JPH07269261A - Excavating method for vertical hole, and guide device for setting excavating position for vertical hole - Google Patents

Abstract

PURPOSE:To easily and economically excavate a vertical hole, for which positioning to the ground and direction of excavation are precisely controlled. CONSTITUTION:A guide device 1 for setting excavating position for a vertical hole with an opening allowing a wall surface protection drum 2 to be inserted therein provided and a plurality of sliding contact plates available for contacting with the outside of the wall surface protection drum 2 provided to the inside of the opening with capability of adjusting positions provided is set on the surface of the ground. Then, the wall surface protection drum 2 is erected on the guide device 1 for setting excavating position for the vertical hole so that the lower end thereof can be inserted into the opening of the guide device, and the sliding contact plates are brought into contact with the outside of the wall surface protection drum 2. While the wall surface protection drum 2 is pressed into the ground, earth inside the wall surface protection drum 2 is removed after excavation is made with an excavator 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for excavating a vertical hole from a ground surface to an underground, and more particularly to a method for excavating a vertical hole whose position and excavation direction are accurately controlled.

[0002]

2. Description of the Related Art Conventionally, when a vertical hole such as a manhole is to be excavated from the ground for an underground structure, a space having an appropriate size is formed by excavating and removing earth and sand from the ground in advance. A method is used in which a tubular structure is created and then the gap with the ground is backfilled with earth and sand. However, in such a method, it is necessary to remove a large amount of earth and sand, so that not only the cost is increased, but also the construction period is lengthened and the environment is greatly affected. Therefore, for example, a steel tubular body is press-fitted into the ground from the ground, and the excavation is advanced by a method such as removing the sand and sand inside the tubular body. Methods have been proposed to prevent wall collapse.

[0003]

SUMMARY OF THE INVENTION In this method,
Press-fitting a long tubular body into the ground is not only a large-scale work, but it is difficult to maintain the press-fitting position and the press-fitting direction of the tubular body accurately. There was a problem that it was easy to lose direction. Therefore, an object of the present invention is to provide a simple and economical excavation method capable of forming a vertical hole whose position and excavation direction are accurately controlled with respect to the ground.

[0004]

The method for excavating a vertical hole according to the present invention for achieving the above object has an opening through which a wall protection cylinder can penetrate and can contact the outer surface of the wall protection cylinder. A vertical hole excavation position setting guide device having a plurality of slidable contact members that can be position-adjusted inside the opening is installed on the ground surface, and then the wall protection cylinder has the lower end portion with the vertical hole. The excavation position setting guide device is erected so as to penetrate through the opening of the guide device, the sliding contact member is slidably contacted with the outer surface of the wall surface protection cylinder, and then the wall protection cylinder is press-fitted into the ground and the wall protection cylinder. It is characterized by removing soil in the body.

The vertical hole excavation position setting guide device used in the above method has an opening into which a wall surface protection cylinder for insertion into a vertical hole in the ground can penetrate, and an outer surface of the wall surface protection cylinder. A plurality of slidable contact members that can come into contact with each other are provided inside the opening so that the position can be adjusted, and spikes that can puncture the ground surface are provided so as to project from the bottom surface. It is desirable to be configured so that a load can be applied in order to do so.

[0006]

According to the method of excavating a vertical hole of the present invention, first, the guide device for setting the vertical hole excavation position of the present invention is installed at a planned excavation position of the vertical hole, and if necessary, a load is applied to the edge portion of the guide device. Is loaded and a spike provided on the bottom surface is punctured into the ground surface to securely fix the guide device to the ground surface so as not to easily move even if a force is applied from the lateral direction. After that, a wall protection cylinder for inserting into the vertical hole is erected in the opening of the guide device so as to pass through in a substantially vertical direction, and a sliding contact member provided inside the opening is provided on the outer surface of the wall protection cylinder. Adjust to contact. By doing this, even if the ground exposed inside the wall protection cylinder is excavated and the wall protection cylinder is pressed into the ground at the same time, the position of the wall protection cylinder is regulated and no vertical displacement occurs. The drilling direction of the hole can be accurately controlled.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vertical hole excavating method of the present invention and a vertical hole excavating position setting guide device used therefor will be described with reference to the drawings. In the figure, reference numeral 1 is a guide device for setting the vertical hole excavation position of the present invention, but a substantially circular opening 11 is formed in the center, and a plurality of sliding contact plates 12 are provided so as to surround the opening 11. It is provided. The sliding contact plate 12 is rotatably attached to the tip of an externally threaded rod 13 which is movable in the axial direction by being connected to a handle 14 and rotating, so that the sliding contact plate 12 can be advanced or retracted toward the center position of the opening 11. It is configured to be able to. In addition, an overhanging portion 15 is formed toward the side so that a load can be placed there. Further, a spike 16 is also provided on the bottom surface so that when installed on the ground, the spike 16 punctures the ground to fix the guide device 1. Reference numeral 17 is a level for detecting that the guide device 1 is installed horizontally.

