JP2001003676A - Staircase in shaft and construction method - Google Patents

Abstract

(57) [Summary] [Problem] To improve workability, shorten the construction period, and reduce the construction cost. SOLUTION: A plurality of first joints 3 are manufactured at a factory or a work place outside a shaft, and are respectively provided on an upper end face and a lower end face.
A plurality of unit tubular bodies 1 made of concrete having substantially the same cross-sectional shape and having the first and second joint portions 32 are stacked so that the hollow portions are continuous on a base 80 provided at the bottom of the shaft, and The first joint portion 31 of the lower unit cylindrical body 1 and the upper unit cylindrical body 1 are located between two overlapping unit cylindrical bodies 1 and 1.
Characterized in that they are connected by the second joint part 32 of the above.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a staircase permanently constructed in a shaft and a method of constructing the staircase. The staircase according to the present invention is used for maintenance / management of sewers and other underground facilities provided at the bottom of the shaft, but can of course be used during construction of the underground facilities.

[0002]

2. Description of the Related Art Conventionally, a staircase in a shaft, that is, a peripheral wall of the staircase is constructed together with a stair portion by casting concrete in place. In short, it is very common to construct by forming the formwork, arranging the reinforcing steel bars, placing concrete, and dismantling the formwork several times repeatedly from the bottom of the shaft. Method. Also,
According to this method, it is necessary to assemble a large scaffold around the staircase to be formed.

[0003] In the construction of such a conventional staircase, the workability (workability) is poor, the construction period is long, and the construction cost is high. There is.

[0004]

SUMMARY OF THE INVENTION In view of the problems of the prior art, a staircase in a shaft and a method of constructing the same according to the present invention are intended to improve workability (construction workability), shorten the construction period, and reduce construction costs. It has been proposed for the purpose of planning.

[0005]

In order to achieve the above object, a staircase in a shaft according to claim 1 of the present invention is provided in a depth direction in a shaft, and a factory or a plant outside the shaft in an internal space. A staircase to which a staircase body and a landing manufactured at a work place are assembled, and manufactured at a factory or work place outside a shaft,
A plurality of unit tubular bodies made of concrete having substantially the same cross-sectional shape and having a plurality of first joint portions and a second joint portion at an upper end surface portion and a lower end surface portion, respectively, are hollowed on a base provided at a shaft bottom. Parts are stacked so as to be continuous, and between two unit cylinders that are vertically overlapped is the first unit cylinder of the lower unit cylinder.
It is characterized in that the joint is connected to the upper unit cylindrical body by a second joint.

According to a second aspect of the present invention, in the staircase of the vertical shaft according to the first aspect, the unit cylindrical body has a rectangular cross-sectional outer shape, and at least a unit corresponding to a ring beam in the vertical shaft. A part of the outer surface of the body of the cylindrical body is formed as a cutout surface along the curved inner surface of the ring beam, and the unit cylindrical body has a cutout surface abutting on the curved inner surface of the ring beam. .

[0007] Further, the invention of claim 3 is based on claim 1 or 2
In the staircase in the shaft described above, the stairs consist of a staircase body, a landing, and a handrail, and the staircase body, the landing, and the handrail are each used as a unit staircase body, a landing board, and a unit handrail at a factory or a work place outside the shaft. It is characterized in that an arbitrary number of unit staircase bodies, landing boards, and unit handrails are manufactured and assembled into a plurality of unit cylindrical bodies stacked in a shaft.

Further, according to a fourth aspect of the present invention, in the staircase in the vertical shaft according to any one of the first to third aspects, a plurality of piles are fixed so as to be in contact with the inner surface of the ring beam in the vertical shaft. The unit tubular body is stretched over both ends on a ring beam, and is pressed by a steady member fixed to the ring beam and / or the continuous underground wall. In addition, the invention of claim 5 is characterized in that in the staircase in the shaft according to claim 3 or 4, both the unit staircase main body and the landing plate are made of reinforced concrete.

