JP2000179296A - Manufacture of mold for segment joint part and form for segment joint part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a mold for a joint part and a form for a segment joint part, which can reduce the manufacturing cost of a segment form by manufacturing the segment joint form by concrete and by which a gap between joint parts of manufactured segment molded articles can be hardly formed. SOLUTION: According to this manufacturing method for a form for a segment joint part forming a joint part of a segment, a base having a form end plate part formed corresponding to the joint part of a formed segment is installed, and concrete is placed along the form end plate parts T1, T2 inside the form end plate parts T1, T2 of the master molds ML, MR of the base to form segment joint part molds AL, AR. Secondly, the segment joint part molds AL, AR are removed from the master molds ML, MR, and fixed at a space to both ends of the segment manufacturing molds AF1, BF1, CF1 to manufacture forms AF, BF, CF of each wing segment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment joint portion mold for forming a segment joint portion used in a shield method and a method of manufacturing the segment joint portion mold.

[0002]

2. Description of the Related Art A formwork for forming a concrete segment formed of an arc plate used in a primary lining of a tunnel is generally made of steel. As is well known, segments are formed by flowing concrete into a steel form having a predetermined shape and solidifying the concrete.

[0003] In a segment in which segments are connected in the circumferential direction to form a segment ring, the shape of the joint portion of the segment has recently been various. For example, a step is provided in the segment joint portion in the circumferential direction. There is a shape in which a protrusion is formed in a direction intersecting the circumferential direction, and is called a wing segment.
The segment ring shown in FIG. 20 is configured by using a plurality of pieces of wing segments (a), (b), and (c) having three different shapes.

[0004] Such wing segments (a),
Of (b) and (c), the one with a symmetrical segment joint is a symmetrical wing segment (a), and the one with a left and right asymmetrical joint shape is an asymmetrical wing segment (b). ), And these two asymmetrical wing segments (b) and (c) are joined to each other at two circumferential ends of the wing segment (a). Wing segments (a), (b), and wing segments constituting a segment ring as shown in FIG.
(C) is formed by a dedicated mold, respectively, and each mold is individually manufactured by NC processing.

[0005]

By the way, the joint portion of the wing segment is bent at two locations to form a step, and the joint surfaces of different heights formed by the step have Each may have a shear key, the processing of the segment joint increases,
It has a more complicated configuration. For this reason, in the above-mentioned conventional method of manufacturing a dedicated mold for molding the symmetrical wing segment (a), the asymmetrical wing segment (b), and (c), respectively, each mold for manufacturing the segment of each form is used. For each frame, a complicated and high-precision mold for the joint portion is individually manufactured, which is troublesome. In addition, in the production of the formwork, particularly in the production of a formwork of a joint having a complicated structure, it is necessary to perform NC processing to produce each formwork.

In addition, since the molds for forming the above-described complicated joints are manufactured independently of each other, when the wing segments respectively formed using these molds are assembled, they are adjacent to each other. There is a possibility that a slight error occurs in the dimensions of the joint portions of the wing segments to be joined together, and that the entire joint portions do not coincide with each other and that a gap is partially formed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reduce the manufacturing cost of a segment mold by manufacturing a mold for forming a segment using concrete or the like. It is another object of the present invention to provide a method for manufacturing a mold for a joint portion and a mold for a segment joint portion in which a gap between joint portions of the manufactured segment molded products is difficult to be formed.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the invention according to claim 1 is directed to a segment joint portion of a segment joint portion formwork for forming a segment joint portion of a segment used for lining a shield tunnel. A first step of installing a master mold having a mold end plate formed corresponding to a joint of a segment to be molded, and a mold end plate of the master mold. A second step of flowing a fluid which solidifies over time along the form end plate portion to form a segment joint portion mold, and removing the segment joint portion mold from the master mold. And a third step of demolding.

[0009] The mold end plate portion of the master mold (mother mold) is accurately manufactured by NC processing or the like corresponding to a joint portion of a segment to be molded. The form end plate portion of the master mold may be made of steel. Further, the form end plate portion may have any shape as long as it is formed corresponding to the joint portion of the segment to be formed. For example, in the case where the joint surface of the segment to be manufactured has a shape in which a step is formed in the axial direction of the segment, a shape corresponding to this is exemplified. If the joint surface is configured such that a step is formed, when the segment molded products having steps are manufactured using the segment joint part mold manufactured in this manner, these joints are joined. A gap in the portion is less likely to occur.

Further, the fluid that solidifies with the passage of time may be any fluid as long as it solidifies with the passage of time, such as a resin or concrete that solidifies later. Further, when the fluid is solidified, a reinforcing bar for the fluid may be provided in a portion where the fluid flows. By fixing the mold for the segment joint portion formed as described above to the end of the segment production mold which is an arc-shaped bottom plate portion for molding the inner surface of the segment to be a product, the segment joint portion is formed. Formwork can be manufactured.

According to the method for manufacturing a segment joint part mold of the present invention, the segment joint part mold is formed by a master mold having a mold end plate formed corresponding to a joint part of a segment to be formed. Is manufactured, a plurality of segment joint portion dies having the same shape can be manufactured by this master mold. Therefore, since this segment joint portion mold can be attached to a segment manufacturing mold for manufacturing a segment to form a segment mold, even when a plurality of types of segments having different shapes constituting a segment ring are manufactured, all segments can be manufactured. Since the segment joint part mold is manufactured from the master mold,
The manufacturing error of the segments is constant, and it is difficult for a gap between the joint portions of the segment molded products formed by the respective mold frames to occur, so that a segment assembling error hardly occurs.

Further, a mold for a segment joint is manufactured by the above method, and the manufactured mold for a segment joint is fixed to an end of a mold for forming a segment for forming an arc-shaped lower surface of a segment. In this way, the mold for the segment joint portion is manufactured, and unlike the conventional case where the joint portion formwork is accurately manufactured by NC processing or the like independently for each formwork, unlike the conventional case, It is only necessary to perform NC processing only once in the formation of the mold end plate portion,
The material for the segment joint part itself is cheaper than steel,
For example, since it can be manufactured from concrete or the like, the cost of the mold for the segment joint portion can be reduced.

According to a second aspect of the present invention, two segment joint dies are produced by the method for producing a segment joint part according to the first aspect, and the two segment joint dies thus produced are manufactured in segments. It is characterized in that a fourth step of separately fixing the two ends of the mold is provided.

According to the method for manufacturing a mold for a segment joint part according to the second aspect of the present invention, the two segment joint part dies manufactured by the method for manufacturing a segment joint part mold according to the first aspect are divided into segments. By adding a fourth step of separating and fixing the both ends of the production mold, respectively, the mold for the segment joint is manufactured. Therefore, a plurality of the molds for the segment joint are manufactured, and a plurality of the molds for the segment joint are manufactured. The segment joints formed by the plurality of segment joint molds that are manufactured by fixing to the both ends of the segment joint mold separately from each other are manufactured by the same master mold, so that there is a manufacturing error. Is constant, and a segment that does not easily cause an error when assembling a segment ring, such as joining joints, can be formed.

