JP4897236B2 - Bonding structure to the foundation of building unit - Google Patents

Description

  The present invention relates to a structure for joining a building unit to a foundation in which a building unit disposed on the foundation is fastened and fixed using anchor bolts and nuts protruding upward from the upper end surface of the foundation. .

  Conventionally, a floor member or the like is usually fastened and fixed on the foundation using anchor bolts and nuts that protrude upward from the upper end surface of the foundation (see, for example, Patent Document 1).

Also, in the unit building, the floor beam of the building unit is arranged on the foundation, and the anchor bolt protruding from the upper end surface of the foundation is inserted into the bolt insertion hole provided in the floor beam to The building unit is joined to the foundation by screwing and tightening a nut to a portion protruding from the base.
JP 2001-65050 A

  By the way, in such a unit building, since many anchor bolts are provided, in order to prevent a load from concentrating only on a part of the anchor bolts, a gap between the inner surface of the bolt insertion hole and the anchor bolts is used. It is considered that a liquid grout agent is injected into the resin and cured.

  However, since the lower surface of the floor beam cannot be in close contact with the upper end surface of the foundation without a gap, even if the grout agent is injected into the gap between the inner surface of the bolt insertion hole and the anchor bolt, the lower surface of the floor beam and the foundation There was a problem that the grouting agent leaked from between the upper end surfaces of the two.

  In view of the above, an object of the present invention is to provide a joint structure to the foundation of a building unit that can surely prevent leakage of the grout agent from between the lower surface of the floor beam and the upper end surface of the foundation.

In order to achieve this object, the present invention provides an anchor bolt having a lower portion embedded in a foundation and an upper portion protruding from the upper end surface of the foundation, and a building unit placed on the upper end surface of the foundation. The upper part of the anchor bolt is inserted into the bolt insertion hole of the floor beam, and a grout agent is filled in the gap between the inner surface of the bolt insertion hole and the anchor bolt, and the floor beam above the anchor bolt In the joint structure to the foundation of the building unit for joining and fixing the floor beam on the foundation by screwing and tightening a nut to a portion protruding from the anchor reinforcing plate embedded and fixed to the foundation, An upper portion of the anchor bolt is inserted into an annular elastic member interposed between the foundation and the floor beam, an adhesive layer is formed on the lower surface of the annular elastic member, and With an annular space is formed between the inner peripheral surface and the anchor bolt Jo elastic member, filling the grout material into the annular space, wherein the anchor reinforcing plate is fixedly embedded on the lower is the basic The anchor bolt penetrates the anchor reinforcing plate, the annular elastic member is interposed between the anchor reinforcing plate and the floor beam, and the annular elastic member is interposed between the anchor layer and the anchor layer. It is characterized by having a structure for joining to the foundation of a building unit fixed on a reinforcing plate .

  According to this configuration, since the annular elastic member is in close contact with the lower surface of the floor beam and the upper end surface of the foundation, even if the grout agent is injected into the annular space or the gap between the inner surface of the bolt insertion hole and the anchor bolt, It is possible to reliably prevent the grouting agent from leaking between the lower surface of the floor beam and the upper end surface of the foundation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In FIG. 1, 1 is a cloth foundation, 1a is an upper end surface of the cloth foundation 1, 2 is an anchor reinforcement plate disposed on the cloth foundation 1, and the lower part is slightly embedded and fixed to the cloth foundation 1, and 3 is a lower part of the cloth foundation. An anchor bolt embedded in the foundation 1. In FIG. 1, the fabric base 1 shows a corner portion.

  In addition, the upper portion of the anchor bolt 3 protrudes upward from the upper end surface 1 a, penetrates the anchor reinforcing plate 2, and protrudes above the upper end surface 1 a of the fabric foundation 1 and the anchor reinforcing plate 2. In addition, when forming the fabric foundation 1, the anchor reinforcement plate 2 is slightly embed | buried so that the lower part may closely_contact | adhere in the fabric foundation 1 before the fabric foundation 1 hardens | cures. Accordingly, there is no gap between the lower surface of the anchor reinforcing plate 2 and the fabric foundation 1 so that the liquid grout agent leaks.

  A band-shaped elastic seal member 4 is disposed on the upper end surface 1 a of the fabric foundation 1 and the anchor reinforcement plate 2. The elastic seal member 4 is disposed inside the fabric foundation 1 with respect to the anchor bolt 3.