In order to excavate a vertical hole by the method of the present invention, the guide device 1 for setting the vertical hole excavation position of the present invention is installed on the ground E so as to be horizontal, and the overhanging portion 1 is provided if necessary.
A load such as a sandbag is placed on 5 to cause the spike 16 to bite into the ground E, and the guide device 1 is fixed so as not to easily move.

Next, the wall surface protection cylinder 2 is installed in the opening 11 of the guide device 1. The wall surface protection cylinder 2 is made of, for example, a steel annular blade 22 at the tip, that is, the lower end, of a protection cylinder 21 formed of, for example, a concrete pipe or steel pipe reinforced by reinforcing bars.
Is formed by attaching the annular blade 22 to the opening 11
It is erected almost vertically so as to cut into the ground surface exposed from. Then, the handle 14 is rotated to rotate the sliding contact plate 1 respectively.
2 is brought into contact with the outer surface of the wall surface protection cylinder 2, but the purpose thereof is to regulate the positional displacement of the wall surface protection cylinder 2 in the horizontal direction, and does not hinder the penetration of the wall surface protection cylinder 2 into the ground. As described above, it is preferable that the sliding contact plate 12 is lightly brought into contact with the wall surface protection cylinder 2.

The ground exposed inside the wall protection cylinder 2 thus erected is excavated and removed by using an excavator 3 such as an auger, and at the same time, the wall protection cylinder 2 is removed.
Press into the ground. Then, the earth and sand below the wall surface protection cylinder 2 are pushed inward by the annular blade 22 provided at the tip of the wall surface protection cylinder 2, and are easily removed by the excavator 3 to form a vertical hole.

In the excavation of the ground as described above, instead of the method using the auger as described above, for example, by jetting a high-pressure water jet toward the ground surface, the ground surface is dug down and the earth and sand dug up is mud. It may be carried out by a method of digging the ground surface by making the muddy water sucked up to the ground and discharged. Further, it can be carried out by using an appropriate excavating device according to the soil condition of the ground to be excavated and by an appropriate excavation procedure.

[0012]

According to the method for excavating a vertical hole of the present invention, a guide device for setting a vertical hole excavation position having a novel structure is installed on the ground surface, and the position of the wall protection cylinder and the direction of entry into the ground. The vertical holes can be easily formed at precise positions in the ground to regulate the work, which simplifies the work and saves labor, and also shortens the construction period and saves construction costs. is there.

[Brief description of drawings]

FIG. 1 is a conceptual diagram for explaining a method of excavating a vertical hole according to the present invention.

FIG. 2 is a perspective view showing the structure of a vertical hole excavation position setting guide device used in the vertical hole excavation method of the present invention.

[Explanation of symbols]

 E Ground 1 Guide device for setting vertical hole excavation position 11 Opening 12 Sliding contact plate 13 Male screw rod 14 Handle 15 Overhanging portion 16 Spike 17 Level 2 Wall protection cylinder 21 Protective cylinder 22 Annular blade 3 Excavator

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location E21B 17/14

Claims (3)

[Claims] 1. A vertical hole having an opening through which a wall surface protection cylinder can penetrate and a plurality of sliding contact members capable of contacting the outer surface of the wall surface protection cylinder being provided inside the opening so as to be positionally adjustable. The guide device for setting the excavation position is installed on the ground surface, and then the wall protection cylinder is erected so that the lower end portion thereof penetrates through the opening of the guide device for setting the vertical hole excavation position, and the sliding contact member is provided. A method of excavating a vertical hole, which comprises slidingly contacting an outer surface of the wall surface protection cylinder, and thereafter press-fitting the wall surface protection cylinder into the ground and removing earth and sand in the wall protection cylinder. 2. The vertical hole excavating method according to claim 1, wherein a load is applied to the vertical hole excavation position setting guide device to be fixed on the ground surface. 3. A plurality of sliding contact members, each having an opening through which a wall surface protection cylinder for inserting into a vertical hole in the ground can penetrate and contactable with an outer surface of the wall surface protection cylinder, are provided inside the opening. A vertical hole excavation position setting guide device that is provided so that its position can be adjusted and that a spike that can puncture the ground surface is projected from the bottom surface.