The two segment joint dies manufactured by the method for manufacturing the segment joint dies may have the same shape, or may have different shapes. In this case, each is manufactured individually by the above-described method for manufacturing the segment joint portion mold. For example, as described in the conventional example, left and right symmetrical projections are formed on both joint portions, respectively, and a segment molded product (symmetrical wing segment) (a) which is convex in plan view may be formed. As described above, when a segment ring is formed using the symmetrical wing segment (a), the joint portion of each of these wing segments is formed to be used together with the asymmetrical wing segment (b) (c). The case where molds are individually manufactured will be described.

A method for manufacturing a segment joint part mold according to claim 1, wherein the respective symmetrical wing segment (a) and the asymmetrical wing segment (b) and (c) joint form frames are manufactured. Thereby, a mold for a segment joint portion for forming the left and right joint portions of the symmetrical wing segment is manufactured. A segment joint portion mold for forming the left and right joint portions of the symmetrical wing segment manufactured in this manner is installed so as to face both end portions of the segment production mold for forming the inner surface of the symmetrical wing segment. Thus, a formwork for forming the symmetrical wing segment is manufactured. Also, the formwork for the joint part of the asymmetrical wing segment is formed by using either one of the two segment joint part dies manufactured for the left and right joint parts of the symmetrical wing segment. It is manufactured by manufacturing two pieces and disposing them at both ends of a segment manufacturing mold for forming the lower surface of the asymmetrical wing segment.

In this way, the joint sections of the wing segments are manufactured, and the joint sections of the wing segments formed by these mold sections are formed from the same master mold. Since each is formed by the segment joint portion mold, a gap in the joint portion is hardly generated, that is, a segment manufacturing error hardly occurs.

According to a third aspect of the present invention, there is provided the method of manufacturing a segment joint part forming frame according to the second aspect, wherein the two segment joint part dies are respectively fixed to both ends of the segment manufacturing die. After the step, a fifth step of attaching a detachable template for forming a key or a key groove at a joint portion of a segment formed by the segment joint portion mold is added to the segment joint portion mold. It is characterized by:

The mold end plate portion of the master mold (base mold) is manufactured by NC processing or the like accurately corresponding to a joint portion of a segment to be molded. Further, the master mold may have any number of steel mold end plate portions as long as they are formed corresponding to the joint portions of the segments to be molded. A configuration having a symmetrical form end plate portion is exemplified.

According to the method for manufacturing a mold for a segment joint part according to the third aspect, the same effect as that of the invention according to the second aspect can be obtained, and the two segment joint part dies can be segmented. After the fourth step fixed to both ends of the mold, a key or a key is attached to each of the segment joint portions fixed to the segment joint portion mold to the joint portion of the segment formed by the segment joint portion mold. Since a fifth step of attaching a detachable template for forming a key groove is added, a key or a key groove is provided at a joint of a segment formed by the segment joint mold. Even when removing the segment from the segment joint form,
It can be removed together with the template, and a segment joint having a key or a key groove can be easily manufactured.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a segment joint portion formwork for forming a segment joint portion of a segment used for lining a shield tunnel, which corresponds to a joint portion of a segment to be formed. A first step of installing a master mold having a mold end plate portion formed by the above, and solidifying the inside of the mold end plate portion of the master mold along the form end plate portion with the passage of time. A second step of flowing a fluid to be formed to form a segment joint shape, a third step of removing the segment joint shape from the master mold, and forming the segment joint shape into a segment. A fourth step of placing the fluid on the outside of the segment joint part shaped body along the segment joint part shaped body to form a segment joint part mold part after setting the mold. When, it is characterized by comprising a fifth step of demolding the segment joint portion shaped body from type for the segment production.

The fluid may be any fluid as long as it solidifies as time passes, as described.
For example, resin, concrete, and the like can be used.

According to the method of manufacturing a mold for a segment joint part according to a fourth aspect of the present invention, a mold for a segment joint part for forming a joint part of the segment is provided with a mold end plate part formed on the master mold. It can be manufactured as the same shape. Therefore, when manufacturing a plurality of molds for a segment joint part having the same shape, the segment joint part shape body is used, so that the segment is formed on the basis of the master mold without using NC processing or the like for each production of each mold frame. Since the joint part mold is manufactured, it is possible to easily form the joint parts of the segments such that the entire surfaces of the joint parts of the segments to be the joint parts of the segments coincide with each other. Even in the case where the shapes of the segments are different, unlike the conventional joint part formwork formed by separately processing, unlike the conventional case, the production error hardly occurs.

In the case where concrete is used as the fluid, since the form is made of the concrete, the cost of manufacturing the form is reduced as compared with the conventional steel form, and the durability of the form itself is improved. Can be done. Furthermore, since the segment joint part mold is manufactured using the segment joint part shape body formed by the master mold, the segment joint part molds are individually formed so that the joint parts coincide with each other by NC processing, unlike the related art. In addition to this, it is possible to limit the increase in the cost of the mold including NC processing to the basic master mold production once and to shorten the production process.

According to a fifth aspect of the present invention, in the method of manufacturing a segment joint part formwork according to the fourth aspect, after the fifth step of releasing the segment joint part shaped body from the segment production mold, A sixth step of attaching a detachable template for forming a key or a keyway to a joint portion of a segment formed by the segment joint portion mold frame on the formed segment joint portion mold portion. Features.

According to the method of manufacturing the segment joint form according to the fifth aspect, the same effect as the invention according to the fourth aspect can be obtained, and the segment joint-shaped body is formed by the segment manufacturing mold. A detachable template for forming a key or a key groove in a joint portion of a segment formed by the segment joint portion shape in the formed segment joint portion mold after the fifth step demolded from the mold. Since the method has the sixth step of attaching, a key or a key groove is provided in the joint portion of the segment formed by the segment joint portion formwork. By removing the segment molded together with the template, it can be easily removed from the mold, and the joint of the segment having a key or a keyway can be easily manufactured. It can be.

Each of the key and the key groove has a shape of a shearing key, and the shape may be any shape. For example, a ridge projecting from the joint surface of the segment in the circumferential direction of the segment and extending in the extending direction of the joint surface is generally used. These keys and key grooves are formed so as to fit each other.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mold for a segment joint part and a method of manufacturing a mold for a segment joint part according to the present invention will be described below with reference to FIGS.

First, the segment formed by the segment joint mold having the segment joint mold according to this embodiment is a segment having the same configuration as that referred to in the description of the related art. FIG. 19 is a development view of a segment ring for explaining a segment to be formed. As shown in FIG. 19, a segment formed by using the segment joint portion mold provided with the segment joint portion mold according to the present embodiment has a step in the joint portion in the axial direction, and the segment is formed by the step. It has an arc shape having two surfaces with different degrees of protrusion from the main body.

Here, the segment of such a form is
It is called a wing segment for convenience. Further, the wing segments shown in FIG. 19 are called (A) symmetrical wing segments whose left and right ends are symmetrical, and (B) and (C) are asymmetrical wing segments each having an asymmetrical parallelogram shape on both left and right sides. For discrimination, (B) is hereinafter referred to as an asymmetrical left segment, and (C) is referred to as an asymmetrical right segment. As shown in this figure, a segment ring is formed by combining these wing segments in the circumferential direction.