According to a sixth aspect of the present invention, there is provided a method for constructing a stairway difference in a shaft, wherein the staircase body is provided in a depth direction in the shaft and manufactured in a factory or a work place outside the shaft in an internal space. A method of constructing a staircase to which a landing is assembled, which is manufactured in a factory or a work place outside a shaft, and has a plurality of first joint portions and a plurality of second joint portions on an upper end surface portion and a lower end surface portion, respectively. A plurality of unit tubular bodies made of reinforced concrete of substantially the same shape are sequentially suspended from the outside of the shaft, stacked in such a way that the hollow portion is continuous on the base provided at the bottom of the shaft, and two unit tubular bodies overlapping vertically The space is connected by the first joint of the lower unit cylindrical body and the second joint of the upper unit cylindrical body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. 1 to 5,
Reference numeral 10 denotes a shaft, reference numeral 20 denotes a continuous underground wall made of reinforced concrete and forms an inner wall of the shaft 10, and reference numeral 30 denotes an inner surface of the continuous underground wall 20 at an appropriate distance in the depth direction to resist earth pressure. A ring beam made of reinforced concrete provided integrally, 40 is a sewer and other underground facilities provided at the bottom of the shaft, 50 is a frame of a screen room for removing wastes forming part of an underground facility (sewer), 60 is The grating which is a lid member of a shaft is shown respectively.

The staircase 70 according to the present invention, that is, the peripheral wall of the staircase is constructed in the depth direction in the shaft 10 having the above-described structure, and its internal space includes a factory outside the shaft. Alternatively, a staircase 2 manufactured at a work place is assembled and fixed. The staircase 2 in the illustrated example is an arbitrary number of unit staircase bodies 2
1, a staircase main body 2 which is composed of a landing board 22 and a unit handrail 23, but has a low staircase room 70 and is attached thereto.
When 1 is not folded back, the assembling of the handrail 23 can be omitted.

The staircase 70 is formed by stacking a plurality of unit tubular bodies 1 made of reinforced concrete having substantially the same cross-sectional shape on a base 80 provided at the bottom of a shaft, and overlapping two unit tubular bodies 1 vertically. 1 is connected to each other by a plurality of joints 3. In addition, the depth of the continuous underground wall 20 of the shaft 10,
An example of the height or the like of the staircase 70 is as follows. Depth of continuous underground wall: 96.8 m Inner diameter of continuous underground wall: 12.5 m Inner diameter of ring beam: 10.5 m Height of staircase: 62.8 m

The unit tubular body 1 is made of reinforced concrete using a form in a factory or a work place outside the shaft, and as shown in FIG. It is preferably formed in a rectangular shape for convenience of assembling and fixing the stairs 2. In the figure, reference numeral 11 denotes a thick portion for increasing the strength of a corner portion, and 12 denotes a curved inner surface 3 of a ring beam 30 as much as possible to stack the unit cylindrical bodies 1 to be stacked.
A cutout surface provided to enable installation near 0a, 13 is a window for daylighting, 14 is a joint groove provided on an inner peripheral ridge at an upper part and / or a lower part of the unit cylindrical body 1, and 15 is a unit. It is an insert fitting as a buried metal when a scaffold is temporarily provided inside the tubular body 1.

An example of the size of such a unit cylindrical body 1 is as follows: width × depth × height is 5.6 m × 2.5 m × 1.
At 3m, the weight is about 14t. However, all the unit cylindrical bodies 1 used in one staircase 70 are not the same shape, and for example, those shown in FIGS. 7 and 8 in addition to those shown in FIG.

An opening 16 for providing a door frame is provided on one side of the unit cylindrical body 1 shown in FIG.
A step 17 for fixing the landing plate 22 of the staircase 2 is provided on one side of the upper surface of the unit cylindrical body 1 shown in FIG. Although not shown, unit cylindrical bodies having different heights are used in addition to the above, for the purpose of, for example, adjusting the height position of a door 18 provided at a location corresponding to the ring beam 30 of the staircase 70. You can also.

