JPH063007B2 - Joint seal members for revetment structures - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal member for filling a joint portion of a seawall structure such as a caisson and an L-shaped block made of concrete.

2. Description of the Related Art In seawall structures such as concrete caissons and L-shaped blocks installed on coasts and riverbanks, gaps between opposite side surfaces of adjacent seawall structures, that is, water flow from joints, waves, etc. As a means for preventing the outflow of soil and sand, for example, as shown in FIG. 7, a vertically elongated soft synthetic resin or rubber is provided between the adjacent adjacent side edges 3a, 4a of the revetment structures 1a, 2a adjacent to each other. There is known a joint seal member 7a in which the plate member 5a formed by the above is fixedly erected while being loosened with a tack 6a or the like.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, such a conventional joint seal member 7a is torn or studded when adjacent revetment structures 1a and 2a have a significant vertical difference due to unequal subsidence and are pulled beyond slack. There is a problem that it breaks at the portion 6a, and since the plate material 5a projects from the surface of the revetment structures 1a and 2a, it breaks easily when a floating object collides, and thereafter loses its function as a seal member. there were.

In addition, when attaching to the seawall structure 1a, 2a, the plate material 5a
Had to be fixed in close contact with a tack 6a and the like, and the work was carried out in water, resulting in extremely poor workability.

The present invention has been made in view of the above circumstances, and does not lose the sealing property even if the revetment structure undergoes significant uneven settlement, and the joint seal member for the revetment structure is extremely easy to install. The purpose is to provide.

Means for Solving Problems A joint sealing member for a seawall structure according to the present invention is a frame body inserted into a joint portion of a seawall structure, in which a seal body formed of a water-absorbing polymer is incorporated. The sealing body is covered with a waterproof film, and when the sealing body absorbs water and expands, the sealing body becomes larger than at least the volume of the frame body so that the sealing body adheres to the opposite side surfaces of the seawall structure forming the joint portion. It is characterized in that it is configured.

Action Insert into the joint of the revetment structure, absorb the water by the seal body from which the waterproof film is peeled off, and stick out to the outer side of the frame body for expansion and close contact with the opposite side faces of the revetment structure.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

1 and 2 show an embodiment of the present invention.
The joint seal member 1 is composed of a frame body 2, a seal body 3 provided inside the frame body 2, and a waterproof film 4 covering the seal body 3.

The frame body 2 is made of a hard material such as polyvinyl chloride or iron having a thickness of about 3 to 10 mm, and the whole frame body is thin and vertically long by the upper and lower frame parts 5, 6, 7, and 8. It has a rectangular shape, and the open parts 9 and 10 are formed on both sides.
A plurality of crosspieces 11 are laterally bridged at equal intervals between the front and rear frame pieces 7 and 8.

The crosspiece 11 may be formed of a rope or the like, and may be arranged vertically or diagonally.

Further, the seal body 3 installed in the frame body 2 absorbs water when it comes into contact with water, crosslinks the constituent molecules, and at the same time expands by encapsulating the absorbed water, thereby increasing its volume and applying pressure from the outside. Even if the frame body 2 is molded into a thin rectangular parallelepiped, a synthetic polymer-based water-absorbing polymer that does not separate water, that is, retains an expanded state is used. In addition, the size thereof is larger than at least the volume of the frame body 2 when it absorbs water and expands, and the size thereof is larger than the open portions 9 and 10 formed on both side surfaces of the frame body 2. Need to be present.

Further, the waterproof film 4 covering the seal body 3 is formed of a material such as polyethylene, which is a waterproof synthetic resin film, or waterproof paper, which can be easily torn.

The seal member 1 thus configured is stored and transported as it is.

Then, when installing the seawall structure at the joint, the waterproof film 4 is peeled off by using the open portions 9 and 10 of the frame 2 at the installation location to expose the seal body 3, and FIGS. Adjacent revetment structures 12, 13 as shown in
It may be inserted into the joint member 14 formed by the opposing side surfaces of the.

The exposed seal body 3 of the seal member 1 inserted into the joint portion 14 absorbs water and expands.

If there is not enough water to expand the seal body 3 in the joint portion 14, a necessary amount of water is externally supplied to the joint portion 14.
Just pour water into it.

