JPH10317386A - Open caisson drilling method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drilling method and device whereby the ground under a starting vertical shaft can be efficiently and rapidly drilled in a circular shape to match the starting vertical shaft, in open-caisson drilling whereby the ground under the starting vertical shaft is drilled using a drilling machine, with the starting vertical shaft filled with clean water. SOLUTION: Open-caisson drilling proceeds by filling a starting vertical shaft with clean water and drilling the ground under the starting vertical shaft using a multiple-shaft drilling machine. In that case, the starting vertical shaft 1 is circular, and a bridge crane 2 which moves across the vertical shaft 1 is installed and includes a traversing truck 3 moving in the perpendicular direction to its moving direction; from the traversing truck 3, the multiple-shaft drilling machine 6 is hung down into the starting vertical shaft 1 and is used to block drill the ground into a rectangular shape. Also, the multiple-shaft drilling machine 6 is turned in a predetermined direction by a turning device 7 to block drill the ground diagonally into a rectangular shape, thereby drilling the ground under the starting vertical shaft 1 into a circular shape matching the circular shape of the starting vertical shaft 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open caisson excavation method for filling a starting shaft with fresh water and excavating a ground under the starting shaft with an excavator, and a drilling apparatus for performing the method.

[0002]

2. Description of the Related Art In the open caisson excavation method, in order to excavate the ground under a circular starting shaft into a circular shape in accordance with the circular shape of the starting shaft, the excavator is usually used for circular excavation.

[0003] However, it is inefficient and time-consuming to excavate a circular ground of a predetermined size by circular excavation.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an open caisson excavation method for efficiently and quickly excavating the ground under a circular starting shaft into a circular shape according to the circular shape of the starting shaft. It is an object of the present invention to provide an open caisson excavation method and a drilling apparatus for performing the method.

[0005]

According to the present invention, in an open caisson excavation method for filling a starting shaft with fresh water and excavating the ground under the starting shaft with a multi-axial excavator, the starting shaft has a circular shape. A bridge-type crane that travels across the shaft is installed, and the bridge-type crane includes a traverse vehicle that traverses in a direction perpendicular to the traveling direction, and a multi-axis excavator is started from the traverse vehicle. Hanging in a shaft, running the bridge-type crane, and traversing the traversing car, moving the multi-shaft excavator to a target excavation position, and then rotating the multi-shaft excavator to a predetermined position by a rotating device. Rotating in the direction, and positioning at a predetermined excavation depth by hoisting and lowering, the multi-axial excavator excavates the ground into a rectangular block,
Excavate the ground under the starting shaft in a circular shape.

In practicing the present invention, the position of the bridge-type crane is detected by the traveling position detector, the position of the traversing truck is detected by the traversing position detector, and the multi-shaft excavator is set at the target excavation position. It is automatically moved, and the direction of the multi-axis excavator is detected by the direction detector, the direction of the multi-axis excavator is automatically set to a predetermined direction, and the depth detector detects the direction of the multi-axis excavator. The depth is detected, and the depth of the multi-shaft excavator is automatically set to a predetermined depth.

Further, the excavated soil is sucked by a suction pump, separated into individual liquids by a screen, solid matter is carried out by a conveyor, and muddy water is circulated into a starting shaft by a circulation pump. The present invention relates to an open caisson excavation method,
When excavating the ground under a circular starting shaft into a circular shape according to the circular shape of the starting shaft, the excavation procedure when constructing an underground continuous wall is carried out by stacking rectangular block excavation, efficient and quick construction Is done.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a starting shaft 1 is constructed in advance on an excavated ground. The starting shaft 1 is circular as shown in FIG. 3 and is filled with fresh water.

In FIG. 2, a bridge-type crane indicated by 2 as a whole which runs on a rail across the starting shaft 1 is installed. The bridge type crane 2 includes a traversing carriage 3 traversing in a direction orthogonal to the traveling direction.

A traveling position detector 4 for detecting the traveling position of the bridge type crane 2 and a traversing position detector 5 for detecting the traversing position of the traversing truck 3 are provided. These detectors 4 and 5 can be wire displacement meters or laser displacement meters.

In FIG. 1 again, a multi-shaft excavator indicated generally by 6 is suspended from the traversing carriage 3 in the starting shaft 1. The multi-shaft excavator 6 is provided with a rotating device 7 so that the angle can be changed.

A depth detector 8 for detecting the depth of the multi-axis excavator 6 and a direction detector 9 for detecting the direction of the multi-axis excavator 6 are provided. An encoder can be used as the depth detector 8, and a magnetic compass can be used as the azimuth detector 9.

In order to carry out the excavated soil excavated by the excavator 6, a discharge pipe 11 is connected to the excavator 6 via a swivel 10, and the discharge pipe 11 is, as shown in FIG. It is supported by an electric chain block 12 provided on the mold crane 2.

In FIG. 1, a suction pump 13 is provided on the discharging pipe 11 to suck muddy water, and then a cyclone screen 14 is provided to separate individual liquids. To be processed soil 16. On the other hand, the muddy water in the notch tank 17 from which the liquid has been separated is circulated into the starting shaft 1 by the circulation pump 18. Further, a submersible pump 19 for supplying makeup water is provided.

Referring again to FIG. 2, the starting shaft 1 is provided with a work floor and a pipe fixing stand 21 by a bracket 20. The bridge type crane 2 has a power supply reel 22.
Is provided.

FIG. 3 shows a display screen of the excavation pattern, in which the data of the current position F of the excavator 6 is displayed as the travel position X = + 2.0.
0m, traversing position Y = -4.00m, depth Z = 0m, direction N = 0 degree.

