KR102420920B1 - Horizontal Directional Drilling method for riverside and beach poor ground - Google Patents

Abstract

The present invention relates to a directional press-in method applied to the riverside and coastal soft ground, which can efficiently and economically supply power, communication, gas, etc. The directional press-in method of the present invention comprises: a preparation step; a pit forming step; a coastal underground pipe forming step; an inner pipe installation step; an excavation step; and a reaming and pooling step.

Description

Directional Directional Drilling method for riverside and beach poor ground

The present invention relates to a directional indentation method applied to the soft ground along the coast, and more specifically, to the soft ground along the river and the coast, which mainly consists of gravel and sand, soft and highly compressible clay, silt and peat, etc. It is related to the directional press-in method applied to the soft ground along the river and the coast where it is possible to install the pipe for the purpose of being buried using the construction method.

In general, the non-opening excavation method is a construction method of making a tunnel underground without directly excavating the road, unlike the open method, which is done through excavation of the road surface when underground pipelines such as water and sewage pipes, power pipes, communication pipes, and gas pipes are buried. This non-interleaved excavation method is generally known as the Horizontal Directional Drilling method (HDD), and this method is recognized as superior to other methods in reducing social costs and securing safety.

This directional indentation method consists of a pre-preparation step - a pit formation step - an excavation step - a drilling and pulling step. First, after completing the preliminary preparation steps such as surveying and linear determination, as shown in FIGS. 6 and 7 , the starting sphere 18 and the reaching sphere 20 are formed. The starting hole 18 is a pit for work formed at the part where the drilling of the pilot hole starts, and the reaching hole 20 is a work pit where the end of the pilot hole is located.

In the excavation step, the drill pipe and the hollow rod 16 are continuously pushed into the ground using the press-fitting equipment 10 after arranging the press-fitting equipment 10 on the side of the starting port 18. At this time, the drill pipe at the tip The drill bit 22 is mounted so that the drill bit 22 receives the rotational force and the drilling force from the press-fitting equipment 10 and digs into the ground, and excavates while moving to the arrival hole 20 side along the designed path, and the drill bit ( 22) While continuously connecting the hollow rod 16 at the rear, a pilot hole leading from the start port 18 to the arrival port 20 is formed.

In the drilling and pulling step, when the drill bit 22 arrives at the arrival port 20 , the drill bit 22 is replaced and mounted with the drilling machine 26 , and a hollow rod connected to the press-fitting device 10 . (16) is reversed. The reamer 26 receives rotational force and expulsion force from the press-fitting device 10 and expands the inner diameter of the pilot hole while passing through the pilot hole to form an expansion hole. At the same time, by performing the pulling step of connecting the target pipes for water and sewage pipes, power pipes, communication pipes, gas pipes, etc.

On the other hand, most riversides and shorelines are composed of soft ground composed of soil layers such as gravel and sand, soft and highly compressible clay, silt, and peat. Therefore, due to frequent subsidence during underground excavation, it was practically impossible to install pipes for buried purposes such as water and sewage pipes, power pipes, communication pipes, and gas pipes in underground pipelines using the directional press-in method. In particular, there was a problem in that the supply of water, sewage, electricity, communication, gas, etc. to the area adjacent to the riverside or the coast was not economically and smoothly supplied.

1. Republic of Korea Patent Registration No. 10-1436816 (2014.09.02. Announcement)

Accordingly, the present invention has been devised to solve the problems of the related art as described above, and its purpose is mainly for the riverside and coastal soft ground, which is composed of soil layers such as gravel and sand, soft and highly compressible clay, silt, and peat. Also, it is to provide a directional indentation method that is applied to the riverside and coastal soft ground where it is possible to install a pipe for the purpose of being buried using the directional indentation method.

One form of the directional press-fitting method applied to the riverside and coastal soft ground according to the present invention for achieving the object of the present invention is surveying for laying underground pipes such as water and sewage pipes, power pipes, communication pipes, and gas pipes and the pre-preparation step of preparing the linear crystals and related materials and equipment; A pit forming step of forming a starting pit that is a working pit of the part where the underground of the coastline starts, and an arrival part that is a working pit of the part where the underground ends including a section where the underground of the coastline ends; Drive the first underground pipe at the starting port along the alignment determined through the survey, dig up the soil inside the first underground pipe and empty it to prepare a work space, then attach the second underground pipe to the first underground pipe again and install the equipment. After forcibly pushing the 1st and 2nd underground pipes forward, sending the soil inside the 1st and 2nd underground pipes to the outside is repeated until the end of the coastal soft ground. A coastal underground pipeline forming step of forming a pipeline; a sub-pipe installation step of fixing and supporting the sub-pipe to each underground pipe with a lower supporting leg so that the sub-pipe is positioned at the inner center of the coastal underground pipe; After arranging the excavation equipment on the side of the starting port, the drill pipe and the hollow rod are continuously connected to the excavation equipment, but the drill pipe and the hollow rod are pushed in while passing through each inner tube inside the underground pipe and are connected to the drill pipe and an excavation step of forming a pilot hole leading from the end point of the soft ground on the shore to the arrival hole with the mounted drill bit; When the drill bit arrives at the arrival port, the drill bit is replaced and mounted with a drilling machine, and then the hollow rod connected to the excavation equipment is reversed. It is characterized in that it consists of a drilling and pulling step of forming a hole and connecting the target pipe to the reamer so that the target pipe is towed by the reamer to install the target pipe in the underground pipe.

