JP2003020888A - Intrapipe excavation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide intrapipe excavation equipment which increases the amount of excavated earth discharged per unit time so as to realize efficient and inexpensive work of intrapipe excavation. SOLUTION: The intrapipe excavation equipment comprises a water jet 1 which excavates earth 11b in a pipe 11a by using jet water, an underwater sand pump 2 which discharges outside the pipe 11a the muddy water containing the excavated earth in the pipe 11a excavated by the water jet 1, and a piping unit 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-pipe excavating device used for excavating and removing earth and sand in a steel pipe or the like that is driven into the ground as part of a foundation or the like in civil engineering work.

[0002]

2. Description of the Related Art As a conventional drilling device of this type,
Although not shown, it is composed of a water jet for excavating the earth and sand in the steel pipe using jet water, and an air lift for discharging the mud water in the steel pipe containing the excavated soil excavated by the water jet to the outside of the steel pipe. There is something.

[0003]

However, in such a pipe excavating device, since excavated soil excavated by a water jet is discharged by an air lift, there are the following problems.

That is, according to such a pipe excavating device,
The excavated soil is included in the muddy water from the bottom of the pipe by an air lift, rises in the steel pipe, and is directly discharged outside the steel pipe together with the muddy water overflowing from the top of the steel pipe.

Therefore, in such an in-pipe excavating device, excavated soil having a small specific gravity is preferentially discharged to the outside of the steel pipe, and one having a large specific gravity cannot rise to the top of the steel pipe and remains in the steel pipe. In addition to the limited amount of excavated soil that can be discharged, the remaining heavy excavated soil hinders excavation by the water jet.

In addition, a large amount of muddy water overflowing outside the steel pipe and a treatment facility are required, and the amount of excavated soil discharged per unit time is inevitably reduced.

As a result, it is actually considerably difficult to realize an efficient and inexpensive pipe excavation work.

[0008] Therefore, an object of the present invention is to provide an in-pipe excavating device in which the discharge amount of excavated soil per unit time increases so that an efficient and inexpensive in-pipe excavating work can be realized.

[0009]

Means for Solving the Problems That is, an in-pipe excavating device according to the present invention uses a water jet for excavating the earth and sand in the pipe by using jet water, and a mud water in the pipe containing excavated soil excavated by the water jet. It is characterized by including a submersible sand pump that discharges to the outside.

According to the in-pipe excavating device of the present invention, since the mud water in the pipe containing the excavated soil excavated by the water jet is discharged to the outside of the pipe by the submersible sand pump, a part of the excavated soil remains in the pipe. It does not hinder the excavation by the water jet, and in addition, the treatment of a large amount of muddy water overflowing outside the pipe becomes unnecessary.

Therefore, the discharge amount of the excavated soil per unit time is increased as compared with the conventional technique in which the excavated soil is discharged to the outside of the pipe by the air lift, and the efficient and inexpensive excavation work in the pipe is performed. It can be realized.

In such a technical means, the water jet and the submersible sand pump discharge the muddy water in the pipe containing the excavated soil excavated by the water jet to the outside of the pipe, thereby excavating the excavated soil per unit time. The presence or absence of each of the devices as long as they fulfill the functions necessary and sufficient for achieving the object of the present invention of increasing the emission amount of It doesn't matter.

However, due to the use of heavy equipment such as cranes,
From the viewpoint of ensuring an efficient and inexpensive in-pipe excavation work, the water jet and the submersible sand pump are suspended by a heavy machine as an integrated unit, and can be freely moved up and down in the pipe. It is preferable.

The water jet as a part of such an integrated unit is supplied with at least a water supply pipe such as a steel pipe or a flexible pipe for supplying jet water used for excavating earth and sand in the pipe. And a nozzle for ejecting water.

Further, the submersible sand pump as a part of such an integrated unit includes a pump device itself for pumping mud in the pipe containing at least excavated soil, and a pump device such as a steel pipe or a flexible pipe. A drainage pipe for guiding the mud water sucked by the outside of the pipe is included.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a side view showing a schematic structure of an in-pipe excavating device according to an embodiment of the present invention, and FIG. 2 is a view showing a detailed structure of a lower end side of the in-pipe excavating device (FIG. 2 (a) is a side view). Fig. 2 (b) is a view from the direction of arrow A in Fig. 2 (a), and Fig. 3 is a side view showing the detailed structure of the upper end side of the in-pipe excavating device.

The following description is for in-pipe excavation when placing solid concrete in the pipe of a steel pipe sheet pile in a steel pipe sheet pile Izutsu foundation, but other than this, for example, when pulling out a temporary steel pipe sheet pile. It is also valid for in-pipe drilling.

In the present embodiment, the pipe excavating device is
As shown in FIG. 1, it comprises a water jet 1, a submersible sand pump 2, and a piping unit 3.
Hereinafter, each component will be described in detail.

(1) Water Jet 1 The water jet 1 plays a role of excavating the earth and sand 11b in the pipe 11a by using jet water.

Specifically, as shown in FIG. 1, the water jet 1 includes a water supply submersible pump device 1a installed in a well 11, a water supply hose 1b, and a water supply pipe 1c.
And a nozzle unit 1d.

Here, as shown in FIG. 3, the water supply pipe 1c is connected by a flange joint 21 so as to contribute to the convenience of disassembling and assembling the in-pipe excavating device.

