JP3495412B2 - Pipe laying method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe laying method. 2. Description of the Related Art Conventionally, a pipe, for example, a power distribution pipe has been buried in a road or a sidewalk (hereinafter referred to as a road) to form a pipe in the ground. This distribution pipe laying work includes, in one construction section, preparation work for exposing the tip of the tip of the distribution pipe laid in the preceding construction section,
It mainly consists of plumbing work to lay and connect a new distribution pipe following the exposed distribution pipe, and temporary pavement restoration work to construct asphalt so that vehicles etc. can pass,
The pipeline is extended by sequentially repeating this series of works in adjacent work sections. [0003] The concrete contents of the preparatory work are, as shown in FIG. 4, as shown in FIG. Mechanical excavation step of excavating backfill sand S such as river sand or mountain sand burying the portion A and the distribution pipe P to a predetermined depth, and as shown in FIG. And a pipe mouth cleaning step of digging the backfill sand S until the pipe mouth is exposed, and a pipe mouth cleaning step of removing and cleaning the backfill sand S that has entered the inside of the distribution tube P. Also, the specific contents of the plumbing work should be continuous with the distribution pipe P exposed by the above-mentioned preparation work.
Excavating a road or the like by using an excavating machine B to form a groove having a constant depth over a predetermined length, a piping step of laying and connecting a new distribution pipe P to the groove, It comprises a backfilling step of charging the backfill sand S and burying the distribution tube P. [0004] By the way, in such laying work, the working time per day tends to be regulated in consideration of traffic conditions. However, even if the working time per day is regulated, the man-hour required for re-digging to expose the mouth of the distribution pipe at the tip of the previously buried tip does not change. Thus, there is a problem that the length of the pipeline that can be laid in one day is reduced and the construction period is prolonged. For this reason, it is conceivable that mechanical excavation may be performed instead of manual excavation by workers who occupy a large specific gravity during the preparatory work.However, the distribution pipe is vulnerable to impact, and the distribution pipe may be damaged if the cutting edge of the drilling machine hits it. For some reason, not all re-digging can be converted to mechanical drilling. In addition, excavated earth and sand is released from the consolidation state before excavation and contains impurities, so that the excavated earth and sand cannot be backfilled as it is and must be discarded as a construction by-product. is there. For this reason, in order to backfill the trench after laying the distribution tube, the above-mentioned backfill sand is injected, but when the backfill sand injected near the mouth of the distribution tube at the tip is re-excavated As a result, the sand for backfilling must be disposed of as a by-product of construction as a result of being mixed with the surrounding defective soil containing impurities, which not only increases costs but also contributes to the deterioration of the environment. There was also. SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and when laying a pipe by re-excavating a temporarily restored road or the like, the man-hour required for re-excavation is reduced as much as possible. It is intended to provide a pipe laying method which can be reduced. According to the present invention, a groove is formed by excavating a road or the like, a pipe is laid in the groove and connected sequentially, and sand for backfilling is introduced into the groove. A series of work for burying the pipe and temporarily paving the road etc. is performed for one construction section, and the above-mentioned series of work is sequentially repeated in the adjacent construction section to extend the pipe of the pipe. In the pipe laying method, after installing a sealing material for preventing intrusion of sediment at the mouth of the leading end of the pipe in each construction section, and having pressure resistance along the sealing material for preventing intrusion of soil, from the top surface to the bottom surface The present invention is characterized in that a block-shaped back-up material formed in a tapered box whose area gradually decreases is installed, buried, and temporarily restored. The temporarily restored roads and the like are excavated until the backfill material buried earlier appears, and the exposed backfill material and the sealing material for preventing intrusion of earth and sand are removed. At this time, since the block-shaped backfill material is formed in a tapered box whose area gradually decreases from the top surface to the bottom surface,
It can be easily pulled up, and since the sealing material for preventing intrusion of earth and sand is attached to the mouth of the tube, sand for backfill that intrudes into the inside of the tube can be suppressed, which is required for cleaning the mouth of the tube. Man-hours can be reduced. Next, a groove is formed by excavating a road or the like so as to be continuous with the previously buried pipe, and a new pipe is laid in the groove and connected sequentially. Then, after attaching the sealing material for preventing intrusion of earth and sand to the mouth of the pipe at the tip, a backfill material is installed along the sealing material for preventing intrusion of soil and sand, and the sand for backfilling is introduced into the excavated groove, and the pipe is filled. The backfill material is buried together with the body, and roads are temporarily restored. As a result, the number of man-hours required for re-excavation in the preparatory work is significantly reduced, and the excavation distance per day, that is, the length of laying of the pipe can be increased, thereby shortening the total construction period. be able to. Further, the amount of sand equivalent to the backfill material is not required, so that the amount of construction by-products can be reduced, environmental problems can be improved, and costs can be reduced. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the vicinity of a mouth of a distribution pipe P at a tip buried in a road or the like in one construction section.
