JP3300799B2 - Terminal mounting method to steel pipe buried in deep soil and jig used directly for implementation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a terminal on a bare steel pipe buried in a deep soil or a steel pipe provided with anticorrosion coating, and a jig directly used for carrying out the method.

[0002]

2. Description of the Related Art Normally, trunk pipes such as water pipes buried in the soil are made of large-diameter steel pipes provided with anticorrosion coating.
Many of the existing pipelines are not provided with cathodic protection.
In addition, a flexible telescopic tube made of an insulating material is interposed in the pipe to release stress, and the pipe is electrically insulated. In order to provide such a conduit with cathodic protection, it is necessary to attach a terminal and provide electric bonding at a flexible telescopic tube.

[0003] In addition to the purpose of cathodic protection, it may be necessary to install a terminal for investigating and inspecting such buried pipes. Conventionally, access to the pipe surface buried in the soil for terminal installation is performed by excavation, and since it is not possible to excavate at all seams with electrical bonds, the water in the pipe is drained and entered into the pipe. A worker has made an intra-tube bond between the tubes on both sides of the flexible telescopic tube.

[0004]

The above-mentioned operation for mounting the terminal when the depth is relatively shallow is not a problem, but it is possible to use a GL-10m to -20m, a large-diameter water pipe having a pipe diameter of 1,000 mmφ or more. If digging is performed at a high depth, for example, when a cathodic protection terminal is installed, (a) civil engineering costs will be greater than cathodic protection costs. (B) The construction period of civil engineering is long, and it is necessary to occupy a considerable amount of space for the construction. And other problems.

[0005] Further, regarding the electric bond, (a) there is a case where the water in the pipeline cannot be stopped. (B) Even when water can be stopped, it is necessary to select a winter season when water demand is low, and to formulate a water supply plan using other routes. (C) There is a water control valve at an appropriate position to stop water,
There must be human holes. (D) Since the discharge water in the pipe requires chemical injection treatment, it is indispensable to secure a space for chemical injection treatment and a discharge route. (E) After draining, sufficient ventilation and lighting are required because people enter the pipes to work. (F) In the pipe bond, damage to the pipe coating cannot be avoided by welding. And so on.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method of attaching a terminal to a bare steel pipe buried in a deep soil or a steel pipe provided with anticorrosion coating. It is to provide a jig to be directly used for implementing the method.

[0007]

Means for Solving the Problems In order to achieve the above object, a method of mounting a terminal on a steel pipe provided with anticorrosion coating for deep underground burial according to the present invention comprises the following steps: Accurate positioning of the center of the top of the buried steel pipe. (B) Drilling near the top of the buried steel pipe by boring. (C) A drilling that reaches the top of the buried steel pipe with a bit that does not damage the buried steel pipe. (D) Confirmation of the top of the buried steel pipe. (E) Various cutting and resilient functions to be attached to the rod tip of the boring machine, coating and peeling off the top surface of the buried steel pipe with an attachment for polishing, and pipe surface polishing. (F) A cushion seal is put on the lower end, and the suspended casing comes into contact with the coating stripping portion and removes slime in the casing, solidifies the casing, pumps water in the casing, and removes residual moisture. Removal. (G) Drop-in loading with a terminal board with lead wires or a stud instead of it attached to the rod end of a boring machine. (H) The terminal plate or stud is fixed to the top of the buried steel pipe. (I) Resin filling for repairing the coating of the stripped coating covering part by bringing the resin filling hose into the terminal or stud part. (Nu) Backfill inside and outside the casing. It consists of the above steps.

[0008]

[Function] The center of the rod of the boring machine is secured by the attached stabilizer, so the rod end acts resiliently, which is frequently replaced, to peel off the coating, and also requires various polishing attachments. It works with elasticity without damaging the steel pipe surface at the same location.

Further, the access passage is formed by the lower mounting of the terminal plate or the stud through the rise of the casing, and the mounting is realized in which the remote cutting and the in-pipe bonding are completely unnecessary from the ground. Access to the buried steel pipes requires only a small space for drilling holes and eliminates the difficulties in space and cost.

