JPH0115757B2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention covers building concrete with a heat insulating material,
Furthermore, the present invention relates to a sleeve structure that penetrates a concrete frame and has a heat insulating material covered with a steel liner plate.

[Prior art]

A conventional sleeve structure that penetrates a concrete wall and has a heat insulating material between the steel liner plate and the building concrete is shown in FIGS. 1 and 2. A sleeve 1 passes through a concrete wall comprising a thermal insulation material 4 between a steel liner plate 2 and a building concrete 3. In this case, in the example shown in FIG. 1A, the method of connecting the steel liner plate 2 and the sleeve 1 is as shown in the enlarged detailed view of section A shown in FIG. A connection structure is adopted in which a steel liner plate 2 is butt-welded 6 on the outer peripheral surface. In the example shown in FIG. 2, the steel liner plate 2 is connected to the outer peripheral surface of the sleeve 1 via a connecting collar 7 by fillet welding 8. However, the conventional connection structure between the sleeve 1 and the steel liner plate 2 has the following drawbacks. First, in the case of the example in Figure 1,
Aligning the grooves of the six welds between the steel liner plate 2 and the sleeve 1 is relatively easy when there is only one sleeve penetrating the concrete structure, but becomes extremely difficult when the number of sleeves penetrating increases. It was hot. In other words, it is originally difficult to accurately align and insert the sleeve 1 into the sleeve hole provided in the steel liner plate 2, and if an attempt is made to make the sleeve hole larger to facilitate insertion, the weld 6 The sleeve 1 and the steel liner plate become separated, making it difficult to align the grooves. When the number of sleeves 1 increases, alignment and insertion may be successful for one sleeve but not for another, or the steel liner may be bent between the sleeves, making alignment difficult. Bevel alignment may become extremely difficult if the welding heat from one sleeve causes the steel liner plate to expand thermally and the other sleeve holes do not fit properly. It was something like that.

In the case of the example shown in Fig. 2, the steel liner plate 2 is not welded directly to the sleeve 1 but to the connecting rib 8, so if the connecting rib is made sufficiently large, even if the sleeve hole is made larger than the sleeve. However, welding can be done well. Therefore, the drawbacks of the example shown in Fig. 1 above can be avoided, but since the welded portion 8 is a fillet, the deformation load of the steel liner plate 2 due to pressure and temperature changes, and the repetition of this deformation load, etc. There was a risk that strength problems would occur with respect to the load.

In addition, in both the examples shown in Fig. 1 and Fig. 2, when installing the steel liner plate 2 after pouring the building concrete 3, since the sleeve 1 protrudes outward from both sides of the building concrete 3, the building concrete 3 is poured. A hole for penetrating the sleeve must be provided in the formwork necessary for installation, and the sleeve 1 must be installed through this hole, which has the disadvantage that the formwork work is troublesome.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, provide a sleeve structure that is easy to install on-site, and has sufficient strength.

[Structure of the invention]

In the sleeve structure of the present invention, a through hole is formed in a wall body in which at least one side of a concrete wall is covered with a heat insulating material, and a steel liner is connected to the surface of the insulating material on the side opposite to the concrete wall and the circumferential surface of the through hole. It is made in a sleeve structure consisting of a plate and a sleeve, and the sleeve is composed of a main sleeve corresponding to the thickness of the concrete wall and a secondary sleeve corresponding to the thickness of the insulation material and steel liner plate. The main and sub-sleeves are welded to each other via a flange, and the sub-sleeve is welded to a steel liner plate.

[Effect]

Since the sub-sleeve can be moved at the flange portion, the sub-sleeve can be inserted into the sleeve hole of the steel liner with precise alignment.

In addition, the concrete formwork can be set up before installing the secondary sleeve, concrete is poured, and the secondary sleeve can be installed after removing the concrete formwork, so there is no need to provide holes in the concrete formwork for penetrating the sleeve. do not have.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in more detail with reference to the drawings. The same reference numerals are used for parts corresponding to those in the conventional example. FIG. 3 is a sectional view showing an embodiment of the sleeve structure of the present invention. Main sleeve 1a with a length equal to the thickness of the building concrete 3
is inserted into the building concrete 3, and a sub-sleeve 1b, which protrudes from the building concrete 3 surface and is approximately equal in thickness to the heat insulating material 4 and the steel liner plate 2, is welded by butt welding 10 to flanges 9 attached to both ends of this sleeve 1a. The sleeve 1 is constructed by the following steps. Further, a steel liner plate 2 is welded to the outer peripheral surface of the sub-sleeve 1b of the sleeve 1 by butt welding 6 using a backing metal 5.

FIGS. 4A and 4B are exploded views of one side of FIG. 3, and the on-site installation and assembly procedure of the sleeve of this embodiment will be explained based on these views. Reference numeral 11 in Figure 4B
1 shows the concrete formwork when pouring building concrete 3. The concrete formwork 11 is attached to the main sleeve 1a, which has a length equal to the thickness of the building concrete wall 3 and has flanges 9 at both ends.
They are joined by formwork setting bolts 12 passed through bolt holes drilled in the. Building concrete 3 is placed by pouring concrete into the concrete formwork 11 thus set. After curing the building concrete 3, remove the formwork setting bolts 12 and remove the concrete formwork 11. Next, as shown in FIG.
Bonded by 0. After that, a heat insulating material (insulating concrete) 4 is installed. Finally, the steel liner plate 2 having the through hole passing through the sub-sleeve 1b is joined by butt welding 6, and the sleeve 1 as shown in FIG.
On-site installation has been completed.

