JPH1189067A - Flexible jointing device of conduit orthogonally crossing special portion of c-c-box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve seismic-proof without breaking a conduit itself, a U-shaped duct and a connecting aperture, etc., by fully utilizing the flexibility of buffer layer, buffering vibration, deviation or the like resulting from an external pressure applied on the conduit orthogonally crossing the special portion. SOLUTION: A U-shaped duct 3 in the constant width is installed at the external side portion of a connecting aperture 2 provided at the coupling sidewall of the special portion 1 of a C.C.BOX and the end of a conduit 7 of a single layer or stacked layers in the desired number are placed at the bottom portion of the U-shaped duct 3 via a cushion member (6). Moreover, a precast concrete plate 8 in the predetermined thickness is arranged vertically with the distribution of a gap (10) for the predetermined filling member to the end surface of the conduit 7, a soft material filling member 11 is supplied to this gap (10) for the filling member to form a buffer layer 11' and the U-shaped groove is covered with the precast concrete cover plate (12) to form a flexible jointing device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a so-called CCBO.
The present invention relates to a flexible joint device of a pipe section which is located in a wire common groove (a perforated pipe section) called X and is orthogonal to a C / C / BOX special section for crossing a road or the like.

[0002]

2. Description of the Related Art Conventionally, as a means for connecting a pipe section which crosses a road at right angles to a special section of a C.C.BOX which is a common groove form of underground buried electric wires, for example, a C.C.
An opening is provided in the connection side wall of the BOX special section, and a pipe section made of precast concrete for branching is simply inserted directly and a concrete is rolled up.
There is a method in which a duct sleeve is embedded in the connection side wall of the OX special part, and an end plate in which the connection sleeve is embedded is attached also to the end face of the pipe section, and both are connected by a connection pipe.

[0003]

However, as described above, C
・ In a mode in which the branch connection at the pipeline section crossing the road at the intersection or the like perpendicular to the C.BOX special section is simply a fixed shape, the load of an automobile or the like running on the ground is inevitably loaded. The amount of settlement caused by the difference causes stress to act on the connection,
In addition, in the case of receiving the vibration of the earthquake or the displacement of the ground,
If there is no elongation or displacement means between the C / C / BOX special section and the pipe section, cracks and breaks (cracks) are caused in the joints, which cannot be continued for long-term use. The problem remains, especially in recent years when earthquake measures are called for. That is, conventional pipe joints have not yet reached a configuration for improving the seismic performance.

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention does not directly insert the end of a pipe section crossing a road at an intersection or the like into a C / C / BOX special portion, but forms a U-shaped groove projecting outside the special portion. The above-mentioned problems can be solved by placing a soft filler layer around the pipe section with a predetermined thickness to provide an earthquake-resistant structure.
It is an object of the present invention to provide a flexible joint device of a pipe section orthogonal to a C-BOX special section.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a precast concrete pipe section orthogonal to a C.C.BOX special section which is buried underground across a road or the like, and has a C.C.BO section.
A U-shaped groove body having a fixed width is installed on the outer side of the connection opening provided on the connection side wall of the X special part, and an appropriate number of single-layer or laminated pipe lines are provided at the bottom of the U-shaped groove body via a cushion material. While placing the pipe end, a vertical length of a precast concrete slab having a predetermined thickness is disposed in the hollow portion of the pipe section and the U-shaped groove body in the cross-sectional direction, and a predetermined filler gap is disposed between the pipe section end face. Arrangement, filling the gap for this filler with a soft filler to form a buffer layer,
In addition, the U-shaped groove body is covered with a precast concrete lid plate.

In this case, the mounting position of the end of the pipe portion with respect to the U-shaped groove body is a position spaced apart from the C / C / BOX special portion by a fixed distance.

[0007] The cushion material is a rubber foam.

[0008] Further, the soft filler becomes a two-component mixed cold curing type soft filler.

As described above, the connection of the pipe section orthogonal to the C / C / BOX special section is made by connecting the appropriate number of pipes to the U-shaped groove provided on the connecting side wall of the C / C / BOX special section. A two-component, room-temperature-curing, soft filler is placed in the gap for the filler formed of a precast concrete slab in which the end is placed via a cushion material and is vertically arranged between the end face of the pipeline and the U-shaped groove body. In order to form a flexible joint that serves as a buffer layer, the joint part receives vibration caused by the load of automobiles and the like or vibration or displacement caused by an earthquake in the buried pipe section that crosses the road. Also, the end of the pipe portion is in the frame of the U-shaped groove body, is gripped by a buffer layer surrounding the cushioning material and the soft filler, and forms a flexible joint. The deviation in the direction is also buffered, causing cracks in the pipe body and U-shaped groove. There.

