JPH0681577A - Device for drilling deep pile shaft and drilling method using thereof - Google Patents

Abstract

(57) [Summary] [Purpose] A guide pipe lifting device can be miniaturized and can be moved without the need for disassembling, assembling, and re-installing multiple vertical shafts on the same site. [Structure] A guide pipe holding device a and a guide pipe elevating device b are installed on machine frames 1 and 6 installed at a vertical shaft construction position, and the guide pipe elevating device b suspends the guide pipe 3 vertically. A gravity bucket excavator 14 that moves up and down inside to vertically excavate the bottom center portion 33 of the shafts 5a to 5f is provided, and a full swing excavation that excavates the inner wall surface of the shafts 5a to 5f on the outer periphery of the guide pipe 3. An inner wall surface of the vertical shafts 5a to 5f which is equipped with a device 16 so as to be rotatable, vertically moves inside the guide pipe 3 in the same manner as the gravity type bucket excavator 14, and protrudes downward from the tip of the guide pipe 3. Further, a spray manipulator 25 for spraying mortar or concrete to retain the soil is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deep pit shaft construction apparatus for sequentially excavating, unloading earth (exporting to the outside of the pit) and retaining soil, and a construction method using the same.

[0002]

2. Description of the Related Art Conventionally, as a vertical shaft construction device, for example, there is one described in JP-A-4-153495. This shaft construction device supports a casing pipe having a cutting edge for excavation at a casing pipe driving device provided on the ground, and surrounds the casing pipe at an upper position separated by a predetermined distance from the casing pipe tip. An excavator for excavating the ground is provided and a spraying device for lining mortar, concrete or the like on the excavated wall at a position higher than the excavator.

In the shaft construction device thus constructed, the casing pipe drive is operated to rotate the casing pipe in one direction, and the tip of the shaft excavates the ground in advance, and each time a certain depth is dug, With the casing pipe fixed with the tip penetrating into the soil and the base end supported by the casing pipe drive, the excavator is operated to excavate the ground around the casing pipe, and the excavated soil generated is casing. The work is to discharge it through the pipe to the outside of the mine, and the excavation surface around the casing pipe is earthed by spraying mortar or concrete. This procedure is repeated to construct a shaft.

[0004]

In order to install the above-described conventional shaft construction device at the excavation position, first, the casing pipe driving device is used to press the casing pipe into the soil, and in that state, the casing pipe driving device is once removed. However, because the initial excavation around it was carried out to a depth where the excavator and the spraying device could be attached, the excavator and the spraying device were attached, and the casing pipe drive device was attached again to the casing pipe protruding above the ground. In addition to the time-consuming installation, the initial excavation had to be carried out relatively deeply in order to attach the excavator and the spraying device to the casing pipe.

Further, since the casing pipe drive device is used for rotating and raising and lowering the casing pipe, its structure becomes very large.

Further, even when a plurality of vertical shafts are constructed on the same site, it is necessary to repeatedly disassemble and assemble the entire apparatus and install the above-mentioned vertical shafts.

Since the spraying device is fixed to the upper part of the excavator, there is a considerable time difference between the end of excavation and the spraying of the part, and there is a problem in stability of the excavated surface during that time.

An object of the present invention is to reduce the size of the guide pipe elevating device, and when constructing a plurality of vertical shafts in the same site, it is not necessary to disassemble, assemble and re-install the device, and the device can be moved as it is. An object is to provide a deep foundation shaft construction device that can be used and a construction method using the same.

[0009]

In the construction apparatus according to the present invention, a guide pipe holding device a and a guide pipe lifting device b are installed on machine frames 1 and 6 installed at a vertical shaft construction position, and the guide pipe lifting device is installed. Gravity bucket excavator 1 that vertically suspends the guide pipe 3 by b and moves up and down inside the guide pipe 3 to excavate the bottom center portion 33 of the vertical shaft 5 in advance.
4 is provided, and a full swing excavator 16 for excavating the inner wall surface of the vertical shaft 5 is provided on the outer circumference of the guide pipe 3 so as to be rotatable, and after completion of excavation, the full swing excavator is raised to move the gravity bucket. A spray manipulator that moves up and down inside the guide pipe 3 similarly to the excavator 14 and sprays mortar or concrete on the inner wall surface of the vertical shaft 5 that is projected downward from the tip of the guide pipe 3 to quickly earth-retain it. 25 is provided.

