JP4629550B2 - Connecting structure for connecting recess and connecting member of connecting recess - Google Patents

Description

  The present invention provides a connection recess formed on a curved inner surface of a segment in a connection portion between segments used for constructing a shield tunnel, and a closing member for a connection recess that closes an opening portion of a connection recess provided in a structure or the like. The present invention relates to a connecting structure of segments having a closing structure.

When constructing a shield tunnel, a segment is used as a material for tunnel construction, but this segment has a different structure depending on the condition of the ground and the intended use of the tunnel. Various structures for connecting the segments are prepared according to the structure. Some of the segments are made of concrete, but in concrete segments, the end edge portion is provided with a connection recess formed in a concave shape, and the inside of the connection recess and the outside of the end edge of the segment are provided. Adjacent segments are connected to each other by passing a bolt through a bolt hole that passes through and fastening the bolt.
The connection recess is composed of a member in a substantially rectangular box shape made of metal, and each of the connection recesses arranged at the end edge portion of the segment is connected by a hook-shaped member, and has an integral structure, and The segment is covered with concrete and prevented from corroding, and the segment has a curved plate-like structure.

That is, in the tunnel mine constructed with segments, the bolts for connecting the segments are exposed in the connection recesses, so that the connection recesses are filled with mortar or the like so that the bolts do not corrode. Or, as shown in Patent Document 1 below, this connection recess is covered and covered, and the space inside the connection recess in this lid is filled with a filler, etc., preventing corrosion of bolts and the like as fastening members, and The inner surface of the tunnel was smooth.
Japanese Patent Laid-Open No. 7-305595

  However, in the conventional segment connection structure described above, mortar or the like is simply filled and filled, and there is a risk of dropout or damage due to age deterioration. In the structure of the connecting portion shown in Patent Document 1 described above, the connecting recess is formed so that the lid member does not easily fall off from the connecting recess. A groove-like engagement portion is formed in the opening edge portion of the lid, and the edge portion of the lid member is fitted.

  In addition to the structure described in Patent Document 1 and the like, as shown in FIG. 13, a resin anchor nut 104 is provided in advance on the bottom surface of the connection recess 103 of the segment 101 connected by the bolt and nut 102, and the resin anchor nut 104 is provided there. 14 is screwed as shown in FIG. 14 so that the bolt 105 is implanted in the connecting recess 103, and a lid member 106 is attached to the tip of the bolt 105 with a nut 107 and filled with a filler 108. However, since the segment 101 must be manufactured so that the anchor nut 104 is embedded in the segment 101 itself, it is very complicated, and the accuracy when the anchor nut 104 is embedded is not high. When the connecting recess 103 is closed, the position of the bolt 105 tip and the lid member 106 is not accurate. There was also disadvantages.

  Accordingly, in order to solve the above-described problems, the present invention provides a connection recess closure member having a structure for easily and accurately closing a connection recess formed at an end portion of a segment. An object of the present invention is to provide a segment connection structure that can reliably support the lid member covering the connection recess.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
According to a ninth aspect of the present invention, the connecting recess closing member is located on the inner side surface of the connecting concave portion 3 provided in the structure 1 or the like as a segment used in the segment connecting structure according to any one of the first to eighth aspects. A mounting base 11 that engages the bolt 7 and / or the nut 8;
A rotating portion 16 that is rotatably attached to the mounting base 11 so that the axial direction is substantially the same as the axial direction of the bolt 7 and / or the nut 8;
An elongated hole 20 provided in the rotating portion 16 and having a longitudinal direction substantially the same as the axial direction;
Both ends have male screw portions, and one end portion 23a passes through the long hole 20 and is slidable in the longitudinal direction with respect to the long hole 20, and is fixed by nut members 26 and 27. A support shaft 23 extending substantially to the center in the vicinity of the opening of the connection recess 3 and having the other end 23b substantially orthogonal to the axial direction;
The opening of the connection recess 3 is closed, and a hole 31 through which the other end 23b of the support shaft 23 passes is provided at a substantially center, and is fixed by a nut member 37 that is screwed to the other end 23b. A lid 30;
It is characterized by comprising.

  According to the closing member for the connection recess, the mounting base 11 is engaged with the bolt 7 head and / or the nut 8 located on the inner surface of the connection recess 3, and the rotation of the rotation unit 16 and the rotation unit with this as a reference position. 16 and the slot 20 is slidably provided in the slot 20, so that the position of the support shaft 23 can be adjusted. It becomes possible to adjust the relative position with the provided hole 31. As a result, the position of the support shaft 23 that supports the lid 30 can be adjusted back and forth, left and right, and up and down. Since the extension state of the support shaft 23 from the bolt 7 and / or the nut 8 and the distance from the bolt 7 and / or the nut 8 can be adjusted, the hole 31 formed in the approximate center of the lid 30 The other end 23b of the support shaft 23 is surely passed, and the nut member 37 can be screwed and fastened to be fixed. Further, the lid 30 is securely held by the support shaft 23, and the lid 30 is disposed in the opening of the connection recess 3.

In the closing structure of the connection recess, the mounting base 11 includes a recess 12 into which the head of the bolt 7 and / or the nut 8 is fitted, and the recess 12 includes a magnet 10.

  According to this connection recess closing structure, the bolt 7 in the connection recess 3 and / or the nut 8 are engaged by the magnetic force of the magnet 10 in the recess 12 of the mounting base 11. Thereby, with respect to the bolt 7 and / or the nut 8, the mounting base 11, the rotating portion 16, and the support shaft 23 do not easily fall off, and can be reset at the time of mounting, and The support of the lid 30 is ensured.