Further, a plurality of first joint portions 31 and a plurality of second joint portions 32 are provided on the upper end face portion and the lower end face portion of each unit cylindrical body 1, respectively. The first joint portion 31 of the lower (lower) unit cylindrical body 1 and the first joint portion 31 of the upper (upper) unit cylindrical body 1 are located between the two unit cylindrical bodies 1, which are vertically overlapped and adjacent to each other. It is connected and fixed by the two joint portions 32. In other words, the joint 3 that couples and fixes the upper and lower two unit cylindrical bodies 1 and 1 according to the present invention includes the first joint part 31 provided on one unit cylindrical body 1 and the other unit cylindrical body. It is constituted by one second joint part 32. However, the first joint part 31 and the second joint part 31
When connecting the joint portions 32, there are a case where only the joint portions 31 and 32 previously mounted on the unit cylindrical body 1 are connected, and a case where the joint portion 32 is connected using a separately prepared bolt, nut or washer. .

FIG. 10 shows the joint 3 employed in the embodiment of the present invention in further enlarged detail. The joint 3 includes a female screw member as a first joint portion 31 embedded and fixed along an inner wall side portion of an upper end surface portion of one unit cylindrical body 1 and an inner wall at a lower end surface portion of the other unit cylindrical body 1. A U-shaped mounting plate having a bolt insertion hole 32a as a second joint portion 32 embedded and fixed along the side portion. In FIG. 10, reference numeral 31a denotes a female screw member 31.
An anchor bar 32b is an anchor bar fixed to the second joint portion 32. Reference numeral 32b denotes a bolt mounting port provided in the other unit cylindrical body 1.

According to the joint 3 described above, after the separately prepared bolt 33 is inserted into the bolt insertion hole 32a of the mounting plate 32 via the washer 34, the bolt 33 is further screwed into the female screw member 31, whereby the first The female screw member of the joint part 31 and the U-shaped mounting plate of the second joint part 32 are fastened to each other, and the two unit cylindrical bodies 1, 1 overlapping vertically are thereby fastened.
The connection can be made.

The first and second joint portions 31, 32 provided along the inner wall side of each unit cylindrical body 1 in the joint 3 in pairs form a plurality of unit cylindrical bodies stacked up. Since the fastening work with the bolt 33 can be performed from the inside of the unit 1, the scaffold only needs to be provided inside the unit tubular body 1. That is, the scaffold outside the unit cylindrical body 1 can be omitted.

FIG. 11 shows another joint 3 which can be used in place of the joint 3 shown in FIG. This joint 3
Is engaged with a pin as a first joint portion 35 buried and fixed to an upper end surface portion of one unit tubular body 1 and as a second joint portion 36 buried and fixed to a lower end surface portion of the other unit tubular body 1. And an assembly. The engagement assembly 36 includes a board 36b having a receiving hole 36a, a cap 36c fixed inside the board 36b, and a plurality of claw pieces 36d sandwiched between the board 36b and the base of the cap 36c. Stop spring plate 3
6e. In FIG. 11, reference numeral 35a
Is an anchor bar fixed to the pin 35, and 36f is an anchor bar fixed to the board 36b of the engagement assembly 36.

According to such a joint 3, a plurality of pins as the first joint portions 35 in the uppermost one of the unit cylindrical bodies 1 stacked one after another on the base 80 at the bottom of the shaft,
Next, the plurality of engagement assemblies as the second joint portions 36 in the unit tubular body 1 suspended by a crane or the like are aligned with each other, and the second joint using the own weight of the upper unit tubular body 1 is used. When the portion 36 is fitted to the first joint portion 35 of the lower unit cylindrical body 1, the two 35 and 36 are automatically connected. Once the pin 35 and the engagement assembly 36 are fitted together, the pin 35 and the engagement assembly 36 are connected in a state where they cannot be pulled out due to the presence of the check spring plate 36e of the engagement assembly 36.