As described above, the present invention mainly consists of a soil layer such as gravel and sand, soft and highly compressible clay, silt, and peat, which is practically impossible using the directional press-fitting method. It is possible to install in the underground pipeline of It has the effect of efficiently and economically supplying water, sewage, electricity, communication, gas, etc. to the adjacent areas more smoothly.

1 is a block diagram showing the directional indentation method applied to the riverside and coastal soft ground according to the present invention.
2 is a photograph showing a state of installing a subpipe in the underground pipe formed in the riverside and coastal soft ground by the riverside and coastal underground pipe forming step of FIG.
Figure 3 is a photograph illustrating a state in which the inner tube is installed inside the underground tube of Figure 2;
Figure 4 is a photograph showing another embodiment of the bundle tube of Figure 3;
5 is a photograph showing a state in which the hollow rod connected to the press-in equipment of the starting port advances or retracts into the underground pipe of the riverside and coastal soft ground through the inner pipe in the excavation step, expansion and pulling step of FIG. 1;
6 and 7 are exemplary views for explaining a general directional indentation method,
6 shows the excavation step,
7 shows the drilling and pulling steps.

Advantages and features of embodiments of the present invention, and methods of achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform those having the invention, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In describing the embodiments of the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. And the terms to be described later are terms defined in consideration of functions in the embodiments of the present invention, which may vary according to intentions or customs of users and operators.

Hereinafter, the directional indentation method applied to the riverside and coastal soft ground according to the present invention will be described in detail according to embodiments with reference to the accompanying drawings.

1 is a block diagram showing a directional indentation method applied to the riverside and coastal soft ground according to the present invention, and FIG. is a photograph showing a state of installing the , and FIG. 3 is a photograph illustrating a state in which an inner tube is installed inside the underground tube of FIG. It consists of steps - pipe installation step - excavation step - drilling and pulling steps. First, the preliminary preparation steps such as surveying, alignment, and related materials and equipment are completed, and then the starting port and the end port are formed. At this time, the starting pit is a work pit formed at the beginning of the underground underground of the shoreline, and the reaching pit is the ending point of the shoreline underground and the drilling of the pilot hole by the directional press-fitting method starts again at that point. It is a working pit where the end is located.

The riverside and coastal underground formation step is to form an underground pipeline in the riverside and coastal soft ground, which is mainly composed of gravel and sand, soft and highly compressible clay, silt, and peat, etc. This is to ensure that it does not subside and persists. To this end, in the present invention, first, the first first underground pipe 110 at the starting port along the linearity determined through surveying is obliquely driven into the riverside and the soft ground along the coast. Then, the soil inside the first underground pipe 110 is dug up and emptied to provide a working space inside the first underground pipe 110 . And again, the second underground pipe 110 is closely attached to the rear of the second underground pipe 110, and the second underground pipe 110 is forcibly pushed using a press-fitting device to the first underground pipe 110 and the second underground pipe ( 110) is advanced. In this way, the empty first underground pipe 110 digs into the ground again and soil accumulates therein, and the worker enters the first underground pipe 110 through the second underground pipe 110 and enters the first underground pipe ( 110) By repeating sending the soil inside the second underground pipe 110 to the outside until the end of the riverside and coastal soft ground, the underground pipe 100 can be formed in the riverside and coastal soft ground.

After the underground pipe 100 is formed in the soft ground along the coast in this way, the inner pipe 120 is installed in the underground pipe 100 . The inner tube 120 serves as a kind of support for supporting the drill pipe and the hollow rod 16 to be described later so that they can be located in the inner center of the underground tube 100, and the inner tube 120 is a tube body having a certain length. is formed and flanges 120a are formed at both ends so that flange coupling between the continuous bundle tubes 120 can be made. In addition, the lower support legs 130 are formed on one side and the other lower portions of the inner tube 120, respectively, and the lower support legs 130 form a triangular shape that is opened to both sides. At this time, one side of the lower support leg 130 is integrally formed with a contact plate 130a formed in a curved surface along the inner diameter of the underground pipe 110 at the lower end, and the other lower support leg 130 has wheels 140 at the lower end. When one side of the inner tube 120 is lifted, the inner tube 120 is movable by the wheels 140, and when the lifted one side inner tube 120 is put down, the adhesion plate 130a formed at the lower end of the lower supporting leg 130 on one side is By the weight of the inner tube 120, it can be fixed and supported in close contact with the underground tube 110. Therefore, it has the advantage of being able to easily transport the inner tube and fix and support the inner tube in the underground tube at the same time.

