JPH0821180A - Construction of shaft - Google Patents

Abstract

PURPOSE:To construct a shaft at low cost with a simple operation of work, and make a casing tube therefor reusable or available for diversion to other purposes. CONSTITUTION:While a cylindrical casing sube 2 is pressure-driven in rotation with a boring machine to a position where a shaft is constructed, the earth in the casing tube 2 is taken out by inside excavation work with an excavator. Then, an integrated cylindrical side wall body 9 is formed in the casing tube with a plurality of cylindrical side wall members erected with a crane, and thereby a shaft is constructed with a simple operation of work at low cost in a short period of time. The casing tube 2 is extracted with the boring machine and the crane while back-filling is made. Thereby, the casing tube 2 can be reused or diverted to other purposes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an underground
The present invention relates to a method of constructing a vertical shaft for efficiently constructing a vertical shaft for excavating a deep shaft of 0 m to 50 m, excavating a horizontal shaft provided in the ground, installation of the equipment, and maintenance and inspection of the equipment.

[0002]

2. Description of the Related Art As a conventional construction method of a shaft, there is a construction method in which a shaft is excavated by using both a shovel and a club bucket, and a caisson is laid to form a side wall of the shaft. However, this construction method has problems that the construction period is long and the construction cost is enormous. Therefore, JP-A-4
As disclosed in JP-A-108994, a shaft construction method has been proposed which eliminates the need for a large-scale muddy water facility, shovel, club bucket, and caisson, shortens the construction period, and reduces construction costs.

FIG. 16 shows the above-mentioned conventional example. This conventional example is a method of constructing a vertical shaft which is constructed with strong ground with little spring water or ground with improved ground. To briefly explain, first, the base machine 50 is installed on the ground as shown in FIG. 16A. The base machine 50 is a device that applies a rotational force to a casing tube 51 described later and pushes the casing tube 51 into the ground by hydraulic pressure. Therefore, the casing tube 51 is suspended by a crane (not shown), It is set on the base machine 50.
Then, the casing tube 51 is pushed into the ground while rotating, and the earth and sand generated in the casing tube 51 by the excavation is discharged to the outside by the hammer grab 52 suspended by the crane, and the pushing operation is continued.

In this case, it is necessary to push the casing tube 51 into the ground while adding the casing tube 51 depending on the depth of the ground. Therefore, when the casing tube 51 is replenished, the next casing tube is set on the joined casing tube 51 pushed to the upper part of the base machine 50 with a crane, and the joint portion of both casing tubes is manually bolted from the outside. Perform the work of connecting. By repeating the above operations, the casing tube 51 is pushed into a predetermined position. In addition, 53 in FIG. 16A shows the ground improved by chemical solution injection or the like.

After the excavation and building work is completed in this way,
As shown in FIG. 16B, a tremy pipe 54 for concrete pouring having a funnel-shaped receiving port at the upper end from the ground is arranged in the digging pit, and the concrete 56 is discarded on the digging bottom plate 55. The concrete 56 is hardened to prevent spring water from the lower end side of the casing tube 51,
It will be used as a work scaffold at the time of base concrete construction described later.

[0006] After the poured concrete 56 is hardened, base concrete serving as the bottom of the shaft is poured thereon as shown in FIG. 16C. For this purpose, first, a reinforcing bar 58 serving as a core material of the base concrete is assembled, and its outer peripheral end is fixed to the casing tube 51 by means such as welding. Then, concrete is poured through the tremie pipe 54 to finish the surface flat.

[0007] After the base concrete 56 serving as the shaft bottom is formed in this way, as shown in FIG. 16D, the casing tube 51 protruding from the road is partially removed, and the base machine 50 is further removed. Thereafter, removal of soil and the like adhering to the inner wall of the casing tube 51, rust prevention coating, and the like are performed to complete construction of the shaft with the casing tube 51 as a side wall.

[0008]

However, the above prior art has the following disadvantages. First, since the casing tube 51 made of steel was used as the side wall member of the shaft, rust and corrosion were easily generated, and the durability was lacking. If measures are taken to prevent rust or corrosion of the steel casing tube 51 in order to solve this problem, not only the troublesome work for that is required, but also a new problem arises that the cost is increased. Next, the conventional technique using the steel casing tube 51 has a problem that the member production cost is increased and the total cost for constructing one shaft is increased.