Wheels 7 and 7 rolling on rails 4 and 4 laid around a plurality of vertical shaft construction positions are provided with lift devices 8 and 8.
And the lift devices 8 and 8 are installed on the wheels 7 and 7.
The machine frames 1 and 6 are directly installed on the ground surface at the vertical shaft construction position by lifting the wheel, and the machine frames 1 and 6 are moved from the ground surface by lowering the wheels 7 and 7 on the rails 4 and 4. It is designed to float and move.

The guide pipe elevating device b is a guide pipe elevating jack 10 for elevating and lowering a holding member 9 for holding the guide pipe 3, and the guide pipe elevating jack 1.
0 is horizontally slid, and the machine frames 1 and 6 radially guide a plurality of guide cylinders 13 for centering the guide pipe 3 suspended by the guide pipe lifting device b. It is constructed by erection.

In the construction method according to the present invention, the tip of the guide pipe 3 vertically suspended by the guide pipe elevating device b supported on the machine frame installed on the ground is grounded and fixed to the excavated bottom surface of the vertical shaft 5, and the guide pipe is fixed. 3. The gravity type bucket excavator 14 which moves up and down in the inside 3 to excavate the bottom center part 33 of the vertical shaft 5 in advance and to discharge the soil.
The inner peripheral portion of the shaft 5 is excavated by the all-swing excavator 16 that swivels around the outer periphery of the shaft, and the excavated soil is collected in the bottom center portion 33 that has already been excavated, and the excavated soil is discharged by the gravity bucket excavator 14. Soiling is carried out by vertically moving in the guide pipe 3 and spraying mortar or concrete on the inner wall surface of the vertical shaft 5 which is protruded downward from the tip of the guide pipe 3 to carry out earth retaining.

The machine frames 1 and 6 supporting the guide pipe lifting device b are moved to the next vertical shaft construction position along the rails 4 and 4 laid around a plurality of vertical shaft construction positions, and the vertical shaft construction is carried out at the positions. To do.

[0014]

[Operation] A tip of a guide pipe vertically suspended by a guide pipe lifting device supported on a machine frame installed on the ground is grounded and fixed to an excavation bottom surface of a vertical shaft, and a gravity bucket excavator is vertically moved in the guide pipe. This allows for pre-excavation and soil removal in the center of the bottom of the shaft.

By providing a fully swivel excavator which can swivel around the outer circumference of the guide pipe, it is possible to excavate the peripheral portion of the inner surface of the shaft, and collect the excavated soil in the center portion of the already excavated bottom surface. The gravity bucket excavator can be used for soil removal.

By pulling up the guide pipe and projecting the spraying manipulator downward from the tip of the guide pipe, mortar or concrete can be sprayed on the inner wall surface of the excavated vertical shaft to quickly carry out earth retaining.

Wheels rolling on rails laid around a plurality of vertical shaft construction positions are hung vertically via a lift device, and the wheels are lifted by the lift device, whereby the machine frame is grounded at the vertical shaft construction position. The machine frame can be moved by placing it directly on the surface, or by lowering the wheels on the rails and by levitating the machine frame.

By radially mounting a plurality of guide cylinders on the machine frame, it is possible to center the guide pipe suspended by the guide pipe elevating device.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. In the figure, a is a guide pipe holding device which is installed at a vertical shaft construction position where the surface layer portion is excavated by a power shovel (not shown) and the root portion is reinforced and solidified.
In this guide pipe holding device a, a pair of left and right guide pipe holding rods 2 are installed on the lower machine frame 1 so as to be opened and closed by guide pipe holding jacks 2a and 2a. Reference numerals 2 and 2 hold the guide pipe 3 from the horizontal direction of the X axis.

When a plurality of vertical shafts 5a to 5f are to be excavated in the same site, for example, as shown in FIG. 9, 4 and 4 are rails laid on both sides of each vertical shaft 5a to 5f. Reference numeral 6 denotes an upper machine frame which is superposed on the machine frame 1 of the guide pipe holding device a, and wheels 7 and 7 which can be turned are provided on the machine frame 6 through lift devices 8 and 8. The wheels 7 and 7 are usually lifted above the rails 4 and 4 by the lift devices 8 and 8 and the guide pipe holding device a
Is installed directly on the ground surface at the vertical shaft installation position. However, by operating the lift devices 8 and 8, the wheels 7 and 7 can be lowered onto the rails 4 and 4, and the machine casing 1 can be floated above the ground surface.