Although the expanded seal body 3 becomes larger than the volume of the frame body 2, the frame pieces 5, 6, 7, 8 (see FIG. 1) prevent expansion in the vertical direction and the front-back direction. As shown, it protrudes from the open parts 9 and 10 formed on both sides and the joint part 14
Side faces 15 and 16 of the revetment structure 12 and 13 that form the
The joint portion 14 is completely sealed by being pressed and closely contacted with each other.

Therefore, the joint portion 14 is completely sealed by the sealing body 3 which maintains the expanded state being in close contact with the side surfaces 15 and 16 in the elastic state, and prevents the outflow of the earth and sand due to the water flow or the waves. Further, even if the revetment structures 12 and 13 are significantly unequally settled to cause a vertical difference, the sheet body 3 is in surface contact with the side surfaces 15 and 16, and is kept in a sealed state without being damaged.

Further, in order to install the seal member 1, it suffices to remove the waterproof film 4 to expose the seal body 3 and insert the frame body 2 into the joint portion 14, and further, the work in water as in the conventional case is not required. It is extremely easy to work on the top of the revetment structure. Since the sealing body 3 is covered with the waterproof film 4 before installation, it is convenient for storage and transportation without absorbing rainwater or the like and expanding. Particularly, in this embodiment, the sheet body 3 covered with the waterproof film 4 is the frame body 2.
The frame 2 serves as a protective material and can effectively prevent damage to the waterproof film 4 during transportation and storage.

Further, since the seal body 3 is installed in the frame body 2 and maintains a substantially constant posture, the joint portion 14 can be reliably sealed.

Furthermore, FIG. 6 shows another embodiment of the present invention. This embodiment has the same overall structure as the embodiment shown in FIG. 1, but the sealing body 3 is in an exposed state. Is different from the above in that the frame body 2 is installed inside and the frame body 2 is covered with the waterproof film 4. The waterproof film 4 is provided with a pair of vertically extending cords 19 and 20 at substantially the center of both side surfaces thereof. The cords 19 and 20 are provided at a predetermined interval on the waterproof film 4. Further, the fixing portions 22 are inserted in the string loops 21 and at the lower end and in the vicinity of each of the string loops 21.

The joint seal member 1 having such a structure is inserted into the joint portion as in the embodiment shown in FIG. 1, but in this embodiment, the joint member is inserted into the joint portion while the waterproof film 4 is attached, and then the joint portion is inserted. By pulling the upper ends of the cords 19, 20 projecting to the upper part of the portion, the waterproof film 4 is torn at the fixing portion 22 and pulled up together with the cords 19, 20 to expose the frame body 2 and the seal body 3. Similarly to the embodiment shown in FIG. 1, the seal body 3 absorbs water and expands to seal the joint.

Although the frame body 2 and the seal body 3 are formed in a rectangular shape in the above-described embodiment, they may have other shapes such as a rod shape as long as they seal the joint portion when the seal body 3 expands. Alternatively, a plurality of them may be arranged at appropriate intervals.

EFFECTS OF THE INVENTION The seal member for the seawall structure according to the present invention does not lose the sealing property even when the seawall structure is significantly unevenly sinked, and the installation work is extremely simple and reliable, and the productivity, the transportability, and the
It has many effects such as excellent storability.

[Brief description of drawings]

1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along the line AA of FIG. 1, and FIG.
FIG. 4 is a perspective view showing a use state, FIGS. 4 and 5 are sectional views taken along the line BB in FIG. 3 showing the use state, and FIG. 6 shows a part of another embodiment of the present invention. FIG. 7 is a cut-away perspective view, and FIG. 7 is an explanatory view showing a usage state of a conventional example. 1 ... Seal member, 2 ... Frame body, 3 ... Seal body, 4 ...
… Waterproof film.

Claims (1)

[Claims] 1. A seal body formed of a water-absorbing polymer is internally provided in a frame body inserted into a joint portion of a seawall structure, and the seal body is covered with a waterproof film, and the seal body is The joint seal of the seawall structure is configured so that, when it absorbs water and expands, it becomes larger than at least the volume of the frame body and comes into close contact with opposite side surfaces of the seawall structure forming the joint part. Element.