JPH1181888A - Structure of segment made of reinforced concrete using joint tool made of glass fiber-reinforced plastic, and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce stress concentration to a segment made of reinforced concrete and a joint tool made of glass fiber-reinforced plastic by using a preliminarily molded joint tool made of glass fiber-reinforced plastic. SOLUTION: On joint surfaces 1a, 1b of a segment made of reinforced concrete for a shield tunnel, semicircular protruded parts 2a, 5a to be formed by the joint tool made of glass fiber-reinforced plastic embedded and integrally molded with it, and semicircular recessed parts 3, 6 are provided. By engaging the semicircular protruded parts 2a, 5a with the recessed parts 3, 6, shearing force to be applied to joint parts is transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass fiber reinforced plastic joint structure and a fitting for a reinforced concrete segment used in a shield tunnel, and a method of manufacturing a reinforced concrete segment.

[0002]

2. Description of the Related Art As shown in FIG. 10 which is a perspective view, a reinforced concrete lining in a conventional shield tunnel includes segment rings 61, 61... Are formed as conventional coupling means for the segments 60, 60... And the segment rings 61, 61. Segments of time 71,7
(1) A joint fitting having the same cross-sectional shape as the joint groove 73 is fitted into a joint groove 73 formed on the end face, which is the joint surface of the segments 71 provided with the seals 72, 72. On the other hand, as shown in FIG. 12 which is a sectional view, the segment rings 81, 81 formed as shown in FIG. 11 are connected to each other by a concave tenon 83 and the part of the convex tenon 84
A long through-hole 85 for a ring bolt 87 and a hole 86 for holding a nut 88 are formed in each segment ring 81, 81 in parallel with the axis of 1, 81 so as to be achieved by applying the ring bolt 87. As another example, as shown in FIG. 13 which is a cross-sectional view, when the segment rings are formed, the segments 91, 91 are connected to each other by a concave portion 93 formed at the end face which is a joint face of each segment 91, 91. A rubber material 90 fitted so as to protrude from the other is fitted into the other concave portion 92, and on the other hand, as shown in the sectional view of FIG. 14, the segment rings 93, 93 formed as shown in FIG. Is achieved by tightening a nut 97 with an arc segment bolt 96 formed in each of the insides of both segments and inserted into an arc hole 95 communicating with each other. In this case, the elasticity of the rubber material 90 allows the sliding between the abutting surfaces, which are joint surfaces of the segment rings, to achieve stress distribution. Are known.

[0003]

However, in the segment joining technique using one of the joint fittings described above, it is difficult to make the joint holes communicate with each other, and the shear generated in the joint after the segment joining by the joint fitting is difficult. When the friction between the joint surfaces cannot completely counteract the force, slipping occurs on the joint surface, excessive stress occurs around the segment ring bolt, and cracks and peeling of concrete occur on the segment body In addition, since the connection between the segment rings is based on the fitting of the preformed concave tenon and convex tenon, not only the above-mentioned shear force exerts adverse effects on at least both tenons, but also The concave / convex shape of the tenon is a factor that increases the manufacturing cost of the tenoned segment due to the need for expensive formwork. You have me.

Further, in the segment joining technique in which the other rubber material is interposed, the rubber material that is fitted and held is broken while being detached from the concave portion, and cannot withstand the generated shearing force. Excessive stress may adversely affect the segment body, and the bolts and the holes for inserting the bolts may be arc-shaped, or the concave portions may be formed, so that a complicated-shaped formwork is required and the same as above. Boosts the cost of manufacturing bolts and segments.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and uses a glass fiber reinforced plastic joint which is preformed to provide a reinforced concrete segment body and a glass fiber reinforced plastic. Segment glass that reduces stress concentration on fittings, prevents damage to fittings during construction, ensures the safety of tunnels after construction, and reduces the manufacturing cost by simplifying the form of the formwork. It is an object of the present invention to provide a fiber-reinforced plastic joint structure, a fitting and a method for producing a segment.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a semicircular shape formed by a glass fiber reinforced plastic fitting which is embedded and integrally molded on each joint face of a reinforced concrete segment for a shield tunnel. Glass fiber having a structure in which each of the convex ridges and the semicircular concave ridges is provided, and the concave and convex ridges are fitted to each other or are not easily separated from the segment. A reinforced concrete joint for a shield tunnel can be inexpensively manufactured by a manufacturing method in which a shear force acting on a joint portion is counteracted by a reinforced plastic joint, and a joint made of glass fiber reinforced plastic is embedded and integrally molded.