Reference numeral b is a guide pipe lifting device installed on the machine frame 6. The guide pipe lifting device b is provided with guide pipe lifting jacks 10 for lifting the gripping members 9, 9 holding the guide pipe 3 in the Z-axis direction. The stored guide pipe lifting masts 11, 11 and the guide pipe lifting masts 1
It is composed of slide jacks 12 and 12 that horizontally slide 1 and 11 in the Y-axis direction. The guide pipe 3 is suspended vertically from the guide pipe lifting device b,
A cutout portion 3a for collecting excavated soil is provided at the tip thereof.

13 ... is used to align the center of the guide pipe 3 with the center of the intersection of the X-axis sliding direction of the guide pipe holding device a and the Y-axis sliding direction of the guide pipe lifting device b. The guide cylinder 13 has a base end attached to the machine frame 6 to support the guide pipe 3 from the radial direction.

As shown in FIG. 2, reference numeral 14 denotes a gravity type bucket excavator that is used to guide the inside of the guide pipe 3 to excavate the ground and to carry the excavated soil out of the mine. Winds up and lowers the crane device 15 to perform pre-excavation in the guide pipe 3 of the vertical shaft 5a.

Reference numeral 16 denotes a rotary excavator 17 and a breaker 18 used for excavating the inner peripheral portion of the vertical shaft 5a, collecting the soil and shaping the inner wall surface thereof, respectively, by rocking cylinders 17a, 18a and a telescopic arm. It is a full swing excavator which is attached by 17b and 18b and is installed so as to swing freely around the guide pipe 3. The full-swing excavator 16 can be equipped with a shovel excavator, a rock drill, or the like as appropriate in order to cope with a wide variety of geology.

Reference numeral 19 denotes a rotary drive device for rotating the full-swing excavator 16 around the guide pipe 3. Two
Reference numerals 0 and 20 denote a pair of gripper devices provided to vertically support the guide pipe 3 in the vertical shafts 5a to 5f. The gripper devices 20 and 20 are gripper plates 20a and 20a.
And gripper telescopic cylinders 20b, 20b (FIG. 6).

Reference numerals 21 and 21 are TV cameras for monitoring underground work such as excavation and earth retaining around the inner surfaces of the vertical shafts 5a to 5f. The TV cameras 21 and 21 are all-swivel type excavator 16
Installed on. Reference numeral 22 is a TV monitor showing the work site photographed by the TV cameras 21 and 21, and reference numeral 23 is an elevating equipment installed in the machine frame 6 to guide and elevate the mangage 24 into the guide pipe 3 (FIG. 5).

Reference numeral 25 is a spraying manipulator used for earth retaining of the inner walls of the vertical shafts 5a to 5f. The spraying manipulator 25 is a spraying material hose 26 and a spraying rotating device 2.
7 and a spray rocking device 28 for rocking the spray nozzle. 29 is a spraying gripper for fixing the spraying manipulator 25 to the guide pipe 3,
The spraying gripper 29 has a structure in which the gripper plate is moved forward and backward by the gripper telescopic cylinder (FIG. 4).

Reference numeral 30 is a hydraulic unit which is a drive source of each hydraulic device such as the guide pipe holding jack 2a, the guide pipe lifting jack 10 and the slide jack 12, and 31 is a ventilation device.

Reference numeral 32 denotes a slewing bearing device for suspending the full slewing excavator 16 on the guide pipe 3, and the slewing bearing device 32 includes a bearing slewing outer ring 32a integrally provided on the side of the full slewing excavator 16 and a guide. A bearing steel ball 32c is interposed between a bearing swirling inner ring 32b integrally provided on the pipe 3 side, and a pinion 19a of a rotary drive device 19 is meshed with the bearing swirling outer ring 32a.