A block-shaped backfill material U is provided along the opening of the distribution tube P.
Is installed. The backfill material U is formed of a steel material having a thickness that can withstand the earth pressure and live load when the backfill material is buried, and is formed in a tapered box body whose area gradually decreases from the top surface to the bottom surface. And backfill material U
In the upper part of the ring, a plurality of rings R formed by bending a round bar into a U shape
Is attached. As a result, the buried backfill material U can be easily pulled up, and can be lifted by using a drilling machine B or the like by attaching a wire (not shown) to the ring R. Further, a sealing material K having an L-shaped cross section is attached to the mouth of the distribution tube P, and the sealing material K is interposed in the mouth of the distribution tube P to thereby form the inside of the distribution tube P. The sand S for backfill which invades the inside can be suppressed, and the man-hour required for pipe opening cleaning can be reduced. The backfill material U in this embodiment
Is formed using a steel material so that it can be used repeatedly, but may be formed in a box shape using foamed plastic. When formed into a box shape using foamed plastic as described above, the weight can be significantly reduced, and there is an advantage that it can be easily carried by an operator. However, in order to prevent the abrasion of the ridge, 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, or a nonmetal material such as concrete, FRP, or wood. Among them, the backfill material U made of concrete has an advantage that it can be manufactured at low cost, though there are some difficulties in handling. Therefore, in order to lay a new power distribution pipe P following the power distribution pipe P laid in the preceding construction section, as shown in FIG. Machine excavation is performed using the excavating machine B until the return material U appears. Then, when the backfill material U appears, FIG.
As shown in (1), a wire is attached to the ring R, and the backfill material U is lifted and removed by the excavating machine B to expose the opening of the distribution tube P. Next, the sealing material K attached to the outlet of the distribution pipe P is removed, and then, following the exposed distribution pipe P, a road or the like is excavated using the excavating machine B, and a groove having a predetermined depth is formed by a predetermined length. Formed over Thereafter, the distribution pipes P are laid in the excavation trenches, and are sequentially connected to the distribution pipes P laid earlier. When the installation of the distribution tube P is completed, the sealing material K is attached to the end of the distribution tube P at the tip thereof, and the backfill material U is installed along the sealing material K. Then, sand S for backfilling is put into the excavation trench, and after backfilling material U is buried together with the distribution pipe P, a temporary pavement restoring part A such as asphalt is formed thereon, so that the traffic is not hindered. What should be done is temporary restoration. As a result, in the preparatory work, the manual digging work of the conventional worker can be replaced with the removal of the backfill material.
Work time can be greatly reduced. And since the reduced man-hour can be diverted to the plumbing work, the length of the pipeline laid in one day can be increased, and the total construction period can be shortened. In addition, by using the backfill material U, it is possible to reduce the use of the backfill sand S corresponding to the volume thereof, and at the same time, to reduce the number of steps required for putting the sand therein, thereby greatly reducing the cost as a whole. it can. further,
By attaching the sealing material S to the opening of the distribution tube P, the penetration of the backfill sand S into the inside thereof can be suppressed. In this embodiment, the case where the conduit of the distribution tube P is formed has been described.