These wing segments (A),
In (B) and (C), an asymmetrical left wing segment (B) and an asymmetrical right wing segment (C) are respectively joined to the left and right sides of the wing segment (A) by two pieces, respectively. One (left side) joint portion A1 of the symmetrical wing segment (A) and one (left side) joint portion B1 of the asymmetrical left wing segment (B) have the same shape. The joint A2 on the other side (right side) of the symmetrical wing segment (A) and the joint C2 on one side (right side) of the asymmetrical right wing segment (C) have the same shape. The other (right) joint B2 of the wing segment (B) is joined to and joined to the left joint A1 of the symmetric wing segment (A), and is the other of the asymmetric right wing segment (C). The (left) joint portion C1 is configured to have a shape that matches and is joined to the right joint portion A2 of the symmetric wing segment (A).

Each of these wing segments (A),
An outline of a method of manufacturing a segment joint part mold provided with a segment joint part mold for forming the joint parts of (B) and (C) will be described with reference to FIGS. 1 and 2.

FIG. 1 is a view showing a segment mold provided with a segment joint portion mold according to the present invention, and a master mold for molding the segment joint portion mold.
(A) is a schematic perspective view showing the form AF of the above-mentioned symmetrical wing segment (A), (b) is a schematic perspective view of the form BF of the asymmetrical left wing segment (B), (c)
1 is a schematic perspective view of a mold CF of an asymmetrical right wing segment (C), and FIG. 2D is a schematic perspective view of a base mold 1 having a master mold for molding a segment joint portion mold.
FIG. 2 is a schematic perspective view of a mold for explaining a main part of a base mold 1 having a basic master mold used in a method for manufacturing a segment joint part mold and a segment joint part mold according to the present invention. .

Each of these wing segments (A),
The molds AF, BF, and CF for molding (B) and (C) are manufactured using the segment joint molds AL and AR, respectively, molded by the master mold of the base mold 1.

First, a base mold 1 having a master mold (see FIG. 1 (d)) having a form end plate portion formed corresponding to the joint portion of the symmetrical wing segment (A) is installed.

Here, the prototype 1 will be described. This prototype 1
As shown in FIG. 2, a bottom plate 2 having an upper surface formed in an arc shape corresponding to the lower surface of a wing segment which is to be a product by molding, and both end portions 2a and 2b of the bottom plate 2
And end plate portions T1, T2 formed corresponding to the joint portions A1, A2 (see FIG. 19) of the symmetrical wing segment (A) to be formed and formed on the upper surface of the bottom plate portion 2, respectively. Partition plates 26, 26 are provided on the upper surface of the frame end plates T1, T2 so as to extend in the axial direction at predetermined intervals from each other.

The form end plates T1 and T2 are respectively
Master mold (basic formwork) M with bottom plate 2
L and MR. Although not shown in FIG. 1, the front and rear side edges 2c and 2d of the bottom plate 2 (see FIG. 2) and the front and rear side edges of the left and right frame end plates T1 and T2 are U-shaped. Openings 21 formed so as to surround each other
The rear opening 22 (the portion to be the ring joint of the segment formed by the mold) is closed by the front and rear end plates 28 and 29 when the mold is taken. These front and rear end plates 28, 2
9 is for forming the segment ring joint surface of the segment to be formed, and is provided detachably from the base die 1.

The bottom plate 2 has an arc-shaped upper surface 20 at the lower portion.
Are supported by a support portion 23 (omitted in FIG. 2, see FIG. 1), and the radius of curvature of the upper surface 20 of the bottom plate portion 2 is symmetrical wing segment (A), asymmetrical wing segment (B), It is the same as the inner diameter of the segment ring assembled by (C), and its dimensions are arbitrary.

The left and right mold end plates T1 and T2 are portions (the base mold 1) sandwiched between the left mold end plate T1 and the partition plate 26, and the right mold end plate T2 and the partition plate 26. Inside part)
D and E are formed corresponding to the segment joints A1 and A2 (see FIG. 19) formed when concrete is flowed and solidified, respectively. In other words, a step is formed on each of the inner side surfaces of the left and right end plate portions T1, T2, and each of the left and right end plate portions is bent at two places.
Each of the symmetrical wing segments (A) to be formed is formed into a shape that can be joined and joined with each of the joint portions A1 and A2.

That is, as shown in FIG. 1, the left and right mold end plate portions T2 are provided inside the left mold end plate portion T1 and the right mold end plate portion T2 of the master molds ML and MR.
A fluid, such as concrete, which solidifies with the passage of time is cast along each of T1 and T2 to form the segment joint portion molds AL and AR. In FIG. 1 (d), the appearance of placing the fluid in the ML is indicated by a white arrow, and the arrow indicates the AL.
FIG. Next, the molds AL and AR for the segment joint are connected to the master molds ML and M, respectively.
Release from R, and wing segment (A),
(B), (C) The segment production type AF1, BF1, CF constituting the arc-shaped bottom plate portion of the formwork AF, BF, CF.
And fixed to both ends of each of them separately. Thereby, each wing segment (A), (B),
The molds AF, BF and CF of (C) are manufactured. Note that AR is formed in the same manner as AL in (d), so that it is omitted in the figure.

That is, as shown in FIG. 1 (a), the symmetric wing segment (A) is a segment production type AF1 which constitutes a bottom plate for forming an arc-shaped lower surface of the symmetric wing segment (A). Is fixed to the upper surface of the left end portion AF1a of the right end portion AF1a.
It is manufactured by fixing a segment joint mold AR on the upper surface 1b.

The asymmetrical left wing segment (B) is prepared by preparing two molds AL for the segment joint portion formed by casting the fluid on the master mold ML provided in the base mold 1. The left and right ends BF1a, BF of the segment production type BF1 serving as the bottom plate for forming the arc-shaped lower surface of the asymmetrical left wing segment (B) by using the two molded segment joint portions AL, AL.
It is manufactured by being opposed to and fixed to the upper surface of the upper surface 1b.

Further, in the asymmetrical right wing segment (C), two molds AR for a segment joint portion formed by casting the fluid on the master mold MR provided in the base mold 1 are prepared. These two segment joint molds AR, AR are joined to the left and right end portions CF1a, CF1a, of the segment production mold CF1 constituting the bottom plate for forming the arc-shaped lower surface of the asymmetrical left wing segment (C).
It is manufactured by being opposed to and fixed to the upper surface of the CF 1b in a spaced state.

The master molds ML, MR having the left and right mold end plates T1, T2 formed corresponding to the joints of the wing segments (A), (B), (C) thus formed. The molds AL and AR for the segment joint are manufactured by
By means of MR, a plurality of molds AL and AR for a segment joint having substantially the same shape can be manufactured.

Therefore, the segment joint type AL,
AR manufactures each wing segment (A), (B), (C), and each segment production type AF1, BF
1 and CF1 respectively, the segment molds AF, BF and CF can be formed respectively.
Therefore, when a segment ring is formed by the wing segments (A), (B), and (C) formed by these segment molds, the wing segments (A), ( B),
(C) joint parts A1, B1, and B2 to be joined,
A2, C1, and C2 are molded from the same master mold. Therefore, each joint A
The manufacturing errors of 1, A2, B1, B2, C1, and C2 become constant, and a gap between the joint portions of the wing segments is less likely to occur, and a segment assembly error is less likely to occur.