In the closing structure of the connection recess, the mounting base 11 includes a recess 12 into which the head of the bolt 7 and / or the nut 8 is fitted, and an outer peripheral surface of the head and / or the nut 8 in the recess 12. A locking piece 51 that is elastically locked is provided.

  According to the closing structure of the connection recess, the locking piece 51 in the recess 12 of the attachment base 11 is engaged with the bolt 7 head and / or the nut 8 in the connection recess 3. Thereby, it becomes possible to make the attachment operation | work of the attachment base 11 with respect to the volt | bolt 7 and / or the nut 8 an easy operation | work only of the fitting which resists elasticity.

The connecting recess closing structure has a recess 32 into which a nut member 37 screwed to the other end 23b of the support shaft 23 is fitted around the hole 31 of the lid 30. The cap 40 attached to 32 is provided.

  According to the closed structure of the connecting recess, the cap 40 is provided in the recess 32 provided around the hole 31 of the lid 30, whereby the end 23 b of the support shaft 23 and the nut positioned substantially at the center of the lid 30. The member 37 can be obscured.

In the closing structure of the connecting recess, the support shaft 23 is adjusted by fixing the penetrating length with respect to the long hole 20 with the nut members 26 and 27 screwed from the one end portion 23a. The extension length of 23b is adjustable.

  According to the closed structure of the connection recess, sliding movement is possible with respect to the long hole 20, and the penetrating length with respect to the long hole 20 can be adjusted, and the extension length of the other end 23b can be adjusted. It can be freely fixed.

Coupling structure segment according to claim 1, wherein the present invention is a connecting structure for connecting the segments 1 to each other to build a shield tunnel, in one of the adjacent segments are embedded nut-like member 9 is provided on its end face The other segment is provided with a connecting recess 3 formed in a concave shape at the edge of the curved inner surface 1a, and a bolt 7 is screwed to the embedded nut-like member 9 through the side wall of the connecting recess 3. In the segment connection structure in which the segments 1 are connected to each other,
A mounting base 11 engaged with the head of the bolt 7 located in the connection recess 3;
A rotating part 16 that is attached to the mounting base part 11 so as to be rotatable about the same direction as the axial direction of the bolt 7;
An elongated hole 20 provided in the rotating portion 16 and having a longitudinal direction substantially the same as the axial direction;
Both ends have male screw portions, and one end portion 23a passes through the long hole 20 and is slidable in the longitudinal direction with respect to the long hole 20, and is fixed by nut members 26 and 27. A support shaft 23 extending substantially to the center in the vicinity of the opening of the connection recess 3 and having the other end 23b substantially orthogonal to the axial direction;
The opening of the connection recess 3 is closed so as to be substantially flush with the curved inner surface 1a of the segment 1, and a hole 31 through which the other end 23b of the support shaft 23 passes is provided at the center. A lid 30 fixed by a nut member 37 screwed to the end 23b;
A filler 41 filled in the space inside the connection recess 3 covered with the lid 30;
It is characterized by comprising.

  According to the connecting structure of the segments, the mounting base 11 is engaged with the bolt 7 heads for connecting the segments 1 located in the connection recess 3, and the rotation of the rotating part 16 is performed using this as a reference position. The position of the support shaft 23 can be adjusted by adjusting the long hole 20 provided in the rotating portion 16 and the slide position adjustment with respect to the long hole 20. It becomes possible to adjust the relative position with the provided hole 31. As a result, the position of the support shaft 23 that supports the lid 30 can be adjusted back and forth, left and right, and up and down. Since the extension state of the support shaft 23 from the bolt 7 and the distance from the bolt 7 can be adjusted, the hole 31 formed in the approximate center of the lid body 30 is surely attached to the hole 31. The other end 23b is in a penetrating state, and the nut member 37 can be screwed and fastened to be fixed. Further, the lid 30 is securely held by the support shaft 23, and the lid 30 is disposed in the opening of the connection recess 3, whereby the filler 41 is filled in the space inside the connection recess 3 that is closed by the lid 30. Is done.

The segment connection structure according to claim 2 is characterized in that the mounting base 11 is provided with a recess 12 into which a head of the bolt 7 is fitted, and a magnet 10 is provided in the recess 12.

  According to the connecting structure of the segments, the bolt 7 in the connection recess 3 is engaged with the magnetic force of the magnet 10 in the recess 12 of the mounting base 11. Thereby, the mounting base 11, the rotating unit 16, and the support shaft 23 are not easily dropped from the bolt 7, and can be reset during the mounting operation. Ensure support.

The segment connection structure according to claim 3 , wherein the mounting base 11 includes a recess 12 into which the head of the bolt 7 is fitted, and the latch 12 is elastically locked to the outer peripheral surface of the head in the recess 12. A piece 51 is provided.

  According to the connecting structure of the segments, the bolt 7 in the connection recess 3 is engaged with the locking piece 51 in the recess 12 of the attachment base 11. Thereby, it becomes possible to make the attachment operation | work of the attachment base 11 with respect to the volt | bolt 7 an easy operation | work only of the fitting which resists elasticity.

