JP5782392B2 - Seal structure between tunnels - Google Patents

Description

  The present invention relates to an inter-tunnel seal structure provided between a preceding tunnel and a succeeding tunnel constructed next to the preceding tunnel.

  In recent years, after constructing multiple small cross-section tunnels, unnecessary lining of each tunnel is removed to form a large space, while the remaining lining of each tunnel is used to construct the top plate and sidewall A technique for constructing a large-section tunnel is known by forming, for example. The plurality of small-section tunnels are sequentially constructed with a time difference, and the succeeding tunnel is constructed next to the preceding tunnel. Each tunnel is constructed by, for example, a propulsion method.

  Here, the propulsion method is a method of constructing a tunnel by sequentially press-fitting a cylindrical propulsion box (tunnel box), which becomes a tunnel lining, into the ground from a wellhead. In addition, a blade edge, an excavation machine, etc. are attached to the front-end | tip of a propulsion box. The propulsion method excavator may be one that digs itself by taking a reaction force on the propulsion box (that is, one that is equipped with a propulsion jack), or the thrust of the main jack transmitted through the propulsion box You may dig by.

  Of the two adjacent tunnels, a seal member is provided along the propulsion direction on the outer surface of the succeeding tunnel facing the preceding tunnel (see, for example, Patent Document 1). As shown in FIG. 4, the conventional seal member 100 includes a base portion 101 that is fixed to the outer surface of the trailing tunnel 110 a and a lip portion 102 that is formed integrally with the base portion 101. The tip of the lip portion 102 faces the outside of the large section tunnel, and is configured to be elastically pressed toward the outer surface of the preceding tunnel 110b by water pressure from the outside of the large section tunnel.

JP 2010-133100 A

  In the seal structure as in Patent Document 1, the seal member is fixed to the trailing tunnel by a mounting bracket. Here, although the seal member is in close contact with the surface of the preceding tunnel, since it is only pressed at both ends in the width direction, there is a possibility that a gap that becomes a water channel may be generated. There was a possibility that water performance could not be obtained. In particular, when the water pressure from the outside of the large section tunnel is applied to the lip portion, the outer end (base) side of the base portion 101 is pulled inward as shown by a double line arrow in FIG. Michi was easy to occur.

  From such a viewpoint, it is an object of the present invention to provide an inter-tunnel seal structure that can obtain sufficient water stopping performance.

The invention according to claim 1 for solving such a problem is provided on the surface of the succeeding tunnel in an inter-tunnel seal structure provided between the preceding tunnel and the succeeding tunnel constructed next thereto. A seal member, a plurality of seal fittings for fixing the seal member to the succeeding tunnel, an elastic band member provided on the surface of the preceding tunnel, and fixing the elastic band member to the preceding tunnel A plurality of belt member mounting brackets for extending the seal member along the propulsion direction of the succeeding tunnel, projecting toward the preceding tunnel side, the tip of which contacts the preceding tunnel, The seal mounting bracket has a seal pressing plate portion that presses the seal member toward the trailing tunnel, and at least one of the plurality of the seal mounting brackets The said surface facing the seal member of the seal pressing plate portion of the seal mounting bracket, the and ridges are formed along the extending direction of the seal member, the elastic strip member, the tip of the sealing member The band member mounting bracket has a band member pressing plate portion that presses the elastic band member toward the preceding tunnel, and at least one of the plurality of band member mounting brackets A band member protrusion is formed on a surface of the band member pressing plate portion of the band member mounting plate facing the elastic band member along the extending direction of the elastic band member. It is an inter-seal structure.

According to such a structure, since the seal member can be pressed intensively by providing the protrusions on the seal pressing plate portion, sufficient water stopping performance can be obtained. Furthermore, since the surface pressure by which the band member protrusions press the elastic band member becomes high, sufficient water stopping performance can be obtained even on the preceding tunnel side.

  The invention according to claim 2 is characterized in that the seal member includes a base portion fixed to the following tunnel and a lip portion that rises obliquely from the base portion toward the preceding tunnel, It is provided in the both ends of the said base part in the width direction, The said protrusion is formed in the said seal press board part of the said seal mounting bracket located in the natural ground side.

