JPH108537A - Flexible box culvert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a box culvert for which processing for joints between the main bodies of the box culvert can be executed surely. SOLUTION: A flexible box culvert is composed of a plurality of box culvert main bodies 1a, 1b and flexible connecting members 2 each attached to each of end faces of the box culvert main bodies 1a, 1b for connecting the box culvert main bodies 1a, 1b together and for absorbing displacement of the box culvert main bodies 1a, 1b with their deformation. An elastic cover body 5 is attached to the inside of a joint between the box culvert main bodies 1a and 1b along the inner periphery of the box culvert main bodies 1a and 1b. The elastic cover body 5 is also attached to the outside of the joint between the box culvert main bodies 1a and 1b along the outer periphery of the box culvert main bodies 1a and 1b. A plurality of protuberances 5a are provided in projection at the cover body 5 at its surface contacting with the box culvert main bodies 1a, 1b so that they can be buried in concrete of the box culvert main bodies 1a, 1b for preventing the cover body 5 from separating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible box culvert formed so as to be able to freely cope with displacement due to uneven settlement of the ground.

[0002]

2. Description of the Related Art Box culverts are continuously installed in the ground, and water flows through the culverts. In particular, when the box culvert is installed as a common ditch, it is necessary to block water from entering from outside. It is necessary that the joint portion be configured to be able to freely follow displacement due to uneven settlement of the ground so as not to cause water leakage.

In response to this type of request, the present applicant has developed a flexible box culvert, for example, as shown in FIG. 4 (JP-A-63-110327).

In the figures, reference numerals 1a and 1b denote box culvert bodies formed of reinforced concrete into a tube having a rectangular cross section and installed adjacent to each other in the axial direction, and 2 denotes a box culvert formed of synthetic rubber or the like. Box culvert main body 1a between the end faces of main bodies 1a and 1b and
It is continuous along the circumference of 1b, and embedded and attached to both end faces, and connects the box culvert bodies 1a and 1b, and deforms at the time of uneven settlement of the ground, etc. The flexible connecting member 3 for absorbing the displacement of 1b is continuously filled around the box culvert bodies 1a and 1b from the inside between the end faces of the box culvert bodies 1a and 1b, and the adjacent box culverts An elastic sealing material made of silicon or urethane for closing the joint between the main bodies 1a and 1b, and reference numeral 4 is formed in a rectangular ring shape, and between the ends of the box culvert main bodies 1a and 1b. It is a steel collar which is mounted on both sides and suppresses displacement exceeding the allowable amount of the box culvert bodies 1a and 1b.

[0005]

The conventional flexible box culvert is constructed as described above. In particular, the joint treatment of the box culvert main bodies 1a and 1b is performed by simply filling the elastic sealing material 3 from the inside. The elastic sealing material 3 deteriorates with the passage of time and may not be able to accurately follow the displacement of the box culvert bodies 1a and 1b due to uneven settlement, and the surface of the elastic sealing material 3 There have been problems such as the formation of irregularities and the tendency of deposits to be deposited on joints.

Further, since the elastic sealing material 3 is installed in the extremely narrow space inside the box culvert bodies 1a and 1b after the box culvert bodies 1a and 1b are installed on site, not only is the work complicated, but also the There is also a problem that unevenness such as unevenness occurs and quality degradation is inevitable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a flexible box culvert in which joints of the box culvert can be reliably processed.

[0008]

A flexible box culvert according to the present invention is provided between a plurality of box culvert bodies installed adjacent to each other in the axial direction and an end face of the box culvert body. A flexible box culvert having a flexible connecting member that connects the box culvert bodies together and deforms and absorbs the displacement of the box culvert body, an inner portion of a joint portion of the box culvert body. The cover body having elasticity is attached along the inner periphery of the box culvert main body.

A cover body having elasticity is attached to both the inner side and the outer side of the joint of the box culvert main body along the outer periphery of the box culvert main body. Further, a plurality of projections are embedded in the concrete of the box culvert main body to protrude from the contact surface of the cover body with the box culvert main body to prevent the cover body from peeling off.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 (a), (b), (c) and FIG.
1 shows an embodiment of the present invention, and in the figures, the same parts as those in the conventional example are denoted by the same reference numerals and description thereof will be omitted.

Reference numeral 5 denotes a box culvert main body 1a and 1b which are continuously attached to the inner periphery of the joint of the adjacent box culverts so as to straddle both ends thereof. This is a cover body for preventing

The cover body 5 is formed in a thin strip shape from an elastic material such as natural rubber or synthetic rubber which is hard to deteriorate and is rich in elasticity, and is attached to the inner periphery of the joint of the box culvert bodies 1a and 1b. I have. In this case, the cover body 5 is provided with the box culvert main body 1a and the box culvert main body 1a so that the water flowing through the joint between the box culvert main bodies 1a and 1b does not receive resistance.
It is attached to be flush with the inner surface of 1b.

