JP2017110424A - Segment joint and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment joint which can easily connect adjacent segments in a circumferential direction, and in which the connection of the segments is not easily released even if an external force acts in a direction in which the segments are separated from each other, and its manufacturing method.SOLUTION: A segment joint is constituted of a male joint 20 and a female joint 10, the female joint 10 has a main body part which is constituted by overlapping a pair of halved parts having symmetric shapes on each other, end parts of the halved parts of the main body part of the female joint 10 comprise hook-shaped portions which are formed into L-shapes at cross sections having bent parts, a tip part (T-shape in cross section) at an end part of the main body part of the male joint 20 at the female joint side is formed into a complementary shape complementing with a region R between a pair of the hook-shaped portions at the main body part of the female joint 10, and tapers are formed at the hook-shaped portions of the female joint 10 and the tip part of the male joint 20. The male joint 20 and the female joint 10 are forged products.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a technique for connecting segments used in tunnel lining and the like, and more particularly to a technique for connecting adjacent segments in the tunnel circumferential direction.

In tunnel lining, an annular liner is arranged on the inner wall surface of the excavation hole to prevent the excavation hole from collapsing. The annular liner is configured by connecting a plurality of segments in the circumferential direction.
In tunnel lining, an annular liner is arranged on the inner wall of the excavation hole by connecting segments adjacent in the circumferential direction. The excavation hole (or tunnel) extends, and adjacent annular liners are connected in the longitudinal direction of the excavation hole (tunnel).

When connecting segments in the tunnel circumferential direction, connect the female joint to one segment to be connected, the male joint to the other segment, and insert a part of the male joint into the female joint to connect the segments together. doing.
FIG. 29 shows an example of a conventional joint used to connect segments in the circumferential direction.
In FIG. 29, the female joint 30 includes a pair of plate-shaped female joint side long plates 31 that are arranged to face each other at a constant interval, and a plate-shaped connecting member 32 is passed between the pair of female joint side long plates 31. It is fixed by welding (welded part W1, upper and lower two places).

Although not shown in FIG. 29, the female joint 30 and the male joint 40 are embedded in adjacent segments.
In the female joint 30, a corner member 33 extending in a direction perpendicular to the paper surface of FIG. 29 is arranged on the inner surface of the end of the male joint 40 side of the pair of plate-shaped female joint side long plates 31. The square member 33 is welded to the female joint side long plate 31 (welded portion W2). Then, a space R30 is formed by the pair of female joint side long plates 31 and the pair of corner members 33 (enclosed by the pair of female joint side long plates 31 and the pair of corner members 33).
A steel bar (for example, a deformed steel bar) is provided on each outer surface (surface opposite to the surface to which the corner member 33 is fixed) at the end of the pair of female joint-side long plates 31 on the side separated from the male joint 40. The anchor 34 constituted by is fixed by welding (welded portion W3).

The male joint 40 has a male joint side long plate 41. On both side surfaces of the male joint side long plate 41 in the vicinity of the end of the female joint 30, side members 42 extending in a direction perpendicular to the plane of FIG. It is welded (welded portion W4) and fixed, and therefore, the male joint side engagement portion Y is formed at the end of the male joint 40 on the female joint 30 side.
An anchor 43 made of a steel rod (for example, a deformed steel rod) is fixed by welding (welded portion W5) on the both sides of the male joint side long plate 41 on the side away from the female joint 30 and in the vicinity of the end portion.
In FIG. 29, when the male joint side engagement portion Y formed at the end of the male joint 40 on the female joint 30 side is fitted into the region R30 of the female joint 30, the male joint 40 and the female joint 30 are connected to each other. The segments in which the joint 40 and the female joint 30 are embedded (segments adjacent in the tunnel circumferential direction) are connected to each other.

As shown in FIG. 30, the corner member 42 in the engagement (connection) portion of the male joint 40 and the corner member 33 in the engagement (connection) portion of the female joint 30 are so-called “one-side welding”, so that the strength is not sufficient. .
Therefore, in the conventional segment as shown in FIG. 29, since a plurality of members are connected by welding, a large tensile force F in the circumferential direction of the liner (see FIG. 30: acts in the left-right direction in FIG. 29). When the tensile force is applied, the corner member 42 and the corner member 33 are separated from the end of the male joint side long plate 41 or the female joint side long plate 31 from the side of the male joint side long plate 41 or the female joint side length. It will peel from the board 31, and will be in a so-called "raised" state. If it will be in the state shown in FIG. 30, there exists a possibility that engagement of the male joint 40 and the female joint 30 may be cancelled | released.
Therefore, there is a demand for a segment joint in which segments adjacent in the circumferential direction can be easily connected, and the connection between the segments is not easily released even if an external force acts in the direction of separating the segments. However, such a joint has not yet been proposed.

As another conventional technique, a technique has been proposed in which segments are connected by inserting a male joint having an L-shaped section into a female joint having a rectangular section (see Patent Document 1).
However, in the related art (Patent Document 1), when an external force acting in a direction to separate the segments is applied, the male joint is easily deformed to come out of the female joint and the connection between the segments is released. Exists.

Japanese Patent Laid-Open No. 8-232585

  The present invention has been proposed in view of the above-described problems of the prior art, and can easily connect segments adjacent in the circumferential direction, and an external force acts in the direction of separating the segments. However, an object of the present invention is to provide a segment joint in which the connection between the segments is not easily released, and a manufacturing method thereof.

The segment joint (100) of the present invention comprises a male joint (20) and a female joint (10).
The female joint (10) has a main body (1) portion formed by superposing a pair of symmetrical halves (1-1),
The end of the half part (1-1, 1-2) of the main body (1) of the female joint (10) (the end on the side that engages with the male joint) has an L-shaped cross section having a bent portion. It has a bowl-shaped part (1-1A, 1-2A),
The tip (2H: section having a T-shaped cross section) at the female joint side end of the main body (2) of the male joint (20) is a pair of hook-shaped parts (1) in the main body (1) of the female joint (10). -1A, 1-2A) is complementary to the region (R),
A taper is formed in the arrow V direction on the flange-shaped part (1-1A, 1-2A) of the female joint (10) and the T-shaped part (2H) of the male joint (20).
The male joint (20) and the female joint (10) are forged products (members formed by die-cut forging).

In the joint (100) of the present invention, it is preferable that the angle of the bent portion in the flanged portion (1-1A, 1-2A) of the female joint (10) is smaller than 90 °. However, the angle of the bent portion can be 90 °.
Further, a groove (1H) having a T-shaped cross section is formed on the opposite side of the flange portion (1-1A, 1-2A) of the main body (1) of the female joint (10), and the groove (1H) It is possible to fix a substantially T-shaped anchor attachment portion (3) having a tip portion (3H) having a complementary cross-sectional shape.
And the rod-shaped member (4: For example, a deformed steel bar and a bolt) by which the unevenness | corrugation was formed in the surface can be fixed to the said anchor attachment part (3). Alternatively, a flat fixing member can be provided.

  Alternatively, in the joint of the present invention, the flange-shaped portions (1-1GA, 1-2GA) on the male joint side (arrow 20G side) of the halved parts (1-1G, 1-2G) of the female joint are outside (opposed). Opposite side of halved parts: Arrow-shaped part extensions (1-1GAE, 1-2GAE) extending on arrow RO side, arrow LO side, and half parts (1-1G, 1-2G) Reinforcing ribs (1-1GR, 1-2GR) are preferably formed on the surface of the outer side (opposite side of the opposed half parts: arrow RO side, arrow LO side).

  The method of manufacturing the segment joint (100) according to the present invention includes a half part (1-1, 1-2: for example, the member shown in FIG. 2 or FIG. Is a step of die-forging the halved parts (1-1, 1-2) using a mold having a complementary shape and a complementary shape, and a body portion (for example, shown in FIG. 3) of a male joint (20) ( 2) The step of die-forging the main body (2) of the male joint (20) using a mold complementary to the die and the die-forged halved parts (1-1, 1-2) are (grooved) (D) characterized in that it includes a welding step.

  In the method for manufacturing a segment joint (100) of the present invention, a step of die-forging the anchor attachment portion (3) using a mold complementary to the anchor attachment portion (3), and a cross-sectional T-shape at the tip of the anchor attachment portion A step of inserting the portion (3H) into the fitting groove (1H) opposite to the flange-shaped portion (1-1A, 1-2A) of the main body (1), and after insertion, ) It is possible to include a step of welding the section T-shaped portion (3H) and the fitting groove (1H) (on the side opposite to the flange-shaped portions 1-1A, 1-2A of the main body 1). .

