KR100690396B1 - An installation method of the drain pipe filter for collector wells using flexible hose - Google Patents

Abstract

An installation method of a filter around a perforated pipe of an underground water deep well using a flexible conveying pipe is provided to prevent the lowering in efficiency of water intake and to extend the service life of a deep well by making filtered underground water flow in through a conveying pipe. The installation method of a filter around a perforated pipe of an underground water deep well using a flexible conveying pipe comprises the steps of: installing a tug(21) to penetrate the outside, the front and the inside of a foremost perforated pipe(S11); connecting a perforated pipe(20) to the inside of a casing(30) while keeping the tug installed(S12); pulling a perforated pipe to the front of the perforated pipe by connecting a flexible conveying pipe(41) to the tug of the outside of the perforated pipe and pulling the tug of the inside of the perforated pipe(S13); injecting an admixture of particle filters(40) and water to the space between the casing and the perforated pipe through the conveying pipe, and pulling out the conveying pipe gradually to make the space between the casing and the perforated pipe fill up tightly with the filters(S20); and pulling out the casing after filling up with the filters(S30).

Description

An installation method of the drain pipe filter for collector wells using flexible hose}

1 is a representative cross-sectional view of a general water collecting well

Figure 2 is a conventional water collection well hole installation process diagram

Figure 3 is a conventional process of installing filter medium around the perforated pipe

4 is an explanatory diagram of the implementation of the present invention

5 is a representative cross-sectional view of the water collecting well constructed through the present invention

Figure 6 is a detailed view of the end portion of the perforated tube in the present invention

7 is a process diagram of the installation of the hole through the conventional large diameter casing

8 is an explanatory diagram of the main process of the present invention applied to the water collecting well of FIG.

<Code Description of Main Parts of Drawing>

10: sump crystal

19: caisson

20: perforated pipe

21: tow ship

22: pulley

30 casing

31: small diameter casing

32: large diameter casing

40: filter medium

41: pressure tube

42: pressure feeding device

43: blocking plate

49: injection pipe

S11: Towing Ship Installation Step

S12: hole insertion step

S13: pressure observing stage

S20: filter medium injection step

S30: Casing drawing step

The present invention is a method of forming a layer of sand or gravel filter medium around a horizontal perforated pipe of a radial water collection well, and includes a casing of a horizontally excavated excavation hole and a perforated pipe inserted into the casing. A flexible pressure feeder is put in between, and a filter medium mixed with water is injected through the pressure feeder to fill the space between the casing and the hole with a filter material, and the casing is drawn to draw the oil hole. It is to be able to form a surrounding filter medium layer.

1 is a large-scale groundwater intake facility in which a plurality of horizontal perforated pipes 20 are radially installed below the sump well 10, and the groundwater introduced through the perforated pipes 20 is collected in the sump well 10. It has a structure that is collected and pumped.

Such a water collecting well 10 is constructed through the same process as in FIG. 2, and the construction process is outlined as follows.

First, a caisson (19) is installed on the target ground and the caisson (19) is excavated to sink the caisson (19) to the target depth, and then the lower part of the caisson (19) constitutes the sump (10). .

When the main body of the sump 10 is completed, horizontal drilling is performed at a predetermined position under the sump 10, and a casing 30 is introduced at the same time as the excavation to maintain the empty wall.

When the excavation and insertion of the casing 30 to the planned point is completed, the perforated pipe 20 is inserted into the casing 30, and the casing 30 is drawn out, and the installation of the perforated pipe 20 is repeated in different directions. The radial sump 10 is completed.

As such, the conventional water collecting well 10 is a structure in which the perforated pipe 20 and the surrounding aquifer aquifer are directly in contact with each other. After the perforated pipe 20 is inserted into the casing 30, the casing 30 is formed. In the process of drawing, the surrounding ground is in direct contact with the outer circumferential surface of the perforated tube 20 by gravity and earth pressure, and then the obstruction of the through hole formed in the perforated tube 20 by the movement of the fine particles in the aquifer during the operation of the collecting well 10 is performed. It is caused to gradually reduce the water intake efficiency.