Next, according to the prior art, the casing tube 5
In addition to the necessity of removing the soil, rust, etc. attached to the inner wall of No. 1, painting must be performed in consideration of the internal environment of the mine, which required a certain construction period and complicated work. . Further, in the related art, the casing tube 51 is left behind in the mine and is used as it is as a side wall, so that the casing tube 51 cannot be reused or diverted. However, since the casing tube 51 is a very expensive member, there is a problem in that leaving and using the casing tube 51 causes an increase in the total cost of building the shaft.

[0010] The present invention is proposed to solve the above-mentioned disadvantages, and it is possible to construct a shaft with a simple process and at low cost, and to reuse and convert a casing tube used for the shaft construction. The purpose is to provide a construction method.

[0011]

In order to achieve the above-mentioned object, the present invention rotationally press fits a cylindrical casing tube into a shaft construction site by a boring machine, and
The earth and sand in the casing tube are discharged while excavating with a drilling tool, and then a plurality of concrete cylindrical side wall members are built in the casing tube by a crane to form an integral cylindrical side wall body, and then This is a vertical shaft construction method in which the casing tube is pulled out by a boring machine and a crane. In addition, the concrete cylindrical side wall member to be built first in the casing tube is a bottomed cylinder, and after placing the concrete on the bottomed cylinder installation ground, the bottomed cylinder is built in, and the boring machine and This is a construction method of a vertical shaft in which the backfill filler is poured into the gap between the cylindrical side wall body and the ground when the casing tube is pulled out by the crane. Also, while the casing tube is rotationally press-fitted into the shaft construction site by the boring machine, the earth and sand in the casing tube are discharged while excavating with an excavator, and then the casing tube is rotated about its axis as necessary,
Installation of a bottomed cylinder body A circular box formwork and horizontal adjuster are installed on the ground, and waste concrete is placed in the circular box formwork, and then a concrete bottomed cylinder body is built on the waste concrete by a crane. After that, a plurality of concrete cylindrical side wall members are sequentially built and bolted to each other to form an integral cylindrical side wall body, and then the casing tube is pulled out by a boring machine and a crane and the cylindrical side wall body is formed. It is a construction method of a vertical shaft in which a backfill filler is poured into a gap between the ground and the ground. In addition, after installing the casing tube at the vertical shaft construction site with a boring machine,
Installation of a bottomed cylindrical body A concrete bottomed cylindrical body is placed by placing concrete on the ground, then using a crane to provide a positioning device at the bottom, a spacer at the top, and a steel rod that penetrates the thick wall. Built in the ground, then rotate the casing tube around its axis as necessary, and install a plurality of concrete cylindrical side wall members with spacers on the top and steel rod through holes formed in the thick part. The steel rod is used as a guide to sequentially form an integral cylindrical side wall body, and then the steel rod is tensioned to tighten the entire integral cylindrical side wall body, and then the casing tube is pulled out by a boring machine and a crane. This is a construction method of a vertical shaft that is made by pouring backfill filler into the gap between the cylindrical side wall and the ground. In addition, after installing the casing tube in the vertical shaft construction site by the boring machine, water is poured into the casing tube, and then the bottomed concrete cylinder with the spacer with the hanging hole is formed on the upper part by the crane. The bottomed cylindrical body is temporarily placed on the top of the casing tube by removing the crane hook from the bottomed cylindrical body by passing the bar through the spacer with the hanging hole, and then the first spacer provided with the spacer with the hanging hole on the upper side by the crane. After the cylindrical side wall member is placed on the bottomed cylindrical body and connected, the bar is passed through the spacer with the hanging hole and the crane hook is removed from the first cylindrical side wall member to thereby attach the first cylindrical side wall member to the top of the casing tube. Temporarily, then pour water into the connected cylindrical side wall members and While balancing the buoyancy, a plurality of concrete cylindrical side wall members are sequentially built in to form an integral cylindrical side wall body, and then the casing tube is pulled out by a boring machine and a crane, and the cylindrical side wall body and the ground are separated. This is a vertical shaft construction method in which the backfill filler is poured into the gap.

