JP2014070459A - Installation device and installation method for lining concrete wall within tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency by reducing stage replacement work when moving forms in accordance with a method of construction for improving the quality of lining concrete wall within the tunnel by prolonging a curing term of the lining concrete wall within the tunnel by alternately using a plurality of forms.SOLUTION: A plurality of installation areas to install therein forms 2, 3 which may take diameter enlarged states W2, W3 and a diameter reduced state S2 are arranged side by side with each other in a length direction X within a tunnel 1. The plurality of installation areas include a front area P1 at a side of an installation progressing direction XF, a rear area Q1 at a side of an opposite direction XB to the installation progressing direction XF, and an intermediate area R1 between the front area P1 and the rear area Q1. When performing installation successively from the form 2 installed in the rear area Q1, the preceding form 2 brought into the diameter reduced state S2 can be moved to the front area P1 through the inside of the following forms 3 in the diameter enlarged states W2, W3. A movable stage 6 of a support stand 4 has such a length as to support the forms 2, 3, thereby moving from a retracting position 4B over the rear area Q1 and the intermediate area R1 to a forward position 4F over the intermediate area R1 and the front area P1. A transfer stage 7 of the support stand 4 for supporting the form 2 in the diameter reduced state S2 is capable of reciprocating in the length direction X on the movable stage 6. Thus, work efficiency is improved by reducing stage replacement work when moving the forms 2, 3.

Description

  The present invention relates to an apparatus and method for placing a lining concrete wall in a tunnel.

  Conventionally, in order to improve the quality of the lining concrete wall by extending the curing period of the lining concrete wall in the tunnel, two sets of telescopic molds that reduce the diameter in the cross-sectional diameter direction are prepared. There is a method of placing concrete using alternating frames. In the case shown in Patent Document 1 below, for example, the process shown in FIG. 7 is performed.

  In the process shown in FIG. 7 (a), the casting progress is in the direction of extending the lining concrete wall among the three zones P1, Q1, R1 that are separated by the longitudinal direction X in the tunnel 1 and are adjacent to each other. The support base 4 at the intermediate position 4R is installed in the intermediate area R1 sandwiched between the front area P1 on the direction XF side and the rear area Q1 on the XB side opposite to the driving advance direction XF. The placement chamber 10 is provided by the mold 3 supported in the expanded state W3 on the support 4 at the intermediate position 4R. In this step, the concrete wall 11 has already been placed in the placement room 10 in the rear area Q1 and is in a curing state.

  In the step shown in FIG. 7 (b), after the step of FIG. 7 (a), the concrete wall 11 is continuously placed in the placement chamber 10 in the intermediate zone R1 and the concrete wall 11 already placed in the rear zone Q1. After being placed, it is cured for a predetermined period. At the stage when the support of the formwork 3 with respect to the concrete wall 11 is no longer necessary, the support 4 at the intermediate position 4R is moved away from the formwork 3 in the expanded state W3 in the intermediate area R1 to the rear area Q1 and retracted. The mold 2 in the expanded state W2 is supported at the position 4Q.

In the step shown in FIG. 7C, after the step of FIG. 7B, the entire mold 2 in the rear area Q1 is separated downward from the concrete wall 11 in the rear area Q1 to be in a reduced diameter state S2.
In the step shown in FIG. 7 (d), after the step of FIG. 7 (c), the support base 4 in the rear region Q1 is moved to the intermediate region R1 together with the mold 2 in the rear region Q1, and the diameter is expanded at the intermediate position 4R. The mold 2 in the reduced diameter state S2 is arranged inside the mold 3 in the intermediate region R1 in the state W3.

  In the step shown in FIG. 7 (e), after the step of FIG. 7 (d), the support 3 in the intermediate region R1 is in the expanded state W3 together with the mold 2 in the reduced state S2, and the mold 3 in the intermediate region R1. It moves to the front area P1 through the inner side of and is installed at the forward position 4P.

  In the step shown in FIG. 7 (f), after the step of FIG. 7 (e), the mold 2 in the front region P1 is changed from the reduced diameter state S2 to the expanded diameter state W2, and the mold 3 in the intermediate region R1 is moved forward. Forms 2 in the area P1 are arranged in the longitudinal direction X in the tunnel 1, and a placement chamber 10 is provided between the inner periphery of the tunnel 1 and the formwork 2 in the front area P1.

