC portions 2B and 2B facing each other. A letter-shaped I-type PC unit 20B is arranged.

  Here, the configuration of the precast concrete member will be further described with reference to FIG. 3 using the PC corner portion 2A as an example. In the PC corner portion 2 </ b> A, an outer surface 21 is formed that rises in a wall shape from the upper surface 11 of the foundation slab 1. The outer side surface 21 forms a vertical surface substantially continuous with the side surface 12 of the foundation slab 1.

  A reinforcing plate 24 for connecting the building main body 101 via the anchor bolt 241 is disposed on the upper surface 26 of the PC corner portion 2A. Further, a reinforcing bar 22 is provided by a reinforcing bar inside the PC corner part 2A, and the lower part of the reinforcing bar oriented in the vertical direction protrudes downward from the bottom surface of the PC corner part 2A to become a connecting member 221.

  A supporting plate 222 is provided at the lower end of the connecting member 221, and is inserted into the connecting hole 15 provided in the foundation slab 1, and is buried by filled concrete 151 filled in the periphery.

  As shown in the lower half of FIG. 4, the PC corner portion 2 </ b> A is provided with a rectangular parallelepiped cutout portion 23 along the lower edge of the outer surface 21. The notch 23 is filled with a filler 232 such as a water expansion sealant 231 and a polymer cement mortar as a sealant between the upper surface 11 of the foundation slab 1.

  And as shown in FIG. 1, exterior material (3A, 3B) is on the outer surface 21 side of the precast concrete member (2A, 2B, 2C) arranged on the side surface 12 of the foundation slab 1 and the periphery of the foundation slab 1. Be placed.

  The exterior material (3A, 3B) includes a corner exterior material 3A disposed at the corner of the PC corner portion 2A, between the PC corner portion 2A and the T-type PC portion 2B, between the T-type PC portions 2B and 2B, and There is a flat exterior material 3B disposed between the intermediate PC portion 2C and the T-type PC portion 2B.

  These exterior materials (3A, 3B), as shown in FIGS. 3 and 5, are provided with a plurality of hollow portions 31,... That extend in the horizontal direction and are arranged substantially in parallel at intervals in the vertical direction. It is done. The hollow portion 31 is formed in a rectangular parallelepiped shape and penetrates between the side end portions 32 and 32 on both sides in the width direction of the exterior material (3A, 3B).

  Such exterior materials (3A, 3B) are manufactured by an extruded cement board or the like. In the following, description will be continued with reference to FIGS.

  The corner exterior member 3A is attached to the outer surface 21 side of the PC corner portion 2A with the positions of the upper surfaces 26 and 36 aligned. The upper surface 36 of the corner exterior material 3A is covered with a draining material 101a protruding from the building body 101. Further, the gap between the upper surface 36 of the corner exterior member 3A and the upper surface 26 of the PC corner portion 2A is closed by the waterproof tape 17.

  Further, a decorative material 33 or a tile with a pattern is attached to the outer surface side of the corner exterior material 3A. Further, the lower end surface 34 of the corner exterior member 3A is disposed at a position spaced above the ground G.

  And as shown in FIG. 1, the waterproof material 4A is affixed on the both side edge part and lower edge part by the side of the back surface of 3 A of corner exterior materials so that it may become a substantially U shape in side view continuously. That is, the waterproof material 4A is formed by a pair of opposing vertical portions 41, 41 and a horizontal portion 42 connecting the lower ends thereof.

  Moreover, the waterproof material 4B is affixed also to the both side edge part and lower edge part by the side of the back surface of the flat type | mold exterior material 3B so that it may become a substantially U shape in side view continuously. In short, the foundation slab 1 and the precast concrete along the edge of the exterior material (3A, 3B) suspended from the outer surface 21 of the precast concrete member (2A-2C) so that the lower end covers the side surface 12 of the foundation slab 1. Waterproof members 4A and 4B are interposed between the members (2A-2C). As the waterproof materials 4A and 4B, a foamed urethane resin body mainly made of special soft polyurethane or special polyurethane can be used.

  Moreover, the heat insulating materials 5A, 5B, and 5C are continuously arranged on the inner side surface of the foundation slab 1 of the precast concrete member (2A-2C) and the flat exterior material 3B. Furthermore, the heat insulating material 5D is also arranged on the upper surface 11 of the foundation slab 1 adjacent to these heat insulating materials 5A-5C.

  The exterior materials (3A, 3B) are connected to the outer surface 21 of the precast concrete member (2A-2C) by the mooring bracket 6. As shown in FIGS. 6A and 6B, the mooring bracket 6 includes a rectangular plate-shaped protruding portion 61, a stepped portion 63 that rises at a right angle from the side edge thereof, and an opposite side of the protruding portion 61 from the upper edge of the stepped portion 63. And an insertion portion 62 extending in the shape of a substantially Z-shape in side view.

