JPS61228184A - Method of construction of burying of flexible pipe - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is mainly used for burying water and sewerage pipes, electric-optical cable laying pipes, and in particular soft pipes (thin-walled steel pipes, cast iron pipes, asbestos pipes, etc.). pipes with low compressive strength such as Teflon, vinyl chloride pipes, and other synthetic resin vibrators or hoses)
Regarding management construction methods suitable for burying.

[Prior art and its problems]

In order to drain sewage in general households, etc., in order to connect a pipe from a drainage basin to a main sewer pipe, conventionally, the ground must be excavated.
An open-cut method is used in which one end of the pipe to be buried is connected to the main sewer pipe, the other end is connected to a sump, and then the pipe is backfilled and buried.

The above-mentioned cut-and-cover method is used because the pipes to be buried are usually vinyl chloride pipes, which are soft, making it impossible to use the propelled press-in method, and because the pipes to be buried are installed in the existing main pipe in a watertight manner. Due to the inability to be mechanically connected to the state. Therefore, manual connection work was indispensable, and cut-and-cut work was unavoidable.

As a result, not only did management and installation work require a lot of time and effort, but there was also a lot of waste, such as having to take major detours in areas where excavation was not possible, and there were drawbacks such as increased costs.

[Purpose of the invention]

The present invention focuses on the above-mentioned drawbacks of the prior art, and has developed a flexible pipe that can mechanically bury a weak pipe, such as a soft pipe, in a predetermined position without using the cut-and-cut method, and at the same time provide a watertight connection to an existing pipe. This was done for the purpose of providing a method for burying pipes.

[Summary of the Invention] - In order to achieve the above object, the soft pipe burying method according to the present invention includes a step of propelling excavation using a screw auger and a casing until reaching the position of an existing buried object such as an existing buried pipe;
A step of drilling an existing buried object buried in a predetermined position with the tip of a screw auger, and a step of drilling a soft material whose tip is shaped to tightly fit into a hole drilled in the existing buried object after the screw auger is pulled out of the casing. a step of inserting a tube;
This method is characterized by including a step of press-fitting the tip of the soft tube into a hole in an existing buried object, and a step of pulling out and recovering the casing.

[Embodiments of the invention]

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

Fig. 1 shows an example of a management installation device that is directly used to implement the soft pipe burying method according to the present invention. The tip of the guide frame 2 is the shaft 3
The rear end of the guide frame 2 and the base frame 1 are connected by a length-adjustable stay 4, so that the guide frame 2 can be fixed at any inclination angle. .

On the guide frame 2, a motor 6 as a drive unit 5, a reducer 7, and a propulsion jack 8 are mounted on the rear portion of the guide frame 2 so as to be able to slide along the guide frame 2, and a screw auger is mounted on the output shaft of the reducer 7. The proximal end of the drive unit 9 is connected in a freely connecting manner, and a casing 11 is connected in a freely connecting manner to the driving portion 5 via a casing coupling 10.

The propulsion jack 8 is fixed to the drive unit 5, and its rod 8A
is connected to the receiving part 12 of the tip part 2A of the guide frame 2 via a strut 13 as a spacer, and by supplying pressure oil to the rod 8A side of the cylinder 8B of the propulsion jack 8, this cylinder 8B is pulled. The entire drive section 5 is lowered along the guide frame 2.

The screw auger 9 has a screw shaft 9A as in the conventional case.
The screw blade 9B has a spiral screw blade 9B on the outer periphery of the screw blade 9B, and the screw blade 9B at the tip becomes smaller in diameter toward the tip, and the screw head 9C and the screw blade 9B have a digging blade 14, 14 at the tip. It is provided.

Next, with reference to FIGS. 2 to 5, an example in which the construction method of the present invention is applied to a case where a sewer main pipe 15 buried underground and above ground are connected by a vinyl chloride pipe 16 will be described.

First, as shown in FIG. 2, the base frame 1 is fixed in the direction in which the sewage main pipe 15 is buried, and the angle of the guide frame 2 is set by expanding and contracting the stays 4.