  According to such a configuration, even if the natural mountain side of the seal member is pulled inward, the seal member can be pressed by the ridge, so that the seal member is difficult to move and a gap is hardly formed. In addition, the water can be stopped at a position close to the natural ground, and the water does not enter inside, so that the water stopping performance can be further improved.

  The invention according to claim 3 is characterized in that a water-expandable water-stopping material is provided in a gap between the seal pressing plate portion formed around the protrusion and the seal member.

  According to such a configuration, water can be stopped even at portions other than the protrusions, so that the water stopping performance can be further enhanced.

The invention according to claim 4 is characterized in that the band member mounting bracket is provided at both ends in the width direction of the elastic band member, and the band member protrusion is located on the ground mountain side. It is formed in the belt member pressing plate part.

  According to such a configuration, even on the preceding tunnel side, water can be stopped by the belt member pressing plate portion on the natural mountain side, and water does not enter inside, so that the water stopping performance can be further improved. .

  According to the inter-tunnel seal structure of the present invention, sufficient water stopping performance can be obtained between the succeeding tunnel and the preceding tunnel.

It is sectional drawing which showed the seal structure between tunnels which concerns on 1st embodiment of this invention. It is a principal part enlarged view of the seal structure between tunnels concerning 2nd embodiment of this invention. It is sectional drawing which showed the large section tunnel. It is sectional drawing which showed the conventional seal structure.

  An inter-tunnel seal structure according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a state in which the subsequent tunnel is above the preceding tunnel.

  As shown in FIG. 3, the seal structure S between tunnels includes an inside (inner space portion) and an outside (natural mountain portion) of a large section tunnel 1 constructed by using a plurality of tunnels 10 arranged in parallel by a propulsion method. It is a structure that stops water between. The large-section tunnel 1 is constructed by using a plurality of (six in this embodiment) tunnels 10, 10,... Arranged side by side so as to substantially include all of the transverse sections. A plate 1A, a bottom plate 1B, and side walls 1C and 1C are provided. Each tunnel 10 is configured by a tunnel box connected in the axial direction.

  The inter-tunnel seal structure S includes a seal member 30, a seal fitting 40 for fixing the seal member 30 to the tunnel 10, an elastic band member 50 with which the tip of the seal member 30 abuts, and the elastic band member 50 being tunneled. 10 and a belt member mounting bracket 60 for fixing to 10. The seal member 30 and the seal mounting bracket 40 are accommodated in the seal accommodating portion 15, and the elastic band member 50 and the band member mounting bracket 60 are accommodated in the band member accommodating portion 20.

  As shown in FIG. 1, the seal member 30 is provided so as to close a gap between two adjacent tunnels 10 and 10. The seal member 30 is provided in a portion of the surface of one tunnel 10 (following tunnel 10a) that faces the other tunnel 10 (preceding tunnel 10b). An elastic band member 50 is fixed to the surface of the preceding tunnel 10b. The seal member 30 is disposed so as to face the elastic band member 50, and is accommodated in a step-like seal accommodation portion 15 formed at a predetermined depth on the outer peripheral surface of the subsequent tunnel 10a. The seal member 30 is made of, for example, an elastic material such as hard rubber or urethane having wear resistance. The seal member 30 is provided continuously along the propulsion direction (the direction perpendicular to the plane of FIG. 1). The seal member 30 includes a base portion 31 and a lip portion 32.

  The base portion 31 is a portion fixed to the trailing tunnel 10a and is formed in a long plate shape that is continuous along the propulsion direction. The base portion 31 is locked at both ends in the width direction by the seal mounting bracket 40. Specifically, the width direction end portion of the base portion 31 is fixed in a state of being pressed to the bottom surface side of the seal housing portion 15 by the seal pressing plate portion 46 of the seal mounting bracket 40. That is, the end in the width direction of the base portion 31 is sandwiched in a compressed state between the seal pressing plate portion 46 and the bottom surface of the seal housing portion 15.

