JPS5921887A - Inserting method into boring hole of flexible thin-film tube - Google Patents

Abstract

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

Description

Detailed Description of the Invention (I) Background Technical Field of the Invention The present invention involves inserting a flexible transparent thin film tube into a poling hole, and injecting clean water into the tube to expand the tube. Replacing polluted water with fresh water 1- A method for inserting a flexible thin film tube into a polling hole, which is suitably adopted for the method of inserting a borehole television camera or a borehole video camera into the tube to observe the hole wall surface of the polling hole. Regarding.

Prior art and its problems As shown in FIG. 1, a polling hole observation device 2 equipped with a borehole television camera, lighting, a reflector, etc. inside the bent portion is inserted into a polling hole 1 using a hoisting machine 3. A method for observing the wall surface of a polling hole 1 has been proposed, in which the hole wall surface 6 of the polling hole 1 is photographed and recorded using a monitor television 4 and a video tape recorder 5 (on the ground), and successful examples thereof have been reported.

So) 9. According to their report, imaging of the hole wall surface is possible only when groundwater is sucked into the ground and accumulates in the poling hole, or when the water that accumulates in the poling hole has extremely high transparency. If the water in the polling hole is turbid, the image will be unclear, and if the degree of turbidity is high, it will be completely impossible to photograph the hole wall. Pore water contamination is caused by the dissolution of slime (boring debris) and the hole wall, as well as polling slurry such as bentonite and plaster used during drilling. In this case, a sufficient effect cannot be obtained in removing contamination of borehole water. Therefore, it was desirable to develop a technology to completely remove pollution from the borehole water.

In view of the above circumstances, a related group of the present inventor developed a method for replacing polluted water in a borehole with fresh water as shown in Figure 2, and the present inventor has effectively implemented the method for replacing polluted water in a borehole with fresh water. As a related technology, we have devised a method for inserting a flexible thin film tube into a poling hole.

To briefly explain the method of replacing polluted water in a hole with fresh water as shown in FIG. 2, first, as shown in FIG. 200wn L 300mm
) A small hole 7 a + 7 a +... The open drainage hose (e.g. outer diameter], Omm) 7 and the insertion tip are closed, and the flexible hose is unexpanded and crushed so that no air remains inside. The flexible transparent thin film tube 8 is inserted into the flexible transparent thin film tube 8 using weights 9 and 10, respectively, and then, as shown in FIG. This is a method in which the expanding portion is expanded by hydrostatic pressure toward the lower part, and the polluted water inside the hole is discharged into the pond through the drainage hose 7. However, the second
As shown in Figure (c) K, the borehole television camera 2 is inserted into the flexible transparent thin film tube 8 expanded by fresh water injection. For example, since the tube 8 is in close contact with the hole wall surface, the hole wall surface can be clearly observed. In addition, the polling hole 1 is preliminarily pumped with clean water to remove bentonite and the like adhering to the hole wall surface, and then using a dummy from the hole wall surface observation device, it is confirmed whether the dummy can be inserted into the bottom reed of the polling hole 1. - Leave it as -.

However, in the above-mentioned method for replacing polluted water in the hole with fresh water,
ffi is extremely deep, so the flexible thin-film tube may become twisted during insertion, and this cannot be corrected from above ground. The area below the twisted part of the tube cannot be expanded and therefore cannot be observed.

■ Because the resistance between the flexible thin film tube and the hole wall is large, when inserting the tube into the polling hole using a weight of /JS from step 1, the insertion may stop midway and be removed. Insert the tube into the polling hole using a heavy weight! - However, it is difficult to recover the tube afterwards.

■ Since the flexible thin film tube is made of thick plastic film such as 005, the tube is simply crushed without expansion. When inserted, there is a possibility that the tube will not expand due to friction with the hole wall, and even if fresh water is poured into the tube, there is a risk that the tube will not expand. There is a risk that contaminated water may enter the hole through the frayed hole.

The problem was discovered.

