JPH07119866A - Laying construction method of underground buried pipe - Google Patents

Abstract

PURPOSE:To improve the efficiency by separating a civil work process and a piping work process, and minimizing the excavating soil amount and the backfilling soil amount. CONSTITUTION:A narrow groove 2 is excavated by a groove excavator 10, and then, by using a piping hole excavator 23 which has a built-in excavating head 24 and an earth-moving conveyer 25 to a cylinder connected to the boom 22 of a heavy machine 20 running on a road surface 1, a piping hole 3 which has the diameter section larger than a protective pipe 4 is excavated in a buried pipe laying track 53, and the soil is exhausted. Then the protective pipe 4 is provided in the excavated piping hole 3, the backfilling and the rollfilling of the groove 2 are carried out, a buried pipe 7 is provided in the protective pipe 4, and a grout material is filled to the clearance between the buried pipe 7 and the protective pipe 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laying underground pipes which can efficiently lay underground pipes such as gas pipes and water pipes.

[0002]

2. Description of the Related Art Conventionally, when piping gas pipes, water pipes, etc., it is necessary to bury a buried pipe at a certain depth or more from the surface of the earth in order to protect these pipes. There are two methods for laying these buried pipes: open cutting method and non-open cutting method. Among them, in the open cutting method, the pavement of the road surface of the pipe route to be buried is first destroyed and the unit length is much wider than the diameter of the buried pipe. After excavating the groove of width and removing the earth and sand, after civil engineering work such as pile retaining with sheet pile and water change, the pipe is hung in the excavated groove and joined by welding with the pipe buried earlier. The piping work is performed, and then the civil engineering work process and the piping work process are alternately performed in a series of order so as to perform backfilling. In addition, the excavated trench may not be excavated in an inverted trapezoidal shape and the mountain is not clamped, but in this case, the amount of excavation and backfilling will be significantly increased, and the space occupied by the road during construction will increase, causing a traffic obstacle. Become. Of these processes, the piping work process requires workers with specialized skills such as welding, inspection, and corrosion protection, but these workers are idle during the civil work process, and the civil engineer Sometimes there is play, which is extremely inefficient work. In contrast to such a conventional underground laying method for laying underground buried pipes, a "civil engineering method for underground buried pipes" has been proposed as a prior art for the purpose of improving the efficiency of the civil engineering work process. 4-2
9689 gazette). In this construction method, as shown in FIG. 12, a space securing material 60 having a hollow space is arranged in a groove 61 formed by excavating the ground to remove the earth and sand,
The soil 62 is backfilled on the space securing material 60 to fix the space securing material 60, and the embedded pipe 7 is drawn into the hollow space of the fixed space securing material 60, and then the space securing material 60 is secured.
Since the filler is filled in the gap between the buried pipe 7 and the buried pipe 7, the civil engineering work process and the piping work process are separated to improve the efficiency of the buried pipe laying work.

[0003]

According to the above-mentioned prior art, since the civil engineering work process and the piping work process can be performed independently of each other, there is no play in the operator and the efficiency of the pipe laying work can be improved. There are advantages. However, the space securing member 6 is formed by excavating the groove 61 that is equal to or wider than the conventional one.
Since it is necessary to install 0, the backfill amount of excavated soil is
It is equal to or more than the conventional one, and the road surface cannot be passed until the backfilling work is completed, and the work is carried out by entering the excavation groove, which poses a safety issue. INDUSTRIAL APPLICABILITY The present invention enables the civil work process and the piping work process to be performed separately, and minimizes the amount of excavated soil and the amount of backfilled soil to further improve the efficiency of the civil work process and at the same time reduce traffic obstacles. It is an object of the present invention to provide a method for laying an underground buried pipe that can improve the safety of workers.

[0004]