The concrete solution of the present invention is as follows.

(1) Each joint surface of a reinforced concrete segment for a shield tunnel having a joint structure connected to each other by bolts or the like, a semicircular concave portion extending partially in the longitudinal direction of the joint surface, It has a shape extending partially in the longitudinal direction of the joint surface, and is provided with semicircular ridges formed by a glass fiber reinforced plastic joint which is embedded and integrally molded in advance. A glass fiber reinforced plastic joint structure of a reinforced concrete segment that transmits shear force acting on a joint part by fitting parts together.

(2) Each joint surface of a reinforced concrete segment for a shield tunnel having a joint structure connected to each other by bolts or the like partially extends in the longitudinal direction of the joint surface, and at least the inner surface is glass fiber reinforced. A semicircular concave portion covered with a plastic material, and a shape extending partially in the longitudinal direction of the joint surface, and a semicircular shape formed by a glass fiber reinforced plastic joint which is embedded and integrally molded in advance. A ridge is provided,
By fitting these concave ridges and convex ridges to each other,
Glass fiber reinforced plastic joint structure of reinforced concrete segments that transmits shear force acting on joints.

(3) Each joint surface of a reinforced concrete segment for a shield tunnel having a joint structure connected to each other by bolts or the like partially extends in the longitudinal direction of the joint surface and is expanded inward from the opening. And a convex ridge formed by a glass fiber reinforced plastic fitting which has a shape partially extending in the longitudinal direction of the joint surface and is preliminarily embedded and integrally molded. When the convex ridge is fitted into the concave ridge, the convex ridge recovers in the concave ridge by elastic recovery force and is fitted and connected to each other to transmit a shear force acting on the joint. Segment glass fiber reinforced plastic joint structure.

(4) Each joint surface in a reinforced concrete segment for a shield tunnel having a joint structure connected by bolts or the like partially extends in the longitudinal direction of the joint surface, and at least the inner surface is made of a glass fiber reinforced plastic material. And a concave ridge having a cross-sectional shape expanded inward from the opening, and a shape partially extending in the longitudinal direction of the joint surface, and made of glass fiber reinforced plastic which is embedded and integrally molded in advance. A convex ridge formed by a joint is provided, and when the convex ridge is fitted into the concave ridge, the glass fiber reinforced plastic material of the convex ridge recovers in the concave ridge by elastic recovery force. The convex ridge portion is fitted and coupled to the concave ridge portion to transmit a shearing force acting on the joint portion. Hand structure.

(5) In the reinforced concrete segment, the front end of the plate-like body which gradually increases in thickness from the rear end where the protruding ridge portion extending parallel to the longitudinal direction of the joint surface is formed has a half section. A glass fiber reinforced plastic joint made of a reinforced concrete segment having a circular protruding portion and having a shape formed with a hole between the front end and the rear end of the plate-like body.

(6) In the reinforced concrete segment, the front end of the plate-like body which gradually increases in thickness from the rear end where the protruding portion extending parallel to the longitudinal direction of the joint surface is formed has a half cross section. It is a shape in which a circular convex portion is formed, and a hole is formed between the front end and the rear end of the plate-like body, and a flange portion is erected near the semicircular convex portion. Glass fiber reinforced plastic fittings in reinforced concrete segments.

