JPH10131151A - Joint structure for preventing outflow of back-filling material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strengthen a joint filler by a method wherein stress materials are arranged among supporting materials installed at regular intervals in order to connect the longitudinal direction of the mutual supporting materials, the supporting materials and the stress materials are buried into an elastic body and unified with the joint filler, and mounted on the back of a joint. SOLUTION: The rear of a joint 8 is stuffed with the back-filling material 10 such as soil and sand, and a joint filler 1 is penetrated so as to be curved into the joint 8 and correspond to earth pressure by the back-filling material 10 and wave pressure by backwash. When caissons 6 are moved by the uneven settlement, etc., of the caissons 6 after the installation of the caissons 6, a stress material 4 resists left-right and upper-lower and before-behind movement. Consequently, the fixing section of the joint filler 1 resists the movement by supporting materials 3, and can resist them up to the strength limit of the stress material 4. When the stress material 4 is buried under a loosened state, the stress material 4 can follow up to the shifting of the caissons 6 up to a stretched state. Accordingly, since the joint filler 1 is fixed onto the caissons 6 through the supporting materials 3, the fixing section can resist stress firmly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure provided in a seawall or the like constructed by connecting caissons continuously in order to prevent a backing material or a reclamation material on a back surface of a joint portion of the continuous caissons from flowing out. .

[0002]

2. Description of the Related Art When performing reclamation or revetment of a coast, there is a construction in which a caisson is continuously laid in the sea, and the sea area surrounded by the caisson is filled with a backing material such as earth and sand or a backing stone. In such construction, joints, which are seams between adjacent caissons, are covered from the back side to prevent the backing material from flowing out.

[0003] As a prior art of such joint structure, in the case of a structure constructed by continuously sunk caisson in the sea,
Joints are formed in the continuous part, but when this structure constructs a seawall and constructs a landfill, it is necessary to prevent the landfill sand from flowing out from this joint, and as a technology for that purpose, There is a technique such as Japanese Patent No. 45-22903. According to this, as shown in FIG. 6, a joint plate closing the joint is attached to the back of the joint to close the joint.

[0004] This joint plate is generally made of rubber or synthetic resin, and its structure and mounting condition are such that both sides of the joint plate are attached to the rear end of a continuous caisson so that it can cope with a slight inclination of the caisson. The joint has an extra length in the joint.

[0005]

However, the location of caisson installations in recent years is required offshore, which results in severe wave conditions, and caisson of very high height, such as 20 m or more, has become mainstream. ing. In such caissons, joints are subjected to very large earth pressure, water pressure and wave pressure, and in order to install such deep caissons on the seabed where the ground is not stable,
The inclination of the caisson becomes large, and the adjacent caissons incline in different directions, and the joints are greatly opened or shifted.

In such a situation, according to the above-mentioned prior art, the joint material attached to the joint does not have strength enough to cope with shocking wave pressure, water pressure, and earth pressure acting on the joint, and has a long time. In some cases, the joint material itself and its mounting part may be damaged. In addition, there is a problem that the joint material cannot follow the uneven settlement of the caisson and is destroyed, and as a result, the backing material flows out due to the wave pressure acting on the joint. It is a decisive problem.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a joint structure for preventing backing material outflow, in which a joint material for closing a joint is attached to the back of a joint formed by adjacent caissons of a continuous caisson. A stress material is arranged at a predetermined interval between the support materials provided in the joint so as to connect the longitudinal directions of the support materials, and the support material and the stress material are buried in an elastic body to form a joint material which is integrally formed. It is characterized by being attached to the back of the.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a state where the joint material is attached, and FIG. 2 is a partially cutaway front view showing a state where the joint material is attached. In the drawing, reference numeral 1 denotes a joint material, such as rubber, synthetic rubber or synthetic resin. A support member 3 such as a band-shaped iron plate is embedded in both sides of the band-shaped elastic member 2, and a flexible stress member 4 is arranged and connected between the two support members 3 at a predetermined interval. It is buried inside and integrated.

