JPH0322351Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is used to excavate underground by filling it with muddy water and replace it with a hardening muddy material such as concrete. The present invention relates to an improvement in a device for treating slime deposited in an excavated vertical trench prior to replacing hardening mud with muddy water.

The so-called muddy water excavation method has been known in the past, in which an excavated vertical trench is filled with muddy water, and while preventing the trench from collapsing, the muddy water replaces hardening muddy materials such as concrete to construct underground continuous walls. ing.

In this type of construction method, in order to ensure the mechanical strength of the hardening mud after hardening, or to ensure the joint strength with the existing underground structure,
Slimes that accumulate in the excavated vertical trenches are removed.

The slime removal device is a device that suspends a submersible pump with a suction port at the lower end in a vertical groove filled with muddy water, and drives it from the ground to suck up and discharge the slime, or a device that uses this submersible pump. A device in combination with a rotationally driven stirring device has been used conventionally because it is relatively simple.

However, these processing devices had the following drawbacks. In other words, in the former device in which the submersible pump is suspended, the range that can draw in from the suction port of the submersible pump is limited, so it must be moved sequentially within the groove, making the operation complicated and However, there was a problem that the slime accumulated at the bottom corner of the vertical groove could not be completely removed because the suction force was relatively weak.

On the other hand, in a device that combines a rotationally driven stirring device and a submersible pump, the accumulated slime is disturbed by the stirring device, so there is relatively no problem in terms of slime removal. When a swirl vane is used, if it accidentally comes into contact with a vertical trench or an existing underground structure during movement, there is a risk of damaging the trench wall or existing structure, or conversely damaging the device.

To avoid this, it is conceivable to provide a cover on the device or to restrict its movement, but this would make the entire device larger and more complex.

This idea was made in view of the problems of conventional slime processing equipment as described above, and its purpose is to remove accumulated slime from trench walls and existing underground structures even with a relatively simple configuration. To provide a slime processing device that can be used without damaging objects.

In order to achieve the above object, this invention provides a device for sucking up and discharging slime deposited at the bottom in an excavation vertical groove filled with muddy water, which includes a stirring device disposed at the bottom side of the excavation vertical groove, and a stirring device disposed at the bottom side of the excavation vertical groove. The agitation device includes a cylindrical case, a rotating nozzle that is rotatably supported by the case, and a rotating nozzle that is installed in the rotating nozzle to supply pressurized fluid. The suction/discharge device has an injection port that injects downward, and a spiral swirl blade that is attached to the rotating shaft of the swirl nozzle and that receives the pressurized fluid and rotates the swirl nozzle. It is characterized by having a pump that sucks the volumetric slime disturbed by the nozzle, and a pipe that discharges the slime sucked by the pump to the ground side.

Hereinafter, preferred embodiments of this invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of the slime treatment method according to this invention.

The slime processing apparatus shown in the figure has a vertical groove 14 excavated underground 10 and almost filled with muddy water 12.
It is composed of an agitation device 20 and a suction/discharge device 44 that are suspended inside, and the suction/discharge device 44 is located above the agitation device 20.
The stirring device 20 is located near the bottom 14a of the vertical groove 14.

The stirring device 20 includes a cylindrical case 22 having openings at the upper and lower ends, a plurality of inlet holes 24, 24 and a center hole 26 that close the case 22 in the radial direction, and a center hole 26 at the upper end of the case 22. A large-diameter disk-shaped locking piece 30 is fixed to the upper end of the partition wall 28 fixed to the vicinity of the opening, passes through the central through-hole 26, and a hollow disk member 32 is fixed to the other end. Swivel vane 34
A plurality of outlet holes 38, 38 are bored in the side surface of the disk member 32, and the lower end thereof passes through the lower end opening of the case 22 and branches into a bifurcated shape. A pair of injection ports 4 bent downward at the end and formed into a narrow nozzle shape at the tip end.
A rotating nozzle 40 made of a hollow body with a diameter 0a is fixed thereto.

Further, the upper end opening of the case 22 has a vertical groove 1.
A pipe 42 extends to the upper end of the pipe 42 and introduces fluid pressurized by a pump or the like into the case 22, specifically water, air, etc., and supports the case 22.
One end is fixed.

