JPH09125352A - Soil discharge prevention method and device in circumference of underground buried pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent soil in the circumference of an underground buried cable pipe from discharging by flow of underground infiltration rain water, underground water, etc., so as to become hollow. SOLUTION: In an excavated groove (E) for burying cable pipes in the underground, after the circumference of a cable pipe group A1, A2, A3, A4 laid in the excavated groove (E) is surrounded with a cable pipe group surrounding foam plastic body 20, the soil is backfilled in the excavation groove in the circumference of this cable pipe groove and the circumference of clearances and recesses between the cable pipes to form a soil discharge passage caused by underground infiltration rain water, underground water, etc., is surrounded so as to prevent the soil from discharging.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing earth and sand around an underground cable conduit from flowing out due to rainwater or the like.

[0002]

2. Description of the Related Art Underground buried pipelines such as direct buried cable laying pipelines that are directly buried underground along a road have a plurality of cable pipelines A1, A2, A3, as shown in FIG. A4, etc. are attached to individual holders B1, B2, B of the cable tube holder B.
3 and B4 are installed side by side by holding them at predetermined vertical and horizontal intervals, and the cable tube holder B is a concave groove for fitting on each side surface of each cable tube holder B1, B2, B3, B4, etc. And the ridges are fitted to each other and the bands are tightened and coupled in the band groove Ba on the outer periphery to hold the individual cable pipes at predetermined intervals. In this way, the cable pipe group A in which a plurality of cable pipes are held at a predetermined interval is installed in the excavation groove E excavated from the ground C to the soil D, and in the excavation groove E around the cable pipe A. The soil excavated to the ground C is backfilled.

[0003]

As described above, in a cable conduit in which a plurality of cable pipes are laid one on top of the other, the backfill soil is sufficiently filled in the gaps G and the depressions F between the cable pipes and compacted. Since it has not been done, the backfilling of the surroundings of the pipe, especially the internal gap G between each pipe and the hollow space F between the pipe surfaces due to the infiltration of rainwater into the ground and the flow of groundwater etc. over the years. As a result, the flow path was formed along the pipeline, and as a result, a cavity was created at the place where the sediment had washed away, which caused a problem such as a collapse of the ground surface around the cable pipeline.

It is an object of the present invention to provide a method of preventing sediment outflow around an underground buried pipeline, which prevents the sediment around the conduit from flowing away to form a cavity in the underground buried cable pipeline.

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, a method of preventing sediment outflow around an underground buried pipeline according to the present invention is as follows: (1) In a drilling groove E for burying a cable pipe underground, a drilling groove E A plurality of cable tubes A1, A laid inside
By covering the circumference of 2, A3, and A4 groups with a cable tube group covering and covering plastic foam body 20, and refilling soil in the excavation groove around the cable tube group to form an underground buried cable pipeline. This is a method to prevent the outflow of sediment around the underground buried pipeline.

(2) Further, according to the method of preventing sediment outflow around an underground burial pipe of the present invention, a plurality of cable pipes A1, A2 laid in the digging trench in the digging trench E for burying the cable pipe underground. At least the upper surface 1 of the A3 and A4 groups
And the foamed resin material is sprayed onto the hollow spaces 5, 6, 7 between the cable pipes on the surfaces 2 and 3 on both the left and right sides so as to be substantially the same surface as the tangential surface 10 of the surface of the adjacent cable pipe. The filling portions 11, 12, 13 are formed, and soil is backfilled in the excavation groove around the cable pipe group to form an underground buried cable pipe line, thereby preventing the outflow of earth and sand around the underground pipe line. Is the way.

When the cable tube group in the excavation groove E is covered with the cable tube group covering foamed plastic body 20 as in the above (1), the hollow space between the cable tubes is covered. If earth and sand are backfilled in the space inside the excavation groove E around the cable tube group covering foamed plastic body 20, the backfilled earth and sand washed-out portion of the hollow space between the respective cable tubes as in the conventional case is not formed. The backfilled sediment is prevented from being washed away by the flow of seepage rainwater or groundwater. In the method (1), since the cable pipe group covering and covering the cable pipe group is covered with the expanded plastic body 20, the cable pipe group covering work in the narrow excavation groove E becomes easy.