(7) The joint provided with the fitting ridge is made of glass fiber reinforced plastic in advance, and the glass fiber reinforced plastic fitting or the like is used at the time of manufacturing a reinforced concrete segment having the fitting ridge. A method for manufacturing a reinforced concrete segment that is embedded in concrete and integrally formed with concrete.

According to the solution of the present invention, the concentration of stress on the reinforced concrete segment body and the glass fiber reinforced plastic joint is reduced, the joint is prevented from being damaged during construction, and the tunnel after construction is constructed. The safety of the part is ensured, the shape of the formwork is simplified, and the production cost of the reinforced concrete segment can be reduced, and the manufacturability and workability of the segment can be improved.

[0016]

Embodiments of the present invention will be described with reference to the drawings. 1 to 9 relate to a reinforced concrete segment used for a shield tunnel, and are views showing an example for carrying out the present invention.

First, referring to FIG. 1, which is an overall perspective view of a segment in which a fitting is embedded and integrally formed using a mold, reference numeral 1 denotes an example of a reinforced concrete segment used in the present invention. It has two inter-segment joint surfaces 1a, 1a and two inter-segment ring joint surfaces 1b, 1b, and is formed in an arc shape between the two inter-segment joint surfaces 1a, 1a. 1a has segment nut holes 4, 4 to which segment bolt tightening nuts (not shown) are fixed, and partially extends in the longitudinal direction thereof. At least the inner surface is covered with a glass fiber reinforced plastic material. A semicircular concave ridge portion 3, and a segment nut hole 4 in which a segment bolt tightening nut is fixedly mounted,
4 and a semi-circular ridge 2a formed by a glass fiber reinforced plastic fitting 2 which is partially extended in the longitudinal direction thereof and is preliminarily embedded and integrally formed. One of the joint surfaces 1b, 1b is provided with through holes 23, 23 for segment ring bolts and semicircular concave portions 6, 6 extending partially in the longitudinal direction thereof, and the other is provided with a nut for tightening segment ring bolts. Semicircular ridges formed by fixedly provided segment ring nut holes 7, 7 and a fitting 5 made of glass fiber reinforced plastic which is partially extended in the longitudinal direction thereof and is preliminarily embedded and integrally formed. Parts 5a and 5a are provided. A groove 8 is provided on each joint surface, and a seal member 9 is attached.

FIG. 2 is a sectional view showing a fitted state of the glass fiber reinforced plastic joint 2 when the segments 1 and 1 are connected in a ring shape, and is shown between the two inter-segment joint surfaces 1a and 1a. The seal member 9 for preventing water leakage is fixed, and at least the inner surface of the protruding ridge portion 2a, which is the distal end portion of the glass fiber reinforced plastic fitting 2 previously embedded and integrally molded, is covered with the glass fiber reinforced plastic material 3a. Concave portion 3 of the other inter-segment joint surface 1a
It is used as a guide for connecting the segments to counter the shearing force generated by fitting into the groove.

FIG. 3 shows segments 1 and 1 shown in FIG.
FIG. 3 is a cross-sectional view showing a state in which a sealing member 9 for preventing water leakage is fixed between the two inter-segment joint surfaces 1 a, 1 a, and a segment nut hole 14 formed in one of the segments 1. The segment bolts 11 are screwed to the inner segment bolt tightening nuts 12 through the bolt box 15 formed in the other segment 1 and the segment bolt through holes 13 to tighten the segments 1 and 1 together.

FIG. 4 shows a segment ring 20, formed by a tight connection of the segments 1, 1 as shown in FIG.
FIG. 5 is a cross-sectional view showing a fitting state of the glass fiber reinforced plastic joint device 5 when the joint member 20 is connected, and a seal member 9 for preventing water leakage is fixed between two joint surfaces 20a between the segment rings. The shear force generated when the convex ridge 5a, which is the tip of the glass fiber reinforced plastic joint tool 5 previously embedded and integrally molded, fits into the concave ridge 6 of the other segment ring joint surface 20a. Against.

