JP4784870B2 - Underground exploration equipment - Google Patents

Description

  The present invention is an underground exploration device for exploring buried objects before the main excavation in the ground so that even a gravel mixed layer or compacted earth and sand can enter easily. Related to the underground exploration equipment.

  Conventionally, when installing utility poles, roadside trees, etc. on the ground, it is necessary to perform exploration excavation of buried objects in the planned excavation area before the main excavation. This exploration excavation of buried objects is carried out to confirm whether there are buried objects such as gas pipes and water and sewage pipes in the planned excavation area, and a high-pressure fluid is used as a representative one. Things are known.

  Therefore, Patent Document 1 is referred to as a conventional technique. In this underground exploration device, a nozzle is fixed to the tip of a pipe, and a plurality of exploration rods configured to eject high-pressure water from the tip of the nozzle are connected in parallel to each other by a rectilinear plate. It has a structure in which an auxiliary plate is fixed on the outside. Moreover, this patent document 1 describes a structure in which nozzle nozzles are formed flat along a straight plate.

Furthermore, in the underground exploration device of Patent Document 2, a plurality of exploration rods having injection nozzles for ejecting high-pressure fluid are arranged in parallel by a coupling plate, and the leading edge of the coupling plate provided at the distal end portion of the exploration rod is convex. Or it has the structure formed in the concave shape, or the structure which provided the blade in the front-end | tip edge part of the connection board.
Japanese Patent No. 3196066 Japanese Patent No. 3597335

  According to the underground exploration device described in the above-mentioned Patent Document 1, it is possible to expand the exploration range of underground objects with a straight plate or auxiliary plate coupled between exploration rods. It is possible to obtain an underground exploration device with excellent verticality and straightness, but the distance between the exploration rods on both sides is widened by the rectilinear plates connected between the exploration rods. When hitting gravel, there was a possibility that it could not enter the ground any more, or the excavation speed for exploration became slow.

  Further, according to the underground exploration device described in Patent Document 2, the gravel in the ground has the advantage of moving along the slope of the convex connecting plate, but it takes time to move the gravel, There was an inconvenience that the drilling speed for exploration was slow.

  Furthermore, in the structures of Patent Documents 1 and 2, since the nozzle height of each exploration rod is the same, when gravel hits the tip of one exploration rod, only the effect of high-pressure water on that exploration rod However, this is only effective for the movement of gravel, and the overall excavation speed is slow.

  The present invention has been made in view of the above circumstances, and when performing exploration excavation of a buried object before main excavation in the ground, gravel and the like are not obstructed by gravel mixed layers and compacted earth and sand. An object of the present invention is to provide an underground exploration device that can improve the excavation speed for exploration by allowing easy entry.

In order to achieve the above object, in the underground exploration device according to claim 1 of the present invention, one or a plurality of short tubes are fixed to the side of the long tube constituting the tip of the exploration rod. In addition, nozzles for injecting high-pressure water are provided at the ends of the long tubes and the respective short tubes, and the nozzles of the short tubes are provided at a high position separated from the nozzles of the long tubes that enter the ground first. In the underground exploration apparatus, an injection port comprising an elongated flat hole provided in the nozzle of the long tube is formed elongated in the direction in which the short tube is provided, and the nozzle of the short tube The hole of the injection port which consists of an elongate flat hole provided in is elongated in a direction different from the direction of the elongate flat hole provided in the nozzle of the long tube .

  The underground exploration device of the present invention softens the soil using high-pressure water ejected from the nozzle of the long tube or the short tube, and the long tube and the short tube constituting the tip of the exploration rod in the softened soil Is pushed into the ground by hand, so there is no excessive entry into the soil as in mechanical work, and there is very little risk of damaging buried objects. Therefore, it is possible to dig safely using the exploration device even in the underground where there are dangerous buried objects such as gas pipes and water pipes.

  Moreover, in the underground exploration device of the present invention, during excavation, the soil is first softened by the high-pressure water ejected from the nozzle provided in the long pipe that enters in advance, and the long pipe enters the softened soil. This increases the excavation speed. In addition, the underground exploration device of the present invention is provided with a short tube nozzle at a high position apart from the long tube nozzle that enters the ground first, so that the soil softened by the long tube Short pipes enter easily, and the soil is softened by the high-pressure water ejected from the nozzles of each short pipe, making it possible to enter the gravel-mixed layers and compacted sediment without being disturbed by gravel. The excavation speed of the whole underground exploration device becomes faster.