[0012]

After forming the cylindrical side wall body in the ground, the used casing tube is pulled out from the ground, so that it can be reused and diverted. Further, since the filler is injected between the cylindrical side wall body and the ground, the stability of the cylindrical side wall body in the ground can be achieved.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, in which construction is performed on a solid ground with little spring water or a ground with improved ground. First, the boring machine and crane device are installed on the ground. These may be performed using well-known ones, but to briefly explain,
The boring machine has a base machine 1, which is provided with a clamp device for clamping the casing tube 2 and a turning device for turning the clamp device. Then, the casing tube 2 is turned around its axis and simultaneously lowered toward the ground. The earth and sand in the casing tube 2 is excavated and excavated by raising and lowering an excavating machine provided in a crane device to construct a shaft.

Before the work of press-fitting the casing tube 2 into the ground by a boring machine, the ground around the bottom of the shaft is improved by taking measures such as chemical injection. Reference numeral 3 indicates a portion where the ground has been improved. After such ground improvement, the casing tube 2 is pushed into the ground while rotating, and at the same time, the earth and sand in the casing tube 2 is excavated and excavated by an excavating machine.

In the following, the steps of the shaft construction work will be specifically described. After the ground improvement around the shaft bottom is performed as described above, the concrete 7 is poured into the shaft 5 in the casing tube 2 and the concrete 7 is poured. . For this purpose, first, the casing tube 2 is pushed in by a predetermined depth, and after the inside excavation and the earth discharging operation are completed, the circular box form 4 as shown in FIG. 1A is assembled on the shaft shaft 5. The circular box form 4 has a donut-like shape and is for maintaining a constant flat shape until the cast concrete is solidified. The circular box form 4
Since the casing tube 2 is pulled out while rotating later, a predetermined space is formed between the casing tube 2 and the inner wall of the casing tube 2 so that the circular casing 4 does not hinder the drawing.

Next, the horizontal adjustment fitting 6 is attached.
This horizontal adjustment metal fitting 6 is used to maintain the horizontal accuracy of a finished surface 7a of the later-described waste concrete 7, and is composed of screws, bolts, etc., and is adjusted to the circular box form 4 as shown in FIG. 1A. Mounted as possible.
After the horizontal adjustment bracket 6 is attached in this manner, the circular box form 4
Concrete is poured from the ground through a tremy tube (not shown), and the finished surface is finished horizontally in accordance with the level adjustment fitting 6. During the above series of operations, in order to prevent the casing tube 2 from coming off due to the resistance with the natural ground 8, the casing tube 2 is rotated about its axis through the boring machine as needed.

Next, after the waste concrete 7 is hardened, as shown in FIG. 1B, a cylindrical side wall member, which is a precast member, is sequentially built into the casing tube 2 via a ground crane as shown in FIG. 1B. . This precast member is constructed such that a member manufactured in advance at a factory or the like is transported to the site and then built in, and assembled while connecting the cylindrical side wall members with bolts, steel rods or the like. Therefore, as shown in FIG. 1B, first, the precast base 9e
The bottomed cylindrical body 9a having the following structure is erected on the discarded concrete 7, and then the first cylindrical side wall member 9b, the second cylindrical side wall member 9c, and the third cylindrical side wall member 9d are sequentially cylindrically formed. The bolts are connected from the inside of the side wall member while being bolted together, and an integral cylindrical side wall body 9 is assembled. During this time, in order to prevent the casing tube 2 from coming off due to the resistance with the natural ground 8, the casing tube 2 is rotated about its axis as needed through the boring machine.

When the assembly of the integral cylindrical side wall member 9 is completed in this way, the cylindrical side wall member 9 is attached to the casing tube 2.
A gap 10 is formed between the inner wall and the inner wall, so that the mine is in an upright state. Therefore, as shown in FIG. 1C, the casing tube 2 is pulled out via a boring machine while the cylindrical side wall body 9 is left in the downhole. In this case, at the same time as the casing tube 2 is pulled out, the filler 11 is charged into the gap 10 from the ground via a tremy tube, and the space between the ground and the casing tube 2 is backfilled. Thus, when the operation of pulling out the casing tube 2 is completed, backfilling of the filler 11 is also completed.