On the other hand, the suction/discharge device 44 is composed of a submersible pump 46 which is rotated electrically from the ground, and a discharge pipe 48 which sends out the slime 50 sucked by the submersible pump 46 to the ground.

In the slime processing apparatus having the above-described configuration, when water pressurized to a predetermined pressure is supplied from the ground through the end of the pipe 42, this pressurized water is introduced into the case 22 through the pipe 42. , collides with the swirl vane 34 through the inlet holes 24, 24.

As a result, the swirl nozzle 40 is rotated in the direction of arrow A, and the pressurized water after colliding with the swirl vane 34 passes through the outlet holes 38, 38 as shown by arrow B to the swirl nozzle 40. It is injected downward from the tip injection port 40a.

Therefore, the pressurized water injected from the injection port 40a while swirling collides with the slime 50 deposited on the bottom 14a of the vertical groove 14 and disturbs it.

The disturbed slime 50 is then sucked into the lower end suction port 46a of the submersible pump 46 and discharged to the ground via the discharge pipe 48.

In the slime treatment device having the above-described configuration, the pressurized water is jetted in a conical shape that increases in diameter as it goes downward while being swirled by the swirling nozzle 40, so that it is possible to disturb the accumulated slime 50 over a relatively wide range. In addition, since the pressurized water is accelerated by the nozzle-shaped injection port 40a and collides with the deposited slime 50, it is also possible to disturb the slime 50 that has become relatively hard over time.

In addition, since the pressurized water is injected in a nozzle shape from the injection port 40a, the diameter of the rotating nozzle 40 can be made small with some margin given the width of the vertical groove 14, so there is a risk that the rotating nozzle 40 will come into contact with the groove wall and damage the groove wall. The accumulated slime 50 at the corners of the vertical groove 14 can be effectively disturbed and discharged by the suction/discharge device 44.

Furthermore, the drive source of the stirring device 20 is only pressurized fluid, which causes the swirling blades 34 to rotate the swirling nozzle 40 and the injection port 40a.
Since the deposited slime 50 is injected and disturbed, the device can be made relatively simple and compact.

Incidentally, the diameter of the above-mentioned turning nozzle 40 may be smaller than the width of the vertical groove 14, and it is of course possible to use a plurality of turning nozzles having different diameters.

Moreover, the number of nozzle-shaped injection ports 40a is not limited to one pair, but the rotating nozzle 40 may be provided with a plurality of pairs.

As explained in detail in the embodiments above, the slime processing device according to the present invention has a relatively simple structure in which a pressurized fluid is driven to rotate, and a stirring device that injects this fluid is combined with a suction/discharge device. Therefore, the accumulated slime can be removed without adversely affecting the trench walls, etc., and thereby the mechanical strength of the underground structure formed by the muddy water excavation method can be ensured.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing an embodiment of a slime processing apparatus according to the present invention, and FIG. 2 is an enlarged cross-sectional view of section A thereof. 10...Underground, 12...Muddy water, 20...Agitator, 22...Case, 24...Inlet hole, 26...
... Center through hole, 28 ... Partition wall, 30 ... Locking piece, 3
2...Disk member, 34...Swirling vane, 36...Rotating shaft, 38...Outlet through hole, 40...Swivel nozzle,
42...pipe, 44...suction/discharge device, 46
...Underwater pipe, 48...Discharge pipe, 50...
Slime.

Claims (1)

[Scope of utility model registration request] A device for sucking up and discharging slime deposited at the bottom in an excavation vertical groove filled with muddy water, comprising: a stirring device disposed on the bottom side of the excavation vertical groove; and a suction/discharge device disposed above the stirring device. and
The stirring device includes a cylindrical case, a rotating nozzle rotatably supported by the case, an injection port provided in the rotating nozzle and configured to inject pressurized fluid downward, and a rotating shaft of the rotating nozzle. The suction/discharge device includes a helical swirling vane attached thereto that receives the pressurized fluid and rotates the swirling nozzle, and the suction/discharge device includes a pump that sucks the volumetric slime disturbed by the swirling nozzle; A slime processing device comprising: a pipe for discharging the slime sucked by a pump to the ground side.