JP2010095983A - Method for burying pipe lot member in hard ground or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems in grounding work in the hard ground wherein driving is impossible and grounding depth cannot be taken, and although a hand rock drill is conventionally used to carry out boring for construction, there is a limit in the length of a tapered lot to be bored and there is a restriction in the grounding depth, and the grounding work using a boring device is large-scaled and requires time and cost. <P>SOLUTION: A pipe lot member used as a grounding electrode itself without needing to be pulled out is fitted into a boring bit mounted with a fixing tool, to construct with a tapered lot member for driving rotation. Construction depth of two to three times of construction by boring with the conventional hand rock drill can be obtained, and the time and labor for inserting the grounding electrode after the pulling out are eliminated, and a material cost of the inserted grounding electrode is not required, resulting in a sharp cost reduction including labor cost. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a member for grounding work and a method for burying a grounding electrode.

  Conventionally, a general ground electrode embedding method in hard ground is a pneumatic hand rock drill, first drilled with a 1500 mm long taper rod with a 44 mm thick drill bit, and then Drill a hole with a 2500 mm long taper rod with a 40 mm thick drilling bit and then drill with a 3500 mm long taper rod with a 36 mm thick drilling bit. Drill a hole with a 4500 mm long taper rod attached with a 32 mm thick drilling bit, and pull out the taper rod as shown in FIG. A method is adopted in which three connected grounding rods having a thickness of 10 mm and a length of 1500 m are inserted and connected at intervals of 2 to 3 m until a prescribed value can be obtained. In addition, even when the construction site is limited and drilling depth is required at one place, a large-scale construction method using a boring device that pulls out the rod and inserts the ground resistance reducing agent and the grounding electrode is taken. Yes.

  In the construction method using conventional technology and equipment, even if the thickness of the drilling bit is changed as described above, there is a limit to the drilling depth that can be pulled out, and it takes time to insert and remove it. The current situation is that it was costly and costly. According to the present invention, since the ground electrode buried in the ground for grounding is a pipe lot member according to claim 1.2, it is not necessary to pull out and the working time can be shortened. In addition, it is easy to work simply by adding pipe lot members, and the drilling depth can be deepened, so there is no need to use a construction method that uses a large-scale boring device, improving safety and significantly reducing costs. It is an issue to provide technology and equipment that can be used.

  In order to solve the above-mentioned problem, by using a pipe lot member that can connect two or more upper and lower ends to each other as necessary according to claim 1 of the present invention, the rod for hole drilling is pulled out as in the past, Workability is improved because there is no need to drill holes while replacing.

  In addition, by using the pipe lot member according to claim 2 made of a chromium-free high corrosion-resistant plated steel plate into a pipe, there is no possibility of causing soil contamination with hexavalent chromium like conventional galvanized steel materials, Since it has excellent corrosion resistance, it is possible to maintain the ground resistance for a long time.

  Furthermore, by processing and using the pipe, an inexpensive bare copper wire can be inserted into the pipe as a grounding electrode, and a grounding resistance reducing agent can be injected from the ground and allowed to flow out from the tip of the drilling bit into the ground. Therefore, the ground resistance can be greatly reduced.

  The pipe bit member according to claims 1 and 2, which itself does not need to be pulled out as a grounding electrode, is inserted into the drilling bit to which the fixing jig according to claim 4 of the present invention is attached, If the construction is made with a taper lot member, the labor of inserting the grounding electrode after being pulled out can be saved, and the material cost of the grounding electrode to be inserted is not required. Therefore, labor costs and costs are greatly reduced.

  A pipe lot member 2 and a drilling bit fixing jig 3 according to an embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view showing a state where the pipe lot member 2 is inserted into the drilling bit to which the fixing jig 3 is attached and the bare copper wire 5 is inserted into the pipe, and FIG. 4 is a taper lot member for driving rotation. It is an expanded sectional view which shows the state before an assembly | attachment of 1 and a pipe lot member 2. FIG. FIG. 5 is an enlarged view showing the assembled state of the taper lot member 1 and the pipe lot member 2 for placement rotation.

  The taper lot member 1 for casting rotation according to the embodiment of the present invention shown in FIG. 4 is made of steel and includes a rear end portion 1a and a front end portion 1b. The rear end portion 1a can be used with a commercially available hand rock drill, and the front end portion 1b is tapered so that it can be easily inserted into the rear end portion 2a of the pipe lot member 2. It is processed into a polygon so that it can be prevented.

  The pipe lot member 2 according to the embodiment of the present invention shown in FIG. 4 is formed by processing a chromium-free high corrosion-resistant plated steel plate into a pipe, and the tip portion 2b is swedged so that two or more upper and lower ends can be connected to each other as needed. It can be easily added, and since it has excellent corrosion resistance, the ground resistance can be maintained for a long time.

  Also, considering the efficiency of the work of raising and lowering the machine, the pipe lot member 2 has a total length of 1000 mm, a thickness of 23 mm, a thickness of 3.2 mm, and a swage processed portion of about 130 mm so that the mating assembly is not uneven. .

  The fixing tool for the drill bit according to the embodiment of the present invention shown in FIG. 3 is made of iron, and is aligned with the taper portion in the drill bit to prevent slippage of the pipe lot member 2 wedged portion.

  Conventional construction method using a boring machine with a hand rock drill   Sectional view of grounding method using pipe lot member and fixing jig of the present invention   Expanded sectional view of the fixing jig and drilling bit of the present invention   Enlarged sectional view of tapered lot member and pipe lot member of the present invention   Enlarged view of tapered lot member and pipe lot member

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Taper lot member 1a Taper lot member rear end part 1b Taper lot member front end part 2 Pipe lot member 2a Pipe lot member rear end part 2b Pipe lot member front end part 3 Fixing tool for drilling bits 4 Drilling bit 5 Bare copper wire 6 Grounding Resistance reducing material 7 Drilling hole 8 Ground 9 Connected ground rod 10 Lead terminal

Claims (5)

  An inexpensive bare copper wire as a grounding electrode and a hard, strong, hollow metal tube for embedding a grounding resistance reducing agent deep in the ground. A pipe lot member characterized in that the portion is swaged and becomes a ground electrode.   2. The pipe lot member according to claim 1, wherein a chromium-free highly corrosion-resistant plated steel plate is processed into a pipe and used for the pipe lot member.   A taper rod member for driving rotation, characterized in that a portion where the pipe lot member is driven and rotated is processed into an ellipse, a square, or a polygon, and slippage of the rotary motion can be prevented.   A fixing jig for a pipe lot member and a drill bit that can be easily mounted with a drill bit for rock drilling attached to a tip portion of a pipe lot member and can prevent slippage due to rotational movement.   Since the pipe lot member does not need to be pulled out, the construction method can be constructed deeper than a conventional drilling depth by a rock drill capable of being held by a person.

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