As described in (2) above, the cable pipes A1, A2, A3, A on at least the upper surface and the left and right side surfaces 1, 2, 3 of the cable pipe group A in the excavation trench E.
The foamed resin material is sprayed onto the hollow spaces 5, 6, and 7 between the four to form foamed resin-filled portions 11, 12, and 13, and the surfaces of the foamed resin-filled portions 11, 12, and 13 are adjacent cables. By making the surface substantially the same as the tangential surface 10 between the surfaces of the tubes, the surfaces on the upper side and both the left and right sides of the cable tube group A are smooth surfaces with no cavities. In this way, by backfilling excavated soil around the cable pipe group where the upper side surface and the left and right side surfaces are not dented to form an underground buried cable pipeline, In addition, since it does not enter the hollow spaces on the upper and left and right side surfaces of the cable pipe group, and therefore the uncompacted backfilled sediment in the hollow spaces is not formed, the flow of underground seepage rainwater and groundwater, etc. Backfilling of the hollows in the surface of the cable pipe will not be washed away, and there will be no accidental collapse of the ground surface around the cable conduit. In the method of (2) above, the foamed resin is directly sprayed around the cable pipe group in the excavation groove at the cable pipe burying work site, so that the arrangement of the cable pipes in the excavation groove is not accurately aligned. The foamed resin filled portion can be formed without a gap.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows the first embodiment of the present invention, and FIG. 3 shows the second embodiment. In FIG. 2 showing the first embodiment, E is a cross section of the excavation groove under the ground C, and A1, A2, A3, and A4 are cross sections of the cable pipe groups embedded in the excavation groove E. This cable bundle is shown in Figure 1.
As shown in, the plurality of cable tubes A1, A2, A3,
A4 and the like are lined up in the excavation groove E and held by the cable pipe holder B at predetermined longitudinal and lateral intervals.
The illustration of the cable pipe holder B shown in FIG. 1 is omitted, and the cable pipes A1, A2, A arranged in the excavation groove E are shown.
Only the 3 and A4 groups are shown in cross section. To hold each cable tube, a holding tool B as shown in FIG. 1 may be used, but as shown in FIG. 4, each cable tube A1, A2, A
It is also possible to place a spacer S in the central gap where 3 and A4 are arranged side by side, and bind and hold the outer circumference of this cable tube group with a band B1, a band B2 and a bolt B3.

In FIG. 2, reference numeral 20 denotes a cable tube group covering foamed plastic body made of foamed plastic, which covers the cable tube group arranged in the excavation groove E. This cable tube encased foamed plastic body 20
In the digging trench E, the upper-arranged cable tube group covering foamed plastic body 21 covering the cable tube groups A1 and A2 arranged on the upper side and the cable tube groups A3 and A4 arranged on the lower side. And a lower arrayed cable tube group covering and covering foamed plastic body 22 for covering the upper and lower sides, and the upper and lower cable tube group covering and covering foamed plastic bodies 21 and 22 are respectively composed of an upper half part a and a lower half part b. To do.

The above-mentioned upper arrayed cable tube group enclosing foamed plastic body 21 comprises an upper half part 21a and a lower half part 21b. The upper and lower half cable parts 21a, 21b define the upper arrayed cable tube group A1, A2 as the upper part. The upper array cable tube groups A1 and A2 are covered and mounted by fitting the upper and lower halves together at the sandwiching edge 21c from the lower side. The lower arrayed cable tube group covering foamed plastic body 22 is composed of an upper half portion 22a and a lower half portion 22b, and the upper and lower half cable portions A3 and A4 are used as upper and lower portions. The lower arrayed cable tube groups A3 and A4 are covered and mounted by sandwiching them from the side and combining the upper and lower halves with the mating edge 22c. In this way, the cable tube group covering foamed plastic body 20 for covering the cable tube group arranged in the excavation groove E has the cable tube group A portion between the cable tube holders B and B shown in FIG. It is attached so as to cover the cable tube group, and the foamed plastic body 20 for covering the cable tube group is molded at the factory so that it can fit and cover the circumference of the cable tube group, and is transported to the cable tube installation site. To do. Note that, in FIG. 2, B shows the portion B of the cable tube holder shown in FIG.

The cable pipe group covering the cable pipe group arranged in the excavation groove E as described above is covered with the foamed plastic body 2
When it is covered with 0, the hollow space between the cable tubes is covered. In this way, after covering the cable pipe group with the cable pipe group covering foamed plastic body 20, the space in the surrounding excavation groove E is filled with earth and sand and sufficiently compacted to embed the cable pipe in the excavation groove E. Install. This backfill earth and sand do not enter into the hollow spaces between the cable pipes as in the past, and since the backfill earth and sand parts that cannot be compacted as in the past are not formed, there is no possibility of infiltrating underground water such as in the past. It is possible to prevent the backfill soil from being washed away in the hollow space of the cable pipe group due to the flow of groundwater.

