JPS62121236A - Joint seal construction - Google Patents

Abstract

PURPOSE:To increase the tolerance of the width of a joint section, by inserting a sealing rubber having a V- or U-type cross section, into a fitting groove set on a wall surface on the joint side of a structure, and by fitting the rubber to cross the joint section. CONSTITUTION:Fitting sections 9 are extended from the upper end of V- or U-type, of the telescopic section 8 of the cross section V- or U- type of elastic material, to both sides. The tips of the fitting sections 9 are provided with expanded sections 10, and the partial sections of the expanded sections 10 are organized with water-swelling rubbers 11 to form sealing rubbers 7. When the respective into the confronting grooves 4 of the structure of a caisson 1 or the like, then water content is absorbed by the water-swelling rubbers 11, and the rubbers 11 are expanded in close contact with the internal surfaces of en larged sections 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial field of application The present invention is applicable to the installation of structures such as caissons in the ocean, etc.
The present invention relates to a joint seal structure for sealing the joint portion.

(b) Conventional technology When carrying out reclamation work on the coast, etc., large caissons are placed side by side on the seabed to form the foundation of a sea wall surrounding the sea surface to be reclaimed, and earth and sand are carried into the area surrounded by the rows of caissons. and landfill. Since the caissons are arranged in a line at regular intervals, it is necessary to seal the joints between the caissons to prevent dirt from washing away from the gaps.

Conventionally, the inventor of the present application disclosed the joint seal structure of this caisson in Japanese Utility Model Publication No. 58-49257 and Japanese Utility Model Publication No. 60-206.
We have proposed and actually used a structure in which a F-shaped or connected eight-shaped seal rubber as described in Publication No. 63 is attached to one wall surface of the structure facing the joint gap, and the joint is sealed.

(C) Problems to be solved by the invention In the conventional joint seal structure described above, the permissible range of the spacing between the joints is narrow, caissons, etc. must be installed at approximately constant intervals, and the unevenness of the ground may occur after the caissons are installed. Due to subsidence, etc., the gap between the joints widens, and the tip of the seal rubber fixed to one wall cannot reach the other wall, causing the joint seal to lose its effectiveness. Furthermore, the conventional joint seals mentioned above need to be attached to the wall before installing the caissons, etc.
There was also a risk of damage to the caisson etc. during installation work.

Therefore, the present invention has a wide tolerance range for the spacing between structures such as caisson installations, and can sufficiently accommodate large joints, even when the width of the joint changes due to uneven subsidence of the ground after construction. It is an object of the present invention to provide a joint sealing structure that can follow this trend and that can be easily constructed after the construction is installed.

(d) Means for solving the problem As a result of intensive research by the inventor in order to achieve the above purpose, the seven characters or U
It was discovered that a joint seal with a wide tolerance for the width of the joint can be constructed by inserting a seal rubber having a letter-shaped cross section into a mounting groove provided on the wall of the joint side of a structure and installing it so as to straddle the joint. He has completed his invention.

In other words, the present invention provides a joint between structures such as caissons arranged in such a way that the sides of the structure facing each other with the joint between the joints (respectively, a narrow entrance part, and a narrow entrance part continuous to the back of the entrance part and wider than the entrance part) The grooves for attaching the seal rubber having the shape of a picture are provided in parallel to each other, facing each other across the joint part, and the expansion and contraction part with a V-shaped or U-shaped cross section and the 7-shaped or U-shaped expansion part.
It consists of a mounting part extending from the upper end of the letter to both sides, and the distal end of the mounting part has a cross-sectional shape with a widened enlarged part. The gist is a joint seal structure in which the enlarged part is fitted into the enlarged part in a groove for attaching a seal to seal the joint part.

Next, the contents of the present invention will be explained in detail with reference to the drawings.

FIG. 1fd is an enlarged cross-sectional view of an example of the joint seal structure of the present invention, and FIG. 2 is a cross-sectional view of a joint portion of a caisson provided with the joint seal structure of the present invention. (1) is a cosiclete caisson arranged with a narrow joint (2) in between, and the side surface (3) facing the joint (2) of the caisson (1) has a groove (4) for attaching the seal rubber. ), (4) on the opposite side (3
) and (3) in 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 joint sealing, which is made of natural rubber, synthetic rubber, or other synthetic resin elastic body, and has an elastic part (8) with a V-shaped or U-shaped cross section in the center; It has attachment parts (9) extending from the upper end of the shape or U shape to both sides. The base end portion of the attachment portion (9) connected to the telescopic portion (8) has a small thickness (d), and the distal end portion of the attachment portion (9) forms an enlarged portion 110) with increased width. Seal rubber mounting part (
9) is inserted into the groove (4) so as to fit into its enlarged part (10) or the enlarged part (6) of the groove (4). The thickness (d) of the base end of the attachment part (9) of the seal rubber (7) is the same as that of the groove (4).
) is formed slightly smaller than @(W) of the entrance part (5) of the groove, and the enlarged part (lO) of the seal rubber is made smaller in cross section than the enlarged part (6) of the groove.

When at least a portion of the enlarged portion 1,101 of the seal rubber (7) is made of a known water-swellable rubber (11) that shrinks when dry and swells when it absorbs water, as shown in FIG.
After the sealing rubber (7) is inserted into the groove (4), the water-swelling rubber absorbs water and expands, and tightly adheres to the inner surface of the enlarged part (6) of the groove (4), creating a completely watertight state.

