JP2004316237A - Survey hole excavating equipment for underground buried structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently excavate a survey hole in a short period of time while making the most of the advantage of hydraulic excavation, wherein there is little fear of damage to an underground buried structure. <P>SOLUTION: In survey hole excavating equipment for the underground buried structure, a cylindrical excavating implement body 1, wherein a pressurized water injection nozzle 3 is provided on the side of a leading end, is mounted on a trestle 5 in a vertically placed state; a suction pipe 6 is positioned in the body 1; a jet of pressurized water 17 is emitted from the nozzle 3 into ground to be excavated, while the body 1 is rotated; the ground is hydraulically excavated; the body 1 is sequentially inserted into a formed excavated hole 9; and concurrently with that, slurry/sediment 18 in the body 1 is sucked in for elimination by the suction pipe 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground object exploration hole excavation apparatus, and more particularly, to an underground object exploration hole excavation apparatus capable of rapidly forming an investigation hole in the ground without damaging the underground object.
[0002]
[Prior art]
When performing various types of civil engineering work, it is necessary to know the position, depth, shape, etc. of various underground objects such as gas pipes, water pipes, and various cables accurately in advance. The underground burial was confirmed by excavating the area where the area is expected to be open or drilling an exploration hole. Exploration holes are relatively widely used recently because they can be formed at relatively low cost and in a short period of time as compared with excavation in the whole area, and there is almost no possibility of damaging underground objects. Excavation of this exploration hole is generally performed by the following procedure.
[0003]
That is, after the approximate position of the underground object is grasped by an electromagnetic wave detecting device or the like, the hydraulic excavation by the jetting of pressurized water and the suction of muddy water and soil are repeatedly performed to obtain a vertical diameter of an appropriate diameter from the ground surface. A hole is formed and a casing pipe is built in this vertical hole for mountain retaining.When the lower end of the casing pipe reaches the position of the underground object, the soil, muddy water and muddy water in the casing pipe are completely removed by suction. The underground objects were visually checked from above the ground surface through pipes and their positions, depths, shapes, etc. were measured.
[0004]
[Problems to be solved by the invention]
In conventional excavation of underground object exploration holes, hydraulic excavation by jetting, installation of casing pipes for ridges, and suction and removal of muddy water and soil cannot be performed at the same time. When performing one, the other work had to be suspended, which hindered the improvement of work efficiency. In this case, the hydraulic excavation by jetting is often performed by an operator directly holding the pressurized water nozzle by hand, which is extremely inefficient. However, hydraulic excavation by jetting is the best excavation method at present because there is almost no risk of damaging underground objects. Even if there is a problem in terms of work efficiency as described above, it must be adopted. Was.
[0005]
The inventor of the present invention has studied a means of efficiently drilling an exploration hole in a short time while taking advantage of hydropower drilling that there is almost no possibility of damaging an underground object, and as a result, a new underground object exploration hole has been studied. The drilling rig has been successfully developed and is proposed here as the present invention.
[0006]
[Means for Solving the Problems]
An excavator body 1 having a cylindrical shape and having a pressurized water injection nozzle 3 on the tip side is mounted vertically on a gantry 5, and a suction pipe 6 is positioned in the excavator body 1. While rotating, pressurized water 17 is injected from the pressurized water injection nozzle 3 toward the ground to be excavated so that the ground can be hydraulically excavated, and the drilling tool body 1 is sequentially inserted into the formed excavation hole 9, and at the same time, The above problem has been solved by allowing suction water to remove muddy water and earth and sand in the excavating tool body 1 by the suction pipe 6.
[0007]
Embodiment
Hereinafter, an embodiment of an underground object exploration hole excavating apparatus according to the present invention shown in the drawings will be described. FIG. 1 is a side view of the whole, and FIG. 2 is an enlarged perspective view of an excavating tool main body 1 portion which is a main part thereof. In the figure, 1 is an excavating tool main body, which is made of a rigid metal having a cylindrical shape. A plurality of pressurized water jet nozzles 3 are attached to the end face 2 of the peripheral wall on the front end side in the longitudinal direction at intervals. In this embodiment, four pressurized water jet nozzles 3 are provided, but the number is not limited to four. A pressurized water supply passage 4 is formed within the thickness of the peripheral wall, and pressurized water 17 is supplied from an external supply source (not shown) via a pressurized water supply pipe 16. In the above-described embodiment, the pressurized water injection nozzle 3 is provided integrally with the peripheral wall end surface 2 of the excavator main body 1, but as shown in FIG. The pressurized water injection nozzle 3 may be provided separately. On the other hand, reference numeral 5 in the figure denotes a mount on which the excavating tool main body 1 is mounted. This can be slid in the direction, that is, in the vertical direction. Further, a suction pipe 6 having a suction opening 10 at the lower end expanded in a trumpet shape is inserted into the inner diameter of the excavating tool main body 1, and the suction pipe 6 can be manually lifted by an operator as necessary. It has become.