FIG. 3 shows a second embodiment of the present invention.
1, 2 and 3 show the upper and left and right surfaces of the cable pipe group A, 1 is the upper surface of the cable pipe group A, 2 is the left surface of the cable pipe group A, and 3 is the right side of the cable pipe group A. Is the surface of. 4 shows the lower surface. Reference numerals 5, 6, and 7 indicate recessed cavities between the cable tubes on the upper surfaces 1 and 2 on the left and right sides, respectively, and reference numeral 5 indicates a surface recessed cavity between the cable tubes A1 and A2 on the upper surface 1. And 6 is a surface recessed space between the cable pipes A1 and A3 on the left surface 2, 7
Is a surface recessed space between the cable tubes A2 and A4 on the right surface 3. 8 is a cable pipe A3, A4 on the lower surface
The hollow space between, 9 is the central gap inside each cable tube. Further, for convenience of explanation of the present invention, each dashed line 10 on each of the upper and left and right surfaces 1, 2, and 3 shown for convenience of description of the present invention indicates a tangent plane between the surfaces of adjacent cable pipes on each of the surfaces 1, 2, and 3. , The dashed line 10-1 is the tangential surface between the top surface A1-1 of the cable tube A1 on the upper surface 1 and the top surface A2-1 of the adjacent cable tube A2, and the broken line 10-2 is the cable tube on the left surface 2 A tangential surface between the top surface A1-2 of A1 and the top surface A3-2 of the adjacent cable tube A3, a broken line 10
-3 is the top A of the surface of the cable tube A2 on the right surface 3
It is a tangential surface between the surface apex A4-3 of the cable tube A4 adjacent to 2-3.

Of the upper and lower side surfaces and the left and right side surfaces of the cable tube group A, at least the upper surface 1 and the left and right side surfaces 2 and 3 have hollow spaces 5 between the respective cable tubes, 6, 7, ie on the upper surface 1,
A surface-side recessed cavity 5 between the cable tube A1 and the cable tube A2 and a surface-sided recessed area 6 between the cable tube A1 and the cable tube A3 on the left surface 2 and a right-side surface 3 A foaming undiluted solution of a foaming resin such as polyurethane is sprayed into the hollow space 7 on the surface side between A1 and the cable pipe A4 by a spraying method, so that each hollow space 5, 6 and 7 is formed into innumerable closed cells. Fill with polyurethane foam contained inside. Reference numeral 11 denotes a portion of the upper surface 1 filled with the foamed resin that has been sprayed onto the hollow space 5.
Reference numeral 12 denotes a foamed resin filling portion blown into the hollow space 6 on the left side surface 2, and 13 denotes a foamed resin filling portion blown to the hollow space 7 on the right side surface 3. The blow-filling of the foamed resin in the hollow spaces 5, 6 and 7 between the cable pipes is performed by the foamed resin filling parts 11 and 12,
The surface of 13 should be approximately the same as the tangential surface 10 between the surfaces of adjacent cable tubes. That is, the surface of the foamed resin filled portion 11 in the surface recess 5 between the cable tubes A1 and A2 on the upper surface 1 has a tangential surface 10- between the surface tops A1-1 and A2-1 of both cable tubes. The foamed resin undiluted solution is sprayed and filled so as to be a smooth surface almost the same as 1, and the surface of the foamed resin filled portion 12 is formed in the surface hollow 6 between the cable pipes A1 and A3 on the left surface 2. The tangential surface 10- between the tops A1-2 and A3-2 of both cable tube surfaces
The foamed resin undiluted solution is sprayed and filled so as to have a smooth surface almost the same as that of No. 2, and both cable pipes A1 on the right side surface 3,
In the surface hollow 7 between A4, foam is formed so that the surface of the foamed resin filled portion 13 is a smooth surface almost the same as the tangential surface 10-3 between the cable tube surface tops A1-3 and A4-3. Spray and fill the resin stock solution.

As described above, at least the upper surface 1 of the cable pipe group A and the surface recessed space 5 between the respective cable pipes A1, A2, A3, A4 on the left and right side surfaces 2, 3.
The foamed resin stock solution was sprayed onto the resin 6 and 7 by a spraying method, and the foamed resin filled portions 11 in the respective hollow spaces were
By forming the foamed resin filled portion so that the surfaces of 12 and 13 are substantially the same surface as the tangential surface 10 between the surfaces of the adjacent cable pipes, the upper side of the cable pipe group A laid in the excavation groove E and The surfaces on both the left and right sides are smooth surfaces with no hollows. In this way, by backfilling the earth and sand around the cable pipe group where the upper side surface and the left and right side surfaces are both smoothed to form an underground buried cable pipe line, the backfilled sand is It is not necessary to enter the hollows on the upper and left and right sides, and the uncompacted backfilled sand in the hollows is not formed. The backfilled soil is prevented from being washed away in the void.

In the second embodiment of the present invention described above, with respect to the hollow space 8 between the cable pipes A3 and A4 on the lower surface 4 of the cable pipe group A and the internal gap 9 between the cable pipes, Although the foamed resin is not sprayed and filled, when the foamed resin is sprayed onto the recessed cavities 5, 6, 7 on the upper, left and right surfaces 1, 2, 3 as described above, the foamed resin has an internal gap 9 There is no problem even if it invades and is filled up to the bottom side, and the foamed resin filling portion 14 is formed by spraying the foamed resin also on the lower surface side recessed cavity 2u on the left side surface 2, and the lower surface side recessed cavity on the right side surface 3 is formed. The foamed resin filling portion 15 may be formed by spraying foamed resin on 3u as well.