  A screw hole 621 for inserting a bolt 65 that is a screw material is drilled in the insertion portion 62. A nut 64 for screwing the bolt 65 is fixed to the insertion portion 62 in the screw hole 621.

  On the other hand, a screw hole 611 for inserting a bolt 612 that is a screw material is also drilled in the protruding portion 61. As for the mooring fixture 6, the insertion part 62 is inserted in the hollow part 31 of 3 A of corner exterior materials, and the nut 64 is engage | inserted in the attachment hole 35 of 3 A of corner exterior materials. Then, the mooring bracket 6 is fixed to the corner exterior member 3A by the bolt 65 screwed into the attachment hole 35 from the outside of the corner exterior member 3A.

  Next, the construction method of the building foundation structure 10 of the present embodiment will be described. The construction method of the foundation structure 10 is a construction method of a solid foundation using precast concrete members (2A-2C, 20A, 20B).

  First, after excavating the ground G, which is a foundation construction area, and laying and leveling chestnuts (crushed stone), the foundation layer 14 is provided by placing discarded concrete. And the reinforcement part 13 is provided on the base layer 14, and the concrete for foundation slabs 1 is laid. It should be noted that a box forming mold is previously installed at the location of the connecting hole 15.

  And as shown in FIG. 2, PC corner part 2A, ... is arrange | positioned in the corner part of the upper surface 11 of the basic | foundation slab 1 constructed | assembled by the planar view rectangle. When installing the PC corner portion 2A, as shown in FIG. 3, the periphery of the connection hole 15 is surrounded by a low friction material 16 such as modified silicone.

  The low friction material 16 is also interposed between the upper surface 11 of the basic slab 1 other than the periphery of the connecting hole 15 and the bottom surface of the PC corner portion 2A. By interposing the low friction material 16, fine adjustment of the planar position of the PC corner portion 2A can be easily performed.

  A leveling material is spread on the upper surface 11 of the foundation slab 1 as necessary. At this time, if the peripheral edge of the connection hole 15 is surrounded by the low friction material 16, the slurry-like leveling material is dammed and the flow into the connection hole 15 is prevented.

  The connecting hole 15 is filled with filled concrete 151 before the PC corner portion 2A is installed. Then, the connecting member 221 protruding from the bottom surface of the PC corner portion 2A is inserted into the connecting hole 15 filled with the filled concrete 151.

  After the PC corner portion 2A is installed at an accurate plane position by fine adjustment, the notched portion 23 is filled with the water expansion sealing material 231 and the filling material 232 as shown in FIG. The

  Similarly, the T-type PC part 2B,... And the intermediate PC part 2C,... Are arranged along the periphery of the upper surface 11 of the basic slab 1. Further, a cross-shaped PC unit 20A,... And an I-type PC unit 20B,.

  Subsequently, as shown in FIG. 7, the corner exterior member 3A is attached to the outer side surface 21 of the PC corner portion 2A. Here, an insert material 25 for screwing the bolts 612 and 71 is embedded in the outer surface 21 of the PC corner portion 2A in advance.

  On the other hand, the protruding portion 61 of the mooring bracket 6 protrudes from the side end portion 32 of the corner exterior member 3A, and the bolt 612 is screwed toward the insert member 25 into the screw hole 611 of the protruding portion 61. Temporarily fix with. Subsequently, the upper surface 36 of the corner exterior member 3A is matched with the height of the upper surface 26 of the PC corner portion 2A, and the bolt 612 is permanently fixed.

  In this way, the corner exterior material 3A connected to the PC corner portion 2A by the mooring bracket 6 covers the outer side surface 21 of the PC corner portion 2A and the upper portion of the side surface 12 of the foundation slab 1 as shown in FIG. It is attached. And the waterproof material 4A is interposed along the side edge and lower edge of 3 A of corner exterior materials.

  Subsequently, one end of the rectangular plate-shaped surface fitting 7 is inserted into the hollow portion 31 in the middle in the height direction of the corner exterior member 3A. The surface fitting 7 is a fitting having a screw hole 73 into which a bolt 71 as a screw material is inserted at the center. As shown in FIGS. 12A and 12B, cushioning materials 72 and 72 are attached to both side edges of the surface fitting 7.

  Furthermore, as shown in FIG. 9, adjacent to the corner exterior member 3A connected to the PC corner portion 2A, one end of the flat exterior member 3B is connected to the outer surface 21 of the PC corner portion 2A.

  FIG. 10 shows an arrangement relationship between the corner exterior material 3A and the flat exterior material 3B which are adjacent to each other with a gap serving as the joint portion 30 therebetween. The other end of the surface fitting 7 having one end inserted into the corner exterior member 3A is inserted into the hollow portion 31 of the flat exterior member 3B.