In order to solve this problem, as shown in Figure 3, between the casing 30 and the hole 20, a small injection pipe 49 is connected and inserted, using the injection pipe 49 casing (30) Injecting the filter medium 40, such as activated carbon or sand into the space between the hole and the hole 20, a construction method for forming a filter layer around the horizontal hole 20 is developed, but the injection of the filter medium 40 and At the same time, since the injection pipe 49 must be drawn out and disassembled, the work is complicated and takes a long time, and there is no limit to the inner diameter of the injection pipe 49, so that granules such as gravel There was a problem that is difficult to apply the filter medium 40.

In particular, in the process of drawing and disassembling the injection pipe 49, it is necessary to repeat the interruption and resumption of the pressurized filter medium 40, there was a serious problem that can not be forced to the related machinery.

The present invention has been made in view of the above-described problems, and a flexible pressure pipe is introduced between the casing of the horizontally excavated excavation hole and the inserted hole tube, and the filter medium such as gravel or sand mixed with water through the pressure pipe. By injecting, the space between the casing and the hole tube is filled with a filter medium, and then the casing is drawn to form a layer of filter medium surrounding the hole tube.

The pressure feed pipe is introduced to the end of the perforated pipe through the traction line, and then gradually draws out the filter material. Since the pressure feed pipe is flexible, no additional work such as disassembly of the pressure pipe between the injections of the filter material is necessary, and thus the work can be carried out without interruption of the pressure feed pipe. You can proceed.

In addition, a pulley (pulley) is installed at the front end of the perforated pipe to enable a smooth operation during the movement of the pressure pipe through the traction line.

The detailed configuration and implementation of the present invention will be described with reference to the accompanying drawings.

First, Figure 4 illustrates the overall process of the present invention, the present invention is directed to a radial water collecting well 10 is installed horizontal horizontal pipe 20, the process up to the horizontal excavation and casing (30) penetration and the conventional construction method Since it is the same, only the subsequent process is shown.

That is, as shown in FIG. 2, after the process of forming the water collecting well 10 body through the vertical excavation and settlement of the caisson 19 and the penetration of the casing 30 for the horizontal excavation and the maintenance of the hollow wall of the excavation hole are completed, By installing the filter medium 40 around the perforated tube 20 through the process shown in FIG. 4, the water collecting well 10 as shown in FIG. 5 is completed.

As can be seen from Figure 4, in the present invention, in order to fill the filter medium 40 in the space between the hole 20 and the casing 30, these hole 20 and casing 30 The flexible pressure feed pipe 41 is put in between, and the pressure feed pipe 41 is moved to the front-end | tip part of the perforation pipe 20 through the traction line 21. As shown in FIG.

As shown in the upper left of FIG. 4, the traction line 21 is installed to pass through the outside, the front end, and the inside of the hole 20 when the front hole 20 is inserted. When the insertion of the hole 20 is completed, By connecting the pressure feed pipe 41 to the pull line 21 outside the hole 20 and pulling the pull line 21 inside the hole 20, the pressure pipe 41 is pulled to the tip of the hole 20. .

When the injection of the pressure pipe (41) is completed through this process, the filter medium 40 is injected through the pressure pipe (41) and the pressure pipe (41) is gradually drawn out between the casing (30) and the perforated pipe (20). The space of the is compactly filled with the filter medium (40).

The filter medium 40 is made of a particulate water-permeable material such as sand or gravel, and mixed with a predetermined amount of water to be pumped into the pump pipe 41. A mixture of the injected filter medium 40 and water is In the process of filling the space between the casing 30 and the perforated tube 20, water is drained through the perforated tube 20 and the filter medium 40 remains, resulting in a layer of filter medium 40 surrounding the perforated tube 20. Will form.

The mixture of the filter medium 40 and the water is pressurized by the pressure feeding device 42 connected to the pressure feeding pipe 41 to be forcibly transferred and injected. In the accompanying drawings, the concrete pump car is illustrated as the pressure feeding device 42, but the fixed pump type is also fixed. Various pressurized conveying apparatuses can be applied regardless of the type of movement, and the present invention can be selected by a person having ordinary knowledge in the technical field to which the present invention pertains. .

When the filter medium 40 is filled, the casing 30 is drawn to complete the installation of the oil hole tube 20 and the filter medium 40.

As such, by forming the filter medium 40 layer around the perforated tube 20, the ground constituting the aquifer layer does not directly contact the perforated tube 20, as shown in FIG. 5, and the groundwater taken in is removed from the filter medium 40 layer. Since once passed through the perforated pipe 20, it is possible to ensure good water quality as well as preventing the clogging of the perforated pipe 20 by fine particles.