FIG. 5 shows segment 1, as shown in FIG.
Segment rings 20, 20 formed by one tightening connection
FIG. 3 is a cross-sectional view showing a state in which the sealing members 9 are tightly connected to each other, and a seal member 9 for preventing water leakage is fixed between two joint surfaces between segment rings 20a, 20a; Nut hole 2
The bolt box 25 formed on the other segment ring 20 is attached to the segment ring bolt tightening nut 22 in 4.
And the segment ring bolt 21 is screwed into the segment ring bolt through the through hole 23 for the segment ring bolt.
0 and 20 are tightly connected to each other.

FIG. 6 is a cross-sectional view showing another joint structure different from the joint structure shown in FIGS. 1 to 5, and shows a joint made of glass fiber reinforced plastic when the segments 30, 30 are connected in a ring shape. The fitting state of the tool 31 is shown, and a seal member 9 for preventing water leakage is fixed between the two inter-segment joint surfaces 30a, 30a, and partially in the longitudinal direction of the joint surface 30a. A concave ridge portion 32 having a cross-sectional shape extending at least on the inner surface thereof and covered with a glass fiber reinforced plastic material 32a and expanding inward from an opening 32b, and a shape partially extending in the longitudinal direction of the joint surface 30a. And a ridge 31a formed by a glass fiber reinforced plastic fitting 31 preliminarily embedded and integrally formed.
When 1a is inserted into the concave ridge portion 32 from the opening 32b, the convex ridge portion 31a recovers in the concave ridge portion 32 due to its own elastic recovery force, and the convex ridge portion is fixed to the concave ridge portion. It is fitted and connected to the portion 32 to transmit the shear force acting on the joint portion. Coating the inner surface of the concave portion 32 with the glass fiber reinforced plastic material 32a can receive the shearing force together with the joint member 31 to further prevent the concave line portion 32 from being damaged at the time of construction, and damage the joint member 31. The joint surface 30a in the vicinity of the opening 32b of the concave streak 32 is covered with the glass fiber reinforced plastic material 32a.
In this case, the inner surface of the concave portion 32 is generally not covered with the glass fiber reinforced plastic material 32a, so that the glass fiber reinforced plastic coupling tool 31 can be prevented. Even if only the fitting connection is made, it can sufficiently resist the shearing force.

FIG. 7 is a perspective view of an example of a glass fiber reinforced plastic fitting applied to the joint structure shown in FIGS. 1, 2, 4, and 6. 31 is a ridge 2b, 5b, 31b at its rear end extending parallel to the longitudinal direction of the joint surface in the segment.
Comprising a plate-shaped portion from the rear end to the middle portion, comprising a plate-shaped portion gradually thicker from the middle portion toward the front, and the front end of the plate-shaped portion is semicircular in cross section Ridge 2
a, 5a, 31a, and has a shape in which holes 2c, 5c, 31c are formed between the front end and the rear end of the plate-like body, and the protruding ridges 2b, 5b, 31b at the rear end and The holes 2c, 5c, 31c formed between the front end and the rear end serve to strengthen the embedding of the fitting. In addition, glass fiber reinforced plastics, which are flexible, rich in workability, lightweight, and have high elastic recovery compared to metal materials, have a large function of dispersing shear force and are easy to manufacture articles. When applied to, the weight of the entire segment can be reduced, and it is most suitable as a material for joints of reinforced concrete segments.

FIG. 8 is a perspective view of another example of a glass fiber reinforced plastic joint applied to the joint structure shown in FIGS. 1, 2 and 4, and is similar to the joint shown in FIG. In addition to having a structure, it has a shape in which flanges 2d, 5d are provided upright in the vicinity of the semicircular ridges 2a, 5a, and protects a fixing portion of a joint that is easily affected by shearing force. Things.

FIG. 9 is a perspective view of an example of a glass fiber reinforced plastic fitting applied to the fitting structure shown in FIG. 6, and has a structure substantially similar to that of the fitting shown in FIG. The ridge portion 31d is erected on the plate-like portion having a gradually increasing thickness as described above.
And protects the fixing portion of the joint which is easily affected by shearing force after being fitted into the concave ridge portion 32 and joined by its own elastic recovery force.