The vertical shaft construction device having the above-mentioned structure is installed at the vertical shaft construction position as follows, and excavates the vertical shaft. That is, the machine frame 1 is installed at the first vertical shaft construction position, the guide pipe holding device a is installed on the machine frame 1, the machine frame 6 is placed, and the guide pipe lifting device b is installed on the machine frame 6. To do.

On the other hand, the full swing excavator 16, the gripper device 20, and the TV cameras 21 and 21 are installed at predetermined positions on the outer circumference of the guide pipe 3.

Then, the guide pipe 3 is vertically suspended from the guide pipe elevating device b while being guided by the guide cylinders 13 ... And the position of the tip end side of the guide pipe 3 is adjusted by the gripper device 20 with respect to the center of the vertical shaft 5a. Meanwhile, the tip is grounded to the bottom of the excavation.

As a result, the upper end and the lower end of the guide pipe 3 are fixed between the guide pipe lifting device b and the excavation bottom surface. Therefore, first, the center leading excavation is performed as follows. That is, the guide pipe 3 is used as a guide, and the inside of the guide pipe 3 is vertically moved at a high speed and in a stable state by vertically moving the gravity bucket excavator 14 to excavate the bottom surface central portion 33 of the vertical shaft 5a to a predetermined depth. , The excavated soil is carried out of the mine, and the excavation free surface 3
4 is formed (FIGS. 2 and 3).

Next, the work status of the rotary excavator 17 and the breaker 18 is photographed by the TV cameras 21 and 21 equipped on the full swing excavator 16, and the T installed on the ground.
It is monitored by the V monitor 22, and based on this, the rotary excavator 17 or the breaker 18 is remotely operated from the ground.
While appropriately controlling the operation of (1), the inner peripheral portion of the vertical shaft 5a is excavated, and the excavated soil is collected in the central portion 33 of the bottom surface previously excavated.

Then, the excavated soil collected in the central portion 33 of the bottom surface is repeatedly moved up and down along the inner side of the guide pipe 3 by the gravity bucket excavator 14 to be carried out to the outside of the mine, that is, to be discharged.

After that, the guide pipe 3 is pulled up to a position where earth retaining works are to be carried out, and is fixed to the inner wall of the vertical shaft 5a by the gripper device 20. Then, as in the case of excavating the peripheral part, the spray manipulator 2 can be remotely operated from the ground.
5 is projected from the tip of the guide pipe 3 and is fixed to the inner surface of the guide pipe 3 by a spraying gripper 29, and the concrete 3 as shown in FIG.
5 or mortar is sprayed for earth retaining.

After the earth retaining on the inner wall surface of the vertical shaft 5a is completed, the spraying manipulator 25 is removed from the guide pipe 3, and the tip of the guide pipe 3 is again grounded to the excavated bottom surface.
The gravitational bucket excavator 14 is advanced on the inner side thereof to excavate the bottom center portion 33 of the vertical shaft 5a in advance.

To continue such a cycle of excavation, earth removal and earth retaining work, the guide pipe elevating jack 10 is repeatedly expanded and contracted, and the slide jack 12 and the guide pipe holding jack 2a are alternately actuated to move the guide pipe 3. While gripping, ascending / descending of the guide pipe 3, and if necessary, the crane pipe 15 is added to the guide pipe 3 to construct a predetermined supporting ground.

When excavating hard rock near the supporting ground, cracks are caused by dropping a weight (not shown), the rock is crushed by a breaker 18, and a drilling hole is drilled by a rock drill (not shown). After that, the rock is crushed by manually injecting a crushing agent or filling the blast. Then, similarly to the above, after the excavated soil is collected in the central portion 33 of the bottom surface of the vertical shaft 5a by the full swing excavator 16, the gravity type bucket excavator 14 carries the excavated soil out of the mines.

During the blasting work, the guide pipe holding device a
With the guide pipe lifting device b, the full swing excavator 1
6. The guide pipe 3 on which the gripper device 20 and the TV cameras 21 and 21 are mounted is lifted and retracted to a required safety position.

After the vertical shaft 5a is excavated and earth retaining is completed as planned, the full swing excavator 16, the gripper device 20, and the TV cameras 21, 21 are mounted by the guide pipe holding device a and the guide pipe lifting device b. The guide pipe 3 is pulled up as it is and returned to the installed state shown in FIG.