According to the present invention having the above-described configuration, the end portions (1-1A, 1-2A: 鉤 on the side of the body portion (1) of the female joint (10) of FIG. 1 that engage with the male joint (20). 3 is composed of a pair of portions having an L-shaped cross section, and a distal end portion (2H: T-shaped cross section) of the body joint side end portion of the main body portion (2) of the male joint (20) in FIG. Part), and the taper-shaped part (1-1A, 1-2A) of the female joint (10) and the T-shaped part (2H) of the male joint are tapered in the arrow V direction. Is formed. Therefore, when the male joint (20) and the female joint (10) are connected (engaged), the cross-section T-shaped of the male joint (20) is connected to the flanged portion (1-1A, 1-2A) of the female joint (10). Shaped part (2H) is easily inserted.
Therefore, according to the segment joint (100) of the present invention, the male joint (20) is inserted by inserting the distal end (2H) into the flanged portion (1-1A, 1-2A) of the female joint (10). Since the joint (20) can be engaged with the female joint (10), the segment in which the male joint (20) is embedded and the segment in which the female joint (10) is embedded can be easily (so-called “one-touch”). It can be connected.

And since the male joint (20) and female joint (10) which comprise the segment joint (100) of this invention are integrally molded by die-cut forging, the conventional joint which has many welding parts (FIG. 29, FIG. 30) and the strength is improved as compared with a cast product.
Therefore, the male joint (20) and the female joint (10) are deformed even if an external force (external force that releases the engaged male joint and female joint) is applied to the circumferentially adjacent segments. Therefore, it is possible to prevent the adjacent segments from being detached.

  In the present invention, if the angle of the bent portion in the flanged portion (1-1A, 1-2A) is set to an angle smaller than 90 °, the external force for disengaging the male joint (20) and the female joint (10). Even if the action acts, it is possible to prevent the flange-shaped portion (1-1A, 1-2A) of the female joint (10) from being deformed to increase (open) the gap on the male joint side. This further prevents the engagement between the female joint (10) and the male joint (20) from being released.

The segment joint (100) of the present invention can be applied regardless of the type of segment.
That is, if it is a concrete segment, the anchor attachment part (3) of the female joint (10) or the main body part (1) and the main body part (2) of the male joint (20) are anchored by, for example, steel bars (4: deformed steel bars). Can be attached.
In addition, if the outer surface (circumferential outer surface in the radial direction of the segment) and the connecting surface (to the adjacent segment) are provided with steel plates and are filled with concrete (so-called “concrete filling segment”) The fixing member (5: is attached to the end of the female joint (10) on the side separated from the male joint (20) and the end of the male joint (20) on the side separated from the female joint. A plate-like fixing member) may be fixed.
Furthermore, if it is a steel segment, the main body part (1) of the female joint (10) and the main body part (2) of the male joint (20) are welded to the steel plate at the connecting surface (to the adjacent segment) of the steel segment. It ’s fine.

Therefore, according to the segment joint (100) of the present invention, it is not necessary to prepare each segment type, and the number of parts is reduced, so that parts management is facilitated.
And since there is no need to prepare for each segment type, assortment with various dimensions changed corresponding to the expected external force becomes possible, so there is a risk of insufficient strength or use joints with excessive strength There is no risk of doing so.

It is a perspective view which shows the female joint in 1st Embodiment of this invention. It is a perspective view which shows the half component before the welding of the main-body part of the female joint in 1st Embodiment. It is a perspective view which shows the male joint in 1st Embodiment. It is explanatory drawing which shows the state in which the male coupling and female coupling in 1st Embodiment were engaged. It is explanatory sectional drawing which shows the connection part of the segment connected by the female joint and male joint of 1st Embodiment. It is explanatory drawing which shows the end surface of the concrete segment by which each of the female joint of 1st Embodiment and the male joint was embed | buried. It is explanatory drawing of the aspect to which the concrete segment shown in FIG. 6 is connected. FIG. 7 is an explanatory view showing an end face of a concrete segment embedded in a manner different from that shown in FIG. 6 in each of the female joint and the male joint of the first embodiment. It is explanatory drawing which shows the state just before the male coupling and female coupling in 1st Embodiment engage. FIG. 10 is an enlarged partial perspective view of FIG. 9. It is explanatory drawing which shows the state just before the male joint and female joint in a 1st modification of 1st Embodiment engage. FIG. 12 is an enlarged partial perspective view of FIG. 11. It is a perspective view which shows the female joint in the 2nd modification of 1st Embodiment. It is a perspective view which shows the male joint in the 2nd modification of 1st Embodiment. It is explanatory drawing which shows the state by which the male joint and female joint in the 2nd modification of 1st Embodiment were engaged. It is a perspective view which shows the female joint in 2nd Embodiment of this invention. It is a perspective view which shows the male joint in 2nd Embodiment. It is explanatory drawing which shows the state by which the male coupling and female coupling in 2nd Embodiment were engaged. It is explanatory sectional drawing which shows the connection part of the segment connected by the female joint and male joint of 2nd Embodiment. It is a perspective view which shows the female joint in 3rd Embodiment of this invention. It is a perspective view which shows the half component before the welding of the main-body part of the female joint in 3rd Embodiment. It is explanatory drawing which shows the state in which the male coupling and female coupling in 3rd Embodiment were engaged. It is explanatory sectional drawing which shows the connection part of the segment connected by the female joint and male joint of 3rd Embodiment. It is a perspective view which shows the female joint in 4th Embodiment of this invention. It is explanatory drawing which shows the state by which the male coupling and female coupling in 4th Embodiment were engaged. It is a perspective view which shows the principal part of the female joint in 5th Embodiment of this invention. It is explanatory drawing which shows the state in which a bending moment acts on the female joint in 1st Embodiment. It is explanatory drawing which shows the state which a bending moment acts on the female joint in 5th Embodiment. It is explanatory drawing which shows an example of the coupling of a prior art. It is explanatory drawing which shows the problem of the coupling of the prior art shown in FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, a first embodiment of the present invention will be described with reference to FIGS.
A joint 100 according to the first embodiment of the present invention includes a female joint 10 shown in FIG. 1 and a male joint 20 shown in FIG.
In FIG. 1, a female joint 10 includes a main body 1, an anchor mounting portion 3, and an anchor 4 (for example, a deformed steel bar) fixed (for example, welded) to the anchor mounting portion 3. The main body 1 has a half part 1-1 shown in FIG. 2 (a half part shown in FIG. 2) and a symmetrical half part 1-2 shown in FIG. 2 (the opposite of the half part 1-1 shown in FIG. 2). Side half part) and the groove part 1I.
In the halved component 1-1 shown in FIG. 2, a hook-shaped portion 1-1A having an L-shaped section having a bent portion is formed at the end portion on the side (left side in FIG. 2) that engages with the male joint 20. A groove 1-1B is formed in the vicinity of the end on the opposite side (right side in FIG. 2) of the hook-shaped portion 1-1A.

At the center in the longitudinal direction of the halved component 1-1 shown in FIG. 2, a central flat plate portion 1-1C that comes into contact with the halved component 1-2 when coupled with the halved component 1-2 on the opposite side of FIG. And a notch 1-1D is formed at the upper and lower ends of the central flat plate portion 1-1C. That is, the central flat plate portion 1-1C serves as a coupling surface between the half component 1-1 and the half component 1-2.
The cutout portion 1-1D of the central flat plate portion 1-1C includes the central flat plate portion 1-1C of the half component 1-1 and the central flat plate portion 1-2C of the half component 1-2 (the half component 1-2 side). 1), the grooves 1I (not shown on the halved part 1-2 side) are formed by the notches 1-1D and 1-2D (notches on the half-part 1-2 side) formed on the both edges in the vertical direction in FIG. 1 and 2 show only the upper groove 1I).
A notch 1-1E is also formed at the end of the side that engages with the male joint 20 (left side in FIG. 2), and the notch 1-1E joins the halved parts 1-1 and 1-2 to the main body. 1, when the male joint 20 is engaged with the female joint 10, the function as a guide member that facilitates engagement (or insertion) is exhibited.

The halved component 1-1 has a central axis extending in the lateral direction (left and right in FIG. 2) except for the taper of the hook-shaped portions 1-1A and 1-2A described later. (Not shown).
When the female joint 10 is manufactured, the halved part 1-1 of FIG. 2 and the symmetrical halved part 1-2 (FIG. 1) are faced to each other (contacted by the central flat plate portions 1-1C and 1-2C). In the groove portion 1I (see FIG. 1), the two are welded (the upper surface side and the lower surface side are also welded).