[0010] Bonding by welding with a tikaweld or a stud outside the tube is preferable because the coating film inside the tube is hardly damaged.

[0011]

Embodiments of the present invention will be described. (A ') As shown in FIG. 1, a pipe center axis 2 of a steel pipe 1 buried at a high depth is set out with a stud 3 and 3' by a drawing survey, a field survey, and surveying, and a terminal installation point 4 on the center axis 2 is provided.
Is marked with a stud 5, 5 '. Check pipe 1 level and ground level.

[0012] As shown in FIG.
Is determined by the studs A, A ', B, B' and a boring preparation work for installing the mouth pipe 6 as shown in FIG. (B ') Boring is performed by using a bit of a brate type or the like. (C ′) After excavating to 0.5 to 1.0 m above the steel pipe 1, as shown in FIG. 3, the steel pipe 1 is replaced with a hard vinyl chloride bit 7 so as not to damage the steel pipe 1 until the steel pipe 1 is reached. In the figures, 8 and 9 indicate cutting blades, and 10 indicates a stabilizer. (D ') Confirm whether the reaching point is the top of the steel pipe 1 or not.
A clay layer 13 is attached to the lower surface of the plate 11 shown in FIG.
Is performed by pressing and deforming the impression block 15 which is fixed. Of course, the rod is lowered without rotation.

In the illustrated example, the clay layer 13 is fixed to the lower surface of the plate 11 (made of iron) via a wooden thick plate 12 with the nails 14 as anchors. May be fixed to the plate 11 with an adhesive without an intervening material, or a band around the boundary between the plate 11 and the clay layer 13 may be fastened with a band. (E ') The peeling of the tube coating is first performed through a mild steel blade which is in elastic contact.

That is, as shown in FIG. 5, a cylindrical box 18 having a top plate 16 and a bottom plate 17 is divided into upper and lower chambers 20 and 21 by a partition wall 19. A slide plate 23 having a pair of rod joints 24 is provided therein,
Project from the central opening 25 of the top plate 16. on the other hand,
The lower chamber 21 has a spring 26 and a longer mild steel blade edge 28 around the lower surface for receiving the spring 26, and a shorter mild steel blade 28 at the center.
A slide plate 27 having a protrusion 29 is provided therein, and the cutting edges 28 and 29 protrude from a peripheral opening 30 and a central opening 31 of the bottom plate 17.

Each of the slide plates 23, 27 is assembled by fitting concave grooves 33,... Provided on the periphery with vertical guide rails 32,. It is. Thus, the rotation of the rod is transmitted to the box 18 via the slide plate 23 and further to the slide plate 27, and the descending force becomes resilient due to the interposition of the springs 22 and 26. Therefore,
Due to the resilient pressing rotation of the mild steel cutting edges 28 and 29, as shown in FIG. 6, the coating 34 made of glass cloth, asphalt, etc. of the steel pipe 1 is cut into a deep circumferential locus cut 35 having a peeled outer edge and a central portion. Rough cutting is performed with a circular incision 36 having a small depth.

Next, for the center cutting part, FIG.
In the box 18 shown in FIG. 7, instead of the slide plate 27, a joint 37 for attaching an attachment is provided at the center of the lower surface.
The slide plate 38 provided with the inside is provided, and the spring 37 is provided with the joint 37 protruding from the central opening of the bottom plate 17. A cutting is performed by connecting a pick bit 42 provided with a joint 41 to the top end. The pick bit 42 attached to the spring head H receives a downward force acting on the rod in a manner similar to that of the cutting edges 28 and 29, such as rotation and repulsion. This completes the rough cutting in which the background of the coating 34 is exposed.

Next, instead of the pick bit 42, the spring head H is connected to a frame 44 having a joint 43 shown in FIG. Preparatory peeling is performed. It is the same as the pick bit 42 that receives the descending force acting on the rod from the rod.