In the excavation step, the drill pipe and the hollow rod 16 are continuously pushed into the underground pipeline 100 using the press-fitting equipment after arranging the press-fitting equipment on the side of the starting port. At this time, the drill pipe and the hollow rod 16 It enables it to be positioned and supported in the inner center of the underground pipe 100 by the accelerator pipe 120 . Then, the drill bit is mounted on the drill pipe at the tip, and the drill bit receives the rotational force and the excavation force from the press-fitting equipment and digs into the ground to excavate while moving along the designed path toward the destination. At this time, as the hollow rod 16 is continuously connected to the rear of the drill bit as shown in FIG. 5 , a pilot hole leading from the starting hole 18 to the arrival hole is formed.

When the drill bit arrives at the arrival port, the hollow rod 16 connected to the press-fitting equipment is reversed after replacing and mounting the drill bit with a reamer. The reamer is formed to form an expansion hole by increasing the inner diameter of the pilot hole while passing through the pilot hole from the arrival port to the starting hole side by receiving the rotational force and the expulsion force from the press-in equipment. At the same time, the pulling step is performed at the same time, and by connecting the buried pipe to be buried in the reamer, and pulling the buried pipe to the underground pipe 100 side by the reamer, the buried wooden joint in the underground pipe 100 is removed. will be able to install.

As described above, the present invention mainly consists of gravel and sand, soft and highly compressible clay, silt, and peat, etc., so it is practically impossible to use the directional press-fitting method. Since it is possible to install inside, it is possible to broaden the selective width of the installation of the pipe for the purpose of being buried using the directional indentation method, as well as to overcome the limitations of the application of the directional indentation method according to the characteristics of the ground. It will be possible to efficiently and economically supply water, sewage, electricity, communication, gas, etc.

In the above, the directional indentation method applied to the riverside and coastal soft ground according to the present invention has been specifically described, but this is only a description of the most preferred embodiment of the present invention, the present invention is not limited thereto, and the appended claims The scope is determined and limited by In addition, it will be clear that anyone with ordinary skill in the art can make various modifications and imitations according to the description of the specification of the present invention, but this is also not outside the scope of the present invention.

100: underground pipe 110: underground pipe
120: inner tube 120a: flange
130: lower support legs 130a: adhesion plate
140: wheel

Claims (2)

delete a pre-preparation step of preparing a measurement and alignment determination, related materials and equipment, etc. for laying underground pipes such as water and sewage pipes, power pipes, communication pipes, and gas pipes;
A pit forming step of forming a starting pit that is a working pit of the part where the underground of the coastline begins, and an arrival pit that is a working pit of the part where the underground ends including a section where the underground of the coastline ends;
Drive the first underground pipe at the starting port along the alignment determined through the survey, dig up the soil inside the first underground pipe and empty it to prepare a work space, then attach the second underground pipe to the first underground pipe again and install the equipment After forcibly pushing the 1st and 2nd underground pipes forward, sending the soil inside the 1st and 2nd underground pipes to the outside is repeated until the end of the coastal soft ground. A coastal underground pipeline forming step of forming a pipeline;
a sub-pipe installation step of fixing and supporting the sub-pipe to each underground pipe with a lower supporting leg so that the sub-pipe is positioned at the inner center of the coastal underground pipe;
After arranging the excavation equipment on the side of the starting port, the drill pipe and the hollow rod are continuously connected to the excavation equipment, but the drill pipe and the hollow rod are pushed in while passing through each inner tube inside the underground pipe and are connected to the drill pipe and an excavation step of forming a pilot hole from the end point of the soft ground along the shore to the arrival hole with the mounted drill bit;
When the drill bit arrives at the arrival port, the drill bit is replaced and mounted with a drilling machine, and then the hollow rod connected to the excavation equipment is reversed. Expansion and pulling steps to form a hole and connect the target pipe to the reamer so that the target pipe is pulled by the reamer to install the target pipe in the underground pipe; consists of,
The inner tube has flanges at both ends, and among the lower support legs at both ends, a contact plate forming a curved surface along the inner diameter of the inner tube is attached to the lower end of one lower support leg, and the lower end of the other lower support leg is attached to a wheel to lift one inner tube A directional press-in method applied to the riverside and coastal soft ground, characterized in that it is configured to move the inner pipe by means of wheels.

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