JP4776350B2 - Segment joint structure - Google Patents

Description

  The present invention relates to a joint structure between the ring of each segment constituting each segment ring for shield tunnel lining.

  As a conventional joining structure, for example, as shown in FIG. 8, a male joint 32 in which a joining projection 31 protrudes from the joining surface 30a is provided on the joining surface 30a of one segment 30 to be joined. In addition, it is generally known that a female joint 34 having a bonding recess 33 formed on the bonding surface 30a is provided on the bonding surface 30a of the other segment 30 to be bonded (JP-A-6-146794). See the official gazette).

  However, the convex part for joining of the male joint in such a conventional joining structure is configured by projecting a substantially rod-shaped projection on the joining surface of one segment to be joined. For this reason, there has been a problem such that the joining convex portion protruding from the joining surface is bumped and deformed during construction such as joining the segments.

In addition, the “joint” at the time of joining the convex joint for joining the male joint and the concave joint for joining the female joint was also absorbed by the joint convex part for joining the male joint. The structure is apt to become “simple”.
JP-A-6-146794

  The problem to be solved is that the male joint joint protrusion in the segment joint structure is easy to deform during construction, and the male joint joint protrusion is also This means that it tends to be “complicated” in a complicated structure, and the entire joint structure of the segments is made in a complicated structure and has poor workability.

  The present invention was devised in view of the above-mentioned circumstances, and an object thereof is to provide a joining structure of segments having a good workability while simplifying the joining projection of the male joint.

The joint structure of the segment according to claim 1 of the present application is
The segment ring for shielding tunnel lining is formed by fitting the joint convex part of the male joint of one segment to be joined to the joint concave part of the female joint of the other segment to be joined. It is a joint structure that joins the rings of each segment,
The female joint joint recess is a support ring which is loosely fitted in the case portion of the outer peripheral portion and held by an elastic spacer interposed between the case portion and the case portion. It has a double pipe structure from the
The support ring portion has an inner peripheral surface extending from the small-diameter portion on the joint projection side of the male joint and the large-diameter portion on the opposite side of the joint projection portion toward the joint projection side. It is formed in a tapered shape,
Inside the support ring portion, it can freely move forward and backward in the direction of the joint convex portion, and is biased in the direction of the small diameter portion and held at the position of the small diameter portion. A fitting part that fits the convex part is attached,
The fitting portion is formed such that its inner diameter is freely expandable and contractible, and is held in a reduced diameter state when held at the position of the small diameter portion, and at the time of fitting of the projection for joining the male joint, It moves to the large diameter part side opposite to the convex part for joining, and is expanded in diameter, and it is trying to hold the fitting state of the convex part for joining,
Leave manufactured so loosely in the support ring part in said casing portion is increased, between the said casing part supporting ring section, in addition to the spacer of the elastic body, the steel adjustment member By changing the size of the adjusting material interposed between the case portion and the support ring portion, the size of the loosely fitted state in the case portion of the support ring portion can be freely set. It is characterized in that it can be adjusted.

Segment bonded structure of the invention, together with to project the joining recess of higher female joint of structural originally rigidity from the joint surface, a structure in which it retracts the joint projection of the male coupling from the joint surface, junction The joint surface in the inter-ring direction of one segment to be provided is provided with a female joint in a state in which the concave portion for bonding projects from the joint surface, and the joint surface in the inter-ring direction of the other segment to be joined Is provided with a male joint in a state in which the convex part for joining projects in the concave part formed on the joint surface. Then, the joints of the male joints are fitted into the joints of the female joints to join the rings of each segment .

In addition, by inserting an elastic body between the case part with the double pipe structure in the joint recess for the female joint and the support ring part, absorbing the "ra" during construction only on the female joint side The joint for the male joint has a simple structure.

The female joint joint recess into which the male joint joint projection is fitted is loosely fitted in the outer peripheral case portion and the case portion, and is interposed between the case portion. and a supporting ring portion held in the spacer of the elastic body that has a double pipe structure.

Furthermore, in the joint structure of the invention, loosely fitted in the support ring portion in the case portion, i.e., leave fabricated to "play" is increased in the case of the support ring portion, the support ring The size of the “rattling (free fit)” in the case portion of the portion can be freely adjusted by changing the size of the adjusting material interposed between the case portion and the case portion.