The material of the crown 45 is not limited to plastic, and any material that does not damage the steel pipe, such as hard rubber, ceramic, or wood, can be appropriately selected and used. Further, instead of the crown body 46, a short cylindrical body 51 on which a metal brush 50 is brushed is taken out to a bottom plate 49 of a steel box 48 having a joint 47 shown in FIG. With the spring 53 interposed, the disengagement is prevented, and the wire brush head 54 hung densely on the circumferential trajectory is connected and acted to perform strong finishing polishing.

The mounting base of the brush 50 in the illustrated example is formed as a box 48 in order to secure the retreat of the shaft 52 in the box 48 as a spacer. However, since there is no intrusion of earth and sand into this portion. Instead of the box frame, the ceiling having the joint 47 and the bottom plate 49 may be connected to each other by equally disposing the columns. It is needless to say that, similarly to the pick bid 42 and the crown body 46, the rod receives a descending force acting on the rod in a revolving and resilient manner.

FIG. 11 shows a polishing operation mode and the like by the wire brush head 54. In the figure, 66 is a boring hole, 72 is a boring machine, and 73 is a rod. In each of the above jigs, if the springs 26, 53, etc., which repel the members directly acting on the lower processing surface, are set stronger than the upper springs 22, etc.
This is preferable because the repelling action on the surface to be processed is reliably ensured.

Instead of the coated rough cutting jig shown in FIG. 5 and the spring head shown in FIG. 7, a top plate and a guide suspended coaxially with the rod joint are fixed to the bottom of the rod joint. A sliding plate is mounted below the guide so as to be vertically movable with respect to the guide shaft and rotates synchronously with the guide, an elastic body is interposed between the top plate and the sliding plate, and a lower surface of the sliding plate. Rough cutting, scraping-type peeling, paint wiping using a spring head attached to the rod end of a boring machine to which the attachment for the pipe surface polishing or pipe surface cleaning attachment is fixed. And finishing polishing.

That is, FIG. 12 is a view showing an example of the spring head, and FIG. 13 is a view of the spring head of FIG. In the figure, a top plate 75 is fixed to the bottom of a rod joint 74, and a guide 78 in which a plurality of vertical plates 77 are radially fixed to the outer periphery of a rod 76 coaxially suspended with the rod joint 74 is fixed. A sliding plate 80 having a punching portion 79 having a similar shape to the guide cross section and having a sufficiently large size is attached to the lower portion so as to be vertically movable so as to be tiltable with respect to the guide shaft and to make the outer periphery of the guide non-rotatable. A spring stopper 81 is fixed to the upper surface of the sliding plate 80 and a spring 82, both ends of which are mounted on the spring stopper 81 between the top plate 75 and the sliding plate 80.

A bolt 83 and a nut 84 are mounted below the guide 78 to prevent the sliding plate 80 from falling off. On the lower surface of the sliding plate 80, an attachment 8 for an attachment for peeling off a coating covering is provided.
5 is fixed. Note that the configuration of the spring head is not limited to FIGS. 12 and 13. For example, the guide is configured to have a groove in the axial direction on the outer periphery of the rod 76 or a square bar, and the punching of the sliding plate 80 is performed. The cross section of the guide may be similar to that of the top plate 7.
5 as an elastic body interposed between the lower surface of the sliding plate 80 and the upper surface of the sliding plate 80, in addition to a compression coil spring, rubber,
A sponge can also be used. Further, a key, a pin, and the like can be used as a stopper for preventing the sliding plate 80 from falling off.

FIG. 14 shows the sliding plate 80.
It is a figure which shows an example of the cutting tool for rough coating of the coating covering attached to the lower surface of a cutting edge 86b according to the outer diameter of a steel pipe.
Is appropriately selected from the flat (b) and the curved (c). A hole 86a is provided in the upper part of the cutting tool 86, and a hole 85a provided in the fixture 85 on the lower surface of the sliding plate 80 and a hole 86a of the cutting tool are provided.
Pass the bolt through and tighten the nut.