According to a fourth aspect of the present invention, the connecting structure of the segments includes the connecting recesses 3 formed in a concave shape at the adjacent edge portions of the curved inner surface 1a of the segment 1 constituting the shield tunnel. In the connecting structure of the segments that pass through the side walls of the connecting recesses 3 and connect the segments 1 with bolts 7 and nuts 8, respectively.
A bolt 7 head located in the connection recess 3 and a mounting base 11 engaged with the nut 8;
A rotating part 16 that is attached to the mounting base part 11 so as to be rotatable about the same direction as the axial direction of the bolt 7;
An elongated hole 20 provided in the rotating portion 16 and having a longitudinal direction substantially the same as the axial direction;
Both ends have male screw portions, and one end portion 23a passes through the long hole 20 and is slidable in the longitudinal direction with respect to the long hole 20, and is fixed by nut members 26 and 27. A support shaft 23 extending substantially to the center in the vicinity of the opening of the connection recess 3 and having the other end 23b substantially orthogonal to the axial direction;
The opening of the connection recess 3 is closed so as to be substantially flush with the curved inner surface 1a of the segment 1, and a hole 31 through which the other end 23b of the support shaft 23 passes is provided at the center. A lid 30 fixed by a nut member 37 screwed to the end 23b;
A filler 41 filled in the space inside the connection recess 3 covered with the lid 30;
It is characterized by comprising.

  According to the connecting structure of the segments, the mounting base 11 is engaged with the bolt 7 head and the nut 8 for connecting the segments 1 located in the connection recess 3, and this is used as a reference position. The position of the support shaft 23 can be adjusted by the rotation and the adjustment of the long hole 20 provided in the rotation part 16 and the slide position with respect to the long hole 20, and the position of the support shaft 23 can be adjusted by adjusting the position of the support shaft 23. It becomes possible to adjust the relative position with the hole 31 drilled at substantially the center. As a result, the position of the support shaft 23 that supports the lid 30 can be adjusted back and forth, left and right, and up and down. And since the extension state of the support shaft 23 from the bolt 7 and the nut 8 and the distance from the bolt 7 and the nut 8 can be adjusted, the hole portion 31 drilled in the approximate center of the lid body 30 includes: The other end 23b of the support shaft 23 is surely passed through, and the nut member 37 can be screwed and fastened to be fixed. Further, the lid 30 is securely held by the support shaft 23, and the lid 30 is disposed in the opening of the connection recess 3, whereby the filler 41 is filled in the space inside the connection recess 3 that is closed by the lid 30. Is done.

In the segment connection structure according to claim 5 , the mounting base 11 includes a recess 12 into which the head of the bolt 7 and the nut 8 are fitted, and the recess 12 includes a magnet 10. .

  According to the connecting structure of the segments, the bolt 7 head and the nut 8 in the connection recess 3 are engaged with the magnetic force of the magnet 10 in the recess 12 of the mounting base 11. As a result, the mounting base 11, the rotating unit 16, and the support shaft 23 are not easily dropped from the bolt 7 and the nut 8, and can be reset during the mounting operation. And the support of the lid 30 is ensured.

In the segment connecting structure according to claim 6 , the mounting base 11 includes a recess 12 into which the head of the bolt 7 and the nut 8 are fitted, and the outer surface of the head and the nut 8 in the recess 12. A locking piece 51 for elastic locking is provided.

  According to the connecting structure of the segments, the bolt 7 head and the nut 8 in the connection recess 3 are engaged by the locking pieces 51 in the recess 12 of the mounting base 11. Thereby, it becomes possible to make the attachment work of the attachment base 11 to the bolt 7 and the nut 8 an easy work of only fitting that resists elasticity.

In the segment connection structure according to claim 7, a recess 32 into which a nut member 37 screwed to the other end 23 b of the support shaft 23 is fitted is provided around the hole 31 of the lid 30. A cap 40 is provided to be attached to the recess 32.

  According to the connecting structure of the segments, the cap 40 is provided in the concave portion 32 provided around the hole 31 of the lid 30, whereby the end 23 b of the support shaft 23 positioned at the approximate center of the lid 30 and the nut member. 37 can be obscured.

In the segment connecting structure according to claim 8 , the support shaft 23 is configured to adjust and fix the penetrating length with respect to the elongated hole 20 with the nut members 26 and 27 screwed from one end 23 a. The extension length of the end portion 23b is adjustable.

  According to the connecting structure of the segments, the support shaft 23 can be slid with respect to the long hole 20 and can be adjusted in the penetrating length with respect to the long hole 20, and the other end 23b can be extended. The length can be adjusted and fixed.

In the closing member for the connection recess according to the ninth aspect of the present invention, the mounting base is engaged with the bolt and / or the nut for the connection located in the connection recess of the structure having the connection recess, and this is used as the reference position. As described above, the position of the support shaft can be adjusted by the rotation of the rotation portion, the long hole provided in the rotation portion, and the slide position with respect to the long hole, and by adjusting the position of the support shaft, It is possible to adjust the relative position with respect to the drilled hole, that is, it is possible to adjust the position of the support shaft that supports the lid body in the front-rear, left-right, and up-down directions. As a result, the structure of the connection recess portion is provided with a lid, so that the structure around the connection recess of the structure becomes smooth, and the attachment structure of the lid to the connection recess is based on the position of the bolt and / or nut. It is supported by the mounting base, the rotating part, and the support shaft so that it will not easily fall off. Furthermore, there is no need for complicated operations and processes such as providing embedded nuts to which the support shaft is screwed in advance on the main body side of the structure, etc., and the bolts and / or nuts provided on the structure are used as a reference. Since the extension state of the support shaft from the bolt and / or the distance from the nut can be adjusted, the other end of the support shaft is surely in a through state in the hole drilled in the approximate center of the lid, The nut member can be screwed and fastened to be fixed.

In the closing member for the connection concave portion, the magnet is provided in the concave portion of the attachment base portion, so that the magnet is attached to the bolt head and / or the nut in the connection concave portion. As a result, the mounting base portion, the rotating portion, and the support shaft do not easily fall off from the bolt and / or nut, and can be reattached during the mounting operation, and the lid can be supported. A certain effect can be obtained.