  The lip portion 32 is formed integrally with the base portion 31. The lip portion 32 rises obliquely from the surface of the base portion 31 toward the preceding tunnel 10b, and the cross section of the base portion 31 and the lip portion 32 is substantially V-shaped (the lip portion 32 is downward in FIG. 1). Is arranged). The lip portion 32 is a portion that can be elastically tilted and deformed with respect to the base portion 31. The lip portion 32 extends toward the preceding tunnel 10b, and the outer surface of the preceding tunnel 10b is tilted from the initial state (the lip portion 32 is close to the base portion 31). To touch. At this time, the lip portion 32 is brought into close contact with the preceding tunnel 10b (the surface of the elastic band member 50) by a force for restoring the initial state.

  The seal member 30 is disposed so that the tip of the lip portion 32 faces the outside of the large-section tunnel 1 (see FIG. 3). That is, a groove having a substantially V-shaped cross section formed by the base portion 31 and the lip portion 32 is disposed so as to open toward the outside of the large cross-section tunnel 1. As a result, pressure (water pressure or earth pressure) from the outside of the large-section tunnel 1 acts on a groove portion having a substantially V-shaped section of the seal member 30. The surface of the lip portion 32 is pressed against the outer surface of the preceding tunnel 10b by the pressure outside the large-section tunnel 1 in accordance with the restoring force, and comes into close contact with the preceding tunnel 10b. This restoring force and the pressure outside the large-section tunnel 1 become the pressing force of the lip portion 32.

  The seal mounting brackets 40 are respectively provided at both ends in the width direction of the base portion 31. The seal mounting bracket 40 is made of metal. The seal mounting bracket 40 extends along the longitudinal direction of the seal member 30 (the direction perpendicular to the plane of FIG. 1), and is fixed to the bottom surface of the seal housing portion 15 by a fixing means such as a bolt B. The seal mounting bracket 40 includes a tightened portion 41 and a seal pressing plate portion 46. The tightened portion 41 is a portion to be tightened by the bolt B and is installed on the bottom surface of the seal housing portion 15. A bolt through hole 43 into which the bolt B is inserted is formed in the tightened portion 41. The bolt through holes 43 are formed at a predetermined pitch along the propulsion direction. On the other hand, a bolt through hole 16 is also formed in the bottom plate 15 a of the seal housing portion 15. A female screw member 17 is fixed by welding to the back surface of the bottom plate 15a. The bolt through hole 16 and the female screw member 17 are arranged concentrically. The bolt B is inserted into the bolt through hole 43 and the bolt through hole 16, and the tip portion thereof is screwed into the female screw member 17 on the back surface of the bottom plate 15 a. With this bolt B, the tightened portion 41 is fixed to the bottom surface of the seal housing portion 15.

  A plate material 47 is fixed to the surface of the tightened portion 41 by welding. The plate material 47 extends along the propulsion direction, and one end in the width direction protrudes toward the seal member 30 side. This protruding portion constitutes the seal pressing plate portion 46. A through hole 48 is formed in the plate material 47. The through hole 48 is arranged concentrically with the bolt through hole 43 of the tightened portion 41. The through hole 48 has a larger diameter than the bolt through hole 43. The head of the bolt B is accommodated in the through hole 48. The surface of the seal pressing plate portion 46 adjacent to the base end of the lip portion 32 is substantially flush with the outer surface of the trailing tunnel 10a (the opening end of the seal housing portion 15) (in this embodiment, slightly inside the surface). It has become). The seal pressing plate portion 46 located on the front end side of the lip portion 32 has a surface deeper than the outer surface of the trailing tunnel 10 a, and is closer to the opening end of the seal housing portion 15 than the seal pressing plate portion 46. A space is provided. Thereby, even if the outer surface of the preceding tunnel 10b and the succeeding tunnel 10a come into contact with each other, the pressure (water pressure or earth pressure) from the outside of the large section tunnel 1 is applied to the groove portion having a substantially V-shaped section of the seal member 30. It is possible to continue to act.