As joints 3 between two vertically adjacent unit assemblies 1 and 1, as shown in FIGS. 10 and 11, a well-known joint for joining two adjacent segments used in the shield method is used. Most segment or ring joints are available.

In FIGS. 1 to 4, reference numeral 4 denotes a steady rest made of H-section steel or the like. This steady rest member 4
Is provided in order to further stabilize the construction state of the plurality of unit cylindrical bodies 1 which are stacked in contact with the inner surfaces of the plurality of ring beams 30 in the shaft and fixed by the joint 3, and are partially provided. Alternatively, they are arranged so as to occupy the positions of the strings on all the ring beams 30.

Referring to FIG. 4 more specifically,
Both ends of each steady rest member 4 are bridged over the ring beam 30, and each end is fixed to the upper surface of the ring beam 30 via a mounting bracket 41. In addition, both ends of the steady rest member 4 can be fixed to the continuous underground wall 20. The space between the ring beam 30 and the mounting bracket 41 and the space between the mounting bracket 41 and the steady rest member 4 are fixed by anchor bolts, ordinary bolts and nuts, not shown.

Each of the steady rests 4 is provided with one of the stacked unit tubular bodies 1 from the front side of the ring beam 30.
Of the staircase room 70
Stabilize the overall build state. This steady rest member 4
In the one side of the staircase 70, the construction state of the duct protection cylinder 90 made of reinforced concrete, which is juxtaposed by the same assembly method as the staircase 70, is commonly stabilized.

A duct (not shown) for ventilation from the upper part to the lower part is mounted in the duct protection tube 90. In FIG. 2, reference numeral 90a denotes a maintenance / management door provided below the duct protection cylinder 90.

Reference numeral 42 shown in FIG. 4 designates a fitting provided between the unit cylindrical body 1 and the steady rest member 4 on the other side of the unit cylindrical body 1 pressed from the front side. An unillustrated anchor bolt, ordinary bolts and nuts and the like are fixed between the tubular body 1 and the coupling fitting 42 and between the coupling fitting 42 and the steady rest member 4. Reference numeral 5 denotes a string-shaped adhesive member having an appropriate elasticity provided between the cutout surface 12 of the unit cylindrical body 1 and the inner surface of the ring beam 30, and is provided between the unit cylindrical body 1 and the ring beam 30. Provides cushioning and adhesion.

The above-mentioned steady rest member 4 has a low height of the staircase 70 and is integrally connected to the unit cylindrical body 1 on which the frame 50 of the screen room which is a part of the underground facility (sewer) is stacked. In such a case, the installation can be omitted.

Next, the steps 2 provided in the steps 70 will be described in detail with reference to FIGS.
The staircase 2 is an arbitrary number of unit staircase bodies 2 each having a predetermined length.
1, a landing plate 22 and a unit handrail 23 having substantially the same length as the unit staircase body 21;
3 is manufactured in a factory or a work place outside the shaft 10. Each of the unit staircase body 21 and the landing plate 22 is preferably made of reinforced concrete.
3 is preferably formed of stainless steel.

The landing board 22 has a plurality (50 in the figure).
Staircase 70 formed by stacking unit tubular bodies 1
On the other hand, it is fixed in a zigzag manner at the end in the width direction for each of the unit cylindrical bodies 1 of two or three stages. More specifically, a step 17 is provided in advance at the end of the upper surface of the unit cylindrical body 1 for fixing the landing plate 22,
After placing the landing board 22 there, it is fixed with bolts or the like (not shown). That is, the landing board 22 is mounted and fixed in such a manner that the landing board 22 is sandwiched between the two unit tubular bodies 1 and 1 which are vertically overlapped.