The first embodiment is carried out through the working steps as described above. According to this method, a cylindrical side wall member 9 is formed by a cylindrical side wall member made of precast concrete, and then this cylindrical side wall member 9 is formed. Since the casing tube 2 is left inside the pit and pulled out, the expensive casing tube 2 can be diverted and reused. Also,
The remaining cylindrical side wall body 9 is made of factory-produced concrete, which is relatively inexpensive to manufacture, and because it is made of concrete, there is no danger of rusting, corrosion, etc. Is unnecessary. Therefore, it is possible to construct a shaft at a low cost within a short period of time. Moreover, since concrete is cast on the bottomed cylinder installation ground via the circular box formwork 4 and the horizontal adjustment metal fitting 6, the bottomed cylinder 9a can be stably built. Furthermore, since concrete is poured between the cylindrical side wall body 9 and the natural ground 8, a stable installation state of the cylindrical side wall body 9 can be realized.

FIG. 2 et seq. Show a second embodiment of the present invention, which is a method of assembling a cylindrical side wall body in a shaft which has been excavated underwater. The step of performing underwater excavation with a casing tube using a boring machine provided on the ground is substantially the same as that of the first embodiment, and a description thereof will be omitted.
Therefore, as shown in FIG. 2A, first, underwater excavation is performed, and then the bottomed cylindrical body 9a having the precast base 9e is built.

As shown in FIGS. 2B and 3, the bottomed cylindrical body 9a is hung by a crane hook 12 and built into the casing tube 2 by a crane (not shown). A spacer 13 for adjusting the gap between the bottomed cylinder 9a and the inner wall of the casing tube 2 is provided above the bottomed cylinder 9a. To stabilize the cylindrical side wall 9 in the above.
2C to 2F show embodiments of the above-mentioned spacer 13. FIG. 2C shows a bottomed cylindrical body 9a provided with a spring steel material 14. FIG. FIG. 2D shows a bottomed cylindrical body 9a provided with hard rubber 15. FIG. 2E
Is a bottomed cylindrical body 9a provided with a spring bearing 16. FIG. 2F shows an air tube 17 provided on the bottomed cylindrical body 9a.

Further, since the bottomed cylindrical body 9a is built at the lowermost stage in the casing tube 2 and is fixed to the shaft, the precast base 9 is in contact with the shaft.
A positioning device 18 that extends and contracts in conjunction with the rotation of a PC steel bar described later is provided at four locations on the outer periphery of e.
That is, after the bottomed cylindrical body 9a is installed on the shaft of the shaft, the positioning device 18 is operated by operating the PC steel rod from the ground to move the bottomed cylindrical body 9a to the design position.

The bottomed cylindrical body 9a thus configured is
As shown in FIG. 2A, it is built into the casing tube 2 via a crane. In this case, a tremy tube 19 for supplying concrete is simultaneously added to the shaft and reaches the bottom of the shaft. FIG. 3 shows this state. After that, concrete is poured into the shaft from the ground via a tremy pipe 19, and the bottom surface of the bottomed cylindrical body 9a is fixed to the shaft (FIG. 5). In addition, the casing tube 2 is rotated while waiting for the concrete poured in the state of FIG.

By the way, in the thick portion of the bottomed cylindrical body 9a,
As shown in the sectional view of FIG.
A PC steel rod 20 is penetrated in the axial direction of a. Then, as shown in FIG. 5, after fixing the bottomed cylindrical body 9a to the shaft, the first cylindrical side wall member 9b is inserted into the steel rod penetration hole formed in the thick part of the PC steel rod 20 (tensile). By doing so, it is built on the bottomed cylindrical body 9a while penetrating concrete (which gives prestress to the concrete) (FIG. 6), and similarly, the second cylindrical side wall member 9c and the third cylindrical side wall member 9d And will be built in the shaft one by one. In this way, after assembling the cylindrical side wall member to the uppermost level, draining the inside of the shaft, and further tightening the PC steel bar 20 above the uppermost level tightens the entire cylindrical side wall member, and connects the connection bolts and the like. The entire cylindrical side wall member is integrated without using it (FIG. 7).