When constructing a plurality of vertical shafts 5a to 5f on the same site as shown in FIG. 9, the lifting devices 8 and 8 are extended to lower the wheels 7 and 7 onto the rails 4 and 4 and the machine frame. 1 is levitated from the ground surface, and the entire device is moved along rails 4 and 4 to the next vertical shaft construction position. At that position, the lift devices 8 and 8 are contracted to move wheels 7 and 7 from rails 4 and 4. The machine frame 1 is lifted, and the machine frame 1 is grounded and fixed on the ground surface at the construction position, and the same vertical shaft excavation work is performed again.

The guide pipe 3 is lifted by the lifting equipment 23.
By moving the mangage 24 up and down inside, the personnel can be moved up and down between the ground and the excavation bottom as shown in FIG.

In the above, when excavating the inner peripheral portion of the outer periphery of the bottom center portion 33, the upper base end of the guide pipe 3 is supported by the guide pipe elevating device b, and the lower end is grounded vertically to the excavated bottom surface. Since it is carried out by the full swing excavator 16 mounted on the guide pipe 3, the vertical shafts 5a-5
The construction accuracy of the inner wall surface of f can be improved. In this case, since it is not necessary to apply a reaction force to the existing earth retaining concrete 35, there is no fear of damaging the earth retaining concrete 35.

Further, since the guide pipe 3 partitions the inner peripheral portion of the vertical shafts 5a to 5f from the central portion of the bottom surface, the excavation of the inner peripheral portion of the vertical shafts 5a to 5f by the all-swivel excavator 16 and the excavated soil are excavated. It is possible to simultaneously construct the soil collection to the bottom surface central portion 33 and the soil discharge by the gravity type bucket excavator 14 of the bottom surface central portion 33, and the processing efficiency of carrying out the excavated soil in the vertical shafts 5a to 5f to the outside of the shaft is improved.

The full-swing excavator 16 mounted on the outer circumference of the guide pipe 3 and the spray manipulator 25 mounted on the guide pipe 3 are remotely controlled from the ground while monitoring the TV monitor 22, thereby narrowing the inside of the mine. The labor-intensive work caused by manual work in the space can be eliminated, and the work safety is improved.

[0047]

As is apparent from the above description, the present invention has the following effects. Since the tip of the guide pipe suspended vertically by the guide pipe lifting device supported on the machine frame installed on the ground was grounded and fixed to the excavation bottom of the vertical shaft, the gravity bucket excavator was moved up and down in the guide pipe. The construction accuracy and the construction speed of the shaft can be improved, and the excavation efficiency around the inner surface of the shaft can be improved by forming the free surface for excavating the center of the bottom surface of the shaft in advance.

By providing an all-rotation type excavating device which can freely rotate on the outer circumference of the guide pipe, the inner peripheral portion of the shaft can be excavated, and the excavated soil is collected in the already excavated bottom central portion. At the same time, by excavating it by the gravity type bucket excavator, it is possible to improve the construction efficiency of shaft excavation and excavation.

Since the guide pipe is pulled up, the spraying manipulator is projected downward from the tip of the guide pipe, and mortar or concrete can be sprayed on the inner wall surface of the excavated shaft for earth retaining.
The earth retaining works can be constructed up to the position near the bottom of the excavation of the vertical shaft, and the inner wall surface of the excavation can be promptly stabilized.

Since the wheels can be lowered onto the rails laid around a plurality of vertical shaft construction positions and thereby the machine frame can be floated from the ground surface, and the guide pipe can be pulled up by the guide pipe lifting device, As long as it is laid, the entire device can be moved to the next vertical shaft construction position as it is, and there is no need to disassemble or assemble the entire device for each vertical shaft as in the conventional device.

Since the guide pipes suspended by the guide pipe elevating device can be centered by radially arranging a plurality of guide cylinders on the machine frame, the guide pipes can be hung accurately, and the vertical direction can be improved. It is easy to secure excavation accuracy.

Further, according to the present invention, the preceding excavation of the central portion of the bottom surface of the vertical shaft is performed by the gravity type bucket excavator, and the guide pipe is not rotated by the tip edge of the guide pipe, so a mechanism for rotating the guide pipe is provided. do not need. Therefore, there is an advantage that the structure of the guide pipe lifting device can be simplified and downsized.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of a deep foundation shaft arranging device according to the present invention when a guide pipe lifting device is installed at a shaft arranging position.

