JPS5826120A - Excavating and scooping device for inside of steel pipe pile - Google Patents

Abstract

PURPOSE:To make compact an excavating and scooping device for the inside of steel pipe piles by housing a jet injector for scooping and a jet injector for excavation in a holding cylinder with a guide fin coupling with the inner wall of a steel pipe pile. CONSTITUTION:A scooper 1 is hung down in a steel pipe M until it reaches the bottom of the pile M, and then pressure water and air are supplied to jet injectors 12 and 14 for scooping and excavation. Whereupon, soil and sand at the bottom of the pile 2 are degraded by the impaction of the excavating blade 34 of the holding cylinder 10 and the excavating blade 36 of a guide fin 9 and at the same time the soil and sand are excavated and sent up by jet water from the jet injector 14 for excavation. On the other hand, the mixture of soil and water is delivered upwards by suction force resulting from the jet stream from the jet injector 12 for scooping.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excavating and pumping device for discharging slime while excavating the bottom of a vertical hole such as the inside of a steel pipe pile.

Conventionally, to extract slime from inside a steel pipe pile, a packet method was used, or a drill bit or water jet was used in combination with a pump, but the packet method was inefficient, and a drill bit and a pump were used. When used in combination with this method, not only does the entire device become larger, but there are also disadvantages in that excavation accuracy and excavation force are insufficient.

In view of the above-mentioned conventional problems, this invention has been developed to enable stable and powerful slime excavation and pumping with a compact and easy-to-handle device. The explanation is as follows.

Fig. 1 shows the state of use of the device of this invention, in which M is a steel pipe pile, 1 is the device of this invention, 2 is a work base, 3 is its support, 4 is a crawler crane, and this device 1 is suspended within a steel pipe pile M by a crawler crane 4 via a shear wire rope 5. This invention device 1 includes a pump P1.
Pressure water is supplied from P2, and the slime excavated within the steel pipe pile M is pumped up and discharged to the outside through the pumping pipe 6. 7 is a water tank and 8 pumps.

The overall structure of the apparatus 1 of the present invention is as shown in FIG. 2, and is constructed by inserting an excavation and pumping main body 11 into a cylindrical holding cylinder 10 having guide fins 9. As shown in the same figure and FIG. 3, the excavation and pumping main body 11 has a single large-diameter pumping pipe 6 whose lower part is branched into a plurality of pipes (two in the illustrated example), and these branch pumping pipes 6a, 6a are suspended parallel to each other and opened at the same height position, and a pumping jet injector 1 is installed between the branch pumping pipes 6σr6a at the branching position of the pumping pipe 6.
2 facing upward, and the branch pumping pipe 6a=6
An excavating jet spray body 14 is mounted downward at a position approximately at the same height as the lower end pumping port 13. Short cylindrical caps 15 and 16 are fitted at the top and bottom around the branch pumping pipes 6a, 6a.

The lower cap 16 has a filter 17 attached to the lower side of the pumping port 13 in a sealed state above the pumping port 13, and can be replaced with another cap having a filter with a different mesh size. . Further, the pumping jet 12 and the excavating jet 14 can be attached to and removed from the parts 18 and 19, respectively, and both can be replaced with ones having different injection apertures. These pumping and excavating jet propellants 12
．． 14, air is introduced or pressurized around the injection port, and its structure is shown in FIGS. 6 to 8.

The excavating jet spray body 14 has a large number of spray holes 21 . ..., and a cap head 25 having a large number of injection holes 24 whose injection directions match those of the injection holes 21 is attached to the tip of the protective tube 23. Air is taken in between the doors 22 and 25 from the inlet 26 to both sides. The nozzle head 22 and the cap head 25 are detachable from the high-pressure water pipe 20 and the protection pipe 23, respectively, and can be replaced with ones having a different spray angle by 0. On the other hand, the pumping jet 12 has a single-hole nozzle head 28 attached to the tip of a high-pressure water pipe 27, and increases air between the nozzle head 28 and the protection pipe 30 from the air intake port 29. It's a trap to let you in. The guide pipe 31 provided on the ejection side of the excavating jet ejection body 14 is detachable and can be replaced with one having a different protrusion length.