(,]T) Purpose of the Invention The present invention was devised in view of the above-mentioned points, and is a technology directly related to effectively implementing the method for replacing polluted water in a hole with fresh water. There is no twisting when inserted into the poling hole, and the insertion resistance of the flexible thin film tube into the poling hole is low, and the light weight allows for effective tube insertion, making it easy to retrieve the tube afterward, and preventing fraying due to friction with the hole wall. The present invention provides a method for inserting a flexible thin film tube into a polling hole in which no holes are formed and there is no fear that polluted water may enter the tube.

According to the present invention, this purpose is achieved by inserting a flexible glandular guide of a certain thickness that has a guiding function into the polling hole having polluted water inside the hole, suspending it from the ground, and then inserting the linear guide into the polling hole. A flexible thin film is provided on the ground and is unexpanded and flattened, except for internal air that can come into close contact with the wall surface of the poling hole on the entire circumference. Lock the lower end of the tube [7. Fold the flexible thin film tube in the width direction so that the diameter of the polling hole becomes smaller (and insert the flexible thin film tube into the polling hole with a weight) This is achieved by a method of inserting a flexible thin film tube into a polling hole, which is characterized by hanging down from the ground.

That is, in the present invention, first, a linear guide is inserted into a polling hole and suspended from the ground, and using this as a guide, a flexible thin film tube is inserted into the polling hole and suspended from the ground. In order to prevent the flexible thin film tube from rubbing strongly against the wall surface of the hole, the flexible thin film tube is folded in the width direction to an appropriate width smaller than the diameter of the poling hole, and then inserted.

In the present invention, the specific shape of the tube guide is not particularly limited, and there are no particular limitations on how it is fitted to the linear guide. For example, the tube guide may be made by fixing a short tube whose inner diameter is slightly larger than the outer diameter of the linear guide to one end of a metal rod-shaped part, or by attaching a linear guide to one end of the rod-shaped part. It may also have a pair of rollers that pinch and roll. Further, the linear guide may be made of any flexible material, and although it is preferable to use a drainage hose used in the above-described method of replacing polluted water in a hole with fresh water, it may be installed separately from the drainage hose. For example, a steel rod is not suitable as the linear guide. The reason for this is that after observing the hole wall surface, it becomes difficult to take out long and heavy steel rods to the ground. This is because the steel rod does not move so as to come into close contact with the hole wall surface during expansion, making it difficult for the tube to expand well, and having flexibility is a necessary limiting condition for the linear guide. The linear guide is attached to the urethane pipe.
It is preferable to use a drainage hose with small holes at a pitch of 0.00 to 300 tran.

It is particularly preferable to make the linear guide made of urethane because the tube guide that engages in the sleeve shape can smoothly descend relative to the linear guide. The polling hole is usually 100 mm in diameter.
++s It is sufficient to use one drain hose used for the method of replacing polluted water inside the hole with fresh water, with an outside diameter of 10, but if the diameter of the polling hole is between 300 and 1
000 m, etc., it is effective to use two or more drainage hoses to discharge polluted water from the hole. In this case, when the drainage hose is the linear guide of the present invention, one It is preferable to select hoses.The reason for this is, for example, when two drainage hoses are inserted from the ground into a boring hole with a depth of 200 cm [7] When hanging down, the two drainage hoses may be twisted in the middle. Therefore, if two drainage hoses are used as a linear guide, there is a risk that the flexible thin film tube may also be twisted and inserted.

Further, in the present invention, the weight may be attached to a flexible thin film tube or to a tube guide. The tube guide may serve as a weight, or a sand bag may serve as a weight.

Further, the present invention does not deal with the method of inserting the linear guide into the polling hole, but may insert the linear guide without using a weight as long as it can be inserted smoothly by its own weight.

The present invention is limited to the method of inserting an unexpanded, pressed flexible thin film tube having a diameter that fits tightly around the entire circumference of the inner wall of the poling hole.