  Moreover, on the anchor reinforcement plate 2, an annular seal member 5 through which the upper part of the anchor bolt 3 is inserted is disposed. As shown in FIG. 2, the annular seal member 5 includes an annular elastic member 5a (see FIG. 3A) formed compressible from foamed urethane, and an adhesive layer 5b formed on the lower surface of the annular elastic member 5a. (See FIG. 3B). The annular seal member 5 is adhesively fixed on the anchor reinforcing plate 2 via the adhesive layer 5b.

  The annular seal member 5 and the anchor bolt 3 are provided concentrically, and an annular space 6 as shown in FIGS. 1 and 2 is formed between the inner surface (reference numeral omitted) of the annular seal member 5 and the anchor bolt 3. Has been.

  A building unit 7 is disposed on the fabric foundation 1. FIG. 1 illustrates a corner portion of the building unit 7. A column 8 is provided at the corner of the building unit 7, and floor beams 9 and 10 are fixed to adjacent vertical surfaces 8 a and 8 b at the lower end of the column 8.

  The floor beam 9 includes a U-shaped bracket 11 welded and fixed to the vertical surface 8 a at the lower end portion of the support column 8, and a floor beam body 12 having one end portion joined to the bracket 11. The floor beam main body 12 is fixed to the bracket 11 by welding.

  Similarly, the floor beam 10 includes a U-shaped bracket 13 welded and fixed to the vertical surface 8 b at the lower end portion of the support column 8, and a floor beam body 14 having one end portion joined to the bracket 13. The floor beam main body 14 is fixed to the bracket 13 by welding. Further, the brackets 11 and 13 and the floor beam main bodies 12 and 14 are open toward the inside of the building unit 5.

  Further, a lower plate portion 10 a including a lower plate portion 14 a of the floor beam main body 14 and a lower plate portion 13 a of the bracket 13 is formed at an end portion of the floor beam 10 on the column 8 side. Bolt insertion holes 15 are formed in the lower plate portion 10a so as to penetrate vertically.

  The upper part of the anchor bolt 3 is inserted into the bolt insertion hole 15 of the floor beam 10 as shown in FIG. In addition, the lower plate portion 10 a of the floor beam 10 is placed on the upper end surface 1 a of the fabric foundation 1 and the anchor reinforcement plate 2 to compress the annular seal member 5.

  As a result, the annular seal member 5 is in airtight contact with the lower surface of the lower plate portion 10 a of the floor beam 10 and the upper surface of the anchor reinforcement plate 2. Although the illustration of the deformed state is omitted, the elastic seal member 4 shown in FIG. 1 is also compressed by the floor beam 10 to form the lower surface of the lower plate portion 10a, the upper end surface 1a of the fabric foundation 1, and the anchor reinforcement plate 2. It is airtight.

  In addition, the grout agent 16 is filled and cured in the annular space 6 and the gap (reference numeral omitted) formed between the bolt insertion hole 15 and the anchor bolt 3.

Further, a fastening plate 17, a washer 18, and a nut 19 are disposed above the lower plate portion 10a, and an upper portion of the anchor bolt 3 is inserted into the bolt insertion hole 17a and the washer 18 of the fastening plate 17. The nut 19 is screwed onto the anchor bolt 3 from above the washer 18, and the nut 19 is tightened, whereby the lower plate portion 10 a of the floor beam 10 is bonded and fixed onto the fabric foundation 1.
[Method of joining building unit 8 to fabric foundation 1]
Next, a method for joining the building unit 8 to the fabric foundation 1 will be described.

  Before placing the floor beam 10 of the building unit 8 on the fabric foundation 1, the annular seal member 5 is disposed concentrically with the anchor bolt 3 as shown in FIGS. 1 and 2, and the annular seal member 5 is anchored. On the reinforcing plate 2, the adhesive layer 5b is adhered and fixed in an airtight manner. Thereby, an annular space 6 is formed between the anchor bolt 3 and the annular seal member 5.

  1 and 2, the nozzle 20a of the tube-shaped injection container 20 is directed toward the annular space 6, and the liquid grout agent 16 is annularly formed from the nozzle 20a of the injection container 20 as shown in FIG. Inject into the space 6. The grouting agent 16 is injected so that the upper surface 16a is lower than the upper surface 5c of the annular seal member 5 by a predetermined amount (predetermined dimension or predetermined height) X, for example, about 2 mm.

  The grout agent 16 was produced by mixing the main agent and the curing agent on site, and the grout agent having the conditions shown in Table 1 was used.