  Further, in addition to the configuration in which the short tube enters after the long tube that has entered prior to the ground as described above, the injection port including the elongated flat hole provided in the nozzle of the long tube and the short tube After the high-pressure water is jetted from the nozzle of the preceding long pipe, the short pipe is formed by forming the injection port formed of a long and narrow flat hole provided in the nozzle of the pipe in different directions. Since high-pressure water is jetted from different nozzles in different directions, the softening range of the soil can be widened.

  Further, in the present invention, the excavation range can be expanded by the configuration in which the long tube and the short tube are coupled by the connecting plate, and the configuration in which the auxiliary plate is coupled to the outside of the short tube.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1A and 1B, the underground exploration device 1 according to the present invention has one or more short tubes 3 coupled to the side of the long tube 2, and the long tube 2 And nozzles 4a and 4b for injecting high-pressure water at the tip of each short tube 3, and the nozzle 4b of the short tube 3 is provided at a high position apart from the nozzle 4a of the long tube 2 that enters the ground first. It has the structure comprised.

  The underground exploration device 1 will be described in detail. The underground exploration device 1 shown in FIGS. 1 (a) and 1 (b) shows one embodiment of the present invention. The connecting plates 5 and 5 are fixed to each other, and the short tubes 3 are provided one by one through the connecting plates 5 and 5, and the auxiliary plates 6 and 6 are provided on the sides of the short tubes 3 and 3 on both sides. It is set as the structure formed by fixing. A long steel pipe (not shown) constituting an exploration rod is connected to a connection port 9 provided at the rear end (corresponding to the upper end in FIG. 1) of the long pipe 2 and is not shown via the steel pipe. When high pressure water is supplied through a hose or the like connected to the high pressure pump, nozzles 4a, 4b, 4b provided at the tips of the long tube 2 and the short tube 3 are ejected from the outlets 7a, 7b. , 7b are ejected radially.

  In the above configuration, the long pipe 2 is a long steel pipe, the short pipe 3 is a short steel pipe, and the difference in length between the two is the difference in the amount of protrusion between the long pipe 2 and the short pipe 3. The difference between the height of the nozzle 4a provided in the long tube 2 and the nozzle 4b provided in the short tube 3 is caused. The height difference h is determined by the performance of the nozzle, the pressure and flow rate of high-pressure water, and is preferably about 5 to 20 cm depending on the relationship between the so-called nozzle spray pressure and spray height.

  Further, in this embodiment, the injection port 7a made of a long and thin flat hole provided in the nozzle 4a of the long tube 2 and the injection port 7b made of a long and thin flat hole provided in the nozzle 4b of the short tube 3 are used. Are formed in different directions. As shown in FIG. 2 (a), the nozzles 4a and 4b provided in the long tube 2 and the short tube 3 are formed with injection holes 7a and 7b made of elongated flat holes at the tips of the nozzles 4a and 4b. The direction of the injection port 7a of the nozzle 4a of the long tube 2 is formed in the horizontal direction, and an angle of about 90 degrees is provided with respect to this, and the injection ports 7b and 7b of the nozzles 4b and 4b of the short tube 3 on both sides Formed.

  Moreover, what is shown in FIG.2 (b) makes the direction of the injection port 7a of the nozzle 4a of the center long tube 2 into the horizontal direction, and the injection port 7b of the nozzles 4b and 4b of the short tube 3 on both sides of this. 7b is formed with an angle of approximately 45 degrees.

  2 (a) or 2 (b) described above are two examples in which the injection port 7a of the nozzle 4a of the long tube 2 and the injection port 7b of the nozzle 4b of the short tube 3 are formed in different directions. In each case, the high pressure water injection ranges 10a and 10b are elongated flat surfaces formed on the nozzles 4a and 4b. The nozzles 7a and 7b each having a cylindrical shape are radially elongated. 2A and 2B, the injection range by the injection port 7a of the nozzle 4a of the long tube 2 is 10a, and the injection range by the injection port 7b of the nozzle 4b of the short tube 3 is 10b.