Next, when the assembly of the cylindrical side wall body 9 is completed in this way, the cylindrical side wall body 9 is fixed to the casing tube 2.
A gap 10 is formed between the inner wall and the inner wall to stand upright in the shaft.
Therefore, as shown in FIG. 8, with the cylindrical side wall body 9 left in the mine, the casing tube 2 is pulled out. In this case, at the same time as the casing tube 2 is pulled out, the filler 11 is put into the gap 10 from the ground, and the space between the ground and the casing tube 2 is backfilled.

The second embodiment is carried out through the working steps as described above. According to this method, after the underwater excavation, the cylindrical side wall member 9 is formed by the cylindrical side wall member made of precast concrete, and then this Since the cylindrical side wall body 9 is left in the vertical shaft and the casing tube 2 is pulled out, the expensive casing tube 2 can be diverted and reused. Further, since the entire cylindrical side wall member is tightened by using the PC steel rod 20, the assembly can be performed without the need for connecting the cylindrical side wall members, and the efficiency of the assembling operation can be improved. In addition, the remaining cylindrical side wall 9 is made of concrete, which is relatively inexpensive in terms of material production cost, and since it is made of concrete, there is no danger of rusting, corrosion, etc., and further, internal finishing work such as kerosene and painting is unnecessary. And Therefore, it is possible to construct a shaft at a low cost within a short period of time.

FIG. 9 et seq. Show a third embodiment of the present invention, which is a method of assembling a cylindrical side wall body in water. First, as shown in FIG. 9, underwater excavation is performed using the casing tube 2 using a boring machine (not shown).
Then, the casing tube 2 is filled with water 22. Next, as shown in FIG. 10, the bottomed cylindrical body 9a is suspended via a crane (not shown). The bottomed cylindrical body 9a is formed integrally with the precast base 9e and the side wall member as in each of the above-described embodiments, and further the spacers 13 are provided at four locations on the upper outer periphery.

FIG. 11 is a top perspective view of the bottomed cylindrical body 9a. As shown in FIG.
Are formed at two places on the diameter line of the bottomed cylindrical body 9a, and the first spacer 13a has a hanging bar 2 described later.
3 is formed. Also, the first spacer 1
Second spacers 13b are formed at two positions on a diameter line perpendicular to the diameter line of the bottomed cylindrical body 9a on which the 3a is formed.

Therefore, when suspending the bottomed cylindrical body 9a in the casing tube 2, the first spacer 13a
Is located on the top of the casing tube 2, the hanging bar 23 is passed through a hole through which the hanging bar 23 is passed, and the crane hook 12 is removed to support the bottomed cylindrical body 9a on the casing tube 2 top. .

Next, as shown in FIG. 12, the first cylindrical side wall member 9b is suspended by a crane and placed on the bottomed cylindrical body 9a. Then, the both are connected from the outside with a bolt or the like.
After the connection, the two are lifted by a crane, and the bottomed cylinder 9
Then, the hanging bar 23 supporting the member a is taken out, and the bottomed cylindrical body 9a and the first cylindrical side wall member 9b are lowered into the casing tube 2 as shown in FIG. And
When the first cylindrical side wall member 9b is suspended down to the top of the casing tube 2, the suspension bar 2
The first cylindrical side wall member 9b is supported by the top of the casing tube 2 by removing the crane hook 12 and hanging the crane hook 12 through the hanging bar 23 through the hole through which the casing 3 passes.

In this case, since the inside of the casing tube 2 is filled with water, there is a possibility that buoyancy acts on the built-in cylindrical side wall member to float in the water. Therefore, while the hollow portion of the cylindrical side wall member is filled with an appropriate amount of water, the balance is maintained and the building is continued. This balance can be achieved, for example, by connecting the load cell 24 of the crane and the hollow portion water injection window 25 formed in the lower portion of the bottomed cylindrical body 9a by wire or wirelessly via the computer 26 as shown in FIG. Knot them so that they will be controlled within the crane's suspension load range.

When the precast base 9e of the bottomed cylindrical body 9a comes into contact with the shaft, the crane hook 12 is released to complete the installation. FIG. 15 shows this state. In the third embodiment, since the cylindrical side wall member is built using buoyancy in water, a huge crane is not required even if the weight of the entire cylindrical side wall member is 100 t or more. You can work with.

