JP5919001B2 - Grout retaining material, building foundation structure, and construction method thereof - Google Patents

Description

  The present invention relates to a grout retaining material, a foundation structure of a building, and a construction method thereof.

  As described in Patent Document 1, as a foundation structure of a building, a building placed on the top end surface of foundation concrete via foundation packing, anchor bolts that are implanted in the foundation concrete and pass through the through holes of the foundation packing There are some which are fixed to the foundation concrete. In this foundation structure, the underfloor ventilation of the building can be improved by the ventilation holes provided in the foundation packing.

  Further, as a basic structure of a conventional building, as described in Patent Document 2, there is one in which a grout of a curable liquid filler is injected and cured inside a through hole of a basic packing. In this foundation structure, when a building moves relative to the horizontal direction due to a horizontal force such as an earthquake or a typhoon, it is possible to prevent a large bending stress from acting on a portion of the anchor bolt protruding from the foundation concrete.

Patent 459502 JP2004-250966

  In the prior art, the grout injected into the through hole of the base packing may flow out from the inside of the through hole of the basic packing to the outside through the vent hole, which may impair the effect of suppressing the bending stress acting on the anchor bolt. is there.

  In the prior art, the grout is injected over the entire area of the large compartment inside the through hole of the basic packing, and the grout to be injected and hardened around the anchor bolt is used in an unnecessarily large amount.

It is an object of the present invention to reduce the required amount of grout that must be injection hardened around an anchor bolt that passes through a through hole in the base packing.

In the invention according to claim 1 , a building placed on the top end surface of the foundation concrete via the foundation packing is fixed to the foundation concrete by anchor bolts that are planted in the foundation concrete and pass through the through holes of the foundation packing. In the foundation structure of a building, a curable liquid consisting of a cylindrical body placed around the anchor bolt on the top end surface of the foundation concrete inside the through hole of the foundation packing, which is injection-hardened around the anchor bolt A grout holding material formed by forming a small section for holding the grout of the filler inside the cylindrical body is used.

The invention according to claim 2 is the invention according to claim 1 , wherein the grout holding material further includes an annular groove along the circumferential direction of the cylindrical body on the bottom surface of the cylindrical body in contact with the top end surface of the foundation concrete. An adhesive that adheres the cylindrical body to the top end surface of the foundation concrete can be applied to the annular groove.

The invention according to claim 3 is the construction method of the foundation structure of the building according to claim 1 , wherein an adhesive is applied to the bottom surface of the foundation packing, and the bottom surface of the foundation packing is placed on the top end surface of the foundation concrete. A step of placing the tubular body of the grout holding material inside the through hole of the foundation packing around the anchor bolt on the top end surface of the basic concrete, and a small section of the tubular body of the grout holding material, Injecting a grout of curable liquid filler, curing the grout around the anchor bolt, and after injecting the grout, the foundation of the building is placed on the top end surface of the foundation concrete through the foundation packing, And a step of fixing to the foundation concrete with anchor bolts .

According to a fourth aspect of the present invention, in the third aspect of the invention, an annular groove is provided on the bottom surface of the tubular body of the grout holding material along the periphery of the tubular body. An adhesive is applied to the annular groove, and the bottom surface of the cylindrical body is placed on the top end surface of the foundation concrete.

(Claim 1 )
(a) The grout holding material is formed of a cylindrical body placed around the anchor bolt on the top end surface of the foundation concrete inside the through hole of the foundation packing, and the grout to be injected and hardened around the anchor bolt is formed. A small section to be held is formed inside the cylindrical body. Therefore, the grout holding provided inside the through hole of the basic packing without injecting the grout to be injected and hardened around the anchor bolt passing through the through hole of the basic packing into the entire large section inside the through hole of the basic packing. It suffices if it is injected into a small section inside the cylindrical body of material, and the required amount of the grout can be reduced.

(Claim 2 )
(b) The grout holding material is provided with an annular groove along the circumferential direction of the cylindrical body on the bottom surface of the cylindrical body in contact with the top end surface of the basic concrete, and the cylindrical body is bonded to the top end surface of the basic concrete. An adhesive is applied to the annular groove. Accordingly, the bottom surface of the tubular body of the grout holding material is closely attached to the top end surface of the basic concrete without any gap, and the outflow of the grout that is injected and hardened around the anchor bolt inside the tubular body can be prevented. The grout does not flow out to the outside through the ventilation holes of the base packing.