The upper and lower ends of each unit staircase body 21 are bolted to the mounting steps 22a, 22b of the landing plates 22, 22, which are vertically and staggeredly fixed at appropriate intervals.
It is fixed with female screw pieces, welding metal fittings and the like (all not shown), and the upper and lower landing plates 22 and 22 are fixed.
The non-shrinkable mortar is filled in the joint between the and the unit staircase body 21. Here, the plurality of unit staircase bodies 21 are mounted and fixed in a zigzag manner by being folded back at the landing plate 22 from the bottom of the shaft to the shaft opening.

Further, as clearly shown in FIG. 4, each unit stair body 2 fixed and mounted in the stair room 70 as described above.
1, since the outer side in the width direction is partitioned by the inner wall of the staircase 70 (unit cylindrical body 1).
The unit handrail 23 needs to be provided only on the central side of each unit staircase main body 21. The installation of the unit handrail 23
As shown in FIG. 13 (D-1), a plurality of mounting holes 21a are provided in advance on a side portion located at the center side of the unit staircase main body 21, and the unit handrail 23 corresponding to the unit handrail 23 inserted into each mounting hole 21a. This is performed by fixing the lower end of the column 23a with a wedge and filling the gap between the joints with the non-shrinkable mortar 9.

In FIG. 4, reference numeral 7 denotes a vibration damping material fixedly interposed between one side surface of the unit staircase main body 21 and the inner wall of the staircase room 70. It is provided so as to be isolated so as not to be transmitted to the inner wall of 70.

Next, with reference to FIG. 12 to FIG. 16, an operation procedure for constructing a method for constructing a staircase in a shaft according to the present invention,
That is, an example of a work process will be described.

(1) Unit cylindrical body installation process (FIG. 12)
(A)] A plurality of unit cylindrical bodies 1 manufactured at a factory or a work place outside the shaft by a crane 61 or the like are used to mount a base 80 provided at the bottom of the shaft.
It is hung one by one on top and piled up so that the hollow part is continuous. In the meantime, the landing plate 22 manufactured in a factory or a work place outside the shaft is similarly hung by the crane 61 or the like, and is assembled to the predetermined unit cylindrical body 1. However, the landing plate 22 can be assembled in advance on the predetermined unit tubular body 1 outside the shaft.

The lowermost unit cylindrical body 1 is fixed on a base 80 with a reinforcing bar or concrete cast in place. An insert fitting 1 is provided inside each unit tubular body 1 for various subsequent operations.
5 (see FIG. 6) as a clue to the inner scaffold 62 outside the shaft in advance.
It is good to put it temporarily.

(2) Step of Checking Installation Accuracy of Unit Cylindrical Body [Refer to FIGS. 12B and 14] During the above-described installation step, the unit cylindrical bodies 1 are properly stacked in the vertical and horizontal directions. Measure whether or not. For measurement in the vertical direction, for example, a laser beam irradiator 63 and a target 64 are used, and for measurement in the horizontal direction, for example, a level 65 and a box scale 66 or a level (not shown) are used.

If the stacked state of the unit cylindrical bodies 1 is not proper, as shown in FIGS. 15 and 16, the height of the unit cylindrical body 1 having a slanted top surface is made of steel. An adjusting plate 67 and a cold-setting epoxy resin liquid or other liquid synthetic resin 68 (hereinafter referred to as a liquid synthetic resin 68).
To correct the inclined plane to a horizontal plane. A solid rubber 69 is adhered to the periphery of the portion where the liquid synthetic resin 68 is applied to prevent the liquid synthetic resin 68 from flowing out, or a part of the solid rubber 69 is opened to inward the unit cylindrical body 1. May be allowed to flow out. The solid rubber 69 is adhered to the entire periphery near the outer wall surface on the upper surface of the unit cylindrical body 1 on the ground, and substantially the entire periphery near the inner wall surface (separated by several places for discharging the epoxy resin). It is bonded to a position that is not related to the joint portion 32. Then, epoxy resin is applied to a portion surrounded by the solid rubber 69, carried into a shaft, and assembled. Before the epoxy resin hardens, another box that has been subjected to the same process is assembled on the upper stage, and this operation is repeated.