That is, an adjustment material is interposed between the case portion and the support ring portion in addition to the elastic spacer, and by freely changing the size of the adjustment material, the support ring portion can be loosely fitted in the case portion. The size of the state can be adjusted.

Therefore, without changing the dimensions of each member in the bonding structure, it is economical because it can adjust the loosely in the case of the support ring portion, quickly loosely fitted in the support ring portion according to the construction conditions Can be adjusted.

  In addition, because the support ring part moves independently, the play of the inner diameter of the support ring part is reduced, so that it is aligned when inserting the convex part for joining the male joint and can be securely fastened. It is.

According to claim 2 of the present application, in the segment joining structure according to claim 1, the adjustment material is provided at an inner surface position of the case portion, and a loose fitting state is formed between the adjustment ring portion and the support ring portion. It is characterized by. This state is shown in FIG.
As described above, in the joining structure of the present invention, the joining concave portion for projecting the highly rigid female joint protrudes from the joining surface, and the joining convex portion for the male joint is retracted from the joining surface, By using a double pipe structure for the joints for the joints of the mold joints, the “work” at the time of construction is absorbed only by the female joints, thereby improving the workability when joining each segment.

According to the joining structure of the segment of this invention, it is set as the structure which protruded the convex part for joining of the male type | mold joint from the joining surface while protruding the concave part for joining of a highly rigid female type | mold joint. Furthermore, a double pipe structure joining recess in the female joint, it is a "backlash" during construction can be absorbed only by the female coupling side.

Therefore, the joint for the joint of the male joint can be made into a simple and simple pin shape, the entire joint structure of the segments can be simplified, and the workability when joining each segment is improved. Can be made.
In addition to the elastic spacer, an adjustment material is interposed between the case portion and the support ring portion. By changing the size of the adjustment material, the support ring portion can be loosely fitted in the case portion. You can adjust the size of the state. Therefore, it is economical because the loose fit state in the case portion of the support ring portion can be adjusted without changing the dimensions of each member in the joining structure, and the free fit state of the support ring portion can be quickly determined according to the construction situation. Can be adjusted.

[Example 1]
FIG. 1 is a schematic sectional view showing a state before joining of each segment in the segment joining structure of the present invention, and FIG. 2 is a schematic sectional view showing a joining state of each segment in the segment joining structure of the present invention. FIG. 4 is a schematic cross-sectional view showing a state before joining of each segment in the joint structure according to another embodiment of the present invention, FIG. 4 is a schematic cross-sectional view showing a joint state of each segment in the joint structure of FIG. 3, and FIG. FIG. 6 is a schematic sectional view showing a state before joining of each segment in the joining structure of still another embodiment of the present invention. FIG. 6 is a schematic sectional view showing a joining state of each segment in the joining structure of still another embodiment of the present invention. 7 is an enlarged view of part A in FIG. 5, and FIG. 8 is a schematic cross-sectional view showing a conventional joining structure of segments.

  In each figure, reference numeral 1 is a joint structure, 2 is a segment, 3 is a recess for joining a female joint, 4 is a female joint, 6 is a convex part for joining a male joint, and 7 is a joint. It is a male fitting.

  As shown in FIGS. 1 and 2, the segment bonding structure 1 is a bonding structure between the rings of the segments 2 constituting the segment rings (not shown) for shielding tunnel lining.

  The joint surface 2a in the inter-ring direction of one segment 2 to be joined is provided with a female joint 4 with a joining recess 3 protruding from the joint surface 2a, and the other segment 2 to be joined. The joint surface 2a in the inter-ring direction is provided with a male joint 7 in a state in which the joint convex portion 6 protrudes in the storage concave portion 5 formed on the joint surface 2a.

  Then, the joints 6 of the male joint 7 are fitted into the joint recesses 3 of the female joint 4 to join the rings of the segments 2.

  The joint recess 3 of the female joint 4 in this embodiment has a double-pipe structure from a case portion 8 at the outer peripheral portion and a support ring portion 10 loosely fitted in the case portion 8. At the same time, the loose spacer 9 in the case portion 8 of the support ring portion 10 is held by the elastic spacer 9 interposed between the case portion 8 and the elastic spacer 9.