By the way, in this embodiment, the diameters D ₁ and D 2 of the sleeve 1a and the sub-sleeve 1b are such that D ₁ <D _{2 .}
There is a relationship between Therefore, if the allowable eccentricity diameter is d, then d=(D ₂ −D ₁ ), and the center point of D ₁ and D ₂ is allowed to be eccentric by the allowable eccentricity diameter d. Therefore, within this range d, the butt welding 6 of the secondary sleeve 1b and the steel liner 2 using the backing metal 5
The groove alignment of the sleeve 1a can be carried out regardless of the center point of the sleeve 1a, and the steel liner plate 2
Even in the case where a large number of sleeve holes are provided in the sleeve and a large number of sleeves must be installed, the eccentricity allowable diameter d with respect to butt welding of each sleeve is
Because of this, groove alignment can be easily carried out, making groove alignment work easier during on-site installation.

In addition to the order of assembling the sleeve 1 of the above embodiment, the following order of assembly may be adopted. Part 1 is to weld the steel liner plate 2 to the sub-sleeve 1b, then position the sub-sleeve 1b to the flange 9 of the main sleeve 1a, then install the heat insulating material 4, and attach the sub-sleeve 1b to the flange 9. Weld. In the second step, the steel liner plate 2 and the sub-sleeve 1b are temporarily assembled and the main sleeve 1a is positioned on the flange 9. Thereafter, the secondary sleeve 1b is removed from the steel liner plate 2, and the secondary sleeve 1b is welded to the flange 9. Next, the heat insulating material 4 is installed, and then the steel liner plate 2 is welded to the secondary sleeve 1b.

According to this embodiment, the sleeve 1 is replaced by the main sleeve 1.
A and a sub-sleeve 1b connected to the flanges 9 at both ends of this sleeve 1a, and this is a separate sleeve 1 that is assembled at the time of on-site installation, and there is an eccentricity tolerance between the main sleeve 1a and the sub-sleeve 1b. The provision of the diameter d facilitates groove alignment during butt welding of the sub sleeve 1b and the steel liner plate 2, and has the effect of improving on-site installation workability.
In addition, since the secondary sleeve 1b and the steel liner plate 2 are welded together by butt welding 6 using a backing metal 5,
This has the effect of providing sufficient strength to the sleeve structure. Furthermore, since the sleeve 1a has the same length as the thickness of the building concrete 3, the sleeve 1 can be easily installed without cutting the concrete formwork 11 midway or punching holes. This also has the effect of improving on-site installation workability.

"Effects of the Invention" According to the sleeve structure of the present invention described above, the sleeve is divided into a main sleeve and a sub-sleeve, and the sub-sleeve can be moved at the flange with respect to the main sleeve fixed in concrete. Therefore, the sub-sleeve can be inserted into the sleeve hole of the steel liner plate with accurate alignment. Therefore, the grooves of the sleeve and the steel liner plate can be easily aligned.

Moreover, since this groove alignment becomes easy, the welding method as shown in FIG. 2 becomes unnecessary.

Furthermore, the concrete formwork can be set up before installing the secondary sleeve to the main sleeve, concrete is poured, and the secondary sleeve can be installed after removing the concrete formwork, so the sleeve does not penetrate the concrete formwork. There is no need to provide a hole for penetrating the sleeve, which facilitates formwork work.

As a result of the above, it is possible to provide a sleeve structure that is easy to install on-site and has sufficient strength.

[Brief explanation of drawings]

Fig. 1A is a sectional view showing an example of a conventional sleeve structure, Fig. 1B is a partially enlarged view of A, Fig. 2 is a sectional view showing another example of a conventional sleeve structure, and Fig. 3 is a sectional view of a conventional sleeve structure. 4A and 4B are exploded views of the sleeve shown in FIG. 3; 1a...Main sleeve, 1b...Secondary sleeve, 2
... Steel liner plate, 3 ... Building concrete, 4
...Insulation material, 9...Flange.

Claims (1)

[Scope of Claims] 1. A through hole is formed in a wall body in which at least one side of a concrete wall is covered with a heat insulating material, and a steel liner is connected to the surface of the insulating material on the side opposite to the concrete wall and the circumferential surface of the through hole. In a sleeve structure consisting of a plate and a sleeve, the sleeve consists of a main sleeve corresponding to the thickness of the concrete wall, and a sub-sleeve corresponding to the thickness of the insulation material and steel liner, and these main and sub-sleeves are welded to each other via a flange, and the auxiliary sleeve is welded to a steel liner plate. 2. The sleeve structure according to claim 1, wherein the diameter of the secondary sleeve is larger than the diameter of the main sleeve.