In the closing member of the connection recess, the bolt base and / or nut in the connection recess is engaged by the locking piece in the recess of the mounting base, and the mounting base is attached to the bolt and / or nut. It becomes possible to make it an easy operation of only fitting that resists elasticity. The attachment base portion is configured to be easily prevented from being pulled out and removed by the elastic locking piece, and the attachment base portion is attached to the bolt head and / or the nut without wobbling by the elasticity. As described above, the position of the support shaft can be adjusted with reference to the base, and the lid can be securely attached.

In the closing member for the connection recess described above , the cap is provided in the recess provided around the hole of the lid body, so that the end portion of the support shaft and the nut member that are located approximately at the center of the lid body are thereby arranged. Can be obscured. Moreover, it can be made to be substantially flush with the surface of the lid, and as a surface of the construction part or the like, in addition to the effect of providing the lid, a smooth surface without unevenness can be configured.

In the closing member for the connection recess described above , the support shaft can be slid with respect to the long hole, and the penetrating length with respect to the long hole can be adjusted, and the extension length of the other end can be adjusted. It can be freely fixed with a nut member.

In the segment connecting structure according to the first aspect of the present invention, the mounting base is attached to the bolt head for connecting the segments located in the connecting recess, and the rotation of the rotating portion is set as a reference position. The position of the support shaft can be adjusted by the long hole provided in the rotating portion and the extension length with respect to the long hole. By adjusting the position of the support shaft, the hole formed in the approximate center of the lid body Can be adjusted, that is, the position of the support shaft that supports the lid can be adjusted back and forth, right and left, and up and down. Thereby, the structure of the connection concave portion includes the lid, so that the curved inner surface of the segment becomes smooth, and the attachment structure of the lid to the connection concave portion is based on the position of the bolt for connecting the segments to each other. It is supported by the mounting base, the rotating part, and the support shaft so that it will not easily fall off. Furthermore, there is no need for complicated operations and processes such as providing an embedded nut to which the support shaft is screwed in advance on the segment body side, and the bolt for connecting the segments to each other is used as a reference. Since the extended state and the distance from the bolt can be adjusted, the other end of the support shaft is surely passed through the hole drilled in the approximate center of the lid so that the nut can be screwed and fastened. Fixing is possible. Further, in a state where the filler is filled, the mounting base, the rotating portion, and the support shaft are supported by the filler, and the lid body is in a similar state to the bolt connected state by these members and falls off carelessly. In addition, the occurrence of problems such as water immersion is prevented by applying a caulking agent.

In the segment connecting structure according to the second aspect , since the magnet is provided in the concave portion of the attachment base portion, the magnet is engaged with the bolt head in the connection concave portion by the magnetic force of the magnet. As a result, the mounting base, the rotating part, and the support shaft do not easily fall off from the bolt, and can be remounted during the mounting operation, and the lid is reliably supported. To obtain the effect.

In the segment connecting structure according to claim 3 , the bolt head in the connection recess is engaged by the locking piece in the recess of the mounting base, and the mounting work of the mounting base on the bolt is resistant to elasticity. It is possible to perform an easy operation only by fitting. The attachment base portion is configured to be easily prevented from being pulled out by the locking piece having elasticity, and the attachment base portion is attached to the bolt head without wobbling by elasticity, and this attachment base portion is used as a reference. In addition, as described above, the position of the support shaft can be adjusted to ensure the attachment of the lid.

In the segment connecting structure according to the fourth aspect of the present invention, the mounting base is engaged with the bolt head and the nut for connecting the segments located in the connection recess, and the rotation of the rotating portion is performed using this as a reference position. And the position of the support shaft can be adjusted by the long hole provided in the rotating part and the slide position with respect to the long hole, and the hole formed in the substantially center of the lid by adjusting the position of the support shaft In other words, the position of the support shaft that supports the lid can be adjusted back and forth, right and left, and up and down. Thereby, the structure of the connection concave portion includes the lid, so that the curved inner surface of the segment becomes smooth, and the attachment structure of the lid to the connection concave portion positions the bolts and nuts for connecting the segments to each other. It is supported by the mounting base, the rotating part, and the support shaft with reference to the above, and will not easily fall off. Furthermore, there is no need for complicated operations and processes such as providing an embedded nut to which the support shaft is screwed in advance on the segment body side, and the bolt and nut for connecting the segments to each other as a reference. Since the extension state of the support shaft and the distance from the bolt and the nut can be adjusted, the other end of the support shaft is surely passed through the hole formed in the approximate center of the lid, and the nut member Can be screwed and fastened and fixed. In addition, in the state filled with the filler, the mounting base, the rotating portion, and the support shaft are supported by the filler, and the lid body is similar to the connected state to the bolt and the nut by these members, so that it is careless. Occurrence of problems such as water immersion is prevented by applying a caulking agent.

In the segment connecting structure according to the fifth aspect , since the magnet is provided in the concave portion of the attachment base portion, the magnet is engaged with the bolt head and the nut in the connection concave portion by the magnetic force of the magnet. As a result, the mounting base, rotating part, and support shaft do not easily fall off from the bolts and nuts, and can be reattached during the mounting operation, and the lid is reliably supported. It is possible to obtain an advantageous effect.

In the segment connecting structure according to claim 6 , the bolt base and the nut in the connection concave portion are engaged by the locking pieces in the concave portion of the mounting base, and the mounting base is attached to the bolt and the nut. It becomes possible to make it an easy operation of only fitting that resists elasticity. The mounting base is configured to be easily prevented from being pulled out by the locking piece having elasticity, and the mounting base is mounted without wobbling with respect to the bolt head and the nut by elasticity. As described above, the position of the support shaft can be adjusted, and the lid can be securely attached as described above.