  In the process of making the underground exploration apparatus configured as described above enter the ground while manually swinging it up and down, first, when the underground gravel hits the tip of the long pipe 2, the nozzle 4 a of the long pipe 2. The high pressure water sprayed from the softening soil softens, and the tip of the long tube 2 repeatedly collides with the gravel, so that the gravel moves to the softening site of the soil, and the short tube 3 coming from the rear of the long tube 2 The high-pressure water ejected from the nozzles 4b and 4b softens the soil in the vicinity of the gravel, and the gravel is further pushed away by causing the tip of the short tube 3 to collide with the gravel. Such an action enables excavation of gravel contained in the ground without hindering the entry of the underground exploration device, which is beneficial for improving the excavation speed. If the underground exploration device hits a buried object such as a gas pipe or a water and sewage pipe, or a cobblestone or a large gravel, the underground exploration device will not advance any further even if it is pushed down. It can be judged that there is.

Furthermore, as shown in FIGS. 1A and 1B, in the present invention, the long tube 2 and the short tube 3 are connected by the connecting plate 5, and the auxiliary plate 6 is provided outside the short tube 3. A combined configuration can be provided, and the excavation range can be expanded. In such a configuration, the width of the connecting plate 5 or the auxiliary plate 6 is preferably provided in a range up to twice the tube diameter of the long tube 2 or the short tube 3.

  Here, various forms of the underground exploration device 1 configured based on the present invention as described above will be described with reference to FIGS. In FIG. 3A, one short tube 3 is provided on the side of one long tube 2, and the long tube 2 and the short tube 3 are short connecting plates 5. Are combined. In addition, what is shown to this Fig.3 (a) is set as the structure which connected the said long tube 2 and the short tube 3 to the connection body 8 couple | bonded with the connection port 9. FIG.

  Further, in FIG. 3 (b), one long tube 2 is provided with one short tube 3, 3 on each side, and one long tube 2 and two are provided. The short tubes 3 and 3 are joined by direct welding or the like without being joined by a connecting plate. The configuration shown in FIG. 3B also has a configuration in which the long tube 2 and the short tubes 3 and 3 are connected to a connecting body 8 connected to the connection port 9.

  Further, in FIG. 3C, short tubes 3 and 3 are provided on both sides of one long tube 2 via connecting members 8 and 8, respectively. The tube 2 and the two short tubes 3 and 3 are connected by a connecting plate 5.

  3 (d) is one in which short tubes 3 and 3 are provided on both sides of one long tube 2 via connecting bodies 8 and 8, respectively. The tube 2 and the two short tubes 3, 3 are coupled by connecting plates 5, 5, and auxiliary plates 6, 6 are coupled to the outside of the short tubes 3 on both sides.

  In addition to the embodiments shown in FIGS. 3 (a) to 3 (d), the present invention can have various configurations obtained by further combining the above configurations. 3A and 3B, the short tube 3 is formed of a relatively long steel tube, and in FIGS. 3C and 3D, the short tube 3 is formed of a relatively short steel tube. But this is an example.

  The underground exploration device of the present invention can easily enter a gravel mixed layer or compacted earth and sand without being obstructed by gravel when excavating buried objects before main excavation in the ground. By doing so, it can be used as an underground exploration device that can improve the excavation speed for exploration.

(a) shows the side surface of the underground exploration device in the embodiment of the present invention, (b) is a diagram showing the end surface of the state of looking up the device of (a). The state which formed the injection port which consists of the elongate flat hole of the nozzle provided in the long tube and the short tube of the underground exploration apparatus in the Example of this invention in the different direction is shown, (a) is about 90 degree | times. Shows a different situation, and (b) shows a situation different by about 45 degrees. (A)-(d) is a side view which shows the various form of the underground exploration apparatus by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Underground exploration device 2 Long tube 3 Short tube 4a, 4b Nozzle 5 Connecting plate 6 Auxiliary plate 7a, 7b Injection port 8 Connection body 9 Connection port 10a, 10b Injection-shaped high pressure water

Claims (1)

One or a plurality of short tubes are fixed to the side of the long tube constituting the tip of the exploration rod, and a nozzle for injecting high-pressure water is provided at the ends of the long tube and each short tube. In the underground exploration device in which the nozzle of the short tube is provided at a high position separated from the nozzle of the long tube entering in advance into the ground,
An injection port composed of an elongated flat hole provided in the nozzle of the long tube is formed in an elongated direction toward the direction in which the short tube is provided, and an elongated flat shape provided in the nozzle of the short tube. An underground exploration device characterized in that a hole of an injection port composed of a hole is elongated in a direction different from a direction of an elongated flat hole provided in a nozzle of the long tube .