In FIG. 1, the main body 1 is manufactured by welding and joining the halved parts 1-1 and 1-2 with a groove 1I (welded part WA). The end of the main body 1 that engages with the male joint 20 (left side in FIG. 1) is composed of a pair of L-shaped hook-shaped portions 1-1A and 1-2A having bent portions. .
A region R between the pair of hook-shaped portions 1-1A and 1-2A has a shape that is substantially complementary to the distal end portion 2H of the male joint 20 (see FIG. 3). And the front-end | tip part 3H is arrange | positioned at the female joint side edge part of the main-body part 2 of the male joint 20. FIG.

Although not clearly shown in FIG. 1, the hook-shaped portions 1-1 </ b> A and 1-2 </ b> A of the female joint 10 are arranged in the upper direction (the hook-shaped portions 1-1 </ b> A, The taper is such that the thickness (1-2A) is reduced. That is, the flange-shaped inner surfaces 1-1F and 1-2F form a tapered surface. And the corresponding front-end | tip part 2H (front-end | tip part 2H of the main-body part 2 of the male joint 20 of FIG. 3: T-shaped part of a cross section) which engages with hook-shaped part 1-1A, 1-2A has the arrow V direction ( A taper is formed such that the thickness increases in the upward direction in FIG. That is, the inner surface 2HA of the distal end portion 2H is a tapered surface, and the taper of the distal end portion 2H is complementary to the taper of the hook-shaped portions 1-1A, 1-2A, so that both can be easily engaged. ing.
As a result, when engaging (connecting) the joints to be described later, the flanged portion 1- 1 of the female joint 10 in which the distal end portion 2H (part having a T-shaped cross section) of the male joint 20 in FIG. It is easily inserted into the region R between 1A and 1-2A.

Although described later with reference to FIGS. 9 and 10, the angle α (see FIG. 9) of the bent portions of the inner surfaces 1-1F and 1-2F in the flanged portions 1-1A and 1-2A of the female joint 10 is as follows. The angle is set to be smaller than 90 °, for example, 88 to 83 °.
Further, the bending angle α of the inner surface 2HA of the tip 2H (the corresponding tip 2H of the male joint 20 in FIG. 2: a section having a T-shaped cross section) that comes into contact with the flanges 1-1A and 1-2A is also, for example, The angle is set in the range of 88 to 83 °.

In FIG. 1, a groove portion 1H having a T-shaped cross section is formed on the opposite side (right side in FIG. 1) of the main body portion 1 of the female joint 10 to the side engaged with the male joint 20. The groove 1H is also formed by welding the half parts 1-1 and 1-2. Since the groove portion 1H is provided, the main body portion 1 of the female joint 10 can be engaged with an anchor attachment portion 3 having a T-shaped cross section having a tip portion 3H having a cross-sectional shape complementary to the groove portion 1H.
When engaging (fixing) the anchor attachment portion 3 to the main body portion 1, the distal end portion 3H of the anchor attachment portion 3 is fitted into the groove portion 1H (fitting portion) of the main body portion 1 so that the distal end portion 3H of the anchor attachment portion 3 is fitted. (T-shaped section in cross section) and groove 1H (fitting portion) of main body 1 are welded (welded portion WB in FIG. 4: welding on both upper and lower sides in FIG. 4).

In the illustrated first embodiment, a rod-like member 4 (for example, a deformed steel bar or a bolt) having irregularities formed on the surface is fixed (as an anchor) to the anchor mounting portion 3.
When the rod-like member 4 is fixed, for example, the anchor 4 is welded to both side surfaces of the flat plate portion 3I of the anchor mounting portion 3 (welded portion WC).
In addition, the anchor 4 is not limited to the rod-shaped member 4, For example, you may use a flat fixing member.

In FIG. 3, the cross-sectional shape of the distal end portion 2H (the T-shaped section) at the female joint side (right side in FIG. 3) end of the main body 2 of the male joint 20 is the bowl shape of the female joint 10 as described above. A taper is formed so as to be thicker toward the upper side in the direction of arrow V (up and down direction in FIG. 3), and has a shape complementary to the region R between the portions 1-1A and 1-2A. The 2H inner surface 20HA is a tapered surface.
A rod-like member 4 (for example, a deformed steel bar or a bolt) having irregularities formed on the surface is also fixed as an anchor to the main body 2 of the male joint 20.
When the rod-shaped member 4 is fixed, the anchor 4 is welded (welded portion WD) to both side surfaces of the flat plate portion 2I of the male joint main body portion 2.

Although not clearly shown, the half part 1-2 symmetrical with the half part 1-1 shown in FIG. 2, the anchor mounting part 2 shown in FIG. 1, and the main body part 2 of the male joint 20 shown in FIG. Is a forged product integrally formed by a die-cut forging method. Therefore, the strength is very high as compared with a cast product and a joint welded at a plurality of locations (such as the prior art shown in FIGS. 29 and 30).
Therefore, even if the force (external force which tries to separate the segment extended in the circumferential direction) acts to separate the male joint 20 and the female joint 10, the hook-shaped portion 1-1A in the main body 1 of the female joint 10 is applied. 1-2A is deformed (becomes a so-called “open” state as shown in FIG. 30), and the male joint 20 is prevented from being pulled away from the female joint 10.

1 to 4, as described above, the anchor attachment portion 3 of the female joint 10 and the main body portion 2 of the male joint 20 have a rod-like member 4 (for example, a deformed steel rod or Bolt) is welded as an anchor, but the mode of anchor anchoring is not particularly limited to welding.
Further, the anchor is not limited to the rod-like member 4, and a flat plate-like fixing member can also be used.

  In manufacturing the joint 100 according to the first embodiment, the halved parts 1-1 and 1-2 (the member shown in FIG. 2 and the symmetrical member in FIG. 2) of the main body 1 of the female joint 10 have a complementary shape. A step of performing die-forging of the halved parts 1-1 and 1-2 using a die, and a step of die-forging the anchor attachment portion 3 using a die complementary to the anchor attachment portion 3 shown in FIG. Then, a step of die-forging the main body portion 2 of the male joint 20 using a die complementary to the main body portion 2 of the male joint 20 shown in FIG. Then, a step of welding the half-cut parts that have been die-forged (the half-part 1-1 symmetrical with the half-part 1-1 shown in FIG. 2) at the groove 1I is executed.

Furthermore, the step of inserting the tip 3H (section T-shaped portion) of the anchor mounting portion 3 into the fitting portion (groove portion 1H) on the opposite side of the flange-shaped portions 1-1A, 1-2A of the main body portion 1, After the insertion, a step of welding the fitting portion (groove portion 1H) on the opposite side of the cross-section T-shaped portion 3H at the tip of the anchor attachment portion 3 and the flange portions 1-1A and 1-2A of the main body portion 1 is executed. .
And what is necessary is just to perform the process of welding the anchor 4 (bar-shaped member) to the main-body part 2 of the male joint 20, and the anchor attachment part 3. FIG.

As described above, the groove 1I in the main body 1 of the female joint 10 shown in FIG. 1 is formed by die-cut forging halves (the halved part 1-1 shown in FIG. 2 and the symmetric half part shown in FIG. 2). It is a welding location at the time of welding 1-2).
By welding the halved parts 1-1 and 1-2 with the groove 1I, the bead (the rise of the welding trace) is accommodated in the groove 1I and is hardly visible. This eliminates the need to remove the excessive bead portion after welding, thereby improving manufacturing efficiency.

FIG. 4 shows a state where the male joint 20 and the female joint 10 are engaged. In FIG. 4, the main body portion 1 of the female joint 10 is configured by welding the half components together at the groove portion 1 </ b> I (welded portion WA). A tip portion 3H having a T-shaped cross section of the anchor attachment portion 3 is fitted into a groove portion 1H having a T-shaped cross section on the side separated from the male joint 20 of the main body portion 1 (the right side of the main body portion 1). The fitting portion (groove portion H) is fixed by welding (welded portion WB).
On the other hand, on the side (the left side of the main body 1) of the main body 1 of the female joint 10 that engages with the male joint 20, a region R (engagement portion) between the pair of hook-shaped portions 1-1A and 1-2A is provided. Is inserted at the tip 2H (T-shaped section) at the end of the male joint 20 on the female joint side (right side of the main body 2), and the male joint 20 and the female joint 10 are engaged (connected). )

Anchors 4 are secured to both side surfaces of the flat plate portion 3I of the anchor attachment portion 3 of the female joint 10 and both side surfaces of the flat plate portion 2I of the male joint main body portion 2 by welding (welded portions WC and WD). In the illustrated embodiment, two anchors 4 are welded to each other, but the number of anchors 4 and the welding locations are not limited to the illustrated example.
The female joint 10 and the male joint 20 are sufficiently fixed to the segment (for example, the concrete segment in FIG. 5) in which the female joint 10 and the male joint 20 are installed.
In addition, various dimensions, for example, thickness, length, width, etc. of the main part 2 which comprises the half parts 1-1 and 1-2 which comprise the female joint 10, the anchor attachment part 3, and the male joint 20, are required. It is determined according to the design strength. The length, thickness, number, unevenness, etc. of the anchor 4 (bar-shaped member) are also set according to the required design strength.