When the resiliently acting coated rough cutting attachment configured as described above is attached to the rod end of a boring machine and pressed against a steel pipe, even if the boring machine rod comes off the top of the steel pipe, the sliding plate is removed. When 80 is pressed against the steel pipe, it tilts in the tangential direction on the outer circumference of the steel pipe, and further, the top plate 75 and the sliding plate 8
The inclination of the outer periphery of the steel pipe in the tangential direction is maintained by the repulsive force of the elastic body interposed between the cutting tools 86 and the respective cutting tools 86
Is pressed against the outer circumference of the steel pipe with a uniform force, so that the coating and coating stripping is uniformly performed by the resilient pressing rotation.

Next, the cutting tool 86 is removed, the cutting wire brush 87 shown in FIG. 15 is fixed to the fixture 85, and the remaining coating is cut, thereby completing the rough cutting in which the ground of the steel pipe is exposed. I do. If the removal of the coating at the center is not complete even in the rough cutting of the coating, as shown in FIG. 16, a spring head 90 equipped with a sliding plate 89 with a rod joint 88 fixed to the center of the lower surface of the plate is used. To interpose.

The structure of the spring head 90 other than the sliding plate 89 is the same as that shown in FIG. The pig bit 42 shown in FIG. 8 is attached to the spring head 90 to remove the coating covering remaining at the center. When removing the coating, FIG.
Alternatively, when it is not necessary to use the spring head shown in FIG. 16, the pig bit 42 is mounted directly on the tip of the rod of the boring machine.

The rubbing-type peeling with the crown body 46 shown in FIG. 9 and the finish polishing with the wire brush head 54 shown in FIG. 10 are the same as the removal of the coating by the pig bit 42. Therefore, the description is omitted. (F ′) As shown in FIG. 17, a suspended synthetic resin casing 57 such as vinyl chloride is brought into contact with the above-mentioned peeling portion by descending. In addition, in order to confirm the anticorrosion effect, a zinc reference electrode or a probe 55 was previously attached to the outer surface of the lead wire 56.
The casing 57 can also be brought into contact with the lower part via the. The casing 57 has a cushion seal 59 formed by applying rubber lining or applying a sealing material to a flange 58 at the lower end to shut off the seal between the inside and outside of the pipe. The casing 57
Is connected to a plate 62 of a boring machine via a jack 61 fixed on a flange body 60 integrally provided at the upper end as shown in FIG. 18, and the plate 62 is pushed down as a reaction force base by the expansion and contraction operation of the jack 61, Get raised.

As shown in FIG. 19, a cam lock coupler 64 for connecting a fresh water pump and a pressure gauge 65 for detecting fresh water pressure are provided on a lid 63 attached to the opening of the casing 57. After confirming that the casing 57 comes into contact with the casing 57, the casing 57 is slightly lifted up to form a small gap. In this state, fresh water is injected and the slime in the casing 57 is pushed out of the pipe. Remove the casing 57 immediately
And crimp it down. In order to stabilize the casing 57, as shown in FIG.
m).

With the solidification stability of the cement milk 67,
The water in the casing 57 is vacuum-pumped, and the wiping is finished by wrapping a cloth or the like on the attachment such as the pick bit 42 or by attaching the tip of the attachment 91 shown in FIG. 21 to the spring head shown in FIG. The cloth 9
2, the coating and wiping tool 93 covered with sponge, cotton, etc. is fixed to the fixture 85, and the remaining coating and wiping is wiped off.
The cleaning of the coating removal part is completed. If a solvent such as thinner is impregnated in advance into the cloth or the like for wiping the coating, the portion where the coating is removed can be more completely cleaned.