When fresh water is injected into the inside of the polling hole after the tube is inserted, even if a flexible thin film tube with a small circumference that does not come into close contact with the inner wall of the polling hole is inserted into the polling hole, the above-mentioned method of replacing polluted water inside the hole with fresh water cannot be achieved. This is because observation of the borehole wall surface using the borehole television camera becomes impossible or poor.

However, the flexible thin film tube to be inserted in the present invention may be one whose insertion tip is not closed. The reason for this is that the flexible thin film tube is in an uninflated state (excluding internal air), or in a flattened state, and is inserted into the polling hole after being locked in the tube guide. Even if the inserted tip of the thin film tube is not closed together, the polluted water inside the hole will not enter the tube during insertion, and when fresh water is completely injected, the tube will expand to the bottom end and the bottom end of the tube will open and the polluted water inside the hole will flow out. This is because even if it does enter, the amount is small and does not have a negative effect on the clarity of fresh water.

However, in the present invention, it is preferable that the lower end of the flexible thin film tube is closed. This is because the method of removing the flexible thin film tube from the poling hole after observing the hole wall surface requires that the lower end of the flexible thin film tube be closed. That is, after observing the hole wall surface, a steel pipe is inserted from the ground, the tip of the pipe pierces the lower end of the flexible thin film tube, and muddy water such as bentonite with a high specific gravity is poured from the bottom of the thin film tube to the outer periphery of the thin film tube from the ground through the thin film tube. The flexible thin film tube can be taken out from the ground by feeding pressure and buoyancy, but if the lower end of the flexible thin film tube is not closed, it will not be fed into the bottom of the poling hole from the steel pipe. This is because the muddy water flowing into the flexible thin-film tube does not push up the flexible thin-film tube, but only causes the fresh water inside the tube to overflow to the ground.

Further, in the present invention, a non-transparent flexible thin film tube is also inserted. Although it is essential that the flexible thin film tube be transparent for observation of the hole wall surface, the inclusion of a non-transparent tube in the method of the present invention as an insertion object is a possibility in certain industrial technologies that may be used in the future. It is also intended to include methods for inserting flexible membrane tubes.

(m) Preferred embodiment of the present invention As shown in FIG. 3, the method of inserting the flexible thin film tube of the present invention into the polling hole is to insert the drain hose 7 into the polling hole 1 so that it reaches the bottom of the polling hole. "Ground": drooping more,
A tube guide 11 is engaged on the ground using the drain hose 7 as a linear guide, and a flexible transparent thin film tube 8 is engaged with the tube guide 11 and inserted into the polling hole 1.

The diameter of the polling hole 1 of the drain hose 7 is, for example, 10 mm.
When it is 0m+n, use a urethane pipe with an outer diameter of 10mm and drill small holes at a pitch of 200wn to 300mm, attach a weight 9 to the lower end, and insert it into the polling hole 1 using a hoisting machine etc. .

The tube guide 11 that engages with the drain hose 7 is a short tube whose inner diameter is slightly larger than that of the drain hose 7, and a rod-shaped member with a diameter of 1/3 of the polling hole or the length of the stirrup in a direction perpendicular to the axis of the short tube (lζ The short tube part is fitted into the drain hose 7 on the ground, and the other end of the rod-shaped part of the tube guide 11 is fitted with a transparent plastic film or the like. A flexible thin film tube 8 whose insertion tip is closed and has a circumferential length equal to the inner circumferential length of the polling hole is tied with a string or the like, and further equipped with a weight 10 and inserted into the polling hole 1 (7 When the flexible thin film tube 8 is inserted, the flexible thin film tube 8 is further expanded from the uninflated and crushed state with the internal air removed, as shown in FIG. 4(a)K. Figure 4(b)
(c) As shown in (d), the flexible thin film tube 8 is pre-folded into a 9-fold IJ-ru so that it is kept folded in the width direction to a width smaller than the diameter of the poling hole. Wrap it around and tie it up. After being folded in this way, the flexible thin film tube is inserted into the poling hole 1 as shown in FIG. 5, for example.

