JPS6088748A - Reinforcement of steel/concrete sandwich panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for reinforcing steel/concrete cantwich panels constituting the side walls of ice pressure walls such as water/sea artificial +"rJ+.

Figures 1 and 2 are external drawings of an artificial island 1 that is installed in an icy area and is used for oil drilling and chemical processing, and is made of concrete, steel, or a hybrid of concrete and steel. Various models are being considered, and it is expected that many will actually be put into operation in the future.

In such an artificial island 1, the side wall receiving water pressure is the first
This is the outer wall portion shown by 2 in Fig. 2 and Fig. 2, and if it is made of steel, it often has a structure as shown in Fig. 3.

Zunawaji, in Figure 3, 3 is the outer plate, 4 is the small shrine for shaped steel, etc.
5 is a rib fNA such as a large type steel or a welded type steel, and the water pressure received by the outer plate 3 on the water sea side shown by the arrow W is transmitted through small aggregates 4 to the inside of the artificial island 1 made of 5 ribs. It becomes.

However, artificial islands made of steel have the disadvantage of high cost and a tendency to be too light in total weight, so concrete may be used in some parts to increase stability in icy waters. It is being projected.

Next, FIG. 4 shows a conventional example in which the outer wall 2 of the side wall, which is an ice pressure-resistant wall, is made of a sandwich panel of steel and concrete 1. is a net, which forms a box-shaped mesh, and this space is filled with concrete 8.

However, if the state shown in FIG. 4 remains, the steel and concrete 8 may separate, and the concrete 8 itself is powerless against tensile loads, so the strength of the sandwich panel of steel and concrete 8 is extremely low.

Therefore, as shown in Fig. 6 and Fig. 7, a large number of Shihel 9 are arranged inside the steel plate outer wall 2 and inner wall 6 to improve the adhesion between the steel plate and the concrete 8, or as shown in Fig. 5, reinforcing steel 10, and it is necessary to apply a tensile load to the concrete 8.

However, the ice pressure resistance wall shown in Figure 4 is generally thicker than 300 mm.
1, so arranging the reinforcing bars 10 in FIG.
There is no way to connect the outer wall 2 and the inner wall 6, and as shown in the figure, the head of Shihel 9 ends up stopping at a halfway point, and when repeated loads are applied to the concrete 8, the concrete 8 starts from near the head of Shihel 9. Cracks may occur.

Furthermore, since the distance between the outer wall 2 and the inner wall 6 is approximately 300 meters, humans cannot enter, and as shown in FIG. The only way to do this is by combining the two.

Therefore, the present invention eliminates reinforcing bars and half-finished steel in the steel-concrete sandwich panel described above, and uses studs to connect both the outer wall and the inner wall. To provide a method for reinforcing a concrete sand panel, which improves the connection and allows the panel to behave as if it were an integrated structure, thereby allowing the load applied to the panel to be rationally distributed to the outer and inner walls. It is intended for this purpose.

Zunawaji, the reinforcing method for a steel/concrete sandwich panel of the present invention is that in a concrete panel in which the inner and outer walls are covered with steel plates, the ends of a large number of studs placed inside the outer wall are inserted into the inner wall. After passing through five holes provided at positions corresponding to each of the above-mentioned studs, the holes are plugged and the tips of each stud are fixed to the inner wall, and further, inside the space formed by the above-mentioned inner wall and outer wall. It is characterized by being filled with concrete.

Hereinafter, with reference to the drawings, steel and steel to which the reinforcement method of the present invention is applied
Examples of the concrete sandwich panel will be described. FIG. 9 is a side sectional view of Example 1 of the steel/concrete sandwich panel of the present invention, and FIG. 11 is an enlarged sectional view of the main part of FIG. 9.

First, the surface of the outer wall 2 in Fig. 9 is the surface that the ice comes into contact with, and is flat with no irregularities, and in its side cross section, the outer wall 2, the inner wall 6, and the inner partition jA7 form a box-shaped grid. , the above-mentioned outer wall 2, inner wall 6, and internal partition material 7 are used as preparations.