In the segment joint 100 (male joint 20 and female joint 10) of FIG. 4, as described above, the hook-shaped portions 1-1A and 1-2A, which are fitting portions between the female joint 10 and the male joint 20, and the corresponding male joints 20 are provided. A taper is formed at the tip 2H (portion having a T-shaped cross section) of the main body 2 in the direction of arrow V (the vertical direction in FIGS. 1 and 3).
Therefore, as will be described later with reference to FIGS. 6 and 7, when engaging (connecting) the joint, the distal end portion 2 </ b> H (the T-shaped portion) of the male joint 20 is the bowl-shaped portion of the female joint 10. It is easily inserted into the region R (engagement portion) between 1-1A and 1-2A.

The state of the connecting portion when the segments are connected by the male joint 20 and the female joint 10 shown in FIGS. 1 to 4 is shown in FIG.
The male joint 20 and the female joint 10 shown in FIGS. 1 to 4 are embedded in a concrete segment and used in FIG. FIG. 5 shows a state where the concrete segments in which the male joint 20 and the female joint 10 shown in FIGS. 1 to 4 are embedded are connected to each other.
In FIG. 5, a female joint 10 is embedded in one concrete segment SG1, and a male joint 20 is embedded in a concrete segment SG2 connected to the concrete segment SG1. And the front-end | tip part 2H of the main-body part 2 of the male joint 20 is inserted in the area | region R in the female joint 10, and the male joint 20 and the female joint 10 are engaging (connecting).

The female joint 10 is sufficiently fixed to the concrete segment SG1 via the anchor 4 (bar-shaped member) welded to the anchor mounting portion 3, and the male joint 20 is connected to the main body portion 2 via the anchor 4 (bar-shaped member). It is sufficiently fixed on the concrete segment SG2.
Therefore, even if the force F pulling from the concrete segments SG1 and SG2 acts on the female joint 10 and the male joint 20, the anchor 4 (rod-like member) is fixed in the concrete, so that the unevenness on the surface of the anchor 4 is resistant to resistance. Thus, the female joint 10 and the male joint 20 are prevented from coming out of the concrete segments SG1 and SG2.

Next, with reference to FIG. 6, FIG. 7, the aspect by which concrete segment SG1 and SG2 in which each of the female joint 10 which concerns on 1st Embodiment and the male joint 20 were embed | buried is connected is demonstrated.
In FIG. 6, a male joint 20 and a female joint 10 are embedded in one row on the connection surface (end surface) SG1F of the concrete segment SG1. And the female joint 10 and the male joint 20 are embed | buried in the row also in connection surface SG2F of concrete segment SG2 which should be connected with concrete segment SG1.

The male joint 20 and the female joint 10 embedded in the concrete segment SG1 are embedded at positions corresponding to the female joint 10 and the male joint 20 embedded in the concrete segment SG2, respectively. In other words, the female joint 10 and the male joint 20 on the concrete segment SG2 side are respectively buried in positions corresponding to the male joint 20 and the female joint 10 on the concrete segment SG1 side.
In FIG. 6, the front end 2H (portion having a T-shaped cross section) of the male joint 20 protrudes from the connection surfaces SG1F and SG2F of the concrete segment in which the male joint 20 is embedded. On the other hand, in the female joint 10, the region R, which is a space formed by the hook-shaped portions 1-1A and 1-2A (FIGS. 1, 2, and 4) that are engaging portions with the male joint 20, It arrange | positions so that it may be located in opening part SG1O or SG2O opened to the connection surface (end surface) of the concrete segment by which a joint is embed | buried.

Here, the taper formed at the distal end 2H of the male joint 20 facilitates the insertion of the distal end 2H of the male joint 20 into the region R of the female joint 10. The same applies to the taper at the engaging portion (region R) of the female joint 10.
In the opening SG1O, the end in the direction (tunnel longitudinal direction) in which the male joint 20 and the female joint 10 form a row extends to the outer edge (the upper left edge in FIG. 6) of the connection surface SG1F of the concrete segment SG1. Reached and opened. And as for opening SG2O, the edge part in the direction (tunnel longitudinal direction) in which the male joint 20 and the female joint 10 comprise the row | line | column is the outer edge part in the connection surface SG2F of concrete segment SG2 (lower left side edge part in FIG. 6). Open up to reach.
The reason why the openings SG1O and SG2O reach and reach the outer edge of the concrete segment is to secure a space for inserting the tip 2H (T-shaped section) of the male joint 20 at the time of connection.

  When connecting the segments as shown in FIG. 6, as shown in FIG. 7, the connection surface SG1F of one of the concrete segments to be connected (for example, the right concrete segment SG1 in FIG. 7) is connected to the other concrete segment SG2. Close to the surface SG2F (the direction indicated by the arrow A1 in FIG. 7), the distal end portion 2H of the male joint 20 (T-shaped section) is the opening of the extension portion of the concrete segment in the counterpart opening SG1O, SG2O. Insert from.

  In this state, if the concrete segment to be connected (for example, the concrete segment SG1) is moved in the longitudinal direction (the direction indicated by the arrow A2 in FIG. 7), as described above, the engaging portion (region R) of the female joint 10 and Since the male joint 20 distal end portion 2H (T-shaped section) is tapered, the male joint 20 distal end portion 2H is easily engaged with the engaging portion (region R) of the main body portion 1 of the female joint 10. Fit (mating).

6 and 7, one female joint 10 and one male joint 20 are embedded in the connection surface (end face) of each segment to be connected. However, as shown in FIG. It is also possible to embed two female joints and two male joints on the connection surface (end surface).
In FIG. 8, male joints 20 and female joints 10 are embedded in two rows in the lateral direction (tunnel longitudinal direction) of the connection surface SG1F on the connection surface SG1F of one concrete segment SG1. And in the connection surface SG2F of the concrete segment SG2 to be connected to the concrete segment SG1, the female joint 10 and the male joint 20 are embedded in two rows in the lateral direction (tunnel longitudinal direction) of the connection surface SG2F.

The outline of embedding the individual female joint 10 and the male joint 20 in the vicinity of the connection surfaces SG1F and SG2F of the concrete segments SG1 and SG2 is the same as described above with reference to FIG.
Further, the outline of connecting the concrete segment SG1 and the concrete segment SG2 by engaging the male joint 20 and the female joint 10 is the same as described above with reference to FIG. 7, and the male joints 20 arranged in two rows. The female joint 10 is aligned with the female joint 10 and the male joint 20 embedded in the other segment, and the connection is made.
In the illustrated embodiment, the number of male joints and female joints used for segment connection can be selected according to the size of the segment to be connected, the construction conditions, the strength of the male joint, the female joint, the size, and the like.

FIG. 9 shows a state where the male joint 20 and the female joint 10 are engaged in the first embodiment.
Unlike the prior art shown in FIG. 29, the portion of the female joint 10 that engages with the male joint 20 does not have a welded portion. In the female joint 10 (female joint 10 according to the illustrated embodiment) shown in FIG. 9, the portion that engages or fits with the male joint 20 is integrally formed by forging. Only 2A is not separated or peeled off from the main body 1, and as shown in FIG. 30, the engaging portion 33 (fitting portion: portions corresponding to the hook-shaped portions 1-1A, 1-2A) of the female joint 30 ) Is in a so-called “open” state, and the male joint 40 is prevented from being detached from the female joint 30.

In FIG. 9, the angle α of the bent portions of the inner surfaces 1-1F and 1-2F in the flanges 1-1A and 1-2A of the female joint 10 is set to an angle smaller than 90 °, and 88 It is set within a range of ° to 83 °. Similarly, the bending angle α of the inner surface 2HA of the distal end portion 2H (portion having a T-shaped cross section) of the main body portion 2 of the corresponding male joint 20 is also set to an angle smaller than 90 °, and is 88 °. It is set within a range of ˜83 °.
As shown in FIG. 10, in the illustrated embodiment, the bending angle α of the hook-shaped portions 1-1A and 1-2A (not shown in FIG. 10) of the female joint 10 is smaller than 90 ° (88 ° to 83). (For example, 85 °), even if the male joint 20 is pulled in the direction of the arrow AP, the hook-shaped portions 1-1A and 1-2A of the female joint 10 are connected to each other via the tip 2H of the male joint 20. The acting force is mainly a force (a force indicated by an arrow AC) for compressing the hook-shaped portions 1-1A and 1-2A, and a component force acting in a direction for deforming (opening) the female joint 10 indicated by an arrow A-O is It is greatly reduced.
Therefore, the hook-shaped portions 1-1A and 1-2A of the female joint 10 are not easily deformed, and are prevented from opening in the direction of the arrow AO, and the male joint 20 is effectively separated from the female joint 10. Is prevented.