In the segment connecting structure according to claim 7 , since the cap is provided in the concave portion provided around the hole of the lid body, the end portion of the support shaft and the nut member which are located approximately at the center of the lid body thereby. Can be obscured. Moreover, it can be formed substantially flush with the surface of the lid, and as an inner peripheral surface of the segment, in addition to the effect of providing the lid, a smooth surface without unevenness can be configured.

In the segment connecting structure according to claim 8 , the support shaft can be slid with respect to the elongated hole, and the length of the other end can be extended by adjusting the penetrating length with respect to the elongated hole. Is adjustable and can be fixed with a nut member.

FIG. 1 is a sectional view showing an embodiment of a segment connection structure according to the present invention, FIG. 2 is a schematic perspective view of a segment in which the connection structure is used, and FIG. 3 is an exploded perspective view of each part constituting the connection structure. It is.
First, the segment 1 is a curved substantially rectangular plate-shaped concrete member, and a connection recess 3 is provided in the vicinity of the periphery of the inner surface 1a, and a fixing hole penetrating the connection recess 3 and the outer surfaces 4a and 4b. 5 is provided. The outer side surface is composed of front and rear ring surfaces 4a along the circumference of the peripheral wall and upper and lower piece surfaces 4b along the length direction, and a pair of concave grooves (not shown) are continuous on each surface 4a, 4b. Formed. In each of the grooves formed in the ring surface 4a and the piece surface 4b, a belt-like sealing material 6 having elasticity is stuck so as to have a continuous annular shape. This sealing material 6 is formed by blending a rubber component such as synthetic rubber or natural rubber with a water-expandable resin or the like and extruding it into a predetermined cross-sectional shape.

A plurality of connection recesses 3 are arranged along the ring surface 4a and the piece surface 4b which are the outer surfaces, and each of the connection recesses 3 is formed in a substantially rectangular box shape with one side opened. Although not shown in the figure, each connection recessed part 3 is connected by the streak member inside the segment main body covered with concrete, and is integrated substantially. A fixing hole 5 is drilled from the inner side surface in the connecting recess 3 to the outer side surfaces 4a and 4b of the segment 1 so as to be located at the approximate center of the inner side surface.
The segments 1 are joined with the ring surfaces 4a and the piece surfaces 4b facing each other, and the bolt 7 penetrates the fixing hole 5 from one of the connection recesses 3 and is fastened with the nut 8 on the other side. Fixed.

Next, the connection structure of the present invention is roughly constituted by the mounting base portion 11, the rotating portion 16, the support shaft 23, the lid body 30, and the filler 41.
The attachment base 11 is made of a hard resin and is formed in a substantially columnar shape. The attachment base 11 is formed with a concave portion 12 on one end surface and a connecting convex portion 13 on the other end surface. The concave portion 12 at one end is formed in a bottomed concave portion having substantially the same shape as the head of the bolt 7 for connecting and fixing the segments 1 described above or the outer shape of the nut 8 screwed to the bolt 7, that is, a hexagonal bottom. The depth of the recess 12 is set to be substantially the same as or slightly shorter than the height of the bolt 7 or the nut 8. In addition, in this recessed part 12, the magnet 10 is provided in the innermost part of the recessed part 12, for example. Moreover, the connection convex part 13 of the other end is formed in a slightly small-diameter columnar shape with respect to the attachment base main body, and the concave groove 14 is continuously formed in the circumferential direction on the outer peripheral surface near the end part.

  The rotating portion 16 is made of a hard resin equivalent to the mounting base 11 and is formed in a substantially cylindrical shape substantially equal to the outer diameter of the mounting base 11, and the connecting convex portion 13 of the mounting base 11 is fitted at one end. A fitting recess 17 having an inner diameter is formed. The fitting concave portion 17 is provided with a retaining convex portion 18 on at least a part of the inner peripheral surface. And the connection convex part 13 of the attachment base part 11 fits in this fitting recessed part 17 so that an axial direction may correspond, and the ditch | groove 14 and the prevention convex part 18 are mutually fitted and connected. In the connected state, the retaining protrusions 18 in the recessed grooves 14 are prevented from coming off easily, and the retaining protrusions 18 can slide along the recessed grooves 14, that is, mounted around the axis. The base portion 11 and the rotating portion 16 can be rotated relative to each other in the circumferential direction. The attachment base 11 and the rotation portion 16 are connected to each other by, for example, forming a notch portion connected to the concave groove 14 at the tip of the connection convex portion 13 of the attachment base 11 in the axial direction so that the rotation portion 16 is attached to the attachment base portion. 11 may be configured such that the retaining convex portion 18 is guided into the concave groove 14, or the connecting convex portion 13 of the mounting base portion 11 is press-fitted into the rotating portion 16 without providing a notch groove or the like. It is good also as a structure which makes it the coupling | bonding by making the removal convex part 18 fit in the ditch | groove 14, and making it carry out.

  In the present embodiment, as shown in FIGS. 1 and 3, a support arm 19 is provided at the other end of the rotating portion 16 so as to extend in the axial direction. The support arm 19 is formed with a long hole 20 penetrating perpendicularly to the axial direction. The long hole 20 is formed so that the longitudinal direction of the inner diameter is the same as the longitudinal direction of the support arm 19, that is, the axial direction of the rotating portion 16. As shown in FIG. 3, the support arm 19 includes a pair of flat surfaces 19 a that are vertically positioned in the present embodiment and are orthogonal to the penetration direction of the long hole 20.