9 and 10 show the structure of the holding cylinder 10 and the guide fins 9. FIG. This holding cylinder 10 has a cylindrical shape, and is connected to the main body 11 by receiving the whole of the excavation and pumping main body 11 at a step 32 on the lower inner wall, and is suspended from the wire rope 5 through the suspension hole 33. A digging blade 34 is formed at the lower edge of the holding cylinder 10. The guide fins 8 protrude radially from the holding cylinder 10, and in the illustrated example, four guide fins 8 are attached to the outer wall of the holding cylinder 10 with mounting pieces 41. It is attached by... Each guide fin 9 is removable and can be replaced with another guide fin with a different protrusion width, and can also be installed upside down.
36 are formed. 37 and 38 are holes drilled at equal intervals for mounting the guide fins 9. Furthermore, guide fin 9
When the protruding width of the guide fin 9 is wide, an excavating jet ejector 39 may be attached to the surface of the guide fin 9, as shown in FIG.

This jetting body 39 may be the same as that in the excavation and pumping main body 11. In FIG. 2, 4o is a pumping inner pipe, which can be replaced with one having a different diameter depending on the capacity of the pumping jet 12.

A supply pipe and an air supply pipe for supplying pressurized water to each of the pumping and excavating jet projectors 12.14 are drawn into the holding cylinder 10 from above and connected to each projector 12.14.

In the above configuration, when the entire device 1 is suspended into the steel pipe pile M as shown in FIGS. 1 and 2, the guide fins 9.
Since the device 1 is guided by ..., it descends without any sideways movement, and the excavation and pumping main body 11 is held at the center position of the steel pipe pile M.

When the device 1 reaches the bottom of the steel pipe pile M, pressurized water and air are supplied to the pumping and excavating jet propellant 12.14. The earth and sand at the bottom of the pile are crushed by the impact of the excavator 36, and the earth and sand are dug up and rolled up by the water jetted from the excavation jet 14, thereby carrying out excavation.

The mixture of soil and water thus generated is sucked into the pumping port 13 by the suction force associated with the jet jet of the pumping jet propeller 12, and is sucked into the pumping port 13 through the branch pumping pipe 6a and the pumping pipe 6. is carried upwards through the

When the diameters of the steel pipe piles M are different, the guide fins 9 are replaced with ones having different protruding widths, so that an excessively wide gap does not occur between the inner wall of the steel pipe pile M and the guide fins 9. Further, the head (in the illustrated example, the nozzle head 22 and cap head 25) of the excavating jet spray body 14 is replaced to adjust the widening and narrowing of the sprayed water.

In addition, depending on the hardness and softness of the soil at the bottom of the pile, the excavation jet 12 can be replaced to change the excavation force of the jet water, and the guide fins 9 can be turned upside down or replaced with other ones to make the excavation blade. This changes the shape of the cutting blade and changes the digging force of the cutting blade.

As described above, this invention is constructed by inserting the excavation pumping main body consisting of a branch pumping pipe, a pumping and excavating jet propellant, etc. into a holding cylinder having guide fins. The earth and sand at the bottom of the vertical hole are excavated by the impact from the lower edge of the holding cylinder and the jet from the excavation jet propeller, and the earth and sand is sucked and pumped up from the pumping port. Can be done efficiently.

In addition, the main body of excavation, the main body for pumping up the hole, is always positioned at the center of the vertical hole by guide fins and does not oscillate laterally, so water can be sprayed precisely at the required location on the bottom of the hole, powerfully and quickly. Can be excavated. In addition, since the excavation and pumping main body is covered with a holding cylinder, there is no risk of damage to fragile parts such as pressurized water and air supply pipes, and there is little chance of breakdowns.