Also, in this case, since a fixed interval (clearance) is provided at the mounting position (connection portion) of the conduit portion with respect to the U-shaped groove body, the work of arranging cables from the C / C / BOX special portion side is simplified. Will lead to

Further, since the soft filler is a two-component mixture cold-setting filler, the construction is easy.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a flexible joint device of a pipe section orthogonal to a CC special box according to an embodiment of the present invention.

FIGS. 1 to 6 show an embodiment in which four perforated pipe sections are appropriately stacked in a U-shaped groove body according to the outer shape. Reference numeral 1 denotes a CC box special part for branching a pipe section buried in a road, such as an intersection position, and a connection opening 2 provided in a connection side wall 1a of the CC box special part 1. Outside,
The U-shaped groove body 3 having a constant width is placed on the base 4. 5
Is a fixture comprising a bolt and a locking plate for fixing the U-shaped groove body 3 to the CC special box 1 side. Reference numeral 6 denotes a cushion material (for example, 10 mm to 30 mm thick) formed of a rubber foam or the like having an appropriate thickness to be laid on the bottom 3 a of the U-shaped groove body 3. The end portion 7a of the portion 7 is formed in a single layer or a laminated state (in the drawing, the center is two steps and the right and left
The precast concrete slab 8 having a predetermined thickness h in the cross-sectional direction in the inner space portion 3b formed in the groove on the outer periphery of the group of pipes 7 is mounted on the U-shaped groove body 3 And a predetermined filler gap 10 (e.g., 20 mm to 30 mm width) between the inner wall 3c and the surface of the pipe portion 7 with the fixture 9 protruding from both inner walls 3c.
Are installed vertically. Numeral 11 denotes a two-component mixed room temperature hardening type soft filler which fills the filler gap 10 on the outer periphery of the pipe section 7 group. The soft filler 11 forms a buffer layer 11 '.
Is formed. Reference numeral 12 denotes a precast concrete lid plate that covers the upper surface of the U-shaped groove body 3 and also serves to suppress the precast concrete plate 8, and the flexible joint device 13 has the above overall configuration. 14 is a U-shaped groove body 3 and a lid plate 1
2 shows a fixture for locking 2;

Now, the operation will be described. First, as the construction of the flexible joint device 13, the outside of the connection opening 2 of the connection side wall 1a in the C / C / BOX special portion 1 facing the intersection position of the road and the like. The U-shaped groove body 3 having a constant width is arranged orthogonally. In this case, the end of the U-shaped groove body 3 is appropriately fixed to the connecting side wall 1a with the fixture 5.

Here, the end portion 7a of the precast concrete pipe portion 7 set to a length corresponding to the road width is carried in, and the rubber foam cushion material 6 previously laid on the bottom 3a of the U-shaped groove body 3 is placed on the end portion 7a. Then, it is placed in a single layer or a laminated state according to the cross-sectional shape of the pipe section 7. At this time, the mounting position of the end portion 7a of the pipe section 7 is set as a set at a fixed interval s (for example, 200 mm) from the connection opening 2 of the connection side wall 1a, and a cable (not shown) is used. The workability of bending and inserting should be good.

Next, the inner space 3b of the U-shaped groove 3 formed on the outer periphery of the conduit 7 mounted on the U-shaped groove 3 has a shape corresponding to the inner space 3b. A precast concrete slab 8 having a predetermined thickness is vertically arranged in a partition shape from the inner wall 3 c of the U-shaped groove body 3 with a fixture 9, and a fixed filler gap 10 is formed with the outer peripheral surface of the pipe portion 7. At this time, the central upper end portion of the filler gap 10 is left as the filling opening 10a.

Thereafter, a two-component mixed room temperature hardening type soft filler 11 is poured into the filler gap 10 around the group of conduits 7 placed in the U-shaped groove body 3, and is cured. Constant width (precast concrete slab thickness h, for example 150 mm
(Width) of the buffer layer 11 '. However, soft filler 1
In the filling operation of (1), a partition frame 15 having a fixed width from the surface of the pipe section 7 is erected in advance on both sides of the filler gap 10 so that the filler 11 does not leak outside.

Finally, the construction of the flexible joint device 13 is completed by covering the upper surface of the U-shaped groove body 3 with the lid plate 12 made of precast concrete and fixing it with the fixture 14. In this case, the upper surface of the precast concrete plate 8 and the upper surface of the soft filler 11 are configured to be suppressed by the cover plate 12.

Here, the pipe section 7 buried in the road includes:
Due to the passage of heavy objects such as automobiles, the amount of settlement differs from the sidewalk side, and as a result, vibrations and deviations appear at the connection parts. However, at the end 7a of the pipe 7 serving as the branch connection, a kind of buffer layer 11 'is formed around the cushioning material 6 made of rubber foam and the soft filler 11 so as to provide a flexible function. Since the movements such as vibration and displacement are absorbed, the groove surface of the U-shaped groove body 3 and the connection opening 2 of the C / C / BOX special portion 1 are not damaged. This flexibility function is also a kind of earthquake-resistant function.

