JP2019112916A - Protection method of buried pipe and protection structure - Google Patents

Abstract

To provide a buried pipe protection method capable of preventing the buried pipe from deforming after completion of protection work by preventing a part with no connecting member on a side plate from expanding outward, or preventing a lower portion of side plate from expanding outward after putting in burying soil and rolling the same with rammer, etc. in a process of covering the tube with protective material.SOLUTION: In the process of backfilling with buried soil, buried pipes are prevented from being flattened due to compaction of the buried soil by arranging side plates 3 which are installed to face the pipeline to expand outward by compaction of the backfill soil.SELECTED DRAWING: Figure 5

Description

  In the present invention, when the pipe is buried in the ground, at the same time as the embedding of the pipe, the protective plate along the axial direction of the pipe on the upper surface and the side of the pipe in order to appropriately prevent the underground pipe from being damaged by the drilling equipment. Protection method and protective structure covering the

  Water pipes, gas pipes, power cable pipes, etc. are buried in the ground. In recent years, in view of durability and workability, the pipe material has been changed from metal to plastic. However, plastic pipes may damage or damage pipes laid in the ground during drilling work such as backhoe or tsuruhashi by other construction work.

  In order to prevent the damage at the time of such excavation, the burial indication which shows that the pipe is laid, the technology which prevents the damage at the time of the excavation of the pipe by installing the protection board above the laid pipe, Techniques for installing guard plates on the top and sides of

  In Patent Document 1, a portal frame is arranged at intervals in the axial direction so as to cover the buried pipe in the digging groove, and after securing the side protection plates vertically on both sides of the frame, the digging groove is formed. There is described a method of protecting the buried pipe by backfilling with soil, backfilling to the upper end of the frame, and then arranging the top protective plate horizontally and injecting the backfilled soil thereon.

  In Non-Patent Document 1, a protective side plate fixed by a connecting member is disposed at a fixed distance in the axial direction of the buried pipe, and the back ground is inserted and rolled up to the upper surface of the protective material by a rammer or the like. A method of protecting the buried pipe by placing a top protection plate horizontally later and injecting backfill soil thereon is disclosed.

JP 2001-311131 A

Doi Manufacturing Co., Ltd. "Protection material for buried objects" [online] [Search on November 22, 2017] Doi Manufacturing Co., Ltd. Internet <URL: http: // www. doi-web. com / product / undergrounding / post-15. php〉

  The prior art in Patent Document 1 describes a method of protecting a buried pipe with a side protection plate and a top protection plate made of steel plate, but the protection plate is made of steel plate, the merit is strength, and processing and bolts Although tightening etc. can be performed easily, corrosion etc. can be considered after many years of use. As a result, it is presumed that the role of the protective plate is lost.

  In the protective structure of the prior art in Non-Patent Document 1, in the process of covering the pipe with the protective material, when the buried soil is put and the rolling is performed by a rammer or the like, the rolling pressure becomes uneven. Thus, it is assumed that the side plate of the portion without the connecting member spreads out in a bow shape, or the lower portion of the side plate spreads outward because there is no connecting member at the lower portion of the side plate. As a result, backfilling around the pipe becomes uneven, and there is a concern that the pipe may be deformed after the completion of implantation.

  Therefore, the subject of the present invention is that in the step of covering the pipe with a protective material, after the buried soil is put in and compacted by a rammer etc, the part without the connecting member of the side plate spreads outward or the lower portion of the side plate spreads outward To prevent the deformation of the buried pipe after the completion of the protection work.

  The subject of the invention includes underground pipes, such as water pipes, gas pipes, electric power communication pipes, cable protective pipes, etc., and pipes such as vinyl chloride pipes and polyethylene pipes, etc. It is a tube made of resin. In the method of protecting a buried pipe according to the present invention, since the protection of the pipe is simultaneously performed at the time of laying the pipe, complete protection work can be performed without difficulty unlike the method of protecting after pipe laying.

In the invention of claim 1,
After installing the side panels for protection, when the whole soil is filled with soil and the back ground is compacted to the height of the side panels with a rammer etc., when the side panels are forced to spread by the buried soil, Technical measures are taken such that the side plates are spread out.

In the invention of claim 2,
In the special self-supporting beam for fixing the side plate disposed so as to face the tube at a certain distance from the pipe with the pipe at the center, the fixed portion of the special self-supporting beam with the side plate is embedded with the side plate When a force that spreads due to the compaction of the return soil is applied, we have taken technical measures to make it spread.

In the invention of claim 3,
The special self-supporting beams fixed to the side plates installed at regular intervals from both sides of the pipe are the special self-supporting beams when a force is applied such that the side plates expand due to the consolidation of the backfill soil. It has taken technical measures to make it grow.