  Of the pair of seal mounting brackets 40, 40, a protrusion 49 is formed on a surface 46a of the seal pressing plate portion 46 of the seal mounting bracket 40 located on the natural ground side, which faces the seal member 30. The protrusion 49 protrudes toward the bottom surface side of the seal housing portion 15. The protrusion 49 is formed along the extending direction of the seal member 30. The protrusion 49 is formed at a position intermediate from the tip of the projecting dimension of the seal pressing plate portion 46. The protrusion 49 has a semicircular cross section. The shape of the protrusion 49 is not limited to a semicircular cross section, and may be another shape (for example, a V shape with a sharp tip) depending on the rubber shape and hardness of the seal member 30. . The protrusions 49 are formed by fixing a bar-shaped member having a semicircular cross section to the surface of the plate material 47 by welding or an adhesive. When the base portion 31 is pressed by the seal pressing plate portion 46, the protruding ends of the protrusions 49 are slightly recessed into the surface of the base portion 31, and the contact pressure increases. Thereby, the water stop performance of the seal mounting bracket 40 and the base portion 31 is improved.

  Of the pair of seal mounting brackets 40, 40, the seal pressing plate portion 46 of the seal mounting bracket 40 positioned on the inner side (opposite to the natural ground side) presses the seal member 30 across the entire surface facing the seal member 30. Yes.

  The seal accommodating portion 15 is formed on the surface of the succeeding tunnel 10a including a plurality of propulsion boxes located behind the excavator (not shown). The seal accommodating portion 15 is formed in a portion of the surface of the subsequent tunnel 10a that faces the preceding tunnel 10b, and extends along the propulsion direction. In this embodiment, the seal accommodating part 15 is formed in the corner | angular part of the outer side end (end of the outer direction of the large cross section tunnel 1) of the surface facing the preceding tunnel 10b. The seal accommodating portion 15 has a step shape that is lowered by a predetermined depth (the outer end is open). The seal accommodating portion 15 is partitioned by a side plate 15b and a bottom plate 15a which are welded and fixed inside an opening portion (the outer end is open) formed in the skin plate 11 on the outer end of the surface of the tunnel 10. Yes. The seal accommodating part 15 has a width dimension larger than the width dimension of the seal member 30 so that the seal member 30 can be installed. The seal accommodating portion 15 has a depth dimension that is larger than the thickness dimension of the base portion 31 and smaller than the entire thickness dimension of the seal member 30, and the lip portion when the seal member 30 is installed in the seal accommodating portion 15. A part of the distal end side of 32 (the opposite side of the base end side connected to the base portion 31) projects from the upper opening of the seal housing portion 15.

  In addition, although the sealing member 30 is formed in the cross-sectional substantially V shape, it is not the meaning which limits the structure of the sealing member 30. FIG. For example, other shapes such as a U-shaped section, an L-shape, and a T-shape may be used. Moreover, the structure of the sealing member 30 is not limited to this embodiment, For example, the thing of the structure filled with the fluid inside a bag body and pressed by a preceding tunnel may be sufficient.

  The elastic band member 50 is a member with which the tip of the lip portion 32 abuts. Similar to the seal member 30, the elastic band member 50 is made of, for example, a material such as hard rubber or urethane having wear resistance. The elastic band member 50 is softer than the seal member 30. The elastic band member 50 is disposed in parallel to the seal member 30 so as to face the seal member 30, and is accommodated in the band member accommodating portion 20 formed on the outer peripheral surface of the preceding tunnel 10b. The elastic band member 50 has a convex cross-sectional shape with a central portion in the width direction protruding. The lip portion 32 of the seal member 30 comes into contact with and slides on the top end surface of the elastic band member 50 (the surface exposed on the surface of the preceding tunnel 10b). The distal end surface of the elastic band member 50 is flat and is substantially flush with the outer surface of the preceding tunnel 10b (the opening end of the band member accommodating portion 20). Of the step portions 50a and 50b on both sides in the width direction of the elastic band member 50, the step portion 50a (left side in FIG. 1) located on the outer side (the ground mountain side) of the large section tunnel is located on the inner side of the large section tunnel. The step from the front end surface is larger than the stepped portion 50b (right side in FIG. 1). The step portions 50a and 50b on both sides in the width direction of the elastic band member 50 may be the same step.