[0017]

As described above, the method of preventing sediment outflow around an underground buried pipe according to the present invention is a foamed plastic body covering a cable pipe group around a laid cable pipe group in an underground underground excavation trench of a cable pipe. Since the soil is backfilled with soil, the cable ducts do not have the gaps or depressions that would otherwise be required to form channels for underground rainwater, groundwater, etc. It is possible to prevent the water from being washed away, and prevent the ground surface from accidentally collapsing around the cable pipeline. Further, by using the foamed plastic body covering the cable pipe group, the work of covering the cable pipe group in the narrow excavation groove becomes easy.

Further, according to the present invention, the foamed resin is sprayed onto the recessed space between the cable pipes on at least the upper surface and the both side surfaces of the plurality of cable pipe groups laid in the excavation groove to adjoin the adjacent cable pipes. It was filled so that the surface was almost the same as the tangential surface of the surface, and the excavated soil was backfilled in the excavation groove around this cable pipe group. It becomes a pipeline in which no gaps or dents that should be formed are formed. Therefore, it is possible to prevent the flow of earth and sand, and to prevent a depression of the ground surface around the cable pipeline. Further, by blowing the foamed resin directly around the cable pipe group in the excavation groove at the cable pipe burying work site, even if the arrangement of the cable pipes is not uniform, the foamed resin filled portion can be formed without a gap. .

[Brief description of the drawings]

[Fig. 1] Diagram showing underground cable pipeline

FIG. 2 is a diagram showing a first embodiment of the present invention.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a view showing another example of the cable tube holder.

[Explanation of symbols]

1: Upper surface of the cable pipe group 2: Left surface of the cable pipe group 3: Right surface of the cable pipe group 5: Dimples on the upper surface 6: Dimples on the left surface 7: Dimples on the right surface 10: Tangent surface of adjacent cable tube surface 10-1: Tangent surface of adjacent cable tube surface on upper surface 10-2: Tangent surface of adjacent cable tube surface on left surface 10-3: Tangent surface of adjacent cable tube surface on right surface 11 , 12, 13: Foamed resin filled portion 20: Cable tube group covering foamed plastic body 21: Upper side arrangement Cable tube group covering foamed plastic body 21a: 21 upper half portion 21b: 21 lower half portion 22: Lower side arrangement Cable tube group covering foamed plastic body 22a: 22 upper half part 22b: 22 lower half part A: Cable tube group A1, A2, A3, A4: Cable tube B: Buru tube holder E: Drilling groove

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[Procedure amendment]

[Submission date] March 15, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of Invention] Method of preventing sediment outflow around underground buried pipelines
And equipment

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing earth and sand around an underground cable conduit from flowing out due to rainwater or the like.

[0002]

2. Description of the Related Art Underground buried pipelines such as direct buried cable laying pipelines that are directly buried underground along a road have a plurality of cable pipelines A1, A2, A3, as shown in FIG. A4, etc. are attached to individual holders B1, B2, B of the cable tube holder B.
3 and B4 are installed side by side by holding them at predetermined vertical and horizontal intervals, and the cable tube holder B is a concave groove for fitting on each side surface of each cable tube holder B1, B2, B3, B4, etc. And the ridges are fitted to each other and the bands are tightened and coupled in the band groove Ba on the outer periphery to hold the individual cable pipes at predetermined intervals. In this way, the cable pipe group A in which a plurality of cable pipes are held at a predetermined interval is installed in the excavation groove E excavated from the ground C to the soil D, and in the excavation groove E around the cable pipe A. The soil excavated to the ground C is backfilled.

[0003]

As described above, in a cable conduit in which a plurality of cable pipes are laid one on top of the other, the backfill soil is sufficiently filled in the gaps G and the depressions F between the cable pipes and compacted. Since it has not been done, the backfilling of the surroundings of the pipe, especially the internal gap G between each pipe and the hollow space F between the pipe surfaces due to the infiltration of rainwater into the ground and the flow of groundwater etc. over the years. As a result, the flow path was formed along the pipeline, and as a result, a cavity was created at the place where the sediment had washed away, which caused a problem such as a collapse of the ground surface around the cable pipeline.

It is an object of the present invention to provide a method of preventing sediment outflow around an underground buried pipeline, which prevents the sediment around the conduit from flowing away to form a cavity in the underground buried cable pipeline.