In addition, as shown in the example shown in the figure, if the drilling jet is configured to use the negative pressure generated around the injection port to suck air at 4 degrees or to forcefully feed pressurized air,
Since the jet water is surrounded by an air film and ejected, the rate of energy loss in the water of the jet flow is small, and the digging force is strong.Also, the mixed air infiltrates into the earth and sand, causing it to expand. Similarly, introducing air into a pumping jet will increase its pumping capacity.

In addition, if the guide fins can be exchanged with ones with different protrusion widths, and the head of the excavation jet can be exchanged with ones with different injection angles, it can be used for steel pipe piles and vertical holes with different diameters. Wide range.

If digging blades are provided on the holding tube or guide fin, the impact of these cutting blades can powerfully break down the earth and sand, and it can also be used for excavating hard ground.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the inventive device in use, Fig. 2 is a half sectional view of the same device, Fig. 3 is a sectional view of the main part of the excavation pumping main body,
Figure 4 is a sectional view taken along the line A-A in Figure 3, Figure 5 is a bottom view of the excavation and pumping main body, Figure 6 is a half sectional view of the excavation jet propeller, Figure 7 is its front view, and Figure 8 The figure is a half-sectional view of the jet ejector for pumping up, FIG. 9 is a plan view of the holding cylinder, and FIG. 10 is a cross-sectional view of the holding cylinder. 6... Pumping pipe, 9-... Guide fin,
DESCRIPTION OF SYMBOLS 10... Holding tube, 11... Excavation pumping main body, 12... Jet propellant for pumping up, 13... Pumping port, 14... Jet propellant for excavation, 17... Filter , 22... Nozzle head, 25... Cap head, 26... Air intake, 28... Nozzle head, 29... Air intake, 34.35.36... Excavation blade. Patent Applicant Eiji Mochizuki Agent Patent Attorney Iwaodo Sugimoto Patent Attorney Katsunori Sugimoto Figure 7 Figure 9

Claims (1)

[Scope of Claims] 16 The lower part of the pumping pipe is branched into a plurality of pipes, and a pumping jet injector is installed at the branching position of the pumping pipe, and between the lower end pumping ports of the plurality of branch pipes. a drilling jet injector is attached to each of the branch pumping pipes,
The excavation pumping main body consisting of a pumping jet projector, an excavation jet projector, etc. is charged into a holding cylinder suspended from a hanging device such as a crane, and the material is radially attached to the outer peripheral wall of the holding cylinder. A device for excavating and pumping up inside a steel pipe pile, etc., which is provided with a plurality of protruding guide fins and supplies pressurized water to each of the pumping and excavating jet bodies. 2. Excavation and pumping in steel pipe piles, etc. according to claim 1, wherein the jet jet for drilling and pumping is configured such that air is introduced or pressurized around the injection port. lifting device. 3.Each of the jet propellants for excavation and pumping,
The device for excavating and pumping up steel pipe piles, etc., according to claim 1, which is replaceable with one having a different injection diameter. 4. The device for excavating and pumping up steel pipe piles, etc., according to claim 1, wherein the head of the excavating jet spray body is replaceable with one having a different spray angle. 5. The device for excavating and pumping up steel pipe piles, etc., according to claim 1, wherein the guide fins are replaceable with ones having different protruding widths. 6. The device for excavating and pumping up inside a steel pipe pile, etc., according to claim 1, wherein the guide fin and the lower end of the holding cylinder are provided with an excavating blade. 7. The device for excavating and pumping up steel pipe piles, etc. as set forth in claim 1, wherein the guide fin has excavation blades of different shapes on the upper and lower sides and can be attached to the holding tube upside down. ．． The device for excavating and pumping up a steel pipe pile, etc., according to claim 1, wherein the guide fin is equipped with an excavating jet propellant. 9. The device for excavating and pumping up steel pipe piles, etc., according to claim 1, wherein the mouthpiece of the pumping port is equipped with a filter and is replaceable with one equipped with a filter of a different mesh size.