JP2010265609A - Joint structure of segment, and the segment using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure of a segment, which can enhance workability of connecting work by preventing the deformation of a joint and damage to it, when the segments are connected together in the circumferential direction of a tunnel. <P>SOLUTION: A male joint 20 includes: a connecting fitting 30 which is protruded to the outside of one joint surface from the inside thereof, and which has a protruded leading end provided with an engaging portion 33 provided almost in parallel with the axial direction of a tunnel; and an elastic member 25 which can urge the connecting fitting toward both sides in the circumferential direction of the tunnel. A female joint 40 comprises an insertion hole 47 which is formed on the other joint surface, and a member 49 to be engaged, which is provided on the other joint surface. When joint surfaces 14a and 14b of the segments 3a and 3b to be connected abut on each other during the connecting work, the connecting fitting is pressed by the other joint surface and housed in a storage space 28 which is provided in the male joint, and can prevent the deformation of the male joint and damage to it. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a joint structure for a segment that can connect adjacent segments in the circumferential direction of the tunnel, and a segment using the joint structure.

  Conventionally, as a joint structure for connecting adjacent segments in the circumferential direction of the tunnel, the male joint of the other segment is inserted into the insertion hole provided in the female joint of one segment, and then these segments are tunneled. In general, a structure is used in which the segments are relatively moved in the axial direction to thereby connect the segments (for example, see Patent Documents 1 and 2).

  In the joint structures disclosed in Patent Document 1 and Patent Document 2, the male joint is attached to the joint surface of the segment via an elastic member, and after the segments are connected, the elastic members are attracted to each other by the elastic member. To demonstrate its power. Thereby, the segments to be connected are firmly connected to each other, and further, the water stoppage between the segments is improved.

JP 11-280388 A JP-A-2005-68699

  However, in the segment joint structure disclosed in Patent Documents 1 and 2 described above, the male joint protrudes outward from the joint surface of the segment, and the male joint cannot freely move toward the inside of the segment. It is said that. For this reason, when connecting the segments, if the male joint interferes with the joint surface where the female joint is provided, the male joint is easily damaged or deformed, and the connection becomes impossible. There is a risk that. In order to prevent this, generally, the work of accurately aligning the male joint of one segment and the insertion hole of the female joint in the other segment is performed, but such positioning work improves work efficiency. This is not preferable.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is a joint structure of segments that allows a plurality of segments adjacent in the tunnel circumferential direction to be connected, A joint structure of a segment that can prevent deformation and damage of the joint during the connection work, can improve the workability of the connection work, and can realize these effects with a simple configuration. And providing a segment using the same.

In order to solve the above-mentioned problems, the present inventor has a male joint that protrudes from the inside of one joint surface to the outside and has an engaging portion provided substantially parallel to the tunnel axis direction at the protruding tip. A metal fitting and an elastic member capable of urging the connecting hardware toward both sides in the circumferential direction of the tunnel, and the female joint is provided in an insertion hole formed in the other joining surface and the other joining surface. The male joint is pressed by the other joint surface when the joint surfaces of the respective segments to be coupled are brought into contact with each other, and the inner side of the one joint surface The connecting hardware is further provided with a housing space capable of accommodating the connecting hardware to be moved to a position where the connecting surfaces of the segments to be connected are in contact with each other relative to each other in the tunnel axis direction. Moved to In this case, the distal end of the connection hardware accommodated in the accommodation space is pressed by the elastic member and can be inserted into the insertion hole, and further moved in the tunnel axis direction to be inserted into the insertion hole. Invented is a segment joint structure characterized in that the inside of the engaging portion of the connecting hardware can be engaged with the engaged member.

  That is, the joint structure of the segment according to the first invention includes a male joint and a female joint respectively provided on one joint surface and the other joint surface of the segments adjacent to each other in the tunnel circumferential direction. In the joint structure of the segments that allow the segments adjacent to each other to be connected, the male joint protrudes from the inside of the one joint surface to the outside, and the engaging portion is provided substantially parallel to the tunnel axis direction at the protruding tip And a resilient member that allows the coupling hardware to be biased toward both sides of the tunnel circumferential direction, the female joint includes an insertion hole formed in the other joint surface, and the other joint The male joint is pressed against the other joint surface when the joint surfaces of the segments to be connected are brought into contact with each other. And further comprising an accommodating space capable of accommodating the connection hardware that is moved to the inside of the one joint surface, the connection hardware from the state where the joint surfaces of the segments to be connected are in contact with each other. When the joint surface is moved relatively in the tunnel axis direction, the tip of the connection hardware accommodated in the accommodation space is pressed by the elastic member and can be inserted into the insertion hole, and the tunnel axis direction Further, the inner side of the engaging portion of the connecting hardware inserted through the insertion hole can be engaged with the engaged member.

  In the segment joint structure according to a second aspect of the present invention, in the first aspect, a guide surface is formed on the inner side of the engagement portion of the connecting metal piece so as to be separated from the one joint surface toward the tip. It is characterized by that.

  A segment joint structure according to a third invention is characterized in that, in the first or second invention, the engaged members are joint plates provided on both sides of the segment in the tunnel circumferential direction.

  The segment joint structure according to a fourth aspect of the present invention is the first or second aspect of the invention, wherein the female joint is disposed inside the engaged member, and the engagement portion of the coupling hardware can be inserted. A plate-like member having a hole is further provided, and the inside of the engaging portion of the connection hardware can be engaged with the engagement hole of the plate-like member instead of the engaged member. .

  A segment joint structure according to a fifth aspect of the present invention is the first or second aspect, wherein the female joint is disposed inside the other joint surface in place of the engaged member, and the coupling hardware is engaged. A plate-like member having an engagement hole into which the part can be inserted, and the inside of the engagement part is engaged with the engagement hole of the plate-like member instead of the engaged member. It is possible to do this.

  In the joint structure of the segment according to the sixth aspect of the present invention, in the fourth or fifth aspect, the engagement hole of the plate-like member is penetrated in the tunnel axis direction, and inside the engagement portion of the connection hardware, A protruding portion that protrudes toward the one joint surface is provided.

  The joint structure of the segment according to the seventh invention is the invention according to any one of the first invention to the sixth invention, wherein the connecting hardware is detachably attached to the one joint surface. Features.

  The joint structure of a segment according to an eighth aspect of the present invention is the invention according to any one of the first to seventh aspects, wherein the elastic member is composed of a coil spring, a disc spring, or a rubber member.

  The joint structure of the segment according to the ninth invention is the invention according to any one of the first invention to the eighth invention, wherein the elastic member of the male joint is a first elastic member disposed in the accommodating space; A second elastic member disposed outside the one joint surface in the housing space, the spring constant being greater than that of the first elastic member. The connecting hardware further includes a holding hardware that is disposed between the first elastic member and the second elastic member on the side opposite to the tip thereof and disposed in the accommodation space, and is connected to the other of the adjacent segments. The second elastic member and the holding hardware can be separated when pressed against the surface.

  The segment according to the tenth invention has the male joint of the invention according to any one of the first invention to the ninth invention on one joining surface in the circumferential direction of the segment, and any one of the first invention to the ninth invention. The female joint according to the present invention is provided on the other joint surface in the circumferential direction of the segment.

