JPS5820845A - Connection of concrete pipe - 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 In order to simplify the installation work, the present invention relates to a joining method in which a concrete pipe main body is divided into a plurality of pieces in the longitudinal direction and the divided pieces are assembled on site.

Socket type joints, flange type joints, sleeve type joints, etc. for joining concrete pipes in the longitudinal direction are well known. However, there is no joint method in which the cross-section of a pipe or box is divided into two or more parts in the longitudinal direction and then assembled into a pipe or box shape on site.

Recently, in order to simplify the transportation and installation of large and ultra-large concrete pipes, the cross section of the pipe or Bonox has been divided into two parts.
It became necessary to divide it into four parts and make joints to form them on-site in the cross-sections of pipes and boxworks.

The present invention has been proposed to address the above circumstances. When forming a concrete pipe by joining the pieces of a concrete pipe that have been split into multiple pieces in the longitudinal direction, a waterproof rubber layer is formed on at least one of the joining surfaces of each piece, and the same is applied after each piece is combined. A long recess provided on the outer circumferential side along the joint surface is closed with a long plate, and the same long plate is fixed with a bolt that is screwed into an embedded screw embedded in the divided piece, and then inserted into the long recess. A method for joining concrete pipes is provided, which is characterized by filling concrete for joining.

According to the method of the present invention, installation can be easily done on site by using embedded screws embedded in the 9-part pieces, bolts and long plates that are screwed into the screws, and the necessary cross-sectional shape can be configured and a strong joint can be obtained. , transportation and installation of large concrete pipes can be simplified.

Next, an embodiment of the method of the present invention will be explained based on the drawings.

FIGS. 1(a) and 1(b) are cross-sectional views of a simple molded joint according to the method of this embodiment, and FIG. 1(C) is a side view thereof. (a) Place the upper divided piece l of the cross section to be joined in the figure at a predetermined position on the lower divided piece 2, and (b) tighten the assembly bolt 4 as shown in the figure, and form a waterproof layer with the waterproof rubber plate 5. The joint 3 in the longitudinal direction of the concrete pipe is a conventional joint.

FIG. 2(a) is a sectional view showing an outline of the joining steel plate 6. FIG. This joining steel plate 6 is attached over the entire length of the joint as shown in FIG. 1(C), and a large number of joining reinforcing bars 7 are arranged vertically on one side of the joining steel plate 6. Note that the joining steel plate 6 is supported by the assembly bolt 4 and attached to the joining part with a nut 8. (b) is a sectional view showing a part of FIG. 1(a) in detail. In the figure, an embedded screw 9 that connects with the assembly bolt 4 is welded to a reinforcing bar 10 embedded in the divided piece. The upper divided piece 1 with the waterproof rubber plate 5 attached is indicated by the arrow 11
direction and joins with the upper and lower divided pieces 2.

FIG. 3 is a sectional view showing details of the bottom portion of FIG. 1(b).

The figure 1 shows the upper divided piece 1 placed on the lower divided piece 2 and joined with 9 assembly bolts 4. In this case, the waterproof rubber plate 5 is compressed by the weight of the upper divided piece 1 to form a waterproof rubber layer.

FIG. 4 is a cross-sectional view showing a case where the joining concrete 12 is press-fitted into the joint part assembled as shown in FIG. 3, and the joint part is partially integrated. Further, FIG. 5 shows details of the V portion of FIG. 1(c). The joining concrete 12 shown in FIG. 4 is press-fitted from the end of the concrete block in the direction of arrow 13 as shown.

When the concrete press-fitted in this way hardens,
It is possible to prevent the upper divided piece 1 from moving laterally and falling due to horizontal force caused by an earthquake or the like. With the waterproof rubber plate 5 sufficiently compressed by its own weight, highly waterproof joints can be easily obtained, and by increasing the number of joints, pipes, boxes, etc. with large cross sections can be easily constructed.

The embodiments have been described in detail above, but according to one method of the present invention, the following remarkable advantages can be obtained.

a' By embedding the embedded screw in the divided piece.

A joint for strong cross-section forming can be easily obtained on site.

'b Since the joint is partially integrated with concrete, it is safe even against horizontal forces caused by earthquakes.

By using C-formed joints, concrete pipes with a large cross section can be easily assembled on site.

d Since there are no reinforcing bars, joining hardware, or other protruding objects at the joint, there is no risk of damage to the joint during transportation or installation.

In addition to the above-mentioned advantages, the embodiment described above also has the advantage that the waterproof rubber plate can be compressed by the weight of the upper divided piece to form a highly waterproof waterproof rubber layer.

The present invention can be applied not only to concrete pipes for civil engineering and construction as in the above embodiments, but also to water pipes, water tanks, and other fields.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the method of the present invention, in which FIGS. 1(a) and 1(b) are cross-sectional side views showing concrete pipe segments, FIG. 1(C) is a side view thereof, and FIGS. Figure 2 (a
) is a cross-sectional view showing the joining steel plate 6, (b) is FIG. 1(a)
Figure 3 is an enlarged detailed view of the ■ part of Figure 1(b), Figure 4 is an enlarged detailed view of the ■ part of Figure 3.
Figure 5 is a cross-sectional side view showing the state after press-fitting.
It is an enlarged detailed view of the V part in figure (c). DESCRIPTION OF SYMBOLS 1... Upper divided piece, 2... Lower divided piece, 4... Assembly bolt, 5... Waterproof rubber plate, 6... Steel plate for joining. 8...Nut, 9...Embedded screw, 10...Embedded reinforcing bar.

Claims (1)

[Claims] When forming a concrete pipe by joining the divided pieces of a concrete pipe into multiple pieces in the longitudinal direction,
A waterproof rubber layer is formed on at least one of the joint surfaces of each divided piece, and after the divided pieces are combined, a long recess provided on the outer periphery side along the joint surface is closed with a long plate, and the same long plate A method for joining concrete pipes, characterized in that the pipes are fixed with bolts that are screwed into embedded screws embedded in the divided pieces, and then the elongated recesses are filled with joining concrete.