Instead of forming part of the ampullae (lO) with water-swollen rubber,
An enlarged part (10) of sealing rubber may be inserted into the enlarged part (6) of the groove, and the gap between the inner surface of the enlarged part (6) and the enlarged part (lO) may be filled with asphalt or hexarutal. Further, as shown in Fig. 3, a hollow hole (12) is provided in the center of the enlarged portion (10) along the longitudinal direction, and after the seal rubber is installed, a metal pipe (13), metal rod, asphalt, etc. is inserted into the hollow hole. It is also possible to press fit and expand the enlarged part (101) so that it comes into close contact with the enlarged part (6) of the groove.

A method for forming grooves (4) on the side surfaces (3) of a caisson (1) is to form grooves (4) in the areas where grooves (4) are to be formed when manufacturing a caisson by pouring cosiclete into a formwork. ) The groove (4) can be formed by embedding a foamed polystyrene resin having the same shape as the groove (4) and removing it after the cosiclete has solidified. Also, as shown in Figure 4, it is made of metal plates such as zinc metal + steel plates, or synthetic resin.

It is also possible to manufacture a caisson in which a groove forming member α0 having the inner surface shape of the groove (4) is buried and cosiclete is cast.

FIG. 5 shows another embodiment of the present invention, in which the enlarged portion (6) of the groove (4) and the enlarged portion (!0) of the seal rubber (7) have a rectangular cross-sectional shape. The cross-sectional shape of the expanded portion 4'6) and the enlarged portion (lO) can be formed into any shape, such as circular or square as shown in FIG.

The dotted line (14) in FIG. 5 is a reinforcing cloth, and the sealing rubber can be reinforced by embedding one or more reinforcing cloths in the sealing rubber as required.

(e) Function The method for constructing the joint seal structure of the present invention is to form a groove for attaching the seal rubber on the side of the caisson in advance when manufacturing the caisson, and then install the seal rubber along the groove after installing the caisson at a predetermined position in the sea. Complete watertightness is possible just by inserting it. Attach the seal so that the inside of the 7-shaped or U-shaped cross section of the extensible part (8) of the seal faces toward the side where water pressure or earth and sand pressure is applied from the outside.Then, the seal rubber will be stretched by the pressure and the seal rubber will expand. Since the proximal end of the portion (10) is brought into close contact with the inner surface of the enlarged portion (6) of the groove (4), watertightness is naturally achieved. Furthermore, water-tightness can be made more complete by using water-swellable rubber in the enlarged part or by filling the gap between the enlarged parts with asphalt or the like.

In the joint sealing structure of the present invention, the sealing rubber is inserted after the caisson is installed, so the sealing of the vertical joints of the caisson etc. can be done by simply inserting the sealing rubber into the groove from above, and the construction is easy and easy, so it is preferably used. It can also be used to seal horizontal joints.

(r) Effects According to the joint seal structure of the present invention, the V-shaped or U-shaped cross-sectional expandable portion of the seal rubber can expand and contract significantly.
When installing a caisson, etc., the permissible range of the width of the gap between the joints is large, making installation work for the caisson, etc. easy.

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.

It can be easily constructed by inserting the seal rubber into the groove after installing the caisson, and there is no risk of damage to the seal rubber during the caisson installation work.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the joint seal structure of the present invention, Fig. 2 is a cross-sectional view of a caisson joint provided with the joint seal structure of the present invention, and Fig. 6 is a cross-sectional view of the joint seal structure of the present invention; FIG. 4 is a cross-sectional view of an embodiment of the groove of the joint seal structure of the present invention, and FIG. 5 is a cross-sectional view of another embodiment of the joint seal structure of the present invention. Explanation of symbols +1+...Caisson (2)...Joint part (
3)...Side surface (4)...Groove (5)
...Entrance part (6)...Enlarged part (7)...
・Seal rubber (8)...Extendable part (9)...
Mounting part (10)... Ampulla part (!l)...
・Water swelling rubber (12)・Hollow hole (13)・・
・Metal tube (I4)...Reinforcement cloth (15)・
・Groove forming member

Claims (6)

[Claims] (1) At joints between structures such as arranged caissons,
Grooves for attaching seal rubber each have a cross-sectional shape consisting of a narrow entrance part and an enlarged part that is wider than the entrance part and continuous to the back of the entrance part, on the side surfaces of the structure facing each other across the joint part. They are arranged parallel to each other with the joints sandwiched in between, and consist of a V-shaped or U-shaped expandable section and a mounting section extending from the upper end of the V or U shape to both sides, and the tip of the mounting section has a width The mounting portions of the seal rubber having a cross-sectional shape forming an enlarged enlarged portion are fitted into the seal rubber mounting grooves facing each other across the joint portion so that the enlarged portions fit into the enlarged portions. A joint seal structure characterized in that the joint part is sealed. (2) The joint seal structure according to claim 1, wherein at least a part of the enlarged portion of the seal rubber is made of water-swollen rubber. (3) The joint sealing structure according to claim 1, wherein asphalt or mortar is filled into the gap inside the enlarged portion into which the enlarged portion of the seal rubber is fitted. (4) The joint seal structure according to claim 1, wherein the groove for attaching the seal rubber is constructed by embedding a groove forming member made of metal or synthetic resin in the side surface of the structure. (5) The joint sealing structure according to claim 1, wherein a hollow hole is provided in the center of the enlarged portion of the seal rubber along its longitudinal direction, and a metal rod or asphalt is inserted into the hollow hole. (6) The joint seal structure according to claim 1, wherein the enlarged portion of the groove for attaching the seal rubber has a circular or square cross-sectional shape.