According to the first embodiment of the present invention, the end portions 1-1A and 1-2A (the hook-shaped portions) on the side of the body portion 1 of the female joint 10 that engages with the male joint 20 are a pair of L-shaped cross sections. The region R constituted by the hook-shaped portions 1-1A and 1-2A is a tip portion 2H (a portion having a T-shaped cross section at the female joint side end portion of the main body portion 2 of the male joint 20). ) And complementary shape. Therefore, the male joint 20 and the female joint 10 are engaged or connected by inserting (engaging) the distal end portion 2H of the male joint 20 into the region R of the female joint 10.
Here, the flange portions 1-1A and 1-2A of the female joint 10 and the section 2H having a T-shaped cross section of the male joint main body 2 are tapered in the arrow V direction. Therefore, when the male joint 20 and the female joint 10 are connected (engaged), a section 2H having a T-shaped cross section of the male joint 20 is formed in the region R formed by the flange-shaped parts 1-1A and 1-2A of the female joint 10. Is easily inserted. Therefore, according to the segment joint 100 of the first embodiment, since the male joint 20 can be easily engaged with the female joint 10, the segment in which the male joint 20 is embedded and the segment in which the female joint 10 is embedded are so-called. Easy connection with “one touch”.

And since the male joint 20 and the female joint 10 which comprise the segment coupling 100 of 1st Embodiment are integrally molded by die-cutting forging, compared with the conventional coupling and casting products which have many welding parts, Its strength is improved.
Therefore, even if an external force (external force for disengaging the engaged male and female joints) is applied, the male joint 20 and the female joint 10 are not deformed and are adjacent to each other. It is possible to prevent the segment to be disconnected from coming off.

  Further, in the illustrated first embodiment, the angle of the bent portions in the flange portions 1-1A and 1-2A and the angle of the bent portion of the corresponding distal end portion 2H of the male joint 20 are set to an angle smaller than 90 °. Therefore, even if an external force for releasing the engagement between the male joint 20 and the female joint 10 is applied, the hook-shaped portions 1-1A and 1-2A of the female joint 10 are deformed and the interval on the male joint side is increased. (Opening) is prevented. Therefore, the engagement between the female joint 10 and the male joint 20 is not released.

  Further, according to the first embodiment, if the segment is a concrete segment, for example, an anchor 4 made of a steel bar (deformed steel bar) is welded to the anchor mounting portion 3 of the female joint 10 and the main body portion 2 of the male joint 20. Since it is embedded in the concrete, even if force (pulling force) to separate the female joint 10 and the male joint 20 from the concrete segments SG1 and SG2 acts, the unevenness on the surface of the anchor 4 (bar-shaped member) becomes resistance. The female joint 10 and the male joint 20 are prevented from coming out of the concrete segments SG1 and SG2.

11 and 12 show a first modification of the first embodiment.
In the embodiment of FIGS. 1 to 10, as described with reference to FIGS. 9 and 10, the angle α formed by the bent portions 1-1A and 1-2A of the female joint 10 and the male The angle α formed by the bent portion of the distal end portion 2H of the joint main body 2 is set to an angle smaller than 90 ° and is set in the range of 88 ° to 83 °.
On the other hand, in the first modified example shown in FIGS. 11 and 12, the angle β formed by the bent portions 1A-1A and 1A-2A (not shown) of the female joint 10A and the tip of the male joint 20A. The angle β formed by the bent portion of the portion 2AH is set to 90 °.
In other words, in the first modified example of FIGS. 11 and 12, the bending angle β formed by the inner surfaces 1A-1F and 1A-2F in the flange portions 1A-1A and 1A-2A of the female joint 10A is set to 90 °. Similarly, the bending angle β at the inner surface 2AHA of the tip 2AH (portion having a T-shaped cross section) of the corresponding male joint 20A is also set to 90 °.

According to the first modification of FIGS. 11 and 12, the bending angle β in the flange-shaped portions 1A-1A and 1A-2A of the female joint 10A and the angle β of the bending portion of the tip 2AH of the male joint 20A are set. Since it set to 90 degrees, a process becomes easy and the shape of the type | mold used in the forging process of the male joint 20A and the female joint 10A can also be simplified.
Other configurations and operational effects in the first modification of FIGS. 11 and 12 are the same as those of the first embodiment of FIGS.

13 to 15 show a second modification of the first embodiment.
As described above with reference to FIG. 5, the first embodiment of FIGS. 1-10 is applied to a concrete segment. However, it is also possible to apply 1st Embodiment of FIGS. 1-10 with respect to steel segments.
The second modification of FIGS. 13 to 15 relates to a joint applicable to a steel segment, omits the anchor 4 (steel bar) from the male joint 20 and the female joint 10 of FIGS. 1 to 10, and The anchor attachment portion 3 is omitted from the female joint 10.

The female joint 10B shown in FIG. 13 is formed by joining (welding) the halved parts 1-1 and 1-2 (same as the halved parts in FIGS. 1 to 10) to face each other in the same manner as in FIGS. It is manufactured by. The female joint 10B does not include the anchor attachment portion and the anchor as described above, but the other configuration is the same as that of the female joint 10 in the first embodiment shown in FIGS.
The male joint 20B shown in FIG. 14 is obtained by omitting the anchor 4 from the male joint 20 shown in FIGS. 1 to 10, and is similar to the main body 2 of the male joint 10 in the first embodiment shown in FIGS. It is.
FIG. 15 shows a state where the female joint 10B shown in FIG. 13 and the male joint 20B shown in FIG. 14 are engaged (connected).

As will be described later with reference to FIG. 23, the steel segment is not filled with concrete inside, and the circumferential surface (outer peripheral surface) in the radial direction and the connection surface connected to the adjacent segment are made of steel plates. It is composed.
The male joint 20B and the female joint 10B embedded in the vicinity of the connection surface of the steel segment adjacent in the tunnel circumferential direction are fixed to the steel segment by welding to the connection surface SGF of the steel segment.

When manufacturing the segment joint 100B according to the second modified example, the halved parts 1-1, 1-2 (in FIG. 2) of the main body portion 1 of the female joint 10B, as in the first embodiment of FIGS. The step of die-forging the halved parts 1-1 and 1-2 using a die having a shape complementary to the member shown and the symmetrical member in FIG. 2 is performed.
And the process of die-forging the main-body part 2 of the male joint 20B using the type | mold complementary to the male-joint main-body part 2 shown in FIG. 3 is performed.
Further, a step of welding the half-cut parts that have been die-cut forged (the half-part 1-1 shown in FIG. 2 and the symmetrical half-part 1-2 shown in FIG. 2) at the groove portion is performed.

  However, when manufacturing the segment joint 100B according to the second modified example, the step of forging the anchor mounting portion using a die complementary to the anchor mounting portion, and the cross-sectional T-shaped portion at the tip of the anchor mounting portion as the main body A step of inserting into the fitting portion on the opposite side of the hook-shaped portion of the portion, and after insertion, the cross-section T-shaped portion at the tip of the anchor attachment portion and the fitting portion on the opposite side of the hook-shaped portion of the main body portion are welded A process and the process of welding an anchor (steel bar) to a male joint and an anchor attachment part are unnecessary.

In the second modification shown in FIGS. 13 to 15, the female joint 10 </ b> B and the male joint 20 </ b> B are used for the concrete segments in FIGS. 1 to 10 even if the segment type is not a concrete segment but a steel segment. By simply omitting the anchor attachment portion 3 and the anchor 4 (steel bar) from the female joint 10 and the male joint 20, it can be easily handled.
Therefore, it is not necessary to prepare additional parts specific to the steel segment, and the number of parts is reduced, so that parts management becomes easy.
Other configurations and operational effects in the second modification of FIGS. 13 to 15 are the same as those of the first embodiment of FIGS.

Next, a second embodiment of the present invention will be described with reference to FIGS.
A steel rod (for example, a deformed steel rod) with threads or other irregularities is fixed (welded) as an anchor 4 to the male joints 20 and 20A and the female joints 10 and 10A of FIGS. .
On the other hand, in 2nd Embodiment of FIGS. 16-19, it replaces with anchors 4, such as a deformed steel bar, and a plate-shaped fixing member is being fixed to the anchor attachment part of a female joint, and the main-body part of a male joint. Yes.
For the main part of the female joint or the half part constituting the main part, the anchor mounting part, and the main part of the male joint, the same members as those in the first embodiment shown in FIGS. 1 to 12 can be used.

