JP2000220149A - Foundation concrete for structural body and fixing method for structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide foundation concrete for a structural body and a fixing method for the structural body for which grouting work can be performed easily. SOLUTION: At the predetermined position of a foundation concrete 11 for an house unit, a sheath tube 21 having an extended tube 22 is installed. At this time, an opening 21a at the upper end of the sheath tube 21 must be located at the upper end surface 11b of the foundation concrete 11, and also a grout inlet 22a of the extended tube 22 must be located at the inner side surface 11a of the foundation concrete 11. Grout 33 is filled from a grout inlet 22a to of the extended tube 22 to the inside of the sheath tube 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation concrete of a structure having a fixing hole for inserting an anchor formed in the structure and a method of fixing the structure.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
For example, a method as disclosed in JP-A-3-151431 has been adopted. That is,
A sheath tube 53 is embedded in the foundation concrete 51, and the housing unit 52 is placed on the foundation concrete 51 by inserting an anchor bolt 55 projecting below the housing unit 52 into the sheath tube 53. Was. And the basic concrete 51 and the housing unit 52
The grout 56 is filled into the sheath tube 53 from a grout injection part (not shown) via an annular spacer 54 between the sheath tube 53 and the grout 56. Therefore, the grout 56 is filled from above the sheath tube 53.

[0003]

However, in the foundation concrete 51 of the conventional structure, the bottom of the sheath tube 53 is closed. Therefore, rainwater or the like easily accumulates in the sheath tube 53. When the rainwater or the like accumulates, when the grout 56 is filled in the sheath tube 53, the amount of water in the grout 56 is changed, and the grout 56 after curing is removed. There was a problem that the strength was deteriorated.

When the grout 56 is filled from the top of the sheath tube 53 as described above, even if the grout 56 is injected with the air nest formed at the bottom of the sheath tube 53, it cannot be confirmed. As a result, there is a problem that the strength of the grout 56 is reduced.

Further, in the conventional method, grout 56 must be injected through a narrow space between the foundation concrete 51 and the housing unit 52, and there is a problem that workability is poor.

The present invention has been made by paying attention to the problems existing in the prior art as described above. An object of the present invention is to provide a foundation concrete of a structure and a method for fixing the structure, which can prevent the strength of the grout after hardening from being deteriorated by being mixed with water retained in a sheath tube when the grout is filled. It is in.

It is another object of the present invention to provide a foundation concrete for a structure and a method for fixing the structure, which can suppress the occurrence of air nests. It is another object of the present invention to provide a foundation concrete for a structure and a method for fixing the structure, which improves the workability of installing the housing unit.

[0008]

According to the present invention, there is provided a foundation concrete of a structure having a fixing hole for inserting an anchor formed in the structure, wherein the concrete is opened laterally from a lower portion of the fixing hole. The grout injection port is provided.

In the present invention, since rainwater or the like is discharged from the grout inlet, it hardly accumulates in the fixing hole. Therefore, it is possible to prevent the strength of the cured grout from being deteriorated by mixing with the retained water when filling the grout. Further, since the grout is filled into the fixing hole from below the fixing hole via the grout inlet, it is possible to suppress the generation of air nests in the fixing hole. further,
Since grout is injected from the injection port of the extension pipe, workability in construction is improved.

In the above configuration, if the structure is a housing unit, the workability in construction of a house is improved.
At this time, if the fixing hole is formed by embedding the sheath tube, the fixing hole can be easily provided. Here, burying means a so-called buried state.

If the grout inlet is formed by an extension tube extending laterally from the lower end of the sheath tube, the grout inlet is formed simultaneously with the formation of the fixing hole, so that the grout inlet is easily provided. Can be

[0012]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2,
A plurality of sheathed sheath tubes 21 are buried in the foundation concrete 11 at appropriate intervals, and the upper end opening 21a faces upward. The fixing hole 23 is formed by the sheath tube 21.
Is configured. The bottom part 21b of the sheath tube 21 is closed. As with the sheath tube 21, the sheath is treated,
The extension pipe 22 having a smaller diameter than the sheath pipe 21 is joined to the lower end of the sheath pipe 21 by welding, and the tip opening is located on the inner side surface 11 a of the foundation concrete 11. This extension pipe 22
Constitute the grout inlet 22a.

When the housing unit 12 is installed on the foundation concrete 11, each anchor bolt 32 projecting below the housing unit 12 is inserted into a fixing hole 23 in the sheath tube 21. In addition, so as to surround the anchor bolt 32,
An annular spacer 31 is interposed between the foundation concrete 11 and the housing unit 12. In this state, the extension pipe 22 opening on the inner side surface 11a of the foundation concrete 11,
That is, a grout injection pipe (not shown) is connected to the grout injection port 22a, and grout 33 is injected into the inside of the sheath tube 21, that is, the fixing hole 23 to the upper end thereof through the grout injection port 22a. Therefore, the grout 33 is cured and hardened in this state, and the anchor bolt 32
Is fixed.