  In the segment joint structure of the present invention, it is possible to perform the connecting operation between the segments while accommodating the distal end of the coupling hardware in the male-side accommodation space. For this reason, at the time of connecting the segments, it is possible to prevent the male joint from being damaged and deformed due to the interference of the connecting hardware of the male joint with the joint surface provided with the female joint. In addition, the segment connection work can be completed without accurately aligning the connection hardware in one segment and the insertion hole of the female joint in the other segment. Workability is improved.

It is a perspective view of a shield tunnel constructed by connecting a plurality of segments. It is a perspective view of a synthetic segment. It is a figure which shows the structure of a synthetic | combination segment, (a) is the front sectional drawing, (b) is the side sectional drawing. It is a schematic plan view of a synthetic segment. It is front sectional drawing which shows the structure of the joint structure of the segment which concerns on this invention. (A) is a side view which shows the structure of a male joint, (b) is a side view which shows the structure of a female joint. It is front sectional drawing which shows the structure before and behind operation | movement of a female joint. It is a disassembled perspective view which shows the structure of a male joint. It is a figure for demonstrating the process of connecting a segment to a tunnel circumferential direction. It is a figure for demonstrating the process of connecting a segment to a tunnel circumferential direction. It is a figure for demonstrating the process of connecting a segment to a tunnel circumferential direction. It is a front sectional view for explaining other composition of a male joint. (A) is front sectional drawing which shows the other structure of holding | maintenance hardware, (b) is a front view which shows the other structure of a connection metal fitting, (c) is the front which shows the state which made the leaf | plate spring member fit to a connection metal fitting. FIG. (A) is B1-B1 sectional view taken on the line, (b) is B2-B2 sectional view taken on the line. (A) is front sectional drawing which shows the other connection form of a holding | maintenance metal fitting and a connection metal fitting, (b) is the c section enlarged view of (a). It is a figure for demonstrating the other structure of a male coupling and a female joint, (a) is front sectional drawing of a male coupling, (b) is front sectional drawing of a female coupling. It is a figure for demonstrating the process of connecting a segment to a tunnel circumferential direction. It is a figure for demonstrating the process of connecting a segment to a tunnel circumferential direction. It is a figure which shows the structure of steel segments, (a) is the front sectional drawing, (b) is the side sectional drawing. It is the front sectional view showing the composition at the time of applying the joint structure of the segment concerning the present invention to a steel segment. It is front sectional drawing which shows the state by which the steel segments were connected in the tunnel circumferential direction. It is a figure which shows the structure of a concrete segment, (a) is the front sectional drawing, (b) is the side sectional drawing. It is the front sectional drawing which shows the structure at the time of applying the joint structure of the segment which concerns on this invention to a concrete segment. It is front sectional drawing which shows the state with which the concrete segment was connected to the tunnel circumferential direction.

  Hereinafter, as a best mode for carrying out the present invention, a segment joint structure capable of connecting a plurality of segments adjacent to each other in the tunnel circumferential direction, and a segment to which the joint structure of the segment is applied will be described with reference to the drawings. This will be described in detail.

1st Embodiment The 1st Embodiment of the joint structure of the segment to which this invention is applied is described with reference to FIGS.

  FIG. 1 shows a perspective view of a shield tunnel 1 as a tunnel covering body constructed by connecting a plurality of segments 3 used in the present invention in the circumferential direction of the tunnel and in the tunnel axial direction.

  The segment 3 is formed in an arc plate shape in a side view and is formed in a rectangular shape in a plan view. As shown in FIG. 1, the segments 3 are connected in a ring shape between the segments 3 adjacent to each other in the circumferential direction of the tunnel via a segment joint portion 7 to constitute a segment ring 4. The segment ring 4 is configured as a tubular tunnel covering body that is connected between the segments 3 adjacent in the tunnel axis direction via a ring joint portion 5 and extends in the tunnel axis direction. In this shield tunnel 1, for example, a road floor for driving a car is constructed, but in addition to this, a lifeline such as a railway line, a waterway, a water pipe or an electric wire may be provided. Good. The present invention is applied to realize a joint structure of segments in the segment joint portion 7.

  The segment 3 used in the present invention is configured as a synthetic segment 3A as shown in FIGS. 2 and 3, for example. 2 is a perspective view of the synthetic segment 3A. FIG. 3 (a) is a front sectional view of the synthetic segment 3A, and FIG. 3 (b) is a side sectional view of the synthetic segment 3A. Moreover, the upper part in FIG. 3 shows the sky side in the tunnel, and the lower part shows the tunnel ground side.

  The composite segment 3 </ b> A includes a steel shell 10 and concrete 19 filled in the inner space of the steel shell 10.

  The steel shell 10 is formed to extend in the circumferential direction of the tunnel, and a pair of main girders 11 that are spaced apart from each other in the tunnel axis direction and a pair that connects between the ends of the pair of main girders in the tunnel circumferential direction. And a pair of main girders 11 and a skin plate 16 fixed to the ends of the pair of joint plates 13 on the tunnel ground side. By the main girder 11, the joint plate 13, and the skin plate 16, the steel shell 10 is formed in a box shape in which the tunnel ground side is opened.

  In the steel shell 10, a plurality of vertical ribs 15 substantially parallel to the joint plate 13 are arranged at intervals in the tunnel circumferential direction on the inner side of the skin plate 16 in the tunnel. In the concrete 19, a plurality of reinforcing bars 17 substantially parallel to the main girder 11 are arranged at intervals in the tunnel axis direction on the inner side of the end portion of the vertical rib 15 in the tunnel.

  The main girder 11, the joint plate 13, the vertical ribs 15, and the skin plate 16 constituting the steel shell 10 are embodied by, for example, steel plates and are fixed to each other by welding or the like. The main girder 11 and the skin plate 16 are curved along the tunnel circumferential direction.

  When the shield tunnel 1 is constructed, the composite segment 3A having such a configuration has an outer surface of one joint plate 13a on one end side in the tunnel circumferential direction and an outer surface of the other joint plate 13b on the other end side in the tunnel circumferential direction. Are placed in contact with each other. In other words, one joint surface 14a on one end side in the tunnel circumferential direction and the other joint surface 14b on the other end side in the tunnel circumferential direction are arranged in contact with each other.

  As shown in FIGS. 4 and 5, the segment joint structure 9 according to the present invention is a male joint provided respectively on one joint surface 14 a and the other joint surface 14 b of the segment 3 </ b> A adjacent to each other in the tunnel circumferential direction. 20 and a female joint 40.

  As shown in FIGS. 5, 6 (a), and 7 (a), the male joint 20 is disposed within the male side container 21 and the male side container 21 disposed inside the one joint surface 14 a. The holding hardware 23 and the elastic member 25, and the connection hardware 30 connected to the holding hardware 23 are provided. In addition, the insertion hole 27 is formed in one joining surface 14a.