In FIG. 16 which shows the female joint 10C used in 2nd Embodiment, about the main-body part 1 and the anchor attachment part 3 which comprise 10C of female joints, it is the same member as 1st Embodiment (refer FIG. 1, FIG. 2). It is. It is the same as that of 1st Embodiment also about the point by which the main-body part 1 is comprised by joining mutually symmetrical half-parts 1-1 and 1-2 by welding.
However, in the female joint 10 </ b> C, a plate-like fixing member 5 is used instead of the rod-like member 4 (for example, a deformed steel bar or a bolt) of the first embodiment, and the plate-like fixing member 5 is connected to the main body 1 side of the anchor attachment portion 3. It is fixed to the end on the opposite side (right side in FIG. 16). In the center of the plate-like fixing member 5, a V groove 5A is formed in the vertical direction in FIG. 16, and the end of the anchor attachment portion 3 is abutted against the V groove 5A and welded.
Except for using the plate-like fixing member 5 instead of the rod-like member 4 of the first embodiment, the configuration and operational effects of the female joint 10C are the same as those of the first embodiment (FIGS. 1 to 12).

In FIG. 17 showing the male joint 20C used in the second embodiment, the main body 2 of the male joint 20C uses the same member as in the first embodiment (see FIGS. 1 and 2).
Also in the male joint 10C, a plate-like fixing member 5 is used instead of the rod-like member 4 (for example, a deformed steel bar or a bolt) of the first embodiment, and the plate-like fixing member 5 has a T-shaped cross section of the male joint main body 2. Is fixed to the end opposite to the tip 2H (left side in FIG. 17). At the center of the plate-like fixing member 5, a V-groove 5A is formed in the vertical direction, and the end of the male joint body 2 is abutted against the V-groove 5A and welded.
The configuration and operational effects of the male joint 20C other than the use of the plate-like fixing member 4 instead of the rod-like member 3 are the same as those in the first embodiment (FIGS. 1 to 12).

The state in which the male joint 20C and the female joint 10C in the second embodiment are engaged (connected) is shown in FIG.
In FIG. 18, a T-shaped tip section 3H of the anchor attachment section 3 is fitted in a groove section 1H having a T-shaped section opposite to the male joint 20C (right side in FIG. 18) of the main body section 1 of the female joint 10C. The fitting portion between the groove 1H and the tip 3H is welded.
On the side (left side of FIG. 18) of the main body 1 of the female joint 10C that engages with the male joint 20C, as described above with reference to FIG. 1, FIG. 3, and FIG. A tip portion 2H (a T-shaped section) at the end of the female joint side (right side in FIG. 18) of the main body 2 of the male joint 20C is inserted into the region R configured by 1-2A. The male joint 20C and the female joint 10C are engaged (connected).

In addition, a plate-like fixing member 5 is fixed by welding (welded portion WE) to an end portion of the female joint 10C opposite to the main body portion 1 of the anchor attachment portion 3 (right side in FIGS. 16 and 18). Here, the plate-like fixing member 5 is fixed so that the flat surface thereof is orthogonal to the flat plate portion 3I of the anchor attachment portion 3.
Furthermore, the plate-like fixing member 5 is fixed by welding (welded portion WF) to the end portion on the opposite side (left side in FIG. 18) of the tip portion 2H having a T-shaped cross section of the main body portion 2 of the male joint 20C. The plate-like fixing member 5 is fixed so that the flat surface thereof is orthogonal to the flat plate portion 2I of the male joint body portion 2.
By having the plate-like fixing member 5, the female joint 10 </ b> C and the male joint 20 </ b> C according to the second embodiment are sufficiently fixed to the segment in which each is embedded.

As shown in FIG. 19, the female joint 10C and the male joint 20C in the second embodiment have a radially outer surface SGS (outer peripheral surface) and a connection surface SGF (surface in which segments are connected in the circumferential direction). The other part is assumed to be used for the connection of segments filled with concrete (concrete filled steel segments).
In FIG. 19, the female joint 10C and the male joint 20C according to the second embodiment are embedded in the connection surface SGF of the adjacent concrete filling steel segment, and the female joint is connected to the connection surface SGF (boundary) of the adjacent segment. 10C and male joint 20C are engaged (connected).
Although not clearly shown in FIG. 19, a through hole through which the female joint 10C and the male joint 20C pass is formed in the steel plate of the connecting surface SGF of the concrete-filled steel segment where the female joint 10C and the male joint 20C are installed. Is provided.

A plate-like fixing member 5 is welded to the distal end portion of the anchor attachment portion 3 of the female joint 10C and the distal end portion of the main body portion 2 of the male joint 20C.
Therefore, even if the force pulling the male joint 20C and the female joint 10C from the segment acts, the plate-like fixing member 5 becomes a resistance to move in the concrete and inhibits the movement in the concrete, so the male joint 20C and the female joint 10C. Is prevented from slipping out of the segment.

  When manufacturing the joint 100C according to the second embodiment, similarly to the first embodiment, the halved parts 1-1, 1-2 of the female joint main body 1 (the members shown in FIG. 2 and the symmetrical shape of FIG. 2). Member) and a half-shaped part 1-1, 1-2 are die-forged using a complementary shape die, and the anchor attachment portion 3 is die-forged using a complementary shape die with the anchor attachment portion 3. And a step of die-forging the main body portion 2C of the male joint 20C using a mold complementary to the male joint main body portion 2. And the process of welding the half-parts for which die-forging was carried out (half-part 1-1 shown in FIG. 2 and the symmetrical half-part 1-2 of FIG. 2) by a groove part is performed.

Furthermore, the step of inserting the cross-section T-shaped portion 3H at the tip of the anchor attachment portion into the fitting portion 1H located on the opposite side of the flange portions 1-1A and 1-2A of the main body portion 1, and the anchor attachment after the insertion The step of welding the cross-section T-shaped part 3H at the tip of the part and the fitting part 1H on the opposite side to the flanged parts 1-1A and 1-2A of the main body part 1 is executed.
And the process which welds the plate-shaped fixing member 5 to the edge part on the opposite side of the engaging part with the female joint 10C of the male joint 20C, and plate-like in the edge part on the opposite side to the main-body part 1 of the anchor attachment part 3. What is necessary is just to perform the process of welding the fixing member 5. FIG.

According to the second embodiment, the female joint 10C and the male joint 20C are anchored from the female joint 10 and the male joint 20 used in the concrete segment of FIGS. Replacing (steel bar) with the plate-like fixing member 5 makes it possible to easily cope with this.
Therefore, it is not necessary to prepare additional parts peculiar to the concrete filling segment, and the number of parts is reduced, so that parts management becomes easy.
Other configurations and operational effects in the second embodiment of FIGS. 16 to 19 are the same as those of the first embodiment of FIGS.

According to 1st Embodiment and 2nd Embodiment, in addition to the effect by each embodiment mentioned above, the same member is applied about the main-body part of a male joint and a female joint irrespective of the kind of segment to be used. It is possible.
For example, when the male joint 20 and the female joint 10 in FIGS. 1 to 12 used in the case of the concrete segment shown in FIG. 5 are applied to the concrete filling segment in FIG. 19, the anchor attachment portion 3 of the female joint 10 </ b> C. Without welding the anchor 4 (steel bar) to the end, the plate-like fixing member 5 is welded to the end of the anchor mounting portion 3, and from the female joint 10C without welding the anchor 4 (steel bar) to the male joint 20C. What is necessary is just to weld the plate-shaped fixing member 5 to the edge part on the side to separate, and to comprise 2nd Embodiment of FIGS.
Further, if the male joint 20 and the female joint 10 of FIGS. 1 to 12 are applied to a steel segment, the anchor attachment portion 3 is not welded to the female joint 10B, and the anchor 3 is not welded to the male joint 20B. What is necessary is just to comprise the 2nd modification shown in FIGS.

Therefore, according to the segment joint (100 to 100C) of the first embodiment and the second embodiment, it is not necessary to prepare for each segment type, and the number of parts is reduced, so that parts management is facilitated.
And since there is no need to prepare for each segment type, assortment with various dimensions changed corresponding to the expected external force becomes possible, so there is a risk of insufficient strength or use joints with excessive strength There is no risk of doing so.

