JPH0739983Y2 - Box culvert connection structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a box culvert connection structure.

[0002]

2. Description of the Related Art A conventional box culvert connecting structure has a connecting box culvert 1 provided with a connecting box 2 and a sheath hole 3, as shown in FIG. Male screws 4a are engraved on both ends of the connecting rod 4 made of round steel or the like, and an anchor plate 5 having a grout hole 5a formed therein is fitted into the end of the connecting rod 4 in the connecting box 2, and a washer 6 is inserted. A fixing nut 7 screwed onto the male screw 4a is used to fix the end portion of the connecting rod 4 in the connecting box 2, and a grout material such as cement paste is provided in a gap between the sheath hole 3 and the connecting rod 4. 8 was injected to prevent rust and fix the connecting rod 4.

[0003]

However, in the conventional box culvert connecting structure described above, the grout material 8 needs to be injected into the sheath hole 3, so that the workability at the time of connection is poor. . In view of the above-mentioned conventional problems, the present invention aims to provide a box culvert connection structure that does not require injection of grout material into the sheath hole, can prevent rust, and has good workability during connection. And

[0004]

In order to achieve the above-mentioned object, the present invention is to pass a connecting rod through a sheath hole of a box culvert and insert the end of the connecting rod in a connecting box provided in the box culvert. in the coupling structure of the box culvert connecting by fixing said to form a coating member by unbonded material on the outer circumference of the connecting rod, the outer peripheral portion of said connecting rod in said sheath bore has covered by the covering member, the covering Said connecting rod not covered by a member
Cover the outer circumference of the end of the
Between the inner peripheral surface of the and the outer periphery of the connecting rod passed through the sheath hole
With only a gap left in the box,
It is characterized by being filled with rutar .

[0005]

In the box culvert connecting structure according to the present invention, the covering member is formed on the outer periphery of the connecting rod with the unbonded material, and the outer periphery of the portion of the connecting rod in the sheath hole is covered with the covering member. by covering the outer periphery of an end portion of the connecting rod is not covered by the covering member by weathering oil, because of the rust prevention effect in the covering member, the injection of grout into the sheath bore is not required, connecting All sticks
The body was rustproof and passed through the inner surface of the sheath hole and the sheath hole.
With the gap left between the outer periphery of the connecting rod and the connecting rod,
By filling the mortar only in the binding box,
Fix the installation of box culverts once installed
Positive, it will facilitate replacement of culverts .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings by taking as an example the case of applying to a box culvert having a quadrangular cross section. FIG. 1 is a front view showing a box culvert according to an embodiment of the present invention, and FIG. 2 is a perspective view thereof. The box culvert 1 for connection has a bottom surface 1a, a ceiling surface 1b, and both side surfaces 1 in a cavity having a rectangular cross section.
The inclined surfaces 1d inclined at approximately 45 degrees with respect to c and 1c are formed at the four corners over the entire length, and the connecting box 2 is fixed to a blind hole having a quadrangular cross section provided at substantially the center of each inclined surface 1d. From the inside of the connecting box 2, both end faces 1e,
Sheath hole 3 penetrating up to 1e parallel to the axis
(See FIG. 4) are provided at the four corners. Box for connection 2
Is made of cast iron, and is provided at a position inside the end surface 1e of the connecting box culvert 1 to prevent damage. As shown in FIG. 4, the sheath hole 3 has an inner diameter of the connecting rod 4
Connecting rod 4 that is made sufficiently larger than the outer diameter of
The dimensions are set so that a gap is left between the outer circumference of the and .

Further, the connecting box culvert 1 has an annular packing on the end face 1e, for example, a soft packing 10 in which the surface of sponge rubber is coated with vulcanized rubber is attached, and the soft packing 10 is attached to the end faces 1e at the four inner corners thereof.
A restricting member 11 made of an elastic material having a higher hardness is arranged and fixed. The limiting member 11 has a connecting rod insertion hole 11a, is thinner than the soft packing 10, and has an end face slightly retracted. When the end face 1e of the box culvert is joined together, the compression amount of the soft packing 10 is reduced. Acts to limit.

In the case of this embodiment, as shown in FIG. 3, two intermediate culverts 13 and 13 are arranged between the connecting box culverts 1 and 1. Each of these intermediate culverts 13 has an inclined surface and a sheath hole 3, but differs from the connecting box culvert 1 only in that the connecting box 2 is not provided, and the connecting rod 4 passes through the sheath hole 3. To be done.

The connecting rod 4 according to the first embodiment of the present invention comprises:
As shown in FIG. 4, a male screw 4a is engraved at the end, and a covering member 15 is formed on the outer periphery by an unbonded material made of asphalt-based polymer having a rust preventive action. The outer periphery of the inner portion is covered with the covering member 15, and the end portion is arranged in the connecting box 2. Then, each connecting rod 4 fits the center hole 5a of the anchor plate 5 on the outer periphery of the end in the connecting box 2, puts the washer 6, and fixes the end with the fixing nut 7 screwed to the male screw 4a. I am allowed. After this fixing, the mortar 17 is filled in the connecting box 2.