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, a method of preventing sediment outflow around an underground buried pipeline according to the present invention is as follows: (1) In a drilling groove E for burying a cable pipe underground, a drilling groove E A plurality of cable tubes A1, A laid inside
By covering the circumference of 2, A3, and A4 groups with a cable tube group covering and covering plastic foam body 20, and refilling soil in the excavation groove around the cable tube group to form an underground buried cable pipeline. This is a method to prevent the outflow of sediment around the underground buried pipeline.

(2) Further, according to the method of preventing sediment outflow around an underground burial pipe of the present invention, a plurality of cable pipes A1, A2 laid in the digging trench in the digging trench E for burying the cable pipe underground. At least the upper surface 1 of the A3 and A4 groups
And the foamed resin material is sprayed onto the hollow spaces 5, 6, 7 between the cable pipes on the surfaces 2 and 3 on both the left and right sides so as to be substantially the same surface as the tangential surface 10 of the surface of the adjacent cable pipe. The filling portions 11, 12, 13 are formed, and soil is backfilled in the excavation groove around the cable pipe group to form an underground buried cable pipe line, thereby preventing the outflow of earth and sand around the underground pipe line. Is the way.

(3) In addition, in the vicinity of the underground buried pipeline of the present invention
The sediment outflow prevention device is provided with a plurality of cable pipes A1, A2, A.
Hold A and A4 with a cable tube holder B at a distance,
Cable pipe group between the cable pipe holders B, B
A cable tube group enclosing the cable tube group A around A
The foam plastic body 20 is provided.

When the cable tube group in the excavation groove E is covered with the cable tube group covering foamed plastic body 20 as in the above (1), the hollow space between the cable tubes is covered. If earth and sand are backfilled in the space inside the excavation groove E around the cable tube group covering foamed plastic body 20, the backfilled earth and sand washed-out portion of the hollow space between the respective cable tubes as in the conventional case is not formed. The backfilled sediment is prevented from being washed away by the flow of seepage rainwater or groundwater. In the method (1), since the cable pipe group covering and covering the cable pipe group is covered with the expanded plastic body 20, the cable pipe group covering work in the narrow excavation groove E becomes easy.

As described in (2) above, at least the upper surface and the left and right side surfaces 1, 2, 3 of the cable pipe group A in the excavation trench .
The foamed resin material is sprayed onto the hollows 5, 6, 7 between the cable pipes A1, A2, A3, A4 to form the foamed resin filled portions 11, 12, 13 and the foamed resin filled portions are formed. By making the surfaces of 11, 12, and 13 substantially the same as the tangential surface 10 between the surfaces of the adjacent cable pipes, the upper surface and the left and right surfaces of the cable pipe group A are smooth surfaces with no hollows. In this way, by backfilling excavated soil around the cable pipe group where the upper side surface and the left and right side surfaces are not dented to form an underground buried cable pipeline, In addition, since it does not enter the hollow spaces on the upper and left and right side surfaces of the cable pipe group, and therefore the uncompacted backfilled sediment in the hollow spaces is not formed, the flow of underground seepage rainwater and groundwater, etc. Backfilling of the hollows in the surface of the cable pipe will not be washed away, and there will be no accidental collapse of the ground surface around the cable conduit. In the method of (2) above, the foamed resin is directly sprayed around the cable pipe group in the excavation groove at the cable pipe burying work site, so that the arrangement of the cable pipes in the excavation groove is not accurately aligned. The foamed resin filled portion can be formed without a gap.

Further, the present invention constructed as described in (3) above.
The sediment outflow prevention device around the underground buried pipeline in
Cable in the excavation trench at the cable laying site
Attach the cable tube group covering foam plastic body 20 to the tube
Instead of doing the work,
Cable tube group A and cable tube group covering foam plastic body 2
Make a product with a structure with 0 attached, and
It can be transported to the cable laying site as it is and laid in the excavation trench.
The installation work can be speeded up.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows the first embodiment of the present invention, and FIG. 3 shows the second embodiment. In FIG. 2 showing the first embodiment, E is a cross section of the excavation groove under the ground C, and A1, A2, A3, and A4 are cross sections of the cable pipe groups embedded in the excavation groove E. This cable bundle is shown in Figure 1.
As shown in, the plurality of cable tubes A1, A2, A3,
A4 and the like are lined up in the excavation groove E and held by the cable pipe holder B at predetermined longitudinal and lateral intervals.
The illustration of the cable pipe holder B shown in FIG. 1 is omitted, and the cable pipes A1, A2, A arranged in the excavation groove E are shown.
Only the 3 and A4 groups are shown in cross section. To hold each cable tube, a holding tool B as shown in FIG. 1 may be used, but as shown in FIG. 4, each cable tube A1, A2, A
It is also possible to place a spacer S in the central gap where 3 and A4 are arranged side by side, and bind and hold the outer circumference of this cable tube group with a band B1, a band B2 and a bolt B3.

