JP2953843B2 - Pipe line laying method by non-cutting propulsion method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial applications] The present invention relates to
The present invention relates to a method of laying a pipeline by an uncutting propulsion method suitable for laying a pipeline buried underground.

[0002]

[Prior Art] When laying pipes to be buried in the ground, such as sewers and waterworks, sewage, manholes, cleaning outlets, pipe branches, etc. (hereinafter referred to as sewage squirrels, etc.) in the middle of pipes to be laid. In many cases, pit excavation is required for installation. Except for excavation of these pits, there are cases in which open-cut type pipeline excavation performed from the ground cannot be performed due to roads, buildings, and the like.

In the case described above, for example,
Pipe laying work is carried out by a non-cutting propulsion method that does not cut from the ground called the "buried pipe method with small diameter pipe" disclosed in Japanese Patent No. 38598/1996 or the "flow molding method". .

[0004] The above prior art outlines that a plurality of shafts (pits) required at both ends and in the middle are first excavated. Next, a drilling pipe having a fluid jet propulsion mechanism attached to the tip drill head drills the pits at one end one after another through the pits on the way to the pit at the other end. In this method, a predetermined water supply pipe, a sewer pipe, or the like is connected to the excavation pipe to lay a pipeline in the excavation hole.

[0005] The non-digging propulsion method, which is the basis of the above-mentioned method, is a method that can excavate up to a distance of about 100 meters in the ground by electronic guidance from the ground, and is characterized by a lower cost than excavating from the ground. Also have.

[0006]

However, the conventional pipe laying method by the non-cutting propulsion method is, for example, 15 meters or 20 meters from the pit at the end where the excavating device is set.
It is possible to excavate accurately up to the next pit a meter away, but due to the weight of the tip drill head, it is difficult to control the direction of the tip drill head in the pit part, and to the next and further pits There is a problem in that excavation cannot be performed with the expected accuracy when excavating continuously.

[0007] In addition, moving the excavating device for each pit, resetting the excavating device, and performing the excavation work has a problem in terms of labor and work days.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and lays a buried pipeline which requires excavation of a pit for installing a sewage basin at a relatively short interval. It is an object of the present invention to provide a pipe laying method by a non-cutting propulsion method which can be easily implemented by a non-cutting driving method.

[0009]

Therefore, according to the present invention, a pipe laying method using a non-cutting propulsion method according to the present invention includes a step of digging a pit with a pit excavation part in the middle, and a pit excavation part in the middle. A step of digging the underground between the pits sandwiching the pit by a non-cutting propulsion method and laying a pipe, a step of digging an intermediate pit at a predetermined location from above the laid pipe, and a predetermined work in the pit The above-mentioned object is achieved by a method characterized by comprising the step of performing the following.

[0010]

According to the above construction, a pit is excavated in the middle of the pit to be excavated, and a pipe is laid between the excavated pits by digging the underground by a non-digging propulsion method. Unlike this, since the weight of the tip drill head is large, it is not difficult to control the direction of the tip drill head in the pit portion, and it is possible to accurately dig into the ground to the other pit and lay a buried pipe.

The pit required in the middle of the pipe can be easily excavated from above the buried pipe. The work required to form sewage pits in the excavated pits, that is, sewage pits, manholes, cleaning ports, pipe branching, etc. can be performed. Can be completed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pipeline laying method according to the present invention will be described below with reference to an embodiment. 1 to 4
FIG. 3 is a process explanatory view showing a process configuration of one embodiment.

First, as shown in FIG. 1, pits 1 and 2 are excavated on a pipeline to be laid. In this embodiment, the pit 1 and the pit 2 are about 80 meters apart from each other, and there are two pit excavation places in the middle of the pit 1 for installing a drainage basin and the like.

Next, the underground between the pits 1 and 2 is dug by the conventional non-cutting propulsion method or a method similar to the method, and a sewer pipe 3 is laid (FIG. 2).

If necessary, the next pit is excavated again by sandwiching one or a plurality of scheduled pit locations, and the underground is dug in the same manner as described above, and a sewer pipe is laid.

Next, as shown in FIG. 3, pits 4 and 5 are excavated from above the laid sewer pipe 3 at a location where the excavated pit 1 and pit 2 are to be installed, such as a sewage pit. FIG. 3 shows a state in which the sewer pipe 3 exposed in the pits 4 and 5 has been cut by a predetermined dimension for installation of a sewage basin or the like.

The work required to form sewage pits and the like in the excavated pits 1, 2, 4, and 5, ie, sewage pits,
Perform various operations required for manholes, cleaning openings, pipe branching, etc. to complete the buried pipeline (Fig. 4).

FIGS. 5 to 7 are cross-sectional views showing examples of a main body suitable for a sewage basin or the like installed in the pit.

FIG. 5 shows an example in which the bottom of the main body 6 is widened to reduce the load on the sewer pipe 3.
This is a protective cover that prevents damage to the camera.

FIG. 6 shows a sewage pipe 3 on the bottom of the main body 6.
The recess 7 is provided in the same direction as the laying direction of the sewage pipe, so that the load on the sewer pipe 3 can be reduced.

FIG. 7 shows that the sewage pipe 3
The two dents 7 are provided in the same direction as the laying direction, and the load on the two sewer pipes 3 below the main body 6 can be reduced.