  The elastic band member 50 is locked at both ends in the width direction by the band member mounting bracket 60. Specifically, the end portion in the width direction of the elastic band member 50 is fixed in a state of being pressed to the bottom surface side of the band member accommodating portion 20 by the band member pressing plate portion 66 of the band member mounting bracket 60. In other words, the widthwise end portion of the elastic band member 50 (the portion where the stepped portions 50a and 50b are thinned) is sandwiched between the band member pressing plate portion 66 and the bottom surface of the band member accommodating portion 20 in a compressed state. Has been.

  The band member mounting bracket 60 is provided at both ends in the width direction of the elastic band member 50. The band member mounting bracket 60 is made of metal. The band member mounting bracket 60 extends along the longitudinal direction of the elastic band member 50 (perpendicular to the plane of FIG. 1), and is fixed to the bottom surface of the band member accommodating portion 20 by a fixing means such as a bolt B. Yes. The band member mounting bracket 60 includes a tightened portion 61 and a band member pressing plate portion 66. The tightened portion 61 is a portion to be tightened by the bolt B and is installed on the bottom surface of the band member accommodating portion 20. A bolt through hole 63 through which the bolt B is inserted is formed in the tightened portion 61. The bolt through holes 63 are formed at a predetermined pitch along the propulsion direction. On the other hand, a bolt through hole 21 is also formed in the bottom plate 20 a of the band member accommodating portion 20. A female screw member 22 is fixed by welding to the back surface of the bottom plate 20a. The bolt through hole 21 and the female screw member 22 are arranged concentrically. The bolt B is inserted into the bolt through hole 63 and the bolt through hole 21, and the tip portion thereof is screwed into the female screw member 22. With this bolt B, the tightened portion 61 is fixed to the bottom surface of the band member accommodating portion 20.

  A plate material 67 is fixed to the surface of the tightened portion 61 by welding. The plate material 67 extends along the propulsion direction, and one end portion in the width direction projects to the elastic band member 50 side. This protruding portion constitutes the belt member pressing plate portion 66. A through hole 68 is formed in the plate material 67. The through hole 68 is arranged concentrically with the bolt through hole 63 of the tightened portion 61. The through hole 68 has a larger diameter than the bolt through hole 63. The head of the bolt B is accommodated in the through hole 68. The band member pressing plate portion 66 located on the inner side (the right side in FIG. 1) of the large-section tunnel 1 has a surface substantially flush with the outer surface of the preceding tunnel 10b (the upper opening end of the band member accommodating portion 20). In this embodiment, it is slightly inside the surface). The band member pressing plate portion 66 located on the outer side (the left side in FIG. 1) of the large-section tunnel 1 has a surface deeper than the outer surface of the preceding tunnel 10b.

  Of the pair of band member mounting brackets 60, the band member protrusions 69 (hereinafter simply referred to as the band member protrusions 69) are provided on the surface 66 a of the band member pressing plate 66 of the band member mounting bracket 60 located on the natural ground side. (Referred to as “projection 69”). The protrusion 69 protrudes toward the bottom surface side of the band member accommodating portion 20. The protrusion 69 is formed along the extending direction of the seal member 30. The protrusion 69 is formed at a position intermediate from the tip of the overhang dimension of the belt member pressing plate portion 66. The protrusion 69 has a semicircular cross section. When the elastic band member 50 is pressed by the band member pressing plate portion 66, the protruding ends of the protrusions 69 slightly sink into the surface of the elastic band member 50, and the contact pressure increases. Thereby, the water stop performance between the band member mounting bracket 60 and the elastic band member 50 is improved. Of the pair of band member mounting brackets 60, 60, the band member pressing plate portion 66 of the band member mounting bracket 60 located on the inner side (opposite to the natural ground side) is an elastic band member over the entire surface facing the elastic band member 50. 50 is pressed.

  The band member accommodating portion 20 is formed on the surface of the preceding tunnel 10b. The band member accommodating portion 20 is formed in a portion of the surface of the preceding tunnel 10b facing the construction position of the succeeding tunnel 10a, and extends along the propulsion direction. In this embodiment, the band member accommodating part 20 is formed in the corner | angular part of the outer side edge (end of the outer direction of the large cross section tunnel 1) of the surface facing the construction position of the succeeding tunnel 10a. The band member accommodating portion 20 has a step shape that is lowered by a predetermined depth (the outer end is open). The band member accommodating portion 20 is partitioned by a side plate 20b and a bottom plate 20a which are welded and fixed inside an opening portion (the outer end is open) formed in the skin plate 11 at the outer end of the surface of the tunnel 10. ing. The band member accommodating portion 20 has a depth dimension equivalent to the thickness dimension of the elastic band member 50.

