JP2003138564A - High fluidity landfill underwater casting equipment - Google Patents

Abstract

(57) [Abstract] [Problem] To improve underwater casting equipment for highly fluid landfill materials (fluidized soil, lightweight soil, etc.). A high fluidity landfill material feeding hose 3 is connected to the upper end of a tremy tubular casting tube 1 suspended by a hanging wire 2, and a large-diameter tip fitting 4 is attached to the lower end thereof. Is extended so that the landfill material is discharged tangentially near the inner surface of the upper half portion of the cylindrical tube portion 6 of the tip fitting 4, so that the discharge energy of the landfill material is rapidly reduced. A rubber plate 10 with an inclinometer 11 is attached to the side discharge port of the tip fitting 4 so as to be rotatable in the vertical direction.
The outer tube 13 and the outer tube 13 may be made expandable and contractible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for pouring a highly fluid landfill material (hereinafter, may be simply referred to as landfill material) into water.

[0002]

2. Description of the Related Art A fluidized soil made of a mixture of soil, water and a solidifying material and a highly fluidized landfill material such as a lightweight soil made of a mixture of soil, water, a solidifying material and a foaming agent. Underwater pouring is often performed using a tremie tubular pouring pipe, but the problem in this case is that the pouring force of the landfill material that flows down the pouring pipe and is discharged from the lower end is used first. The quality of construction is impaired because the landfill material is separated and diffused.

[0003]

In view of the above-mentioned problems, the basic problem to be solved by the present invention (the object of the present invention) is to rapidly reduce the discharge energy of the landfill material at the lower end of the casting pipe. An object of the present invention is to provide a high-fluidity landfill material submersible pouring device that can be weakened to prevent the above-mentioned situation from occurring.

[0004]

In order to solve the above-mentioned problems, in the high-fluidity landfill material submersible pouring device (hereinafter referred to as the device of the present invention) according to the first aspect of the invention, it is suspended by a suspending wire. A high-fluidity landfill material pumping hose is connected to the upper end of the tremie tubular casting pipe, and a large-diameter tip fitting is attached to the lower end, and the lower end of the casting pipe is connected to the cylindrical pipe part of the tip fitting. It is extended so as to be discharged tangentially near the inner surface of the upper half part.

In the apparatus of the present invention, the casting pipe has an expandable and retractable inner / outer double pipe structure (the invention according to claim 2).
It is preferable that a rubber plate with an inclinometer is attached to the side discharge port at the lower end of the tip fitting so as to be vertically rotatable (invention according to claim 3).

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The apparatus of the present invention will be described in detail with reference to the drawings. A tremie pipe placing pipe 1 is suspended by a suspending crane (not shown) with a suspending wire 2 and a high end is provided at its upper end. A fluid landfill material pressure-feeding hose 3 is connected, and a lower end fitting 4 is attached to the lower end.

The tip fitting 4 has a large diameter and comprises a conical tube section 5 and a cylindrical tube section 6, and the lower end section 7 of the casting tube 1 is bent at two points at the tip, as shown, The landfill material flowing down the casting pipe 1 is discharged tangentially near the inner surface of the upper half of the cylindrical pipe portion 6.

Since the lower end portion 7 of the casting pipe 1 is as described above, even when the diameter of the casting pipe 1 is small and the flow velocity of the landfill material flowing down the casting pipe 1 is high. Since the momentum of the landfill material discharged from the tip end opening of the casting pipe 1 is suddenly weakened, separation and diffusion of the landfill material previously cast does not occur.

On both sides of the lower end opening of the cylindrical tube portion 6, a pair of horizontally long iron plates 9 and 9 having rubber plates 8 and 8 attached to their lower edges are fixed in parallel, and these iron plates 9 and 9 are attached. The rubber plates 10 and 10 are attached to the side discharge ports formed at both ends in the longitudinal direction of the rubber plate 10 such that the rubber plates 10 and 10 are rotatable in the vertical direction (arrow directions in the figure). Inclinometers 11 and 11 are mounted on the surface.

