JP3527655B2 - Underground buried structure of multistage pipeline and its burying method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents floating of a multi-stage pipe when casting a fluidized solidified product when the fluidized solidified product such as concrete is solidified around the multi-staged pipe and buried in the ground. The present invention relates to an underground burying structure of a multi-stage pipe and a method of burying it underground.

[0002]

2. Description of the Related Art In recent years, due to aesthetic problems, power lines,
Communication lines are often buried underground, and at that time,
Those wires are inserted into a protective tube such as FRP. The protection pipe is generally arranged in a plurality of rows and a plurality of stages, that is, is piped in the ground as a multi-stage conduit. The underground embedding of the multistage pipe is usually performed by constructing the multistage pipe in an excavation trench obtained by excavating the ground and backfilling with earth and sand.

However, at this time, if the ground is a light ground, a ground near a water field, an embankment ground, or an ultra-shallow burial, the ground subsidence is prevented and the strength against external pressure is increased by burying a multi-stage pipeline. Reinforce by solidifying the surroundings including the pipes of the multi-stage pipe with concrete, air mortar, fluidized solid such as fluidized soil. This reinforcement is used when constructing a multi-stage pipe in an underground channel such as an old unused canal that cannot be backfilled with earth and sand or a new shield, or when piping near a bridge girder. This is also done when there is not enough space on the ground and compaction cannot be performed when backfilling with earth and sand.

When the fluidized solidified product is reinforced by driving, it is necessary to prevent the multistage pipe line from rising due to the driving. Generally, the multistage pipe line mounting hole in the ground, for example, FIG.
First, a concrete base C is formed in the excavation groove U as shown in FIG. 3, a multi-stage pipeline A is formed on the base C, and the multi-stage pipeline A is fastened to the base C by various means to flow. Prevent the floating of the multi-stage conduit A due to the setting of the solidified product.

As a conventional means for preventing rising, as shown in FIG. 13, at the time of placing the concrete base C,
An anchor bolt t is erected on the reinforcing bar D by welding, and a pipe P is arranged on the anchor bolt t through a pipe pillow a in a required row and a required stage, and a pipe retainer is applied to the upper surface of the uppermost pipe row. In some cases, the multi-stage pipeline A is fixed to the base C by fastening the pipe retainer via a nut with an anchor bolt t (see the embodiment).

Also, as shown in FIG. 14, when placing a concrete base C, anchor hooks r are embedded and installed at required intervals in the lengthwise direction of the excavation groove U, and a pipe pillow a is mounted on the base C.
The pipes P are arrayed through the turnbuckle T on the upper surface of the pipe row.
In the case of passing the attached wire w and fastening both ends to the hook r to fasten it to fix the pipeline A to the base C, and to form multiple rows and multiple stages of pipelines on it. Is shown in FIG.
Similarly, the pipe pillow a is arranged and the pipe line A at the required stage is similarly provided.
The wire A is fastened to the wire A via the anchor hook r.

[0007]

According to the technique shown in FIG. 13, the reinforcing bar D is arranged on the concrete base C, and the reinforcing bar and the welding of the anchor bolt t are troublesome. Even without it, the base C having sufficient strength can be obtained.

Further, the anchor bolt t in that technique is used.
Has a predetermined height (constant number of stages) that constitutes the multi-stage pipeline A, so that its length (height) is all constant, for example, the pipeline A forms only one stage. Or when installing different types of pipes, such as water pipes (Fig. 1
0, the case of FIG. 11) or the number of steps different from the number of steps determined in advance (FIG. 9 or FIG. 10 with respect to FIG. 8), the anchor bolt t is short or long,
The piping work becomes troublesome. For example, although the anchor bolt t was provided to form the four-stage multi-stage conduit A, when the first-stage conduit A is to be tightened, the nut P is anchored by about 50 cm in order to fasten the first-stage pipe P. The bolt t must be screwed in, which is a very troublesome work.

In the technique shown in FIG. 14, since it is difficult to keep the pipes P in parallel depending on the wire w, there is a possibility that the pipe P may float up due to the pouring of the fluidized solidified material B (see FIG. 14C). For this reason, as shown in FIG. 15, the heights h of the first and second stages are not constant, and it is easy to cause inconvenience that the pipes of the second and subsequent stages are not smoothed. In addition, a new hook r is required for the second and subsequent stages.

