How to excavate holes for building posts

Abstract

The present disclosure relates to a hole drilling method for erecting poles, the method comprising: a step 1 for suspending a vibrator on which a cylindrical casing tube is mounted and placing the vibrator on the ground surface; a step 2 for vibrating the casing tube with the vibrator and causing the casing tube to penetrate into the ground; and a step 3 for stopping the vibration of the vibrator when the casing tube penetrates to a predetermined depth.

Description

[Technical Field]

[0001] The present disclosure relates to a method for drilling a hole for a post using a casing tube. [Background technology]

[0002] Holes for erecting posts are dug by hand to a depth of about 1.5 m to avoid damaging the buried objects, and then a hole-digging vehicle is used to excavate the holes to the desired depth. Hand-digging work is physically demanding and time-consuming.

[0003] A related method for excavating a hole for a pole is shown in Figure 1. In Figure 1, 51 is an earth auger drill and 52 is a hole-digging pole-setting vehicle. The earth auger drill 51, which is hung from the tip of the crane of the hole-digging pole-setting vehicle 52, is rotated to excavate a hole for a pole (see, for example, Patent Document 1).

[0004] Since the earth auger drill 51 is constantly digging up earth and sand by rotating, the excavated earth and sand must be disposed of manually or by heavy machinery as needed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 8-177364 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with these related methods of excavating holes for erection posts, if manual digging is performed in the early stages, it puts a lot of strain on the body and takes a lot of time, while if manual digging is avoided and an earth auger drill 51 is used from the early stages, the great digging force of the earth auger drill 51 can damage the buried objects, which is a problem.

[0007] The present disclosure aims to enable drilling of pole holes using a machine and to improve the efficiency of drilling work. [Means for solving the problem]

[0008] In the pole hole drilling method disclosed herein, the casing tube is vibrated by a vibrator and penetrated into the ground.

[0009] Specifically, the present disclosure provides: Step 1: Hanging a vibrator equipped with a cylindrical casing tube and placing it on the ground surface; Step 2: vibrating the casing tube with the vibrator and penetrating the casing tube into the ground; Step 3: stopping the vibration of the vibrator when the casing tube penetrates to a predetermined depth; A method for drilling a hole for a building pole is.

[0010] The present disclosure provides: In step 2, when the vibrator detects contact with an embedded object, the vibration of the vibrator is stopped. It is characterized by:

[0011] The present disclosure provides: The vibrator detects contact with a buried object when it detects a vertical pressure greater than a predetermined value. It is characterized by:

[0012] The present disclosure provides: The vibrator detects contact with the buried object when the vibrator detects a penetration speed that is less than a predetermined value. It is characterized by:

[0013] The present disclosure provides: After step 3, step 4A is performed to lift the soil inside the casing tube together with the casing tube and discard the soil. Further equipped It is characterized by:

[0014] The present disclosure provides: After step 3, step 4B is performed to agitate the soil inside the casing tube and remove it by suction. Further equipped It is characterized by:

[0015] The present disclosure provides: After step 3, step 4C is performed to connect a utility pole to the top surface of the casing tube. Further equipped It is characterized by:

[0016] The above-disclosed inventions can be combined as much as possible. [Effects of the Invention]

[0017] According to the present disclosure, it is possible to realize the excavation of holes for erection posts using machinery, thereby improving the efficiency of excavation work. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 10 is a diagram illustrating a related method for drilling a hole for a building pole. [Figure 2] 1 is a diagram illustrating the method for drilling a hole for a post according to the present disclosure. FIG. [Figure 3] FIG. 2 is a cross-sectional view of an example casing tube. [Figure 4] FIG. 10 is a diagram illustrating a step of discharging soil. [Figure 5] FIG. 10 is a diagram illustrating a step of discharging soil. [Figure 6] FIG. 10 is a diagram illustrating a step of discharging soil. [Figure 7] FIG. 10 is a diagram illustrating a step of discharging soil. [Figure 8] FIG. 10 is a diagram illustrating the steps of connecting utility poles. [Figure 9] FIG. 10 is a diagram showing an example of connecting utility poles. [Figure 10] FIG. 10 is a diagram showing an example of connecting utility poles. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below. These implementation examples are merely illustrative, and the present disclosure can be implemented in various forms with various modifications and improvements based on the knowledge of those skilled in the art. Note that components with the same reference numerals in this specification and drawings indicate the same components.

[0020] The pole-setting hole drilling method of the present disclosure is explained with reference to Figure 2. A vibrator 11 equipped with a casing tube 12 is transported to the pole-setting location by a mounting vehicle 13. The mounting vehicle 13 may be a hole-digging pole-setting vehicle that has been used to transport an earth auger drill, or it may be transported by a carrier.