FIG. 6 illustrates a state in which pulleys 22 are installed at the tip of perforated pipes 20 to smoothly pull the pressure feed pipes 41. Not only can the efficiency be improved, but the accident such as the cutting of the traction line 21 can also be prevented.

On the other hand, Figure 7 is a method for installing the perforated pipe of the groundwater collecting well of the Patent Application No. 2006-101431 filed by the same person as the applicant of the present invention, large diameter through the connection and traction of the small-diameter casing 31 and the large-diameter casing 32 The installation process of the perforated pipe 20 is shown, the application of the present invention to the large-diameter casing 32 through the connection between the adjacent catchment 10 can be more quickly and effectively work.

That is, as shown in FIG. 8, by pulling the adjacent collecting well 10 at the time of the pulling of the pressure feeding pipe 41 through the pulling line 21, the feeding of the pressure feeding pipe 41 can be carried out quickly and stably. Since the casing 30 can be applied, it is possible to easily secure the space required for the use of the pressure feed pipe 41 and the filling of the filter medium 40.

In the installation of the perforated pipe 20 and the filter medium 40 through linkage with the adjacent collection basin 10, by applying the blocking plate 43 as illustrated at the lower left of FIG. 8, the injected filter medium 40 is It is desirable not to leak into the sump 10.

As a result, the technical gist of the present invention is to insert the perforated pipe 20 into the casing 30 after the horizontal perforation of the water collecting well 10 and the penetration of the casing 30. In the construction method of the groundwater sump (10) for installing the filter medium 40 around the perforated pipe, the traction ship installation step of installing a traction ship 21 to pass through the outside, the front end and the inside of the front forehole pipe 20 ( S11 and the hole hole insertion step (S12) for connecting and inserting the hole hole 20 into the casing 30 while maintaining the installation state of the traction line 21, and the hole hole 20 when the insertion of the hole hole 20 is completed. Towing the pressure feeder 41 to the tip of the hole 20 by connecting the flexible pressure feeder 41 to the external traction line 21 and pulling the traction line 21 inside the oil hole 20. When a mixture of the particulate filter medium 40 and water is injected between the casing 30 and the perforated pipe 20 through the pressure feed traction step S13 and the pressure feed pipe 41. Flexible filter characterized in that it comprises a filter medium injection step (S20) for drawing the pressure feed pipe (41), and a casing drawing step (S30) for drawing the casing 30 so that the filter medium 40 in contact with the surrounding ground Filter material installation method around the perforated pipe of the groundwater collecting well using a pressure pipe, a pulley (22) is installed at the tip of the foremost perforated pipe 20 around the perforated pipe of the groundwater collecting well using a flexible pressure pipe Filter media installation method.

Through the present invention, by allowing the groundwater filtered through the filter medium to be introduced through the oil hole pipe, it is possible to prevent the oil hole pipe from being blocked and the water collection efficiency of the water collection well is lowered, further extending the life of the water collection well.

Claims (2)

After perforation of the bottom of the water collecting well (10) and penetration of the casing (30), a hole (20) is inserted into the casing (30), and the filter medium (40) around the perforated pipe. In the construction method of the groundwater sump (10) to install the A traction ship installation step (S11) for installing the traction ship 21 so as to pass through the outside, the front end, and the inside of the frontmost hole 20; A hole hole insertion step (S12) for connecting and inserting the hole hole 20 into the casing 30 while maintaining the installation state of the traction line 21; When the insertion of the perforated pipe 20 is completed by connecting the flexible pressure feed pipe 41 to the pull line 21 outside the perforated pipe 20 and by pulling the pull line 21 inside the perforated pipe 20 A pressure feed traction step (S13) for pulling the pressure pipe 41 to the distal end of the air pipe 20; Filter material injection step of drawing the pressure pipe (41) while injecting a mixture of particulate filter medium (40) and water through the pressure pipe (41) between the casing 30 and the hole tube 20 ( S20); Filtering method for installing the periphery of the perforated pipe of the groundwater collecting well using a flexible pressure pipe, characterized in that it comprises a casing drawing step (S30) to draw the casing 30 so that the filter medium 40 is in contact with the surrounding ground. The method of claim 1, wherein a pulley (22) is installed at the tip of the frontmost hole (20) to install a filter material around the perforated pipe of the groundwater collecting well using a flexible pressure pipe.

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