JP4557941B2 - Tunnel lining concrete placement method and placement structure - Google Patents

Description

  The present invention relates to a tunnel lining concrete placing method for forming lining concrete using a tunnel lining formwork, and a tunnel lining concrete placing structure used for the lining concrete placing method.

  For example, in tunnel construction methods such as the mountain tunnel construction method, a tunnel lining formwork (concrete lining mold is used as a method for forming tunnel lining concrete that is constructed to cover the natural ground on the inner peripheral surface of the excavated tunnel. A method using a frame is generally employed. As shown in FIGS. 7 (a) and 7 (b), the tunnel lining formwork 50 is formed on the side wall of the tunnel 53 along the inner peripheral surface 54 of the tunnel 53 having an arch-shaped portion 52 such as a horseshoe shape. In the space 61 between the installed tunnel lining form 50 and the natural ground covered with the sprayed concrete 56 on the inner peripheral surface 54 of the tunnel 53 The lining concrete is formed so as to be continuous with the concrete of the inverted portion 51 at the bottom of the tunnel, preferably by placing and hardening unreinforced concrete.

  Moreover, as the tunnel lining formwork 50, for example, in addition to the assembly type tunnel lining formwork called paracentle, a mobile tunnel lining formwork called slide centle is known. With the progress of the excavation work, the tunnel lining formwork 50 is moved from the rear to the front in the digging direction of the tunnel 53 while the tunnel lining formwork 50 is reinstalled every predetermined span of about 10 m, for example. Then, the side and upper lining concrete of the tunnel 53 is sequentially cast and formed.

  And in order to lay the lining concrete of the side part and the upper part of the tunnel using the tunnel lining formwork 50, for example, as shown in FIGS. For example, an area from the side wall portion 55 of the tunnel 53 to the shoulder portion of the arch-shaped portion 52 is provided through the inspection window 56 as a height region where concrete can be placed from the inspection window 56 provided in the mold 50. The concrete 57 is supplied and the vibrator 58 is inserted from the inspection window 56, and the concrete 57 is placed while the supplied concrete 57 is compacted. After that, as a height region that is difficult to be compacted by the vibrator 58 while supplying the concrete 57 from the inspection window 56, a tunnel portion (crown portion) 59 (see FIG. 7) region of the tunnel 53 is not used. A pattern is used in which concrete is driven in by a blow-up method from a concrete casting hole 60 as a blow-up opening provided at the top end of the lining mold 50 and the concrete 57 of the crown 59 is formed without compaction. ing.

  More specifically, after the tunnel lining formwork 50 is installed at a predetermined position, for example, the concrete 57 is poured from the lower portion of the side wall portion 55 through the lower inspection window 56 and compacted using the vibrator 58. (Refer to FIG. 8A) and a step of compacting using the vibrator 58 while pouring the concrete 57 through the middle inspection window 56 toward the arch-shaped portion 52 on the upper side of the side wall 55 (FIG. 8 ( b)), and further to the front of the crown 59 of the arch-shaped portion 52, the concrete 57 is poured through the upper inspection window 56 and, if necessary, the concrete placement hole 60, and then compacted using the vibrator 58. Step (see FIG. 8 (c)) and the concrete from the existing lining concrete 62 side portion of the crown 59 through the concrete placement hole 60 in order. Pouring 7, by the step of filling the concrete up wife formwork 63 without compaction (see FIG. 8 (d)), so that the lining concrete is pouring.

  With the conventional method for placing lining concrete using the tunnel lining formwork 50 as described above, the concrete 57 placed on the tunnel crown (crown) 59 cannot be compacted. The reliability of the lining concrete at the crown portion 59 is lowered, and in the vicinity of the existing lining concrete 62, air accumulation and cavities are likely to occur. Further, since the concrete 57 is placed in the space 61 between the tunnel lining formwork 50 and the natural ground in a concentrated manner from the concrete placing hole 60 as a blow-up opening, the concrete 57 is removed from the concrete placing hole 60. The trajectory when flowing to the surroundings tends to remain on the surface of the lining concrete as a striped pattern, resulting in poor finish.

