JPH018583Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a method for confirming the remaining position of drain material in the ground in the drain construction method implemented to promote drainage and consolidation of soft ground, especially the paper drain construction method, and its method. The present invention relates to the drain material used in the apparatus for carrying out the method.

Problems that the invention aims to solve In the conventional paper drain construction method, paper drain material is driven into the ground along a mandrel, and then the mandrel is pulled out.
A phenomenon in which the paper drain material was lifted up with the mandrel due to earth pressure, water pressure, etc. was observed, and the expected drain effect was sometimes not produced. In that case, it is necessary to recast the paper drain material. Therefore, we accurately confirm the remaining position of paper drain material in the ground, and paper drain material may be brought up when the mandrel is first pulled out or during the mandrel being pulled out, so check for each case. There is a need to.

Therefore, in view of the above-mentioned circumstances, the inventor has developed a method and device for confirming the remaining position of the drain material in the drain construction method, which makes it possible to accurately confirm the position of the paper drain material in the ground and check the reliability of construction. Inventing.

The present invention relates to a drain material used in the above-mentioned confirmation method, and its purpose is to provide a drain material with a detected part that can be reliably detected by the detection part of the mandrel at a low cost and in large quantities. It is something to do.

Structure of the invention In the drain construction method according to the invention, the drain material with the detected part is formed by forming the detection part on the mandrel, forming the detected part on the drain material, and lowering the drain material into the ground to a required depth by the mandrel. It is a drain material in a drain construction method in which the mandrel is driven in, the mandrel is pulled out, the drain material is left in the ground, and the position of the detected part can be confirmed by the detection part, and the detected part of the drain material is this It is composed of small display bands provided at predetermined intervals on a core body and/or a filter layer constituting the drain material.

Embodiments Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a schematic diagram showing an apparatus in which the detected portion 1 can be formed by magnetizing means.

Referring to FIG. 1, the paper drain A includes a core body 2 and a pair of filter layers 3, 3 that sandwich the core body 2. As shown in FIG.

First, as an embodiment of the magnetizing means, filter layers 3, 3 which have been made magnetic in the process of producing the filter layer structure are attached to the front and back surfaces of the core body 2, and then In the process, the filter layer 3,
3 is considered to be magnetized.

In the second embodiment, a magnetic material spraying device C is arranged in the next step after attaching a pair of filter layers 3, 3 to the core body 2, and this magnetic material spraying device C applies magnetic powder to the filter layer 3. It is made into a magnetic material by spraying (see Figure 1). Thereafter, it is conceivable that the filter layer 3 is magnetized at predetermined intervals by the magnetizing device B to form the detected portion 1 as in the first embodiment.

Therefore, FIGS. 2a and 2c are schematic diagrams showing the filter layer 3 which has been made into a magnetic material by mixing magnetic powder 4 or magnetic filament 5 into the filter layer structure in advance, and FIG. 2b is a schematic view of the filter layer 3. FIG. 3 is a schematic diagram showing a filter layer 3 made into a magnetic material by spraying magnetic powder 4 onto the surface thereof.

In addition, in the third embodiment, the core 2 is made magnetic by mixing magnetic powder 4 into the core 2 in advance (see Figure 2 d) or inserting a magnetic wire 6 (Figure 2 e).
The core bodies 2 are magnetized at predetermined intervals by the magnetizing device B to form the detected parts 1.

Next, in the fourth embodiment, a magnetic wire 6 is inserted into the core body 2 using a magnetic wire inserter D to form a magnetic core body 2 (FIG. 2f), and then a filter layer 3, 3 is attached thereto, and the core body 2 is magnetized at predetermined intervals by a magnetizing device B, thereby forming the detected portion 1.

3a, b, and c show an embodiment in which a slitter 7 is formed in the longitudinal direction of the paper drain A, and the slitter 7 is used as the detected part 1.