Under the above-mentioned circumstances, the present invention surely prevents the multistage pipeline from being lifted, improves the workability of the underground buried pipe, and can smoothly cope with the configuration change of the upper pipeline. The task is to

[0011]

In order to solve the above-mentioned problems, the present invention firstly sets the length of the anchor bolts provided on the concrete base to the length of one-stage pipeline. This is because the conduit is formed in at least one stage.

Next, according to the present invention, the upper surface of the first-stage pipeline is used as the base surface of the pipeline formed above it, and the upper end of the anchor bolt is attached to the fastening portion of the fixture of the upper-stage pipeline. It was. In this way, it is possible to construct a free pipe line configuration after the second stage.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of the present invention, a concrete base is formed on the bottom surface of a hole formed in the ground, and an anchor bolt having a lower end embedded at the time of placing the concrete rises up on the concrete base to raise the anchor. The pipe retainer is inserted through the bolt, the pipe is positioned between the pipe retainer and the concrete base via a pipe pillow, and the nut is screwed into the tip of the anchor bolt, so that the pipe becomes a concrete base through the pipe retainer. It is fastened, various pipes are placed on the pipe retainer, the pipe is surrounded by a fitting, and the fitting is locked to the tip of the anchor bolt, and the upper pipe holds the anchor bolt. It is fixed to the concrete ground through the inside, the inside of the hole is backfilled with a fluidized solidified material such as concrete, and the periphery of the multistage pipe is solidified with the fluidized solidified material. The may be employed.

With this construction, the pipe is firmly supported by the pipe pillow and the pipe retainer, and the pipe is firmly fastened by tightening the nut of the anchor bolt, so that it is possible to reliably prevent the floating of the solidified product during casting.

In this structure, the concrete may be cast up to the first-stage pipe line at a time, but after forming the concrete base, the pipe and pipe pillow on the first stage are buried on the concrete base. If a concrete layer is formed and the concrete layer and the concrete foundation serve as a pipeline-forming foundation above that, the anchor bolts can be stably erected, and the concrete foundation in the lower stage It is also thin and can be smoothly formed as leveled concrete, and since the first-stage pipeline is formed on it, the first-stage pipeline reference is stable and the pipeline configuration above it is also stable.

The anchor bolt may be welded to the reinforcing bar D as in the conventional case, but if it is set up on a plate-like anchor base embedded in a concrete base, it can be mass-produced in a factory or the like and is inexpensive. Become.

The attachment includes a connecting nut screwed into the tip of the anchor bolt, a bolt rod screwed into the connecting nut, and a pipe retainer fastened to the tip end of the bolt rod through the nut. While connecting the bolt rod to the anchor bolt via the connecting nut, stacking the required number of pipes on the pipe retainer on the first stage pipe line via the pipe pillow, insert the pipe retainer into the upper end of the bolt rod, and insert It is possible to adopt a structure in which a pipe is applied to the upper surface of the upper stage and a nut is screwed and fastened to the upper end of the bolt rod.

With this structure, the pipe lines of the second and subsequent stages are also fastened with the surroundings in the form of a frame, and lifting can be more reliably prevented.

As another mode of the above-mentioned fitting, a fastening band and a nut for fastening the end of the fastening band to the upper end of the anchor bolt are provided, and a pipe pillow is provided on the pipe retainer on the first stage pipeline. A configuration in which a pipe is placed, the fastening band is wound around the pipe, both ends of the fastening band are inserted through the upper ends of the anchor bolts, and the nut is screwed on and fastened may be employed. This configuration is effective when fastening a single pipe such as a water and sewer pipe (see FIG. 11).

