JPH07293748A - Laying construction method for pipe body - Google Patents

Abstract

PURPOSE:To reduce manhours required for reexcavation in laying a pipe body through reexcavating a road, etc., temporarily recovered. CONSTITUTION:A road, etc., temporarily recovered is excavated until a backfilling material U previously buried appears, and then the exposed backfilling material U is removed. Then the road, etc., is excavated so as to be continued to a pipe body P buried previously so as to form a groove, and also a new pipe body P is buried in the groove to be connected in order to the pipe body P buried previously. When the laying connection of the pipe body P is finished, the backfilling material U is installed at the position of the pipe inlet of the pipe body P in a tip, and then backfilling sand S is charged in the excavated groove to bury the backfilling material U together with the pipe body P to temporarily recover the road, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe laying method.

[0002]

2. Description of the Related Art Conventionally, a pipe, for example, a distribution pipe is buried in a roadway or a sidewalk (hereinafter referred to as a road) to form the pipe line in the ground. This distribution pipe laying work includes, in one construction section, preparatory work for exposing the tip of the distribution pipe at the tip laid in the preceding construction section,
It is mainly composed of piping work to lay and connect a new power distribution pipe after the exposed power distribution pipe, and pavement temporary restoration work to construct asphalt so that vehicles can pass through it.
The pipeline is extended by repeating this series of constructions in the adjacent construction sections.

Of these, the concrete contents of the preparatory work are, as shown in FIG. 4, temporary restoration of pavement such as asphalt using the excavating machine B in the vicinity of the pipe mouth of the distribution pipe P at the tip laid previously. A mechanical excavation step of excavating backfilling sand S such as river sand or mountain sand in which the part A and the distribution pipe P are buried to a predetermined depth, and the distribution pipe P is manually dug by an operator as shown in FIG. Of the backfill sand S for digging backfill sand S until it is exposed, and a pipe mouth cleaning process for removing and cleaning the backfill sand S that has entered the distribution pipe P. In addition, the concrete contents of the piping work should be continuous with the distribution pipe P exposed by the above-mentioned preparatory work.
A machine excavation process for excavating a road or the like using the excavation machine B to form a groove having a constant depth over a predetermined length, a piping process for laying and connecting a new distribution pipe P to the groove, and a excavation groove. It is composed of a backfilling process in which sand S for backfilling is charged to bury the distribution pipe P.

[0004]

By the way, in such laying work, the working time per day tends to be restricted in consideration of traffic conditions. However, even if the working time per day is regulated, the man-hours required for re-excavation for exposing the pipe mouth of the previously-distributed tip of the distribution pipe do not change. There is a problem that the length of the pipeline that can be laid per day is reduced and the construction period is extended. For this reason, it is conceivable to excavate the machine instead of hand digging by a worker who occupies a large part of the preparatory work.However, the distribution pipe is weak against impact, and the distribution pipe may be damaged if the cutting edge of the excavating machine hits. Therefore, not all re-drilling can be converted to mechanical drilling.

Further, since the excavated earth and sand are released from the compaction state before excavation and contain impurities, the excavated earth and sand cannot be backfilled as they are and must be discarded as a construction by-product. is there. For this reason, the above-mentioned backfilling sand has been added to backfill the groove after the distribution pipe has been laid.However, when the backfilling sand that has been input near the pipe mouth of the tip of the distribution pipe is re-excavated. The problem is that the backfill sand mixes with the surrounding bad soil containing impurities, and as a result, it must be disposed of as a construction by-product, which not only adds to the cost but also contributes to the deterioration of the environment. There was also.

The present invention has been made in view of the above problems, and when the pipe body is laid by re-digging a temporarily restored road or the like, the man-hour required for the re-digging is reduced as much as possible. It is intended to provide a pipe laying method that can be reduced in number.