For example, it can be used for burying gas pipes, water pipes for sewage and clean water, communication pipes and their collective pipes, etc. to form pipelines. The present invention can also be applied to the case where a temporarily restored road or the like is re-excavated. Further, the distribution tube P of the present embodiment uses a plurality of backfill materials U of different sizes by exemplifying the distribution tube P in a two-stage stacking.
The size and number of the backfill material U may be determined according to the tube diameter and shape, and further, the burial depth and the like. Further, when the distribution tubes P are stacked in a plurality of stages, the lower side of the sealing material K attached to the mouth of the upper distribution tube P is extended forward, and the backfill material U is placed thereon. By doing so (see FIG. 1), it is possible to alleviate the influence of stress concentration and the like caused by the backfill material U on the lower distribution tube P, and as a result, to seal the opening of the distribution tube P and protect the distribution tube P. be able to. As described above, according to the present invention, the sealing material for preventing intrusion of earth and sand is attached to the mouth of the pipe at the tip end in each construction section, while the sealing material for preventing intrusion of earth and sand is attached. By installing and embedding a block-shaped back-up material formed in a tapered box whose area gradually decreases from the top surface to the bottom surface while having pressure resistance, and temporarily recovering it,
The number of man-hours required for re-excavation in the preparatory work has been significantly reduced, and the excavation distance per day, that is, the length of pipe laying, can be increased, and the total construction period can be shortened. This eliminates the need for backfilling sand having a capacity equivalent to the reclaimed material, thereby reducing costs and reducing the amount of construction by-products emitted, thereby improving environmental problems.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing the vicinity of a mouth of a pipe laid according to the present invention. FIG. 2 is an explanatory diagram showing a preparation process when laying a pipe according to the present invention. FIG. 3 is an explanatory view showing a preparation step when laying a pipe according to the present invention. FIG. 4 is an explanatory view showing a preparation step when laying a conventional pipe body. FIG. 5 is an explanatory view showing a preparation step when laying a conventional pipe body. [Description of Signs] U Backfilling Material K Sealing Material P Distribution Tube (Tube) S Sand for Backfilling A Temporary Paving Restoration Section (Asphalt) B Excavating Machine

────────────────────────────────────────────────── ─── Continuing on the front page (72) Osamu Iwamoto, Inventor 3-3-22 Nakanoshima, Kita-ku, Osaka Kansai Electric Power Co., Inc. (72) Inventor Masahiro Yamamoto 3-2-2, Nakanoshima, Kita-ku, Osaka Kansai Hiroshi Kikuchi (72) Inventor Hiroshi Kikuchi 3-3-22 Nakanoshima, Kita-ku, Osaka-shi Kansai Electric Power Company (72) Inventor Hiroshi Uejima 2-41, Honjohigashi, Kita-ku, Osaka Kindenchi Co., Ltd. (56) References JP-A-58-127833 (JP, A) JP-A-60-226908 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 1/024 E01C 9 / 08

Claims (1)

(57) [Claims] [Claim 1] Excavating a road or the like to form a groove, laying a pipe in the groove, sequentially connecting the pipes, and putting backfill sand into the groove to form a pipe. A series of work to bury the building and temporarily restore the pavement of roads, etc. is performed for one construction section, and then the above-described series of work is sequentially repeated in an adjacent construction section to extend the pipe line of the pipe body In the laying method, a seal for preventing intrusion of sediment into the mouth of the pipe at the tip of each construction section
After installing the material , it has pressure resistance along the seal material for preventing intrusion of soil and sand, and gradually faces from the top to the bottom.
A pipe laying method characterized by installing and burying a block-shaped backing material formed in a tapered box having a reduced volume and temporarily restoring it.