JPS5849257Y2 - Joint seal structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint sealing structure for sealing vertical joints or side joints of structures such as caissons.

When reclamation work is carried out on the coast, etc., large caissons are lined up and sunk on the seabed to form the basis of a seawall surrounding the sea surface to be reclaimed, and earth and sand is carried into the sea area surrounded by the rows of caissons to perform the reclamation. .

The caissons are arranged in a line at regular intervals from each other, so
There is a risk that the earth and sand used for reclamation will be washed away by seawater and flow out from this gap, so it is necessary to seal the gap in the caisson.

In addition, drainage tunnels or common ditches may be provided at the bottom of each caisson to penetrate through each caisson, and in this case, it is necessary to completely seal the vertical or horizontal joints between the caissons in the wall surrounding the tunnel. There is.

Conventionally, as a joint seal for such a caisson, as shown in FIG.
Alternatively, as shown in FIG. 2, a method is known in which a figure-8 rubber sealing material 4 is used, which is made by stacking cylinders so that the cross section becomes a figure-8 shape.

However, the cylindrical rubber sealing material 3 shown in Fig. 1 has both ends closed, the inside of the cylinder is evacuated, and the cylinder is inserted perpendicularly into the gap of the flattened caisson as shown in Fig. 3, and then the upper end of the cylinder is cut off. It is used by opening the cylinder and introducing atmospheric air to inflate it and filling the cylinder with filler such as earth and sand, mortar, etc.
Water pressure is higher than atmospheric pressure in areas deeper than m or more deep, and simply cutting the top end of the cylinder does not inflate the cylinder, and it cannot be filled with filler, making it useless as a sealing structure between caissons.

Furthermore, in the case of the figure-8 rubber sealing material 4 shown in Fig. 2, it was deformed obliquely as shown in Fig. 4 due to the pressure of the earth and sand inside, and there were cases where it was not possible to completely seal the joint. .

In view of the above-mentioned deficiencies in the conventional joint sealing structure, the present invention reliably seals vertical joints or side joints of structures such as caissons, and also ensures more complete sealing when back pressure from earth and sand is applied. This provides a joint seal structure that allows for

Next, the content of the present invention will be specifically explained with reference to the drawings.

FIG. 5 is a front view of a row of caissons 1 in which the joint seal structure of the present invention is used, and FIG. 6 is a plan view thereof, in which the joint seal structure 5 of the present invention is used for sealing in the vertical direction.

FIG. 7 is a vertical sectional view of a row of caissons 1 provided with drainage tunnels 6, and as shown in the side view of the caissons 1 in FIG. The joint seal structure 5 of the present invention is used.

The joint seal structure 5 of the present invention is shown in a front view in FIG. 9, and in a sectional view taken along the line A-A in FIG. 10.

A sealing rubber 9 consisting of a fixing part 7 and a sealing part 8 bent at an obtuse angle and extending diagonally from the fixing part 7, and having an F-shaped cross section as a whole, is overlaid with a patch plate 10 on the fixing part 7, and the anchor bolt is attached. 11 etc., the joint sealing structure 5 of the present invention is constructed by tightly fixing it to the wall surface 12 of the caisson.

The joint sealing structure of the present invention is long and continuous in the right direction in FIG. 9, and has a sealing rubber 9 between a patch plate 10 made of a metal such as stainless steel or a rectangular flat plate made of synthetic resin and a wall surface 12 such as a caisson. The sealing rubber 9 is fixed to the wall surface 12 of a caisson or the like by sandwiching the fixing part 7 and tightening it with anchor bolts 11 or the like at appropriate intervals, and is attached to the joint part 2 in the horizontal or vertical direction.

When the seal rubber 9 of the present invention is fixed to one wall surface 12 of adjacent caissons and the wall surfaces 12' of the adjacent caissons are brought close together, the tips of the diagonally extending seal portions 8 of the seal rubber 9 come adjacent to each other as shown in FIG. It comes into contact with the wall surface 12' of the caisson, and its tip is curved and comes into close contact.

In this case, the seal rubber 9 is attached to the side of the joint gap where the back pressure is high in the direction in which the seal portion 8 extends.

For example, in the case of a landfill, if the seal part 8 is installed inside the landfill in the direction facing, and the inside of the seal part 8 is filled with mortar 13 or earth and sand, the back pressure will cause the seal to rubberize as shown in Figure 12. 9 is bent to more firmly adhere to the wall surface 12' of the adjacent caisson.

The outer surface of the seal portion 8 of the seal rubber 9 and the caisson wall surface 1
The angle θ formed with the perpendicular line ■−■ of 2 is preferably 45° or more and 60° or less.

If this angle is less than 45°, the adjacent caisson 1
′, the tip of the seal portion 8 of the seal rubber 9 does not slide along the adjacent caisson wall surface 12′, and if the tip is pulled, the seal portion 8 may bend in the opposite direction, and there is a risk that the seal cannot be completed completely. be.