表１において、グラウト剤１６の空気中養生での可使用時間すなわち使用可能な時間は、外気温度が２０°Ｃの場合に約１４０分，外気温度が２５°Ｃの場合に約５０分，外気温度が３０°Ｃの場合に約４０分であり、水中養生の場合に外気温度が３０°Ｃの場合に約１２０分である。しかも、グラウト剤１６の硬化時間は、外気温度が２０°Ｃの場合に約２４時間、外気温度が３０°Ｃの場合に約１２時間である。尚、グラウト剤１６の条件としては、この表１の数値のものに限定されるものではない。

In Table 1, the usable time in the air curing of the grout agent 16, that is, the usable time is about 140 minutes when the outside air temperature is 20 ° C., about 50 minutes when the outside air temperature is 25 ° C., outside air It is about 40 minutes when the temperature is 30 ° C., and about 120 minutes when the outside air temperature is 30 ° C. in the case of underwater curing. Moreover, the curing time of the grout agent 16 is about 24 hours when the outside air temperature is 20 ° C. and about 12 hours when the outside air temperature is 30 ° C. The conditions of the grout agent 16 are not limited to those shown in Table 1.

  And after inject | pouring such a grout agent 16 in the annular space 6, as shown to Fig.4 (a), while inserting the upper part of the anchor bolt 3 in the bolt insertion hole 15a of the lower board part 10a, The lower plate portion 10 a is placed on the upper end surface 1 a of the fabric foundation 1 and the anchor reinforcement plate 2.

  Thereby, the annular seal member 5 is in close contact with the lower plate portion 10a, and the space between the annular seal member 5 and the lower plate portion 10a becomes airtight, and the annular seal member 5 is compressed by the weight of the building unit 8, The grout agent 16 in the annular seal member 5 is pushed out. The extruded grout agent 16 is filled between the anchor bolt 3 and the bolt insertion hole 15 of the lower plate portion 10a and slightly overflows on the lower plate portion 10a.

  Then, it is allowed to stand for a predetermined time (for example, 10 minutes) or more, and it is confirmed whether or not the grout agent 16 leaks from between the annular seal member 5 and the anchor reinforcing plate 2. When the grouting agent 16 is leaking, the upper surface of the grouting agent 16 is lowered as shown in FIG.

  However, since the sealing member 5 is hermetically bonded and fixed to the anchor reinforcing plate 2, the grout agent 16 hardly leaks between the annular sealing member 5 and the anchor reinforcing plate 2. In the event of a leak, a sealant is applied to the periphery of the mating portion of the lower plate portions 13a and 14a constituting the lower plate portion 10a, and then the grout agent 16 is further added as shown in FIG. Raise the top surface of 16 a little.

  Thereafter, the fastening plate 17 and the washer 18 are disposed on the lower plate portion 10a as shown in FIG. 6, and the bolt insertion hole 17a and the washer 18 of the fastening plate 17 are placed in the fastening plate 17 as shown in FIG. After inserting the anchor bolt 3, a nut 19 is screwed onto the anchor bolt 3 from above the washer 18, and the nut 19 is tightened so that the lower plate portion 10 a of the floor beam 10 is bonded and fixed onto the cloth foundation 1.

If the annular seal member 5 is hermetically bonded to the upper end surface 1a of the fabric base 1, the grout agent 16 injected into the annular seal member 5 is not necessarily provided with the anchor reinforcing plate 2 but the annular space. Leakage from 6 can be reliably prevented.
(Modification)
In the method for joining the building unit 8 to the cloth foundation 1 described above, the grout agent 16 is injected into the annular seal member 5 before the building unit 8 is placed on the cloth foundation 1. It is not limited to.

  For example, as shown in FIG. 7A, the anchor bolt 3 is inserted into the bolt insertion hole 15a of the lower plate portion 10a of the floor beam 10, and the inner surface of the anchor bolt 3 and the bolt insertion hole 15a of the lower plate portion 10a. The lower plate portion 10a of the floor beam 10 is disposed on the fabric foundation 1 to compress the annular seal member 5 on the anchor reinforcing plate 2, and then the anchor bolt Alternatively, the grout agent 16 may be injected from above into the gap 21 between 3 and the inner surface of the bolt insertion hole 15a of the lower plate portion 10a as shown in FIG.

  In this case, even if the anchor reinforcing plate 2 is not necessarily provided, the space between the lower surface of the lower plate portion 10a of the floor beam 10 and the upper end surface 1a of the fabric foundation 1 is hermetically sealed by the annular seal member 5, It is possible to reliably prevent the grout agent 16 injected into the seal member 5 from leaking from the annular space 6.