As shown in FIG. 2, the nozzle unit 1d is fixed to the outer peripheral portion near the water intake port of the submersible sand pump device 2a having a substantially columnar shape, and the water supply pipe 1
Ring-shaped water supply pipe 31 communicating with c and ring-shaped water supply pipe 3
1 and a plurality of jet nozzles 32 attached to one.

Here, as shown in the same figure, the jet nozzle 32 has a ring-shaped water supply pipe 31 at an appropriate interval and jetting direction so as to realize effective excavation using jet water.
Is attached to. Specifically, half of the jet nozzles 32 are mounted vertically downward, while the other half are mounted outward downward.

(2) Submersible sand pump 2 The submersible sand pump 2 pumps up the muddy water in the pipe 11a containing the excavated soil excavated by the water jet 1 to the pipe 1.
It plays a role of discharging to the outside of 1a.

This submersible sand pump 2 is specifically
As shown in FIG. 1, earth and sand 1 in the pipe 11a to be excavated
It is composed of a submersible sand pump device 2a which should be installed facing 1b, a drain pipe 2b, and a drain hose 2c. A float 2d is attached to the lower end of the drain hose 2c for the purpose of visually confirming the discharged soil and reducing the force acting on the drain hose 2c.

As shown in FIGS. 1 and 3, the drainage pipe 2b is connected by a flange joint 41 so as to contribute to the convenience of disassembling and assembling the in-pipe excavating device.

(3) Piping Unit 3 As shown in FIG. 3, the piping unit 3 is a water supply pipe of the water jet 1 so that the water jet 1 and the submersible sand pump 2 are integrally formed. Drain pipe 2 of 1c and submersible sand pump 2
b, and a connecting fitting 3a which plays a role of connecting the water supply pipe 1c and the drainage pipe 2b.

As shown in FIG. 1, the connecting fitting 3a is provided so as to extend over a plurality of steps between the water supply pipe 1c and the drain pipe 2b.
As shown in FIG. 3, a hanging piece 3b for hanging the unit integrated by the crane 51 is provided.

That is, as shown in FIG. 1, an integrated unit composed of such a water jet 1, a submersible sand pump 2 and a piping unit 3 is suspended by a crane 51, which is a heavy machine, so that a pipe 11a is formed.
It is possible to move up and down freely inside.

In the in-pipe excavation using such an in-pipe excavation device, as shown in the figure, the unit integrated by the crane 51 is kept in the pipe 11a while the water jet 1 and the submersible sand pump 2 are stopped. And land the bottom end of the device on the surface of the earth and sand 11b, which is the bottom of the pipe 11a at this point, and then the water jet 1
By operating both the submersible sand pump 2 and the submersible sand pump 2, muddy water in the pipe 11 a containing the excavated soil excavated by the water jet 1 is submerged by the submersible sand pump 2 in the pipe 11 a.
It is to discharge it to the outside.

That is, according to the in-pipe excavation using such an in-pipe excavation device, immediately after excavation by the water jet 1, all of the excavated soil can be pumped up by being included in the muddy water in the pipe 11a and discharged out of the pipe 11a. , A part of excavated soil does not remain in the pipe 11a, and the water jet 1
Not only does this not hinder the excavation by the pipe, but also the treatment of a large amount of muddy water that overflows outside the pipe 11a becomes unnecessary.

Therefore, according to the in-pipe excavating device of this embodiment, the discharge amount of excavated soil per unit time is increased as compared with the conventional technique in which the excavated soil is discharged outside the pipe by the air lift. Therefore, it is possible to realize efficient and inexpensive pipe excavation work.

[0034]

According to the present invention, it is possible to provide an in-pipe excavating device in which the amount of excavated soil discharged per unit time is increased so that an efficient and inexpensive in-pipe excavation work can be realized.

[Brief description of drawings]

FIG. 1 is a side view showing a schematic configuration of a pipe excavating device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a detailed configuration on a lower end side of an in-pipe excavating device according to an embodiment of the present invention (FIG. 2 (a) is a side view, FIG.
2B is a view as seen from the direction of arrow A in FIG.

FIG. 3 is a side view showing a detailed configuration on the upper end side of the pipe excavating device according to the embodiment of the present invention.

[Explanation of symbols]

1 ... Water jet 1a ... Submersible pump device for water supply 1b ... water supply hose 1c ... water supply pipe 1d ... Nozzle unit 2 ... Submersible sand pump 2a ... Submersible sand pump device 2b ... Drainage pipe 2c ... drainage hose 2d ... float 3 ... Piping unit 3a ... Connection fitting 3b ... Hanging piece 11 ... Izutsu 11a ... tube 11b ... earth and sand 21 ... Flange joint 31 ... Ring-shaped water supply pipe 32 ... Jet nozzle 41 ... Flange joint 51 ... Crane

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toho Matsuo             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. F-term (reference) 2D029 DB01 DB05                 2D050 AA08 DA00 DB00

Claims (2)

[Claims] 1. A water jet for excavating earth and sand in a pipe by using jet water, and an underwater sand pump for discharging muddy water in a pipe containing excavated soil excavated by the water jet to the outside of the pipe. In-pipe drilling equipment. 2. The in-pipe excavating device according to claim 1, wherein the water jet and the submersible sand pump are suspended by a heavy machine as an integrated unit and can be freely moved up and down in the pipe.