In order to achieve perfect cleaning of the stripping part, forced drying, re-polishing and re-wiping are performed as necessary, with the dryer being carried in, based on confirmation by a television camera. In addition, it is not necessary to always perform a series of operations of rough cutting of the coating, rubbing-type peeling, finish polishing, and wiping of the coating. Accordingly, some operations can be omitted. (G ′) As shown in FIG. 22, a terminal plate 71 with a lead wire 70 having a fixing magnet 68 on a base plate portion and a standing tikaweld 69 is detachably attached to the tip of a rod 73 (screwed). To lower the inside of the casing 57,
Attach to the stripping part by suction. The lowering of the terminal plate 71 having the magnetic surface in the casing 57 has no problem because the casing 57 is made of an insulating material. (H ') The tikawel 69 is ignited to perform welding. Check it out.

Also, a top plate is fixed to the bottom of the rod joint, and the bottom plate is locked below the top plate via an elastic body.
At the outer periphery of the bottom plate, a stud holder having a stud holding portion having a lead wire penetrating portion at an upper portion is attached to a rod end of a boring machine, and a lead wire reaching the ground is attached to the stud holding portion. Alternatively, a stud (in place of a terminal plate) attached to the steel pipe may be attached and welded to the steel pipe.

FIGS. 23 to 25 are views showing an example of the stud holder. That is, the rod joint 94
The top plate 95 is fixed to the bottom of the bottom plate 9 and the lower surface of the top plate 95 and the bottom plate 9 are fixed.
A spring 98 is interposed in a spring stopper 97 fixed to the upper surface of the base 6, and a bottom plate 96 is locked. The bottom plate 96 is made of an insulating material. On the outer peripheral portion of the bottom plate 96, the upper portion is a lead wire penetrating portion 99a of a substantially U-shaped groove whose outer peripheral portion is open, and the lower portion is a stud mounting hole having a larger diameter than the lead wire penetrating portion. A stud holding hole 99 constituted by a groove reaching the outer peripheral portion and a stud fixing portion 99b whose outer peripheral portion is opened is appropriately arranged.

Further, a groove 100 is appropriately provided on the circumference of the stud mounting hole, and a retaining ring or an O-ring for holding the stud is fitted in the groove. The configuration of the stud holder is not limited to the above-described one. For example, as in a spring head shown in FIG. 19, a guide is coaxially dropped and fixed to the bottom of the rod joint 94, and a punch having a shape similar to the cross section of the guide is punched on the bottom plate. It is also possible to provide a bottom plate falling prevention tool below the guide.

The stud welding operation is performed in the following procedure. As shown in FIG. 26, first, the lead wire 101b of the stud 101 is inserted from the bottom of the stud holding hole 99, pulled out from the lead wire penetrating portion 99a, and pulled out of the stud body 101a.
Is attached to the stud mounting hole 99b, the stud holding hole 99 is attached to the rod end of the boring machine, the casing 57 is lowered, and the end of the stud body 101a is pressed against the steel pipe 1.

Next, the lead wire 10 of one stud 101
1b is connected to the positive terminal of the welding power source 102, and the lead wire 101b of the other stud 101 is connected to the negative terminal of the welding power source 102. This allows a separate ground terminal to be connected to the steel pipe 1
It saves the trouble of connecting to. When the number of the studs 101 is three or more, the lead wire of the stud after welding is removed, and the lead wire of an unwelded stud may be connected and welded.

When welding only one stud, the lead wire 101b is connected to the positive terminal of the welding power source 102,
The magnetically grounded terminal is brought into contact with the steel pipe 1. As the stud welding method, the percussion welding method (CD method) in which a large-capacity capacitor is charged and discharged instantaneously between the stud 101 and the steel pipe 1 to perform welding does not burn the surrounding coating. Also, it is preferable because it does not affect the inside of the steel pipe 1 by heat. (I ') The exposed metal surface of the stripped portion is covered and repaired by injecting a resin having a low viscosity with a resin filling hose brought in by a resin filling hose and a resin press-fitting pump. It is preferable to check the degree of covering with a television camera or the like. It is advisable to conduct a temporary power supply for the test. (Nu ') Backfill inside and outside of the casing 57.