[0007]

DISCLOSURE OF THE INVENTION According to the present invention, a groove is formed by excavating a road or the like, a pipe is laid in the groove and sequentially connected, and backfilling sand is put into the groove to form the pipe. Perform a series of work for burying and temporarily restoring the pavement of roads, etc. for one construction section, and then repeat the above-mentioned series of work in the adjacent construction section in order to extend the pipeline of the pipe body. The laying method is characterized in that a block-shaped backfill material having pressure resistance is installed and buried along the pipe mouth of the pipe body at the tip of each construction section, and temporary restoration is performed.

[0008]

[Operation] Excavating the temporarily restored road or the like until the backfilling material buried earlier appears, and the exposed backfilling material is removed. Then, a road or the like is excavated so as to be continuous with the previously buried pipe body, a groove is formed, and a new pipe body is laid in the groove and sequentially connected. Then, after the backfill material is installed along the pipe mouth of the pipe body at the tip, the backfill material is buried in the excavated trench by burying the backfill material together with the pipe body to temporarily restore the road or the like.

As a result, the number of man-hours required for re-excavation in the preparatory work is greatly reduced, and the excavation distance per day, that is, the laying length of the pipe body can be increased, and the total construction period can be shortened. be able to. Furthermore, the amount of sand corresponding to the backfill material is not required, and the amount of construction by-products emitted can be reduced by that much, which can improve the environmental problem and reduce the cost.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the vicinity of the mouth of a power distribution pipe P at the tip buried in a road or the like in one construction section.
Block-shaped backfill material U along the pipe mouth of the distribution pipe P
Is installed. The backfill material U is formed of a steel material having a plate thickness capable of withstanding earth pressure and live load when buried, and is formed into a tapered box body whose area gradually decreases from the top surface to the bottom surface. And the backfill material U
At the top of the ring, a plurality of rings R with a round bar bent in a U shape
Is attached.

As a result, the buried backfill material U can be easily pulled up, and by attaching a wire (not shown) to the ring R, the excavating machine B or the like can be used for lifting.

Further, a sealing material K having an L-shaped cross section is attached to a pipe mouth of the power distribution pipe P. By interposing the sealing material K at the pipe mouth of the power distribution pipe P, the inside of the power distribution pipe P is It is possible to suppress the backfilling sand S that invades into the pipe and reduce the number of steps required for cleaning the pipe mouth.

The backfill material U in this embodiment is
Was made of steel so that it can be used repeatedly, but it may be made of foamed plastic in a box shape. When the foamed plastic is used to form a box like this, there is an advantage that the weight can be significantly reduced and the operator can easily carry it. However, in order to prevent the ridge from being worn away, it is necessary to surround the ridge with a steel material frame having an L-shaped cross section so as to withstand repeated use.

Further, the backfill material U can be formed by using a metal material other than steel material or a non-metal material such as concrete, FRP or wood. Among them, the backfill material U made of concrete has some advantages in that it can be manufactured at low cost, although it has some difficulties in handling.

Therefore, in order to lay a new distribution pipe P following the distribution pipe P laid in the preceding construction section, as shown in FIG. 2, fill in the vicinity of the mouth of the distribution pipe P laid earlier. Machine excavation is performed using the excavating machine B until the return material U appears. Then, if the backfill material U appears, FIG.
As shown in, the wire is attached to the ring R, the backfill material U is lifted by the excavating machine B and removed, and the pipe port of the distribution pipe P is exposed. Next, the sealing material K attached to the pipe mouth of the distribution pipe P is removed, and then the exposed distribution pipe P is excavated on the road or the like by using the excavation machine B, and a groove having a predetermined depth is formed. To form over. After that, the power distribution pipe P is laid in the excavation groove and is connected to the power distribution pipe P laid earlier. When the laying of the distribution pipe P is completed, the sealing material K is attached to the pipe mouth of the distribution pipe P at the tip thereof, and the backfilling material U is installed along the sealing material K. Then, the backfilling sand S is put into the excavation trench, the backfilling material U is buried together with the power distribution pipe P, and the paving temporary restoration part A such as asphalt is formed on the backfilling material U, and the road is protected so as not to hinder traffic. Temporarily recover the above.