[0008]
This embodiment has the configuration as described above. As shown in FIG. 1, the gantry 5 is stably mounted on the ground surface 7 where the underground object exploration hole is to be excavated. When the pressurized water 17 is vigorously jetted from the pressurized water jet nozzle 3 toward the ground surface 7 while rotating the excavating tool main body 1 by the drive mechanism 14, as shown in FIG. The recess 7 is formed by hydraulic excavation. Further, as shown in FIG. 5, the lower end of the excavating tool main body 1 is inserted into the recess 8, and the excavating tool main body 1 is clamped. Excavation is continued to form a cylindrical search hole 9. At this time, the muddy water and the earth and sand 18 generated by the injection of the pressurized water 17 are continuously sucked and discharged by the suction pipe 6 inserted into the excavation tool main body 1, but have a size that cannot be discharged through the suction pipe 6. When the pebbles 13 appear, as shown in FIG. 6, the pebbles 13 are vacuum-adsorbed by the trumpet-shaped suction port 10 of the suction pipe 6, the suction pipe 6 is pulled up as it is, and the excavator body 1 is opened from the upper end opening thereof. If removed, the gravel 13 can be easily removed.
[0009]
After digging the exploration hole 9 to the position of the underground object 11 in this way, muddy water and soil 18 remaining in the excavating tool body 1 are sufficiently removed by the suction pipe 6, and then the suction pipe 6 is removed. When it is lifted and removed from the excavation tool main body 1, as shown in FIG. At this time, the drilling tool main body 1 is built in the search hole 9 and performs the function of a casing pipe, whereby the ground of the search hole 9 is retained and is kept in a stable state. In this state, the underground object 11 is visually checked from the opening at the upper end of the excavator main body 1, and its depth, position, shape, and the like are measured. After these operations are completed, if the drilling tool main body 1 is pulled out and the search holes 9 are backfilled, all the series of operations is completed.
[0010]
【The invention's effect】
The underground object exploration hole drilling device according to the present invention has the above-described configuration, and includes a hydraulic excavation of the exploration hole 9, the installation of a casing pipe for retaining, and a suction and removal of muddy water and earth and sand. Since three operations can be performed at the same time, there is an effect that the exploration hole 9 can be formed in a much shorter time and in a minimum space as compared with the conventional excavation operation, and has an extremely high practical value. In addition, since the exploration hole is formed by hydraulic excavation, there is almost no risk of damaging the underground object, and it is possible to easily check the underground object, especially when the underground object is congested. Suitable for civil works in urban areas.
[Brief description of the drawings]
FIG. 1 is an overall side view of an embodiment of an underground object exploration hole drilling apparatus according to the present invention.
FIG. 2 is an enlarged perspective view of a main part of the excavating tool, which is a main part thereof.
FIG. 3 is an enlarged perspective view of another embodiment of the drilling tool main body 1;
FIG. 4 is an enlarged cross-sectional view of a state where excavation by the excavation tool body 1 has been started.
FIG. 5 is an enlarged sectional view of a situation during excavation in the ground by the excavation tool main body 1.
FIG. 6 is an enlarged cross-sectional view illustrating a situation in which gravel 13 having a size that cannot be sucked and that has appeared during excavation is removed.
FIG. 7 is an enlarged cross-sectional view of a situation when the excavation of the exploration hole 9 is completed and the investigation of the underground object 11 is performed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Excavation tool main body 2 Perimeter wall end face 3 Pressurized water injection nozzle 4 Pressurized water supply path 5 Base 6 Suction pipe 7 Ground surface 8 Depression 9 Exploration hole 10 Suction port 11 Underground object 12 Drive mechanism 13 Gravel 14 Drive mechanism 15 Vertical slide mechanism 16 Pressurized water Supply pipe 17 Pressurized water 18 Mud water, earth and sand

Claims (4)

An excavator body 1 having a cylindrical shape and having a pressurized water injection nozzle 3 on the tip side is vertically mounted on a gantry 5, and a suction pipe 6 is positioned in the excavator body 1. While rotating, pressurized water 17 is injected from the pressurized water injection nozzle 3 toward the ground to be excavated so that the ground can be hydraulically excavated, and the drilling tool main body 1 is sequentially inserted into the formed excavation hole 9 and simultaneously. An underground object exploration and excavation apparatus characterized in that muddy water and earth and sand 18 in the excavation tool main body 1 are suctioned out by a suction pipe 6. The underground object exploration hole excavating apparatus according to claim 1, wherein the suction port (10) of the suction pipe (6) has a trumpet-shaped diameter. The underground object exploration hole drilling apparatus according to claim 1, wherein the pressurized water injection nozzle (3) is formed integrally with the drilling tool body (1). The underground buried object exploration hole drilling device according to claim 1, wherein the pressurized water injection nozzle (3) is mounted inside the peripheral wall end surface (2) of the drilling tool main body (1).

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