The present invention solves the above problems by the following means. Road surface 1 of the piping route
The trench excavator 10 excavates the narrow trench 2 to the depth of the buried pipe, and subsequently the excavation head 24 and the soil discharging conveyor 25 built in the cylinder 23a connected to the boom 22 of the heavy machine 20 traveling on the road surface 1 are installed. With the pipe hole excavator 23 provided, the pipe hole 3 having a larger diameter cross section than the protection pipe 4 is excavated through the groove 2 to the buried pipe laying track 53, and the soil is excavated. Then, the pipe hole 3 is buried in the excavated pipe hole 3. After arranging the protection tube 4 having a diameter larger than that of the tube 7 and arranging the protection tube 4 in the unit construction section, backfilling is performed in the gap between the protection tube 4 and the pipe hole 3 and the groove 2 is backfilled. Then, the buried pipe 7 is piped in the protection pipe 4 by rolling the
And a grouting material 5 is filled in a gap 7a between the protective tube 4 and the protection tube 4, and the underground buried tube laying method is characterized. Also, the road surface 1
The groove excavator 10 is arranged in front of the heavy equipment 20 traveling on
It is also possible to carry out construction using an excavator integrally equipped with a pipe hole excavator 23 connected to the boom 22 behind the heavy machine 20. Further, the narrow groove 2 is excavated and the pipe hole 3 is formed.
After excavating, the upper part of two side plate frames 42 having a width slightly narrower than the width of the groove 2 is fixed to the lower part of the upper surface plate 41 wider than the groove 2, and the two side plate frames are also fixed. Steel lining plate unit 40 configured by connecting 42 with stiffening material 43 is sequentially inserted into the opening of road surface 1 with the progress of excavation of groove 2 or excavation of pipe hole 3, and lining is performed, It is also possible to excavate the pipe hole 3 or backfill the groove 2 while removing the steel lining plate unit 40.

The underground buried pipe laying method of the present invention takes in the respective advantages of the open cutting method and the non-open cutting propulsion method, compensates for their drawbacks, and separates the civil engineering work step and the piping work step, and It aims to improve work efficiency by allowing each to be performed independently without being affected by the progress. That is, the narrow groove 2 in the present invention is intended to minimize the amount of unnecessary excavated soil and the amount of backfilled soil, and the width that the boom 22 of the pipe hole excavator 23 and the soil discharge conveyor 25 can pass through. The excavation width is narrower than the conventional excavation method. In addition, by using the narrow groove 2, it is possible to reduce the space occupied by the road surface 1 during construction, reduce traffic obstacles, and close the opening of the road surface 1 with the simple lining plate unit 40. Is possible. further,
In the case of the non-excavation propulsion method, it is difficult to control the propulsion direction, but in the case of the present invention, the buried pipe 7 is accurately guided by using the groove 2 excavated along the planned piping route that can be easily set on the road surface 1 as a guide. The piping hole 3 for storing can be excavated. In the civil engineering work process of the present invention, trench excavation, pipe hole excavation, protection pipe arrangement, and backfilling soil backfilling can be performed separately and continuously without being affected by the piping work process. High efficiency. Further, in the piping work process, if the protection pipe of the civil work process is provided, the road surface 1 can be immediately restored and the traffic regulation can be released without being affected by the process of the civil work. The protection pipe 4 secures a space for piping underground and allows civil engineering work and piping work to be performed separately, and also has a function of protecting the buried pipe 7 from earth pressure and a corrosive environment. .

[0006]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows an entire underground buried pipe laying construction method according to an embodiment of the present invention. The construction method of the present invention is roughly divided into the following working steps. That is, on the road surface 1 of the pipe route, a groove excavation process for excavating the narrow groove 2 to the buried pipe depth by the groove excavator 10, and an excavation head 24 connected to the boom 22 of the heavy machine 20 traveling on the road surface 1, The boom 22 of the pipe hole excavator 23 provided with the earth discharging conveyor 25 and the earth discharging conveyor 25 are passed through the groove 2 and the buried pipe laying track 53 is provided with the pipe hole 3 having a larger diameter cross section than the protective pipe 4 described later. Piping hole excavation step of excavating and removing earth, protection tube disposing step of drawing in the protection tube 4 having a diameter larger than the buried tube 7 in order to prevent collapse of the wall of the piping hole 3, and the protection tube per day After the installation of the unit construction section, the protection tube 4
And a backfilling step of backfilling the gap between the piping holes 3 and backfilling and rolling of the groove 2, a piping step of installing the buried pipe 7 in the disposed protection tube 4, and the protection tube 4. Buried pipe 7
And a grout step of filling the gap 7a with the grout material 5.

2 to 8 show changes in the cross section of the ground formed by the above steps.