On the other hand, a technique is disclosed that enables the concrete placed in the tunnel crown to be compacted (see, for example, Patent Document 1). In the lining concrete placement method of Patent Document 1, when a tunnel is constructed by a shield method different from the mountain tunnel method, the crown portion of the gap between the segment and the centle extends over substantially the entire length in the tunnel axis direction. An extending guide rail with an L-shaped angle suspended in a concave direction and a rod-shaped vibrator that moves along the guide rail are installed, and concrete is placed in the gap in the crown portion from the existing side with a rod-shaped vibrator. It was cast while compacted, and the rod-shaped vibrator was moved along the guide rail from the existing side toward the end plate side as the concrete was filled. Moreover, in the lining concrete placement method of patent document 1, a guide rail is provided also as a setup line of secondary lining concrete, for example.
JP 2002-30893 A

  However, in the method of placing concrete on the crown portion of the tunnel described in Patent Document 1, a guide rail having an L-shaped angle that guides the rod-like vibrator in the tunnel axial direction is used in the axial direction of the tunnel at the concrete placement location. In a mountain tunnel or the like by a tunnel lining formwork in which lining concrete is preferably formed using unreinforced concrete without installing a setup bar or the like. Will cause a lot of waste in its materials and construction.

  The present invention has been made paying attention to such a conventional problem, and is formed using a tunnel lining formwork with a simple configuration without causing much waste in materials and construction. An object of the present invention is to provide a tunnel lining concrete placement method and a tunnel lining concrete placement structure capable of efficiently and effectively compacting the lining concrete of the tunnel crown.

  The present invention relates to a tunnel lining concrete placing method for forming lining concrete using a tunnel lining formwork, and the tunnel lining mold between the already formed existing lining concrete and the end formwork. A plurality of guide pieces having pipe insertion holes arranged in series in the axial direction of the tunnel on the outer peripheral surface of the frame and projecting, and a guide pipe having a smaller diameter than the pipe insertion hole, Connected to the rear end portion of the rod-shaped vibrator having a smaller diameter than the insertion hole in a state where the subsequent vibrator cable is inserted, and the rod-shaped vibrator and the guide pipe are inserted into the pipe insertion hole and supported by the guide piece. While the bar-shaped vibrator is disposed close to the existing lining concrete, the vibrator cable is extended to the end form side to form the end form frame. The outer surface of the tunnel lining formwork and the inner periphery of the tunnel are covered by being penetrated between the end surface of the existing lining concrete and the end formwork. Concrete is cast from the existing lining concrete side into the lining space between the construction surface, and the rod-like vibrator and the guide pipe embedded in the placed concrete are inserted into the pipe insertion hole of the guide piece. The above object is achieved by providing a tunnel lining concrete placing method in which the concrete is compacted while being moved linearly toward the end form frame by pulling with the vibrator cable, using as a guide.

  Further, in the tunnel lining concrete placing method of the present invention, the guide pipe is rotatably connected to the rod-like vibrator, and the guide pipe embedded in the concrete placed in the lining space, It is preferable to move it linearly toward the end form frame while rotating.

  Furthermore, in the tunnel lining concrete placing method of the present invention, it is preferable that the lining space is a lining space of a tunnel crown.

  And this invention is the tunnel lining concrete placement structure used for the said tunnel lining concrete placement method, Comprising: The tunnel lining formwork between the existing lining concrete already formed and the end formwork A plurality of guide pieces having pipe insertion holes, which are arranged in series on the outer peripheral surface at intervals in the axial direction of the tunnel, and a rear end portion of a rod-shaped vibrator having a smaller diameter than the pipe insertion hole. A guide pipe having a diameter smaller than that of the pipe insertion hole, which is connected in a state in which a subsequent vibrator cable is inserted, and the rod-shaped vibrator and the guide pipe are connected to an end surface of the existing lining concrete and the end face mold. In the wrapping space between the outer peripheral surface of the tunnel lining formwork and the lining surface of the inner periphery of the tunnel, the rod-shaped vibrator is inserted into the existing lining The guide pipe is inserted into the pipe insertion hole and supported by at least two guide pieces, and the vibrator cable is extended to the end form frame side in the state of being arranged toward the cleat. The above object is achieved by providing a tunnel lining concrete placement structure that is attached in a state where it can be pulled from the outside of the end frame by penetrating the frame.

  Further, in the tunnel lining concrete placing structure of the present invention, a plurality of the guide pieces are provided in series with a fixed installation interval in the axial direction of the tunnel, and the guide pipe is larger than twice the installation interval. It preferably has a length.