The landfill material discharged from the lower end discharge port of the cylindrical pipe portion 6 is pushed out of the side edge of the rubber plate 10 while pushing up the rubber plates 10, 10, and is deposited on the tip metal fitting 4. When the installation height) reaches a predetermined value, the casting pipe 1 is moved upward or sideways. The timing of this movement is determined by the degree of rotation of the rubber plates 10, 10 detected by the inclinometers 11, 11. can do.

The casting pipe 1 shown in the drawing has a double pipe structure in which an upper inner pipe 12 and a lower outer pipe 13 are elastically connected, and the suspension wire 2 is connected to the upper end of the inner pipe 12. The tip fitting 4 is attached to the lower end of the outer tube 13.

Sealing portions 14 and 15 are provided at the lower end of the inner pipe 12 and the upper end of the outer pipe 13, respectively, and pressure water for assisting the expansion of the casting pipe and for preventing backflow of the landfill material is supplied between them. The auxiliary winding wire 18 is stretched between the pulleys 16 and 17 mounted on the inner pipe 12 and the outer pipe 13, respectively, and the casting pipe 1 is wound by winding the auxiliary winding wire 18. It is designed to be contracted (see Fig. 3).

When the placing pipe 1 has the double pipe structure as described above, it is only necessary to laterally move in the contracted state and extend in the moving position, so that the length of the boom that suspends the placing pipe 1 is shortened. Further, since the pouring work can be performed while the height of the high-fluidity landfill material pumping hose 3 is always kept almost constant, the pumping resistance of the high-fluidity landfill material becomes constant. ,
There is an advantage that pulsation can be prevented.

In the figure, 19 is a pinch valve which is opened during driving by air operation and closed during movement, 20 is a pressure gauge for measuring the landfill material discharge pressure, and 21 is the pressure inside the tip fitting 4. Is a check valve that closes when is greater than the outside pressure and opens when the pressure is outside.

In the apparatus of the present invention, air is evacuated from the inside of the pipe prior to the start of the pouring work. In order to easily perform this air squeeze, a squeeze pump is used as the landfill pressure pump. It is preferable to reversely rotate this so that water flows back from the check valve 21 to the landfill material manufacturing apparatus.

[Brief description of drawings]

1 is a general side view of an example of a device of the present invention.

FIG. 2 is a bottom view showing a mounting mode of a rubber plate of a side discharge port.

FIG. 3 is a side view showing a tension mode of a supplementary winding wire.

[Explanation of symbols]

1: Placing pipe, 2: Suspending wire, 3: High-fluidity landfill material pumping hose, 4: Tip fitting, 5: Conical pipe part, 6: Cylindrical pipe part, 7: Lower end part, 8: Rubber Plate, 9: Iron plate, 10: Rubber plate, 11: Inclinometer, 12: Inner tube, 13: Outer tube, 14:
Seal part, 15: Seal part, 16: Pulley, 17: Pulley,
18: auxiliary winding wire, 19: pinch valve, 20: pressure gauge, 21: check valve.

Claims (3)

[Claims] 1. A lower end of the casting pipe, in which a high-fluidity landfill material pressure-feeding hose is connected to the upper end of a tremie tubular casting pipe suspended by a hanging wire, and a large-diameter tip fitting is attached to the lower end. High-fluidity landfill characterized by extending the high-fluidity landfill material that has flowed down the casting pipe so that it is discharged tangentially near the inner surface of the upper half of the cylindrical pipe portion of the tip fitting. Underwater pouring equipment. 2. A rubber plate with an inclinometer is attached to the side discharge port at the lower end of the tip fitting so as to be vertically rotatable.
Highly fluid landfill material underwater pouring device described. 3. The high-fluidity landfill material submersible pouring device according to claim 1, wherein the pouring pipe has an expandable / contractible inner and outer double pipe structure.