The pit 5 shown in FIG. 4 shows an example in which a sewage tank with a vacuum valve is installed. Sewage squirrel with vacuum valve
It is a type of sewage basin used for vacuum sewerage equipment, and is connected to a sewage basin body 6 having a sewage reservoir and an external pipeline in a negative pressure state when the sewage in the sewage reservoir rises to a predetermined level. This is a sewage tank provided with a vacuum valve 9 for discharging and discharging sewage collected in a sewage sump into a negative pressure sewer pipe.

FIG. 8 to FIG. 10 are explanatory views of the installation work of the above-mentioned sewage tank with a vacuum valve.

First, the sewer pipe 3 is exposed in the excavated pit 5 as shown in FIG. A branch pipe 10 for joining is attached to the sewer pipe 3. In this embodiment, a 45 degree Y cheese 11 is used as shown in FIG.
Is connected and started.

Then, after filling the bottom of the excavated pit 5 and rolling it to cover the sewer pipe 3, the sewage body 6 with a vacuum valve is placed in the pit 5 as shown in FIG.
A branch pipe 10 for merging connected to the sewer pipe 3 and a connecting pipe 12 connected to the vacuum valve 9 in the sewage tank equipped with a vacuum valve are connected directly or in the middle via a connecting pipe.

After that, sewage inflow pipe (not shown) for sending sewage to the sewage with vacuum valve, necessary control piping and wiring, cover the sewage with vacuum valve and cover the sewage with vacuum valve Landfilling is completed, and the installation work of the sewage tank with vacuum valve is completed.

The above-mentioned various pipes can be connected by an electrofusion joint (EF joint), an RR joint or the like depending on the material of the pipe.
Various methods such as connection can be used, and the connection method can be appropriately selected and executed.

When starting the embankment and compaction process on the bottom of the pit 5, the sewer pipe 3 exposed in the pit 5 is covered with the protective cover (not shown), and the embankment and compaction work is performed. By taking into account or
Sewage with vacuum valve The structure that has a depression on the bottom of the main body, just above the pipeline, has a recess, and the direction of the depression on the bottom of the sewage basin with vacuum valve is aligned with the laying direction of the sewer pipe 3. Place. At this time, the volume of the embankment directly above the sewer pipe 3 and the amount of tamping are adjusted to form a void inside the depression on the bottom surface, or the earth pressure inside the depression is reduced, and the vacuum valve is reduced. The effect of the load on the sewer pipe 3 can be reduced because the waste water is attached, and an accident of the sewer pipe 3 can be prevented.

As described above, this embodiment makes it possible to efficiently and easily lay a buried pipeline having a plurality of sewage basins, etc., by taking advantage of the non-cutting propulsion method.

In particular, the vacuum type sewer pipes need to be provided with a lift section every about 150 meters, and to be laid with a slope of 0.2% or more between the lift sections. The excavation formation of the lift portion can also be implemented as one of the drainage basins described above, and the pipe laying method by the non-cutting propulsion method of the present invention can be implemented.

The pipe laying method according to the present invention can, of course, be applied to a conventional natural flow type sewer pipe or the like.

[0032]

As described above, according to the pipe laying method by the non-cutting propulsion method according to the present invention, a pit is excavated in the middle of a pit excavated portion, and the underground between the excavated pits is excavated. Excavation by the non-cutting propulsion method and laying a pipe between the pits, unlike the conventional non-cutting propulsion method, the weight of the tip drill head is so large that it becomes difficult to control the direction of the tip drill head in the pit portion It is possible to excavate exactly underground to the other pit and lay a buried pipe.

The pit required in the middle of the pipe can be easily excavated from above the buried pipe at a predetermined location. Then, it is possible to carry out the operations necessary for forming sewage pits, etc. in the excavated pits, that is, various operations required for sewage pits, manholes, cleaning openings, pipe branching, etc. The laying work of a buried pipeline that requires excavation of a pit for installing a masuma or the like can be easily performed by a non-cutting propulsion method.

[Brief description of the drawings]

FIG. 1 is a process explanatory view of one embodiment. (Excavation of tip pit)

FIG. 2 is a process explanatory view of one embodiment. (Pipe laying)

FIG. 3 is a process explanatory view of one embodiment. (Excavation of intermediate pit)

FIG. 4 is a process explanatory view of one embodiment. (Placement of sewage masu)

FIG. 5 is a cross-sectional view of the sewage basin body of one embodiment.

FIG. 6 is a cross-sectional view of the sewage basin body of one embodiment.

FIG. 7 is a cross-sectional view of one embodiment of the sewage basin body.

FIG. 8 is an explanatory view of a sewage basin installation work with a vacuum valve according to one embodiment.

FIG. 9 is an explanatory view of installation work of a sewage masquerade with a vacuum valve according to one embodiment.

FIG. 10 is an explanatory view of a sewage basin installation work with a vacuum valve according to one embodiment.

[Explanation of symbols]

 1, 2, 4, 5 Pit 3 Sewer pipe 6 Masuda body 7 Depressed bottom of body 8 Protective cover 9 Vacuum valve 10 Branch pipe for merging

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI F16L 1/038

Claims (1)

(57) [Claims] 1. A step of excavating a pit with a pit to be excavated in the middle, and a step of laying a pipe by excavating the underground between the pits with the pit to be excavated in the middle by a non-cutting propulsion method A step of digging an intermediate pit from above the laid pipe to a predetermined location, and a step of performing a predetermined operation in the pit.