(IV) Specific Effects of the Invention As explained above, the method for inserting the flexible thin film tube of the present invention into the poling hole is to insert the linear guide into the bore hole from the ground. Insert the flexible thin film tube using a weight to guide it [7-fold configuration, so
When the flexible thin film tube is inserted deep into the poling hole without twisting, and fresh water is injected into the flexible thin film tube from the ground, the lower part of the flexible tube cannot expand from the middle. Therefore, it can be suitably implemented in a method of replacing polluted water in a hole with fresh water using a flexible thin film tube.

In addition, the method of inserting a flexible thin film tube into a polling hole according to the present invention involves folding the flexible thin film tube from an uninflated and crushed state excluding internal air so that the width direction becomes smaller than the diameter of the polling hole. Since the flexible thin film tube is inserted into the poling hole while being in an open state, the flexible thin film tube is inserted without strongly rubbing against the hole wall surface of the polling hole, and the outer surface of the tube becomes dirty due to contact with the hole wall surface. It is very suitable for observing the hole wall surface because it leaves a small and completely uncontaminated part, and since the flexible thin film tube does not rub strongly against the hole wall surface of the poling hole, it is possible to make the weight smaller, and in turn, After observation, a liquid with a large specific gravity is sent in, and the buoyancy makes it easy to take out the flexible thin film tube to the ground (so that it is easy to take out the flexible thin film tube to the ground). There is no risk that the polluted water in the hole will enter the tube 17 and pollute the fresh water.

In addition, as an embodiment of the present invention, when the drainage hose for discharging polluted water in the polling hole to the ground also serves as a linear guide, compared to the case where a linear guide is hung down in addition to the drainage hose. This is advantageous in materials and construction processes, and the flexible thin film tube can be more easily inserted into the poling hole.

Furthermore, in embodiment 1- of the present invention, if the linear guide is made of urethane material (if the linear guide is made of urethane material, then the friction with the tube guide is small and the tube guide can be guided smoothly, and therefore the flexible thin film tube can be inserted into the poling hole). It can be guided well to the bottom.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a polling hole during observation work, showing a conventional method for observing the wall surface of a polling hole, and Figures 2 (a) (b)
) (c) is an explanatory process diagram of a newly developed method for replacing polluted water in a hole with fresh water, in which the method of inserting a flexible thin film tube into a polling hole according to the present invention is suitable, and FIG. FIG. 4 is a cross-sectional view of the flexible thin-film tube illustrating the method of inserting the flexible thin-film tube into the polling hole, and FIG. Fig. 5 shows the collapsed state, (b), (c) and (d) are cross-sectional views showing the state in which the width direction is further folded from the state of Fig. 5 (a), and Fig. 5 shows the state in which the flexible tube is inserted. FIG. 1... Polling hole, 7... Drain hose; Linear guide, 8... Flexible thin film tube, ] 0... Weight, 1
1...Tube guide. Figure 1 Figure 2 <a><'o) ((:) Figure 3
Figure 4

Claims (1)

[Claims] 1. After inserting a flexible linear guide having a certain thickness and having a guiding function into a polling hole having polluted water inside the hole and suspending it from the ground, the polling hole is inserted into the linear guide. A flexible thin film is provided on the ground and is unexpanded and flattened, except for the internal air that can be brought into close contact with the wall surface of the poling hole all around the tube guide. Lock the lower end of the tube, fold the flexible thin film tube in the width direction so that the diameter of the polling hole becomes smaller, and insert the flexible thin film tube into the polling hole using a weight. A method for inserting a flexible thin film tube into a polling hole, which is characterized by hanging from the ground. 2. The method for inserting a flexible thin film tube into a polling hole according to claim 1, wherein the linear guide is a drainage hose that discharges polluted water in the polling hole to the ground. 38. The method for inserting a flexible thin film tube into a poling hole according to claim 1 or 2, wherein the linear guide is made of urethane material.