  Furthermore, in the tunnel lining concrete placing structure of the present invention, it is preferable that the guide pipe is rotatably connected to the rod-like vibrator.

  Furthermore, in the tunnel lining concrete placing structure of the present invention, it is preferable that a spiral protrusion is provided on the outer peripheral surface of the guide pipe.

  Moreover, it is preferable that the tunnel lining concrete placement structure of this invention is provided with the rotary blade inclined with respect to the tunnel axial direction on the outer peripheral surface of the guide pipe.

  According to the tunnel lining concrete placing method or the tunnel lining concrete placing structure of the present invention, it is formed using a tunnel lining formwork with a simple configuration without causing much waste in materials and construction. In particular, the lining concrete of the tunnel crown can be compacted efficiently and effectively.

  As shown in FIGS. 1A to 1C, a tunnel lining concrete placing method according to a preferred embodiment of the present invention is for tunnel lining as a concrete lining formwork, for example, in a mountain tunnel construction method. When forming the lining concrete 11 on the side and the upper part of the tunnel 12 using the mold 10, in particular, the lining concrete 11a of the crown (crown) 13 of the tunnel 12 is placed below this. For example, it is employed as a method for placing the lining concrete 11 on the side wall portion and the arch-shaped portion of the tunnel 12 and then placing it while sufficiently compacting.

  Here, in this embodiment, the tunnel lining form 10 is, for example, a slide-movable centle known as the prior art, and a predetermined span of, for example, about 10 m as the tunnel 12 excavates. It is possible to sequentially cast and form the lining concrete 11 on the side portion and the upper portion of the tunnel 12 while re-installing the tunnel 12 from the rear to the front in the digging direction X. Moreover, in this embodiment, the lining concrete 11 of a side wall part and an arch-shaped part is concrete through the inspection window 14 provided in the installed tunnel lining formwork 10 by the method similar to the conventional construction method, for example. Is supplied, and a rod-like vibrator 14a as a vibration compaction device is inserted from the inspection window 14 to compact the supplied concrete, whereby the side wall portion and the arched portion of the lining concrete 11 are tunnel crown portions. It will be placed prior to the 13 lining concrete 11a.

  And the tunnel lining concrete placement method of this embodiment is already formed as shown in FIGS. 1-4 in the concrete placement method which forms the lining concrete 11a using the tunnel lining formwork 10. FIG. A guide piece 18 having a pipe insertion hole 17 is provided at an interval in the axial direction X of the tunnel 12 on the outer peripheral surface of the tunnel lining formwork 10 between the existing lining concrete 15 and the end formwork 16. The guide pipe 19 having a smaller diameter than the pipe insertion hole 17 is inserted into the rear end portion of the rod-shaped vibrator 20 having a smaller diameter than the pipe insertion hole 17, and the subsequent vibrator cable 21 is inserted. The rod-shaped vibrator 20 is installed while the rod-shaped vibrator 20 and the guide pipe 19 are inserted into the pipe insertion hole 17 and supported by the guide piece 18. While juxtaposed with engineering concrete 15, a state can be towed from the outside of the wife formwork 16 by the vibrator cable 21 by extending his wife mold 16 side pass through the wife formwork 16. After that, the existing lining concrete 15 is sandwiched between the end face 15a and the end form frame 16 in the lining space 23 between the outer peripheral surface of the tunnel lining form 10 and the inner lining surface 22 of the tunnel. Concrete is cast from the lining concrete 15 side through the concrete placing hole 24, and the rod-like vibrator 20 and the guide pipe 19 embedded in the placed concrete are guided through the pipe insertion hole 17 of the guide piece 18. Then, the concrete placed is compacted while being moved linearly toward the end form 16 by pulling by the vibrator cable 21.