Next, the screw auger 9 is rotated and the drive unit 5 is advanced by the propulsion jack 8 to excavate and remove the ground 17. In this case, the casing 11 may not need to be rotated depending on the properties of the ground 17.

If the excavation does not reach the sewage main pipe 15 even when the lowering limit of the drive section 5 is reached, the screw auger 9 and casing 11 are temporarily separated from the drive section 5, and the drive section 5 is raised again to add additional material in between. Connect the screw auger 9 and casing 11 and start drilling again.

When the tips of the screw auger 9 and the casing 11 reach the side of the main sewage pipe 15, only the screw auger 9 is rotated to connect the connection hole 18 to the main sewage pipe 15, as shown in the second figure.
perforate.

After drilling, the screw auger 9 is pulled out and the vinyl chloride pipe 16 to be buried is inserted in its place. This vinyl chloride pipe 16
As shown in FIG. 3, the tip is formed in a tapered shape with a slightly smaller diameter, and has an outer diameter that allows it to fit into the connection hole 18 as tightly as possible. Also, if necessary, this tip 16
Water-swellable rubber 19 is attached to the outer peripheral surface of A to ensure watertightness.

If the ground 17 is soft, mortar 20 is injected into the gap between the casing 11 and the vinyl chloride pipe 16 to fill it as shown in the fourth figure. In this case, as described above, water is applied to the outer peripheral surface of the tip 16A of the vinyl chloride pipe 16.
By attaching the x-type rubber 19, it expands due to moisture in the mortar 20, and the watertightness between the vinyl chloride pipe 16 and the main sewage pipe 15 can be further ensured.

After this, when the casing 11 is pulled out, a mortar gi20' is formed around the vinyl chloride pipe 16 as shown in FIG.
6 is protected, and even if it is a soft pipe, it becomes a buried pipe that can sufficiently withstand pressure from the tonosho and the ground.

In addition, as shown in FIG. 6 of the above embodiment, the soft tube has a diameter smaller than that of the connection hole 18, and the diameter of the soft tube is smaller than that of the connecting hole 18.
A may be provided with a flange 16B so that it can be connected and fitted to the existing pipe as tightly as possible.

〔Effect of the invention〕

As explained above, according to the soft pipe management construction method according to the present invention, the pipe is inserted and buried in a hollow casing by excavating the ground. Even pipes can be easily buried, and since connection holes are drilled into the existing structure using a screw auger during the excavation process, there is no need for special drilling work, and the tip of the pipe is inserted into this connection hole. Since the sections are press-fitted to connect, a reliable connection can be made even underground, and this method has the advantage of allowing soft pipes to be buried more efficiently than conventional cut-and-cover methods. In this embodiment, the case of a sewage main pipe is explained as the existing buried object, but even an existing buried object such as an underground tank can be connected by the same process. Furthermore, electrical/optical cable installation pipes can be connected using a similar process.

[Brief explanation of drawings]

Figure 1 is a side view showing an example of the management equipment used to implement the construction method of the present invention, Figures 2 to 5 are explanatory views showing the management installation process, and Figure 6 is another example of the soft pipe tip. FIG. 1... Base frame, 2... Guide frame, 4
... Stay, 5... Drive unit, 8... Propulsion jack, 9... Screw auger, 11... Casing, 1
3-0° Strad, 15... Sewer main pipe, 16...
PVC pipe, 18...connection hole, 19...water-sensitive rubber, 20...mortar. Applicant's agent Inomata Sei Procedural Amendment May 4, 1985

Claims (1)

[Claims] A process of propelling excavation using a screw auger and a casing until reaching the position of an existing buried object such as an existing buried pipe, a process of drilling a hole in the existing buried object buried at a predetermined position with the tip of the screw auger, and a process of moving the screw auger to the casing. inserting a soft tube whose tip is shaped to tightly fit into the hole drilled in the existing buried object after being pulled out from the soft tube; press-fitting the tip of the soft tube into the hole of the existing buried object; A method for burying soft pipes, which includes the step of pulling out and recovering the casing.