  The support shaft 23 is a straight shaft rod-like member made of hard resin and having male screw portions at both ends, like the mounting base portion 11 and the rotating portion 16. One end 23 a of the support shaft 23 passes through the long hole 20 of the support arm 19, and the other end 23 b extends in a direction substantially orthogonal to the support arm 19 (upward in the drawing). Is attached to the support arm 19 as described above. In the present embodiment, as shown in FIG. 3, a flange-like support collar 25 is formed at the other end 23b. The support shaft 23 is slidable in the longitudinal direction with respect to the long hole 20, and the support arm 19 which is above and below the long hole 19 is formed on the male screw portion of the one end 23 a passing therethrough. Nuts 26 and 27 are screwed at both positions sandwiching the pin, and the extension length of the support shaft 23 with respect to the support arm 19 is fixed. That is, the extension length of the support shaft 23 with respect to the support arm 19 can be varied at the screwing positions of the nuts 26 and 27. The pair of nuts 26 and 27 are also made of resin and abut against the flat surfaces 19a of the support arm 19 described above.

The lid body 30 is formed in a substantially rectangular flat plate shape made of a hard synthetic resin, and a hole 31 is formed through substantially the center as shown in FIGS. Each length of the horizontal width and the vertical width of the lid body 30 is formed so as to substantially correspond to the opening shape of the connection concave portion 3 formed in the segment 1. A fastening portion 32 as a concave portion formed in a concave shape is formed around the hole portion 31 on the front surface side of the lid body 30, and a step portion 33 corresponding to the fastening portion 32 is formed on the back surface of the lid body 30. Projected. Further, as shown in FIGS. 4C and 4D, substantially straight slit grooves 34 extending from the step portion 33 to the four corners are formed on the back surface of the lid body 30. The slit groove 34 is open at each corner. In the state where the lid 30 is arranged in the connection recess 3 of the segment 1, the other end 23 b of the support shaft 23 penetrates the hole 31, and the step of the lid 30 is inserted into the support flange 25 of the support shaft 23. The portion 33 is placed, and a hexagon nut member 37 as a nut member is screwed in the fastening portion 32 to be fixed to the support shaft 23.
The fastening portion 32 of the lid 30 is formed in a circular shape, and is external to the nut member 37 that is screwed and fastened to the other end 23b of the support shaft 23 protruding through the substantially central hole 31. The fastening portion 32 is used as a tool insertion portion when the nut member 37 is fastened, and a cap 40 that conceals the fastening portion 32 is fitted and closed. Is done.

  The filler 41 is made of a hard foamed urethane resin or the like, and is filled in the space in the connection recess 3 that is closed by the lid body 30. In addition, as this filler, you may comprise as cement, mortar, an epoxy resin, etc.

Next, the construction procedure in the segment connection structure will be described.
The mounting base 11 and the rotating portion 16 are connected in advance, the elongated hole 20 of the rotating body 16 and the support shaft 23 are temporarily assembled, and the support shaft 23 is orthogonal to the support arm 19. It is attached and temporarily fixed with a pair of nuts 26 and 27.
The segments 1 are constructed in the tunnel almost simultaneously with the tunnel excavation, and each segment 1 extends along the circumferential direction a of the tunnel and the length direction b of the tunnel, in the adjacent segment 1 and in the connection recess 3. The bolt 7 and the nut 8 are fastened and fixed. After all the segments 1 are connected, or after the connection construction of the segments 1, the construction in each connection recess 3 is performed.

  As shown in FIG. 5, first, the attachment base 11 is attached to the bolt 7 head or the nut 8 located on the inner surface of the connection recess 3 after the segments are connected. The mounting base 11 is mounted so as to be fitted to the bolt 7 because the recess 12 is substantially the same as the outer shape of the bolt 7. Further, since the attachment base 11 is provided with the magnet 10, it is engaged with the bolt 7 by a magnetic force, and is prevented from falling off.

  When the placement of the mounting base 11 is finished, the extension length of the support shaft 23 is adjusted as shown in FIG. The length of the support arm 19 is such that the pair of nuts 26, 27 screwed to one end 23 a of the support shaft 23 is rotated so that the other end 23 b of the support shaft 23 is positioned substantially at the center of the connection recess 3. The hole 20 is slid, and the screwing positions of the nuts 26 and 27 are adjusted so that the other end 23b is at the same height as the opening edge of the connection recess 3 or a position slightly below. Adjustment is made so as to extend substantially perpendicular to the support arm 19 of the portion 16.

  Next, as shown in FIG. 7, urethane foam 41 is injected into the bottom of the connection recess 3. The amount of the urethane foam 41 injected is such that the volume in the connection recess 3 is sufficiently filled after the foam expansion, for example, the foamed urethane before the expansion immediately after the injection is about 2/3 of the connection recess volume from the bottom. Is set.

  Next, the lid is quickly attached while the injected urethane foam is gradually expanding. As shown in FIG. 8, the lid body 30 has the peripheral end edge thereof related to the stepped portion 3 a formed at the opening edge of the connection recess 3, and the other end of the support shaft 23 in the substantially central hole portion 31. 23b penetrates, and it is attached so that the step part 33 of the cover body 30 may be mounted in the support collar part 25 of the support shaft 23, and the connection recessed part 3 internal space is formed. Immediately after the lid 30 is attached, the nut member 37 is screwed to the other end 23b of the support shaft 23 that protrudes through the hole 31 of the lid 30. The nut member 37 is located in the fastening portion 32 of the lid body 30, and the fastening portion 32 is clamped between the support flange portion 25 of the support shaft 23 and the nut member 37 by fastening the nut member 37, that is, the lid body. 30 is fixed to the support flange 25 in a state where the substantial center is supported.

  After the nut member 37 is fastened, the urethane foam 41 that expands in the connection recess 3 space after a predetermined time elapses is filled in the connection recess 3 almost without any gap, and the connection recess 3 and the lid 30 are connected to each other. Urethane foam leaks out through a slight gap such as a gap or a gap between the support shaft 23 and the nut member 37 (reference numeral 41a in FIG. 9).