  When backfilling the entire digging groove, the protective side plate is designed to expand, as a result, the buried soil around the pipe is uniformly backfilled, and the pipe becomes flat after completion of the protection work There is no

The figure which shows one Example of this invention A-A arrow view of FIG. 1 from the side of one embodiment of the present invention Figure backfilled with backfill soil The figure which shows the state where the side plate does not spread where there is a beam for self-supporting The figure which shows the spread state of the side plate in the place without the beam for self-supporting A view from the top of FIGS. 4 and 5 Fig. 4 is a diagram showing the situation when the backfill soil is further compacted Special self-supporting beam set with the side plate spread out The figure which shows the state which the side plate spreads by the beam for special self-supporting Figure showing top plate placed on side plate and backfilled with backfill soil Figure showing an example of a special free standing beam Figure showing an example of a special free standing beam Figure showing another embodiment of special free standing beam Figure showing an example of a special freestanding beam extending

  Hereinafter, a protection method and protection structure at the time of embedding of a pipe according to the present invention will be described with reference to the drawings.

An example of the present invention will be described with reference to FIG.
The buried pipe 2 is placed on the tube floor 1 of the digging groove, and then the side plate 3 for protection is installed. The self-supporting beam 4 is set on the side plate 3 so that the two side plates 3 can face each other at a fixed distance with the pipe 1 to be embedded at the center. The AA arrow line view is shown by FIG.

  FIG. 3 shows a situation in which the buried soil 5 is covered in the digging groove.

  FIG. 4 shows a situation in which, when the buried soil 5 is compacted, the area around the pipe can be sufficiently compacted, but outside the side plate 3 where the self-supporting beam 4 is located, an insufficiently compacted area can be created. .

  In FIG. 5, when the embedded soil is compacted in a place without the self-supporting beam 4, the side plate 3 spreads and the compaction becomes sufficient also around the pipe and outside the side plate 3.

  It is FIG. 6 which looked at the condition of FIG. 4 and FIG. 5 from the top, and the place where the side plate 3 spreads in the shape of a bow is made. It can be clearly seen that the side plate 3 is not spread where the freestanding beam 4 is located.

  In FIG. 7, when the upper plate 6 is placed on the side plate 3 and the back ground 7 is inserted and compacted in the state of FIG. 4, the upper part of the side plate 3 does not expand because the supporting beam 4 is present. However, it is assumed that the lower part of the side plate 3 spreads out and the buried pipe 2 becomes flat.

  FIG. 8 is a view showing an assembled state in which the side plate 3 attached to the special self-supporting beam 8 is expanded when a force to expand the side plate 3 acts.

  FIG. 9 shows a situation in which the side plate 3 spreads and the repacked soil is uniformly compacted when the repacked soil is compacted.

  FIG. 10 shows a state in which a protection structure is formed by covering the backfill soil 7 in the situation of FIG. In this state, the entire side plate 3 is uniformly compacted by the backfill soil 7 even in places where there is no special self-supporting beam in the side plate 3, and the buried pipe 2 is not flattened.

  FIG. 11 shows the structure of the special self-supporting beam type (a) 9. The shape of the B part enlarged view is a feature.

  FIG. 12 shows an example in which the special self-supporting beam type (a) 9 is attached to the side plate 3. Push the special self-supporting beam (a) type 9 into the notch of the side plate 3 from above and set it. When the side plate 3 tries to widen, the side plate 3 is spread beyond the sawtooth.

  FIG. 13 shows an example of a special self-supporting beam type (b) 10 having a tip with a slightly larger outer diameter at the tip. When the side plate 3 tries to widen, it moves toward the large outer diameter and the side plate 3 spreads. Many other shapes are conceivable. These are an example.

  FIG. 14 shows an example of the extending special self-supporting beam 11, and when the side plate tries to widen, the extending special self-supporting beam 11 extends. This spreads the side plate. A structure that does not spread with weak force is desirable.

  The self-supporting beam is preferably made of plastic and durable. It is desirable to use a material that is buried and does not adversely affect the underground underground pipe permanently.

DESCRIPTION OF SYMBOLS 1 Tube floor 2 Buried pipe 3 Side plate 4 Beam for standing-up 5 Buried soil 6 Upper plate 7 Reclaimed soil 8 Beam for special self-supporting 9 Beam type for special self-supporting (a)
10 Special Freestanding Beam Type (b)
11 Extending special self-supporting beams

Claims (3)

  When a pipe is embedded in a digging groove, two protective side plates are arranged to face each other with a certain distance from the pipe with the pipe at the center, and the digging groove is backfilled with soil, the side plate In the method of setting the upper surface protection plate on the side plate after compacting the buried soil to the height of the above, the entire digging groove is filled with the soil, and when the soil is compacted, the side plate is in the center A method of protecting a buried pipe characterized in that the pipe extends outward with respect to the pipe.   In the protective structure used in the method of protecting a buried pipe according to claim 1, the attachment portion between the two arranged side plates and the supporting beam for fixing the side plates is made of the compacted backfill soil. A protective structure characterized in that it is a special self-supporting beam devised so that the side plate spreads outward by force.   In Claim 2, the self-supporting beam for fixing the two side plates is structured so as to extend the special self-supporting beam so that the side plates can spread outward by the consolidation of the backfill soil. Characteristic protective structure.

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