When the cylindrical side wall member is erected in the state shown in FIG. 15, concrete may be cast between the precast base 9e below the bottomed cylindrical body 9a and the shaft bottom to be fixed. After the above steps are completed, the filler is injected between the ground and the cylindrical side wall while pulling out the casing tube 2 as in the above embodiments.

In the third embodiment, through the above-described working steps, the construction of the shaft in the water is carried out smoothly utilizing the buoyancy of the cylindrical side wall member in the water. In this embodiment, the cylindrical shaft made of precast concrete is also used. The cylindrical side wall member 9 is formed by the cylindrical side wall member, and thereafter, the cylindrical side wall body 9 is left in the shaft and the casing tube 2 is pulled out, so that the expensive casing tube 2 can be diverted and reused. . In addition, the remaining cylindrical side wall body 9 is made of concrete, which is relatively inexpensive in terms of member production cost, and since it is made of concrete, there is no danger of rust, corrosion, etc. Not required. Therefore, it is possible to construct a shaft at a low cost within a short period of time.

[0035]

As described above, according to the present invention, after the cylindrical side wall body is formed in the ground, the used casing tube is pulled out from the ground, so that it can be reused and diverted.
Moreover, since the filler is injected between the cylindrical side wall body and the ground, the stability of the cylindrical side wall body at the building site can be achieved. In addition, the cylindrical side wall body left in the mine is made of concrete produced at a factory, which is relatively inexpensive to manufacture, and because it is made of concrete, there is no risk of rust, corrosion, etc. Internal finishing work is unnecessary. Therefore, it is possible to construct the shaft in a simple process at low cost and in a short period of time. In addition, since concrete is poured into the bottomed cylindrical body installation ground via the circular box formwork and the leveling bracket, the bottomed cylindrical body can be stably built. In addition, since the entire cylindrical side wall member is tightened by using a PC steel rod, assembly becomes possible without the need for connection work between the cylindrical side wall members.
The efficiency of assembly work can be improved. Further, since the vertical shaft is built in water by utilizing the buoyancy of the cylindrical side wall member, the cylindrical side wall member 9 can be efficiently constructed in water by the cylindrical side wall member made of precast concrete.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a method of constructing a vertical shaft according to a first embodiment.

FIG. 2 shows a part of a process related to a method of constructing a shaft according to a second embodiment, a sectional view of a bottomed cylinder, and an embodiment of a spacer provided on the bottomed cylinder.

FIG. 3 shows a part of a process relating to a method of constructing a vertical shaft according to a second embodiment.

FIG. 4 is a cross-sectional view of a bottomed cylindrical body in a casing tube.

FIG. 5 illustrates a part of a process related to a method of constructing a shaft according to a second embodiment.

FIG. 6 shows a part of the steps involved in the method of constructing a vertical shaft according to the second embodiment.

FIG. 7 shows a part of a process related to a method of constructing a shaft according to a second embodiment.

FIG. 8 illustrates a part of a process relating to a method of constructing a shaft according to a second embodiment.

FIG. 9 shows a part of a process relating to a method of constructing a vertical shaft according to a third embodiment.

FIG. 10 illustrates a part of a process relating to a method of constructing a shaft according to a third embodiment.

FIG. 11 is a top perspective view of a bottomed cylindrical body used in a method of constructing a shaft according to a third embodiment.

FIG. 12 shows a part of the process relating to the method of constructing a vertical shaft according to the third embodiment.

FIG. 13 shows a part of a process related to a method of constructing a shaft according to a third embodiment.

FIG. 14 shows a part of the process relating to the method of constructing a vertical shaft according to the third embodiment.

FIG. 15 shows a part of the process relating to the method of constructing a vertical shaft according to the third embodiment.