  Further, the flat outer packaging material 3B is supported on the upper surface 11 of the foundation slab 1 via the height adjustment fitting 8 at a position adjacent to the PC corner portion 2A. As shown in FIG. 11, the height adjustment fitting 8 is formed in a substantially L shape in a side view, and one piece is fixed to the back surface of the flat exterior member 3B by a fixing screw 83.

  A nut 82 is fixed to the other piece projecting to the upper surface 11 side, and the height of the flat outer packaging material 3B can be finely adjusted by screwing a bolt 81 into the nut 82. That is, the front end of the bolt 81 is in contact with the upper surface 11 of the foundation slab 1, and the flat outer packaging material 3 </ b> B can be moved in the vertical direction by the screwing amount of the bolt 81.

  Here, since the flat exterior material 3B is connected to the PC corner portion 2A by the Z-shaped mooring bracket 6 that is easily deformed, the flat exterior material 3B remains connected if it is a slight distance allowing deformation. It can be moved in the vertical direction. Further, by making the screw hole 611 of the protruding portion 61 larger than the diameter of the bolt 612, the position in the vertical direction can be adjusted during temporary fixing.

  Then, the flat exterior material 3B whose height is aligned with the adjacent corner exterior material 3A by adjusting the height adjustment metal fitting 8 is an upper surface 11 of the foundation slab 1 via a fixing metal fitting (not shown) (L-shaped metal fitting). To be joined.

  FIG. 12A shows the surface fitting 7 in a state of being inserted between the corner exterior material 3A and the flat exterior material 3B. The bolt 71 as the screw member is screwed toward the outer surface 21 into the screw hole 73 of the surface conditioner 7 exposed to the joint portion 30.

  At a stage where the bolt 71 is not tightened, the corner exterior member 3A and the flat exterior member 3B adjacent to each other with the joint portion 30 interposed therebetween may be misaligned in the out-of-plane direction.

  Therefore, when the bolt 71 is screwed in as shown in FIG. 12B, the cushioning materials 72 and 72 and the waterproofing materials 4A and 4B are compressed and deformed, and the corner exterior material 3A and the flat exterior material 3B are aligned in the out-of-plane direction. Can do. That is, the corner exterior member 3A and the flat exterior member 3B connected to the PC corner portion 2A by the easily deformable mooring bracket 6 can be finely adjusted in the out-of-plane direction while being connected.

  In the gap between the joint portion 30 between the corner exterior member 3A and the flat exterior member 3B, which are fixed by adjusting the position in the vertical direction and the out-of-plane direction, a gasket 301 is provided as shown in FIG. Inserted.

  Next, the effect | action of the foundation structure 10 of the building of this Embodiment is demonstrated.

  In the building foundation structure 10 of the present embodiment configured as described above, a plurality of precast concrete members (2A-2C) are arranged at intervals along the periphery of the upper surface 11 of the foundation slab 1.

  Further, exterior materials (3A, 3B) are disposed on the side surface 12 of the foundation slab 1 and the outer surface 21 side of the precast concrete member. And waterproof material 4A, 4B is interposed between the side surface 12 and the outer side surface 21 along each edge part of 3 A of corner exterior materials, and the flat type exterior material 3B.

  For this reason, the vertical parts 41 and 41 of the waterproof materials 4A and 4B are arranged on the side edges of the exterior materials (3A and 3B), and the horizontal part 42 is arranged on the lower edge, so that the precast concrete member ( 2A-2C) and the exterior material (3A, 3B) disposed on the outer surface side can prevent water from entering the foundation.

  Further, if the corner exterior material 3A and the flat exterior material 3B or the flat exterior materials 3B, 3B are adjacent to each other on the outer surface 21 side of the precast concrete member (2A-2C), the exterior portion 30 is provided. Waterproof materials 4A and 4B can be interposed between the materials (3A and 3B) and the outer surface 21 of the precast concrete member, so that high waterproof performance can be exhibited.

  Further, the exterior materials (3A, 3B) are connected by the mooring bracket 6 in a state in which the position of the exterior materials (3A, 3B) can be adjusted in the vertical direction and the out-of-plane direction. It can be finished with a good appearance. In particular, the position adjustment in the out-of-plane direction between the exterior materials (3A, 3B) can be easily adjusted by the surface fitting 7 and the bolt 71 that are spanned across the joint portion 30.

  Moreover, if the insert material 25 for screwing the bolt 612 for fixing the protruding portion 61 of the mooring bracket 6 and the bolt 71 of the surface fitting 7 is embedded on the outer surface 21 side of the precast concrete member, Fixing and position adjustment with the bolts 612 and 71 can be easily performed without damaging the precast concrete member (2A-2C).

  Further, if the flat exterior material 3B is supported on the upper surface 11 of the basic slab 1 via the height adjusting bracket 8, fine adjustment in the height direction can be easily performed after the flat exterior material 3B is temporarily fixed. Can do.