Furthermore, the segment joint AL and AR are manufactured by the above-described method, and the manufactured segment joint AL and AR are formed into a wing segment by molding the lower surface of the segment as described above. Type A
Ends AF1a, AF1b, BF of F1, BF1, CF1
1a, BF1b, CF1a, and CF1b, respectively, thereby producing wing segment forms AF, BF, and CF having a form for a segment joint, respectively, as in the related art. Unlike the one in which the joint molds ML, MR are independently manufactured accurately by NC processing or the like, the forming of the mold end plates T1, T2 of the master molds MR, ML provided in the base mold 1 is performed once each. It is only necessary to perform the NC processing, and the molds ML and MR for the segment joints can be made of concrete, which is cheaper than steel, so that the cost of manufacturing the joint form can be reduced. I have.

Incidentally, the joints of the wing segments (A), (B), and (C) having the above-described shapes are provided with the joints shown in FIG.
As shown in FIG. 18 and FIG. 18, there are two types of male and female shear keys that are fitted to each other on the joint surface of the joint part that joins the segments. The wing segments (A), (B) and (C) shown in FIG.
In each joint surface where the step of each joint part is formed, joint surfaces A11, A21, B11, B2
2, C12 and C21 respectively have a male shearing key (key) S1 and joint surfaces A12, A22, B12 and B2.
Each of 1, 1, 11, and 22 is provided with a female shearing key (key groove) S2, and the key S1 and the key groove S2 are formed so as to fit each other. The key S1 in FIG. 17 has the same shape as the key groove S2, that is, the length and the height of the key S1 in the extending direction and the length and the depth of the key groove S2 in the extending direction are the same. Is what it is.

In the wing segments (1A), (1B), and (1C) shown in FIG. 18, the joint surfaces a11, a21, b12, and b21, c11, c22
Has a male shearing key (key) S3, and joint surfaces a12, a22, b11, b22, c12, c21.
Are provided with a female shearing key (key groove) S4 which is fitted with the key S3 but has a different shape from the key S3. The length in the extending direction of the key S3 in the wing segments (1A), (1B), and (1C) shown in this figure is shorter than that of the key groove S4.

A description will be given of a case where the wing segment joint form in which the male and female keys S1 to S4 are formed on the joint surface as described above using the master mold as described above. FIG. 3 is a schematic plan view for explaining a case where a wing segment joint section form having male and female keys formed on a joint surface is manufactured using a master mold, and FIG. FIG. 7B illustrates a case where the key and the keyway have the same shape, FIG.
(C) is a figure explaining the case where the mutual shape of the key and the keyway which are each formed in the joint part so that fitting is possible mutually is different.

1. The case where the key and the key groove formed in the joint portion of the segment have the same shape as each segment shown in FIG. First, a key S1 of the same shape is attached to the joint shown in FIG.
In the case of manufacturing a segment joint forming frame for forming a wing segment having the key groove S2 formed therein, as described above, the wing segments (A), (B), and (C) not considering the key and the key groove. It is manufactured almost in the same way.

That is, as shown in FIG. 3A, the segment joint mold AL formed by the master mold ML is fixed to the segment production mold F as it is, so that the segment joint mold as a product is obtained. Frames can be manufactured. At this time, the shape of the mold end plate portion of the master mold is formed corresponding to the joint portion of the segment to be molded.

FIGS. 4 to 6 show a key S1 of the same shape in the joint portion.
FIG. 4 is a perspective view of each wing segment formwork having a keyway S2, and FIG. 4 is a wing segment (A) formwork having a segment joint part formwork for forming a symmetrical wing segment (A) segment joint part. It is a perspective view of.

As shown in FIG. 4, the formwork 100 (AF in FIG. 1) of the symmetrical wing segment (A)
Joint A1 on the left side of the symmetric wing segment (A)
A mold 7 (see FIG. 1) for forming a segment joint portion (see FIG. 19) and a mold 8 (see FIG. 1) for forming a joint portion A2 on the right side of the symmetrical wing segment (A). AR) and the segment joint molds 7 and 8 are installed facing each other on the inside, and are generally constituted by a segment production mold 90 for molding the bottom plate surface of each wing segment to be molded.

The inner ends of the segment joint dies 7, 8 are formed corresponding to the respective shapes of the joints A1, A2 (see FIG. 19) of the above-mentioned symmetrical wing segment (A). In other words, the segment joint dies 7, 8
Are provided with steps at the step surfaces 7a, 8a substantially at the center of the inner surface, and the inner protruding end surfaces 7b, 8b protruding inward on the back side from the step surfaces 7a, 8a, respectively.
And side end surfaces 7c, 8c located on the front side of the step surfaces 7a, 8a and outside the inwardly projecting end surfaces 7b, 8b.

As shown in FIG. 4, the joint surfaces A1 of the symmetrical wing segment (A) to be formed are provided on the inner projecting end surfaces 7b, 8b of the segment joint dies 7, 8 respectively.
2, a female shear key forming template 5 having protrusions 52a, 52a for forming key grooves S2 of A22 (see FIG. 17).
2, 52 are detachably attached. Grooves 7d, 8d for forming the male shear keys S1, S1 of the joint surfaces A11, A21 of the symmetrical wing segment (A) are respectively formed on the side end surfaces 7c, 8c.
c, 8c are formed in the extending direction.
Male shear key forming templates 51, 51 are attached to the upper portions of d, 8d so that the molded male shear keys (keys) S1, S1 can have a removal gradient. The lower end surfaces of the male shear key forming mold plates 51, 51 form upper side surfaces of the grooves 7d, 8d, respectively. The segment manufacturing die 90 is formed in a box shape with an open top.

The symmetrical wing segment (A) is formed by placing a fluid, such as concrete, which solidifies with the passage of time at the center of the formwork 100 of the symmetrical wing segment (A) thus constructed. Can be molded.
It is needless to say that a reinforcing bar or the like may be provided at a portion where the fluid is to be cast when the fluid is poured. In the figure, 7
Numeral 1 is for forming a bolt hole to be provided in the joint portion of the symmetrical wing segment (A) to be formed.

When the formed symmetrical wing segment (A) is released from the mold frame 100, the male shear key forming template 51 and the female shear key forming template 52 are released together with the symmetrical wing segment (A). After completely removing the mold wing segment (A) and removing them, the symmetrical wing segment (A) is provided with the shear keys S1 and S2 of the joints A1 and A2. . Therefore, even if a key or a key groove is provided in the joint portion, the molded wing segment can be easily removed from the joint.

FIG. 5 shows a segment joint portion mold 7 (7) for forming the segment joint portions B1, B2 (see FIG. 17 or FIG. 19) of the asymmetrical left wing segment (B).
7A is a perspective view of a mold 101 of an asymmetrical left wing segment (B) having 7 (7B). FIG. Formwork 101 of asymmetrical left wing segment (B) shown in this figure
Are molds 7 and 7 for a segment joint portion for molding left and right joint portions B1 and B2 of an asymmetrical left wing segment (B) (hereinafter, 7A is arranged and fixed on the left side, and 7B is formed on the right side). ), And the left and right segment joint dies 7A and 7B are installed to face inward, and the segment forming die 90 for forming the lower surface of the asymmetrical left wing segment (B) to be formed.
A.