The method for forming this slitter 7 is to extrude the core body structure 9 using an extruder head 8, then shape the core body 2 using forming rolls 10, 10, and apply the filter layers 3, 3 to the core body 9. In the next step of the bonding step E, which is attached to both sides of the slitter forming rolls 11, 11 made of hard rubber rolls,
It is conceivable to form the slitters 7 on the paper drain A using slitter forming jigs 12 provided on the outer peripheral surface of the slitter forming roll 11.

Therefore, the slitters 7 are detected by a mechanically formed detection section.

Next, FIGS. 4A, 4B, and 4C show an embodiment in which a punched portion 13 or a cutout portion 14 is formed in the paper drain A to form the detected portion 1. As shown in FIG. 4a, a cutting device 15 is disposed after the bonding step E, and the cutting device 15 forms a punched portion 13 or a cutout portion 14 in the paper drain A, thereby forming the detected portion 1 and the cutting device 15. This is what I did.

In FIG. 5, the detected part 1 is provided with display means such as printing. That is, if there is no risk of water entering the detection area formed in the mandrel, the mark 16 is formed by prior painting or printing on the surface of the filter layer 3, and the detection area 1 is
That is. Alternatively, the mark 16 is formed by painting or printing in a step after the completion of the paper drain A, and the mark 16 is used as the detected part 1.

In this case, as the detection section of the mandrel, a photoelectric sensor capable of detecting brightness or a mark sensor capable of discriminating color may be used.

As described above, the detected portion 1 is a small display band provided at a predetermined interval on the core and/or filter layer constituting the drain material by magnetizing means, cutting means, printing or other display means. However, if the detected part 1 is formed by magnetizing means as shown in FIGS. 1 and 2, it is relatively easy to form the detected part 1 in the production process of the paper drain A. The detected portion 1 can be formed accurately without causing omissions or variations in pitch.

Further, when the detected part 1 is formed by cutting means as shown in Figs. 3 to 4, there is no need to form the detected part 1 with a special structure, and a contact switch can also be used as the detecting part. etc., and the detection unit can be simplified.

Effects of the invention Thus, the present invention has the above-mentioned configuration, and if the drain material is equipped with the detected part according to the present invention, the mandrel used when carrying out the drain construction method is equipped with the detection part, and the drain material is equipped with the above-mentioned detection part. Since it is equipped with various detected parts, it has the advantage that the necessary signals can be reliably and easily detected as the mandrel is pulled up, and that it can be reliably and quickly confirmed that the drain material is in a predetermined position.

Moreover, the drain material provided with the detected portion according to the present invention can be provided to the market at low cost and in large quantities.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a system for forming a detected part on a paper drain by magnetizing means;
Figures a, b, c, d, e, and f are schematic diagrams showing a magnetic filter layer or core; Figure 3 a is a schematic perspective view showing a state in which a slitter is formed;
Figures b and c are schematic diagrams showing how the slitter is formed;
FIG. 4a is a schematic diagram showing a system for forming a detected part by a cutting means, FIGS. 4b and 4c are schematic perspective views of a state in which a detected part is formed by a punched part and a notch part, FIG. 5 is a schematic perspective view of a state in which a detected portion is formed by a display means. A... Paper drain, B... Magnetizing device, C
...Magnetic material spraying device, D...Magnetic wire inserter, E...Binding process, 1...Detected part, 2...Core, 3...Filter layer, 4...Magnetic powder, 5...
Magnetic filament, 6... Magnetic wire, 7...
Slitter, 8... Extruder head, 9... Core body structure, 10... Forming roll, 11... Slitter forming roll, 12... Slitter forming jig, 1
3... Punching part, 14... Notch part, 15... Cutting device, 16... Mark.

Claims (1)

[Claims for Utility Model Registration] A detection part is formed on a mandrel, a detected part is formed on a drain material, the drain material is driven into the ground to a required depth by the mandrel, and the mandrel is pulled out to place the drain material into the ground. This is a drain material in a drain construction method in which the position of the detected part can be confirmed by the detection part while remaining in the drain material, and the detected part of the drain material is a core body and/or a filter constituting the drain material. 1. A drain material having a detected part in a drain construction method, characterized in that it is composed of small display bands provided at predetermined intervals in a layer.