  Moreover, according to this embodiment, as a means for implementing the above-mentioned tunnel lining concrete placing method, as shown in FIGS. A plurality of guide pieces 18 having pipe insertion holes 17 projecting from the outer circumferential surface of the tunnel lining form 10 between the two and projecting in series in the axial direction X of the tunnel 12. A tunnel covering comprising a guide pipe 19 having a diameter smaller than that of the pipe insertion hole 17 connected to a rear end portion of the rod-shaped vibrator 20 having a diameter smaller than that of the pipe insertion hole 17 in a state where the following vibrator cable 21 is inserted. An engineered concrete placement structure is used. In this tunnel lining concrete placement structure, the rod-like vibrator 20 and the guide pipe 19 are sandwiched between the end face 15a of the existing lining concrete 15 and the end form frame 16, and the outer surface of the tunnel lining form 10 and the tunnel interior. In the lining space 23 between the peripheral lining surface 22 and the rod-shaped vibrator 20 being arranged toward the existing lining concrete 15, the guide pipe 19 is inserted into the pipe insertion hole 17 and at least two guide pieces. 18 and is attached in a state where it can be pulled from the outside of the wife form 16 by extending the vibrator cable 21 to the end form 16 and penetrating the end form 16.

  The guide piece 18 projecting from the outer peripheral surface of the tunnel lining mold 10 is made of, for example, a rectangular steel plate. For example, as shown in FIGS. The frame 10 is penetrated, and is integrally joined to the tunnel lining form 10 and attached. The portion of the guide piece 18 that protrudes to the outside of the tunnel lining mold 10 is disposed at the center portion of the guide piece 18, and the rod-like vibrator 20 and the guide pipe 19 having the same diameter as that of the guide pipe 19 have an outer diameter of, for example, 65 mm. A circular pipe insertion hole 17 having a slightly larger inner diameter of, for example, 80 mm is formed therethrough. The pipe insertion hole 17 has an inner peripheral surface 17a facing the existing lining concrete 15 side of the guide piece 18, that is, a surface facing the moving direction X ′ of the rod-like vibrator 20 and the guide pipe 19 by pulling the vibrator cable 21. Therefore, it has a tapered shape in which the inner diameter is obliquely reduced toward the opposite surface. Since the pipe insertion hole 17 has such a tapered shape, the guide pipe 19 is moved to the end frame 16 side, and the guide is inserted into the pipe insertion hole 17 of the next guide piece 18 on the end frame 16 side. When the pipe 19 is inserted and supported, it is possible to prevent the guide pipe 19 from being caught around the pipe insertion hole 17 and difficult to be inserted.

  Moreover, in this embodiment, the guide piece 18 is provided with two or more in series with the space | interval of 1000 mm as the fixed installation space | interval a in the axial direction X of a tunnel, for example.

  The rod-shaped vibrator 20 is a known device that is widely used as a compacting device for concrete, and includes, for example, an electromagnetic vibrating body, a vibrating body that vibrates due to the rotational force of a motor, and the rear end of the rod-shaped vibrator 20. The vibrator cable 21 is composed of a flexible power supply hose that is connected to the portion and accommodates a connection line or the like.

  The guide pipe 19 connected to the rear end portion of the rod-shaped vibrator 20 is made of, for example, a steel hollow pipe, and has a length of, for example, 2100 to 2500 mm, which is longer than twice the installation interval a of the guide pieces 18. Have. Since the guide pipe 19 has a length larger than twice the installation interval a of the guide pieces 18, the guide pipe 19 is moved to the end form frame 16 side by pulling the vibrator cable 21. Since 19 always holds the state of being inserted and supported in the pipe insertion holes 17 of at least two guide pieces 18, the directionality and straightness can be easily maintained. Further, when the guide pipe 19 is inserted into the pipe insertion hole 17 of the next guide piece 18 adjacent to the movement direction X ′ of the guide piece 18 through which the guide pipe 19 is inserted, Since the guide pipe 19 is supported and the directivity and straightness of the guide pipe 19 are maintained, the guide pipe 19 is smoothly inserted into the next pipe insertion hole 17.

  Moreover, in this embodiment, it is preferable that the guide pipe 19 is rotatably connected to the rod-like vibrator 20, while rotating the guide pipe 19 embedded in the concrete placed in the lining space 23. It is preferable to move linearly toward the end form 16 side. As the guide pipe 19 moves while rotating in the concrete, the directionality and straightness during movement are stably maintained by the peripheral surface friction with the flowing concrete.

  Further, in the present embodiment, as shown in FIGS. 6A and 6B, a spiral protrusion 25 is provided on the outer peripheral surface of the guide pipe 19, or the rotating blade is inclined with respect to the tunnel axial direction X. 26 is preferably provided. These spiral protrusions 25 and rotary blades 26 receive resistance from the concrete when moving in the concrete, and a rotational force is applied to the guide pipe 19. The pipe 19 rotates and the directionality and straightness during movement are more stably maintained.

