JPH0467526B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a joint sealing structure for sealing the joints of a structure such as a caisson when it is installed in the ocean or the like.

[Conventional technology]

When reclamation work is carried out on the coast, etc., large caissons are placed side by side on the seabed, surrounding the sea surface to be reclaimed, and serve as the foundation of the seawall. It is necessary to seal the joints between the caissons to prevent the soil inside from being washed away.

As for the joint seal structure of this caisson, the inventor of the present application proposed in Japanese Patent Application No. 60-263380 and Japanese Patent Application No. 61-14469 a groove for attaching seal rubber to the joint part of the caisson, etc. A joint seal structure is disclosed in which a seal rubber having a widened enlarged portion formed at the tip of the groove is fitted into the widened enlarged portion of the mounting groove.

[Problem that the invention seeks to solve]

In the joint sealing structure previously disclosed by the present inventor, the sealing rubber mounting part, which forms the bulk of the sealing rubber, is made of flexible rubber, and this part is used for mounting a long sealing rubber with a length of more than 10 meters. It is not easy to insert the rubber seal along the groove from the edge, making it difficult to install the seal rubber.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a joint sealing method that makes it easy to insert a seal rubber into a groove for attaching the seal rubber and that allows the seal rubber to be attached reliably.

[Means for solving problems]

As a result of repeated research to achieve the above object, the present invention has found that by attaching a guide plate made of a hard plate to the end of the seal rubber attachment part, the seal rubber can be easily inserted into the groove and the seal rubber can be firmly fixed. The inventors have discovered that it is possible to do this, and have completed the present invention.

That is, the gist of the present invention is that at the joint between structures such as arranged caissons, a narrow entrance part and a continuation to the back of the entrance part are provided on the sides of the structures facing each other across the joint, Grooves for attaching a seal member having a cross-sectional shape consisting of an enlarged part wider than the inlet part are provided parallel to each other across the joint part, and are formed in a U-shape, V-shape, or two or more ridges. a guide plate consisting of a hard plate attached along the end of the attachment part of the seal rubber so as to sandwich the seal rubber from both sides; The sealing member consisting of the above is fitted into the joint so that the mounting portions sandwiched between the guide plates fit into the enlarged portions of the sealing member mounting grooves facing each other across the joint portion. A joint sealing method is characterized in that the joint is sealed.

Next, the contents of the present invention will be explained in detail with reference to the drawings. FIG. 1 is a sectional view showing an example of the joint sealing method of the present invention, and FIG. 2 is a sectional view of a caisson joint sealed by the joint sealing method of the present invention. 1 is a concrete caisson arranged across a narrow joint 2, and the side 3 of the caisson 1 facing the joint 2 has grooves 4, 4 for mounting a seal member on the opposite side 3, 3 are provided parallel to each other. The groove 4 has a narrow entrance portion 5 and widens at the back to form an enlarged portion 6.

7 is a sealing rubber for sealing joints, which is made of natural rubber, synthetic rubber, or other synthetic resin elastic body, and has an elastic part 8 having a V-shaped or U-shaped cross section in the center.
It has a mounting portion 9 extending from the upper end of the V-shape or U-shape to both sides. Reference numeral 10 denotes a guide plate having an L-shaped cross section, in which the tip of the mounting portion 9 of the seal rubber 7 is sandwiched between two guide plates 10, 10, and the bolt 11 is
This is hereby concluded. This seal rubber 7 and guide plate 1
The sealing member 12 made of 0 is inserted into the groove 4 so that the mounting part 9 and the guide plate 10 fit into the enlarged part 6 of the groove 4.

The guide plate 10 is made of a hard material such as metal or synthetic resin, and in the case of metal, a material that is resistant to seawater, such as stainless steel, is preferably used.

After inserting the attachment part 9 and the guide plate 10 into the groove 4, the gap between the inner surface of the enlarged part 6 and the guide plate 10 is filled with asphalt, mortar, etc., so that the sealing member can be completely fixed.

FIG. 3 is a sectional view showing another embodiment of the joint sealing method of the present invention. The tip of the attachment portion 9 of the seal rubber 7 is formed into a T-shape in cross section. Sandwich both sides of the upper side of the T-shape with guide plates 10, and bolt 1
This is concluded pursuant to 1.

FIG. 4 shows another embodiment, in which the cross-sectional shape of the elastic part 8 of the seal rubber 7 is a waveform having a plurality of crests, and the tolerance to the fluctuation of the joint after installation of the caisson is increased.