  As described above, in the joint structure to the foundation (fabric foundation 1) of the building unit 8 according to the embodiment of the present invention, the anchor bolt having the lower part embedded in the foundation and the upper part protruding from the upper end surface of the foundation. 3, the upper part of the anchor bolt 3 is inserted into the bolt insertion hole 15 of the floor beam 10 of the building unit 8 placed on the upper end surface 1 a of the foundation (cloth foundation 1), and the bolt insertion hole 15 A grout agent is filled in the gap between the inner surface of the bolt and the anchor bolt 3. Moreover, a nut 19 is screwed and tightened to a portion protruding from the floor beam (lower plate portion 10a) above the anchor bolt 3, so that the floor beam 10 is placed on the foundation (cloth foundation 1). Bonded and fixed. The upper part of the anchor bolt 3 is inserted into the annular elastic member (5a) interposed between the foundation (cloth foundation 1) and the floor beam 10, and the inner periphery of the annular elastic member (5a). An annular space 6 is formed between the surface and the anchor bolt 3, and the grout agent 16 is filled in the annular space 6.

  According to this configuration, since the annular elastic member (5a) is in close contact with the lower surface of the floor beam 10 and the upper end surface 1a of the foundation (cloth foundation 1), the grouting agent 16 is placed in the annular space 6 or the inner surface of the bolt insertion hole 15. Even if it is injected into the gap between the anchor bolts 3, it is possible to reliably prevent the grouting agent from leaking from between the lower surface of the floor beam and the upper end surface of the foundation.

  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.

It is a principal part disassembled perspective view which shows the joining structure to the foundation of the building unit which concerns on this invention. It is sectional drawing which shows the relationship between the anchor bolt of FIG. 1, an annular sealing member, and a grout agent. (A) is a top view of the cyclic | annular sealing member of FIG. 1, FIG. 2, (b) is sectional drawing of (a). 2A is a cross-sectional view showing a state in which a floor beam of a building unit is placed on the foundation and the anchor reinforcing plate 2 in FIG. 2 and the annular seal member is compressed, and FIG. It is sectional drawing which shows the example in a certain case. It is explanatory drawing in the case of adding a grout agent further, when there is leakage of the grout agent of FIG.4 (b). FIG. 4A is an exploded explanatory view of a fixing means such as a nut for fixing the floor beam in FIG. 4A, and FIG. 5B is a cross-sectional view when the floor beam is fixed on the foundation with a nut or the like. (A) is sectional drawing which shows the other example of the procedure which inject | pours a grout agent, (b) is sectional drawing which shows the state which inject | poured the grout agent 16 between the bolt penetration hole of (a), and an anchor bolt. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cloth foundation 1a ... Upper end surface 3 ... Anchor bolt 5 ... Ring seal member 5a ... Ring elastic member 6 ... Ring space 8 ... Building unit 10 ... Floor beam 10a ... Lower plate part 15 ... Bolt insertion hole 16 ... Grout agent

Claims (3)

An anchor bolt having a lower portion embedded in the foundation and an upper portion protruding from the upper end surface of the foundation is provided, and the upper portion of the anchor bolt is inserted into the bolt insertion hole of the floor beam of the building unit placed on the upper end surface of the foundation. Is inserted, and a grout agent is filled in the gap between the inner surface of the bolt insertion hole and the anchor bolt, and a nut is screwed onto the portion protruding from the floor beam above the anchor bolt and tightened In the joint structure to the foundation of the building unit that joins and fixes the floor beam onto the foundation,
An anchor reinforcement plate embedded and fixed to the foundation is provided,
The upper part of the anchor bolt is inserted into an annular elastic member interposed between the foundation and the floor beam,
An adhesive layer is formed on the lower surface of the annular elastic member, and an annular space is formed between the inner peripheral surface of the annular elastic member and the anchor bolt, and the grout agent is filled in the annular space ,
The anchor reinforcing plate has a lower portion embedded and fixed to the upper portion of the foundation, the anchor bolt penetrates the anchor reinforcing plate, and the annular elastic member is interposed between the anchor reinforcing plate and the floor beam. And the annular elastic member is fixed onto the anchor reinforcing plate via the adhesive layer . 2. The structure for joining a foundation of a building unit according to claim 1, wherein when the annular elastic member is compressed by the weight of the building unit, the grout agent injected into the annular space is transferred from the gap to the floor beam. A structure for joining to the foundation of a building unit , wherein the grout agent is hardened in a state of overflowing on a floor beam . The joint structure to the foundation of the building unit according to claim 2, wherein the floor beam has a U-shaped bracket fixed to an adjacent vertical surface of a lower end portion of the column of the building unit and an end portion in the bracket. A foundation of a building unit having a U-shaped floor beam main body fitted and the bolt insertion hole being formed across a lower plate portion of the bracket and a lower plate portion of the floor beam main body. Bonding structure to.

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