The reinforced concrete segment 1 shown in FIG. 1 has the glass fiber reinforced plastic fittings in a form provided with holes corresponding in number to the required number of glass fiber reinforced plastic fittings. After positioning the fitting so that the ridge portion faces the hole, concrete is poured and embedded and integrally molded. After steel material as a reinforcing material is also positioned, concrete is poured and embedded and integrally molded. Things.

[0027]

As described above, in the glass fiber reinforced plastic joint structure of the reinforced concrete segment according to the present invention, even if the concave and convex ridges are displaced from each other at the time of connecting the segments, the convex ridges may be displaced. The ridges serve as guides, causing a centering effect to align the centers of the segments and automatically correcting the positions of the segments, facilitating the connection work. In the case of glass fiber reinforced plastic joints, they act on the segments. Since the fitting length of the unevenness can be set freely according to the sectional force, a rational design can be made according to the acting external force. Improvement, simplification of the segment formwork, etc., eliminating the need for anti-corrosion treatment, and improving the manufacturing method of segments that have glass fiber reinforced plastic fittings. However, compared to the case of manufacturing a tenoned segment, the segment manufacturing formwork is simpler, so that the manufacturing cost of the formwork is reduced, and it is possible to reduce the cost of the segment. Can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a reinforced concrete segment of the present invention.

FIG. 2 is a cross-sectional view showing a fitting state of a glass fiber reinforced plastic joint when the segments of the present invention are connected in a ring shape.

FIG. 3 is a cross-sectional view showing a state where the segments shown in FIG. 2 of the present invention are tightly connected.

FIG. 4 is a cross-sectional view showing a fitting state of a glass fiber reinforced plastic fitting when a segment ring of the present invention is connected.

FIG. 5 is a cross-sectional view showing a state in which the segment rings of the present invention are tightly connected.

FIG. 6 is a sectional view showing another joint structure of the present invention shown in FIGS. 2 and 4;

FIG. 7 is a perspective view of an example of the glass fiber reinforced plastic joint device of the present invention.

FIG. 8 is a perspective view of another example of the glass fiber reinforced plastic fitting of the present invention shown in FIG. 7;

FIG. 9 is a perspective view of another example of the glass fiber reinforced plastic joint of the present invention shown in FIGS. 7 and 8;

FIG. 10 is a perspective view showing a lining in a conventional shield tunnel.

FIG. 11 is a cross-sectional view showing a conventional state of connection between segments.

FIG. 12 is a cross-sectional view showing a state in which conventional tenon segments are connected to each other.

FIG. 13 is a cross-sectional view showing a state in which segments are connected to each other with a rubber material interposed between conventional joint surfaces.

FIG. 14 is a cross-sectional view showing a state where an arc-shaped ring bolt is applied to an arc-shaped hole of a conventional segment ring.

[Explanation of symbols]

1, 30 Reinforced concrete segment 1a, 1b, 20a, 30a Segment joint surface 2, 5, 31 Glass fiber reinforced plastic joint 2a, 5a, 31a Glass fiber reinforced plastic joint protruding ridge 2b, 5b, 31b Glass fiber reinforced plastic fittings 2, 5, 31 Convex ridges 2c, 5c, 31c Glass fiber reinforced plastic fittings 2, 5, 31 Holes 2d, 5d, 31d Glass fiber reinforced plastic fittings 2, 5, 31 flange strip 3, 6, 32 concave strip 3a, 32a glass fiber reinforced plastic material 4, 14 segment nut hole 7, 24 segment ring nut hole 8 seal groove 9 seal material 11, 21 bolt 12, 22 Nut 13, 23 Bolt through hole 15, 25 Bolt box 20 Segment ring 32b Concave Opening of the strip 32

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Shoji Kawamura, 1-3-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Hiroshi Matsuura 1-3-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Shuji Kuraki 4-12-20 Nihonbashi Honcho, Chuo-ku, Tokyo Sato Industry Co., Ltd. (72) Inventor Sadao Kimura 4-12-20 Nihonbashi Honcho, Chuo-ku, Tokyo Sato Industrial Co., Ltd.