After that, a control box is installed and restored. The above steps are summarized in the flowchart of FIG.
FIG. 28 shows a state before the control box is installed.

[0039]

According to the present invention having the above-described structure, the following effects can be obtained. If the terminal is installed to prevent corrosion of concrete / soil-based macrocells at the water inlet and outlet of the water treatment plant and water supply pond, or if a terminal is installed for inspection and inspection of buried pipes, etc. However, it requires enormous costs for digging and the construction period is long (2-4 months / pile). In addition, when performing internal bonding of telescopic tubes, difficult work such as stopping water supply is required,
In contrast, when the terminal is mounted by the method of the present invention,
This can be done without stopping the water supply, and the cost and construction period can be reduced. Further, it is preferable because damage to the coating film in the tube is avoided.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of positioning of a tube center according to the present invention.

FIG. 2 (a) is an explanatory view of an excavating center of the present invention, and FIG. 2 (b) is an explanatory view of installation of a mouth pipe.

FIG. 3 is an explanatory view of a drill bit according to the present invention.

FIG. 4A is a plan view of an impression block of the present invention, and FIG. 4B is a front view.

FIG. 5 is a perspective explanatory view of a spring head for cutting and coating a coating material according to the present invention;

FIG. 6 is an explanatory diagram of a coating device.

FIG. 7 is a perspective explanatory view of a spring head for attaching various attachments of the present invention.

FIG. 8 is an explanatory diagram of a pick bit according to the present invention.

FIG. 9 is an explanatory view of a crown body of the present invention.

FIG. 10 is a perspective explanatory view of the wire brush head of the present invention.

FIG. 11 is an explanatory view of a polishing operation mode of the wire brush head of the present invention.

FIG. 12 is an explanatory view of a spring head according to the present invention.

FIG. 13 is a view taken along the line AA in FIG. 12;

14A is a side view of a cutting tool according to the present invention, and FIGS. 14B and 14C are front views.

FIG. 15a is a side view of the cutting wire brush of the present invention,
b and c are front views.

FIG. 16 is an explanatory view of a spring head according to the present invention.

17A is an explanatory view of a casing of the present invention, and FIG. 17B is an enlarged explanatory view of a main part.

FIG. 18 is an explanatory view of a casing pressurizing device of the present invention.

FIG. 19 is an explanatory view of a fresh water press-fitting device in a casing according to the present invention.

FIG. 20 is an explanatory view of filling of cement milk for casing stabilization of the present invention.

FIG. 21a is a side view of the coating and wiping device of the present invention, and FIG.
Is a front view.

FIG. 22 is an explanatory diagram of a terminal according to the present invention.

FIG. 23 is an explanatory view of a stud holder of the present invention.

24 is a BB view as viewed from the direction of the arrow in FIG.

FIG. 25 is an enlarged overhead view of a main part of the stud holder.

FIG. 26 is an explanatory diagram of stud construction according to the present invention.

FIG. 27 is a flowchart of the process of the present invention.