  The surplus foaming urethane 41a leaking out from each gap is confirmed, and the surplus foaming urethane 41a is cured, whereby the filling of the space in the connecting recess 3 is completed.

The surplus foamed urethane 41a leaking from the gap and cured is removed by cutting or the like using a cutting tool such as a cutter or a knife.
Next, as shown in FIG. 10, a cap 40 is fitted and attached to the fastening portion 32 of the lid 30, and the other end portion 23 b and the nut member 37 of the support shaft 23 are covered and covered. The fastening portion 32 is closed, and is substantially flush with the surface of the lid 30 (see FIG. 1).

  Next, an epoxy resin caulking agent or the like is applied to the gap between the peripheral portion of the lid 30 and the opening edge of the connection recess 3 and the peripheral edge of the cap 40 to completely fill the gap. And it is completed by finishing the curing of this caulking agent.

  Therefore, in the segment connecting structure configured as described above, the mounting base 11 is engaged with the head of the bolt 7 for connecting the segments 1 located in the connection recess 3, and this is used as a reference position, and the rotating portion 16. The position of the support shaft 23 can be adjusted by the rotation of the support shaft 19, the elongated hole 20 of the support arm 19 extended to the rotating portion 16, and the extended length with respect to the elongated hole 20. The relative position with respect to the hole 31 formed in the approximate center of the lid body 30 can be adjusted, that is, the position of the support shaft 23 that supports the lid body 30 can be adjusted in the front-rear direction, the left-right direction, and the vertical direction. . Thereby, since the structure of the connection recessed part 3 part is provided with the cover body 30, the curved inner surface of the segment 1 becomes smooth, and the attachment structure of the cover body 30 to the connection recessed part 3 connects the segments 1 to each other. The bolt 7 is supported by the mounting base 11, the rotating part 16, and the support shaft 23 on the basis of the position of the bolt 7 so that it will not easily fall off. Furthermore, there is no need for complicated operations and processes such as providing an embedded nut to which the support shaft is screwed in advance on the segment body side as in the prior art, and this is based on the bolt 7 for connecting the segments 1 to each other. Since the extension state of the support shaft 23 from the bolt 7 and the distance from the bolt 7 can be adjusted, the other end 23b of the support shaft 23 is surely provided in the hole portion 31 formed in the approximate center of the lid 30. Becomes a through state, and the nut member 37 can be screwed and fastened to be fixed. In the state where the filler 41 is filled, the mounting base 11, the rotating portion 16, and the support shaft 23 are supported by the filler 41, and the lid 30 is bolted 7 by these members 11, 16, and 23. It is the same as the connected state, so that it does not fall off inadvertently, and the application of a caulking agent prevents the occurrence of problems such as water immersion.

  In the above-described embodiment, the example in which the attachment base 11 is attached to the heads of the bolts 7 that connect the segments 1 to each other and the respective parts are attached is described, but the nut 8 side (see FIG. 5) is also the same. It is the same as the above by attaching so that the concave portion 12 of the attachment base 11 is fitted to the nut 8.

  Further, in the above-described embodiment, the example of the configuration in which the magnet 10 is provided in the recess of the mounting base 11 and is engaged with the bolt 7 by magnetic force has been described. For example, it may be provided with a locking piece 51 as shown in FIG. The structure of the locking piece 51 is inclined and inwardly extended on the inner peripheral edge of the base 51a formed in an endless ring shape using a hard resin material or stainless steel material having a spring property. For example, as shown in FIG. 11 (a), the structure is constituted by six locking pieces 51 so as to contact each outer peripheral surface of the bolt 7, and the inclination direction is set to the insertion direction of the bolt 7 into the recess 12. Thus, after insertion, the tip of each locking piece 51 bites into the outer peripheral surface of the bolt as shown in FIG. Thereby, the attachment base 11 is attached to the head of the bolt 7 without wobbling, and the position of the support shaft 23 can be adjusted with the attachment base 11 as a reference, as described above.

  Furthermore, in the above-described embodiment, the description has been given as an example of the structure in which the connection recesses 3 are provided on the four sides around the segment 1, but one side as shown in FIGS. A similar structure can be adopted for the segment 1 which is the connecting recess 3 and is provided with the embedded nut-like member 9 on the opposite side edge.

In the above-described embodiment, an example in which the support shaft 23 is fixed to the elongated hole 20 with a pair of upper and lower nuts 26 and 27 screwed to the support shaft 23 has been described. Of the nuts 26 and 27, the upper nut 26 can be omitted, that is, a flange-like member is configured in a fixed state in the middle of the support shaft 23 in the same manner as the support flange 25. It is good. According to this configuration, the support shaft 23 can be slid along the longitudinal direction of the long hole 20, and can be fixed to the long hole 20 by fastening operation of only the lower nut 27. Such a configuration is effective when the extension length of the support shaft 23 from the long hole 20 is predetermined. That is, when the arrangement position of the long hole 20 in the connection recess 3 is determined to be a certain length from the opening of the connection recess 3, there is no need to operate the upper nut 26 or a flange-like portion instead of this, This simplifies the mounting operation and simplifies the configuration of the parts. Therefore, according to the configuration of the above-described embodiment provided with the nuts 26 and 27 on the upper and lower sides, the extension length from the long hole 20 can be set to a desired length, and versatility is improved. Is possible.
Furthermore, the fixing means for the long hole 20 of the support shaft 23 may have other configurations, and is not limited to the configuration of the nuts 26 and 27 described above.