A method for forming the grooves 4 on the side surface 3 of the caisson 1 is to use foamed polystyrene resin having the same shape as the grooves 4 in the area where the grooves 4 are to be formed when concrete is poured into a formwork to manufacture the caisson. The trench 4 can be formed by burying the concrete and removing it after the concrete hardens. Further, as shown in Fig. 3, a caisson can be manufactured by burying a groove forming member 12 made of a metal plate such as a galvanized steel plate or a synthetic resin and having the inner surface shape of the groove 4, and pouring concrete. .

What is indicated by a dotted line in FIG. 1 is a reinforcing cloth 13, and the sealing rubber can be reinforced by embedding one or more reinforcing cloths in the sealing rubber as required.

This reinforcing cloth is made of blind weave cloth, and when the threads are arranged in a direction parallel to the rows of crests of the waves in the elastic part 8, the deformation stress in the elastic part 8 is reduced, and the caisson Even if a misalignment occurs during installation, the seal rubber 7 can be easily deformed and inserted into the groove 4.

[Effect]

According to the joint sealing method of the present invention, watertightness can be achieved by simply inserting a sealing member along the groove on the side surface of the caisson after installing the caisson at a predetermined position in the sea. By filling the gap between the enlarged parts with mortar, etc.
Complete watertightness can be achieved. By attaching a guide plate to the seal rubber, the seal rubber can easily slide in the groove.

The joint sealing method of the present invention is extremely convenient for sealing vertical joints because the sealing member can be inserted from above into the vertical joints after the caisson is installed, but it can also be used for sealing not only vertical joints but also horizontal joints. I can do it.

〔Effect of the invention〕

According to the joint sealing method of the present invention, it is extremely easy to insert the sealing member into the groove, and the sealing rubber can be reliably fixed in the groove using the guide plate. Even if there is a considerable misalignment of the joints when installing a caisson or the like, the sealing member can be easily inserted with the help of the guide plate. Furthermore, even if the gap between the joints changes due to uneven ground subsidence over many years after the caisson is installed, the seal rubber can expand and contract following the change in the gap and maintain the sealed state.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of the joint sealing method of the present invention, FIG. 2 is a cross-sectional view of a caisson joint sealed by the joint sealing method of the present invention, and FIGS. 3 and 4 are joints of the present invention. FIG. 7 is a cross-sectional view showing another example of the sealing method. 1...Caisson, 2...Joint part, 3...Side surface,
4...Groove, 5...Entrance part, 6...Enlarged part, 7...
... Seal rubber, 8 ... Telescopic part, 9 ... Mounting part, 1
0... Guide plate, 11... Bolt, 12... Groove forming member, 13... Reinforcement cloth.

Claims (1)

[Scope of Claims] 1. In a method for sealing joints between structures such as caissons arranged in a row, a narrow entrance part and a continuous entrance at the back of the entrance part are provided on the sides of the structures facing each other across the joint part. , Grooves for attaching seal members having a cross-sectional shape consisting of an enlarged part wider than the inlet part are provided in parallel to each other across the joint part, and are U-shaped, V-shaped, or have two or more ridges. a seal rubber consisting of an elastic section having a corrugated cross-sectional shape and a mounting section extending from both ends of the elastic section on both sides; and a guide consisting of a hard plate attached along the end of the attachment section of the seal rubber so as to sandwich the seal rubber from both sides. and a plate, such that the mounting portions sandwiched between the guide plates fit into the enlarged portions of the seal member mounting grooves facing each other across the joint portion. A joint sealing method characterized by sealing joint parts. 2. The joint sealing method according to claim 1, wherein the guide plate has an L-shaped cross section, and the two guide plates are attached so that one side of the L-shape holds an end of the seal rubber. 3. The joint seal according to claim 1, wherein the end of the attachment portion of the seal rubber has a T-shaped cross section, and the upper side of the T-shape is sandwiched between three flat guide plates from both sides. Method. 4. The joint sealing method according to claim 1, wherein asphalt or mortar is filled into the gap inside the enlarged portion into which the attachment portion of the seal rubber sandwiched between the guide plates is fitted. 5. The joint sealing method according to claim 1, wherein the groove for attaching the seal member is constructed by embedding a groove forming member made of metal or synthetic resin in the side surface of the structure. 6. The joint sealing method according to claim 1, wherein a reinforcing cloth is embedded in the seal rubber.