As a method of burying the above-mentioned multi-stage pipe in the ground, an anchor base with an anchor bolt raised is placed on the bottom of a hole formed in the ground, and the pipe is mounted on the anchor base via a pipe pillow. After placing it, insert the tube retainer into the anchor bolt, screw the nut onto the upper end of the anchor bolt, press the pipe retainer against the pipe to form the first-stage pipeline, and then place the concrete up to near the upper surface of the anchor stand. Placing, after solidifying the concrete layer, pouring concrete up to the pipe retainer to form a concrete base, placing various pipes on this concrete base, enclosing the pipe with a fixture, The end of the fixture is fastened to the upper end of the anchor bolt with a nut, the pipe is fastened, and then a fluidized solidified material such as concrete is poured into the hole and embedded to surround the multistage pipe line. It may employ a configuration in which harden in dynamic solidified.

As described above, when the concrete is poured after the first-stage pipeline is constructed, the anchor base does not move and can be stably fixed in place. In addition, by placing the first-stage concrete up to near the upper surface of the anchor base, the first-stage pipeline hardly rises, and the first-stage pipeline is stably fixed to the concrete layer. For this reason, it is possible to prevent the pipeline from rising when the second-stage concrete is placed.

In the above embodiment, each tube retainer can also be used as a tube pillow applied to the upper side of the tube. At this time, an anchor bolt insertion hole is formed in the tube pillow. If it is also used as described above, it is not necessary to separately manufacture the tube retainer. The fluidized solidified material is generally concrete, but various materials such as air mortar and fluidized soil can be adopted.

[0023]

EXAMPLE One example is shown in FIGS. 1 to 5, and in FIG.
The anchor metal fitting for forming the pipe line A ₁ of the first stage is shown. The anchor metal fitting 10 includes an anchor base 11 having a U-shaped cross section, anchor bolts 12 that are erected on both sides thereof by welding, and a pipe retainer 13 and a nut 14 that are inserted into the upper end of the anchor bolt 12. Figure 2 shows a tube pillow 1
The pipe pillow 15 shown in FIG. 5A is used as the lowermost stage or the uppermost stage, and the pipe pillow 16 shown in FIG. These tube pillows 15 and 16 support and fix the tube P by fitting a part of the tube P into the recess 17 in the length direction. The upper tube pillow 15 can also serve as the tube retainer 13.
At this time, the insertion holes 18 for the anchor bolts 12 are formed in the tube pillows 15, 16 as shown by the chain lines in the figure.

The anchor fitting 10 and the tube pillows 15 and 16
In order to configure the multi-stage pipeline A in the open cut groove U by using, the anchor metal fittings 10 are first placed on the bottom surface of the open cut groove U at appropriate intervals in the length direction as shown in FIG. 1
The pipe P is laid over the pipe 1 through the pipe pillow 15, and the pipe retainer 13 is placed on the pipe P and fastened with the nut 14. In this state, as shown in FIG. 4, leveling concrete is poured up to near the upper surface of the anchor base 11 to form the base C ₁ . Next, as shown in FIG. 5, after curing and solidifying the concrete C ₁ , the concrete is again poured up to near the pipe retainer 13 to form the base C ₂ having the pipe A ₁ . At this time,
Prevent the concrete from adhering to the upper male thread 12a of the anchor bolt 12.

After the base C having the first-stage conduit A ₁ is formed in this manner, as shown in FIG. 6, a nut 20 is screwed into the upper male thread 12a of the anchor bolt 11, and the nut 20 is bolted. The rod 21 is screwed in to make the anchor bolt a long one. At this time, the nut 20 may be welded to the bolt rod 21. When the bolt rod 21 rises, as shown in FIG. 7, the pipes P are stacked on the required number of stages A ₂ , A ₃ , and A ₄ via the pipe pillows 15 and 16, and the uppermost stage A ₄ thereof is stacked.
The tube retainer 13 is applied to and is fastened with the nut 14. The number of stages of this pipeline A is 2 stages A ₂ shown in FIG. 9 and FIG.
A ₃ , 4 stages A ₂ , A ₃ , A ₄ , A ₅ or more are optional.

When the multi-stage pipeline A is fastened by the bolt rods 21 and the like, concrete B is cast and the periphery of the multi-stage pipeline A is solidified with concrete as shown in FIG. The concrete may be cast to the ground surface, but the depth thereof is arbitrary, and the excavation groove U that is not filled by the concrete B is appropriately backfilled with earth and sand.