If this angle exceeds 60°, when the adjacent caisson 1 is brought close to each other as shown in FIG. 11, the adhesion force with the seal portion 8 will be weak and complete sealing will not be possible.

The seal portion 8 of the seal rubber 9 is attached to the base end 14 as shown in FIG.
Although the shape may be such that it does not extend straight from the tip to the distal end 15 and curves downward in FIG. It is sufficient if the angle formed with the perpendicular line ■-■ is 45° to 60°.

The seal rubber 9 used in the present invention is made of natural rubber or synthetic rubber, and the elasticity of the rubber is appropriately selected depending on the thickness of the seal rubber 9.

When the seal rubber 9 is thin, a rubber with strong elasticity and relatively hardness is used, and on the other hand, when the seal rubber 9 is thick, a comparative rubber is used.

The length of the seal portion 8 is appropriately selected depending on the width of the gap to be sealed, but is preferably 3 to 10 times the thickness of the seal portion 8.

When using the joint sealing structure of the present invention, the gap between the joint part 2 of the caisson 1, etc., between the backing plate 10 and the adjacent caisson wall surface 12' is preferably about three times or less than the thickness d of the sealing part of the seal rubber. Arrange the caisson etc. so that it is less than twice as large.

If the above gap exceeds three times the thickness d of the seal portion 8,
In FIG. 12, if strong back pressure due to dirt or the like acts on the seal part 8, there is a risk that the seal part 8 will bend and be pushed into the gap, causing it to turn over.

If the gap is less than twice the thickness d of the seal portion 8, there is no risk that the seal portion 8 will be pushed into the gap and reversed, no matter how large the back pressure is applied.

Figure 13 shows the case where the gap is minimal, in this case the 14th
When the mortar 13 and the like are filled and back pressure is applied as shown in the figure, the sealing portion 8 comes into close contact with the adjacent wall surface over a wide area, and the sealing is performed most completely.

According to the joint sealing structure of the present invention, it is possible to completely seal the joint with an extremely simple structure, and the sealing becomes even more complete due to the back pressure of earth and sand.

If the gap between the joints is within a certain range, the joint can be completely sealed regardless of how wide or narrow the gap is, and even if the walls that sandwich the joint are not parallel and the gap has a slope that widens to one side, This can be closely sealed completely.

The joint seal structure of the present invention can be used for both vertical joints and horizontal joints, and can be used to seal the joints of structures such as caissons underwater regardless of the water depth, as well as for the joint seal structure of structures on land. used for.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a conventional cylindrical joint sealing material, Fig. 2 is a cross-sectional view of the same joint sealing material at a depth of water, Fig. 3 is a cross-sectional view of another conventional joint sealing material, and Fig. 4 is a cross-sectional view of a conventional cylindrical joint sealing material. Fig. 5 is a front view of a row of caissons using the joint seal structure of the present invention, Fig. 6 is a plan view of the same, and Fig. 7 is a cross-sectional view of the deformed state in use. A front sectional view when the joint seal structure of the present invention is used in a caisson, Fig. 8 is a side view of the same, Fig. 9 is a front view of the joint seal structure of the present invention, and Fig. 10 is a sectional view taken along line A-A of the same side. , and FIGS. 11 to 14 are cross-sectional views of the joint seal structure of the present invention in use. Explanation of symbols 1, 1'...caisson, 2...
...Joint portion, 3...Cylindrical rubber sealing material, 4
...8-shaped rubber sealing material, 5...Mountain seal structure, 6...Drainage tunnel, 7...
・Fixing part, 8...Seal part, 9...Seal rubber, 10...Packing plate, 11...
Anchor pole), 12.12'... Caisson wall, 13... Mortar, 14... Base end, 15... Tip.

Claims (3)

[Scope of utility model registration request] (1) At joints between structures such as arranged caissons,
A sealing rubber, which is composed of a plate-shaped fixing part and a sealing part bent at an obtuse angle and extending obliquely from the fixing part, and has a corner-shaped cross section as a whole, is applied to one wall surface of the structure facing the joint gap. The sealing rubber was fixed to the wall surface by sandwiching it between the boards and tightening it at an appropriate number of places with anchor bolts, etc., and the wall surface of the adjacent structure was brought into close contact with the sealing portion of the sealing rubber to seal the joints. A joint seal structure characterized by: (2) The joint seal structure according to claim 1, wherein the angle between the outer surface of the seal portion and the perpendicular to the wall surface of the structure is 45° or more and 60° or less. (3) The joint sealing structure according to claim 1, wherein the gap between the corresponding plate and the wall surface of the adjacent structure is not more than three times the thickness of the sealing portion of the seal rubber.