JPH08199664A - Concrete pipe seal structure - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a concrete pipe sealing structure that is easy to construct and has excellent sealing properties. [Constitution] Both joint ends 11, 1 of the concrete pipe 1
When the two are butted and joined to each other, in the concrete pipe sealing structure in which the sealing material 2 is interposed, the mounting leg 4 is projected to the lower portion of the sealing body 3 having a substantially butterfly cross section made of a solid material. The upper and lower lips 5, 6 are formed on the left and right sides of the seal body 3, and the sponge rubber layer 7 is formed on the top surface of the seal body 3, and the sealing material 2 is formed on the end surface of one joint end 11 of the concrete pipe 1. After the mounting leg 4 is embedded and mounted, both joint ends 11 and 12 are joined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing structure for concrete pipes.

[0002]

2. Description of the Related Art As shown in FIGS. 6 and 7, a box culvert, that is, a joint portion of a concrete pipe 1 is buried between two joint ends 11 and 12 as shown in FIG. The main body 9 made of butyl rubber is integrally bonded to the outer side of the hollow portion 8 made of sponge rubber, and is joined thereto.

[0003]

However, when the seal material 10 is attached to the joint end surface 11 of the concrete pipe 1 as shown in FIG. 6, first, the joint end surface 11 is cleaned to obtain the seal material 1.
Although 0 is stuck, there is a problem that this sticking work takes a lot of time and labor, and if the joint end surface is wet in rainy weather, the adhesiveness of the butyl rubber material of the above sealing material 10 decreases, There was a problem that the attachment work could not be done and the construction was impossible. In addition, due to the form of the sealing material, sufficient adhesion to the joint end surface of the concrete pipe cannot always be obtained, and there is a problem with the sealing property. Therefore, in view of the conventional problems, it is an object of the present invention to provide a concrete pipe sealing structure that is easy to construct and has excellent sealing properties.

[0004]

In order to achieve such an object, the structure of the present invention is, as shown in FIG. 1, a seal when abutting and joining both joint ends 11 and 12 of a concrete pipe 1. In a sealing structure for a concrete pipe in which a material 2 is interposed, a mounting leg 4 is projectingly provided at a lower portion of a seal body 3 having a substantially butterfly cross section made of a solid material, and the mounting legs 4 are provided on the left and right sides of the seal body 3. Upper and lower lips 5, 6 respectively
Further, a sponge rubber layer 7 is formed on the top surface, and the sealing material 2 is attached to the end surface of one joint end portion 11 of the concrete pipe 1 by embedding the mounting leg 4 and both joint end portions 11,
It is formed by joining 12 together.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 5, when both joint ends 11 and 12 of the concrete pipe 1 are butted and joined to each other, a sealing material 2 having a cross-sectional shape as shown in FIG. 1 is interposed. The sealing material 2 has mounting legs 4 projecting from the bottom of a sealing body 3 made of a solid material and having a substantially butterfly cross section, and upper and lower lips 5 and 6 are formed on the left and right sides of the sealing body 3, respectively. Also,
A sponge rubber layer 7 is provided on the wavy top surface of the seal body 3.
Are formed.

First, the sealing material 2 is attached to a concrete pipe manufacturing formwork, and then concrete is poured into the formwork, so that one joint end portion 11 of the concrete pipe 1 is attached to the concrete pipe making form. As shown in, the mounting leg 4 of the sealing material 2 is mounted in a buried state. Therefore, unlike the prior art, much work is not required for the work of attaching the sealing material 2.

Then, as shown in FIG.
When the other joint end portion 12 is abutted against and joined to 1, the sponge rubber layer 7 is closely contacted so as to absorb a small uneven surface of concrete, so that the sealing property is remarkably improved.
Further, when it is buried in the ground as shown in FIG. 4, the water passing through the pipe acts so as to press the lip 5 against the joint end portion 12 as shown by the arrow A, and the ground water outside the pipe also acts in the same manner. Further improve the sealing property.

Further, since the seal main body 3 has a hollow portion and a lip and is rich in flexibility, it is possible to sufficiently absorb the variation in the gap of the joint portion and improve the sealing property. As it is made of hard solid material, it has excellent durability. Further, since butyl rubber as used in the past is not used for the sealing material 2, the construction can be easily performed even if the concrete surface is wet in the rain.

[0009]

As described above, in the concrete pipe sealing structure of the present invention, the sealing material is such that the sealing material has a substantially butterfly cross section, and the mounting leg embedded in one joint end of the concrete pipe is projected. Therefore, compared with the conventional seal material, it is easier to perform installation work such as installation work, and the sealability is significantly improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a sealing material of a concrete pipe seal structure of the present invention.

FIG. 2 is a cross-sectional view of the concrete pipe seal structure of the above before joining.

FIG. 3 is a cross-sectional view of the concrete pipe seal structure of the same after joining.

FIG. 4 is a cross-sectional view showing a sealed state of the above.

FIG. 5 is a perspective view of a concrete pipe.

FIG. 6 (a) is a cross-sectional view of the same concrete pipe seal structure as above before joining. (B) It is sectional drawing in the state after joining of the seal structure of the concrete pipe same as the above.

[Explanation of symbols] 1 concrete pipe 11 connection end 12 connection end 2 sealing material 3 seal body 4 mounting leg 5 lip 6 lip 7 sponge rubber layer A arrow

Claims (1)

[Claims] 1. A seal structure for a concrete pipe, wherein a sealing material is interposed when joining both joint ends of a concrete pipe to each other by abutting and joining, and the seal material is a solid material having a substantially butterfly cross section. Mounting legs are provided on the lower part of the main body, upper and lower lips are formed on the left and right sides of the seal main body, and a sponge rubber layer is formed on the top surface. A sealing structure for a concrete pipe, characterized in that the mounting legs are embedded and mounted, and then both joint ends are joined.