In FIG . 2, reference numeral 20 denotes a cable tube group covering plastic foam body made of foamed plastic, which covers the cable tube group arranged in the excavation groove E. This cable tube encased foamed plastic body 20
In the digging trench E, the upper-arranged cable tube group covering foamed plastic body 21 covering the cable tube groups A1 and A2 arranged on the upper side and the cable tube groups A3 and A4 arranged on the lower side. And a lower arrayed cable tube group covering and covering foamed plastic body 22 for covering the upper and lower sides, and the upper and lower cable tube group covering and covering foamed plastic bodies 21 and 22 are respectively composed of an upper half part a and a lower half part b. To do.

The above-mentioned expanded array cable tube group enclosing foamed plastic body 21 comprises an upper half part 21a and a lower half part 21b. The upper and lower half parts 21a, 21b respectively define the upper array cable tube group A1, A2 as the upper part. The upper array cable tube groups A1 and A2 are covered and mounted by fitting the upper and lower halves together at the sandwiching edge 21c from the lower side. The lower arrayed cable tube group covering foamed plastic body 22 is composed of an upper half portion 22a and a lower half portion 22b, and the upper and lower half cable portions A3 and A4 are used as upper and lower portions. The lower arrayed cable tube groups A3 and A4 are covered and mounted by sandwiching them from the side and combining the upper and lower halves with the mating edge 22c. In this way, the cable tube group covering foamed plastic body 20 for covering the cable tube group arranged in the excavation groove E has the cable tube group A portion between the cable tube holders B and B shown in FIG. It is attached so as to cover the cable tube group, and the foamed plastic body 20 for covering the cable tube group is molded at the factory so that it can fit and cover the circumference of the cable tube group, and is transported to the cable tube installation site. To do. Note that, in FIG. 2, B shows the portion B of the cable tube holder shown in FIG.

As described above, the cable pipe group disposed in the excavation groove E is covered with the foamed plastic body 2 for covering the cable pipe group.
When it is covered with 0, the hollow space between the cable tubes is covered. In this way, after covering the cable pipe group with the cable pipe group covering foamed plastic body 20, the space in the surrounding excavation groove E is filled with earth and sand and sufficiently compacted to embed the cable pipe in the excavation groove E. Install. This backfill earth and sand do not enter into the hollow spaces between the cable pipes as in the past, and since the backfill earth and sand parts that cannot be compacted as in the past are not formed, there is no possibility of infiltrating underground water such as in the past. It is possible to prevent the backfill soil from being washed away in the hollow space of the cable pipe group due to the flow of groundwater.

FIG . 3 shows a second embodiment of the present invention,
1, 2 and 3 show the upper and left and right surfaces of the cable pipe group A, 1 is the upper surface of the cable pipe group A, 2 is the left surface of the cable pipe group A, and 3 is the right side of the cable pipe group A. Is the surface of. 4 shows the lower surface. Reference numerals 5, 6, and 7 indicate recessed cavities between the cable tubes on the upper surfaces 1 and 2 on the left and right sides, respectively, and reference numeral 5 indicates a surface recessed cavity between the cable tubes A1 and A2 on the upper surface 1. And 6 is a surface recessed space between the cable pipes A1 and A3 on the left surface 2, 7
Is a surface recessed space between the cable tubes A2 and A4 on the right surface 3. 8 is a cable pipe A3, A4 on the lower surface
The hollow space between, 9 is the central gap inside each cable tube. Further, for convenience of explanation of the present invention, each dashed line 10 on each of the upper and left and right surfaces 1, 2, and 3 shown for convenience of description of the present invention indicates a tangent plane between the surfaces of adjacent cable pipes on each of the surfaces 1, 2, and 3. , The dashed line 10-1 is the tangential surface between the top surface A1-1 of the cable tube A1 on the upper surface 1 and the top surface A2-1 of the adjacent cable tube A2, and the broken line 10-2 is the cable tube on the left surface 2 A tangential surface between the top surface A1-2 of A1 and the top surface A3-2 of the adjacent cable tube A3, a broken line 10
-3 is the top A of the surface of the cable tube A2 on the right surface 3
It is a tangential surface between the surface apex A4-3 of the cable tube A4 adjacent to 2-3.