FIG. 28 is a view showing a state before installing a box according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel pipe 2 Pipe center axis 3 Tack 3 'Tack 4 Terminal installation point 5 Tack 5' Tack 6 Mouth pipe 7 Bit 8 Cutting blade 9 Cutting blade 10 Stabilizer 11 Iron plate 12 Wooden plank 13 Clay layer 14 Nail 15 Impression block 16 Heaven Plate 17 Bottom plate 18 Cylindrical box 19 Partition wall 20 Upper chamber 21 Lower chamber 22 Spring 23 Slide plate 24 Rod joint 25 Central opening 26 Spring 27 Slide plate 28 Cutting edge 29 Cutting edge 30 Peripheral opening 31 Central opening 32 Vertical guide rail 33 Groove 34 Coating cover 35 Circular locus cut 36 Circular cut 37 Joint 38 Slide plate 39 Pick 40 Tube 41 Joint 42 Pick bit 43 Joint 44 Steel frame 45 Crown 46 Crown body 47 Joint 48 Box 49 Bottom plate 50 Steel brush 51 Short cylinder 52 Shaft 53 Spring 54 Wire brush head 55 Probe 56 Lead wire 57 Casing 58 Flange 59 Cushion seal 60 Flange 61 Jack 62 Plate 63 Cover 64 Cam lock coupler 65 Pressure gauge 66 Boring hole 67 Cement milk 68 Fixing magnet 69 Ticauerd 70 Lead wire 71 Terminal plate 72 Boring machine 73 Rod 74 Rod joint 75 Top plate 76 Rod 77 Vertical plate 78 Guide 79 Punching part 80 Sliding plate 81 Spring stopper 82 Spring 83 Bolt 84 Nut 85 Fixture 85a hole 86 Cutting bite 86a hole 86b Cutting edge 87 Cutting wire brush 88 Rod joint 89 Sliding Rate 90 Spring head 91 Attachment 92 Cloth 93 Paint wiping tool 94 Rod joint 95 Top plate 96 Bottom plate 97 Spring stop 98 Spring 99 Stud holding hole 99a Lead wire penetration 99b Stud fixing part 100 Groove 101 Stud 101a Stud body 101b Lead wire 102 welding power source H spring head T tremy tube

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shunsuke Goto 1-29-10 Maeno-cho, Itabashi-ku, Tokyo Within Nihon Corrosion Engineering Co., Ltd. (56) References JP-A-3-247826 (JP, A) JP-A-61-162644 (JP, A) JP-A-7-174264 (JP, A) JP-A-5-1188081 (JP, A) Full-scale operation 60-161564 (JP, U) Real-time operation -180513 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 1/024

Claims (10)