Since the segment joint dies 7A and 7B and the segment working dies 90A have the same form as the segment joint dies 7 and the segment working dies 90, respectively, they will be described with reference numerals. Is omitted.

The respective shapes of the inner surfaces of the opposed segment joint molds 7A and 7B are arranged so as to be point-symmetric about the center of the segment working mold 90A. That is, a step is formed on the inner surface of the segment joint portion mold 7B disposed and fixed on the right side, and the side end surface portion 7c having a surface deeper than this step is disposed and fixed on the left side of the segment production die 90A. A groove 7d for forming a key is formed in parallel with the inner projecting end face 7b of the segment joint portion mold 7A, and in order to take a demolding gradient of a portion formed by the groove 7d,
A male shearing key forming template 51 for key formation, which is detachable along the upper part of the groove 7d, is attached along the inner protruding end face. The lower end surface of the template 51 is the groove 7
d constitutes the upper side surface.

In the segment joint part mold 7B on the right side of the segment production mold 90A, the side end face part 7b having a surface on the front side of the step is arranged and fixed on the left side of the segment production mold 90A. It is formed in parallel with the side end face 7c of the mold 7A, and has a shape for forming the key groove S2. That is, a detachable female shear key forming template 52 provided with a projection 52a for forming a key groove S2 (see FIG. 17) of the joint surface B21 to be molded is attached to the side end face 7b. Have been.

FIG. 6 shows the segment joints C1 and C2 of the asymmetrical right wing segment (C) (see FIG. 19).
It is a perspective view of the frame of the asymmetrical right wing segment (C) which has the segment joint part type | mold which shape | molds this.

As shown in FIG. 6, the formwork 103 (corresponding to CF in FIG. 1) of the asymmetrical right wing segment (C) is provided with a joint C1 on the left side of the asymmetrical right wing segment (C). 8A for the segment joint part for molding
(8) and a segment joint portion mold 8B for forming the right joint portion C2 of the asymmetrical right wing segment (C).
(8), and the segment joint dies 8A and 8B are installed facing each other on the inside, and are roughly constituted by a segment production die 90B for forming a bottom plate surface of a segment to be formed. In addition, the segment production type 90B has the same structure as the segment production types 90 and 90A, and the description thereof is omitted. Also, the segment joint portion dies 8A, 8B
Has the same structure as that of the segment joint portion mold 8 described above, and the same reference numerals are given and the description is omitted.

The segment joint portion mold 8B is formed corresponding to the left joint portion C1 of the asymmetrical right wing segment (C) to be manufactured, and is formed on the right side of the symmetrical wing segment (A). Since the joint portion A2 is the same as the joint portion A2 and the arrangement and fixed state are the same, the description is omitted. The segment joint portion die 8A disposed on the left side of the segment manufacturing die 90B has a step surface 8a substantially at the center of the inner end thereof, and has a side end surface portion 8c having a surface deeper than the step surface 8a. It is in a state of being located outward from the side end surface portion 8b on the near side. This back side end face 8c
A groove 8d for forming a male shearing key S1 (see FIG. 17) on the joint surface C12 is formed on the joint surface C12.
A detachable male shear key forming template 51 having a lower end surface forming the upper side surface of the groove 8d is attached to the upper part of the upper part.

In the segment joint portion mold 8A, a female shearing key (key groove) is provided on the joint surface C11 at the side end surface portion 8b which is disposed inside the deeper side end surface portion 8c by the step surface 8a. A female shear key forming template 52 having a projection 52a forming S2 (see FIG. 17) is detachably attached. These segment joint molds 8A and 8B are arranged and fixed so as to be point-symmetric about the center of the segment working mold 90B, and have the same configuration.

By casting a fluid, such as concrete, which solidifies with the passage of time on the molds of the segments configured as described above, the molds 100, 101, and 103 of the respective segments are used as shown in FIG. As described above, the wing segments (A), (B) and (C) in which the key S1 and the key groove S2 having the same shape are formed in the joint portion can be formed.

Each segment joint part mold 7
A male shear key (key) forming template 51 and a female shear key forming template 52 for forming the male shear key S1 and the female shear key S2 in (7A, 7B), 8 (8A, 8B), respectively. Fig. 7 shows the state where
And FIG. This configuration has the same configuration in any part as long as it is a joint portion in which a key and a key groove are formed. Here, the description will be made on the assumption that the segment joint portion mold 7 is used.

FIG. 7 is a view showing a structure of a segment joint portion mold for forming a male shear key (key) S1.
(A) is a vertical cross-sectional view of a segment joint portion mold 7 including a male shearing key (key) forming template 51, (b) is a diagram of molding the segment joint portion mold 7 from a master mold. Segment joint part mold 7 and master mold ML
FIG. 6 is a vertical cross-sectional view of the master mold ML showing a relationship with the master mold ML. FIGS. 8A and 8B are diagrams showing the configuration of the segment joint portion mold 7 for forming the female shear key forming template 52. FIG. 8A is a longitudinal sectional view of the segment joint portion mold 7, and FIG. It is a longitudinal cross-sectional view of the master mold ML showing the relationship between the segment joint part mold 7 and the master mold ML when the segment joint part mold 7 to which the female shear key forming template 52 is attached is formed.

According to the configuration in which the male shearing key (key) S1 is formed as shown in FIG. 7 (a), a fluid such as concrete solidified with the passage of time inside the segment joint mold 7 is formed. When a segment is formed and the mold is released from the segment joint portion mold, a male shearing key (key) forming template is provided above the key S1 portion of the cast fluid. Since the wing segment 51 is arranged and the wing segment molded product can be pulled out together with the key S1 and removed from the mold, a wing segment having a joint portion having a joint surface on which the key S1 is formed is manufactured. can do. FIG. 7 (b) shows a method for manufacturing a segment joint portion mold having such a shape.
As shown in the figure, from the point of molding by the master mold, the position of the male shearing key (key) forming template 51 installed at the tip of the key and the upper part of the key is molded in a predetermined shape. Must.

In this case (b), the first metal part 12 fixed to the mold end plate part T5 of the master mold and the second metal part 13 attached to the first metal part are used for the segment joint part. The mold is molded. That is, the first hardware 12
Is for forming the projection of the key on the segment joint portion mold. In addition, when the second metal fitting 13 is used as a part of the product joint frame, a male shearing key (key) is formed on the second metal joint 13 together with the formed segment. Forming a part to which the template 51 is attached, and a male shearing key (key)
The second metal member 1 is formed in the same shape as the forming template 51.
A male shearing key (key) forming template 51 may be used instead of 3.