The top of the cable tube group A, lower sides and the left, out of right sides, at least the upper surface 1 and the right and left sides of the surface 2, the cavity 5 the recesses between each cable pipes, 6, 7, ie on the upper surface 1,
A surface-side recessed cavity 5 between the cable tube A1 and the cable tube A2 and a surface-sided recessed area 6 between the cable tube A1 and the cable tube A3 on the left surface 2 and a right-side surface 3 A foaming undiluted solution of a foaming resin such as polyurethane is sprayed into the hollow space 7 on the surface side between A1 and the cable pipe A4 by a spraying method, so that each hollow space 5, 6 and 7 is formed into innumerable closed cells. Fill with polyurethane foam contained inside. Reference numeral 11 denotes a portion of the upper surface 1 filled with the foamed resin that has been sprayed onto the hollow space 5.
Reference numeral 12 denotes a foamed resin filling portion blown into the hollow space 6 on the left side surface 2, and 13 denotes a foamed resin filling portion blown to the hollow space 7 on the right side surface 3. The blow-filling of the foamed resin in the hollow spaces 5, 6 and 7 between the cable pipes is performed by the foamed resin filling parts 11 and 12,
The surface of 13 should be approximately the same as the tangential surface 10 between the surfaces of adjacent cable tubes. That is, the surface of the foamed resin filled portion 11 in the surface recess 5 between the cable tubes A1 and A2 on the upper surface 1 has a tangential surface 10- between the surface tops A1-1 and A2-1 of both cable tubes. The foamed resin undiluted solution is sprayed and filled so as to be a smooth surface almost the same as 1, and the surface of the foamed resin filled portion 12 is formed in the surface hollow 6 between the cable pipes A1 and A3 on the left surface 2. The tangential surface 10- between the tops A1-2 and A3-2 of both cable tube surfaces
The foamed resin undiluted solution is sprayed and filled so as to have a smooth surface almost the same as that of No. 2, and both cable pipes A1 on the right side surface 3,
In the surface hollow 7 between A4, foam is formed so that the surface of the foamed resin filled portion 13 is a smooth surface almost the same as the tangential surface 10-3 between the cable tube surface tops A1-3 and A4-3. Spray and fill the resin stock solution.

As described above, the surface recess 5 between at least the upper surface 1 and the left and right surfaces 2, 3 of the cable tube group A between the cable tubes A1, A2, A3, A4.
The foamed resin stock solution was sprayed onto the resin 6 and 7 by a spraying method, and the foamed resin filled portions 11 in the respective hollow spaces were
By forming the foamed resin filled portion so that the surfaces of 12 and 13 are substantially the same surface as the tangential surface 10 between the surfaces of the adjacent cable pipes, the upper side of the cable pipe group A laid in the excavation groove E and The surfaces on both the left and right sides are smooth surfaces with no hollows. In this way, by backfilling the earth and sand around the cable pipe group where the upper side surface and the left and right side surfaces are both smoothed to form an underground buried cable pipe line, the backfilled sand is It is not necessary to enter the hollows on the upper and left and right sides, and the uncompacted backfilled sand in the hollows is not formed. The backfilled soil is prevented from being washed away in the void.

In the second embodiment of the present invention described above, with respect to the hollow space 8 between the cable pipes A3, A4 on the lower surface 4 of the cable pipe group A and the internal gap 9 between the cable pipes, Although the foamed resin is not sprayed and filled, when the foamed resin is sprayed onto the recessed cavities 5, 6, 7 on the upper, left and right surfaces 1, 2, 3 as described above, the foamed resin has an internal gap 9 There is no problem even if it invades and is filled up to the bottom side, and the foamed resin filling portion 14 is formed by spraying the foamed resin also on the lower surface side recessed cavity 2u on the left side surface 2, and the lower surface side recessed cavity on the right side surface 3 is formed. The foamed resin filling portion 15 may be formed by spraying foamed resin on 3u as well.

5 to 7 show the underground buried pipeline of the present invention.
2 shows the sediment outflow prevention device. Figure 5: Covering the cable tube group
A foam plastic half 20a is shown in FIG.
Shown in FIG. 1 is a cable tube group covering foam foam plastic of the first embodiment.
A factory with the same shape as the upper and lower half parts 21a and 21b
It is made of foam plastic with a cable tube
A semi-circular groove 20b that fits around half the circumference is provided. 20c is 2
Two foam plastic halves 20a, 20a cable
It is a joint surface when the tubes are sandwiched and fitted from above and below. This case
The length of the bull tube group covering foamed plastic body half portion 20a is
The cable between the cable tube holders B and B shown in FIG.
The length is the same as that of the le tube.

Foamed plastic covering the above cable tube group
The body half 20a is
As shown in the sectional view of FIG. 6 and the front view of FIG.
Attached to the cable tube group A1, A2 sandwiched from above and below
The cable tube groups A3, A arranged on the lower side as well as
Attach it to 4 by sandwiching them from above and below, and aligning these
Foamed plastic half device cable tube group A
Are held by the cable tube holder B at intervals. this
As shown in FIG.
The configuration in which the cable tube group A is attached is as shown in FIG.
At intervals with cable tubes A1, A2, A3, A4
Cable between the held cable tube holders B, B
A cable pipe that surrounds this cable pipe group A around the pipe pipe group A
The configuration is such that the group covering foam plastic body 20 is provided. What
Projecting out of the cable tube holder B on both left and right sides in FIG.
At the end of the cable
Have been killed.