(57) [Claims] (1) Accurate positioning of the center of the top of a buried steel pipe whose burial depth is determined by drawing and surveying. (B) Drilling near the top of the buried steel pipe by boring. (C) A drilling that reaches the top of the buried steel pipe with a bit that does not damage the buried steel pipe. (D) Confirmation of the top of the buried steel pipe. (E) Various cutting and resilient functions to be attached to the rod tip of the boring machine, coating and peeling off the top surface of the buried steel pipe with an attachment for polishing, and pipe surface polishing. (F) A cushion seal is put on the lower end, and the suspended casing comes into contact with the coating stripping portion and removes slime in the casing, solidifies the casing, pumps water in the casing, and removes residual moisture. Removal. (G) Drop-in loading with a magnetically attached terminal plate with tikaweld attached to a lead wire and detachably attached to the rod tip of a boring machine. (H) Magnetic adhesion of the terminal plate to the top of the buried steel pipe and welding of the terminal plate to the top of the buried steel pipe by ignition of the tikaweld. (I) Filling the resin for repairing the coating of the stripped coating cover by bringing the resin filling hose into the terminal. (Nu) Backfill inside and outside the casing. A method for attaching a terminal to a steel pipe buried in deep soil, characterized by comprising the above steps. 2. (a) Accurate positioning of the center of the top of the buried steel pipe whose burial depth is determined by drawing and surveying. (B) Drilling near the top of the buried steel pipe by boring. (C) A drilling that reaches the top of the buried steel pipe with a bit that does not damage the buried steel pipe. (D) Confirmation of the top of the buried steel pipe. (E) Various cutting and resilient functions to be attached to the rod tip of the boring machine, coating and peeling off the top surface of the buried steel pipe with an attachment for polishing, and pipe surface polishing. (F) A cushion seal is put on the lower end, and the suspended casing comes into contact with the coating stripping portion and removes slime in the casing, solidifies the casing, pumps water in the casing, and removes residual moisture. Removal. (G) Drop-in while holding the stud with lead wire on the stud holder that is locked at the rod end of the boring machine. (H) Welding of the tip of the stud with the lead wire to the top of the buried steel pipe due to discharge of electric charge from the welding power source. (I) Filling the stud portion with resin for repairing the coating of the peeled-off coating portion by bringing the resin filling hose into the stud portion. (Nu) Backfill inside and outside the casing. A method for attaching a terminal to a steel pipe buried in deep soil, characterized by comprising the above steps. 3. The top of a buried steel pipe used directly for carrying out the invention according to claim 1 or 2, which is attached to a rod end of a boring machine instead of a bit as an attachment formed by fastening a clay layer to a lower surface of a plate. Impression block. 4. A cylindrical box having a top plate and a bottom plate, divided into upper and lower chambers by a partition wall, and a slide plate having a spring and a paired rod joint over the spring is provided in the upper chamber. The joint protrudes from the central opening of the top plate, while the lower chamber is internally provided with a spring and a slide plate having a longer central portion with a short mild steel blade protruding around the lower surface for receiving the spring. The cutting edge protrudes from a peripheral opening and a central opening of the bottom plate, and both slide plates are assembled by fitting concave grooves provided around the vertical guide rails projecting from the inner wall of the box. 3. A jig for coating and rough coating a steel pipe directly used for carrying out the invention according to claim 1 or 2, wherein the jig can be slid vertically. 5. A cylindrical box having a top plate and a bottom plate, divided into upper and lower chambers by a partition wall, and a slide plate having a spring and a paired rod joint over the spring is provided in the upper chamber. The joint protrudes from the central opening of the top plate, while a spring and a slide plate provided with a joint for attachment attachment at the center of the lower surface for receiving the spring are provided in the lower chamber, and the joint is provided at the central opening of the bottom plate. And both slide plates are assembled with a vertical guide rail protruding from the inner wall of the box by fitting a concave groove provided on the periphery thereof, and can be vertically slid. 3. A spring head as an interposition device for resiliently attaching various attachments attached to a rod tip, which is used directly for carrying out the invention according to claim 1 or 2. 6. A top plate and a guide suspended coaxially with the rod joint are fixed to the bottom of the rod joint, and a sliding plate that is vertically movable with respect to the guide shaft and that rotates synchronously with the guide is provided below the guide. Is attached, an elastic body is interposed between the top plate and the sliding plate, and an attachment for an attachment for peeling off coating, polishing a pipe surface, wiping paint, or cleaning a pipe surface on the lower surface of the sliding plate. 3. A spring head as a repelling device for various attachments attached to a rod end of a boring machine directly used for carrying out the invention according to claim 1 or 2, wherein the rod joint is fixed. 7. A top end of a cylindrical body for hanging a pick as an attachment for boring rod tip attachment or an attachment for attachment to a spring head tip attachment according to claim 5 or an attachment on a lower surface of a sliding plate according to claim 6. A pig bit for coating and stripping directly used in the practice of the invention according to claim 1 or 2, wherein a joint is provided on the pig bit. 8. A crown having a joint at a top end is provided as a boring rod tip mounting attachment or a spring head tip mounting attachment according to claim 5 or an attachment attached to a lower surface of a sliding plate attachment according to claim 6. 3. A crown body for peeling off a coating material to be directly used for carrying out the invention according to claim 1 or 2. 9. A ceiling having a joint at a top end thereof as a box frame or an attachment for attaching a tip of a boring rod or an attachment for attaching a tip of a spring head according to claim 5 or an attachment for attaching to a fixture on the lower surface of a sliding plate according to claim 6. A short cylindrical body having a brush made of steel brushed on a supporting bottom plate via a column is taken out, and a shaft punch is hung densely on a circumferential locus while preventing disengagement with a spring interposed. Item 4. A wire brush head for directly peeling off a coated material for use in carrying out the invention described in Item 1 or 2. 10. A top plate is fixed to the bottom of the rod joint, the bottom plate is locked below the top plate via an elastic body, and a stud clamp having a lead wire penetrating portion at an upper portion on the outer periphery of the bottom plate. 3. A stud holder attached to a rod tip of a boring machine directly used for carrying out the invention according to claim 2, wherein the parts are appropriately arranged.