JPS61266983A - Method and device for investigating buried body or digging hole - Google Patents

Abstract

PURPOSE:To investigate a buried body with human power up to a deep part without breaking the buried body by pressing a guide rod in the ground manually while jetting liquid from the tip of the guide rod then pressing a mechanically driven auger in along the guide rod. CONSTITUTION:A manual handle 3 is rotated with human power firstly to press the tip rod 1 in the ground. Pressurized liquid is supplied to the tail of the tip rod 1 through an air feed swivel 6, jetted into the ground from the tip of the rod 1, and then spouted out to the ground surface through the peripheries of a tip auger 12 and the hollow auger 4. The hollow auger 4 is fitted around the outer periphery of the rod with the handle 3 and rotated by the rotation of the motor in a driving part 5 to dig a hole. Further, an extension rod 2 is connected to advance the guide rod 1 and similar operation is performed. When the tip of the guide rod abuts on the buried body, the response of the manual operation changes, so the material, etc., of the buried body are judged.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method and apparatus for exploring and drilling underground objects.

<Conventional technology> In cities, there are old water and sewage pipes, gas pipes,
Cables and other cables are buried in a complicated manner, and records of their buried locations are often unclear.

Therefore, it is necessary to confirm the location of the buried object before driving sheet piles or mechanical excavation. Conventionally, the direct exploration method of driving a steel rod into the ground and checking the difference in resistance, and the magnetic field using induced current are used. Indirect exploration methods such as exploration and equipment are employed.

Problems to be Solved by the Present Invention However, since the direct exploration method is confirmed by the operator's feedback, it is labor intensive, cannot probe hard ground or deep areas, and requires time.

In addition, magnetic exploration methods can only confirm metals, have a limit to the depth, and have the disadvantage that measured values are difficult to trust when a large number of buried objects are mixed together.

OBJECTS OF THE INVENTION The present invention was made to improve such conventional methods, and an object thereof is to provide the following exploration and drilling method and apparatus.

B. A method and device that does not require heavy labor on the part of the operator as in the conventional direct exploration method, and does not require expensive and complicated equipment to handle as in the indirect exploration method.

A method and device that can detect and identify the presence of buried objects, not only metal, but also concrete pipes, PVC pipes, clay pipes, etc.

<C> A method and device that can be used not only for exploration holes but also for drilling underground, and that can easily correct bends and drill straight holes.

Structure of the Present Invention> Next, an embodiment will be described. The drilling device of the present invention is composed of a manual guide rod and a mechanically driven hollow auger.

〉Manual guide rod This guide rod consists of a tip rod 1 and an extension rod 2.

The tip rod 1 is provided with a tip auger 12 at its tip and a joint portion 13 at its rear end.

On the other hand, the extension rod 2 is simply a rod-shaped body with joints formed at both ends.

As shown in FIG. 4, each rod 1.2 has a passage 14.23 for pressurized air passed through its center.

Furthermore, if the cross section is circular, flat portions 14.22 are formed at appropriate intervals so that both the tip rod 1 and the extension rod 2 can be rotated by the manual handle 3. The rod is rotated by engaging a square hole or a jaw-shaped opening formed in the manual handle 3.

The joint portion of the rod 1.2 may have a known structure capable of transmitting rotational and axial forces.

Mechanically driven auger The mechanically driven hollow auger 4 has spiral blades 42 attached to the outer periphery of a hollow cylinder 41, with both ends open, and the internal hole diameter is at least as large as the outside of the rod 1.2. The rod 1.2 has a structure in which the rod 1.2 can freely rotate and slide within the hollow cylinder 41, which is larger than the diameter.

Joints are provided at both ends of the hollow cylinder 41 so that the hollow cylinder 41 can be sequentially connected and extended.

Further, the hollow auger 4 can be attached to and detached from the drive part 5, and the strong rotational force of the drive part 5 can force the hollow auger 4 into the ground and remove the earth.

The drive unit 5 is provided with a handle 51 for holding and a lever 52 for switching the direction of rotation.

The drive part 5 has a through hole in the center, and the inner diameter of this through hole is larger than the outer diameter of the rod 1.2, and the rod 1.2 can rotate and slide inside when inserted.

(c) A swivel 6 for pressurized air supply is fitted into the tail end of the swivel extension rod 2 for pressurized air supply.

The swivel 6 is a member for supplying pressurized fluid from an external compressor or pump to the flow path 23, 14 of the rotating extension rod 2, and a known swivel for supplying pressurized air or pressurized water can be used.

Effect of the present invention> Next, the operating method will be explained.

Insertion of the guide rod (Fig. 1) First, press the guide rod 1 into the ground vertically, horizontally, or diagonally.

This press-fitting operation is performed by manually rotating the manual handle 3.

The tip auger 12 of the tip rod 1 is press-fitted into the ground like screwing in a wood screw.

Even if the tip rod 1 is mostly press-fitted into the ground, if it is not possible to explore or drill to the intended depth with just that, an extension rod 2 is further connected.