As a result, in the preparatory work, the hand digging work of the conventional worker can be replaced with the removal of the backfill material,
The working time can be greatly reduced. Since the reduced man-hours can be used for the plumbing work, it is possible to increase the length of the pipeline laid in one day and also shorten the total construction period. Moreover, by using the backfilling material U, it is possible to reduce the use of the backfilling sand S corresponding to the volume thereof, and at the same time, reduce the man-hours required for loading the sand, thereby significantly reducing the cost as a whole. it can. further,
By mounting the sealing material S on the pipe mouth of the power distribution pipe P, it is possible to suppress the infiltration of the backfilling sand S into the inside thereof.

In this embodiment, the case where the conduit of the power distribution pipe P is formed has been described, but other pipes,
For example, it can be used to form a pipeline by burying a gas pipe, a sewage and tap water pipe, a communication pipe, and a collection pipe thereof, and other than laying a pipe body, it can be used temporarily. It can also be applied when re-excavating a road that has been temporarily restored.

In addition, the distribution pipe P of this embodiment uses a plurality of backfill materials U having different sizes because the distribution pipe P is illustrated as a two-tiered stack.
The size and number of the backfill material U may be determined according to the pipe diameter and shape, and further the burial depth.

Further, when the distribution pipes P are stacked in a plurality of stages, the lower side of the sealing material K attached to the mouth of the distribution pipe P in the upper stage is extended forward, and the backfill material U is placed thereon. By doing so (see FIG. 1), it is possible to mitigate the effects of stress concentration due to the backfilling material U on the lower distribution pipe P, and as a result, to protect the distribution pipe P while sealing the pipe mouth of the distribution pipe P. be able to.

[0021]

As described above, according to the present invention, a block-shaped backfill material having pressure resistance is installed along the pipe mouth of the tip pipe body in each construction section to be buried and temporarily restored. As a result, the number of man-hours required for re-excavation in the preparatory work can be significantly reduced, and the excavation distance per day, that is, the laying length of the pipe body can be increased, and the total construction period can be shortened. As a result, a backfilling sand having a capacity equivalent to that of the backfilling material is not required, and the cost can be reduced, and the emission amount of construction by-products can be reduced to improve environmental problems.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the vicinity of a pipe mouth of a pipe body laid according to the present invention.

FIG. 2 is an explanatory view showing a preparation step when laying a pipe body according to the present invention.

FIG. 3 is an explanatory view showing a preparation step when laying a pipe body according to the present invention.

FIG. 4 is an explanatory diagram showing a preparation process when laying a conventional pipe body.

FIG. 5 is an explanatory view showing a preparation step when laying a conventional pipe body.

[Explanation of symbols]

 U Backfill material K Seal material P Distribution pipe (tube) S Backfill sand A Pavement temporary restoration section (asphalt) B Excavator

Front page continuation (72) Inventor Osamu Iwamoto 3-3-22 Nakanoshima, Kita-ku, Osaka City Kansai Electric Power Co., Inc. (72) Masahiro Yamamoto 3-3.22 Nakanoshima, Kita-ku, Osaka City Kansai Electric Power Co., Ltd. (72) Inventor Hiro Kikuchi 3-3-22 Nakanoshima, Kita-ku, Osaka Kansai Denryoku Co., Ltd. (72) Inventor Hiroshi Uejima 2-3-4, Honjo Higashi, Kita-ku, Osaka Kinden Co., Ltd. Within

Claims (3)

[Claims] 1. A road or the like is excavated to form a groove, a pipe is laid in the groove and sequentially connected, sand for backfilling is poured into the groove to bury the pipe, and the road is paved temporarily. Perform a series of work to restore for one construction section, and then repeat the above-mentioned series of work in adjacent construction sections to extend the pipe path of the pipe body. A method of laying a pipe, wherein a block-shaped backfill material having pressure resistance is installed and buried along the pipe mouth of the tip pipe to temporarily restore the pipe. 2. The pipe laying method according to claim 1, wherein the backfill material is formed into a tapered box body whose area gradually decreases from the top surface to the bottom surface. 3. The pipe laying method according to claim 1, wherein a sealing material for preventing infiltration of earth and sand is attached to the pipe mouth of the pipe body at the tip of each construction section.