However, the workability is improved by setting the shape of the U-shaped groove body 3 so that the width is constant and the height is changed according to the cross-sectional shape of the pipe portion 7 to be used.

[0021]

As described above, the flexible joint device of the pipe section orthogonal to the C / C / BOX special section of the present invention is appropriately provided in the U-shaped groove body installed in the connection opening of the special section. The end of the pipe portion is used as a support for mounting, and the end of the pipe portion is surrounded by a cushion material and a soft filler to form a kind of buffer layer, so that the buffer layer exhibits a flexible function. Vibration and misalignment caused by external pressure applied to the pipe section orthogonal to the special section are buffered, and the pipe section itself, U-shaped groove body, connection opening, etc. are not damaged, and the seismic performance is improved. Is achieved.

Further, since the mounting of the end of the conduit portion to the U-shaped groove is set at a fixed distance from the connection opening, the bending guide of the cable guided from the CC, BOX special portion side is easy. The workability of cable laying is improved (simplified), and the work environment is improved. This can reduce the cost as compared with the connection direction using the duct sleeve.

Further, since a filling gap for obtaining a soft filler having a predetermined thickness is formed by a precast concrete slab protruding from the U-shaped groove body side, a reliable gap is provided and the width of the soft filler is provided. As a precast concrete slab, a strip-shaped soft filler material suitable for the outer shape of the pipeline is easily formed, which is suitable for on-site construction. In addition, since the soft filler is a two-component mixed-room-temperature-curable soft filler, mixing can be performed on site, and the filling operation is good and the handling is easy. In addition, if the U-shaped groove body has a constant width and is changed only in height in accordance with the number of pipes to be mounted, there is an effect that the usability is improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of an embodiment of a flexible joint device of a pipe section orthogonal to a CC special section according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a cross-sectional view of a pipe section taken along the line AA of FIG. 2;

FIG. 4 is a plan view showing a conduit section placed in a U-shaped groove body facing a connection opening of a connection side wall in a special section of a CC box.

FIG. 5 is a side view showing the essential part.

FIG. 6 is an explanatory view of filling a soft filler material around a pipe portion placed in a U-shaped groove body. FIG. 6A is a diagram in which a pipe portion is placed at the bottom of a U-shaped groove body via a cushion material. FIG. 3B is a front view in which a precast concrete plate for forming a filler gap is disposed, and FIG. 3B is a front view in which a soft filler is filled in the filler gap and a precast concrete lid plate is covered. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 C / C / BOX special part 2 Connection opening 3 U-shaped groove body 3a Same bottom part 6 Cushion material 7 Precast concrete pipe part 7a Same end part 8 Precast concrete plate 10 Filler gap 11 Soft filler 12 Precast Concrete lid plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiichi Kobayashi 2-2-1-15 Kabuki-cho, Shinjuku-ku, Tokyo Residence within Kenken Concrete Industry Co., Ltd. (72) Inventor Jiro Kondo 2-2-2 Kabuki-cho, Shinjuku-ku, Tokyo No. 15 Inside Sumiken Concrete Industry Co., Ltd. (72) Inventor Motoya Sugiyama 2-2-1 Kabukicho, Shinjuku-ku, Tokyo Inside Sumiken Concrete Industry Co., Ltd. (72) Inventor Yasuo Endo 1-1, Takaban, Meguro-ku, Tokyo No. 10-6 Inside Hako Co., Ltd.

Claims (4)

[Claims] 1. C.C. to be buried underground across roads, etc.
In a precast concrete pipe section orthogonal to the BOX special section, a U-shaped groove body having a constant width is installed outside a connection opening provided in a connection side wall of the CC special box, and the U-shaped groove body is provided. A suitable number of single-layer or laminated pipe section ends are placed on the bottom of the pipe via a cushion material, and a predetermined thickness of a precast concrete plate is placed on the inner space of the pipe section and the U-shaped groove body in the cross-sectional direction. Is a vertical arrangement in which a predetermined filler gap is arranged with the end of the pipe section, a soft filler is filled in the filler gap to form a buffer layer, and the U-shaped groove body is precast concrete. C characterized by being covered with a lid plate
・ Flexible joint device for pipe section orthogonal to C.BOX special section. 2. The C.C.BOX special part according to claim 1, wherein the mounting position of the end of the pipe portion with respect to the U-shaped groove body is a position spaced apart from the C.C.BOX special part by a fixed distance. A flexible joint device for a perpendicular pipe section. 3. The flexible joint device according to claim 1, wherein the cushion material is a rubber foam. 4. The flexible joint device according to claim 1, wherein the soft filler is a two-pack mixed room-temperature-curable soft filler.