  As shown in FIG. 7A, the male container 21 has an opening formed at one end side in the tunnel circumferential direction, and a bottom 21c formed at the other end side in the tunnel circumferential direction. Has been. The male side container 21 is fixed by welding or the like after its opening edge 21a is in contact with the back surface of the joint plate 13a. The male housing 21 is attached to the inner surface of the joint plate 13a so that the internal space and the outer surface side space of the joint plate 13a are in communication with each other through an insertion hole 27 formed in the joint plate 13a. ing. The male container 21 is attached to prevent the concrete 19 filled in the inner surface of the joint plate 13a from entering the internal space.

  As will be described later, the male joint 20 can accommodate the connection hardware 30 that is moved inward from the one joint surface 14a in the male housing 21 and the insertion hole 27 formed in the one joint plate 13a. The male side accommodation space 28 is provided.

In the present embodiment, the holding hardware 23 is constituted by a nut provided with a female screw portion 23a threaded on the inner peripheral surface, as shown in FIGS. In the present embodiment, the elastic member 25 has one end connected to the end of the holding metal 23 and the other end connected to the bottom 21c of the male housing 21 and is constituted by a coil spring. The holding hardware 23 is prevented from being removed from the insertion hole 27 of the joint plate 13 a by the elastic member 25.

  As shown in FIG. 8, the connecting hardware 30 includes a shaft portion 31 made of a cylindrical bar and an engaging portion 33 made of a flat plate.

  As shown in FIG. 7A, the shaft portion 31 is connected at its proximal end in the axial direction to the holding metal 23, is inserted through the insertion hole 27, and the distal end in the axial direction is one joint plate 13a. It is arranged outside. This means that the connecting hardware 30 protrudes from the inside of one joint surface 14a toward the outside through the insertion hole 27.

  As shown in FIG. 8, the shaft portion 31 of the connection hardware 30 is formed with a male screw portion 37 threaded on the outer peripheral surface on the proximal end side in the axial direction. The male screw portion 37 is configured to be able to be screwed together with the female screw portion 23a of the holding metal piece 23. The coupling hardware 30 is detachably coupled to the holding hardware 23 by screwing the male thread portion 37 with the female thread 23 a of the holding hardware 23.

  The engaging portion 33 is provided at the tip of the connecting hardware 30 protruding from the one joint surface 14a so as to be substantially parallel to the tunnel axis direction. As shown in FIG. 7A, a guide surface 35 is formed on the inner side of the engaging portion 33 so as to be separated from one joint surface 14 a toward the distal end of the engaging portion 33.

  The connection hardware 30 of the male joint 20 configured as described above is only connected to the male housing 21 via the holding hardware 23 and the elastic member 25 and is not restricted by other members. It is possible to move toward both sides of the tunnel circumferential direction.

  The elastic member 25 connected to the holding metal 23 is opposite to the moving direction with respect to the connecting metal 30 via the holding metal 23 when the connecting metal 30 moves in any direction in the circumferential direction of the tunnel. An elastic restoring force can be applied to the side. This means that the elastic member 25 is arranged in the male housing 21 so as to be able to bias the connection hardware 30 toward both sides in the tunnel circumferential direction.

  As shown in FIG. 7B, the male joint 20 applies a load to the connection hardware 30 toward the base end side of the shaft portion 31, and the connection hardware 30 is located inside the one joint surface 14 a. When moved, the shaft portion 31 and the engaging portion 33 of the connecting hardware 30 and the holding hardware 23 are accommodated inside the male housing 21 and the insertion hole 27 formed in one joint plate 13a. A male-side accommodation space 28 that can be formed is formed. The connection hardware 30 is movable toward the inside of one joint surface 14a to the extent that the outer end face 34 is disposed on substantially the same surface as at least one joint surface 14a. The size, shape, and the like of 28 are adjusted so that the connected hardware 30 and the holding hardware 23 thus moved can be accommodated. In addition, the male side accommodation space 28 may be adjusted so that the connection hardware 30 can be accommodated even when the outer end face 34 of the connection hardware 30 is moved inward from the one joint surface 14a. Of course.

  Here, as shown in FIG. 7 (b), the connecting hardware 30 housed in the male housing space 28 is urged toward the distal end side of the shaft portion 31 by the elastic member 25. For this reason, by releasing the load applied to the connection hardware 30, the connection hardware 30 is pressed by the elastic member 25 and moves to the initial position again as shown in FIG. 7A. become.

As shown in FIG. 5 and FIG. 6B, the female joint 40 is formed through the insertion hole 47 formed in the other joint surface 14 b and the inner side of the other joint surface 14 b, and is opened by the insertion hole 47. Female side accommodating space 43 and a female side accommodating body 41 disposed inside the other joint surface 14b. In the present embodiment, the female side accommodating space 43 is surrounded by the inner wall surface of the female side accommodating body 41 and the inner surface of the other joint plate 13b constituting the other joint surface 14b.

  The female-side container 41 is formed in a box shape opened toward the outside of the other joint surface 14b. The female side container 41 is fixed by welding or the like after its opening edge 41a is in contact with the inner surface of the joint plate 13b. The female housing 41 is attached to the inner surface of the joint plate 13b so that the female housing space 43 therein and the outer surface space of the other joint plate 13b are in communication with each other through the insertion hole 47. It has been. The female container 41 is attached such that a part of the inner surface 45 of the joint plate 13b located in the vicinity of the insertion hole 47 remains in a predetermined range. The position where this part of the inner surface 45 is provided with respect to the insertion hole 47 corresponds to the direction from the distal end side of the shaft portion 31 of the coupling hardware 30 toward the distal end side of the engaging portion 33, as will be described later. With the inner surface 45 as the engaged surface 45, the engaging portion 33 of the coupling hardware 30 is engaged.

  Next, the process of connecting the segment 3 using the segment joint structure 9 in the present invention in the tunnel circumferential direction will be schematically described.

  First, as shown in FIG. 9A, with respect to the segment 3b that is already connected and fixed to the other segment, the other segment 3a is placed in the direction in which the respective joint surfaces 14a and 14b are close to each other. The joint surfaces 14a and 14b are brought into contact with each other. Here, when the segments 3a and 3b to be connected are brought into contact with each other, the outer end surface 34 at the front end of the connection hardware 30 in one segment 3a is the joint surface 14b in the other segment 3b and is inserted therethrough. It is adjusted so as to be in contact with the surface where the hole 47 is not provided. As a result, the connecting hardware 30 is pressed toward the inside of one segment 3a by the joining surface 14b of the other segment 3b, and as a result, is moved to the inside of one joining surface, as shown in FIG. As shown in b), it is housed in the male housing space 28.

  Next, as shown in FIG. 9B, from the state where the joint surfaces 14a and 14b of the respective segments 3a and 3b are in contact with each other, the new segment 3a is in the tunnel axial direction as indicated by the arrow in the figure. Move to. This means that the segments 3a and 3b are moved relatively in the tunnel axis direction. The new segment 3a is moved until the outer end surface 34 at the front end of the connecting hardware 30 accommodated in the male side accommodating space 28 reaches a position corresponding to the insertion hole 47 in the existing segment 3b. When reaching the position corresponding to the insertion hole 47 in the existing segment 3b, the connection hardware 30 is released from the restraint by the joint surface 14b in the existing segment 3b, as shown in FIG. From the state accommodated in the male side accommodating space 28, it is pressed by the urging | biasing by the elastic member 25, and is penetrated by the penetration hole 47 of the other joining surface 14b.