FIG. 9 shows a groove excavator 10 and a pipe hole excavator 23.
In which one is attached to one heavy machine 20, a bucket type groove excavator 10 supported by an endless belt or a chain is attached in an inclined state in front of the caterpillar type heavy machine 20,
Behind the heavy equipment 20, an excavation head 24 connected to a boom 22 and an earth discharging conveyor 25 are provided. By using the device configured as described above, one operator can perform trench excavation and pipe hole excavation, so that the efficiency is further improved. Further, in the pipe hole excavator 23 in the device configured as described above, the protection pipe 4 is arranged by the excavation head 24 incorporated in the cylinder 23a connected to the boom 22 of the caterpillar heavy machine 20 traveling on the road surface 1. Drill possible piping holes 3. Further, the cylinder 23a containing the excavation head 24 is connected to the boom 22 having a plurality of nodes capable of passing through the groove 2 and is controlled and maintained in a horizontal posture.
An earth discharging conveyor 25 for discharging the excavated earth and sand to the ground is provided.

FIG. 10 shows the excavation head 24 and the earth discharging conveyor 2.
5 shows an example of the configuration with No. 5, the earth and sand excavated by the tip cutter 24a driven by the hydraulic motor 27 is sent to the rear by the screw conveyor 26,
Then, the soil is discharged to the ground by the soil discharging conveyor 25, which is a bucket conveyor protruding in the inclined posture through the groove 2. The trench excavator 10 has a buried pipe depth (about 1.5
A bucket with an excavating blade in which a groove 2 having a narrow width (up to 2.0 m) (width of 30 cm) is attached to an endless chain at intervals, which is continuously used for excavating and discharging earth. It is possible to select a trench cutter having an optimum digging blade according to the soil quality. Although the groove excavator 10 is slightly less efficient than the trench cutter, a backhoe may be used.

Next, the construction procedure of the construction method of the present invention will be described with reference to FIGS. First, a starting pit 51 is provided at the starting point of the planned piping route. The starting pit 51 is a bendable portion of the piping route or a distance that can be retracted or pushed in when the buried pipe 7 is installed in the protection pipe 4 ( It is necessary to install every hundreds of US),
The length and width are such that the buried pipe 7 can be connected and extended in the pit. Next, two cut slits 1b are formed in the planned pavement route road surface pavement portion at intervals of the groove width by an asphalt cutter or the like to remove the road surface pavement (see FIG. 2). The groove width needs to be a width that allows passage of the pipe hole excavator 23, the boom 22, and the earth discharging conveyor 25, and is about 30 cm. Then, the road surface 1 from which the pavement has been peeled off is excavated by the groove excavator 10 to the depth of the upper end of the buried pipe (about 1.5 to 2.0 m),
The narrow groove (width of about 30 cm) 2 is formed along the pipe route (see FIG. 3). Next, from the rear of the trench excavator 10, the pipe hole excavator 2
A pipe hole 3 having a diameter larger than that of the protection pipe 4 is excavated along the buried pipe laying track 53 by 3 (see FIG. 4). Further, the pipe hole excavator 23 is installed in the start pit 51 at the excavation head 24.
Is positioned at a predetermined position (buried pipe depth), the operation is started, and the heavy equipment 20 is moved forward. Then heavy machinery 20
The pipe hole 3 is formed in accordance with the movement of, and the earth and sand excavated by the excavation head 24 are discharged to the ground by the earth discharging conveyor 25 and loaded on a dump truck or the like. The heavy equipment 20 moves in the groove 2 previously excavated while passing the boom 22 to which the excavation head 24 is connected and the earth discharging conveyor 25. Further, when the groove excavator 10 and the pipe hole excavator 23 are provided in one heavy machine 20, one operator can perform the pipe hole excavation at a certain distance from the groove excavation.