  In this embodiment, the tunnel lining composed of a plurality of guide pieces 18 and guide pipes 19 after casting and forming the lining concrete 11 on the side wall portion and the arch-shaped portion of the tunnel 12 shown in FIG. For example, as shown in FIG. 1C, the concrete pump is connected to the concrete placement hole 24 with respect to the lining space 23 of the crown portion (crown portion) 13 of the tunnel 12 in which the concrete placement structure is installed. Concrete is cast from the concrete placing hole 24. After placing concrete until the entire lining space 23 is filled, or after placing concrete until at least the rod-like vibrator 20 and the guide pipe 19 are embedded in the concrete, the concrete placing hole 24 and others For example, by pulling the vibrator cable 21 with the pulling force of the cord winding device 27, for example, by pulling the vibrator cable 21 and the guide pipe 19 while shaking the rod-like vibrator 20 while adding concrete from the casting opening of the cable. Move to the frame 16 side. When the guide pipe 19 moves to the end form 16, for example, the guide pipe 19 and the rod-shaped vibrator 20 are pulled out from the cable through hole of the end form 16, and the lining concrete in the span where the tunnel lining form 10 is installed. No. 11 placement work is completed.

  And according to this embodiment, the covering concrete of the crown portion 13 of the tunnel 12 is formed by using the tunnel covering formwork 10 with a simple configuration without causing much waste in materials and construction. 11a can be efficiently and effectively compacted. That is, in this embodiment, a plurality of guide pieces 18 having pipe insertion holes 17 are arranged in series on the outer peripheral surface of the tunnel lining form 10, and the guide pipe 19 connected to the rear end portion of the rod-like vibrator 20 is connected to the pipe. The rod-like vibrator 20 and the guide pipe 19 embedded in the cast concrete are inserted into the insertion hole 17 and supported by the guide piece 18, and the vibrator cable 21 is used with the pipe insertion hole 17 of the guide piece 18 as a guide. Since concrete is compacted while being moved toward the end form 16 by towing, a guide rail comprising an L-shaped angle or the like for guiding the rod-like vibrator is provided in advance over substantially the entire span of the tunnel lining formwork. Compared to the installation method, the simple method is efficient without causing much waste in materials and construction. The factory concrete 11a it is possible to Yuku be compacted.

  Further, according to the present embodiment, the rod-shaped vibrator 20 and the guide pipe 19 are supported by the plurality of guide pieces 18 and move linearly toward the end form frame 16 with the central portion of the wall thickness of the lining concrete 11a. Since the concrete is compacted, the lining concrete 11a can be compacted efficiently and effectively, and thereby, the lining is performed with sufficient compaction, good quality and good surface finish. It becomes possible to obtain the concrete 11a.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the present invention can be employed to form lining concrete in other tunnels other than mountain tunnels. In addition, the inner peripheral surface of the tunnel that forms a lining space between the outer surface of the tunnel lining formwork is the inner periphery of the tunnel after the primary lining is performed in addition to the ground covered with sprayed concrete. It may be a lining surface for performing secondary lining by a surface. Furthermore, the lining concrete compacted according to the present invention does not necessarily have to be the lining concrete of the tunnel crown. For example, a plurality of guide pieces are placed on the side walls, shoulders, and arch-shaped portions of the tunnel in the axial direction of the tunnel. The present invention can also be applied by arranging them in series.

(A)-(c) is a side view showing a part of the work procedure of laying concrete placing work including a tunnel lining concrete placing method according to a preferred embodiment of the present invention as a cross-sectional view. It is. It is sectional drawing explaining the structure of the tunnel lining concrete placement structure which concerns on preferable one Embodiment of this invention. It is a schematic perspective view explaining the structure of the tunnel lining concrete placement structure which concerns on preferable one Embodiment of this invention. It is a simplified expanded side view explaining the structure of the tunnel lining concrete placement structure which concerns on preferable one Embodiment of this invention. The guide piece which has a pipe insertion hole is demonstrated, (a) is the front view which looked at (b) from the right side, (b) is sectional drawing along AA of (a). (A) is explanatory drawing of the state which provided the spiral protrusion on the outer peripheral surface of the guide pipe, (b) is explanatory drawing of the state which provided the rotary blade inclined with respect to the tunnel axial direction on the outer peripheral surface of the guide pipe. It is. (A) is sectional drawing seen from the tunnel axial direction explaining the state which installed the formwork for concrete lining along the inner peripheral surface of a tunnel, (b) is the same side view. (A)-(d) is a side view which shows the work procedure of the conventional tunnel lining concrete placement method, and shows one part as sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Formwork for tunnel lining 11 Covering concrete 11a Covering concrete 12 of a crown part Tunnel 13 Crown part 15 of a tunnel Existing lining concrete 15a End surface 16 of existing lining concrete Endpiece formwork 17 Pipe insertion hole 18 Guide piece 19 Guide Pipe 20 Bar-shaped vibrator 21 Vibrator cable 22 Covering surface 23 Covering space 24 Concrete placing hole 25 Spiral ridge 26 Rotating blade 27 Cord winding device a Guide piece installation interval X Tunnel axial direction X 'Bar-shaped vibrator and guide Pipe moving direction

