JP2013227759A - Continuous excavation earth removal device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable work from excavation to earth removal to be continuously performed without using a dedicated crane by eliminating the need of pulling out earth from a steel pipe and moving it to an earth disposal yard for each time of earth removal, and to achieve improvement in work efficiency and reduction in construction period and construction cost.SOLUTION: A continuous excavation earth removal device comprises: an annular base part 2 mounted on the head of a pipe body P buried in the ground; a pedestal 3 rotatably mounted on the base part; a cylindrical body 4 erected on the pedestal and having a substantially same diameter as that of the pipe body P; a lifting mechanism 6 firmly-mounted to the cylindrical body; and an excavation device 7 suspended from the lifting mechanism and freely movable in the insides of the pipe body P and the cylindrical body 4, an opening 41 for earth removal being formed in the cylindrical body 4. The base part 2 is provided with a gripping part 21 for gripping the pipe body P, and the base part 2 and the pedestal 3 are provided with a rotary drive mechanism 5 which rotates the rotating and cutting pipe body P and cylindrical body 4 relatively to each other. The cylindrical body 4 is rotated synchronously with rotation of the pipe body P at the equal speed and in a direction opposite to that of the pipe body P.

Description

  The present invention relates to a continuous excavation and soil removal apparatus and method used when embedding pipe bodies such as steel pipe piles and casing pipes.

When a pipe body such as a steel pipe or PC pile is embedded in a solid ground or gravel ground, a method of excavating the inside of the pipe body with a screw auger having the same scale as the pipe body is used.
In addition, a method of press-fitting while rotating with a steel pipe or a casing pipe with a cutting blade at the tip and excavating the inside with a hammer grab is also used.
However, in the screw auger method, the excavation length becomes long and the weight of the auger increases, so that labor is required for handling.
Further, the method using the hammer grab has a problem that the work efficiency is not good because the amount of soil discharged per time is small.

In contrast, there is a drilling and earthing device disclosed in Patent Document 1.
This excavation and earthing device suspends an excavation and earthing device in which a short casing auger and a fixing means for pressing and fixing the inner surface of the casing pipe to the casing auger head are arranged in a casing pipe to be rotated and cut. By fixing the earth removal device at the tip, the auger is rotated by the rotational force of the casing pipe to excavate the inside of the casing pipe. When the excavation soil fills the casing auger, the pressure on the casing pipe is released and the excavation discharge is performed. After pulling out the earth device and discharging it, it is suspended in the casing pipe again.
According to the excavation and earthing device disclosed in Patent Document 1, a special device for driving an auger is not required even when drilling at a deep depth, and a large amount of earth can be discharged at a time compared to a hammer grab.

Further, Patent Document 2 proposes an excavation and earthing device in which an auger propulsion mechanism and a rotation mechanism are separately added.
In addition to the effect obtained by the excavation and earthing device of Patent Document 1, the excavation and earthing device of Patent Document 2 facilitates the earthing from the auger casing, thereby improving work efficiency.

JP-A-2-157387 JP 2007-327333 A

However, each of the excavation and earthing devices of Patent Documents 1 and 2 requires a dedicated crane to suspend the excavation and earthing device. For other work, for example, preparation work such as moving a steel pipe to be buried next, It is uneconomical that a separate crane needs to be prepared.
Also, every time the soil is removed, the excavation and soil removal device is lifted from the casing pipe, transferred to the dumping site, and after the soil is removed, the work is again lifted and suspended in the casing pipe. It is never effective in terms of.

  The problem of the present invention is that it can be continuously performed from excavation to soil removal without using a dedicated crane and without the trouble of pulling out from the steel pipe every time soil is removed and moving to the dumping site. It is possible to improve, shorten the construction period and reduce the construction cost.

In order to solve the above problems, the invention described in claim 1
An annular base portion mounted on the head of a tubular body embedded in the ground;
A pedestal rotatably mounted on the base part;
A tubular body standing on the pedestal and having substantially the same diameter as the tubular body;
An elevating mechanism fixed to the cylindrical body;
A drilling device that is suspended by the lifting mechanism and is movable within the tubular body and the tubular body,
The present invention is characterized by a continuous excavation and soil removal device in which an opening for soil removal is formed in the cylindrical body.

The invention described in claim 2
The continuous excavation and earth discharging device according to claim 1,
The base portion is provided with a grip portion for gripping the tubular body.

The invention according to claim 3
The continuous excavation and earth discharging device according to claim 2,
The base portion and the pedestal are provided with a rotation drive mechanism that relatively rotates a tubular body and a tubular body to be rotated and cut.

The invention according to claim 4
The continuous excavation and earth discharging device according to claim 3,
In synchronism with the rotation of the tubular body by the rotational drive mechanism, the cylindrical body is rotated at a constant speed and in the opposite direction to the tubular body.