  According to the inter-tunnel seal structure S configured as described above, the seal member 30 can be pressed with a small contact area by providing the protrusion 49 on the seal pressing plate portion 46 of the seal mounting bracket 40. Accordingly, the tightening force of the bolt B can be concentrated on the protrusion 49, and the protrusion 49 presses the seal member 30 with a high surface pressure. As a result, the contact pressure of the seal pressing plate portion 46 with respect to the seal member 30 is increased, and there is a water channel where water enters between the seal mounting bracket 40 and the seal member 30 on the water of the protrusion 49. However, the water channel can be blocked by the protrusion 49. As a result, water can be prevented from entering the interior of the ridge 49, and sufficient water stopping performance can be obtained.

  Further, since the protrusion 49 is provided on the metal seal mounting bracket 40, the dimensional accuracy is higher than the case where the protrusion is provided on a soft member such as a seal member. High water stopping performance can be secured.

  Furthermore, in this embodiment, since the protrusion 49 is formed in the part close | similar to the fastening position of the volt | bolt B, it is easy to transmit a clamping force without escaping, and a water stop performance improves further.

  Moreover, the protrusion 49 which interrupts | blocks a water path was formed in the seal press board part 46 in the part close | similar to the earth and sand of a natural mountain, and can shorten the water path which generate | occur | produces on water. Accordingly, a region where water enters between the seal member 30 and the seal mounting bracket 40 can be reduced, and water does not enter inside the seal member 30 and the water stop performance is further improved.

  Furthermore, the seal member 30 has a force to try to break through the gap between the outer seal pressing plate portion 46 and the bottom surface of the seal housing portion 15 due to the pressure (water pressure or earth pressure) from the outside of the large-section tunnel 1. Although it acts, since the base part 31 is pressed by the protrusion 49 being recessed into the seal member 30 and serving as a displacement prevention, the seal member 30 can be reliably fixed without coming out of the gap. At the same time, the formation of a gap between the seal member 30 and the seal mounting bracket 40 can be suppressed.

  In the present embodiment, the ridge 69 is also provided on the band member pressing plate portion 66 of the band member mounting bracket 60 that fixes the elastic band member 50, and the band member mounting bracket 60 for the elastic band member 50 is the sealing member 30. Therefore, the elastic band member 50 can obtain the same effects as those described above. As a result, the water stopping performance is improved in both the succeeding tunnel 10a and the preceding tunnel 10b, and water can be prevented from entering the inside of the large section tunnel 1.

  Next, the tunnel sealing structure according to the second embodiment of the present invention will be described with reference to FIG. In the inter-tunnel seal structure according to the second embodiment, as shown in FIG. 2, a water-expandable water stop material 70 is provided in a gap formed around the protrusion 49 between the seal pressing plate portion 46 and the seal member 30. Provided. The water-swellable water-stopping material 70 is provided in a gap (on the left side of the ridge 49 in FIG. 2) that is below the ridge 49. The water-expandable water blocking material 70 is filled in the gap so as to have a height equivalent to the protruding height of the protrusion 49. Since the water-swellable water-stopping material 70 is provided below the ridges 49, the water-swellable water-stopping material 70 does not normally come into contact with water. The water-swellable water-stopping material 70 is provided as a secondary seal for ensuring sealing performance when water intrudes beyond the protrusion 49. That is, when water infiltrates to the water-expandable water stop material 70, the water expandable water stop material 70 expands and presses the seal member 30, so that the water is blocked at that portion, and the water stop performance. Can be secured. In addition, since the structure of another part is the same as that of 1st embodiment, it attaches | subjects the same code | symbol and abbreviate | omits description.