  When the new segment 3a is moved in the tunnel axis direction as shown by the arrow in the drawing from the state in which the joint surfaces 14a and 14b of the segments 3a and 3b are in contact with each other, the connecting hardware 30 is connected to the joint plate. It will rub against the joint surface 14b of 13b. For this reason, for example, it is preferable to apply a lubricant tape or apply a lubricant to the outer end surface 34 of the coupling hardware 30 or the joint surface 14b of the joint plate 13b which becomes the rubbing surface. It is possible to easily avoid the plate 13b and the connecting hardware 30 from being damaged by rubbing.

FIG. 10 shows a state after the connecting hardware 30 is inserted into the insertion hole 47 of the other joint surface 14b. In this state, the connecting hardware 30 moves the newly provided segment 3a further in the tunnel axis direction, thereby making the hole wall edge 47a of the insertion hole 47 located inside the other joint plate 13b with respect to the guide surface 35. Is adjusted so as to be able to contact. This position adjustment is performed by adjusting the shape and position of the connecting hardware 30 and the elastic force of the elastic member 25.

  For this reason, for example, by moving the new segment 3a on the left side in the drawing in the direction A1, the hole wall edge 47a of the other joint plate 13b comes into contact with the guide surface 35 of the connection hardware 30. Then, by further moving the new segment 3a on the left side in the figure in the direction A1, the hole wall end edge portion 47a of the other joint plate 13b pushes up the connection hardware 30 in the direction A2 via the guide surface 35, and the connection hardware 30 This tip is further advanced into the female-side accommodation space 43 of the female joint 40.

  FIG. 11 shows a state in which the connecting operation of the segments 3 is completed after the new segment 3a on the left side in the drawing is moved in the direction A1 by a predetermined length from the state of each segment 3 shown in FIG. As described above, when the connecting hardware 30 is inserted into the insertion hole 47 of the other joint surface 14b and then the segments 3a and 3b are moved relative to each other in the tunnel axis direction, the engaging portion 33 is provided. The inner engagement surface 39 is engageable with an engaged surface 45 which is a part of the inner surface of the other joint plate 13b. In other words, the inner side of the engaging portion 33 of the connecting hardware 30 can be engaged with the joint plate 13b as the engaged member 49, whereby the segments 3 adjacent in the tunnel circumferential direction can be connected. Will be.

  As described above, in the segment joint structure 9 of the present invention, it is possible to perform the connecting operation between the segments 3 while accommodating the distal end of the coupling hardware 30 in the male accommodation space 28. For this reason, it is possible to prevent damage and deformation of the male joint 20 due to interference of the connecting hardware 30 of the male joint 20 with the joint surface 14b on which the female joint 40 is provided during the connecting operation of the segments 3. It has become. Further, the connecting work of the segments 3 can be completed without accurately aligning the connecting hardware 30 in one segment 3 and the insertion hole 47 of the female joint 40 in the other segment 3, Therefore, workability at the time of connecting work is improved.

  The plurality of segments 3 connected by the segment joint structure 9 of the present invention are urged by the elastic member 25 toward the proximal end side of the shaft portion 31 in the axial direction. For this reason, each segment 3 has a force acting so as to be attracted to each other, so that even if there is an opening between the segments 3, this can be reduced. Water stoppage will be improved. The term “aperture” used herein refers to a gap in the tunnel circumferential direction generated between the joint surfaces of adjacent segments.

  In particular, the force acting to pull the segments 3 toward each other is the stage in which the guide surface 35 of the connection hardware 30 in one segment 3 is brought into contact with the hole wall edge 47a of the insertion hole 47 in the other segment 3. This is the force that occurs later. For this reason, even when the opening due to the manufacturing error or the construction error occurs between the segments 3 during the connecting operation of the segments 3, the guide surface 35 of the connecting hardware 30 in the one segment 3 can be used as the other segment. As long as it can be brought into contact with the hole wall edge 47a of the insertion hole 47 in No. 3, the connection work between the segments 3 can be performed, and this opening can be reduced. This means that an error absorption function that can absorb even if there are openings between the segments 3 due to manufacturing errors that occur during the production of the segments or construction errors that occur during the construction of the segment ring, is demonstrated. I mean. For this reason, according to the segment joint structure 9 to which the present invention is applied, the segments 3 can be smoothly connected without reducing the construction speed even when there are openings between the segments 3 due to manufacturing errors or the like. It is possible.

  Further, the male joint 20 of the segment 3 is engaged with the one joint surface 14a by screwing the male screw portion 37 of the connecting hardware 30 into the female screw portion 23a of the connecting hardware 30 disposed in the male housing 21. It is configured to be detachable. For this reason, when manufacturing the segment 3 in a factory or the like, the male side container 21 in which the holding hardware 23 and the elastic member 25 are accommodated and arranged is attached inside the one joint surface 14a. At the time of the connection work, the connection hardware 30 can be attached from the outside of the joint surface 14a. Thereby, the segment 3 after manufacture is in a state where there is no member protruding from the joint surfaces 14a and 14b on both sides thereof. For this reason, when the segment 3 is stored and transported, the joint surfaces 14a and 14b on both sides thereof are not caught by other objects, and damage to the connecting hardware 30 can be prevented. Storability and transportability will be improved.

  Next, the detail of each component used for the joint structure 9 of the segment in this invention is demonstrated.

  As the segment 3 to which the segment joint structure 9 according to the present invention is applicable, a steel segment 3B and a concrete segment 3C as described later are used in addition to the synthetic segment 3A described in the above embodiment. The detailed configuration of each segment 3 is not particularly limited. For example, in the case of the synthetic segment 3 </ b> A, the reinforcing bars 17 may be arranged in a lattice shape in the concrete 19, and the reinforcing bars 17 penetrate the vertical ribs 15. It may be arranged as follows. Moreover, the connection structure of the ring joint portion 5 between the segments 3 adjacent to each other in the tunnel axis direction as shown in FIG. 1 is not particularly limited, and a pair of main segments of the composite segment 3A shown in FIG. You may use the other structure required in order to apply the connection structure of the well-known ring joint part 5 to the girder 11.

  One set of the male joint 20 and the female joint 40 is provided for one segment 3, and the position and the number of sets in which the one set of the male joint 20 and the female joint 40 are provided are not particularly limited. .

  The male joint 20 protrudes outward from the inner side of one joint surface 14a, and includes a coupling hardware 30 having an engaging portion 33 provided substantially parallel to the tunnel axis direction at the projected tip, and the coupling hardware 30 in the tunnel circumferential direction. And at least an elastic member 25 that can be urged toward both sides.

  The female joint 40 includes an insertion hole 47 formed in the other joint surface 14b and an engaged member 49 that forms the other joint surface 14b. In the present embodiment, the engaged member 49 is the engagement member 49. The joint plate 13 has been described.