  The support ring portion 10 in this embodiment has an inner peripheral surface 10 a with a small-diameter portion 10 b on the joining convex portion 6 side of the male joint 4 and a large-diameter portion 10 c on the opposite side of the joining convex portion 6. And formed from. And the small diameter part 10b is formed in the taper shape in the direction of the convex part 6 for joining.

  A fitting portion 11 into which the joining convex portion 6 is fitted is mounted inside the support ring portion 10. The fitting portion 11 can freely move back and forth in the direction of the bonding convex portion 6 and is urged toward the small diameter portion 10b so that the fitting portion 11 is positioned in the small diameter portion 10b of the support ring portion 10. Is retained.

  The fitting portion 11 in this embodiment has an inner diameter that can be expanded and contracted, is in a reduced diameter state when being held at the position of the small diameter portion 10 b, and is fitted to the joining convex portion 6 of the male joint 7. At the time of joining, it moves to the large diameter part 10c side on the opposite side to the convex part 6 for joining, and diameter-expands, and the fitting state of the convex part 6 for joining is hold | maintained.

  The urging portion 12 that urges the fitting portion 11 in this embodiment toward the small diameter portion 10 b of the support ring portion 10 is formed inside the large diameter portion 10 c of the support ring portion 10. It is comprised with the spring member provided between the rear cover 13 and the fitting part 11 which were provided in.

  In this embodiment, the case portion 8 in the bonding recess 3 is fixed to the segment 2 by the anchor bar 14 and protrudes approximately half from the bonding surface 2a. A front cover 15 provided on the male joint 4 side inside the case portion 8 and having a joining insertion hole 15a through which the male pin bolt as the joining convex portion 6 passes, and the case portion 8 A supporting ring portion 10 is provided between the rear lid 13 provided on the side opposite to the male joint 4.

  The joint convex part 6 of the male joint 7 in this embodiment is a simple-shaped male pin bolt, and is inserted by an insert 16 so that the protruding tip part is accommodated in the concave part 5 for storage formed in the joint surface 2a. It is fixed to segment 2.

  In such a segment joining structure 1 according to the present invention, each segment 2 is joined by first moving the segment 2 in the inter-ring direction as shown in FIG. Is inserted into the bonding recess 3 of the female joint 4.

  When the bonding convex portion 6 is inserted into the bonding concave portion 3, as shown in FIG. 2, the male pin that is the bonding convex portion 6 is used for bonding the front lid 15 provided on the case portion 8. It fits through the insertion hole 15a while expanding the diameter of the fitting part 11.

  And the fitting state to this fitting part 11 (OSPIN bolt) to the fitting part 11 is hold | maintained in the internal position of the small diameter part 10b of the ring part 10 for a support by the biasing part 12. As a result, the fitting portion 11 tries to reduce the diameter, and the fitting state of the joining convex portion 6 to the fitting portion 11 is also maintained.

  From these things, as shown in FIG. 2, joining of each one segment 2 which should be joined in the direction between rings is performed.

  As described above, according to the segment joining structure 1 of the present invention, the joining concave portion 3 of the highly rigid female joint 4 is projected, and the joining convex portion 6 of the male joint 7 is retained from the joining surface 2a. By doing so, problems such as bumping and deforming the bonding convex portion 6 during construction are eliminated, and workability is improved.

  In addition, the joint recess 3 of the female joint 4 has a double-pipe structure, and an elastic spacer 9 is inserted between the case portion 8 and the support ring portion 10 to provide a “gat” during construction. By absorbing the female joint 4, the joining convex portion 6 of the male joint 7 has a simple structure.

[Example 2]
3 and 4 show another embodiment of the segment joining structure 1 of the present invention.

  The biasing portion 12 in this embodiment is a hollow cylindrical shape provided between the rear lid 13 provided on the case portion 8 and the fitting portion 11 inside the large-diameter portion 10c of the support ring portion 10. It is comprised with the elastic body formed in the substantially cylindrical shape.

  The other configurations of the embodiment shown in FIGS. 3 and 4 and the joining state of each segment are the same as those of the embodiment shown in FIGS. 1 and 2 described above.

[Example 3]
5 and 6 show still another embodiment of the segment joining structure 1 of the present invention.