Further, since the segment joint portion mold to which the female shear key forming template 52 is attached is configured as shown in FIG. 8A, the female shear key forming template 52 is The fluid is poured inward along the attached segment joint portion mold 7, and the formed wing segment is released together with the female shear key forming template 52 to form a female shear key forming die. By removing the plate 52 from the segment molded product, it is possible to manufacture a wing segment joint having a joint surface in which a key groove is formed in the joint. The side end to which the female shear key forming template 52 is attached is mounted on the fluid casting surface of the mold end plate portion T7 before the master mold ML forms the female shear key forming template. A long jig 15 used to pull out the upper part 52 and a protruding part 52 a protruding toward the form end plate to the lower side of the long jig 15 for forming a female shear key. It is formed by attaching the template 52 and casting a fluid on the back of the female shear key forming template 52.

2. The case where the shapes of the key and the key groove formed in the joint portion of the segment are different as shown in FIG. The following two manufacturing methods are conceivable. (1). The key S3 and the key groove S of different shapes are formed on the joint part.
4 is formed (FIG. 18).
3), a master mold ML is formed as shown in FIG. 3B.
To form a segment joint shape AAL having the same shape as the wing segment joint, and install the segment joint shape AAL in the segment production form F which is a product formwork of the segment. AAL
Can be manufactured by casting a fluid such as concrete that solidifies with the passage of time, and removing the segment joint-shaped body AAL (shown by an arrow in the figure).

(2). As shown in FIG. 3 (c), a mold end plate portion T6 having the same shape as the segment joint portion to be molded is installed in the master mold ML.
L is used to form the segment joint mold AL, and the formed segment joint mold AL is used as a product to form the bottom plate of the segment joint mold frame.
It is manufactured by fixing to the end. This differs only in the shape of the frame end plate portion T6 of the master mold ML, and is the same as the manufacturing method of (A), so that the detailed description is omitted.

That is, in the master mold ML for forming the segment joint portion mold manufactured by this manufacturing method, the shape of the mold end plate portion T6 is such that the wing formed by the segment joint portion mold which has become a product. Since these are formed in the same shape as the joint portions of the segments, and a template for removing the key and the key groove is attached to each of them, these segment joint portion dies are shown in FIGS. 7 and 8. The shape is as shown in FIG.

In the following, as described in (1),
A method for manufacturing a symmetrical wing segment (A) joint part formwork will be described using the segment joint part shaped body formed by the master mold of the present invention as a mold. The keys and the key grooves of the segment joints manufactured by the manufacturing method described below are described as having the same shape in the drawings. However, according to this manufacturing method, the keys and the key grooves are formed so as to fit each other. Even if the key and the keyway have different shapes, the key and the keyway can cope sufficiently, and each wing segment shown in FIG. 18 can be manufactured.

FIGS. 9 to 16 are views for explaining the manufacture of a wing segment formwork using a master mold.
FIG. 9 is a diagram showing a state in which a fluid that solidifies over time is poured into the base mold 1 having the master molds ML and MR to form a segment joint shape.
Fig. 11 is a perspective view showing a solidified fluid-made segment joint portion shaped body formed in Fig. 9; Fig. 11 is a diagram showing a cross-sectional view of a segment joint portion of the joint portion shaped body of Fig. 10; Is a vertical sectional view taken along line GG of FIG. 10, and FIG.
It is an HH line longitudinal sectional view. FIG. 12 is a conceptual front view for manufacturing a left-side joint formwork of a symmetrical wing segment, and FIG. 13 shows a joint-forming body in a segment production mold of a segment formwork for forming the inner surface of a wing segment. FIG. 14 is a view showing a state in which the joint is formed, and FIG. 14 is a view showing a state in which the joint-shaped body is installed in the segment manufacturing mold. FIG. And FIG. 16 is a diagram showing a segment joint portion mold of a molded segment formwork with the segment joint portion shape removed from the segment production mold.

First, as shown in FIG. 9, in the base mold 1 having the master molds ML and MR, an inner portion partitioned by the left mold end plate 4 (corresponding to T1 in FIG. 1) and the partition plate 26. D, along the left-side formwork end plate portion 4,
A fluid that solidifies as time elapses is cast to form the segment joint shape AAL. Then, the segment joint portion shape body AAL is released from the master mold ML.

FIG. 10 shows the detached segment joint body AAL. The segment joint portion shaped body AAL has the same shape as the joint portion A1 on the left side of the symmetrical wing segment (A) formed by the segment joint portion formwork according to the present invention. As shown in FIG. 11, a portion corresponding to the left joint portion A1 of the segment joint portion shape body AAL includes a left mold of the master mold 1 when the segment joint portion shape body AAL is released from the master mold 1. A male shear key forming template 51 and a female shear key forming template 52 which are detached from the end plate portion 4 are attached.
The male shear key forming template 51 and the female shear key forming template 52 are also detachable from the segment joint portion-shaped body AAL.

Then, as shown in FIG. 12, the segment joint shape member AAL is arranged on the segment manufacturing die F, and concrete is arranged outside the segment joint shape member AAL along the segment joint shape member AAL. A fluid that solidifies with the passage of time, such as the time, is cast, and a segment joint mold 7C (the segment joint mold AL in FIG. 1 and the segment joint mold 7 in FIG. ) Is manufactured.

Hereinafter, a method of manufacturing the segment joint portion mold 7C will be described in detail. As shown in FIG. 13, a male shear key forming template 51 and a female shear key forming template 5 are provided.
2 is attached to the segment joint body AA
L is an upper surface spaced a predetermined distance from the left end Fa of the segment forming die F (similar to the above-described segment forming die 90) of the segment mold for forming the inner surface of the wing segment to be a product. To place.

Then, as shown in FIG. 14, the outside of the segment joint shape member AAL, that is, between the segment joint portion shape member AAL arranged on the segment production die F and the left end Fa of the segment production die. In the space I, a fluid that solidifies with the passage of time as shown by the arrow is cast to form a segment joint portion mold portion for molding the joint portion A1 on the left side of the wing segment (A).

Next, as shown in FIG. 15, the joint-shaped body AAL is removed from the segment manufacturing die F with the male shear key forming template 51 and the female shear key forming template 52 attached. Then, a segment joint portion mold 7C (corresponding to AL in FIG. 1) for molding the joint portion A1 on the left side of the wing segment (A) is manufactured. In addition, FIG.
As shown in FIG. 6, a male shear key forming template 5 is provided on the left side of the segment joint portion mold 7C of the segment mold.
1 and a female shear key forming template 52 are mounted at predetermined positions. The segment joint part mold 7C manufactured in this manner has the same shape as the inner surface of the left mold end plate 4 of the base mold 1 described above.

Further, as shown in FIG. 9, a segment joint mold using the segment joint mold AAR can be manufactured in the same manner. That is, the segment joint portion mold 8 for the right joint portion of the symmetrical wing segment (A) 8
(See FIG. 4) is the right form end plate portion 6 (T2 in FIG. 1).
), And is formed in the same manner as the left-side segment joint mold 7C described above. In addition,
The segment joint portion mold 8 corresponds to the segment joint portion mold AR of FIG. In detail, the prototype 1 shown in FIG.
A fluid that solidifies with the passage of time is poured into the inner portion E along the right mold end plate 6 to form a right segment joint shape AAR, and the right segment joint shape AAR is formed. Is removed from the master mold 1.