A box culvert main body is provided on a contact surface of the cover body 5 with the box culvert main bodies 1a and 1b.
Cover body 5 embedded in concrete of 1a and 1b
A plurality of projections 5a are provided so as not to come off.

The protrusion 5a may be simply provided in a columnar shape, or may be provided in a rib shape continuous in the circumferential direction of the box culvert bodies 1a and 1b. Although the cover body 5 is attached in advance when the box culvert bodies 1a and 1b are manufactured in principle, the box culverts 1a and 1b may be installed on site and then attached with an adhesive.

In such a configuration, when the box culvert bodies 1a and 1b are displaced due to uneven settlement, etc.,
The cover body 5 can freely expand and contract together with the flexible connecting member, and in this case, since the plurality of projections 5a are embedded in the concrete of the box culvert bodies 1a and 1b, the cover body 5 may come off. Nothing,
Further, the cover body 5 also has a function of preventing water leakage at the joint.

FIG. 1 (b) shows a flexible box culvert in which the steel collar 4 is omitted in order to simplify the molding and reduce the cost.

FIGS. 3 (a) and 3 (b) show the joint 5 by attaching the cover body 5 to both the inside and the outside of the joint of the box culvert main body along the outer periphery of the box culvert main body. It has improved prevention of water leakage.

Further, as the elastic sealing material 3 filled in the joint deteriorates with the passage of time, a gap is formed in the joint, and if an overflow or the like is trapped in the gap, the displacement follows irregular displacement or the like. Although the performance is reduced, since the cover body 5 is attached to the outside of the joint,
Since it is possible to prevent the spillover or the like from being caught in the joint, the ability to follow a displacement due to uneven settlement or the like can be maintained semipermanently.

[0019]

The flexible box culvert according to the present invention has the above-described structure, and has a cover having elasticity inside the joint portion of the box culvert main body along the inner periphery of the box culvert main body. Since it is attached, it has the effect of freely following the displacement of the box culvert main body due to uneven settlement and the like together with the flexible connecting member, thereby reliably preventing water leakage at the joint.

Also, since the surface of the joint can be smoothed,
There is also an effect that deposits can be reliably prevented from being deposited on joints. Further, since the cover body is attached to both the inner side and the outer side of the joint part of the box culvert main body along the outer periphery of the box culvert main body, it is possible to more reliably prevent water leakage at the joint part. .

Further, since a plurality of projections which are buried in the concrete of the box culvert body and prevent the cover body from being peeled off are provided on the contact surface of the cover body with the box culvert body, the cover body is peeled off. There is no need to worry about leaks.

[Brief description of the drawings]

1A is a longitudinal sectional view of a joint portion of a flexible box culvert, and FIGS. 1B and 1C are enlarged views of a portion in FIG.

FIG. 2 is a cross-sectional view of a joint portion of a flexible box culvert.

3 (a) is a longitudinal sectional view of a joint portion of a flexible box culvert, and FIG. 3 (b) is an enlarged view of a portion in FIG. 3 (a).

FIG. 4 is a longitudinal sectional view of a joint portion of a conventional flexible box culvert.

[Explanation of symbols]

1a, 1b ... box culvert body, 2 ... flexible connecting member, 3 ... elastic sealing material, 4 ... steel collar, 5 ... cover body.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Saji 4-2-2 Shiba, Minato-ku, Tokyo Inside Geostar Co., Ltd. (72) Inventor Yusuke 4-2-2 Shiba, Minato-ku, Tokyo Geostar Co., Ltd. (72) Inventor Keiichi Watanabe 4- 2-3 Shiba, Minato-ku, Tokyo Geostar Co., Ltd.

Claims (3)

[Claims] 1. A plurality of box culvert bodies installed adjacent to each other in the axial direction, and the box culvert bodies are attached between end faces of the box culvert bodies. In a flexible box culvert having a flexible connecting member that absorbs displacement of the culvert main body, a cover body having elasticity inside an joint portion of the box culvert main body is provided on an inner periphery of the box culvert main body. A flexible box culvert characterized by being mounted along. 2. A flexible body according to claim 1, wherein a cover body having elasticity is attached to an outer portion of the joint portion of the box culvert main body along an outer periphery of the box culvert main body. Sex box culvert. 3. The box culvert main body is provided with a plurality of projections, which are buried in the concrete of the box culvert main body and prevent the cover body from peeling, on a contact surface of the cover body with the box culvert main body. 3. The flexible box culvert according to paragraph 1 or 2.