  Moreover, if the hollow part 31 which inserts the insertion part 62 of the mooring bracket 6 in the side edge part 32 of exterior material (3A, 3B) is formed, it will affect the surface side of exterior material (3A, 3B). The precast concrete member can be fixed to the outer surface 21 without any problem.

  And the notch part 23 is provided along the lower edge of the outer surface 21 of a precast concrete member (2A-2C), and it fills with sealing materials, such as the water expansion | swelling sealing material 231 and the filler 232, and precast It is possible to prevent water from entering the gap between the bottom surface of the concrete member (2A-2C) and the top surface 11 of the foundation slab 1.

  Moreover, if the low friction material 16 is interposed between the upper surface 11 of the foundation slab 1 and the bottom surface of the precast concrete member (2A-2C), the precast concrete member (2A-2C) can be easily moved and Fine adjustment of the position can be easily performed.

  Furthermore, if the connection hole 15 for embedding the connection material 221 protruded below from the bottom face of the precast concrete member (2A-2C) is provided in the foundation slab 1, the foundation of the precast concrete member (2A-2C) is provided. It can be firmly fixed to the slab 1.

  And if the periphery of the connection hole 15 used as the upper surface 11 of the foundation slab 1 is surrounded by the low friction material 16, it will flow into the connection hole 15 when leveling material is spread on the upper surface 11 of the foundation slab 1. Can be prevented.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, in the said embodiment, although the basic slab 1 constructed | assembled at a construction site was demonstrated as a baseplate part, it is not limited to this, The baseplate part made from a precast may be sufficient.

10 Foundation structure 1 Foundation slab (bottom plate)
11 Upper surface 12 Side surface 15 Connection hole 16 Low friction material 2A PC corner (precast concrete member)
2B T-shaped PC section (precast concrete member)
2C Intermediate PC section (Precast concrete member)
21 Outer surface 221 Connecting material 23 Notch 231 Water expansion sealing material (seal material)
232 Filler (sealant)
25 Insert material 3A Corner exterior material (exterior material)
3B Flat exterior material (exterior material)
30 Joint portion 31 Hollow portion 32 Side end portion 4A, 4B Waterproof material 6 Mooring bracket 612 Bolt (screw material)
7 surface fittings 71 bolts (screw material)
73 Screw hole 8 Height adjustment bracket

Claims (11)

A foundation structure of a building having precast concrete members,
A bottom plate formed in a slab shape;
A plurality of precast concrete members arranged at intervals along at least the peripheral edge of the upper surface of the bottom plate portion;
An exterior material disposed on a side surface of the bottom plate portion and an outer surface side of the precast concrete member;
The exterior material is suspended so that the lower end covers the side surface of the bottom plate portion, and a waterproof material is interposed between the bottom plate portion and the precast concrete member along the edge of the exterior material. The basic structure of the building.   The building according to claim 1, wherein the exterior material is bridged between the precast concrete members, and a gap between the exterior materials adjacent to each other on the outer surface side of the precast concrete member serves as a joint portion. Foundation structure.   The building foundation structure according to claim 2, wherein the exterior material is connected to an outer surface of the precast concrete member by a mooring bracket so that the position of the exterior material can be adjusted in the vertical direction and the out-of-plane direction. .   Between the adjacent exterior materials sandwiching the joint portion, a surface fitting is passed, and the screw material is outside the surface of the precast concrete member with respect to the screw hole of the surface fitting exposed at the joint portion. The foundation structure of a building according to claim 3, wherein the building foundation structure is screwed toward the building.   The foundation structure of a building according to claim 3 or 4, wherein an insert material for screwing a screw material for fixing an end portion of the mooring bracket is embedded on an outer surface side of the precast concrete member. .   The building foundation structure according to any one of claims 3 to 5, wherein the exterior material is supported by the bottom plate portion via a height adjustment fitting.   The building foundation structure according to any one of claims 3 to 6, wherein a hollow portion into which an end portion of the mooring bracket is inserted is formed at a side end portion of the exterior material.   The notch part is provided in the lower edge of the outer side surface of the said precast concrete member, and the sealing material is filled between the said baseplate part and the said notch part, The 1st thru | or 7 characterized by the above-mentioned. The foundation structure of a building as described in any one of.   The building foundation structure according to any one of claims 1 to 8, wherein a low friction material is interposed between an upper surface of the bottom plate portion and a bottom surface of the precast concrete member.   10. The connection hole for embedding a connection material protruding downward from the bottom surface of the precast concrete member is provided in the bottom plate portion. 10. The basic structure of the building.   The foundation structure of the building according to claim 10, wherein a peripheral edge of the connection hole which is an upper surface of the bottom plate portion is surrounded by a low friction material.