  In this embodiment, the case portion 8 in the joint recess 3 of the female joint 4 is fixed to the segment 2 with anchor bolts 17. The anchor bolt 17 has a bolt head 17 a located in the segment 2, and a bolt screw portion 17 b screwed into a rear lid 13 provided on the opposite side of the case portion 8 from the male joint 4. Yes.

  The support ring portion 10 in this embodiment is held loosely in the case portion 8 by an elastic spacer 9 interposed between the case portion 8 and the case portion 8. It is hold | maintained so that the magnitude | size of the loose-fit state in the case part 8 can be adjusted with the adjustment material 18 (refer FIG. 7) which is the steel high elastic bodies intervened between.

  In this embodiment, the rear lid 13 provided on the opposite side of the case portion 8 from the male joint 4 has the same configuration as the front lid 15 provided on the male joint 4 side inside the case portion 8, and its joining The bolt screw portion 17b of the anchor bolt 17 is screwed into a female screw formed in a portion corresponding to the insertion hole 15a.

In such this embodiment, the loosely fitted state of the supporting ring section 10 of the inside case portion 8 (ye) leave largely manufactured by changing the size of the adjustment member 18, the case of the support ring portion 10 The loose fitting state in the part 8 can be freely adjusted.

  Therefore, it is economical because the loose fitting state can be adjusted without changing the dimensions of each member of the joining structure 1, and the loose fitting state can be quickly adjusted according to the construction situation.

  In the embodiment shown in FIGS. 5 and 6, the other configurations and the joining states of the segments are the same as those in the embodiment shown in FIGS.

It is a schematic sectional drawing which shows the state before joining of each segment in the joining structure of the segment of this invention. It is a schematic sectional drawing which shows the joining state of each segment in the joining structure of the segment of this invention. It is a schematic sectional drawing which shows the state before joining of each segment in the joining structure of another form of this invention. It is a schematic sectional drawing which shows the joining state of each segment in the joining structure of the form of FIG. It is a schematic sectional drawing which shows the state before joining of each segment in the joining structure of another form of this invention. It is a schematic sectional drawing which shows the joining state of each segment in the joining structure of another form of this invention. It is the A section enlarged view of FIG. It is a schematic sectional drawing which shows the joining structure of the conventional segment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joining structure 2 Segment 2a Joining surface 3 Joining recessed part 4 Female joint 5 Storage recessed part 6 Joining convex part 7 Male joint 8 Case part 9 Spacer 10 Supporting ring part 10a Inner peripheral surface 10b Small diameter part 10c Large diameter part DESCRIPTION OF SYMBOLS 11 Fitting part 12 Energizing part 13 Back cover 14 Anchor muscle 15 Front cover 15a Joining insertion hole 16 Insert 17 Anchor bolt 17a Bolt head 17b Bolt screw part 18 Adjustment material

Claims (2)

The segment ring for shielding tunnel lining is formed by fitting the joint convex part of the male joint of one segment to be joined to the joint concave part of the female joint of the other segment to be joined. It is a joint structure that joins the rings of each segment,
The female joint joint recess is a support ring which is loosely fitted in the case portion of the outer peripheral portion and held by an elastic spacer interposed between the case portion and the case portion. It has a double pipe structure from the
The support ring portion has an inner peripheral surface extending from the small-diameter portion on the joint projection side of the male joint and the large-diameter portion on the opposite side of the joint projection portion toward the joint projection side. It is formed in a tapered shape,
Inside the support ring portion, it can freely move forward and backward in the direction of the joint convex portion, and is biased in the direction of the small diameter portion and held at the position of the small diameter portion. A fitting part that fits the convex part is attached,
The fitting portion is formed such that its inner diameter is freely expandable and contractible, and is held in a reduced diameter state when held at the position of the small diameter portion, and at the time of fitting of the projection for joining the male joint, It moves so as to move to the large-diameter portion side opposite to the bonding projection, and the fitting state of the bonding projection is maintained.
Leave manufactured so loosely in the support ring part in said casing portion is increased, between the said casing part supporting ring section, in addition to the spacer of the elastic body, the steel adjustment member By changing the size of the adjusting material interposed between the case portion and the support ring portion, the size of the loosely fitted state in the case portion of the support ring portion can be freely set. Segment joining structure characterized by being adjustable. The segment connecting structure according to claim 1, wherein the adjustment member is provided at an inner surface position of the case portion and forms a loose fit state with the support ring portion.

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