JP3051326B2 - High-speed mud separation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed muddy water separation apparatus mainly used in a reverse circulation method, which is a type of cast-in-place pile method.

[0002]

2. Description of the Related Art The reverse circulation method is a method of excavating a pile hole of a cast-in-place concrete pile. The hole is filled with muddy water, and the water pressure of the muddy water is used to form a hole wall. Drilling is performed with the drill pid attached to the tip of the drill pipe while protecting, and the excavated soil drilled with the drill pid is sucked up by the pump inside the drill pipe with muddy water and discharged to the water tank installed on the ground . On the other hand, the mud is separated from the excavated soil in the water tank and circulated again in the hole.

[0003] This construction method is efficient because it is not necessary to lift the drill pid to the ground during excavation, and the drill can be continuously excavated. Further, since a casing for protecting the hole wall is not required, a deep pile hole can be excavated, and a large-diameter pile hole can be constructed.

However, the excavated soil sucked up on the ground together with the muddy water is settled in the water storage tank and separated from the muddy water. Therefore, depending on the geology of the excavated ground, the muddy water and the excavated soil are not efficiently separated, and the excavation efficiency is reduced. There were issues such as falling.
Further, when excavating a large-diameter pile hole or a deep pile hole, there is a problem that it is necessary to prepare a considerably large water tank for separating muddy water and excavated soil.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a high-speed muddy water separating apparatus capable of reliably separating muddy water and excavated soil and performing excavation work more efficiently. The purpose is to:

[0006]

SUMMARY OF THE INVENTION A high-speed damping device according to the present invention comprises a support, a casing supported on the support by an up-and-down cylinder so that the inclination can be freely changed, and a lower end of the casing. Installed, first separating means for filtering and separating muddy water and excavated soil contained in the muddy water, and second separating means for vacuum dewatering the excavated soil separated from the muddy water by the first means, A screw rotatably installed in the casing and transferring excavated soil from the first separating means to the second separating means, wherein the first separating means and the second separating means are provided.
The separating means is a screen made of wire mesh around the screw.
And the second separating hand
The screen of the step is meshed with the screen of the first separating means.
It is characterized by being composed of a wire mesh with small eyes.

[0007]

1 and 2 show one embodiment of a high-speed muddy water separating apparatus according to the present invention. In the drawings, reference numeral 1 denotes a cylindrical shape and a hydraulic pressure A casing 4 supported by an up-and-down cylinder 3 such as a cylinder so that the inclination can be freely changed is installed at a lower end portion of the casing 1, and a pump (FIG. The first separating means 7 for separating muddy water and excavated soil sucked together on the ground by the omission) is provided at the upper end of the casing 1,
A second separating means for further separating the excavated soil separated from the mud by the first separating means 4 from the mud by vacuum dewatering;
A screw rotatably installed in the casing 1 and transferring excavated soil from the first separating means 4 to the second separating means 7;
Reference numeral 9 denotes a drive motor that is provided at the lower end of the casing 1 and includes a hydraulic motor that drives the screw 8.

Reference numeral 10 denotes an inlet provided at the lower end of the casing 1 for feeding muddy water and excavated soil sucked together with the pump through the drill pipe 6 to the ground into the first separating means 4. Reference numeral denotes a mud discharge port which is also installed at the lower end of the casing 1 and discharges mud separated from the excavated soil by the first separating means 4 to the water storage tank 12.

The first separating means 4 is constituted by arranging a screen 4a made of a wire mesh or the like around a screw 8, the second separating means 7 is constituted so as to form a vacuum chamber with the periphery sealed. Similarly to the first separating means 4, a screen 7a made of a wire mesh or the like is arranged around the screw 8. In addition, a vacuum hose 13 connected to a vacuum device (not shown) for forcibly dewatering the water in the excavated soil under vacuum is connected to the second separating means 7. The screen 7a has a smaller mesh than the screen 4a.

Next, the operation of the high-speed muddy water separating apparatus according to the present invention will be described. The excavated soil and the muddy water sucked up together in the drill pipe 6 from the drilling hole 5 are supplied to the inlet 10. Is discharged into the first separating means 4, where it is filtered by the screen 4a and separated to a considerable extent into rough excavated soil and muddy water.

The separated muddy water is supplied from a muddy water discharge port 11 to a storage tank.
The water is then discharged from the water tank 12 to the drilling hole 5 again.

On the other hand, the excavated soil separated to a considerable extent from the muddy water by the first separating means 4 is transferred to the second separating means 7 by a screw 8, where the excavated soil is vacuum-dewatered by a vacuum device, and the excavated soil is separated from the excavated soil. Almost completely separated from muddy water. Then, the muddy water is discharged through the vacuum hose 13 into the water storage tank 12, from which the muddy water is circulated again to the drill hole 5. On the other hand, the excavated soil is further transported above the casing 1 by the operation of the stilyu 8, and is discharged from the excavated soil discharge port 13.

[0013]

The high-speed muddy water separating apparatus according to the present invention has the above-described structure, and includes first separating means for filtering and separating muddy water and excavated soil contained in the muddy water. Since it is provided with the second separation means for vacuum dewatering the excavated soil separated from the muddy water, the excavated soil and the muddy water sucked together in the drill pipe from the drilling hole are separated by the first separating means. The excavated soil separated to a considerable extent in the first separation means, and the excavated soil separated to a considerable extent from the muddy water in the first separation means is further separated into muddy water and excavated soil by vacuum dewatering in the second separation means. The excavated soil and the muddy water sucked up together are surely removed, so that the excavation work can be performed more efficiently.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a high-speed muddy water separating apparatus according to the present invention.

FIG. 2 is an explanatory diagram of an example of use of the high-speed muddy water separation device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Casing, 2 ... Support base, 3 ... Undulating cylinder, 4
... First separation means, 5 ... Drilling hole, 6 ... Drill pipe, 7 ...
Second separation means, 8 screw, 9 drive motor, 10
Input port, 11: muddy water outlet, 12: water tank, 13: excavated soil discharge port.

Claims (1)

(57) [Claims] 1. A support base, a casing supported on the support base by an up-and-down cylinder so that the inclination can be freely changed, and installed at a lower end of the casing, and muddy water and excavation contained in the muddy water A first separating means for filtering and separating the soil, a second separating means for vacuum dewatering the excavated soil separated from the mud by the first means, and a first separating means rotatably installed in the casing. and a screw for transporting the excavated soil to a second separation means from the said first separating means
The separating means is a metal mesh around the screw.
And the second component
The screen of the separating means is the same as the screen of the first separating means.
Characterized in that it is composed of a wire mesh with a small mesh
High-speed mud separator.