FIG. 2 is a vertical cross-sectional view when the center of the bottom surface of the shaft is excavated in advance.

FIG. 3 is a vertical cross-sectional view when excavating the peripheral portion of the inner surface of the vertical shaft.

FIG. 4 is a vertical cross-sectional view when earth retaining of the inner wall surface of the vertical shaft is performed.

FIG. 5 is a vertical cross-sectional view when a worker is moved up and down on the same vertical shaft.

FIG. 6 is a cross-sectional view showing a gripper device for fixing the guide pipe to the vertical shaft.

FIG. 7 is a vertical cross-sectional view showing a full-swivel excavator mounted on the above guide pipe.

8 is a partially enlarged vertical sectional view of the rotary drive device of FIG.

FIG. 9 is a schematic plan view showing a guide pipe lifting device mounted on a rail laid around a plurality of vertical shaft construction positions.

FIG. 10 is a plan view showing the above guide pipe lifting device.

FIG. 11 is a plan view showing the above guide pipe holding device.

[Explanation of symbols]

 a guide pipe holding device b guide pipe lifting device 1 machine frame 3 guide pipe 4 rails 5a to 5f vertical shaft 6 machine frame 7 wheels 8 lift device 9 gripping member 10 guide pipe lifting jack 12 slide jack 13 guide cylinder 14 gravity bucket excavator 16 Full-swivel excavator 25 Spray manipulator 33 Bottom center 35 Concrete

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuya Kawamura 2 Sanbancho, Chiyoda-ku, Tokyo, Tobishima Construction Co., Ltd. (72) Inventor Shunji Saegusa 2 Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. Within

Claims (5)

[Claims] 1. A vertical shaft is constructed by installing a guide pipe holding device and a guide pipe lifting device on a machine frame installed at a vertical shaft construction position, and vertically moving inside a guide pipe suspended vertically by the guide pipe lifting device. Gravity bucket excavator that excavates the center of the bottom surface of the front, and a fully swivel excavator that is swivelly mounted on the outer periphery of the guide pipe and excavates the inner peripheral portion of the shaft, and the gravity bucket excavator. Similarly, a spraying manipulator that vertically moves inside the guide pipe and sprays mortar or concrete onto the inner wall surface of the vertical shaft that projects downward from the tip of the guide pipe to perform earth retaining is provided. Deep foundation shaft construction equipment. 2. The machine frame vertically hangs wheels that roll on rails laid around a plurality of vertical shaft construction positions via a lift device, and the lift device lifts the wheels, whereby 2. The machine frame is directly installed on the ground surface at the vertical shaft construction position, and the wheels are lowered onto the rails and the machine frame is floated from the ground surface so as to be movable. Deep foundation shaft construction equipment. 3. The guide pipe elevating device comprises a guide pipe elevating jack for elevating and lowering a grip member for grasping the guide pipe, and a slide jack for horizontally sliding the elevating jack, and the machine frame comprises the guide pipe. The deep foundation shaft arranging device according to claim 1 or 2, wherein a plurality of guide cylinders for centering a guide pipe suspended by the elevating device are radially installed. 4. A gravity-type bucket excavation in which the tip of a guide pipe vertically suspended by a guide pipe lifting device supported on a machine frame installed on the ground is grounded and fixed to the excavation bottom of a vertical shaft, and the guide pipe moves up and down. Machine excavates the center of the bottom of the shaft in advance and removes the soil, and excavates the periphery of the inner surface of the shaft with a full-swing type excavator that rotates around the outer circumference of the guide pipe. Gravel on the inner wall of the shaft and excavate it by the gravity bucket excavator, move up and down in the guide pipe, and project mortar or concrete on the inner wall surface of the shaft excavated downward from the tip of the guide pipe. A method for constructing a deep foundation shaft, which is characterized by spraying soil to keep the soil. 5. A machine frame supporting a guide pipe lifting device is moved to a vertical shaft construction position of a next order along a rail laid around a plurality of vertical shaft construction positions, and vertical shaft construction is performed at the positions. The method for constructing a deep foundation shaft according to claim 4.