  At this time, the adhesive for adhering the grout tubular body to the top end surface of the foundation concrete is applied to the annular groove on the bottom surface of the tubular body and is placed inside the annular groove. There is no risk of scraping off in the process of bonding to the top edge of concrete. When the bottom surface of the cylindrical body is placed on the top end surface of the foundation concrete, the adhesive applied to the annular groove hangs down on the top end surface of the foundation concrete due to gravity and is reliably attached.

(Claim 3 )
(c) Applying an adhesive to the bottom surface of the foundation packing, placing the bottom surface of the foundation packing on the top end surface of the foundation concrete, and placing the cylindrical body of the grout holding material inside the through hole of the foundation packing. A step of placing the anchor bolt around the top end surface of the concrete, and a step of injecting a grout of a curable liquid filler into a small section of the tubular body of the grout holding material and curing the grout around the anchor bolt. And have. As a result, the above-described operational effect (a) is achieved.

(Claim 4 )
(d) In the above (c) , an annular groove is provided along the periphery of the tubular body on the bottom surface of the tubular body of the grout holding material, and an adhesive is applied to the annular groove on the bottom surface of the tubular body, The bottom surface of this cylindrical body is placed on the top end surface of the foundation concrete. As a result, the above-described operational effect (b) is achieved.

FIG. 1 is a schematic view showing a basic packing. FIG. 2 is a schematic view showing a state in which an adhesive is applied to the basic packing. FIG. 3 is a schematic view showing a grout holding material. FIG. 4 is a schematic view showing a state in which an adhesive is applied to the grout holding material. FIG. 5 is a schematic view showing a state in which the grout is injected around the anchor bolt of the grout holding material placed inside the foundation packing.

  The foundation packing 10 shown in FIG. 1 is provided continuously on the top end surface 1A of the foundation concrete 1 (FIG. 5) along the outer periphery of the base of a building such as a unit building. The foundation of the building is placed on the top end surface 1A of the foundation concrete 1 via the foundation packing 10, and is anchored to the foundation concrete 1 by anchor bolts 2 planted in the foundation concrete 1 and passing through through holes 13 described later. 1 is fixed.

  As shown in FIG. 1, for example, the basic packing 10 described in JP-A-2003-301532, JP-A-2005-330798, etc. can be used. That is, the base packing 10 usually has a thickness of 10 to 30 mm and a width of 70 to 200 mm. The length is as long as about 500 to 2000 mm, which are connected in series, and in some cases, the length is appropriately cut. The material can be rigid or somewhat elastic, for example, synthetic resin, rubber, metal, ceramic or the like.

  The base packing 10 is formed with a large number of ventilation holes 11 that pass through in the width direction. Furthermore, each vent hole 11 has an open portion 12 formed on one of the upper and lower wall surfaces. In addition, a rectangular through hole 13 through which the anchor bolt 2 passes is formed continuously over the entire length of the base packing 10 in the center of the plane. In this manner, since the foundation packing 10 interposed between the concrete foundation 1 and the foundation of the building has a large number of air holes 11, air can be circulated through the holes, and the floor floor Ventilation can be achieved. Furthermore, since either the upper surface or the lower surface of the vent hole 11 has an open shape, it is rich in air permeability, and the contact surface of the concrete foundation 1 or the foundation of the building can be dried.

  As shown in FIG. 2, when the bottom surface 10 </ b> A of the foundation packing 10 is placed on the top end surface 1 </ b> A of the foundation concrete 1, the foundation packing 10 applies an adhesive 14 to the bottom surface 10 </ b> A of the foundation packing 10.

  Hereinafter, in order to prevent a large bending stress from acting on a portion of the anchor bolt 2 protruding from the foundation concrete 1 when the building moves in a horizontal direction due to a horizontal force such as an earthquake or a typhoon, The grout holding material 20 that holds the grout 3 to be cured by injection will be described. The grout 3 is a curable liquid filler, and is made of, for example, a two-component curable epoxy resin in which a main agent and a curing agent are mixed.