Claims (7)

[Claims] 1. A semicircular concave portion extending partially in a longitudinal direction of a joint surface of each joint surface of a reinforced concrete segment for a shield tunnel having a joint structure connected to each other by bolts or the like; A semi-circular ridge formed by a glass fiber reinforced plastic fitting which is embedded and integrally molded in advance, and provided with these concave ridges and convex ridges. A glass fiber reinforced plastic joint structure made of reinforced concrete segments, characterized by transmitting a shearing force acting on the joint portion by fitting the joints with each other. 2. A joint structure in a reinforced concrete segment for a shield tunnel having a joint structure connected to each other by bolts or the like. Each joint surface partially extends in the longitudinal direction of the joint surface, and at least the inner surface is made of glass fiber reinforced plastic. Semicircular concave portion covered with a material, and a semicircular convex formed by a glass fiber reinforced plastic fitting which has a shape extending partially in the longitudinal direction of the joint surface and is preliminarily embedded and integrally molded. A joint structure made of a glass fiber reinforced plastic segment of a reinforced concrete segment, characterized by transmitting a shear force acting on the joint by fitting the concave and convex with each other. 3. Each of the joint surfaces of a reinforced concrete segment for a shield tunnel having a joint structure connected to each other by bolts or the like extends partially in the longitudinal direction of the joint surface and is expanded inward from the opening. A concave ridge having a cross-sectional shape and a convex ridge formed by a glass fiber reinforced plastic fitting that is a shape that partially extends in a longitudinal direction of the joint surface and that is embedded and integrally molded in advance is provided. When the convex ridge is fitted into the concave ridge, the convex ridge recovers in the concave ridge by elastic recovery force and is fitted and connected to each other to transmit a shear force acting on the joint. Glass fiber reinforced plastic joint structure with reinforced concrete segments. 4. Each joint surface of a reinforced concrete segment for a shield tunnel having a joint structure connected to each other by bolts or the like partially extends in the longitudinal direction of the joint surface, and at least the inner surface is made of a glass fiber reinforced plastic material. A concave and ridged portion having a cross-sectional shape that is covered and expanded inward from the opening, and a glass fiber reinforced plastic joint that is partially embedded and integrally molded in advance in the longitudinal direction of the joint surface And a convex ridge formed by a tool is provided, and when the convex ridge is fitted into the concave ridge, the glass fiber reinforced plastic material of the convex ridge recovers in the concave ridge by elastic recovery force. The convex ridge portion is fitted and coupled to the concave ridge portion to transmit a shearing force acting on a joint portion. Stick joint structure. 5. A front end of a plate-like body which gradually increases in thickness from a rear end formed with a ridge extending in parallel with a longitudinal direction of a joint surface in a reinforced concrete segment and has a semicircular cross section. A glass fiber reinforced plastic joint made of a reinforced concrete segment, characterized in that it has a shape with a ridge and a hole formed between the front end and the rear end of the plate-like body. 6. A front end of a plate-like body which gradually increases in thickness from a rear end formed with a ridge extending parallel to a longitudinal direction of a joint surface in a reinforced concrete segment and has a semicircular cross section. And a shape in which a hole is formed between the front end and the rear end of the plate-like body, and a flange is provided in the vicinity of the semicircular ridge. A glass fiber reinforced plastic fitting having a reinforced concrete segment. 7. A joint having a fitting ridge is made of glass fiber reinforced plastic in advance, and the glass fiber reinforced plastic joint or the like is made of concrete when a reinforced concrete segment having a fitting ridge is manufactured. A method for manufacturing a reinforced concrete segment, wherein the reinforced concrete segment is embedded in and molded integrally with concrete.