[0021] (Step 1) The vibrator 11 equipped with the casing tube 12 is hung and placed on the ground surface. When transported by a hole-digging pole-setting vehicle, it is hung by the crane of the hole-digging pole-setting vehicle and placed on the ground surface. When transported by a carrier, it is hung by a yagura and placed on the ground surface.

[0022] The shape of the casing tube 12 may be any cylindrical shape with a hollow interior in the longitudinal direction, such as a cylinder (a) or a square tube (b) as shown in Figure 3. This type of shape has no sharp edges compared to an earth auger drill, and the area that comes into contact with buried objects is flat, so even if it comes into contact with buried objects, it is less likely to damage them. Furthermore, unlike an earth auger drill, stones do not get stuck between the blades.

[0023] (Step 2) The casing tube 12 is vibrated in the vertical direction by the vibrator 11, and penetrates into the ground. The amplitude of the vibration obtained by the vibrator 11 is expressed by the following equation. Amplitude (m) = Eccentric moment (kgm) / Total weight (kg) (1) where: Total weight (kg) = vibrator weight (kg) + casing tube weight (kg) (2)

[0024] When a Uras Vibrator with an eccentric moment of 1.2 kgm / weight of 100 kg is used as the vibrator, equations (1) and (2) show that when vibrations are generated in a 160 kg casing tube, an amplitude of 6 mm or more can be generated. Experience has shown that an amplitude of 6 mm or more allows the casing tube to penetrate many types of soil. By adjusting the amplitude of the casing tube generated by the vibrator, it is possible to accommodate a variety of soil types.

[0025] It is desirable that the vibrator 11 be equipped with a sensor that detects contact with a buried object. When the sensor detects that the vibrator 11 has come into contact with a buried object, the vibration of the vibrator 11 is stopped. This can prevent the casing tube from damaging the buried object.

[0026] An example of a sensor that detects contact with a buried object is a pressure gauge that detects vertical pressure. When the casing tube 12 comes into contact with a buried object, pressure increases through the casing tube 12 to the vibrator 11. When the pressure gauge of the vibrator 11 detects a vertical pressure greater than a predetermined value, the vibration of the vibrator 11 is stopped. If the vibration of the vibrator 11 is stopped upon contact with the buried object, the buried object will not be damaged, and the work of excavating a hole for a post can be carried out with the same safety as manual digging.

[0027] Another example of a sensor that detects contact with a buried object is a speedometer that detects the penetration speed of the vibrator 11. When the casing tube 12 comes into contact with a buried object, the penetration speed of the casing tube 12 slows down. When the speedometer of the vibrator 11 detects a penetration speed lower than a predetermined value, the vibration of the vibrator 11 is stopped. For example, when the penetration distance in 10 seconds is 1 mm, that is, when the penetration speed is less than 0.1 mm / sec, it is determined that a buried object has been contacted. If the vibration of the vibrator 11 is stopped when the buried object is contacted, the buried object will not be damaged, and therefore, the work of excavating a hole for a post can be performed with the same safety as manual digging.

[0028] (Step 3) When the casing tube 12 penetrates to a predetermined depth, the vibration of the vibrator 11 is stopped. When excavating deeper, an extension bar is connected between the vibrator 11 and the casing tube 12.

[0029] Therefore, according to the present disclosure, it is possible to realize the excavation of holes for erection posts using a machine, thereby improving the efficiency of excavation work.

[0030] (Step 4A) After the vibration of the vibrator 11 is stopped, the soil inside the casing tube 12 is lifted together with the casing tube 12, and the soil is removed from the post-construction hole. The soil removal step is explained with reference to Figure 4. In Figure 4, 12 is the casing tube, and 21 is the soil. When the casing tube 12 is lifted, the soil 21 inside the casing tube 12 is also lifted. Once the soil 21 is removed from the post-construction hole, the post-construction hole is completed.

[0031] Therefore, if the soil 21 is lifted together with the casing tube 12, the excavation work can be made more efficient.

[0032] (Step 4B) After the vibration of the vibrator 11 is stopped, the soil inside the casing tube 12 is agitated and then sucked out of the post hole. The discharge steps are explained with reference to Figures 5, 6 and 7. In Figures 5, 6 and 7, 12 is the casing tube, 14 is the agitator, 14-1 is the agitator's rotating shaft, 14-2 is the agitator's mesh, and 15 is the suction pump.

[0033] The soil inside the casing tube 12 is agitated by the agitator 14, loosened, and then sucked out by the suction pump 15. The agitator may be placed inside the casing tube 12 before excavation, or may be inserted into the casing tube 12 after the vibration of the vibrator 11 has stopped.