After excavating the pipe hole 3, a protective pipe 4 is arranged to prevent the formed hole wall from collapsing (see FIG. 5). The protection pipe 4 is arranged to form a space for buried pipes in the ground, is lightweight, has high strength against external pressure, and is easy to connect, such as thin-walled steel pipes, stainless pipes, A corrugated pipe or a vinyl chloride pipe is used to connect and extend at the starting pit 51 or the intermediate pit 52. Since it is only necessary to secure the proof stress at the time of pulling in the joint in the protective tube 4, the joint is carried out in a short time by a simple means such as bolt joining, intermittent welding, or adhesion. Further, since it is better to dispose the protection pipe 4 immediately after excavating the pipe hole, the front end of the protection pipe 4 is connected to the rear of the cylinder 23a of the pipe hole excavator 23 to move the heavy equipment 20 when excavating the pipe hole. Road surface type heavy equipment 2 which is pulled in at the same time or prepared separately
The protective tube 4 may be grasped and pulled in through the groove by 0. The protection tube 4 may be formed by spraying quick-setting mortar or the like on the hole wall, in addition to using the above-mentioned ready-made tube. According to this method, since the protection pipe 4 can be formed behind the pipe hole 3 at the same time as the excavation of the pipe hole 3, a backfill material for the gap between the protection pipe 4 and the pipe hole 3 is not necessary, and the backfilling process of the groove 2 is accelerated. be able to. If the lining plate unit 40 as shown in FIG. 11 is used after the trench excavation or the pipe hole 3 is excavated, the excavated wall surface can be prevented from collapsing and the road surface 1 can be passed. This lining plate unit 40
Is an upper plate 41 made of a steel plate having a width of about 20 to 30 mm, which is slightly wider than the groove width, and a side plate frame 42, which is arranged at an interval slightly narrower than the groove width, is assembled by a stiffening member 43. With the progress of the trench excavation or the pipe hole excavation, the lining plate unit 40 is sequentially inserted into the groove opening portion of the road surface 1 to perform lining. This lining plate unit 40
To the lower part of the upper surface plate 41 made of a steel plate having a width of about 20 to 30 mm which is slightly wider than the groove width, the upper parts of the two side plate frames 42 arranged at intervals slightly narrower than the groove width are fixed,
Further, the two side plate frames 42 are joined together via the stiffening member 43. As the trench excavation or the pipe hole excavation progresses, the trench is sequentially inserted into the groove opening portion of the road surface 1 to perform lining. The lining plate unit 40 can be used immediately after excavating the groove, but since it is necessary to remove it when excavating the pipe hole and insert it again, if used after excavating the pipe hole, it can be removed only when backfilling. Good.

When the protection tube 4 has been installed in a predetermined section (unit construction section to be described later), the backfill material 30 such as sand is filled in the gap 3a between the protection tube 4 and the piping hole 3 (FIG. 6). reference). Since the backfill material 30 can be filled through the groove 2 while moving on the road surface 1, it can be easily and reliably filled. Backfilling is performed in the groove 2 from the portion where the backfill material 30 has been filled (see FIG. 7).
Excavated soil, mountain soil, and sand are used as the backfill soil 31, and compaction is performed while compacting the compaction machine 32 for each predetermined layer thickness, and the road surface is temporarily restored. The piping work of the buried pipe 7 can be performed at any time regardless of the civil engineering work process, provided that the protection pipe 4 is installed. Further, the piping work may be performed using a means known as a pipe-in-pipe construction method. That is, the embedded pipe 7 is hung in the starting pit 51 and welded to it, and then the embedded pipe 7 is propelled or pulled into the protective pipe 4 from the intermediate pit 52 (see FIG. 7). Note that, while the buried pipe 7 is being piped in the rear protection pipe 4, the civil works of the front pipe route may be simultaneously performed in parallel. Further, the embedded pipe 7 to be piped can be easily pulled into the protective pipe 4 by providing a plurality of warps also serving as spacers at intervals of about 10 m on the lower side.

When the piping of the buried pipe 7 of a predetermined length is completed,
The grout material 5 such as mortar, air mortar, and sand is filled in the gap 7a between the protective pipe 4 and the buried pipe 7, and the work is completed (see FIG. 8). In order to facilitate the filling work of the grout material 5, it is preferable to attach the filling pipe along the buried pipe 7 in advance. By performing the work as described above, the protection pipe 4 is provided in the ground of the piping route, and the buried pipe 7 can be installed in the protection pipe 4 at any time, and the civil works such as excavation and backfilling can be performed. The process and the piping process can be performed separately, and the traffic regulation on the road surface 1 can be lifted. In the civil engineering work process from trench excavation to restoration of the backfill road surface, the length that can be completed as a unit construction section within the working time of one day is set as the unit construction section, the intermediate pit 52 is provided at the end section, and the predetermined interval is set. Separate and perform. The intermediate pit 52 has such a size that the excavation head 24 of the pipe hole excavator 23 can be taken in and out, and that the protection tube 4 can be connected and extended, and is no longer needed after the protection tube 4 is disposed. Backfill sequentially.