The invention described in claim 5
The continuous excavation and earth discharging device according to claim 1,
The base unit, pedestal, cylindrical body, lifting mechanism, excavator, a fixing mechanism for fixing the excavator to the inner surface of the tube, and a propulsion mechanism for propelling the excavator are configured as a capsule unit. It is characterized by that.

The invention described in claim 6
Using the continuous excavation and earth discharging device according to claim 5,
Grip the tubular body to the base portion by the gripping portion,
Lowering the excavator by the lifting mechanism;
Fixing the excavator to the inner surface of the tube by the fixing mechanism;
While propelling the excavator by the propulsion mechanism to drill the ground,
Release the fixing mechanism and raise the excavator by the lifting device,
Fixing the excavator to the inner surface of the cylindrical body by the fixing mechanism;
The excavating soil accumulated in the excavator is characterized by a continuous excavating and discharging method in which the excavated soil is discharged from the opening.

  According to the present invention, it is possible to improve the work efficiency without using a dedicated crane and removing the excavation device from the pipe body such as a steel pipe and moving it to the dump site every time the soil is removed. The construction period can be shortened and the construction cost can be reduced.

It is a longitudinal cross-sectional view which shows the structure of one Embodiment of the continuous excavation earth removal apparatus to which this invention is applied.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment)
FIG. 1 shows the configuration of an embodiment of a continuous excavation and earthing device to which the present invention is applied. P is a pipe, 1 is a capsule, 2 is a base, 3 is a base, 4 is a cylindrical body, Is a rotary drive mechanism, 6 is an elevating mechanism, 7 is a screw auger (excavator), 8 is a fixing mechanism, and 9 is a propulsion mechanism.

As shown in the figure, the capsule portion 1 is placed on a pipe body P that rotates and cuts the ground.
The capsule unit 1 has an annular base portion 2 mounted on the head of the tube P, and an annular pedestal 3 is rotatably mounted on the base portion 2, and the tube body is mounted on the pedestal 3. A cylindrical body 4 having substantially the same diameter as P is erected.

And between the base part 2 and the base 3, the rotational drive mechanism 5 which rotates the tubular body P and the cylindrical body 4 to be rotated and cut is provided, and the elevating mechanism 6 is fixed inside the cylindrical body 4, A screw auger 7 is suspended from the lifting mechanism 6 as an excavator.
The screw auger 7 is movable within the pipe body P and the cylindrical body 4 by an elevating mechanism 6.

  Furthermore, a fixing mechanism 8 that presses and fixes the screw auger 7 to the inner surface of the tube P and a propulsion mechanism 9 that propels the screw auger 7 are mounted on the screw auger 7.

The base portion 2 is provided with a gripping mechanism as shown in the drawing, that is, a plurality of gripping portions 21 that grip the outer surface of the tube body P, and a horizontal cylinder unit 22 that is a drive portion that moves the gripping portion 21 back and forth. It has been.
Instead of the gripping mechanism, a shoe that contacts the outer surface of the tube P may be provided.

An annular rack 51 is provided on the outer periphery of the base portion 2, and a motor 52 that is a drive portion is provided on the base 3.
A pinion 53 driven by a motor 52 is provided below the pedestal 3.
The rotation drive mechanism 5 is configured by the pinion 53 meshing with the rack 51 described above.

  The tubular body 4 is provided with a vertically long opening 41 for discharging the soil corresponding to the length of the screw auger 7.

  As shown in the figure, the elevating mechanism 6 is constituted by a winch, for example, and is provided with a load meter 61.

  The screw auger 7 is provided with a bit 71 at the lower end, and a motor 73 as a drive unit is mounted on the head 72.

  The fixing mechanism 8 mounted on the head 72 of the screw auger 7 fixes the screw auger 7 by pressing the plurality of pressing portions 81 against the inner surface of the pipe body P by advancing and retreating operations of a plurality of horizontal cylinder units. .

  The propulsion mechanism 9 mounted on the head 72 of the screw auger 7 is a plurality of sets of vertically installed cylinder units, a fixing plate 74 that is mounted with the fixing mechanism 8 and is suspended and connected to the lifting mechanism 6, and the screw auger 7. Between the head 72 and the head.

The continuous excavation and earthing device having the above configuration is assembled by placing the capsule part 1 on the pipe body P, extending the cylinder unit 22 of the base part 2, and gripping the outer surface of the pipe body P by the grip part 21.
When rotating the tubular body P by a rotary excavator (not shown), the tubular body 4 is rotated at a constant speed in the direction opposite to the tubular body P by the rotation drive mechanism 5 in synchronization with the rotation of the tubular body P.

At this time, the screw auger 7 is in the raised position by the elevating mechanism 6, and the cylinder units of the fixing mechanism 8 and the propulsion mechanism 9 are both contracted.
Then, excavation and soil removal inside the pipe P are continuously performed when the pipe P is stationary.