  The male side container 21 does not need to be formed in different shapes on the opening side and the bottom part 21c side, and when the outer end surface 34 of the connection hardware 30 is moved to the inner side than the one joint surface 14a, If the male side accommodation space 28 which can accommodate the axial part 31, the engaging part 33, and the holding | maintenance hardware 23 of the connection metal fitting 30 can be formed in the inside, it will not specifically limit about the shape. When the joint plates 13a and 13b are provided on both sides in the circumferential direction of the tunnel as in the case of a steel segment or a composite segment, the male housing space 28 has an insertion hole 27 for the joint plate 13a, a male housing 21 and However, when the joint plate 13 is not provided like a concrete segment, it is formed only inside the male housing 21.

  If the female side housing 41 can accommodate the distal end of the shaft 31 and the engaging portion 33 which are the distal ends of the connection hardware 30 in the female side housing space 43 formed inside thereof, the shape of the female side housing 41 is particularly limited. is not.

  The material of the male container 21 and the female container 41 is not particularly limited as long as the material can resist the external pressure from the concrete 19 filled therearound, but for example, non-ferrous metal such as aluminum, steel, cast iron, etc. From the viewpoints of strength, rigidity, and availability, iron-based metals are preferable, such as iron-based metals or fiber-reinforced plastics. When the male container 21 and the female container 41 are made of ferrous metal or non-ferrous metal, for example, they are molded by press working, casting, forging, etc., and are made of fiber reinforced plastic. Although it will shape | mold by shaping | molding etc., it does not specifically limit about the manufacturing method.

  As long as the holding hardware 23 is arranged in the male housing 21 and can be connected to the base end side of the shaft portion 31 of the connection hardware 30, the connection hardware 30 is connected to the connection hardware 30. There is no particular limitation. Further, the material and size of the holding hardware 23 are not particularly questioned.

  The holding hardware 23 and the connecting hardware 30 are preferably configured to be detachable from each other, and as a result, the storage and transportability in the previous stage of the connecting operation of the segments 3 are improved. As the means for detachably connecting the holding hardware 23 and the connecting hardware 30, any known connecting means may be adopted.

  The elastic member 25 is not particularly limited in its configuration as long as the elastic member 25 can bias the connecting hardware 30 toward the proximal end side and the distal end side of the shaft portion 31 of the connecting hardware 30. In addition to such a coil spring, it may be constituted by a spring member such as a disc spring 25 as shown in FIG. 12 (b), or may be constituted by a rubber member obtained by molding rubber such as isobrene rubber or butadiene rubber into a predetermined shape. It may be.

  Further, when the joint surface 14 of the segment 3 is abutted, the resistance force caused by the elastic member 25 when the connecting hardware 30 is pushed into the male-side accommodation space 28 is made small, and conversely, in order to prevent the opening. It is desirable to increase the resistance force by the elastic member 25 when the hardware 30 is pulled out from the male housing space 28. For this reason, it is preferable to set it as the structure of the male coupling 20 as shown in FIG.

  A male joint 20 shown in FIGS. 12A and 12B includes, as an elastic member 25, a first elastic member 25a disposed on the bottom 21c side of the male side accommodating space 28 of the male side accommodating body 21, and its male side. In the accommodation space 28, it has the 2nd elastic member 25b arrange | positioned on the outer side of one joining surface 14a rather than the 1st elastic member 25a. In addition, the connection hardware 30 of the male joint 20 is arranged such that a holding metal 23 provided on the side opposite to the tip is sandwiched between the first elastic member 25a and the second elastic member 25b.

  Further, a lid member 22 made of a plate-like member is disposed on the opening side of the male side accommodating body 21, whereby the holding hardware 23 and the elastic members 25 a and 25 b come out from the male side accommodating space 28. Is prevented. The lid member 22 is formed with an insertion hole for inserting the shaft portion 31 of the connection hardware 30.

Here, the spring constant of the second elastic member 25b is configured to be larger than the spring constant of the first elastic member 25a. In addition, the holding hardware 23 is not connected to the first elastic member 25a and the second elastic member 25b, but is merely in contact. Further, when the male joint 20 is pressed to the inside of one joint surface 14a by the other joint surface 14b of the adjacent segment 3, the second elastic member 25b and the holding hardware 23 can be separated. As a result, when the connection hardware 30 is pushed into the male-side accommodation space 28, only the first elastic member 25 a comes into contact with the holding hardware 23 and a relatively small urging force acts on the holding hardware 23. Is pulled out of the male housing space 28, the second elastic member 25b comes into contact with the holding metal 23 and a relatively large urging force acts on the holding metal 23. As a result, it is possible to reduce the resistance force when pushing in the connection hardware 30, increase the resistance force when pulling out, facilitate the connection work, and provide a joint structure with excellent water-stopping properties. . Incidentally, when exhibiting such an effect, the 1st elastic member 25a may be connected with respect to the holding | maintenance metal object 23, may be made separable, and may not be made separable.

  Note that the holding hardware 23 according to the present invention is not an indispensable configuration, and in the case of the structure shown in FIG. 7, the elastic member 25 may be coupled to the shaft portion 31 of the coupling hardware 30.

  The shape of the shaft portion 31 of the connecting hardware 30 is not particularly limited. For example, the shaft portion 31 may be embodied by a rod material such as a prismatic shape or a flat plate material in addition to a columnar shape. Moreover, the engaging part 33 of the connection hardware 30 is not specifically limited about the shape, For example, in addition to a plate-shaped board | plate material, you may be actualized by the bar material of various cross-sectional shapes. The shaft part 31 and the engaging part 33 of the connection hardware 30 may be formed by fixing bars and plates together by welding or the like, or may be formed integrally by casting or forging. Good.

  The connecting hardware 30 is made of, for example, a ferrous metal such as steel or cast iron, or a non-ferrous metal such as aluminum. When cast iron is used as the material of the connecting hardware 30, it is embodied by spheroidal graphite cast iron, flake graphite cast iron, gray cast iron, malleable cast iron, or the like. At the time of connecting the segments 3, a very large stress acts on the connection hardware 30. Therefore, the material of the connection hardware 30 is preferably composed of spheroidal graphite cast iron from the viewpoint of strength and toughness.

  The guide surface 35 of the connecting hardware 30 may be formed of a curved surface in addition to the case of being formed of a linear plane as described above.

  Further, during the connecting operation of the segments 3 to which the segment joint structure 9 of the present invention is applied, the distal end side of the shaft portion 31 and the engaging portion 33 which are the distal ends of the connecting hardware 30 in one segment 3 are accommodated in the male side. While the tip of the coupling hardware 30 is inserted into the insertion hole 47 in the other segment 3 while being accommodated in the space 28, the coupling hardware 30 in one segment 3 is not accommodated in the male-side accommodation space 28. In addition, the connecting hardware 30 may be directly inserted into the insertion hole 47 in the other segment 3.

2nd Embodiment In this Embodiment, the other connection form of the holding | maintenance metal fitting 23 and the connection metal fitting 30 is demonstrated, referring FIGS. 13-15. In addition, about the same structure as the structure demonstrated in 1st Embodiment, while attaching | subjecting the same code | symbol, the description is abbreviate | omitted.