FIG. 16 shows a vertical shaft construction method according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base machine 2 Casing tube 3 Improved ground 4 Circular form 5 Vertical shaft 6 Horizontal adjusting metal 7 Discarded concrete 7a Finished surface 8 Ground 9 Cylindrical side wall 9a Bottomed cylindrical body 9b First cylindrical side wall member 9c Second 9d cylindrical side wall member 9d third cylindrical side wall member 10 void 11 filler

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Wataru Morijiri 3-23-14 Takanawa, Minato-ku, Tokyo Inside Japan Comsys Co., Ltd. (72) Masami Iwasa 3-23-14 Takanawa, Minato-ku, Tokyo Japan Comsys Co., Ltd. (72) Inventor Shuichi Suzuki, 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Hajime Yagi 1-1-6 Uchisai-cho, Chiyoda-ku, Tokyo Nihon Hon Telegraph and Telephone Corp. (72) Inventor Takao Whalei 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Telegraph and Telephone Corp. (72) Inventor Susumu Watanabe 4-13-13 Akasaka, Minato-ku, Tokyo Kyowa Exio (72) Inventor Koji Itagaki 4-13-13 Akasaka, Minato-ku, Tokyo Kyowa Exio Co., Ltd. (72) Inventor Toshio Abe 4 Akasaka, Minato-ku, Tokyo 13th in the No. 13, Inc. Kyowa Exeo Corporation

Claims (5)

[Claims] 1. A boring machine is used to rotationally press fit a cylindrical casing tube into a shaft construction site, and
The earth and sand in the casing tube is discharged while excavating with an excavator attached to the boring machine, and then a plurality of concrete cylindrical side wall members are built in the casing tube by a crane to form an integral cylindrical side wall body. A method for constructing a vertical shaft, which comprises forming and then pulling out a casing tube by the boring machine and a crane. 2. A concrete-made cylindrical side wall member built first in a casing tube has a bottomed cylindrical body,
Installation of bottomed cylindrical body After placing concrete on the ground, the bottomed cylindrical body is built, and when the casing tube is pulled out by a boring machine and a crane, a backfill filler in the gap between the cylindrical side wall body and the ground. The method for constructing a vertical shaft according to claim 1, wherein the method is used for pouring. 3. A casing tube is rotationally press-fitted into a shaft construction site by a boring machine, and the earth and sand in the casing tube are discharged while being dug by an excavator, and then the casing tube is rotated around its axis as required. In addition, a circular box form and a horizontal adjuster are installed on the ground where the bottomed cylindrical body is installed, and the concrete is cast into the circular box form, and then a concrete bottomed cylindrical body is placed on the discarded concrete by a crane. After building, the multiple cylindrical side wall members made of concrete are sequentially installed and bolted to each other to form an integral cylindrical side wall body,
Next, a method of constructing a shaft, wherein a casing tube is pulled out by a boring machine and a crane, and a backfill filler is poured into a gap between the cylindrical side wall body and the ground. 4. A casing tube is installed at a shaft construction site by a boring machine, concrete is cast on a bottomed cylinder installation ground, and a positioning device is further provided at a lower portion by a crane, and a spacer is provided at an upper portion, and a thick portion is provided. A concrete bottomed cylinder with a steel rod penetrated in it is built on the bottomed cylinder installation ground, and then, if necessary, the casing tube is rotated about its axis, and a spacer is provided at the top and a thick part A plurality of concrete cylindrical side wall members having steel rod through holes formed therein are sequentially built using the steel rod as a guide to form an integral cylindrical side wall body, and then the steel rod is tensioned to form an integral cylindrical side wall. Tighten the entire side wall,
Next, a method of constructing a shaft, wherein a casing tube is pulled out by a boring machine and a crane, and a backfill filler is poured into a gap between the cylindrical side wall body and the ground. 5. A casing tube is installed at a shaft construction site by a boring machine, water is filled in the casing tube, and then a concrete bottomed cylindrical body having a spacer with a suspension hole formed at an upper portion by a crane is used for the casing tube. The bottomed cylinder was temporarily placed on the top of the casing tube by removing the crane hook from the bottomed cylinder through the bar through the spacer with the suspension hole, and then the spacer with the suspension hole was provided at the top by the crane. After the first cylindrical side wall member is placed on the bottomed cylindrical body and connected thereto, the crane hook is removed from the first cylindrical side wall member through a bar through a spacer with a suspension hole, thereby removing the first cylindrical side wall member. Temporarily fix it to the top of the casing tube, and then pour water into the connected cylindrical side wall member to A plurality of concrete cylindrical side wall members are sequentially built while balancing buoyancy in the tube to form an integral cylindrical side wall, and then the casing tube is pulled out by a boring machine and a crane, and the cylindrical side wall is formed. A vertical shaft construction method characterized by pouring backfill filler into the gap between the ground and the ground.