Claims (8)

In the tunnel lining concrete placement method of forming lining concrete using a tunnel lining formwork,
Guide pieces having pipe insertion holes are arranged in series in the axial direction of the tunnel on the outer peripheral surface of the tunnel lining formwork between the existing lining concrete already formed and the end formwork. A plurality of protruding pipes, and a guide pipe having a smaller diameter than the pipe insertion hole, connected to a rear end portion of a rod-shaped vibrator having a smaller diameter than the pipe insertion hole in a state in which a subsequent vibrator cable is inserted,
While the rod-shaped vibrator and the guide pipe are inserted into the pipe insertion hole and supported by the guide piece, the rod-shaped vibrator is disposed close to the existing lining concrete, and the vibrator cable is extended to the end frame side. It is possible to pull from the outside of the wife formwork by penetrating the wife formwork,
From the existing lining concrete side to the lining space between the outer surface of the tunnel lining formwork and the lining surface of the inner periphery of the tunnel, sandwiched between the end surface of the existing lining concrete and the end formwork In addition to placing concrete, the rod-like vibrator and the guide pipe embedded in the placed concrete are linearly moved toward the end form frame by pulling the vibrator cable with the pipe insertion hole of the guide piece as a guide. Tunnel lining concrete placement method that compacts the concrete while moving it into a shape.   The guide pipe is rotatably connected to the rod-like vibrator, and the guide pipe embedded in the concrete placed in the lining space is moved linearly toward the end form frame while rotating. The tunnel lining concrete placement method according to claim 1.   The tunnel lining concrete placement method according to claim 1 or 2, wherein the lining space is a lining space of a tunnel crown. A tunnel lining concrete placement structure used in the tunnel lining concrete placement method according to any one of claims 1 to 3,
Pipe insertion hole projecting from the outer surface of the tunnel lining formwork between the existing lining concrete and the end formwork, which are arranged in series in the axial direction of the tunnel. A plurality of guide pieces having
The rear end portion of the rod-shaped vibrator having a smaller diameter than the pipe insertion hole is connected in a state in which the subsequent vibrator cable is inserted, and is composed of a guide pipe having a smaller diameter than the pipe insertion hole,
The bar-shaped vibrator and the guide pipe are sandwiched between an end face of the existing lining concrete and the end formwork, and a lining space between an outer peripheral face of the tunnel lining formwork and a lining face on the inner periphery of the tunnel In the state where the rod-shaped vibrator is arranged toward the existing lining concrete, the guide pipe is inserted into the pipe insertion hole and is supported by at least two guide pieces, and the vibrator cable is connected to the wife mold. A tunnel lining concrete placement structure that is attached in a state that it can be pulled from the outside of the wife form frame by extending to the frame side and penetrating the wife form frame.   5. The tunnel lining according to claim 4, wherein a plurality of the guide pieces are provided in series with a fixed installation interval in the axial direction of the tunnel, and the guide pipe has a length greater than twice the installation interval. Concrete placement structure.   The tunnel lining concrete placement structure according to claim 4 or 5, wherein the guide pipe is rotatably connected to the rod-like vibrator.   The tunnel lining concrete placement structure according to claim 6, wherein a spiral protrusion is provided on an outer peripheral surface of the guide pipe. The tunnel lining concrete placement structure according to claim 6, wherein a rotating blade inclined with respect to a tunnel axial direction is provided on an outer peripheral surface of the guide pipe.

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