It is sectional drawing which shows one Embodiment in the connection structure of the segment by this invention. It is a schematic perspective view of the segment in which the connection structure is used. It is a disassembled perspective view of each part which comprises the connection structure. A plan view of the lid constituting the connection structure is (a), a cross-sectional view taken along line II in the plan view (b), a bottom view (c), and a cross-sectional view taken along the line II-II in the bottom view (d). It is the figure shown in. It is sectional drawing which shows the construction procedure of a connection structure. It is sectional drawing which shows the construction procedure of a connection structure. It is sectional drawing which shows the construction procedure of a connection structure. It is sectional drawing which shows the construction procedure of a connection structure. It is sectional drawing which shows the construction procedure of a connection structure. It is sectional drawing which shows the construction procedure of a connection structure. It is the figure which showed the schematic front view which shows other embodiment in (a), and sectional drawing in (b). It is the figure which showed the perspective view which shows the other structure of a segment in (a), and showed the sectional view of the connection part in (b). It is sectional drawing which shows the connection structure of the conventional segment. It is sectional drawing which shows the connection structure of the conventional segment.

DESCRIPTION OF SYMBOLS 1 ... Segment 1a ... Inner surface 3 ... Connection recessed part 7 ... Bolt 8 ... Nut 9 ... Embedded nut-like member 10 ... Magnet 11 ... Mounting base 12 ... Recessed part 16 ... Rotating part 20 ... Long hole 23 ... Support shaft 23a ... One end Part 23b ... The other end 30 ... Lid 31 ... Hole 32 ... Recess (fastening part)
37 ... Nut member 40 ... Cap 41 ... Filler 51 ... Locking piece

Claims (9)

A connecting structure for connecting segments constructing a shield tunnel, wherein one adjacent segment is provided with an embedded nut-like member on its end face, and the other segment has a concave connecting recess formed on the curved inner surface. In the segment connecting structure in which the segments are connected to each other by being screwed into the embedded nut-like member through the side wall of the connection recess,
A mounting base engaged with a bolt head located in the connection recess;
A rotating portion that is rotatably attached to the mounting base portion with the substantially same direction as the axial direction of the bolt as an axial direction;
An elongated hole provided in the rotating portion and having a longitudinal direction substantially the same as the axial direction;
Both ends have male threaded parts, and one end of the elongated hole passes through the elongated hole and is slidable in the longitudinal direction and fixed with a nut member, and substantially orthogonal to the axial direction And the other end of the support recess extending to the approximate center near the opening of the connection recess,
The opening of the connection recess is closed so as to be substantially flush with the curved inner surface of the segment, and a hole through which the other end of the support shaft passes is provided at the substantially center, and is screwed to the other end. A lid fixed by a nut member;
A filler filled in the space in the connection recess covered with the lid;
A segment connecting structure characterized by comprising: Wherein the mounting base portion, the coupling structure of segment of claim 1, wherein the head of the bolt provided with a recess that fits, characterized in that the magnet is provided in the recess. The said mounting base provided with a recess the head of the bolt is fitted, according to claim 1, wherein the locking piece is provided to resiliently retaining the outer circumference surface of the head into the recess Segment connection structure. In the curved inner surfaces of the segments constructing the shield tunnel, adjacent end edges are provided with concave connecting recesses, and the segments are passed through the side walls of the adjacent connecting recesses by bolts and nuts. In the segment connection structure
A bolt head located in the connection recess and a mounting base engaged with the nut;
A rotating portion that is rotatably attached to the mounting base portion with the substantially same direction as the axial direction of the bolt as an axial direction;
An elongated hole provided in the rotating portion and having a longitudinal direction substantially the same as the axial direction;
Both ends have male threaded parts, and one end of the elongated hole passes through the elongated hole and is slidable in the longitudinal direction and fixed with a nut member, and substantially orthogonal to the axial direction And the other end of the support recess extending to the approximate center near the opening of the connection recess,
The opening of the connection recess is closed so as to be substantially flush with the curved inner surface of the segment, and a hole is formed through the other end of the support shaft at the substantially center, and is screwed to the other end. A lid fixed by a nut member;
A filler filled in the space in the connection recess covered with the lid;
A segment connecting structure characterized by comprising: The segment connection structure according to claim 4 , wherein the attachment base includes a recess into which the head of the bolt and a nut are fitted, and a magnet is provided in the recess. The mounting base includes a recess into which the head of the bolt and a nut are fitted, and a locking piece that elastically locks to the outer peripheral surface of the head and the nut in the recess. Item 5. A connecting structure of segments according to item 4 . The cap body is provided around the hole portion of the lid body with a recess into which a nut member screwed to the other end portion of the support shaft is fitted, and a cap attached to the recess. The segment connection structure according to any one of 1 to 6 . The support shaft is a nut member screwed from one end portion, and the extension length of the other end portion is adjustable by adjusting and fixing the penetrating length with respect to the elongated hole. The segment connection structure according to any one of claims 1 to 7 . In closing member used in the coupling structure of segment according to any one of claims 1 to 8, a mounting base portion which engaged with the bolt and or nut positioned in the connecting recess side provided in the segment,
A rotating portion that is rotatably attached to the mounting base with the substantially same direction as the axial direction of the bolt and / or nut as the axial direction;
An elongated hole provided in the rotating portion and having a longitudinal direction substantially the same as the axial direction;
Both ends have male threaded parts, and one end of the elongated hole passes through the elongated hole and is slidable in the longitudinal direction and fixed with a nut member, and substantially orthogonal to the axial direction And the other end of the support recess extending to the approximate center near the opening of the connection recess,
A lid that closes the opening of the connection recess, has a hole through which the other end of the support shaft passes, and is fixed by a nut member screwed to the other end;
A closing member for a connection recess, comprising:

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