Then, the detached segment joint-shaped body AAR is placed adjacent to a predetermined position of the segment manufacturing die F, which is a predetermined manufacturing form, in other words, a position where the segment joint die is formed. In this case, the above-described fluid is cast on the outside, and the segment joint shape body AAR is released from the mold to form a mold for the segment joint. With the combination of the segment joint portion molds AAL and AAR formed as described above, each wing segment can be manufactured by a combination similar to that shown in FIG.

As described above, in the mold for molding each wing segment (A), (B), (C), the segment joint mold AL, which molds each joint, is used.
Since AR, AAL, and AAR are manufactured from the same master mold as the joint mold used to form the joint to be joined, there is little possibility that a dimensional error occurs in the joint of the formed wing segment. Thus, the joining portions of these formed wing segments that are adjacently joined are more likely to coincide with each other, and a high-quality wing segment can be formed.

According to the method of manufacturing the segment joint portion mold of the embodiment as described above, the segment joint portion mold 7 for forming the joint portion of each wing segment (A), (B), (C). , 7A, 7B, 8, 8A, 8B,
It can be manufactured as the same shape as the steel left and right mold end plates 4, 6 of the master mold formed in the base mold 1.

Therefore, the symmetrical wing segment (A)
Of the left side of the asymmetrical wing segment (B), and a segment joint part mold 7 for the left side joint part A1 of FIG.
1A, a segment joint portion 8 for the right joint portion A2 of the symmetric wing segment (A) and a segment joint portion for the right joint portion C2 of the asymmetric right wing segment. When manufacturing a plurality of molds for the segment joint portion having the same shape such as the mold 8A, by using the segment joint portion shape bodies AAL and AAR, the work of performing NC processing and forming is used only for the production of the master mold 1, It is possible to easily manufacture a mold for a segment joint portion in which a gap is less likely to occur and can be settled within a certain error.

In other words, since the segment joint molds 7, 7A, 8, 8A are manufactured with reference to the master mold 1, the joint surfaces of the segments which are the joints between the segments coincide with each other. The joint part of the segment can be easily formed, and even if the shape of the segment having the joint part connected to each other is different, unlike the conventional joint part form formed by processing each separately In addition, a manufacturing error hardly occurs. Also,
Since the mold is manufactured using a fluid such as concrete that solidifies with the passage of time, the cost of manufacturing the mold can be reduced as compared with the conventional steel mold, and the durability of the mold itself can be improved.

Further, since the segment joint portion mold 7C is manufactured using the segment joint portion shape bodies AAR and AAL formed by the base die 1, unlike the conventional case, the joint portions are made to coincide with each other by NC processing. This eliminates the need to separately manufacture the molds for the segment joints, thereby limiting the increase in the formwork cost including NC processing to one basic master mold production and shortening the production process.

In addition, according to the method for manufacturing the segment joint part mold of the above embodiment, after the step of removing the segment joint part shape from the segment production mold, the formed segment joint part mold is formed. A detachable male shear key forming template 51, 51 and a female shear key forming template 52, 51 for forming a key or a key groove in a joint portion of a segment formed by the segment joint portion. 52
Since there is a process such as attaching, even if a key or a key groove is provided in the joint portion of the segment formed by each segment joint portion mold, by removing the template together with the formed segment,
A segment having a key or a keyway can be easily manufactured.

In the above-described embodiment, the mold for the segment joint portion has been described as forming the joint portion of the wing segment. However, the present invention is not limited to this, and the shape of the joint surface is not bent by a step. Of course, it can also be used for forming a segment joint of a segment.

For example, A constituting a segment ring
When molding the mold, the B-type and the K-type segments, molds are manufactured for each shape, and NC
Since the joints are individually manufactured by processing, etc., if the molds for the segment joints are manufactured and applied as described above, dimensional errors of the joints of these molds hardly occur, and the accuracy of the joints is reduced. Can be improved,
It is possible to obtain substantially the same effect as the above embodiment. Also, unlike the conventional method in which concrete is poured into a steel mold and the segments are formed by removing the mold from the steel mold, when the mold is duplicated, the dimensional error of the joint portion is small. The mold for the segment joint can be duplicated.

In the above embodiment, the segment joint portion mold and the segment joint portion shape bodies AAL and AAR may be formed by casting concrete, and are not limited to concrete but may be solidified over time. Any body may be used.

Further, since the segment joint portion mold in the above embodiment is configured as described above, it has the strength and durability as a mold frame, and the required quality as a product of the segment molded by this is achieved. A satisfactory form accuracy can be easily secured.

[0095]

As described above, according to the method for manufacturing a segment joint part mold according to the first aspect of the present invention, a plurality of segment joint part molds having substantially the same shape can be manufactured by this master mold. Accordingly, the segment joint portion mold can be attached to a segment manufacturing mold for manufacturing a segment to form a segment mold. Therefore, even when a plurality of types of segments having different shapes constituting the segment ring are manufactured, since all the segment joint molds are manufactured from the master mold, the manufacturing error of the segments is constant, and the molding is performed by each mold. It is difficult for a gap between the joints of the segment molded products to occur, and a segment assembling error hardly occurs. Further, unlike the conventional method, which is different from the conventional method in which the joint part formwork is accurately manufactured independently by NC processing for each formwork, the NC processing is performed only once in forming the mold end plate portion of the master mold. By simply performing this, a plurality of molds for the joint portion can be formed by the master mold. In addition, the segment joint portion mold itself can be manufactured from a material less expensive than steel, such as concrete, and the cost of the segment joint portion formwork can be reduced.

According to the method for manufacturing a mold for a segment joint part according to the second aspect of the invention, the two segment joint part dies manufactured by the method for manufacturing a segment joint part mold according to the first aspect are divided into segments. By adding a fourth step of separating and fixing the both ends of the production mold, respectively, the mold for the segment joint is manufactured. Therefore, a plurality of the molds for the segment joint are manufactured, and a plurality of the molds for the segment joint are manufactured. The segment joints formed by the plurality of segment joint molds manufactured by fixing to the both ends of the segment joint mold separately from each other are manufactured by the same master mold, so that there is a manufacturing error. Is constant, and a segment that does not easily cause an error when assembling a segment ring, such as joining joints, can be formed.

According to the method for manufacturing a mold for a segment joint part according to the third aspect, the same effect as that of the invention according to the second aspect can be obtained, and the two segment joint part dies can be formed into segments. After the fourth step fixed to both ends of the mold, a key or a key is attached to each of the segment joint portions fixed to the segment joint portion mold to the joint portion of the segment formed by the segment joint portion mold. Since a fifth step of attaching a detachable template for forming a key groove is added, a key or a key groove is provided at a joint of a segment formed by the segment joint mold. Even when removing the segment from the segment joint form,
It can be removed together with the template, and a segment joint having a key or a key groove can be easily manufactured.

[0098] According to the method of manufacturing a mold for a segment joint part according to the fourth aspect, the mold for the segment joint part for forming the joint part of the segment is connected to the mold end plate part formed in the master mold. It can be manufactured as the same shape. Therefore, when manufacturing a plurality of molds for a segment joint part having the same shape, the segment joint part shape body is used, so that the segment is formed on the basis of the master mold without using NC processing or the like for each production of each mold frame. Since the joint portion mold is manufactured, it is possible to easily form the joint portions of the segments so that the entire surfaces of the joint portions of the segments to be the joint portions of the segments coincide with each other. Even in the case where the shapes of the segments are different, unlike the conventional joint part formwork formed by separately processing, unlike the conventional case, the production error hardly occurs.