The excavator 6 is moved to the target position E and excavates. The data of the target position E is calculated as the travel position X = −2.80.
m, traversing position Y = -8.00 m, depth Z = + 2.04
m, direction N = 45 degrees.

Here, the traveling position X is determined by the traveling position detector 4
The traversing position Y is detected by the traversing position detector 5, the depth Z is detected by the depth detector 8, and the direction N is detected by the azimuth detector 9.

For the construction, a manual mode and an automatic mode can be adopted.

In the case of the manual mode (FIG. 4) The excavation target position E is displayed on the excavation pattern display screen (S-1). Next, the current position F is displayed (S-
2). Next, the current machine position is manually corrected with reference to the numerical target data and the display screen of the excavation pattern (S-3). When the excavator enters a predetermined allowable range, excavation is started (S-4).

In the case of the automatic mode (FIG. 5) The excavation target position E is displayed on the excavation pattern display screen (S-1). Next, the current position F is displayed (S-
2). The crane and the trolley automatically travel and traverse toward the target coordinates. Next, the direction of the excavator is automatically positioned at the excavation depth by the rotating device and the excavation depth by the hoisting and lowering (S-3). When the excavator enters a predetermined allowable range, excavation is started (S-4).

[0022]

According to the present invention, when excavating the ground under a circular starting shaft into a circular shape according to the circular shape of the starting shaft,
In the excavation procedure when constructing an underground continuous wall, it is performed by stacking rectangular block excavation, so that it can be performed efficiently and quickly.

[Brief description of the drawings]

FIG. 1 is a diagram showing a flow of an open caisson excavating facility according to an embodiment of the present invention.

FIG. 2 is a front view showing details of a bridge crane.

FIG. 3 is a plan view showing an excavation pattern.

FIG. 4 is a construction flowchart in a manual mode.

FIG. 5 is a construction flowchart in an automatic mode.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Starting shaft 2 ... Bridge crane 3 ... Traversing truck 4 ... Traveling detector 5 ... Traversing detector 6 ... Multi-shaft excavator 7 ... Rotating device 8. ..Depth detector 9 ... Azimuth detector 10 ... Swivel 11 ... Drainage pipe 12 ... Electric chain block 13 ... Suction pump 14 ... Cyclone screen 15 ... Belt conveyor 16 ...・ Treatment soil 17 ・ ・ ・ Notch tank 18 ・ ・ ・ Circulation pump 19 ・ ・ ・ Submersible pump 20 ・ ・ ・ Bracket 21 ・ ・ ・ Work floor and pipe fixing stand 22 ・ ・ ・ Power supply reel

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yozo Kitano 1-35-1 Awaza, Nishi-ku, Osaka-shi, Osaka Prefecture Inside the Kansai Branch of Kashima Corporation (72) Inventor Masashi Mizota Awaza, Nishi-ku, Osaka-shi, Osaka 1-3-15, Kashima Construction Co., Ltd., Kansai Branch (72) Inventor Yasuo Hashimoto 1-3-15, Awaza, Nishi-ku, Osaka-shi, Osaka Kashima Construction Co., Ltd., Kansai Branch (72) Inventor, Shigemitsu Miyagawa 4-143 Azalea Hill, Nabari City, Mie Prefecture

Claims (6)

[Claims] In an open caisson excavation method in which the inside of a start shaft is filled with fresh water and the ground under the start shaft is excavated by a multi-axial excavator, the start shaft is circular and runs over the shaft. A bridge-type crane is provided, the bridge-type crane is provided with a traversing vehicle that traverses in a direction orthogonal to the traveling direction, and a multi-axis excavator is suspended from the traversing vehicle in a starting shaft, , And traverses the traversing carriage to move the multi-shaft excavator to a target excavation position. Then, the multi-shaft excavator is rotated in a predetermined direction by a rotating device, and is lifted and lowered to a predetermined position. An open caisson excavation method characterized in that the excavation is positioned at a predetermined excavation depth, the ground is excavated in a rectangular block by the multi-axial excavator, and the ground below the starting shaft is circularly excavated. 2. The position of the bridge type crane is detected by a traveling position detector, and the position of a traversing truck is detected by a traversing position detector.
The multi-axis excavator is automatically moved to the excavation target position, and the direction of the multi-axis excavator is detected by a direction detector, and the direction of the multi-axis excavator is automatically set to a predetermined direction. 2. The open caisson excavation method according to claim 1, wherein the depth of the multi-axial excavator is detected by a depth detector, and the depth of the multi-axial excavator is automatically set to a predetermined depth. 3. Excavated soil is sucked by a suction pump, separated into individual liquids by a screen, and solids are carried out by a conveyor.
The open caisson excavation method according to claim 2, wherein the muddy water is circulated in the starting shaft by a circulation pump. 4. An open caisson excavator for filling a start shaft with fresh water and excavating the ground with a multi-axial excavator,
A bridge-type crane that runs across the shaft is installed, the bridge-type crane includes a traversing vehicle that traverses in a direction orthogonal to the traveling direction, and a multi-shaft excavator equipped with a rotating device is started from the traversing vehicle. A traveling position detector that hangs in a shaft and detects the position of a bridge-type crane, a traversing position detector that detects the position of a traversing bogie, a direction detector that detects the direction of a multi-axis excavator, and a multi-axis type An open caisson excavator comprising a depth detector for detecting the depth of an excavator. 5. A suction pump for sucking excavated soil,
4. The screen according to claim 3, further comprising: a screen for performing liquid separation, a conveyor for carrying out solid matter, a circulation pump for circulating mud water in the starting shaft, and a makeup water pump for supplying makeup water. An open caisson drilling rig as described. 6. The bridge-type crane is provided with an electric chain block for suspending the discharge pipe.
An open caisson drilling rig according to claim 1.