Next, a third embodiment of the present invention will be described with reference to FIGS.
In the first embodiment shown in FIGS. 1 to 12, the steel joint 10 and 10A are provided with the anchor mounting portion 3, and the anchor mounting portion 3 and the male joints 20 and 20A are formed with threads or other irregularities. The rod 4 is fixed as an anchor. On the other hand, as shown in FIGS. 20 and 22, the female joint 10 </ b> D of the third embodiment is not provided with an anchor attachment portion, and a steel bar (anchor) is not fixed.
Therefore, the shape of the halved parts 1D-1 and 1D-2 of the main body 1D of the female joint 10D shown in FIG. 21 is also opposite to the hook-shaped part 1D-1A (1D-2A) (the right side in FIGS. 21 and 22). ) Is different from that of the first embodiment (see FIG. 2).
The male joint 20D of the third embodiment is the same as the male joint 20B of FIG. 14 (male joint in the second modification of the first embodiment), and the male joint 20 of the first embodiment shown in FIG. Is omitted.

In the halved component 1D-1 shown in FIG. 21, a hook-like portion 1D-1A having an L-shaped cross section having a bent portion is provided at an end portion (on the left side in FIG. 21) that engages with the male joint 20D. This is the same as the halved component 1-1 shown in FIG.
In the halved component 1D-1 in FIG. 21, a central plate portion 1D-1C is formed in a region extending to the side (right side in FIG. 21) separated from the bowl-shaped portion 1D-1A. The center plate portion 1D-1C has a recess J at the center in the up-down direction. When the halved portions 1D-1 and 1D-2 are joined (welded), the peripheral edge of the recess J abuts against the halved component 1D-2. The concave portion J of the central plate portion 1D-1C extends to an end portion on the opposite side (right side in FIG. 21) to the flange-shaped portion 1D-1A of the half-part 1D-1, and the end portion is open. Yes.
Notch portions 1D-1D are provided at both upper and lower end portions of the center plate portion 1D-1C, and serve as welding points when the halved components 1D-1 and 1D-2 are joined (welded).

In FIG. 20 showing the female joint 10D of the third embodiment, the half part 1D-1 in FIG. 21 and the symmetrical half part 1D-2 face each other, and the center plate portions 1D-1C and 1D-2C respectively. The female joint 10D (main body portion 1D) is manufactured by abutting at the peripheral edge portion and welding with the welding groove 1J (welding the welded portion WG, upper side and lower side). The weld groove 1J has notches 1D-1D (see FIG. 1D) formed at the upper and lower ends of the center plate portions 1D-1C and 1D-2C when the halved parts 1D-1 and 1D-2 are brought into contact with each other. 21) and 1D-2D (notched portion on the half-part 1D-2 side). That is, the welding groove 1J is formed above and below the main body 1D, respectively.
When the halved parts 1D-1 and 1D-2 are welded, the concave portion J (see FIG. 21) of the central plate portion 1D-1C (see FIG. 21) and 1D-2C (the central plate portion on the halved component 1D-2 side). Thus, the cavity L is formed. The hollow portion L is formed in the female joint 10D for weight reduction.
In the female joint 10D, the configurations and operational effects of the hook-shaped portions 1D-1A and 1D-2A that form the engaging portion with the male joint 20D are the same as those in the first embodiment of FIGS.

FIG. 22 shows a state where the male joint 20D and the female joint 10D of the third embodiment are engaged.
22, the female joint side (right side in FIG. 22) end of the male joint 20 </ b> D is connected to the engagement part (region R) with the male joint 20 </ b> D constituted by the flange-shaped portions 1 </ b> D- 1 </ b> A and 1 </ b> D- 2 </ b> A of the female joint 10 </ b> D. Is inserted, and the male joint 20D and the female joint 10D are engaged.
The male joint 20D is the same as the male joint 20B of FIG. 14 (second modification of the first embodiment), and the anchor 4 is omitted from the male joint 20 of the first embodiment shown in FIG. It is what. And when engaging with female joint 10D, there exists an effect similar to male joints 20 and 20B.

As shown in FIG. 23, the segments connected by the female joint 10D and the male joint 20D of the third embodiment are not filled with concrete on the inside, and the radially outer circumferential surface SGS (outer circumferential surface) and It is assumed that a connection surface SGF connected to an adjacent segment is used for connection of a steel segment made of a steel plate.
The male joint 20D and the female joint 10D are fixed (for example, welded) to the connection surface SGF of each steel segment.

In FIG. 23, the female joint 10D and the male joint 20D of the third embodiment are respectively installed on the connection surface SGF of the adjacent steel segment SGS and welded to the connection surface SGF of the steel segment SGS on which each is installed ( It is fixed by a welding part WH).
Although not clearly shown in FIG. 23, a through hole through which the female joint 10 </ b> D and the male joint 20 </ b> D penetrates the steel plate of the connection surface SGF of the steel segment SGS with which the female joint 10 </ b> D and the male joint 20 </ b> D engage. Is provided.
In FIG. 23, the female joint 10D and the male joint 20D are engaged (connected) at the connection surface SGF of the steel segment. Even if a force to pull the male joint 20D and the female joint 10D from the steel segment SGS (pulling force) is applied, the male joint 20D and the female joint 10D are fixed to the connection surface SGF of the steel segment by welding. Is prevented from slipping out of the segment.

The joint 100D according to the third embodiment is manufactured in a mold that is complementary to the halved parts 1D-1, 1D-2 (the part shown in FIG. 21 and the symmetrical part in FIG. 21) of the main body 1D of the female joint 10D. The die-cutting forging of the halved parts 1D-1 and 1D-2 is executed using the die, and the body portion 2D of the male joint 20D is die-cut forging using a die complementary to the body portion 2D of the male joint 20D. Execute the process.
Then, a process of welding the half-cut parts that have been die-forged (the half-part 1D-1 shown in FIG. 21 and the symmetrical half-part 1D-2 shown in FIG. 21) at the groove is performed.
The step of die-forging the anchor mounting portion 3 in the first embodiment, the step of welding the anchor 4 (steel bar), and the step of the plate-like fixing member 5 in the second embodiment are not required in the third embodiment.

According to the third embodiment, even if it is a steel segment, the female joint 10D and the male joint 20D are obtained by partially changing the structure of the main body portions 1 and 1A of the female joints 10 and 10A of FIGS. This can be achieved by omitting the anchor mounting portion 3 and the anchor 4 (steel bar) and omitting the anchor 4 (steel bar) from the male joints 20 and 20A.
In addition, since the anchor attachment portion is not provided in the third embodiment, durability against external force (external force in the direction FP in FIG. 20) acting in the direction in which the half parts are pressed is improved.
Furthermore, the female joint 10D according to the third embodiment can be reduced in weight due to the absence of the anchor attachment portion and the presence of the surplus removed portion (hollow portion L).
Other configurations and operational effects in the third embodiment of FIGS. 20 to 23 are the same as those of the second embodiment of FIGS.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
In the embodiment of FIGS. 1 to 12, the anchor joint 3 is provided in the female joints 10 and 10 </ b> A, and the steel rod 4 (anchor) is fixed to the anchor joint 3. On the other hand, in 4th Embodiment of FIG. 24, FIG. 25, the anchor attachment part is not provided in the female joint, but the anchor is being fixed to the main-body part of a female joint (for example, welding).
In 4th Embodiment of FIG. 24, FIG. 25, the male coupling is comprised similarly to 1st Embodiment.

In FIG. 24 which shows the female joint 10E of 4th Embodiment, the main-body part 1E of the female joint 10E is comprised similarly to female joint 10D (main-body part 1D) of FIG. And the female joint 10E does not have an anchor attachment part similarly to female joint 10D (FIG. 20).
Anchors 4 (for example, deformed steel bars) similar to those used in the embodiment of FIGS. 1 to 12 are welded to both side surfaces of the body portion 1E of the female joint 10E (welded portion WI).
In addition, in the main body portion 1E of the female joint 10E, as in the case of the female joint 10D in FIG.

FIG. 25 shows a state where the male joint 20E and the female joint 10E of the fourth embodiment are engaged. The engaging portion (region R) of the female joint 10E with the male joint 20E constituted by the flange-shaped portions 1E-1A and 1E-2A has a distal end 2H (with a T-shaped cross-section) at the female joint side end of the male joint 20E. Part) is inserted, and the male joint 20E and the female joint 10E are engaged.
As described above, the male joint 10E is the same as the male joint 20 (FIG. 3) of the first embodiment, and the anchors 4 are fixed to both side surfaces of the flat plate portion 2I of the male joint main body 2E by welding (welding) Part WJ).

The joint 100E according to the fourth embodiment is manufactured by executing a step of die-forging the half part using a mold that is complementary to the half part of the body part 1E of the female joint 10E, and the body part of the male joint 20E. A step of die-forging the main body portion 2E of the male joint 20E using a die complementary to 2E is executed.
And the process of welding the half-parts die-forged by a groove part is performed.
Furthermore, what is necessary is just to perform the process of welding the anchor 4 (bar-shaped member) to the female joint main-body part 1E and the male joint main-body part 2E.