When concrete is used as the fluid, since the mold is made of the concrete, the cost of manufacturing the mold can be reduced as compared with the conventional steel mold, and the durability of the mold itself can be improved. Can be done. Furthermore, since the segment joint part mold is manufactured using the segment joint part shape body formed by the master mold, the segment joint part molds are individually formed so that the joint parts coincide with each other by NC processing, unlike the related art. In addition to this, it is possible to limit the increase in the cost of the mold including NC processing to the basic master mold production once and to shorten the production process.

According to the method of manufacturing a mold for a segment joint according to the fifth aspect, the same effect as that of the invention according to the fourth aspect can be obtained, and the shape of the segment joint portion can be formed by the segment production mold. A detachable template for forming a key or a key groove in a joint portion of a segment formed by the segment joint portion shape in the formed segment joint portion mold after the fifth step demolded from the mold. Since the method has the sixth step of attaching, a key or a key groove is provided in the joint portion of the segment formed by the segment joint portion formwork. By removing the segment molded together with the template, it can be easily removed from the mold, and the joint of the segment having a key or a keyway can be easily manufactured. It can be.

[Brief description of the drawings]

FIG. 1 is a view showing a segment mold provided with a segment joint part mold according to the present invention, and a base mold having a master mold for molding the segment joint part mold.

FIG. 2 is a schematic perspective view of a mold for explaining a main part of a base mold 1 having a basic master mold used in a method for manufacturing a segment joint part mold and a segment joint part mold according to the present invention. is there.

FIG. 3 is a schematic plan view for explaining a case of manufacturing a wing segment joint section form having male and female keys formed on a joint surface by using a master mold.

FIG. 4 is a perspective view of a frame of a wing segment (A) having a segment joint portion mold for forming a segment joint portion of a symmetrical wing segment (A).

FIG. 5 is a perspective view of a frame of an asymmetrical left wing segment (B) having a segment joint portion mold for forming a segment joint portion of the asymmetrical left wing segment (B).

FIG. 6 is a perspective view of a frame of an asymmetrical right wing segment (C) having a segment joint portion mold for forming a segment joint portion of the asymmetrical right wing segment (C).

FIG. 7 is a view showing a configuration of a segment joint portion mold for forming a male shearing key (key) S1.

FIG. 8 is a view showing a configuration of a segment joint portion mold 7 for forming a female shear key forming mold plate 52;

FIG. 9 is a diagram showing a state in which concrete is poured into a base mold 1 having master molds ML and MR to form a segment joint portion shaped body.

FIG. 10 is a perspective view showing a concrete segment joint portion shaped body formed in FIG. 9;

FIGS. 11A and 11B are cross-sectional views of a segment joint portion of the joint-shaped body of FIG. 10; FIG. 11A is a vertical sectional view taken along the line GG of FIG. It is a longitudinal cross-sectional view.

FIG. 12 is a conceptual front view for manufacturing a left joint formwork of a symmetric wing segment.

FIG. 13 is a view showing a state in which the joint portion-shaped body is installed on the segment production mold of the segment formwork for molding the inner surface of the wing segment.

FIG. 14 is a view showing a state in which a joint portion-shaped body is installed in a segment production type.

FIG. 15 is a view showing a state in which concrete serving as a segment form joint is cast into a segment manufacturing die, and a segment joint portion shaped body is removed from the segment manufacturing die.

FIG. 16 is a view showing a segment joint portion mold of the formed segment mold.

FIG. 17 is a view showing a wing segment formed by a segment joint portion mold according to an example of the present invention.

FIG. 18 is a view showing another form of the wing segment formed by the segment joint portion mold according to an example of the present invention.

FIG. 19 is a development view of a segment ring assembled by wing segments.

FIG. 20 is a diagram showing a segment ring configured by using a plurality of wing segments (a), (b), and (c) each having three different shapes.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Base die 4 Left form end plate part (form end plate part) 6 Right form end plate part (form end plate part) 7, 7A, 7B Segment joint part type 8, 8A, 8B For segment joint part Mold 7b, 8b groove 51 Male shear key forming template (detachable template) 52 Female shear key forming template (detachable template) 90, 90A, 90B Segment production type 100, 101, 102 Segment Formwork (A) Symmetrical Wing Segment (Segment) (B) Asymmetrical Left Wing Segment (Segment) (C) Asymmetrical Right Wing Segment (Segment) T1, T2, T5, T6 Formwork End Plate A1 , A2, B1, B2, C1, C2 Segment joint part AAL, AAR segment joint part shape body AR, AL Segment production type F Segment production type

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Yama ▲ saki 1-20-10 Toranomon, Minato-ku, Tokyo Nishimatsu Construction F-term (reference) 2D055 BA01 EB10

Claims (5)

[Claims] 1. A method for producing a segment joint portion mold of a segment joint portion formwork for forming a segment joint portion of a segment used for lining a shield tunnel, the method corresponding to a joint portion of a segment to be molded. A first step of installing a master mold having a mold end plate portion formed by the above method, and solidifying the inside of the mold end plate portion of the master mold along the form end plate portion over time. A second step of flowing a fluid to be molded to form a segment joint portion mold, and a third step of removing the segment joint portion mold from the master mold. Manufacturing method of mold. 2. A method for manufacturing a segment joint part mold according to claim 1, wherein two segment joint part molds are respectively manufactured, and these manufactured two segment joint part molds are attached to both ends of a segment manufacturing mold. A method of manufacturing a mold for a segment joint, wherein a fourth step of fixing the molds apart from each other is added. 3. The method for manufacturing a mold for a segment joint part according to claim 2, wherein after the fourth step of fixing the two molds for the segment joint part to both ends of the segment forming mold, respectively, Fifth, a detachable template for forming a key or a key groove in a joint portion of a segment formed by the segment joint portion formwork is attached to the joint portion mold.
A method for manufacturing a mold for a segment joint part, the method comprising: 4. A method for manufacturing a segment joint portion formwork for forming a segment joint portion of a segment used for lining a shield tunnel, comprising: a mold formed corresponding to a joint portion of a segment to be molded. A first step of installing a master mold having an end plate portion, and flowing a fluid that solidifies over time along the form end plate portion inside the form end plate portion of the master mold. A second step of forming the segment joint portion shape, a third step of releasing the segment joint portion shape from the master mold, and after installing the segment joint portion shape in the segment production mold, A fourth step of casting the fluid outside the segment joint portion shape along the segment joint portion shape to form a segment joint portion mold portion; A fifth step that consists of a method for manufacturing a segment joint mold frame, characterized in that demolding the joint portion shaped body from type for the segment production. 5. The method of manufacturing a mold for a segment joint portion according to claim 4, wherein the segment joint portion formed after the fifth step of releasing the shape of the segment joint portion from the segment production mold. A sixth step of attaching a detachable template for forming a key or a keyway to the joint portion of the segment formed by the segment joint portion forming frame on the mold portion. Manufacturing method of part formwork.