[0014]

Since the present invention is constructed as described above, the following effects can be obtained. Since the civil engineering work process such as excavation and backfilling and the piping work process can be performed separately, there is no play in each worker, which is efficient and the construction period can be shortened. Compared with the conventional excavation method, the upper part has a narrower groove, so the amount of excavated soil can be significantly reduced and the backfill amount can also be reduced, which reduces the construction amount, which is economical and shortens the construction period. Can be achieved. Regardless of the plumbing work, after the backfill road surface is restored in each unit construction section, the traffic regulation can be released immediately and the excavation opening width of the road surface is narrow, so the space occupied by the road surface 1 during construction is small and the lining plate If the unit 40 is used, the road surface opening can be easily closed by the simple lining plate unit 40, so that traffic obstacles during construction can be reduced. The buried pipe track can be accurately excavated and piped using the groove 2 that is easily and accurately excavated on the road surface 1 as a guide. Since the protection pipe 4 is separated from the civil work to perform the piping work, in addition to the role of forming the space in the ground of the protection pipe 4, it is also possible to expect the effect of protecting the buried pipe 7 from earth pressure and corrosive environment. .

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing a method of laying an underground buried pipe according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG.

4 is an enlarged cross-sectional view taken along line CC of FIG.

5 is an enlarged sectional view taken along line DD of FIG.

6 is an enlarged sectional view taken along line EE of FIG.

FIG. 7 is an enlarged cross-sectional view taken along the line FF of FIG.

FIG. 8 is a vertical cross-sectional front view showing a state in which the buried pipe is laid in the ground by the underground buried pipe laying method according to the embodiment of the present invention.

FIG. 9 is a partially longitudinal side view showing an example of an excavator in which a groove excavator and a pipe hole excavator are attached to one heavy machine.

FIG. 10 is a partially longitudinal side view showing an example of a mechanism of an excavating head and an earth discharging conveyor.

FIG. 11 is a perspective view of a lining plate unit.

FIG. 12 is a vertical sectional front view showing a construction example of a conventional technique.

[Explanation of symbols]

 1 Road Surface 1a Pavement 1b Cutting Slit 2 Groove 3 Piping Hole 3a Gap 4 Protective Tube 5 Grout Material 7 Buried Pipe 7a Gap 10 Groove Excavator 20 Heavy Machinery 22 Boom 23 Piping Hole Excavator 23a Cylindrical 24 Excavation Head 24a Tip Cutter 25 Discharge Conveyor 26 screw conveyor 27 hydraulic motor 30 backfilling material 31 backfilling soil 32 compacting machine 40 lining plate unit 41 top plate 42 side plate frame 43 stiffening material 51 start pit 52 intermediate bit 53 buried pipe laying track

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Takahashi 5-9-1 Nishihashimoto, Sagamihara City, Kanagawa Nippon Steel Corp.

Claims (3)

[Claims] 1. A cylinder 23a connected to a boom 22 of a heavy machine 20 which travels on a road surface 1 of a pipeline route by excavating a narrow groove 2 to a depth of an embedded pipe by a groove excavator 10.
A pipe hole excavator 23 having a built-in excavation head 24 and an earth discharging conveyor 25 excavates a pipe hole 3 having a large diameter section from a protective pipe 4 through a groove 2 to a buried pipe laying track 53 for soil removal. Then, the protection pipe 4 having a diameter larger than that of the buried pipe 7 is arranged in the subsequently drilled pipe hole 3, and after the protection pipe 4 of the unit construction section is completed, the protection pipe 4 and the pipe hole 3 are While backfilling the gap, backfilling and rolling of the groove 2 are performed, the embedded pipe 7 is piped in the protective pipe 4, and the gap 7 between the embedded pipe 7 and the protective pipe 4 is provided.
A method for laying an underground pipe, characterized in that a is filled with grout material 5. 2. A groove excavator 10 is arranged in front of a heavy machine 20 traveling on a road surface 1, and a boom 22 is arranged behind the heavy machine 20.
The underground construction pipe laying method according to claim 1, wherein the pipe hole excavator 23 connected to the above is installed by using an excavator integrally provided. 3. A frame 43 having a width slightly narrower than the width of the groove 2 is formed below the upper surface plate 41 wider than the width of the groove 2 after excavating the narrow groove 2 and the pipe hole 3. The fixed steel lining plate unit 40 is sequentially inserted into the opening of the road surface 1 to cover the lining 2 as the trench 2 or the pipe hole 3 is digging, and the steel lining plate unit 40 is removed. The method for laying an underground pipe according to claim 1 or 2, wherein the pipe hole 3 is excavated or the groove 2 is backfilled.