The fourth embodiment shown in FIGS. 24 and 25 is also applied to the concrete segment in the same manner as the first embodiment.
However, since the anchor attachment portion is not provided in the fourth embodiment of FIGS. 24 and 25, the configuration is simplified correspondingly and the manufacture is easy. In addition, there is a portion (cavity portion L) from which extra space is removed for weight reduction.
Other steel products and effects in the fourth embodiment shown in FIGS. 24 and 25 are the same as those in the first embodiment shown in FIGS.

Next, a fifth embodiment of the present invention will be described with reference to FIGS.
In FIG. 26, the main body portion of the female joint according to the fifth embodiment is denoted by reference numeral 1G.
The main body 1G has halved parts 1-1G and 1-2G, and, like the main body 1 shown in FIG. 1, the halved parts 1-1G and 1-2G are welded by the groove 1G-I. To be molded.
In the halved parts 1-1G and 1-2G, hook-shaped portions 1-1GA and 1-2GA having bent portions are formed at the end of the male joint 20 (arrow 20G side in FIG. 26). .

For example, compared with the female joint main body 1 shown in FIG. 1, the main body 1G in FIG. 26 is a bowl-shaped portion on the male joint 20 side (arrow 20G side in FIG. 26: male joint not shown in FIG. 26). A hook-shaped part extension 1-1GAE extends outside the 1-1GA (arrow RO side in FIG. 26), and the hook-shaped part extension 1-1GAE is configured integrally with the hook-shaped part 1-1GA. Yes. In addition, a reinforcing rib 1-1GR integrated with the half component 1-1G is formed on the outer surface (arrow RO side) of the half component 1-1G.
Similarly, a hook-shaped portion extension 1-2GAE extends on the outer side (arrow LO side in FIG. 26) of the hook-shaped portion 1-2GA on the male joint 20 side (arrow 20G side in FIG. 26). The partial extension 1-2GAE is formed integrally with the shaped portion 1-2GA. And the reinforcement rib 1-2GR integral with the half component 1-2G is formed in the surface (arrow LO side) of the half component 1-2G.

In the fifth embodiment of FIGS. 26 to 28, the main body portion of the male joint 20 (not shown in FIGS. 26 to 28) is the same as that of the embodiment of FIGS.
Moreover, in 5th Embodiment, parts (anchor attachment part 3, the anchor 4, or the plate-shaped fixing member 5) other than the main-body part 1 of a female joint are mentioned later.
Although not clearly shown in FIGS. 26 to 28, as shown in FIG. 10 also in the fifth embodiment, they are the inner surfaces (surfaces opposite to the arrow 20G) of the pair of hook-shaped portions 1-1GA and 1-2GA. The angle of the bent portions of the flange-shaped inner surfaces 1-1GAF and 1-2GAF can be set to an angle smaller than 90 °, for example, in the range of 88 to 83 ° (corresponding to the angle α in FIG. 10). Of course, as shown in FIG. 12, the angle of the bent portion inner surface 1-1GAF and 1-2GAF can be set to 90 ° (corresponding to the angle β in FIG. 12).

The operational effects of the fifth embodiment will be described with reference to FIGS.
FIG. 27 shows a case where a very strong tensile force FA acts on the female joint body 1 and the male joint body 2 according to the first embodiment of FIGS.
As shown in FIG. 27, when a very strong tensile force FA is applied, a bending moment as indicated by an arrow M is applied to the hook-shaped portions 1-1A and 1-1B at the tip of the female joint body 1. . Since the tensile force FA is very strong, the bending moment M is also very strong.

This bending moment M acts on a region γ on the male joint side (left side in FIG. 27) of the concrete CS constituting the concrete segment SG1 (SG2) in which the female joint body 1 is embedded.
Therefore, in the first embodiment shown in FIGS. 1 to 10, there is a possibility that the concrete in the region indicated by γ is damaged.
27 illustrates the first embodiment of FIGS. 1 to 10 by way of example, but the same applies to the embodiments of FIGS. 11 to 25.

On the other hand, in the case of the fifth embodiment shown in FIG. 26, the hook-shaped portion 1-1GA at the distal end of the male joint has a hook-shaped portion extension 1-1GAE extending outward (arrow RO side in FIG. 26). The hook-shaped part 1-2GA has a hook-shaped part extension 1-2GAE extending outward (arrow LO side in FIG. 26).
In the fifth embodiment, as shown in FIG. 28, since the saddle-like portion extensions 1-1GAE and 1-2GAE exist in the region δ, a very strong bending moment M acts on a partial region of the concrete CS. Instead, it acts on the entire concrete CS constituting the concrete segment SG1 (SG2). Therefore, there is little risk of breakage of concrete. Further, in the fifth embodiment, since the reinforcing ribs 1-1GR and 1-2GR are formed, the fifth embodiment has a structure in which the bending moment M is not easily generated even when a very strong tensile force FA is applied. It has become.
In other words, according to the fifth embodiment, even if a very strong tensile force FA acts due to the operational effects of the hook-shaped portion extending portions 1-1GAE, 1-2GAE and the reinforcing ribs 1-1GR, 1-2GRE, Damage to the concrete of the buried segment is prevented.

As described with reference to FIGS. 27 and 28, the fifth embodiment is based on the premise that the segment is made of concrete. Therefore, the fifth embodiment of FIGS. 26 to 28 includes the concrete segments SG1 and SG2 in the first embodiment of FIGS. 1 to 10 and the radially outer surface (outer periphery) in the second embodiment of FIGS. Surface) and connecting surfaces (surfaces to which the segments are connected in the circumferential direction) are made of steel plates, and the other parts can be used for the segments SGS filled with concrete.
Therefore, in 5th Embodiment of FIGS. 26-28, when using it for concrete segments SG1 and SG2 (FIGS. 5-7), as shown in FIGS. For example, the anchor 4 made of a deformed steel rod is fixed to the main body 1G of the female joint. On the other hand, when used for the segment SGS shown in FIG. 19 (the radially outer surface and the connecting surface are made of steel plates, and the other portions are filled with concrete), the anchor mounting portion 3 is fixed in a plate shape. The member 5 is fixed and used.
Other configurations and operational effects of the fifth embodiment described with reference to FIGS. 26 to 28 are the same as those of the embodiments of FIGS.

  It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

1, 1A, 1B, 1C, 1D, 1E, 1G... Main body part 1-1, 1-2, 1A-1, 1A-2, 1-1G, 1-2G,. 1-1A, 1-2A, 1A-1A, 1A-2A, 1-1GA, 1-2GA... Bowl-shaped part 2, 2A, 2B, 2C, 2D, 2E ... main body 2H of male joint ..Tip section of male joint (T-shaped section)
3 ... Anchor mounting part 4 ... Anchor (steel bar)
10, 10A, 10B, 10C, 10D, 10E, 30 ... Female joint 20, 20A, 20B, 20C, 20D, 20E, 40 ... Male joint 100, 100A, 100B, 100C, 100D, 100E ... Segment fitting

Claims (6)

Consists of male and female joints,
The female joint has a main body portion formed by overlapping a pair of symmetrical half parts,
The end of the halved part of the body part of the female joint is provided with a hook-shaped part having an L-shaped cross section having a bent part,
The tip of the female joint side end of the main body of the male joint has a complementary shape to the region between the pair of hook-shaped parts in the main body of the female joint,
A taper is formed in the arrow V direction on the flange-shaped part of the female joint and the T-shaped part of the male joint.
A segment joint, wherein the male joint and the female joint are forged products.   The segment joint according to claim 1, wherein the angle of the bent portion in the flange-shaped portion of the female joint is smaller than 90 °.   2. A flange-shaped part on the male joint side of the half part of the female joint has a hook-shaped part extension extending outward, and a reinforcing rib is formed on the outer surface of the half part. The segment joint according to any one of 2 above.   A groove having a T-shaped cross section is formed on the opposite side of the flange-shaped portion of the main body portion of the female joint, and a substantially T-shaped anchor mounting portion having a tip portion having a cross-sectional shape complementary to the groove is fixed. The segment joint according to any one of claims 1 to 3.   A step of die-forging a half-part using a die that is complementary to the half-part of the female joint body, and a die-forging of the body of the male joint using a die that is complementary to the body of the male joint A method of manufacturing a segment joint, comprising a step and a step of welding halved parts that have been die-forged.   A step of die-forging the anchor attachment portion using a mold complementary to the anchor attachment portion, and a cross-sectional T-shaped portion at the tip of the anchor attachment portion is inserted into the fitting groove on the opposite side to the flange portion of the main body portion. The manufacturing method of the segment coupling of Claim 5 including the process and the process of welding the said cross-section T-shaped part and the said fitting groove part after insertion.

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