  As shown in FIG. 3, the grout holding member 20 is formed in the through hole 13 of the foundation packing 10 placed around the anchor bolt 2 on the top end surface 1 </ b> A of the foundation concrete 1 inside the through hole 13 of the foundation concrete 10. It consists of a cylindrical body 21 having a smaller frame size than the hole size. The grout holding member 20 forms a small section 22 inside the cylindrical body 21 for holding the grout 3 to be injected and hardened around the anchor bolt 2. The cylindrical body 21 consists of hollow cylinders, such as a square cylinder.

  As shown in FIGS. 3 and 4, the grout holding material 20 has an annular groove 23 along the entire circumference in the circumferential direction of the cylindrical body 21 on the bottom surface 21 </ b> A of the cylindrical body 21 that is in contact with the top end surface 1 </ b> A of the basic concrete 1. Provided. When the bottom surface 21 </ b> A of the tubular body 21 is placed on the top end surface 1 </ b> A of the foundation concrete 1, an adhesive 24 that adheres the bottom surface 21 </ b> A of the tubular body 21 to the top end surface 1 </ b> A of the foundation concrete 1 is applied to the annular groove 23. The

  Therefore, the construction method of the foundation structure of the building using the foundation packing 10 and the grout holding material 20 is as follows.

  (1) The adhesive 14 is applied to the bottom surface 10A of the base packing 10 (FIG. 2). The bottom surface 10 </ b> A of the foundation packing 10 is placed on and bonded to the top end surface 1 </ b> A of the foundation concrete 1.

  (2) The adhesive 24 is applied to the annular groove 23 on the bottom surface 21A of the cylindrical body 21 in the grout holding material 20 (FIG. 4). The bottom surface 21 </ b> A of the cylindrical body 21 is placed and bonded around the anchor bolt 2 on the top end surface 1 </ b> A of the foundation concrete 1 inside the through hole 13 of the foundation packing 10. When the bottom surface 21A of the cylindrical body 21 is placed on the top end surface 1A of the foundation concrete 1, the adhesive 24 applied to the annular groove 23 hangs down on the top end surface 1A of the foundation concrete 1 due to gravity and adheres securely. become.

  (3) As shown in FIG. 5, the grout 3 loaded in the injection container 4 is injected into the small section 22 of the tubular body 21 of the grout holding material 20, and the grout 3 is cured around the anchor bolt 2. .

Therefore, according to the present embodiment, the following operational effects can be obtained.
(a) The grout holding material 20 is composed of a cylindrical body 21 placed around the anchor bolt 2 on the top end surface 1A of the foundation concrete 1 inside the through hole 13 of the foundation packing 10, and the anchor bolt 2 The small section 22 holding the grout 3 to be injected and hardened around is formed inside the cylindrical body 21. Accordingly, the grout 3 to be injected and hardened around the anchor bolt 2 passing through the through-hole 13 of the foundation packing 10 is not injected into the entire area of the large section inside the through-hole 13 of the foundation packing 10, and the through-hole of the foundation packing 10. It is sufficient to inject into the small section 22 inside the cylindrical body 21 of the grout holding member 20 provided inside 13, and the necessary amount of the grout 3 can be reduced.

  (b) The grout holding material 20 is provided with an annular groove 23 along the circumferential direction of the cylindrical body 21 on the bottom surface 21A of the cylindrical body 21 in contact with the top end surface 1A of the foundation concrete 1. An adhesive 24 that adheres to the top end surface 1 </ b> A of the foundation concrete 1 is applied to the annular groove 23. Accordingly, the bottom surface 21A of the tubular body 21 of the grout holding member 20 is brought into close contact with the top end surface 1A of the foundation concrete 1 without any gap, and the outflow of the grout 3 that is injected and hardened around the anchor bolt 2 inside the tubular body 21. Can be prevented. The grout 3 does not flow out to the outside through the vent hole 11 of the base packing 10.

  At this time, the adhesive 24 that bonds the tubular body 21 of the grout 3 to the top end surface 1A of the foundation concrete 1 is applied to the annular groove 23 on the bottom surface 21A of the tubular body 21 and is left in the annular groove 23. Therefore, in the process of bonding the bottom surface 21 </ b> A of the cylindrical body 21 to the top end surface 1 </ b> A of the foundation concrete 1, there is no possibility of being scraped off. When the bottom surface 21A of the cylindrical body 21 is placed on the top end surface 1A of the foundation concrete 1, the adhesive 24 applied to the annular groove 23 hangs down on the top end surface 1A of the foundation concrete 1 due to gravity and reliably adheres. To become.