With such a configuration, even if the next unit cylindrical body 1 is further superimposed on the unit cylindrical body 1 whose upper surface is corrected for inclination, the uncured liquid synthetic resin 68 remains in the unit cylindrical body 1 It is extremely advantageous in the present invention that one of the objects is to prevent the scaffold from being provided outside the unit cylindrical body 1 without flowing out to the outside. The reason is the staircase 70
If an external scaffold is not provided in the construction of the unit, the dirt due to the outflow of the liquid synthetic resin 68 to the outer surface of the unit cylindrical body 1 cannot be cleaned. This is because the liquid synthetic resin 68 does not flow out and become dirty.

(3) Coupling process between unit cylindrical bodies by means of joints (see FIG. 12 (C)) Preferably, each time a new unit cylindrical body 1 is suspended,
The upper and lower unit cylindrical bodies 1 and 1 are connected by the joint 3. Since the joint 3 used here is of a bolt fastening type,
The first joint portion 31 and the second joint portion 32 are fastened with bolts 33.

(4) Unit staircase main body installation process (FIG. 12)
(See (D)) The unit staircase main body 21 manufactured outside the shaft or in a work place by a crane 61 or the like is suspended in a plurality of unit cylindrical bodies 1 already installed in the shaft, and the unit cylindrical body 1 is suspended. To the two landing boards 22, 22 arranged and fixed in a staggered manner at the top and bottom.

(5) Step of attaching unit handrail [FIG.
(Refer to (A)) The unit handrail 23 manufactured in a factory or a work place outside the shaft is suspended by the crane 61 or the like, and the landing plates 22 and 2 are prepared in the preceding process.
2 and attached to the unit staircase main body 21 assembled.

(6) Step of attaching the steady rest member (FIG. 13)
(See (B).) The steady rest member 4 is hung down by a crane 61 or the like, both ends are fixed to one of the ring beams 30, and the stacked unit cylindrical bodies 1 are pressed toward the inner surface of the ring beam 30 from the front. (Only the cylindrical body that hits the ring beam).

After the above steps (1) to (6) are repeated for, for example, six lots, the process proceeds to the next step.

(7) Step of tightening bolts at joints (see FIG. 13 (C)) As the number of stacked unit cylindrical bodies 1 increases, the load received by the lower unit cylindrical body 1 becomes extremely large. As the joint 3 joins the lower unit cylindrical bodies 1 and 1 with the increase, the bolt 33 may be loosened. Therefore, the bolts 33 are retightened.

(8) Mortar filling step (FIG. 13D)
13] In the unit cylindrical body 1 shown in FIGS. 13 (D-2) and (D-3), the bolt mounting port 32b of the joint portion, the joint between the unit staircase body 21 and the landing plate 22, and the unit staircase body 21 The non-shrinkable mortar 9 is filled in the joint grooves 14 (see FIGS. 6 to 8) of the unit cylindrical body 1 in addition to the mounting holes 21a of the columns 23a of the unit handrails 23. Here, the construction of the staircase 70 as shown in FIGS. 1 to 3 is completed.

[0047]

According to the above-described staircase in the shaft and the method of constructing the same according to the present invention, the following effects can be obtained. Concerning the construction of a reinforced concrete staircase in a shaft, almost no installation and dismantling of concrete formwork, arranging of reinforcing bars, and placing of concrete at the site, and a large outside around the staircase Since the scaffold does not require temporary construction, a plurality of reinforced concrete unit tubular bodies manufactured in a factory or a work place outside the shaft are stacked in the shaft, and are connected with the joint provided in the unit tubular body. It is extremely effective in improving workability (construction workability), shortening the construction period, and reducing construction costs.

The required number of unit cylindrical bodies can be manufactured and placed in advance before the start of construction, and in that case, the construction period can be further shortened. A high quality thing can be constructed even if a decorative wall is not cast on the inner and outer surfaces of the staircase. If the unit cylindrical body is provided with a cutout surface along the curved inner surface of the ring beam on the outer surface of the trunk, the entire staircase can be constructed at a position sufficiently close to the ring beam, The effective use of the space inside the shaft can be achieved. In the case where the steady rest member is provided on the ring beam of the shaft, the strength of the entire staircase can be sufficiently increased.

[Brief description of the drawings]

FIG. 1 is a partial vertical sectional side view showing one embodiment of a staircase in a shaft of the present invention.

FIG. 2 is an enlarged partial longitudinal front view showing a lower half thereof.

FIG. 3 is an enlarged partial longitudinal front view showing the upper half thereof.

FIG. 4 is an enlarged cross-sectional plan view taken along the line IV-IV in FIG. 3;

FIG. 5 is an enlarged vertical sectional front view showing a part of the staircase.

6 is an enlarged view of a unit tubular body used in the staircase of FIG. 1, wherein (A) is a plan view, (B) is a longitudinal front view, and (C) is a side view.

FIG. 7 is an enlarged view of another unit cylindrical body.
(A) is a plan view, (B) is a longitudinal front view, and (C) is a side view.

8A and 8B are enlarged views of another unit cylindrical body, wherein FIG. 8A is a plan view and FIG. 8B is a longitudinal sectional front view.

FIG. 9 is an enlarged view of a landing board used in the staircase of FIG. 1, wherein (A) is a plan view and (B) is FIG.
(A) The transverse side view by the IX-IX line.

FIG. 10 is an enlarged view showing one of joints between two unit cylindrical bodies vertically adjacent to each other in FIG. 1, (A) is a front view,
FIG. 10B is a vertical cross-sectional front view, and FIG. 10C is a cross-sectional plan view taken along line XX of FIG.

FIG. 11 is a partial vertical sectional front view illustrating another joint that can be substituted for the joint of FIG. 10;

FIGS. 12A and 12B are explanatory views illustrating a first half operation process in the method of constructing a staircase in a shaft according to the present invention, wherein FIG. 12A shows an installation process of a unit tubular body, and FIG. (C) shows a joining step between unit cylindrical bodies by joints, and (D) shows an installation step of the unit staircase main body.

13 (A) and 13 (B) are explanatory views illustrating work steps in the latter half thereof, wherein (A) is a step of attaching a unit handrail, (B) is a step of attaching a steady rest member, and (C) is a bolt of a joint. (D) shows a mortar filling step, respectively.

14A and 14B are explanatory views illustrating a step of confirming the installation accuracy of the unit cylindrical body in the construction method of the present invention, wherein FIG. 14A illustrates a confirmation mode in a vertical direction, and FIG. 14B illustrates a confirmation mode in a horizontal direction. I have.

FIG. 15: Correction (adjustment) of improper installation of unit cylindrical body
It is the front view which illustrates the outline of the means which does and the enlarged sectional view of the principal part.

FIG. 16 is an enlarged plan view showing the correction (adjustment) means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vertical shaft 20 Continuous underground wall 30 Ring beam 30a Curved inner surface 40 Underground facility 50 Screen room frame 60 Grating 70 Staircase room 80 Base 90 Duct protection tube 90a Door 1 Unit cylindrical body 11 Thick portion 12 Notched surface 13 Window 14 eyes Ground groove 15 Insert fitting 16 Opening 17 Step 18 Door 2 Stairs 21 Unit stair body 21a Mounting hole 22 Landing board 22a Mounting step 22b Mounting step 23 Unit handrail 23a Prop 3 Joint 31 First joint (female screw member) 31a anchor bar 32 second joint unit 32a bolt insertion hole 32b bolt mounting port 32c anchor bar 33 bolt 34 washer 35 first joint unit (pin) 35a anchor bar 36 second joint unit (engaging assembly) 36a receiving hole 36b substrate 36c Cap 36d Claw piece 36e Check spring plate 36 Anchor bar 4 Anti-sway member 41 Mounting bracket 42 Bonding bracket 5 Adhesive member 61 Crane 62 Internal scaffold 63 Laser beam irradiator 64 Target 65 Level 66 Box length 67 Height adjusting plate 68 Liquid synthetic resin 69 Solid rubber 7 Damping material 9 No shrinkage mortar

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Ryuichi Tatebe 1-1-1 Tomicho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Inside Kumagaya-gumi Yokohama Branch (72) Inventor Kazushige Matsuda 1-Tomicho, Kanagawa-ku, Yokohama-shi, Kanagawa 1 Inside the Kumagaya Gumi Yokohama Branch (72) Inventor Hiroyasu Kitayama 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Tokyo Main Office (72) Inventor Yoshinori Takamatsu 4-2-2 Shiba, Minato-ku, Tokyo Geostar Co., Ltd. (72) Inventor Noriko Hoshina 4-2-2 Shiba, Minato-ku, Tokyo Geostar Co., Ltd.

Claims (6)

[Claims] 1. A staircase provided in a depth direction in a shaft and in which an internal space is assembled with a staircase body and a landing manufactured in a factory or a work place outside the shaft, and in a factory or a work place outside the shaft. A plurality of concrete unit cylindrical bodies having substantially the same cross-sectional shape and having a plurality of first joint portions and a plurality of second joint portions on an upper end surface portion and a lower end surface portion, respectively, are provided at the bottom of the shaft. The two unit cylindrical bodies which are stacked so that the hollow portions are continuous on top and are vertically overlapped are connected by the first joint part of the lower unit cylindrical body and the second joint part of the upper unit cylindrical body. A staircase in a shaft. 2. The unit cylindrical body has a rectangular cross-sectional outer shape,
At least a part of the outer surface of the body of the unit cylindrical body corresponding to the ring beam in the shaft has a cutout surface along the curved inner surface of the ring beam, and the unit cylindrical body has the cutout surface of the ring beam. 2. The staircase in a shaft according to claim 1, wherein the staircase is configured to abut on a curved inner surface. 3. The staircase is composed of a staircase body, a landing, and a handrail, and each of the staircase body, the landing, and the handrail are manufactured as a unit staircase body, a landing board, and a unit handrail at a factory or a work place outside the shaft. 3. A staircase in a shaft according to claim 1, wherein an arbitrary number of unit staircase bodies, landing boards and unit handrails are assembled inside a plurality of unit cylindrical bodies stacked in the shaft. 4. A plurality of unit cylindrical bodies stacked and fixed so as to be in contact with the inner surface of a ring beam in a shaft, and both ends of the unit cylindrical body are bridged over the ring beam, and the ring beam and / or
4. The staircase in a shaft according to claim 1, wherein the stabilization member is pressed against a continuous underground wall by a steady rest member. 5. The staircase in a shaft according to claim 3, wherein both the unit staircase main body and the landing plate are made of reinforced concrete. 6. A method for constructing a stair room provided in a depth direction in a shaft and to which a stair body and a landing manufactured in a factory or a work place outside the shaft in an internal space are assembled. Alternatively, a plurality of unit tubular bodies made of reinforced concrete having substantially the same cross-sectional shape having a plurality of first joint portions and a plurality of second joint portions on the upper end face portion and the lower end face portion, respectively, are manufactured from the outside of the shaft. The two unit cylinders, which are sequentially suspended and stacked on a base provided at the bottom of the shaft so that the hollow portions are continuous, are vertically overlapped, and the first joint portion of the lower unit cylinder and the upper unit cylinder A method of constructing a staircase in a shaft, wherein the staircases are connected by a second joint portion of the shape.