In this embodiment, the pipe P having the same diameter was used. However, as shown in FIG. 10, a pipe P'of a different type having a different diameter can be similarly used as the multistage pipe line A. In addition, FIG.
As shown in, the first-stage conduit A ₁ can also be the different diameter pipe P ′. Further, when a large diameter pipe such as a water pipe P ″ is installed side by side, as shown in FIG. 11, an anchor base 11, an anchor bolt 12, and a pipe retainer 13 having dimensions suitable for this are provided.
Of the anchor metal fittings 10, and the water and sewer pipe P ″ is placed on the anchor metal fittings 10 via the pipe pillow 30.
The pipe P ″ is wound around a fastening band 31 with a turnbuckle T, and both ends of the band 31 are fastened to the upper end 12a of the anchor bolt 12 with a nut 14 to be fastened.

If the anchor metal fitting 10 can be fixed in place by various other means without constructing the conduit A ₁ , as shown in FIG. 12, the anchor metal fitting before the conduit A ₁ is constructed. After the installation of 10, the concrete base C ₁ may be placed and thereafter the conduit A ₁ may be constructed. After that, the conduit A is constructed in the same manner as described above.

Although the embodiment has been described for the case of the excavation groove U, the present invention can be applied to a multi-stage conduit fixed with various fluidized solidified materials such as the above-mentioned underdrain. Further, from the viewpoint of strength, it is preferable that the lower stage including the first stage is a small-diameter conduit such as a power pipe.

[0030]

As described above, according to the present invention, it is possible to reliably prevent the floating and to flexibly respond to the change in the pipeline structure, and the underground burying work can be performed smoothly.

[Brief description of drawings]

FIG. 1 is a perspective view of an anchor metal fitting according to an embodiment.

FIG. 2 is a perspective view of the tube pillow of the same embodiment.

[Fig. 3] Construction explanatory diagram of the same embodiment

[Fig. 4] Construction explanatory diagram of the embodiment

[Fig. 5] Construction explanatory diagram of the embodiment

[Fig. 6] Construction explanatory diagram of the same embodiment

[FIG. 7] Construction explanatory diagram of the same embodiment

FIG. 8 is a construction explanatory view of the same embodiment.

[Fig. 9] Construction explanatory view of another embodiment

FIG. 10 is an explanatory view of construction of another embodiment.

FIG. 11 is a construction explanatory view of another embodiment.

FIG. 12 is a construction explanatory view of another embodiment.

FIG. 13 is a schematic perspective view of a conventional construction example.

FIG. 14 is an explanatory view of another conventional construction example.

FIG. 15 is an explanatory diagram of the same construction example.

[Explanation of symbols]

A ₁ , A ₂ , A ₃ , A ₄ , A ₅ Pipeline A Multi-stage pipeline B Concrete (fluidized solidified) C, C ₁ , C ₂ Foundation D Reinforcing bar P, P'pipe P "Water pipe T Turnbuckle U Cutting groove t Anchor bolt r Anchor hook w Wire 10 Anchor fitting 11 Anchor stand 12 Anchor bolt 12a Male screw part 13 Pipe retainer 14 Nuts 15, 16, 30 Pipe pillow 20 Nut 21 Bolt rod 31 Fastening band

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16L 1/024 H02G 1/06 H02G 9/06

Claims (6)

