JP4401249B2 - Impermeable structure for joints - Google Patents

Description

  The present invention relates to a watertight structure for a joint of a structure built in a sea (water) area such as a caisson or an L-shaped block.

  In structures such as waste disposal sites and revetment structures that build shielding areas in the sea, etc., shields are made by continuously covering structures such as concrete, steel, hybrid caissons and L blocks made of steel or concrete. There is a construction method to build the area. In the case of such a construction method, the water shielding function may be lost due to displacement of joints between adjacent structures due to ground fluctuation, uneven settlement, landfill load, and the like.

Therefore, as a conventional example of the water-blocking structure corresponding to the displacement of the joint spacing, in the vicinity of both ends of the joint formed between adjacent caissons, two long cylinders fixed to one end wall of the caisson, and these lengths There is a structure constructed from an impermeable wall layer made of an asphalt mixture filled in joints between cylinders (see, for example, Patent Document 1).
JP 2002-167772 A

According to such conventional technology, many long tubes have to be installed in the joints, and since the installation work cannot be performed in the sea area of the caisson installation site, it is installed on land before the caisson installation. I will keep it. In this case, the caissons may collide with each other during the caisson installation work, and in this case, the long cylinder may be crushed and damaged.
In addition, when the caisson joint interval changes, there is a problem that the range in which the caisson joint distance can follow is determined by the diameter of the long cylinder.

In particular, the movement of the caisson due to unequal subsidence or the like is generally not only vertical but also tilted, so that the joint displacement is not parallel but displaced obliquely.
Then, since the long tube cannot be deformed and follow, there is a problem in that the contact with the facing caisson wall cannot be obtained over the entire length, and a gap is generated in the wider joint width generated either above or below. .

  The present invention has been made to solve the above-described problems, and an object thereof is to provide means capable of dealing with any joint width displacement.

Therefore, the present invention forms slopes at mutually opposite corners constituting joints of structures such as caisson and L-shaped blocks arranged continuously, and attaches embedded plates to the outer surface of the side wall at predetermined intervals along the joints. The side walls of the waterproof joint material having flexibility are fixed to the opposing embedded plates to form a slack, the slack is accommodated in the space formed by the joint and the slope, and the embedded plate Both sides of a flexible pressure-resistant joint material having a movement allowance so as to cover from the outside are fixed to the outer surface of the side wall of the structure.

  Further, the mounting plate is attached to the embedding plate, and both sides of the water-stop joint material are fixed to the opposing mounting plate in a state of having slack.

As a result, the joint between the caissons is water-blocked by the double structure of the pressure joint material and the waterproof joint material, so that water pressure, wave pressure, seismic force, earth pressure such as landfill material, etc. On the other hand, in order to respond | correspond with a pressure | voltage resistant joint material, the waterproofing joint material improves durability while improving the water-blocking effect between joints.
In addition, when the caisson moves due to unequal subsidence or the like and displacement occurs in the joint interval, the waterproof joint material can respond to the displacement by the slack, and the pressure joint material can correspond by the movement allowance, The effect that the water shielding performance can be maintained is obtained.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an enlarged sectional explanatory view showing an embodiment of the present invention, FIG. 2 is a main part explanatory view, and FIG. 3 is a side explanatory view.
In the figure, reference numeral 1 denotes a concrete caisson that is a structure, which is slightly from the corner of one or both outer surfaces of the adjacent caisson 2 of the adjacent caisson whose foundation is solidified by asphalt mixture or the like. An embedded plate 4 made of stainless steel or the like having anchor bars 3 at predetermined intervals is attached to the outer surface on the outer side over the entire length in the vertical direction, and the surface of the plate is exposed on the same surface as the concrete surface. In addition, although the structure of this description demonstrates by a caisson, it is not necessarily restricted to a caisson, A structure like an L-type block may be sufficient.

Reference numeral 5 denotes a mounting plate made of stainless steel or the like, which is integrally attached to the embedded plate 4 by welding, and is positioned so as not to protrude from the end face of the caisson 1 on the joint side.
6 is a water-stop joint material, which is attached to the mounting plates 5 of the caisson 1 on both sides forming the joint, and closes the joint. The attachment structure has a slack 7 so as to cope with the displacement of the joint. Then, it is securely attached to the mounting plate 5 by bonding or bolts and nuts. The material may be a material that is flexible and impermeable to water, and is a thin plate or sheet material such as rubber or synthetic resin material.

As shown in the figure, the opposite corners of the caisson 1 are cut off to form a slope 8 so that the slack 7 of the water-stopping joint material 6 can be stored well. There is no adverse effect such as contact with the waterproof joint material 6 to cause damage.
Reference numeral 9 denotes a pressure-resistant joint material, which is provided so as to cover all the mounting plate 5 and the water-stop joint material 6 from the embedded plate 4 of the caisson 1 on both sides forming the joint. As for the attachment state, both sides are respectively attached and fixed to the caisson 1 with anchor bolts 11 or the like, and a movement allowance 10 is formed so as to correspond to the movement of the caisson 1. The material may be a material that is flexible and impervious to water, and is a plate-like body such as rubber or synthetic resin material. If necessary, natural or synthetic fibers may be included in the plate-like body. A woven fabric or non-woven fabric obtained by laminating with rubber or synthetic resin may be used.

Further, although the movement allowance 10 is formed in a bellows shape in the drawing, it may have any shape, and may be a shape that is simply bent in a curved shape as shown in FIG.
According to the water-insulating structure of the joint having such a structure, the joint between the caisson is water-insulated by the double structure of the pressure-resistant joint material 9 and the water-stop joint material 5, such as water pressure, wave pressure, landfill material, etc. In order to cope with the earth pressure and the like by the pressure-resistant joint material 9, the water-stop joint material 6 increases the water shielding effect between the joints and improves the durability.

Therefore, when the caisson 1 moves due to unequal subsidence or the like and displacement occurs in the joint interval, the waterproof joint material 6 responds to the displacement by the slack 7 and the pressure joint material 9 responds by the movement allowance 10. The water shielding performance can be maintained.
Moreover, although not shown in figure, the filling material which consists of water-impermeable materials, such as an asphalt mixture, is normally filled between joints, and the waterproof joint material 6 receives the pressure of the filling material from an inner side.

  In the above configuration, the mounting plate 5 may be omitted, and the waterproof joint material 6 may be directly attached to the embedded plate 4.

Expanded explanatory drawing showing an example Main part explanatory drawing which shows an Example Side view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Caisson 2 Side wall 3 Anchor reinforcement 4 Embedding plate 5 Mounting plate 6 Water-stop joint material 7 Slack 8 Slope 9 Pressure joint material 10 Movement allowance 11 Anchor bolt

Claims (1)

Slopes are formed at opposite corners constituting the joints of structures such as caisson and L-shaped blocks that are continuously arranged, and embedded plates are attached to the outer surface of the side walls at predetermined intervals along the joints, and the opposing embedded parts Each side of the waterproof joint material having flexibility is fixed to the plate to form a slack, and the slack is stored in the space formed by the joint and the slope, and further, the embedded plate is covered from the outside. A waterproof structure for joints, wherein both sides of a flexible pressure-resistant joint material having a movement allowance are fixed to the outer surfaces of the side walls of the structure.

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