Next, a connecting method in the box culvert connecting structure according to the first embodiment will be described. As shown in FIG. 4, two connecting box culverts 1 and two intermediate culverts 1 are used between the connecting box culverts 1 and 1 by using the connecting rod 4 in which the covering member 15 is previously formed of the unbonded material.
3 and 13 are arranged side by side. The connecting rod 4 is inserted into each sheath hole 3, the end of the connecting rod 4 is placed in the connecting box 2, the anchor plate 5 is fitted to the end, the washer 6 is inserted, and the male screw 4 is inserted.
A fixing nut 7 is screwed onto a and the connecting rod 4 is tensioned to fix its end. The mortar 17 is filled in the connecting box 2. By repeating such an operation, a desired number of box culverts are connected.

FIG. 5 is a partial sectional view showing a connection structure of a box culvert according to a second embodiment of the present invention. In the case of the second embodiment, the connecting rod 4 is provided between the end surface of the covering member 15 and the outer surface of the connecting box 2 and the covering member 1 is provided.
The outer periphery of the portion not covered by 5 is weatherproof oil 20
The present embodiment is different from the first embodiment in that the covering member 15 is covered with the unbonded material and the weathering oil 20 is applied to the outer periphery of the male screw 4a in advance. This is because when the tension is applied to the connecting rod 4, the position of the end surface of the covering member 15 and the position of the outer surface of the connecting box 2 do not always match exactly, and the male screw 4a of the connecting rod 4 does not necessarily match. This is because the length of the portion (1) is usually set to be long with a margin, and the portion of the connecting rod 4 not covered by the covering member 15 may remain in the sheath hole 3.
Since the other points of this embodiment are the same as those of the first embodiment, the same parts are designated by the same reference numerals and the duplicate description thereof will be omitted. In the second embodiment, since the outer circumference of the portion of the connecting rod 4 which is not covered with the covering member 15 is covered with the weather-resistant oil / fat 20, rust prevention is ensured.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the box culvert may have a trapezoidal cross-sectional shape, and three or more intermediate culverts 13 may be arranged side by side between the two connecting box culverts.

[0013]

This invention, according to the invention] is the unbonded material on the outer circumference of the connecting rod to form a coating member, the outer peripheral portion of the connecting rod within the sheath bore has covered by the covering member, the covering member
Weatherproof the outer circumference of the end of the connecting rod not covered by
Since it is covered with a natural fat and oil , rust can be prevented without injecting grout material into the sheath hole, workability at the time of connection is good and work efficiency can be improved, and the end part
It has an excellent effect that it can surely prevent the entire connecting rod including rust .

The present invention also relates to the inner peripheral surface of the sheath hole and the sheath.
A gap is left between the outer circumference of the connecting rod and the outer circumference of the connecting hole.
That the mortar was filled only in the connecting box.
After installing the box culvert once,
The mortar inside the sheath is removed, leaving a void inside the sheath hole.
Without removing the connecting rod that is passed through in the
Fix box culvert installation, culvert
The effect that it can be easily exchanged is obtained .

[Brief description of drawings]

FIG. 1 is a front view showing a connection box culvert to be connected in a box culvert connection structure according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a connection box culvert to be connected in the box culvert connection structure according to the embodiment of the present invention.

FIG. 3 is a side view showing a connected state of the box culvert according to the embodiment of the present invention.

FIG. 4 is a partial cross-sectional view showing a main part of the connection structure of the box culvert according to the first embodiment of the present invention.

FIG. 5 is a partial cross-sectional view showing an essential part of the connection structure of the box culvert according to the second embodiment of the present invention.

FIG. 6 is a partial cross-sectional view showing a conventional box culvert connection structure.

[Explanation of symbols]

 1 Connection Box Culvert 2 Connection Box 3 Sheath Hole 4 Connection Rod 4a Male Thread 5 Anchor Plate 6 Washer 7 Fixing Nut 10 Soft Packing 11 Limiting Member 13 Intermediate Culvert 15 Covering Member 20 Weatherproof Oil

Claims (1)

[Scope of utility model registration request] 1. A connection structure of a box culvert in which a connection rod is passed through a sheath hole of the box culvert and an end portion of the connection rod is fixed and connected in a connection box provided in the box culvert. outer circumference to form a coating member by unbonded material, the outer peripheral portion of said connecting rod in said sheath bore not covered by said covering member, the connecting rod is not covered by the covering member
Cover the outer circumference of the end of the
Between the inner peripheral surface of the and the outer periphery of the connecting rod passed through the sheath hole
With only a gap left in the box,
Box culvert connection structure characterized by being filled with rutar .