A large number of studs 11 are attached to the outer wall 2, and the studs 11 are steel bars.

As shown in FIG. 9, this stud 11 is made to be sufficiently longer than the distance between the outer wall 2 and the inner wall 6, and its tip passes through the hole 12 made in the inner wall 6, passes through M, and protrudes. It is something that

The gap between the blank hole 12 and the stud II is closed by a closing plate 13, and the stud F' l 1 and the inner wall 6 are firmly connected.

The space formed by the outer wall 2 and inner wall 6 is filled with concrete 8 using a separately provided pipe or the like after the work on the closing plate 13 is completed.

In addition to the method of attaching the closing plate 13 by welding to close the gap between the stud 11 and the stud hole 12, as shown in Embodiment 2 of FIG. There is also a method of forming a bolt with a threaded tip and fixing it with a nut 15 via a washer 14 as a cover plate 13.

It is of course possible to use a deformed steel bar for the stud 11 shown in FIG. 9, and in this case there is an advantage that the texture between the steel and the concrete 8 is even better.

Zunawaji, the method of reinforcing the steel/concrete Santowich panel of the present invention is to install an appropriate number of studs on the outer wall.
The length of this stud should be long enough to cover the width between the outer wall and the inner wall, and a hole should be made in the inner wall so that the tip of the stud protruding from the outer wall should protrude from the hole. Then, the hole in the inner wall and the tip of the stud protruding from the inner wall were covered with a cover plate, the stud was fixed to the inner wall, and the concrete was fixed with a pipe, etc., which was installed separately after the above work was completed. It is characterized by filling the space.

As a result, each application of the present invention has the advantage of eliminating the extremely labor-intensive work of arranging reinforcing bars, which was conventionally required.

In addition, with the conventional dowel system in which the end point is placed in the middle of the concrete member, there is a risk that the concrete 1-91 may warp or wt4 when repeatedly loaded by water pressure. The use of studs to connect the outer and inner walls reduces the possibility of cracking, and the large number of studs that connect the outer and inner walls improves the adhesion between the concrete and the copper layer, making the outer wall, inner wall, and inner concrete appear as if they were one piece. It behaves as such, making it a strong sword.

A further advantage is that as a result, the number of studs can be reduced compared to the number of conventional dowels with intermediate terminations.

[Brief explanation of the drawing]

Figures 1 and 2 are external views of an artificial island for water and sea, and Figures 3 and 4 are side cross-sections of conventional steel and steel/concrete ice pressure walls, respectively, without showing their structure. Figure, f4S5 figure and 6th
The figure is a side cross-sectional view of another conventional concrete sandwich panel, Figure 7 is a plane cross-sectional view taken along the A-A direction in Figure 6, and Figure 8 is a conventional example in which dowels are attached to the outer and inner walls. Side sectional view of sandwich panel in example, No. 9
The figure is a side cross-sectional view of Example 1 of the steel/concrete sandwich panel of the present invention, and Figure 10 is B-B in Figure 9.
FIG. 11 is an enlarged sectional view of the main part of FIG. 9, and FIG. 12 is an enlarged side sectional view of the main part of the barbed concrete sandwich panel in Example 2 of the present invention. 2...Outer wall, 6...Inner wall, 8...Concrete-1-
211... Stat, 12... Idiot hole, 13...
Block board, 15...Natsuto. Agent: Patent Attorney Shin Ogawa - Patent Attorney Noro M - Patent Attorney Kazuhiko Saishita

Claims (1)

[Claims] In a concrete panel in which the inner and outer walls are covered with steel plates, the tips of a number of studs attached to the inside of the outer wall are penetrated through the holes provided in the inner wall at positions corresponding to the studs mentioned above, and then A method for reinforcing a steel/concrete witch panel, comprising: closing the holes, fixing the tips of each stud to the inner wall, and filling the space formed by the inner wall and the outer wall with concrete.