Next, effects exerted by the above embodiment will be described. (1) According to the present embodiment, since grout 33 is injected into fixing hole 23 from grout injection port 22a opened on inner side surface 11a of base concrete 11, unlike the prior art, base concrete 11 and house unit 12 It is not necessary to fill the grout 33 in the fixing hole 23 through a narrow space between the two, and the workability required for filling the grout 33 is improved.

(2) In the present embodiment, water such as rainwater that has entered the fixing hole 23 is immediately discharged to the outside from the grout inlet 22a. Therefore, the bottom 21 of the sheath tube 21
Water such as rainwater does not stay in b. For this reason, when filling the grout 33, the retained water does not mix with the grout 33, and it is possible to prevent the strength of the cured grout 33 from deteriorating. Also, since rainwater and the like do not accumulate in the fixing holes 23, the grout 3
3 can be performed.

(3) In this embodiment, the grout 33
Is filled upward from the lower part of the fixing hole 23, so that the formation of air nests in the grout 33 can be suppressed, and the strength of the grout 33 can be prevented from being reduced as described above.

The above embodiment can be modified as follows. In the above embodiment, the grout inlet 2 of the extension pipe 22
2 a is formed on the inner side surface 11 a of the foundation concrete 11. This may be such that the grout injection port 22a opens to the outer side surface 11c of the foundation concrete 11.

In the above embodiment, the extension tube 22 is located at the bottom 21 b of the sheath tube 21. On the other hand, the amount of water staying in the bottom 21b depends on the grout 33 after curing.
If the amount does not affect the strength of
2 may be joined above the bottom 21b.

In the above embodiment, the sheath tube 21 and the extension tube 22 are joined by welding.
And the extension tube 22 may be integrally formed. In this case, it is convenient to form the parts 21 and 22 from a synthetic resin such as vinyl chloride.

In the above embodiment, the shape of the sheath tube 21 is cylindrical. This is not limited to a cylindrical shape, and does not matter the cross-sectional shape as long as it has a hollow tubular shape.

In the embodiment, the housing unit 12 is applied as the structure. This is a residential unit 1
However, the present invention is not limited to the embodiment 2, but may be applied to a structure such as a playground equipment such as a fixed bench, a swing, a slide, etc., when the structure is fixed to the foundation concrete.

The fixing hole 23 and the grout inlet 22
As a, a fixing hole and a grout injection port having an inner peripheral surface as a concrete surface are formed in the foundation concrete 11 by a drawing die without providing the sheath tube 21 or the like.

Even when changed as described above, the same effects as those of the above embodiment can be obtained.

[0024]

Since the present invention is configured as described above, it has the following effects. Claim 1 and Claim 5
According to the invention as set forth in claim 6, since the grout can be filled into the fixing hole from the grout injection port below the fixing hole, the construction is easy, and the strength of the grout due to air nests, water mixing, and the like. Drop can be prevented.

According to the second aspect of the present invention, grout filling work in building a house can be easily performed. According to the third aspect of the present invention, since the fixing holes formed in the foundation concrete are formed by embedding the sheath tube, the fixing holes can be easily provided.

According to the fourth aspect of the present invention, since the grout inlet is formed by the extension pipe, the grout inlet can be easily provided as in the third aspect.

[Brief description of the drawings]

FIG. 1 is an essential part cross-sectional view showing an installed state of a housing unit of the present embodiment.

FIG. 2 is a perspective view showing a sheath tube.

FIG. 3 is a perspective view showing a spacer.

FIG. 4 is a cross-sectional view of a main part showing an installation state of a conventional housing unit.

[Description of Signs] 11 ... foundation concrete for housing unit, 12 ... housing unit, 21 ... sheath tube, 22 ... extension tube, 22a ... grout inlet, 23 ... fixing hole, 32 ... anchor bolt, 3
3 ... grout.

Claims (6)

[Claims] 1. A foundation concrete of a structure provided with a fixing hole for inserting an anchor formed in the structure, wherein a grout inlet opening laterally from a lower portion of the fixing hole is provided. The foundation concrete of the featured structure. 2. The basic concrete for a structural body according to claim 1, wherein the structural body is a housing unit. 3. The foundation concrete for a structure according to claim 2, wherein the fixing hole is formed by burying a sheath tube. 4. The foundation concrete for a structure according to claim 3, wherein the grout inlet is formed by an extension tube extending laterally from a lower end of the sheath tube. . 5. A fixing hole in a foundation concrete of a structure,
A method for fixing a structure in which an anchor extending downward from a lower portion of a structure is inserted to fill grout into the fixing hole, wherein the grout is filled from a lower side of the fixing hole. How to fix the structure. 6. The method for fixing a structure according to claim 5, wherein a grout injection port is provided in the foundation concrete, which is opened laterally from a lower portion of the fixing hole, and the grout is filled from the injection port into the fixing hole. A method for fixing a structure, characterized in that: