JPH06240992A - Manufacture of concrete segment with taper - Google Patents

Abstract

PURPOSE:To obviate such a form as being high in manufacturing accuracy at each individual segment in time of manufacturing this concrete segment forming each curve part in a tunnel. CONSTITUTION:In this manufacture, there is provided a ringlike void which places such concrete as being tapered so as to make its width gradually diminish toward the other end in the radial direction from one end in the case of being assembled annularly, and specified numbers of partition plates 3, 3' are set up in a ring type form equipped with an inner circumferential wall 6, an outer circumferential wall 7 and a bottom wall 5 so as to have the ringlike void divided into even sections, and this ring type form is tilted so as to the top face become horizontality. Next, concrete is placed every one section of these even sections and unplaced sections 2 are left behind at every one section. In succession, after the concrete is hardened, the partition plates 3, 3' are removed. Subsequently, the end face where these partition plates 3, 3' are removed is used as the unplaced sections 2 and concrete is further placed in the unplaced section 2, and after the concrete is hardened, it separates to a concrete segment block at every section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a taper forming a curved portion of a tunnel and having a taper so that the width gradually decreases from one end to the other end in the radial direction when assembled in a ring shape. The present invention relates to a method of manufacturing a concrete segment with a par.

[0002]

2. Description of the Related Art Generally, a conventional taper-equipped concrete segment has a reinforcing bar and an embedded member such as a joint metal fitting in a hard steel mold for one segment. They are arranged and concrete is poured to manufacture. However, this method requires that the concrete surfaces of the segments made by different formwork that contact each other between segments (including between segment rings) should be as flat and intimate as possible. The production precision had to be significantly increased. Therefore, the price of the formwork is naturally high. Furthermore, in mass-producing segments, it is necessary to prepare many such molds. Due to such circumstances, the segment price was inevitably high.

[0003]

The present invention is intended to solve the above problems, and the gist thereof is as set forth in the appended claims.

The present invention is a method of directly placing concrete between the segments or between the segment rings on the concrete surfaces of the other segments, which contact the concrete surfaces on the four sides of the segment. The present invention provides a method for producing a concrete segment with a taper, which does not require the use of a large number of molds which is expensive as in the past. When pouring concrete into a ring formwork having an inner peripheral wall, an outer peripheral wall and a bottom wall, the ring formwork is inclined so that its upper surface is horizontal.

Needless to say, the same manufacturing method can be applied to the case where the embedded member is embedded.

In the present invention, after the cast concrete is hardened, it is separated into the taper-equipped concrete segments for each section. To facilitate this, for example, the peeling normally used when pouring concrete is carried out. It is enough to use the agent.

In the present invention, the burying member is a reinforced member such as a reinforcing bar, a positioning member such as a dowel, a burying member such as a joint fitting member.

The taper according to the first to fifth aspects of the invention
Although the concrete segment with a taper can be efficiently mass-produced, according to the invention of claim 6, the concrete segment with a taper can be continuously manufactured more efficiently.

According to the invention of claim 7, the advantages of the present invention can be more effectively enjoyed. That is, the greatest advantage of the present invention is that the concrete of another segment, which will be in contact with the concrete surface of the four sides of the segment, is directly placed on the surface, so that the contact surfaces of the four sides of the segment can be easily combined with each other. Consistency can be realized, but by embedding the alignment member in the segment, it is possible to easily use the alignment member at the same position as that at the time of manufacturing when the segment manufactured by the present invention is assembled and constructed. This is because they can be matched and the precise matching at the time of manufacturing can be accurately reproduced.

The invention according to claim 8 is characterized in that the partition plates are arranged with a predetermined inclination.
The method for producing a concrete segment with a taper according to any one of 1. By this manufacturing method, the joint surface of the segment can be angled. In particular, it is preferable that the surface of the segment joint surface in the tunnel axis direction is not parallel to the tunnel axis direction as in a normal segment but is formed at a slight angle with respect to the tunnel axis direction. With this, a remarkable effect as described in the following examples is also exhibited.

The invention according to claim 9 is characterized in that the partition plate is a partition plate having a stepwise bent portion, and the production of a taper-equipped concrete segment according to any one of claims 1 to 8. Is the way. By this manufacturing method, a step can be formed on the joint surface of the segment. In particular, it is recommended that the segment joint surface is not one flat surface like an ordinary segment, but two parallel surfaces having a very small step near the center in the thickness direction of the joint surface. As a result, a remarkable effect as described in Examples described later is also achieved.

The present invention utilizes a so-called match casting method. However, even if the ring joint surface of the segment is manufactured without match casting, the ring joint surface of the already assembled segment is completed. On, a thin mat impregnated with a resin, the curing time of which is adjusted appropriately, is attached, and if the segments of the next lot are assembled, the resin is cured after assembly to make the ring joint surface not match-cast watertight, and , Compressive stress can be smoothly transmitted without causing point contact on the joint surface. As a result, it is possible to obtain joints that exhibit a sufficient compressive strength even when receiving a strong reaction force of the shield jack.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a diagram showing a mold bottom wall 5, an inner peripheral wall 6 and an outer peripheral wall 7 of a circular mold according to an embodiment of the present invention. As shown in FIG. 1, the inner peripheral wall 6 and the outer peripheral wall 7 have one end (the portion having the maximum width of the inner peripheral wall 6 and the outer peripheral wall 7) to the other end in the radial direction (the minimum width of the inner peripheral wall 6 and the outer peripheral wall 7). The taper is attached so that the width of the tape gradually decreases toward the portion having the. FIG. 3 illustrates only the tapered concrete segment ring composed of the tapered concrete segment block manufactured according to this embodiment. For the taper, see, for example, FIG.
R = 80m, which is close to the minimum radius of the shield tunnel shown in 2.
In the case of the taper-equipped concrete segment ring, the following is done. Note that FIG. 12 is not drawn to an accurate scale in order to make the taper amount Δl easy to visually recognize.

[0014]

[Equation 1]

Next, the manufacturing process of the taper-equipped concrete segment will be described. First, an inner peripheral wall 6 and an outer peripheral wall 7 of a circular formwork for taper-equipped concrete segment rings are assembled on a formwork bottom wall 5, and partition plates 3 and 3'are attached to each taper-equipped segment section 1 After installing the rebar, joint fittings, dowels, etc., the bottom wall 5, the inner peripheral wall 6 and the outer peripheral wall 7 (ring frame) are inclined so that the surfaces including their upper ends are horizontal. Of course, the bottom wall etc. 5,
Reinforcing bars and the like may be arranged after inclining 6 and 7. Bottom wall etc. 5,
The tilting of 6 and 7 is performed by extending and retracting a support jack (not shown) that supports them.
Next, the concrete of the segment section 1 with the taper is poured, and the ring joints, that is, the upper surfaces 4 and 14 to be joints in the tunnel axial direction are carefully finished. The taper at this time
No concrete is placed in the attached segment section 2.

Then, after some time has passed, the partition plate 3,
When the concrete is hardened to the extent that it does not hinder the concrete surface even if 3'is removed, the partition plates 3 and 3'are removed, and the taper-equipped segment 11 on the side of the taper-equipped segment 11 that has been set and hardened A peeling agent is also applied to the joint surface, that is, the concrete surface 13 to be a joint in the direction perpendicular to the tunnel axis, and the concrete in the segment section 2 with the taper is applied to the concrete side surface 13 in the segment 11 with the taper.
Is directly placed as a side wall and the upper surface 14 is carefully finished, and the tape is attached.
Complete a pared concrete segment ring (I).

FIG. 2 is a view showing another embodiment of the present invention in the same manner, and shows only a concrete segment ring with taper which is made of a concrete segment block with taper manufactured by this embodiment. Figure 4
Is. In the present embodiment, a peeling agent is applied to the concrete finishing surface 14 which is the ring joint surface of the upper surface of the concrete segment ring with taper (I) of the foundation stage formed by the above-mentioned steps, and the tape is removed. A concrete segment ring (II) with taper was completed in the same manner as the concrete segment ring (I) with taper. When pouring concrete, the form and taper of the concrete segment ring (II) with taper (II) so that the upper surface of the form (not shown in FIGS. 2 and 4) is horizontal. -Incline the attached concrete segment ring (I) (or formwork if not demolded). Thereafter, the taper-attached concrete segment rings (III) and (IV) are similarly stacked and completed.

Further, in order to stack the taper-equipped concrete segment rings on the upper side, the following procedure is carried out.

After forming the tapered segment segment with taper (I) (II) (III) (IV), 2
The load of the taper-equipped concrete segment rings (II) (III) (IV) above the step is temporarily supported by the support jacks, and only the taper-equipped concrete segment ring (I) of the lowermost stage is supported. FIG. 15 is a diagram showing a state where the lower part is separated from the ring joint surface 14 by being lowered a little like 15, and is removed. Then, as shown in FIG. 6, each taper-attached segment of the removed taper-attached concrete segment ring (I) is pushed out to the outside of the taper-attached concrete segment ring by 16 to individually It is separated into the segment block with the taper. When the taper-equipped segments are separated and put away as shown in FIG. 6, the taper-equipped concrete segment ring (II) and above are reduced by one ring width as in 17. This step will be described more specifically with reference to FIG. Concrete segment rings (I) (II) (III) with respective tapers shown in FIG.
(IV) has the same dimensions as the taper-equipped concrete segment ring shown in FIG. 12, and the respective dimensions are shown below.

D ₀ = 6500 mm R = 80000 mm θ ₁ = 0.6197 ° θ ₄ = 2.4788 ° D = D ₀ cos θ ₄ = 6500 × 0.9991 = 649
4 mm h = D ₀ sin θ ₄ = 6500 × 0.0432 = 28
0.8 mm δD = D−D ₀ = 6500-6494 = −6 mm χ ₍₂₎ −χ ₍₁₎ = 32 mm χ ₍₂₎ '− χ ₍₁₎ ' = 33
mm χ _{(3) −} χ ₍₁₎ = 54 mm χ ₍₃₎ '− χ ₍₁₎ ' = 58
mm χ _{(4) −} χ ₍₁₎ = 68 mm χ ₍₄₎ '− χ ₍₁₎ ' = 67
mm χ _{(5) −} χ ₍₁₎ = 72 mm χ ₍₅₎ '− χ ₍₁₎ ' = 75
mm Therefore, when stacked up to 4 steps, the upper surface of the fourth-stage concrete segment with taper (IV), which is the uppermost step, and the lowermost step, the first-stage concrete segment ring with taper (I) The horizontal distance (χ ₍₅₎ −χ ₍₁₎ ) inside the curve on the lower surface of) is 72 mm.

In order to manufacture the fifth-stage taper-equipped concrete segment ring (not shown in FIG. 13), the taper-equipped concrete segment ring (I) at the lowermost stage was disassembled (this embodiment). In the example, the maximum number of stages is 4 in consideration of the proof strength of the molds 6 and 7.) The taper of the second stage
When the supporting concrete supporting the supporting concrete segment ring (II) is retracted and lowered vertically, the inside of the curved concrete segment ring (II) with the taper is newly positioned at the lowermost stage. Horizontal distance δ between the lower surface ((2) in FIG. 13) and the curved lower surface ((1) in FIG. 13) of the tapered concrete segment ring (I) located at the lowermost stage.
χ _L is δ χ _L = χ ₍₂₎ −χ ₍₁₎ = 32 mm from the above dimensions.

Further, the horizontal distance between the curved inner lower surface ((5) in FIG. 13) of the taper-equipped concrete segment ring of the fifth step, which is newly located at the uppermost step, and the above (1). δχ _U is δχ _U = (χ _{(5) −} χ ₍₁₎ ) ＋ (χ _{(2) −} χ ₍₁₎ ) = 7
It becomes 2 + 32 = 104 mm.

As described above, when the taper-equipped concrete segment ring located in the lowermost stage is removed and the taper-equipped concrete segment ring located in the other stage is lowered, δχ _L and δχ _U are initially 3 Concrete segment ring with taper (I
II) is at the bottom, δχ _L = 64 mm, δ
χ _U = 136 mm, δχ _L = 96 mm, δχ _U = 168 m when the taper-equipped concrete segment ring (IV), which was initially located at the fourth stage, is located at the bottom stage.
m, δχ _L = 1 when the 5th-stage tapered segmented concrete segment ring from the beginning is located at the bottom stage
28 mm, δχ _U = 200 mm, and when the concrete segment ring with taper at the nth stage from the beginning is located at the lowest stage, δχ _L = χ _(n) −χ ₍₁₎ = 32 · (n−1 ) (Mm), δχ _U = (χ _{(n + 4)} -χ ₍₁₎ ) + (χ _(n) -χ ₍₁₎ ) = 72 + δχ _L (mm).

When the production of the taper-equipped concrete segment ring proceeds as described above, the taper-equipped concrete segment ring moves to the outside of the curve. The center (tapered concrete segment ring) of the thickness (t = 300 mm) of the portion having the minimum width and the maximum width ((1) and (1) ′ in FIG. 13) of the tapered segment segment with taper. 150 from the outer edge of
If a support jack is installed in the (mm part),
When the taper-equipped concrete segment ring (IV) located at the stage is located at the lowermost stage, both support jacks move 96 mm in the radial direction. Therefore, since the taper-attached concrete segment ring is supported eccentrically (in (1) of FIG. 13, a portion 54 mm from the outer edge of the taper-attached concrete segment ring is shown in (1) ′). Will be supported by the support jack at a portion 54 mm from the inner edge), and it will be difficult to carry out further continuous work.

Therefore, the following measures are required for continuous operation.

When the taper-equipped concrete segment ring (IV) located at the fourth stage is first disassembled, the other taper-equipped concrete segment rings are moved 96 mm inward of the curve. It will return to the center position of the thickness of the tapered segment segment with taper. At that time, if it is further moved by 96 mm, that is, 192 mm, the work up to 8 steps can be continuously performed thereafter, and efficient production can be performed. In order to move the taper-equipped concrete segment ring, for example, a simple jack equipped with a flat jack can be attached to the lower surface of the taper-attached concrete segment ring by adjusting the loading height. Moving devices, etc.
What is suitable for carrying out the present invention may be used.

After moving the taper-equipped concrete segment ring to the above position, the tape is replaced with the support jack again. When moving the concrete segment ring with taper, the hook for attaching the support jack is used.
Tighten the taper-equipped concrete segment ring located at the bottom with a band.

By the above steps, the taper-equipped concrete segment ring can be continuously manufactured.

FIGS. 7 (a) and 7 (b) show the arrangement of the dowels and the like attached at the time of manufacturing the taper-equipped concrete segment ring.
On the other hand, the female 18 and the male 19 of the dobel are combined to form the dobel 20, and the ring joint surfaces 14 facing each other are aligned in the correct position. For the segment joint surface 13 with the taper, an alignment jig formed by combining the steel plate 21 and the wedge 22 at the time of manufacturing the segment with the taper is used. To the correct position.

FIG. 8 shows a dowel for the ring joint surface 14, and FIG. 9 shows an alignment jig for the taper-equipped segment joint surface 13.

FIGS. 10 (a), 10 (b), 10 (c) and 10 (d) show the shape of the taper-equipped segment manufactured according to one embodiment of the present invention. This shows the advantage of having such a shape.

As shown in FIG. 10A, after assembling the taper-equipped segment 11, the taper-equipped segment 1 is assembled.
When assembling 2, the method of aligning the surface 13 with the position at the time of manufacturing was described using the positioning jig as shown in FIGS. 7A and 7B, but here the surface 13 is extremely close. Manufactured so that it is composed of two parallel surfaces provided with a slight step 25, and is provided with a taper from the inside of the tunnel to the outside like 17 when the segment 12 with the taper is assembled in the tunnel. When extruding the segment 12 along the surface 1 З, the taper-equipped segment 12 at the step 25 is tapered.
In the vicinity of the position when manufacturing with the attached segment 11,
It is possible to easily adjust the position in the direction perpendicular to the shield axis without using a positioning jig as shown in FIGS. 7 (a) and 7 (b).

FIG. 10 (b) is a development view of the concrete segment ring with the taper. The angle 24 is set to an extremely small angle with respect to the axial line of the tunnel. However, as shown in FIG. If the surface 13 is parallel to the shield axis direction, the surface 1 will be smooth due to mutual friction between the concrete surfaces and slight unevenness.
Since there is a risk that it will not be possible to align 4 with each other, in order to avoid this, the insertion of the dowel is completed and the surface 14 is aligned, and at the same time, the surface 1 is aligned, and the step 25 is also aligned,
All of the assembly of the tapered segment 12 can be carried out smoothly.

FIG. 10 (c) is an enlarged view of the tapered segment joint surface 13 in detail. Figure 10
Reference numeral 26 in (a) and (b) is a segment with a key taper, and the angle 24 with the shield axial direction is another taper.
The same as the segment with.

FIG. 11 shows a joint filler which secures watertightness of the joint surface, smoothly transmits compressive stress, and exerts sufficient compressive strength when the ring joint 14 'is not match cast. 29 shows the concept of a ring joint formed by arranging 29. Reference numeral 30 denotes a taper-equipped segment which has been assembled, and 31 denotes a taper-equipped segment which is not matte cast yet to be assembled.
By using such a joint material, it is possible to easily cope with the case where the taper ring before and after the taper ring or the taper concrete segment ring which is not continuously manufactured in the same form must be assembled. .

In this embodiment, the taper at the bottom is
After removing the attached concrete segment ring,
Separated into individual segmented blocks with taper,
The scope of the present invention is not limited to this, and in the present invention, it is also possible to separate and remove individual taper-equipped segment blocks.

Further, in this embodiment, the taper-equipped concrete segment ring is inclined by extending and retracting the support jack. However, in the present invention, the lifting device and the like are used. Any suitable one can be used for carrying out.

Further, in this embodiment, the support jacks are installed at the portions shown in (1) and (1) 'in FIG. 13, but the lower surface of the concrete segment ring with taper is inclined in the direction of inclination. The position of the support jack can also be determined so that the length can be made large. In such a case, mechanical stability can be achieved as compared with the above embodiment.

Further, a large number of support jacks are required to support the taper-equipped concrete segment ring using the support jacks, but the control surface of the support jacks is always in the same plane. Can also be used.

Further, although the present embodiment has a circular cross-section, a cocoon-shaped, spectacle-shaped, box-shaped and other concrete segment with a taper is manufactured by changing the shape of the mold. can do.

Further, in the present embodiment, although the taper-equipped concrete segment having the same curvature is used, it is possible to manufacture a concrete segment having a different curvature. The production of such a taper-equipped concrete segment may be carried out as follows.

First, the minimum width of the taper-equipped concrete segment is determined to form the basic ring formwork.

Next, a liner plate for a concrete segment ring with a taper is manufactured so as to have a desired taper, and the liner plate is attached so as to be integrated with a basic ring. If such a basic ring and required liner plates are prepared, they can be attached to produce the required tapered concrete segment. In such a case, whether the liner plate is on both sides or one side is determined by considering the amount of taper and the like.

[0044]

As described above, according to the present invention, it is not necessary to use a formwork having high manufacturing accuracy for each taper-equipped segment in order to manufacture the taper-equipped concrete segment. Moreover, since it is not necessary to prepare a large number of such delicate molds, the industrial, technical, or practical effect thereof is extremely large. Further, according to the present invention, an elaborate taper-equipped concrete segment can be mass-produced quickly and easily, and its effect is immeasurable.