  (c) Applying the adhesive 14 to the bottom surface 10A of the foundation packing 10, placing the bottom surface 10A of the foundation packing 10 on the top end surface 1A of the foundation concrete 1, and the cylindrical body 21 of the grout holding material 20 In the inside of the through hole 13 of the packing 10, the step of placing the anchor bolt 2 around the top end face 1 </ b> A of the foundation concrete 1, and the small section 22 of the tubular body 21 of the grout holding material 20 are provided with a curable liquid filler. Injecting the grout 3 and hardening the grout 3 around the anchor bolt 2. As a result, the above-described operational effect (a) is achieved.

  (d) In the above (c), the bottom surface 21A of the tubular body 21 of the grout holding member 20 is provided with an annular groove 23 along the periphery of the tubular body 21, and the annular groove on the bottom surface 21A of the tubular body 21 is provided. The adhesive 24 is applied to 23, and the bottom surface 21 </ b> A of the cylindrical body 21 is placed on the top end surface 1 </ b> A of the foundation concrete 1. As a result, the above-described operational effect (b) is achieved.

  The grout holding material 20 is composed of a cylindrical body 21 placed around the anchor bolt 2 on the top end surface 1A of the foundation concrete 1, and the grout 3 injected and cured around the anchor bolt 2 is formed into a cylindrical body. It can apply to what hold | maintains not only what is hold | maintained inside 21 but the grout which is inject | pour-hardened around the anchor bolt widely planted in general concrete inside a cylindrical body.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

The present invention relates to a building foundation in which a building placed on the top end surface of a foundation concrete via a foundation packing is fixed to the foundation concrete by anchor bolts planted in the foundation concrete and passing through the through holes of the foundation packing. In the structure, a grout of a curable liquid filler comprising a cylindrical body placed around the anchor bolt on the top end surface of the foundation concrete inside the through-hole of the foundation packing and injected and cured around the anchor bolt. The grout holding material is formed by forming a small section for holding the inside of the cylindrical body. Thereby, the required amount of grout to be injection-hardened around the anchor bolt passing through the through hole of the basic packing can be reduced.

DESCRIPTION OF SYMBOLS 1 Basic concrete 1A Top end surface 2 Anchor bolt 3 Grout 10 Foundation packing 10A Bottom face 13 Through hole 14 Adhesive 20 Grout holding material 21 Cylindrical body 21A Bottom face 22 Small division 23 Annular groove 24 Adhesive

Claims (4)

In the foundation structure of the building in which the building placed on the top end surface of the foundation concrete via the foundation packing is fixed to the foundation concrete by anchor bolts implanted in the foundation concrete and passing through the through holes of the foundation packing,
Inside the through hole of the foundation packing, it is composed of a cylindrical body placed around the anchor bolt on the top end surface of the foundation concrete, and holds a grout of a curable liquid filler that is injected and cured around the anchor bolt. A basic structure of a building comprising a grout holding material in which a small section is formed inside the cylindrical body. The grout holding material is provided with an annular groove along the circumferential direction of the cylindrical body on the bottom surface of the cylindrical body that is in contact with the top end surface of the foundation concrete, and adheres the cylindrical body to the top end surface of the foundation concrete. The building foundation of claim 1 , wherein an agent can be applied to the annular groove. It is a construction method of the foundation structure of the building according to claim 1 ,
Applying an adhesive to the bottom surface of the foundation packing and placing the bottom surface of the foundation packing on the top end surface of the foundation concrete;
Placing the tubular body of the grout holding material around the anchor bolt on the top end surface of the foundation concrete inside the through hole of the foundation packing;
Injecting a grout of a curable liquid filler into a small section of the tubular body of the grout holding material, and curing the grout around the anchor bolt ;
A method for constructing a foundation structure of a building, comprising: a step in which a foundation of a building is placed on a top end surface of the foundation concrete through foundation packing and fixed to the foundation concrete with the anchor bolt after the injection of the grout . The bottom surface of the tubular body of the grout holding material is provided with an annular groove along the periphery of the tubular body, and an adhesive is applied to the annular groove on the bottom surface of the tubular body. The construction method of the foundation structure of the building of Claim 3 mounted in the top | upper end surface of concrete.

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