Supply of pressurized air, etc. Pressurized air or pressure water from a compressor, shank, etc. is supplied to the tail end of the tip rod 1 or the tail end of the extension rod 2 via the air supply swivel 6.

The pressure fluid is ejected into the ground from the tip of the tip rod 1,
It follows the circumference of the blades of the tip auger 12 and the hollow auger 4 and ejects to the ground surface.

Therefore, each auger blade is surrounded by a layer of air or water, which insulates the soil from the blade, reducing adhesion to the blade.

(c) Setting the hollow auger (Figure 2) Remove the manual handle 3 from the extension rod 2 and insert the hollow auger 4 onto the outer periphery of the rod.

A driving part 5 is integrated with the base end of the hollow auger 4, and since the driving part 5 also has a through hole in the center, it can be inserted into the outer periphery of the extension rod 2 as it is.

2) Excavation of the hollow auger (Fig. 3) The hollow auger 4 is rotated by the rotation of the motor in the drive unit 5 or by input to the drive unit 5 from an external power source, and the earth is removed by applying axial force. Drill the hole while doing so.

At this time, since the leading guide rod 1.2 guides the excavation direction, there is no need to check or correct the directionality when operating the hollow auger 4 by mechanical force, and the excavation can be carried out quickly without considering such operations.

Advancement of the guide rod The guide rod 1.2 is advanced again in accordance with the length of the hollow auger 4 dug.

At this time, most of the rod 1.2 is located inside the hollow auger 4, so the resistance of the soil to manual rotation is the same as the resistance at the time of initial press-in and does not increase even if the excavation length is extended. .

Furthermore, since it is a gentle press-fit by manual rotation, it has good straightness.

Furthermore, even if a misalignment occurs, it can be easily corrected by applying an unbalanced force to the handle.

Connecting the hollow auger and digging Next, connect the hollow auger 4, apply axial force, and excavate by rotating the machine.
Since it is press-fitted into the ground along the hollow auger, there will be no deviation due to play in the hollow auger connection when it falls due to its own weight.

Exploration (Figure 4) If the tip of the guide rod hits a buried object with a strength different from the soil, the manual response will change.

In this case, pressure air is ejected from the tip, and the earth and sand around the tip has been removed, making it easy to feel the response to the buried object.

In this state, the earth and sand around the buried object is removed using sufficient air pressure, and the guide rod is moved back and forth repeatedly, allowing the material to be estimated from the degree of contact, difference in resistance, and degree of rebound.

Furthermore, if you remove the swivel 6, there will be a flow path 14.23 inside the rod.
23.14, it is possible to insert a known fiberscope into the channel 23.14.

In this way, the appearance of the buried object exposed at the tip can be seen with the naked eye, and the material of the object can be determined with certainty.

Effects of the Present Invention As described above, the method of the present invention involves drilling a hole in the ground using a guide rod inserted by manual rotation and a hollow auger driven by mechanical power fitted to the outer periphery of the guide rod. Pressurized air is ejected from the road to expose the buried object, and the quality of the buried object is judged by the feeling of rebound or by looking at it with the naked eye.

Therefore, the following effects can be expected.

A simple combination of a part of the hollow auger and a guide rod enables manual exploration to deep areas.

〉The guide rod is silently propelled by human senses, so it does not damage buried objects.

(kuha) The guide rod does not need to be used to remove earth and drill holes (the blades only cut into it, so even if it goes deep, the resistance when screwing in is not that great).

The pressurized gas ejected from the tip can remove earth and sand around the buried object and expose the buried object.

Therefore, the quality of the material can be easily determined just by applying the tip of the guide rod lightly and observing the resistance and rebound.

Kuho> Furthermore, if you insert a fiberscope and observe using the pressure air flow path, you can directly judge the material etc. of the buried object with the naked eye, making it possible to make a better judgment.

<H> The accurate direct advancement without the mechanical force of the mechanical force and centrifugal force is understood by the mechanical force and centrifugal force, which is rarely affected by the mechanical force along a lightweight manual guide rod that can be accurately pressed underground. It is possible to perform drilling while maintaining the

Although several complex and expensive devices have been developed for drilling holes across roads, railroad tracks, etc., the device of the present invention combines a manual guide rod with a mechanically driven hollow auger. The device is simple, inexpensive, and requires no skill to operate.

[Brief explanation of drawings]

1 to 4 2 Explanation of the construction sequence of an embodiment of the drilling device according to the present invention Diagram 1: Tip rod 2: Extension rod 3: Manual handle 4. Hollow auger 5: Drive part

Claims (2)

[Claims] (1) Manually press the guide rod located inside the mechanically driven hollow auger into the ground while spouting fluid from the tip of the guide rod at appropriate times, and then press fit the mechanically driven hollow auger along the guide rod. Exploration of buried objects, drilling method (2) Consisting of a guide rod with an auger at its tip that is press-fitted into the ground by manual rotation, and a mechanically driven hollow auger fitted around the guide rod's outer periphery, fluid is ejected from the tip of the guide rod. Buried object exploration and drilling equipment configured to obtain