  In the present embodiment, the water-swellable water-stopping material 70 is provided under the ridge 49, but a water-swellable water-stopping material may be provided on the water. In this case, since water comes into contact with the water-swellable water-stopping material, a double seal structure of the water-swellable water-stopping material and the ridges can be obtained. In this case, it is necessary to fill the water-expandable water stop material in an expanded state so as not to be higher than the protrusion height of the protrusion. By doing in this way, a protrusion can sink into a sealing member and can ensure water stop performance.

  The water-swellable water-stopping material 70 as described above is not limited to being provided between the seal pressing plate portion 46 and the seal member 30, but the band member pressing plate portion of the elastic band member 50 and the band member mounting bracket 60. 66 may be provided.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably. For example, in the above-described embodiment, the number of the protrusions 49 and 69 is one, but is not limited to this, and may be two or more. Moreover, the cross-sectional shape of the protrusions 49 and 69 is not limited to a semicircular shape, and may be another shape. The cross-sectional shape of the protrusions 49 and 69 is preferably a shape with a tapered tip, such as a triangular (wedge-shaped) shape or a polygonal shape, but has a rectangular cross-section with the same width toward the tip side. Also good.

  Furthermore, in the said embodiment, although the protrusions 49 and 69 are fixing and forming a rod-shaped member to a board | plate material, it is not limited to this, Even if it forms a protrusion by taper-processing a board | plate material. Alternatively, it may be formed as a plate material having a shape with protrusions from the beginning.

  In the embodiment, the elastic band member 50 is provided at a position facing the seal member 30, but the seal member 30 is brought into contact with the surface of the skin plate 11 of the preceding tunnel 10b without providing the elastic band member 50. Even if it makes it do, between the sealing member 30 and the seal press board part 46, the effect that a water stop performance can be improved can be acquired.

S Tunnel-to-tunnel seal structure 10a Trailing tunnel 10b Preceding tunnel 15 Seal housing portion 20 Band member housing portion 30 Seal member 31 Base portion 32 Lip portion 40 Seal mounting bracket 46 Seal pressing plate portion 49 Projection 50 Elastic belt member 60 Band member mounting Metal fitting 66 Band member pressing plate 69 Band member protrusion 70 Water-expandable water stop material

Claims (4)

In the inter-tunnel seal structure provided between the preceding tunnel and the succeeding tunnel constructed next to it,
A seal member provided on the surface of the succeeding tunnel, a plurality of seal fittings for fixing the seal member to the succeeding tunnel, an elastic band member provided on the surface of the preceding tunnel, and the elasticity A plurality of band member mounting brackets for fixing the band member to the preceding tunnel,
The seal member extends along the propulsion direction of the trailing tunnel, protrudes toward the preceding tunnel side, and a tip portion thereof abuts on the preceding tunnel,
The seal mounting bracket has a seal pressing plate portion that presses the sealing member toward the subsequent tunnel side,
On the surface facing the seal member of the seal pressing plate portion of at least one of the plurality of seal mounting brackets, a protrusion is formed along the extending direction of the seal member,
The elastic band member is in contact with the tip of the seal member,
The band member mounting bracket has a band member pressing plate portion that presses the elastic band member toward the preceding tunnel side,
The surface of the band member pressing plate of at least one band member mounting bracket among the plurality of band member mounting brackets facing the elastic band member is provided for the band member along the extending direction of the elastic band member. A tunnel-to-tunnel seal structure characterized in that protrusions are formed. The seal member includes a base portion fixed to the following tunnel, and a lip portion that rises obliquely from the base portion toward the preceding tunnel,
The seal mounting brackets are provided at both ends in the width direction of the base portion,
The inter-tunnel seal structure according to claim 1, wherein the protrusion is formed on the seal pressing plate portion of the seal mounting bracket located on a natural ground side. The inter-tunnel seal structure according to claim 1 or 2, wherein a water-expandable water stop material is provided in a gap between the seal pressing plate portion formed around the protrusion and the seal member. . The band member mounting bracket is provided at both ends in the width direction of the elastic band member,
The said strip member protrusion is formed in the said strip member press board part of the said strip member attachment metal fitting located in the natural ground side. The Claim 1 thru | or 3 characterized by the above-mentioned. Seal structure between tunnels.

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