  In this connection form, the holding hardware 60 has a through hole 61 penetrating the inside thereof, as shown in FIG. 13A, and is formed in a cylindrical shape. The holding hardware 60 is formed with a plurality of inner peripheral grooves 65 at intervals in the axial direction on the inner peripheral surface of the through hole 61. On the inner peripheral surface of the through hole 61, a guide surface 63 is formed on one end side in the axial direction. The guide surface 63 is increased in diameter toward the one end of the holding hardware 60.

  The inner circumferential groove 65 has a locking surface 65a that is substantially parallel to a direction in which one of the groove side surfaces 65a located on both sides of the groove bottom surface 65b is substantially orthogonal to the axial direction of the holding hardware 60. The other groove side surface 65c is a tapered surface 65c that is inclined with respect to a direction substantially orthogonal to the axial direction of the holding hardware 60.

  Moreover, in this connection form, as shown in FIG.13 (b), the axial part 31 of the connection metal fitting 30 is located in the front end side axial part 50 located in the front end side of an axial direction, and the proximal end side of an axial direction. The proximal end side shaft portion 51 is configured as a bar member having a diameter smaller than that of the distal end side shaft portion 50.

  As shown in FIG. 13B and FIG. 14A, a plurality of outer peripheral grooves 53 are formed in the proximal end side shaft portion 51 at intervals in the axial direction. On the base end side of the base end side shaft portion 51, a guided surface 57 having a diameter reduced toward the base end side of the base end side shaft portion 51 is formed. FIG. 14A shows a cross-sectional view taken along line B1-B1 of FIG.

  In the outer circumferential groove 53, as shown in FIGS. 13 (c) and 14 (b), a partially-notched ring-shaped spring member 55 having a shape obtained by notching a part of the ring-shaped member in the circumferential direction, It is fitted so that it can be elastically contracted. As shown in FIG. 13C, the shape and size of the spring member 55 are adjusted so that the side surface 55 a can come into contact with the groove side surface 53 a of the outer circumferential groove 53 in a normal state. . In addition, FIG.14 (b) is the B2-B2 sectional view taken on the line of FIG.13 (b).

  When connecting the holding metal 60 having such a configuration to the proximal end side shaft portion 51 of the shaft portion 31 of the connection hardware 30, first, the proximal end side shaft portion of the connection hardware 30 is inserted into the through hole 61 of the holding hardware 60. 51 is inserted. In this case, the base end side shaft portion 51 is inserted so that the guided surface 57 abuts against the opening in which the guide surface 63 of the holding hardware 60 is formed. As a result, even when there is a displacement between the two members, the proximal end side shaft portion 51 of the connection hardware 30 is guided into the through hole 61 of the holding hardware 60 by the guide surface 63 and the guided surface 57 coming into contact with each other. Will be.

  Here, as the base end side shaft portion 51 is inserted into the through-hole 61, the guide surface 63 of the holding hardware 60 comes into contact with the spring member 55 of the connection hardware 30 and the diameter of the spring member 55 is reduced. Will be pressed. When the proximal end side shaft portion 51 of the coupling hardware 30 is further inserted into the through hole 61 from here, the spring member 55 slides on the hole wall surface 65d of the through hole 61 and reaches the position of the inner circumferential groove 65. In addition, the spring member 55 expands in the inner circumferential groove 65. When the proximal end side shaft portion 51 of the coupling hardware 30 is further inserted into the through hole 61 from here, the spring member 55 is reduced in diameter again by the tapered surface 65c of the inner circumferential groove 65 and slid to the other inner circumferential groove 65. Moved.

  In this way, each spring member 55 fitted in the plurality of outer peripheral grooves 53 of the proximal end side shaft portion 51 of the connection hardware 30 is formed as shown in FIGS. 15 (a) and 15 (b). 60 is fitted in each inner circumferential groove 65. FIG. 15B shows an enlarged view within the range of the alternate long and short dash line indicated by c in FIG. As shown in this figure, after completion of the connecting operation of the holding hardware 23 and the connecting hardware 30, the side surface 55 a of the spring member 55 is aligned with the groove side surface 53 a of the outer peripheral groove 53 of the proximal end side shaft portion 51 and the holding hardware 60. It can come into contact with the locking surface 65 a of the inner circumferential groove 65. For this reason, even if the connecting hardware 30 is pulled out in the direction of the distal end side of the shaft portion 31, the connecting hardware 30 is in a state of being prevented from being detached from the holding hardware 60.

  In this connection form, since the guide surface 63 and the taper surface 65c are formed in the inner circumferential groove 65, it is possible to simply insert the proximal end side shaft portion 51 of the connection hardware 30 from one end side of the holding metal 60, and the spring. The member 55 can be easily fitted into the inner peripheral groove 65 of the holding hardware 60 and the outer peripheral groove 53 of the proximal end side shaft portion 51. For this reason, as described above, the connecting hardware 30 is not attached to the joint plates 13a and 13b in the segment 3 after manufacture at a factory or the like, and there is no member protruding from the joint plates 13a and 13b. it can. For this reason, when the segment 3 is stored and transported, the joint plates 13a and 13b on both sides thereof are not caught by other objects, and the connection hardware 30 can be prevented from being damaged. And transportability will be improved.

Third Embodiment In the present embodiment, as the segment joint structure 9 in the present invention, other forms different from the male joint 20 and the female joint 40 described in the first embodiment will be described with reference to FIGS. This will be described with reference to FIG.

  In the present embodiment, as shown in FIG. 16, the male joint 20 is provided with a protrusion 81 that protrudes toward the one joint surface 14a inside the engaging portion 33. A guide surface 35 is formed at the tip of the projecting portion 81. The guide surface 35 is a flat surface that is separated from one joint plate 13a toward the tip of the engaging portion 33. The guide surface 35 may be a curved surface.

  Further, as shown in FIG. 16, the female joint 40 is provided with a plate-like member 71 that extends in the circumferential direction of the tunnel in the female-side container 41. The plate-like member 71 is disposed inside the other joint surface 14b, and is formed with an engagement hole 73 into which the engagement portion 33 including the protrusion 81 of the connection hardware 30 can be inserted. The plate-like member 71 is arranged so as to divide the female-side accommodation space 43 formed between the inner surface of the joint plate 13b and the inner wall surface of the female-side accommodation body 41 facing the joint plate 13b into two spaces. Is.

  A process of connecting the segment 3 using the joint structure 9 of such a segment in the tunnel circumferential direction will be schematically described.

  In this case, the procedure described in the first embodiment up to the procedure for inserting the distal end side of the shaft portion 31 of the coupling hardware 30 of the male joint 20 and the engaging portion 33 into the insertion hole 47 of the female joint 40 is the same as the procedure described in the first embodiment. The same procedure is performed. After the distal end side of the shaft portion 31 of the connection hardware 30 and the engagement portion 33 are inserted into the insertion hole 47 of the female joint 40, as shown in FIG. 17, the guide surface 35 of the engagement portion 33 of the connection hardware 30 is shown. On the other hand, the hole wall edge 73a of the engagement hole 73 in the plate-like member 71 of the female joint 40 is adjusted so that it can come into contact.