The stress material 4 is a material having excellent tensile strength, such as a chain or a wire rope as shown in FIG.
As shown in FIG. 3, the chain has a relaxed structure in which the elastic body 2 is interposed between the rings constituting the chain. In addition, the stress member 4 is set to have a width wider than the joint interval so that the stress member 4 can be installed with a surplus. In addition,
This surplus portion may be attached in a state of slackness in a curve or the like when simply forming and attaching a wide width,
Also, as shown in FIG. 1, it is preferable to form an extra shape in advance.

As shown in FIG. 4, one or both sides of one or both sides of the elastic body sandwiching the support member 3 and the stress material 4 embedded in the elastic body are replaced with a reinforcing material 5 such as a natural fiber or a synthetic fiber. Can be improved by forming a laminated body in which a plurality of layers are laminated via an elastic body. The joint material 1 thus formed is attached to the joint-side end of the adjacent caisson 6 with the fixing member 7 such as a bolt and a nut via the support member 3 on the side of the joint material 1 to close the joint 8. At this time, the joint material 1 is not attached to the joint in a tensioned state, but is attached with a surplus because it is formed to have a width wider than the joint width. 9 is a washer provided as needed.

According to the above configuration, after the backing material 10 such as earth and sand or a backing stone is packed in the back, the joint material 1 is not affected by the earth pressure by the backing material 10 or the wave pressure caused by the surf. As shown in FIG. 5, it is possible to cope with the joint by bending into the joint. If the caisson moves due to unequal subsidence of the caisson after the caisson installation,
The vertical and vertical movements are opposed by the stress member 4, and the fixing portion of the joint member 1 is opposed by the support member 3, so that the strength limit of the stress member 4 can be opposed.

When the stress member 4 is buried in a relaxed state, it becomes possible to follow the movement of the caisson until the stress state is reached.

[0013]

According to the present invention described in detail above, stress members are arranged at predetermined intervals between strip-shaped support members provided at predetermined intervals so as to connect the longitudinal directions of the support members. And by embedding the stress material in the elastic body and forming it integrally, the fixing part can strongly resist the stress in order to fix the joint material to the caisson via the support material, and Since the support members are connected at predetermined intervals by the stress members, the joint members are very strong, and the joint members have the effect of resisting the movement of the caisson to the strength limit of the stress members.

Further, when the stress member has a relaxed structure, there is an effect that the caisson can follow the movement of the caisson until the stressed state is reached.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a joint material according to an embodiment is attached.

FIG. 2 is a partially cutaway front view showing an attached state of a joint material.

FIG. 3 is an enlarged explanatory view when a stress material has a relaxed structure.

FIG. 4 is an explanatory view of a state in which reinforcing materials are laminated.

FIG. 5 is an explanatory view of a joint material after a backing material has been inserted.

FIG. 6 is an explanatory view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint material 2 Elastic body 3 Support body 4 Stress material 5 Reinforcement material 6 Caisson 7 Fixture 8 Joint 10 Backing material

Claims (6)

[Claims] In a joint structure for preventing backing material from leaking, wherein a joint material for closing a joint is attached to a back surface of a joint formed by adjacent caissons of a continuous caisson, between strip-shaped support members provided at predetermined intervals. Stress materials are arranged at predetermined intervals so as to connect the longitudinal directions of the support materials,
A joint structure for preventing backing material from leaking out, characterized in that a joint material integrally embedded with a supporting material and a stress material embedded in an elastic body is attached to the back surface of the joint. 2. The joint structure according to claim 1, wherein the stress material is a chain. 3. The joint structure for preventing backing material from flowing out according to claim 1, wherein an elastic body is interposed between the rings constituting the chain. 4. A laminate according to claim 1, wherein one or both sides of the elastic body on both sides sandwiching the support material and the stress material are laminated with a plurality of layers of a reinforcing material such as a natural fiber or a synthetic fiber via the elastic body. A joint structure for preventing backing material from flowing out. 5. The joint structure according to claim 1, wherein the elastic body is made of rubber. 6. The joint structure according to claim 1, wherein the joint material has a width wider than the joint width, and is attached to a back surface of the joint with a surplus.