The present invention manufactured in the factory as described above
Installed a cable pipe cloth to prevent sediment outflow around the underground buried pipeline
Carry it to the construction site, and in the same way as the state shown in FIG.
It is installed inside, and earth and sand are backfilled in the space inside the excavation groove around it.
If fully compacted, the backfilled soil will be between the cable pipes.
Without entering, a flow path for underground seepage water etc. is formed as before.
And at the same time, the cable pipes A1, A2, A
Cable tube holder that holds 3 and A4 at intervals
B forms a barrier to the water flow in the gap of each cable pipe
Therefore, the flow of underground seepage rainwater and groundwater as in the past
Of backfilled sand in the hollow space of the cable pipe group due to
It is possible to prevent spillage.

[0022]

As described above, the method of preventing sediment outflow around an underground buried pipe according to the present invention is a foamed plastic body covering a cable pipe group around a laid cable pipe group in an underground underground excavation trench of a cable pipe. Since the soil is backfilled with soil, the cable ducts do not have the gaps or depressions that would otherwise be required to form channels for underground rainwater, groundwater, etc. It is possible to prevent the water from being washed away, and prevent the ground surface from accidentally collapsing around the cable pipeline. Further, by using the foamed plastic body covering the cable pipe group, the work of covering the cable pipe group in the narrow excavation groove becomes easy.

Further , according to the present invention, the foamed resin is sprayed onto the recessed space between the cable pipes at least on the upper surface and the both side surfaces of the plurality of cable pipe groups laid in the excavation groove to adjoin the adjacent cable pipes. It was filled so that the surface was almost the same as the tangential surface of the surface, and the excavated soil was backfilled in the excavation groove around this cable pipe group. It becomes a pipeline in which no gaps or dents that should be formed are formed. Therefore, it is possible to prevent the flow of earth and sand, and to prevent a depression of the ground surface around the cable pipeline. Further, by blowing the foamed resin directly around the cable pipe group in the excavation groove at the cable pipe burying work site, even if the arrangement of the cable pipes is not uniform, the foamed resin filled portion can be formed without a gap. .

Further, the device of the present invention is installed in a factory in advance.
In addition, the cable tube group is covered with a foamed plastic
Manufacture a product with a package attached, and use this as it is.
It was transported to the bull laying site and laid in the trench.
So foam plastics in the cable tubing in a narrow trench
Easy to install without the need to attach the body
It can be speeded up.

[Brief description of the drawings]

[Fig. 1] Diagram showing underground cable pipeline

FIG. 2 is a diagram showing a first embodiment of the present invention.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a view showing another example of the cable tube holder.

FIG. 5: Foam plast covering the cable tube group of the device of the present invention
Perspective view

FIG. 6 is a cross-sectional view of one embodiment of the device of the present invention.

FIG. 7 is a partially broken front view of one embodiment of the device of the present invention .
Figure

[Explanation of Codes] 1: Upper surface of the cable pipe group 2: Left surface of the cable pipe group 3: Right surface of the cable pipe group 5: Recessed space on the upper surface 6: Recessed space on the left surface 7: On the right surface Recessed space 10: Tangent surface of adjacent cable tube surface 10-1: Tangent surface of adjacent cable tube surface on upper surface 10-2: Tangent surface of adjacent cable tube surface on left surface 10-3: Adjacent cable tube on right surface Surface tangential surface 11, 12, 13: Foamed resin filled portion 20 , 20a : Cable tube group covering foamed plastic body 21: Upper arrangement cable tube group covering foamed plastic body 21a: 21 upper half 21b: Below 21 Half part 22: Lower array cable tube group covering foam plastic body 22a: 22 upper half part 22b: 22 lower half part A: Cable tube group A1, A2, A3 , A4: Cable pipe B: Cable pipe holder E: Drill groove

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Added

[Correction contents]

[Figure 5]

[Procedure 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Added

[Correction contents]

FIG. 6

[Procedure amendment 4]

[Document name to be amended] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Added

[Correction contents]

FIG. 7

Continuation of front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area H02G 9/06

Claims (2)

[Claims] 1. A cable tube group covering a plurality of cable tube groups laid in the drilling groove, which is covered with a foamed plastic body, in the excavation groove for burying the cable tube underground. A method for preventing the outflow of sediment around an underground buried pipeline, which comprises constructing an underground buried cable pipeline by backfilling the soil in an excavation groove around the underground. 2. In an excavation trench for burying a cable pipe underground, in a hollow space between the cable pipes on at least the upper surface and both side surfaces of a plurality of cable pipe groups laid in the excavation trench. , A foamed resin material is sprayed to form a foamed resin filled part so that the surface is almost the same as the tangential surface of the surface of the adjacent cable pipe, and the soil is backfilled in the excavation trench around the cable pipe group to be buried underground. A method for preventing sediment outflow around an underground buried pipeline, which comprises constructing a cable pipeline.