  For this reason, by moving the new segment 3a on the left side in the figure in the direction A1, the guide surface 35 of the projection 81 in the connection hardware 30 with respect to the hole wall edge 73a of the plate-like member 71 of the other joint plate 13b. Is abutted. Then, by further moving the segment 3a on the left side in the drawing in the direction A1, the connection hardware 30 is pushed up in the direction A2 by the hole wall edge 73a of the plate-like member 71, and the engagement portion 33 and the projection of the connection hardware 30 are pushed. 81 reaches the engagement hole 73 of the plate-like member 71. Then, by further moving the segment 3 on the right side in the figure in the direction A1, as shown in FIG. 18, the protrusion 81 of the connection hardware 30 is inserted through the engagement hole 73 of the plate-like member 71, and the elastic member 25. Due to the elastic restoring force, the connecting metal 30 is pulled in the direction A3, the inside of the engaging portion 33 of the connecting metal 30 is engaged with the engaging hole 73 of the plate-like member 71, and the connecting operation is completed. .

  In the connection form by the joint structure 9, as shown in FIG. 18, after the connection work is completed, the inside of the engagement portion 33 of the connection hardware 30 is replaced by a plate 13 b as the engaged member 49. While being able to engage with the engagement hole 73 of the member 71, the inner surface of the protrusion 81 of the engagement portion 33 can be engaged with the side surface of the plate-like member 71. For this reason, when each segment 3 moves relatively in the tunnel axis direction, the inner surface of the projection 81 is engaged with the side surface of the plate-like member 71, so that the connection hardware 30 in one segment 3 is in the other direction. The female housing space 43 in the segment 3 is prevented from coming off. Thereby, the connection state of each segment 3 can be further strengthened.

In addition, after the connection hardware 30 in one segment 3a is accommodated in the female-side accommodation space 43 in the other segment 3b, one of the segments 3a and 3b is moved a predetermined distance in one direction in the tunnel axis direction. After being brought into the retaining state, the moved segments 3a and 3b cannot be moved in the direction opposite to the tunnel axis direction. For this reason, using this, after moving the segments 3 in one direction in the tunnel axis direction to finish the connecting operation, the segments 3 are again moved in the other direction in the tunnel axis direction again. It is possible to confirm the connection state by applying a force so that each segment 3 is not moving.

  Note that the engagement hole 73 formed in the plate-like member 71 is not limited to the case where it penetrates in the tunnel axis direction, but may be only opened at a predetermined depth in the tunnel axis direction. In this case, the connecting operation is completed in a state in which the protrusion 81 of the connecting hardware 30 is engaged with the hole wall surface of the engaging hole 73.

  Further, when the plate-like member 71 is used, it is not always necessary to provide the projection 81 on the connection metal piece 30, and the connection as described in the first embodiment with respect to the engagement hole 73 of the plate-like member 71. The inside of the engaging portion 33 of the hardware 30 may be directly engaged.

  Even when such a plate-like member 71 is used, it is possible to perform the connecting operation between the segments 3 while achieving the effects of the present invention.

Fourth Embodiment In the present embodiment, an embodiment in which the segment joint structure 9 according to the present invention is used for a steel segment will be described with reference to FIGS.

  As shown in FIG. 19, the steel segment 3B is a segment composed only of the steel shell 10 described in the first embodiment. The steel segment 3B is formed extending in the tunnel circumferential direction, and connects between a pair of main girders 11 that are spaced apart from each other in the tunnel axis direction and both ends of the pair of main girders in the tunnel circumferential direction. A pair of joint plates 13 and a pair of main girders 11 and a skin plate 16 fixed to the ends of the pair of joint plates 13 on the inner side of the tunnel are configured. In the steel segment 3B, a plurality of vertical ribs 15 substantially parallel to the joint plate 13 are arranged at intervals in the tunnel circumferential direction on the inner space side of the skin plate 16 in the tunnel.

  As shown in FIG. 20, the male joint 20 is connected to one of the joint plates 13a and 14b of the steel segments 3B adjacent to each other in the tunnel circumferential direction in the same manner as in the first embodiment. Provided.

  Here, in the steel segment 3B, since the steel shell 10 is not filled with concrete, the female side housing is accommodated inside the other joint plate 13b on the other end side in the tunnel circumferential direction without providing the female side housing body 41. A space 43 is formed. For this reason, in this Embodiment, the female side accommodating space 43 of the female coupling 40 is comprised without attaching the female side accommodating body 41 inside the other coupling board 13b.

  Even in this case, the inner side of the engaging portion 33 of the connection hardware 30 is engaged with the inner side of the other joint plate 13b. In other words, the other joint plate 13b functions as an engaged member 49 with which the engaging portion 33 of the connecting hardware 30 is engaged.

  The operation of connecting the steel segments 3B configured as described above in the tunnel circumferential direction is performed in the same procedure as that described in the first embodiment. FIG. 21 shows a state after the steel segments 3B adjacent to each other are connected.

Even in this case, as described above, the segment coupling operation can be performed while preventing the male joint 20 from being damaged or deformed, and the advantageous effect of the present invention can be achieved. Incidentally, in this way, when the present invention is applied to the steel segment 3B, the female-side container 41 can be omitted, and the configuration necessary for the connection between the segments can be further simplified. Become.

  Even in the case where the present invention is applied to the steel segment 3B, the female side accommodating body 41 is disposed inside the other joint plate 13b, and the inner wall surface of the female side accommodating body 41 and the periphery of the female side accommodating space 43 are arranged. Of course, it may be surrounded by the inner surface of the other joint plate 13b.

Fifth Embodiment In the present embodiment, an embodiment in which the segment joint structure 9 according to the present invention is used for a concrete segment will be described with reference to FIGS.

  As shown in FIG. 22, the concrete segment 3 </ b> C is a concrete structure formed so as to have an arc plate shape in a side view and a rectangular shape in a plan view. A plurality of reinforcing bars (not shown) are arranged in the concrete segment 3C in the tunnel circumferential direction and the tunnel axis direction. The concrete segment 3C is formed using, for example, a mold having an inner shape substantially the same as the outer shape of the concrete segment 3C to be molded, and after temporarily placing reinforcing bars at predetermined positions in the mold, Molded by filling the frame with concrete.

  When the tunnel lining body is constructed, the concrete segment 3C makes contact with one joint surface 14a located on one end side in the tunnel circumferential direction and the other joint surface 14b located on the other end side in the tunnel circumferential direction. It is arranged in contact.

  As shown in FIG. 23, the concrete segment 3C having such a configuration is provided with a plurality of male joints 20 on one joint surface 14a and a plurality of female joints 40 on the other joint surface 14b.

  The male joint 20 in the present embodiment is similar to the male joint 20 described in the first embodiment, as shown in FIG. 23, and a male-side container 21 arranged on the inner side of one joint surface 14a. The holding hardware 23 and the elastic member 25 disposed in the male housing 21 and a connection hardware 30 connected to the holding hardware 23 are provided.

  In the male joint 20 in the first embodiment, the opening edge 21a of the male housing 21 is fixed to the inside of the joint plate 13a, whereas the male joint 20 in the present embodiment is the male side. The opening edge 21a of the container 21 is exposed from one joining surface 14a.