Next, the procedure for continuous excavation and soil removal will be described.
First, in the excavation inside the tube P, the screw auger 7 is lowered by the lifting mechanism 6.
Then, the landing is determined by the load meter 61, the cylinder unit of the fixing mechanism 8 of the screw auger 7 is extended, and the screw auger 7 is fixed to the inner surface of the tubular body P by the pressing portion 81.
Next, drilling is started by propulsion by the extension of the cylinder unit of the propulsion mechanism 9 while the screw auger 7 is rotated by the motor 73.

When the predetermined propulsion length is reached, the fixing mechanism 8 is released and the screw auger 7 is raised to the capsule portion 1.
Next, the screw auger 7 is rotated by driving the motor 73 while being fixed to the inner surface of the cylindrical body 4 of the capsule portion 1 by the fixing mechanism 8.
At this time, the earth and sand in the screw auger 7 is discharged out of the capsule part 1 from the opening 41 by centrifugal force.

  By repeating the above, since excavation and earth removal can be performed continuously, efficiency is improved, thus contributing to the shortening of the construction period and the reduction of the construction cost.

As described above, according to the continuous excavation and earthing device of the embodiment, the annular base portion 2 mounted on the head of the pipe body P, the pedestal 3 rotatably mounted on the base portion 2, and standing on the pedestal 3 The screw auger 7 has a capsule portion 1 made of a cylindrical body 4 having the same diameter as the tubular body P, and is movable inside the tubular body P and the capsule portion 1 by an elevating mechanism 6 fixed to the tubular body 4. Because it hangs down, a dedicated crane for excavation and earthing equipment is not required.
Further, it is not necessary to interrupt the rotational cutting of the pipe body P except when excavating the screw auger.

  And, in order to rotate the capsule part 1 in the direction opposite to the pipe P at a constant speed in synchronization with the rotation of the pipe P, the capsule part 1 always remains stationary regardless of the rotation of the pipe P. The piping for driving the screw auger 7, the power system, and the instrumentation system wiring do not get tangled.

  Furthermore, by arranging a chute in the opening 41 of the cylindrical body 4 of the capsule portion 1, the excavated soil does not scatter around and the drawing of the screw auger 7 from the tube P is unnecessary, and the work efficiency is greatly improved. Can be improved.

(Modification)
In the above embodiment, the rotational drive mechanism is used. However, the present invention is not limited to this, and can be applied to a steel pipe sheet pile that is embedded without being rotationally cut.
In the embodiment, the elevating mechanism is provided inside the cylindrical body. However, the elevating mechanism may be fixed outside the cylindrical body and suspended inside using a pulley.
Furthermore, a scraping plate may be disposed in the opening.
In addition, the specific configuration, shape, and the like of each part are arbitrary, and it is needless to say that specific detailed structures and the like can be appropriately changed.

P Tubular body 1 Capsule part 2 Base part 21 Grasping part 22 Drive part 3 Base 4 Tubular body 41 Opening part 5 Rotation drive mechanism 51 Rack 52 Drive part 53 Pinion 6 Lifting mechanism 61 Load meter 7 Excavator 71 Bit 72 Head 73 Driving unit 74 Fixing plate 8 Fixing mechanism 81 Pressing unit 9 Propulsion mechanism

Claims (6)

An annular base portion mounted on the head of a tubular body embedded in the ground;
A pedestal rotatably mounted on the base part;
A tubular body standing on the pedestal and having substantially the same diameter as the tubular body;
An elevating mechanism fixed to the cylindrical body;
A drilling device that is suspended by the lifting mechanism and is movable within the tubular body and the tubular body,
A continuous excavation and soil removal device, wherein an opening for soil removal is formed in the cylindrical body.   The continuous excavation and earth discharging device according to claim 1, wherein the base portion includes a gripping portion that grips the tubular body.   The continuous excavation and earth discharging device according to claim 2, wherein the base part and the pedestal are provided with a rotation drive mechanism that relatively rotates the tubular body and the tubular body to be rotated and cut.   4. The continuous excavation and earth discharging device according to claim 3, wherein the cylindrical body is rotated at a constant speed and in a direction opposite to the pipe body in synchronization with the rotation of the pipe body by the rotation driving mechanism. .   The base unit, pedestal, cylindrical body, lifting mechanism, excavator, a fixing mechanism for fixing the excavator to the inner surface of the tube, and a propulsion mechanism for propelling the excavator are configured as a capsule unit. The continuous excavation and earth discharging device according to claim 1. Using the continuous excavation and earth discharging device according to claim 5,
Grip the tubular body to the base portion by the gripping portion,
Lowering the excavator by the lifting mechanism;
Fixing the excavator to the inner surface of the tube by the fixing mechanism;
While propelling the excavator by the propulsion mechanism to drill the ground,
Release the fixing mechanism and raise the excavator by the lifting device,
Fixing the excavator to the inner surface of the cylindrical body by the fixing mechanism;
A continuous excavating and discharging method characterized in that the excavated soil accumulated in the excavating device is discharged from the opening.

Images