[0034] An example of the stirring device may be a drill mechanism as shown in Fig. 6. When the drill function is disposed inside the casing tube 12 before excavation, it is preferable to dispose the drill mechanism above the bottom of the casing tube 12 so that the drill mechanism does not come into contact with the buried object.

[0035] Another example of an agitator is a mesh with a stepped structure as shown in Figure 7. The mesh is stepped so that the mesh is coarse at the bottom and finer at the top. The agitator's rotating shaft 14-1 is pushed toward the bottom of the casing tube 12 while rotating. The lower agitator mesh 14-2 with a coarse mesh loosens the soil strongly, and the upper agitator mesh 14-2 with a finer mesh loosens it finely. Changing the mesh size from coarse to fine in the vertical direction makes it easier to loosen the soil.

[0036] Therefore, by agitating the soil inside the casing tube 12 and then sucking it out and discarding it, the efficiency of the excavation work can be improved.

[0037] (Step 4C) After the vibration of the vibrator 11 is stopped, a utility pole is connected to the top surface of the casing tube 12. In this case, it is desirable that the shape of the casing tube 12 is cylindrical to match the utility pole 22. The steps for connecting the utility pole are explained with reference to Figures 8, 9, and 10. In Figures 8, 9, and 10, 12 is the casing tube, 16 is the casing tube bolt hole, 17 is the casing tube bolt, 18 is the casing tube bolt mounting bracket, 19 is the mounting bracket bolt, 20 is the mounting bracket nut, 21 is the soil, 22 is the utility pole, 23 is the utility pole bolt hole, 24 is the utility pole bolt, and 25 is the utility pole mounting bracket.

[0038] As shown in Figure 8, the casing tube 12 is removed from the vibrator, and a utility pole 22 is placed on the top surface of the casing tube 12. The mounting mechanism is omitted in Figure 8. As shown in Figure 9, casing tube bolt holes 16 are pre-formed in the casing tube 12, and utility pole bolt holes are pre-formed in the utility pole 22. As shown in Figure 10, a casing tube bolt mounting bracket 18 is fixed to the casing tube 12 with a casing tube bolt 17. A utility pole mounting bracket 25 is fixed to the utility pole 22 with a utility pole bolt 24. The casing tube bolt mounting bracket 18 and the utility pole mounting bracket 25 are aligned and fixed with a mounting bracket bolt 19 and a mounting bracket nut 20. The mounting mechanism is not limited to that described here. It is sufficient that the casing tube 12 and the utility pole 22 are fixed.

[0039] Therefore, since the casing tube 12 is used as the base of the utility pole when erecting the pole, the labor required for erecting the pole can be reduced and excavation work can be made more efficient. In addition, the labor required for backfilling the gap between the pole erection hole and the utility pole with soil and for disposing of waste soil can be reduced, which can improve the efficiency of excavation work.

[0040] As described above, according to the pole hole drilling method disclosed herein, it is possible to drill pole holes using a machine, thereby improving the efficiency of excavation work. [Industrial Applicability]

[0041] The present disclosure can be applied to various industries including the information and communications industry. [Explanation of symbols]

[0042] 11: Vibrator 12: Casing tube 13: Vehicle equipped 14: Stirring device 14-1: Rotating shaft of the agitator 14-2: Stirring device mesh 15: Suction pump 16: Casing tube bolt hole 17: Casing tube bolt 18: Casing tube bolt mounting bracket 19: Mounting bracket bolt 20: Mounting bracket nut 21: Saturday 22: Electric pole 23: Telephone pole bolt hole 24: Electric pole bolt 25: Utility pole mounting bracket 51: Earth Auger Drill 52: Hole digging pole construction vehicle

Claims

1. Step 1: Hanging a vibrator equipped with a cylindrical casing tube and placing it on the ground surface; Step 2: vibrating the casing tube with the vibrator and penetrating the casing tube into the ground; Step 3: stopping the vibration of the vibrator when the casing tube penetrates to a predetermined depth; A method for drilling a hole for a pole, comprising: A method for excavating a hole for a building pole, characterized in that in step 2, when the vibrator detects a penetration speed lower than a predetermined value, the vibration of the vibrator is stopped.

2. After step 3, step 4A is performed to lift the soil inside the casing tube together with the casing tube and discard the soil. The method for drilling a hole for a post according to claim 1, further comprising:

3. After step 3, step 4B is performed to agitate the soil inside the casing tube, suck it up, and discard the soil. The method for drilling a hole for a post according to claim 1, further comprising:

4. After step 3, a step 4C is performed to connect a utility pole to the upper surface of the casing tube. The method for drilling a hole for a post according to claim 1, further comprising:

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