Further, since the ring formwork is inclined so that the upper surface thereof is horizontal, concrete can be poured into the ring formwork located at the uppermost stage during the production of the taper-equipped concrete segment. .

Further, according to the present invention, the taper occupies a large weight in the shield tunnel construction cost.
It can be said that the usefulness of the present invention in industry is extremely large, because it greatly contributes to the reduction of the price of the attached segment.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing another embodiment of the present invention.

FIG. 3 is a schematic view showing a concrete segment ring (I) with a taper, which comprises a concrete segment block with a taper formed according to the embodiment of FIG.

FIG. 4 is a schematic view showing a state in which a taper-equipped concrete segment ring composed of a taper-equipped concrete segment block formed according to another embodiment is formed in multiple stages.

FIG. 5 is a view showing a state in which the lowermost concrete segment ring with taper is released and removed.

FIG. 6 is a view showing a method of separating a tapered segment segment ring composed of a tapered segment segment block into individual tapered segments.

FIG. 7 (a) is a ring joint surface of a taper-attached concrete segment, and FIG. 7 (b) is a dowel and an alignment jig for correctly aligning the taper-attached segment joint surface with the opposing surfaces during manufacturing. Figure showing the arrangement status of

[Figure 8] Enlarged view of Dobel

FIG. 9 is an enlarged view of a positioning jig.

FIG. 10 (a) is a segment joint surface 13 with a taper.
(B) is a development view of the taper-equipped concrete segment ring, and (b) is the angle 24 with the shield axial direction line of the surface 13, and (c) is the surface 13 of the taper-equipped segment. FIG. 3D is a view for explaining the advantage of forming a stepped state on the surface of the surface 13 at an angle 24 by slightly inclining the surface 13 with respect to the tunnel axis direction line.

FIG. 11 is a diagram showing a state in which a joint filler is used when the ring joint surface is not match cast.

FIG. 12 is a plan view of a concrete segment ring with a taper.

FIG. 13 is a front view of a concrete segment with a taper which is vertically stacked and manufactured.

[Simple explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Segment division with a taper for placing concrete first 2 ... Segment division with a taper for placing concrete later 3, 3 '... Partition plate 4 ... Concrete upper surface when cast 5 ... Mold Frame bottom wall 6 ... Formwork inner peripheral wall 7 ... Formwork outer peripheral wall 11 ... Tapered segment with a concrete cast first 12 ... Tapered segment with a concrete cast 13 ... Taper -Segment joint surface 14 ... Ring joint surface 14 '... Ring joint surface that is not cast-matched 15 ... Slight drop of concrete segment ring with bottom taper 16 ... Concrete segment ring with taper individually Extrusion to the outside of the ring for separating into taper segments 17 ... Concrete segment ring with taper (I
I) Descent of only one ring width above 18… Diebel female 19… Diebel male 20… Diebel 21… Alignment jig steel plate 22… Alignment jig wedge 23… Alignment jig anchor bar 24… Angle between segment joint surface with taper and tunnel axial direction 25 ... Slightly stepped portion in taper segment joint surface 26 ... Key taper segment 27 ... Taper Movement in the direction perpendicular to the tunnel axis at the time of segment assembly 28 ... Movement in the tunnel axis direction at the time of segment assembly with a taper 29 ... Joint filler used for the ring joint surface that is not matchcast 30 ... Assembly completed Segment with tape 31 ... Segment with tape that is not casted and is assembled from now on (I) -... Concrete segment with taper for the first stage TRING (II) ... Concrete segment ring with taper of the second stage (III) ... Concrete segment ring with taper of the third stage (IV) ... Concrete with taper of the fourth stage Segment ring

Claims (9)