  As shown in FIG. 23, the female joint 40 includes an insertion hole 47 formed in the other joint surface 14b and a female-side container 41 disposed inside the other joint surface 14b.

  The insertion hole 47 is adjusted in shape, size, and the like so that the distal end side of the shaft portion 31 of the connection hardware 30 and the engagement portion 33 can be inserted.

  The female container 41 is opened by the insertion hole 47 and is formed in a box shape opened toward the outside of the other joint surface 14b. The female container 41 is arranged in a state in which the opening edge 41a is exposed toward the outside of the other joint surface 14b. In the female-side container 41, a female-side accommodation space 43 that accommodates the distal end side of the shaft portion 31 that is the distal end of the connection hardware 30 and the engaging portion 33 is formed.

  A plate-like member 71 extending in the tunnel circumferential direction is disposed in the female-side container 41. The plate-like member 71 has an engagement hole 73 penetrating in the tunnel axis direction. The plate-like member 71 is arranged in place of the engaged member 49 made of the joint plate 13b in which the inside of the engaging portion 33 of the connection hardware 30 can be engaged in the first embodiment and the like. As described in the third embodiment, when the segment 3 is connected, the inside of the engaging portion 33 of the connecting hardware 30 can be engaged with the engaging hole 73.

  The operation of connecting the concrete segments 3C configured as described above in the tunnel circumferential direction is performed in the same procedure as that described in the first and third embodiments. FIG. 24 shows a state after segments adjacent to each other are connected.

  Even in this case, as described above, the segment coupling operation can be performed while preventing the male joint 20 from being damaged or deformed, and the advantageous effect of the present invention can be achieved.

  When the present invention is applied to the concrete segment 3C, a joining end plate that forms a substantially same plane as the other joining surface 14b is fixed to the opening edge 41a of the female container 41, and this joining is performed. The end plate may be engaged with the inside of the engaging portion 33 of the connection hardware 30 of the male joint 20 as the engaged member 49 as described in the first embodiment. In this case, this joining end plate forms a part of the other joining surface 14b. In addition, even when the plate-like member 71 is provided after providing this joining end plate, the engagement hole 73 of the plate-like member 71 is formed inside the engagement portion 33 of the connection hardware 30 when the segments 3 are connected. Instead of this, it may be possible to engage with the joining end plate.

DESCRIPTION OF SYMBOLS 1 Shield tunnel 3 Segment 3A Composite segment 3B Steel segment 3C Concrete segment 4 Segment ring 5 Ring joint part 7 Segment joint part 9 Segment joint structure
DESCRIPTION OF SYMBOLS 10 Steel shell 11 Main girder 13 Joint board 14 Joint surface 15 Vertical rib 16 Skin plate 17 Reinforcement 19 Concrete 20 Male joint 21 Male side receiving body 21a Opening edge 21c Bottom part 22 Cover material 23 Holding metal part 23a Female thread part 25 Elastic member 27 Insertion hole 28 Male side accommodation space 30 Connecting metal 31 Shaft part 33 Engagement part 34 Outer end face 35 Guide surface 37 Male thread part 39 Engagement surface 40 Female joint 41 Female side accommodation body 41a Opening edge 43 Female side accommodation space 45 Engaged surface 47 Insertion hole 47a Hole wall edge 49 Engaged member 50 Front end side shaft portion 51 Base end side shaft portion 53 Outer peripheral groove 53a Groove side surface 55 Spring member 55a Side surface 57 Guided surface 60 Holding hardware 61 Through hole 63 Guide surface 65 Inner peripheral groove 65a groove side surface (locking surface)
65b groove bottom surface 65c groove side surface (tapered surface)
65d Hole wall surface 71 Plate-like member 73 Engagement hole 81 Projection

Claims (10)

A joint structure of a segment, which is composed of a male joint and a female joint provided on one joint surface and the other joint surface of the segments adjacent to each other in the tunnel circumferential direction, and which can connect the segments adjacent in the tunnel circumferential direction. In
The male joint protrudes outward from the inside of the one joint surface, and includes a coupling hardware having an engaging portion provided substantially parallel to the tunnel axis direction at the projected tip, and the coupling hardware on both sides in the tunnel circumferential direction. An elastic member that can be biased toward
The female joint includes an insertion hole formed in the other joint surface, and an engaged member that forms the other joint surface,
The male joint accommodates the connection hardware that is moved to the inside of the one joint surface by being pressed by the other joint surface when the joint surfaces of the segments to be coupled are brought into contact with each other. Further comprising a possible accommodation space,
When the joint surface is moved relative to the tunnel axis direction from the state in which the joint surfaces of the segments to be coupled are in contact with each other, the joint hardware is accommodated in the housing space. The distal end of the coupling metal is inserted into the insertion hole by being pressed by the elastic member, and the inner side of the engaging portion of the connection hardware inserted through the insertion hole is further moved in the tunnel axis direction. A joint structure for a segment, characterized in that it can be engaged with an engaging member. The joint structure for a segment according to claim 1, wherein a guide surface is formed on the inner side of the engaging portion of the connecting hardware so as to be separated from the one joint surface toward the tip. The joint structure of a segment according to claim 1 or 2, wherein the engaged member is a joint plate provided in a tunnel circumferential direction of the segment. The female joint is further provided with a plate-like member that is disposed inside the engaged member and has an engagement hole into which the engaging portion of the coupling hardware can be inserted.
4. The connection hardware according to claim 1, wherein an inner side of the engaging portion can be engaged with an engagement hole of the plate-like member instead of the engaged member. The segment joint structure described in 1. The female joint is further provided with a plate-like member that is disposed on the inner side of the other joining surface instead of the engaged member, and has an engagement hole into which the engaging portion of the coupling metal can be inserted,
3. The segment according to claim 1, wherein an inner side of the engaging portion of the connecting hardware is engageable with an engaging hole of the plate-like member instead of the engaged member. Joint structure. The engagement hole of the plate member is penetrated in the tunnel axis direction,
The segment joint structure according to claim 4 or 5, wherein a projecting portion that projects toward the one joint surface is provided inside the engaging portion of the connecting hardware. The segment joint structure according to any one of claims 1 to 6, wherein the connecting hardware is detachably attached to the one joint surface. The segmented joint structure according to any one of claims 1 to 7, wherein the elastic member includes a coil spring, a disc spring, or a rubber member. The male joint, as the elastic member, is disposed on the outer side of the one joining surface than the first elastic member in the housing space, and a first elastic member disposed in the housing space. A second elastic member having a spring constant larger than that of the elastic member,
The connecting hardware of the male joint further has a holding hardware arranged in the accommodating space sandwiched between the first elastic member and the second elastic member on the side opposite to the tip thereof, and the adjacent segment The joint structure for a segment according to any one of claims 1 to 8, wherein the second elastic member and the holding hardware are separable when pressed against the other joint surface of the segment. . The male joint according to any one of claims 1 to 9 is provided on one joining surface in the segment circumferential direction, and the female joint according to any one of claims 1 to 9 is provided on the other side in the segment circumferential direction. A segment characterized by having a joint surface.

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