(57) [Claims] 1. A concrete base C ₁ is formed on the bottom surface of a hole U formed in the ground G, and an anchor bolt 12 having a lower end embedded therein rises when the concrete is placed on the concrete base C ₁ , and the anchor bolt 12 is attached to the anchor bolt 12. The pipe retainer 13 is inserted, and the pipe P is positioned between the pipe retainer and the concrete base C ₁ via the pipe pillow 15 so that the first stage
Are in line A ₁ is formed by narrowing twisting of the nut 14 to the distal end of the anchor bolt 12, the pipe P via the Kan'osae 13 are fastened to the concrete foundation C _1,
Furthermore, on the concrete base C ₁ , the first step
The concrete layer C ₂ is formed to the extent that the pipe P and the pipe pillow 15 of the pipeline A ₁ of FIG. ₂ are buried, and the concrete layer C ₂ and the concrete foundation C ₁ serve as the pipeline C for forming a pipeline above the concrete layer C _2. and which, in the pipe presser 13 is the tube P rests various pipe P is enclosed in the fixture, the fixture is engaged with the distal end of the anchor bolt 12, the upper pipe P
Is fixed to the concrete base C ₁ through the anchor bolts 12, and the fluidized solidified material B such as concrete is backfilled in the hole U so that the fluidized solidified material B around the multistage pipe A is
Underground structure of multi-stage pipelines that is solidified with. 2. The anchor bolt 12 is used as the attachment.
Nut 20 that is screwed into the tip of the bolt, bolt rod 21 that is screwed into the coupling nut 20, and bolt rod 2
A tube retainer 13 that is fastened to the tip portion of 1 via a nut 14.
And an anchor bolt 12 and a connecting nut 20.
The bolt rods 21 are connected via the pipe rods 15 and 16, and the pipe rods of the required number are stacked on the pipe retainers on the first-stage pipeline A ₁ through the pipe pillows 15 and 16. 2. The underground buried structure for a multi-stage pipeline according to claim 1, wherein the pipe is inserted into the uppermost pipe and applied to the upper surface of the uppermost pipe, and the nut 14 is screwed and fastened to the upper end of the bolt rod 21. 3. The fitting comprises a fastening band 31 and a nut 14 for fastening the end of the fastening band 31 to the upper end of the anchor bolt 12, and is mounted on the pipe retainer 13 on the first-stage pipeline A _1. The pipe P ″ is placed via the pipe pillow 30, the fastening band 31 is wound around the pipe P ″, and both ends of the fastening band 31 are inserted into the upper ends of the anchor bolts 12 and nuts are mounted thereon. 14. The underground buried structure for a multi-stage pipeline according to claim 1 or 2, wherein 14 is screwed and fastened. 4. An anchor base 11 on which an anchor bolt 12 is raised is placed on the bottom surface of a hole U formed in the ground G, and a pipe P is placed on the anchor base 11 via a pipe pillow 15, Insert the tube retainer 13 through the anchor bolt 12,
The nut 14 is screwed into the upper end 12a of the anchor bolt to press the pipe retainer 13 against the pipe P to form the first-stage pipeline A ₁ , and then concrete is poured up to near the upper surface of the anchor base 11, and the concrete layer After solidification of C ₁ , concrete is cast up to the pipe retainer and the concrete base C
₂ to form various pipes P on this concrete base C _2.
Is placed, the pipe P is surrounded by a fixture, and the end of the fixture is nut-fastened to the upper end 12a of the anchor bolt 12 to fasten each pipe P, and then the concrete is placed in the hole U. A method for burying a multi-stage pipeline in the ground by pouring a fluidized solidified product B such as the above, and solidifying around the multi-stage pipeline A with the fluidized solidified product B. 5. The anchor bolt 12 is used as the attachment.
And a bolt rod 21 screwed into the fastening nut 20, and the bolt rod 21.
And a bolt 13 which is fastened to the tip end of the anchor bolt via a nut 14, and a bolt rod 21 is connected to the anchor bolt 12 via a connecting nut 20.
_The required number of stages of pipes P are stacked on ₁ through the pipe pillows 15 and 16, and the pipe retainer is inserted through the upper end of the bolt rod 21 and applied to the upper face of the uppermost pipe, and the nut 14 is screwed onto the upper end of the bolt rod 21. The method according to claim 4 , wherein the multistage pipe is buried underground. 6. The fitting comprises a fastening band 31 and a nut 14 for fastening the end of the fastening band 31 to the upper end of the anchor bolt 12, and the pipe is mounted on the pipe retainer on the first-stage pipeline A _1. The pipe P ″ is placed via the pillow 30, the fastening band 31 is wound around the pipe P ″, both ends of the fastening band 31 are inserted into the upper ends of the anchor bolts 12, and the nut 14 is placed thereon. The method of embedding a multi-stage pipeline in the ground according to claim 4 or 5 , wherein the method is screwed and fastened.