[Claims] 1. A method of manufacturing a concrete segment with a taper for forming a curved portion of a tunnel, wherein the taper has a width that gradually decreases from one end to the other end in the radial direction when assembled in a ring shape. To divide the ring-shaped void into an even number of sections in the circumferential direction in a ring form having a perimeter, an outer peripheral wall and a bottom wall forming a ring-shaped void for placing concrete. A predetermined number of partition plates are arranged at predetermined positions, the ring formwork is tilted so that the upper surface thereof is horizontal, and then concrete is placed every other section of the even number section to place one section. To leave the uncast section, then finish the cast concrete top surface, remove the partition plate after the concrete has hardened,
Then, the end surface from which the partition plate of the hardened concrete has been removed is used as a side wall of the uncast section to cast concrete into the uncast section, and the cast concrete top surface is finished,
After the concrete is hardened, it is separated into concrete segment blocks for each section.
For manufacturing a concrete segment with an arrow. 2. The production of a taper-equipped concrete segment according to claim 1, wherein when the concrete is poured into each of the sections, the embedding member is arranged in the section and then the concrete is placed. Method. 3. An inner peripheral wall and an outer periphery, each of which is provided with a taper so that the width gradually decreases from one end to the other end in the radial direction when assembled in a ring shape, and forms a ring-shaped void for placing concrete. In a ring form having a wall and a bottom wall, a predetermined number of partition plates are arranged at predetermined positions so as to divide the ring-shaped void into an even number of sections in the circumferential direction, and the upper surface of the ring form is horizontal. So as to be inclined together with the bottom wall, and then the embedded member is placed in every one of the even numbered sections to pour concrete, leaving the unplotted section in every other section, and then piling. Finishing the concrete top surface, removing the partition plate after the concrete has hardened, and then using the end surface from which the hardened concrete partition plate has been removed as the side wall of the uncast section to place the embedded member in the uncast section. Concrete A step of casting, finishing the cast concrete upper surface, and hardening the concrete, and on the foundation step ring consisting of the concrete segment blocks of all sections formed by the above-mentioned step, A ring-shaped space for placing concrete on the upper stage by providing a ring-shaped flat surface having a continuous upper surface as a bottom wall, and providing an inner peripheral wall rising in contact with the inner peripheral edge of the ring-shaped bottom wall and an outer peripheral wall rising in contact with the outer peripheral edge of the ring-shaped bottom wall Forming a ring formwork, sloping the ring formwork so that the upper surface thereof is horizontal, and forming an upper ring composed of concrete segment blocks in the tilted ring formwork by the same process as described above. Steps, and if necessary, the same steps as the above steps, one ring after another on the upper ring one by one. And a step of forming a predetermined number of upper-stage rings composed of concrete segment blocks as a group, and a step of separating a ring composed of a plurality of stages of concrete segment blocks formed by the above steps into respective concrete segment blocks. And a method for producing a concrete segment with a taper. 4. The ring of the lowermost stage is formed by forming a ring composed of a predetermined number of stages of concrete segment blocks according to the process of claim 3 and then temporarily supporting the load of the second or more stages of the ring at any time. Is removed, and the removed ring is separated into each concrete segment block. A method for producing a concrete segment with a taper. 5. The method of manufacturing a concrete segment with taper according to claim 3, wherein after forming a ring composed of a predetermined number of stages of concrete segment blocks, the load of the second or more stages of the ring is temporarily supported at any time. A method for producing a concrete segment with a taper, characterized in that the step of removing the lowermost ring and then lowering the ring of the second step and above is performed a predetermined number of times. 6. The method for manufacturing a concrete segment with taper according to claim 4 or 5, wherein the lowermost ring is removed while temporarily supporting the load of the ring of the second step or more, and then the second step or more. Step of lowering the ring of the above, and further as a base stage ring on the top stage ring
A method for continuously producing a concrete segment with a taper, characterized in that the step of forming a ring composed of a stepped concrete segment block is alternately repeated. 7. The embedding member is a dowel or other alignment jig member for aligning the joint surface of the concrete segment at the same position as at the time of manufacturing. A method for manufacturing a concrete segment with a taper. 8. The method for producing a concrete concrete segment with taper according to claim 1, wherein the partition plates are arranged with a predetermined inclination. 9. The method for manufacturing a concrete segment with a taper according to claim 1, wherein the partition plate is a partition plate having a stepwise bent portion.