  After one cycle is completed in this way, a new rear area Q2 that is the original intermediate area R1 among the rear area Q1, the intermediate area R1, and the front area P1, which are the three areas shown in FIG. In the next cycle, the placement of the concrete wall 11 is repeated in the same way, with the new front zone P2 that is the original front zone P1 and the new front zone P2 adjacent to the new middle zone R2 as the next three zones. It is.

JP 2008-308855 A

  As described above, the support table 4 that supports the molds 2 and 3 is moved from the intermediate area R1 to the rear area Q1, and then again moved through the intermediate area R1 to the front area P2, so that the intermediate position 4R is moved in one cycle. And a reverse position 4Q and a forward position 4P. For each of the three movements to the respective positions 4R, 4Q, and 4P, it is necessary to replace the equipment necessary for excavation work such as the wind pipes and belt conveyors installed on the support base. Therefore, in the operation of placing the concrete wall 11 in the tunnel 1, the time and labor required for moving the support base 4 increase as the molds 2 and 3 have a larger inner diameter.

  The present invention relates to a method for changing the formwork when moving a formwork in a method for improving the quality of the lining concrete wall by lengthening the curing period of the lining concrete wall in the tunnel by using a plurality of formwork alternately. The purpose is to reduce work and improve work efficiency.

The present invention will be described with reference to the drawings of the following embodiments (the first embodiment shown in FIGS. 1 to 4, the second embodiment shown in FIG. 5, and the third embodiment shown in FIG. 6).
In the apparatus for placing a lining concrete wall in a tunnel according to the invention of claim 1, a formwork (2, 3) capable of taking an expanded state (W2, W3) and a reduced diameter state (S2) is installed. A plurality of placement areas (Q1, R1, P1) are arranged in the longitudinal direction (X) in the tunnel (1), and the formwork that has been reduced in diameter after placing concrete is passed through the inside of the formwork in an expanded state, It can be changed to the direction of concrete placement. And the support stand which has the length which can support the formwork (2, 3) over at least 2 continuous placement area (Q1, R1, P1), and can move to concrete placement progress direction (XF) ( 4), and the mold (2) in the reduced diameter state (S2) is supported on the support base (4) so as to be movable in the longitudinal direction (X).

  For example, as shown in the first and second embodiments, the plurality of placement areas are divided in the longitudinal direction (X) in the tunnel (1), and the concrete placement progress direction (XF) among the three areas arranged side by side. It is sandwiched between the front area (P1) on the side, the rear area (Q1) on the opposite side (XB) to the concrete placement direction (XF), and the front area (P1) and the rear area (Q1) In the intermediate region (R1), the support (4) is moved from the retracted position (4B) including the rear region (Q1) and the intermediate region (R1) to the intermediate region (R1) and the front region (P1). Can be moved to the forward position (4F).

  Further, as shown in the third embodiment, for example, the plurality of placement areas are divided in the longitudinal direction (X) in the tunnel (1) and out of the three areas aligned with each other, the concrete placement progress direction (XF) It is sandwiched between the front area (P1) on the side, the rear area (Q1) on the opposite side (XB) to the concrete placement direction (XF), and the front area (P1) and the rear area (Q1) In the intermediate region (R1), the support base (4) is moved from the retracted position (4B) including the rear region (Q1) and the intermediate region (R1) to the rear region (Q1) and the intermediate region (R1). And the forward position (4F) including the front area (P1).

  In the invention of claim 1, since the support base (4) having a length capable of supporting the formwork (2, 3) extending over at least two continuous placement areas (Q1, R1, P1) is provided, this support is provided. The mold (2) in the reduced diameter state (S2) can be supported on the table (4) and moved in the longitudinal direction (X). Therefore, the direction in which the support base (4) is moved during the operation of placing the concrete wall (11) in the tunnel (1) can be set to the concrete placement direction (XF) only.

  For example, among the three zones in which the plurality of placement zones are divided by the longitudinal direction (X) in the tunnel (1) and are lined up with each other, the front zone (P1) on the concrete placement direction (XF) side and the concrete When it is the rear area (Q1) on the opposite side (XB) side to the driving direction (XF) and the intermediate area (R1) sandwiched between the front area (P1) and the rear area (Q1), In one cycle, the support base (4) includes a backward position (4B) including the rear area (Q1) and the intermediate area (R1), and an advanced position (4F) including the intermediate area (R1) and the front area (P1). Or the conventional three positions (intermediate position 4R, since it is only installed in two positions of the forward position (4F) including the rear area (Q1), the intermediate area (R1) and the front area (P1). Compared with the installation of the support base (4) at the backward position 4B and the forward position 4P) Support table bets wall (11) during operation of pouring the number of times the moving (4) can be reduced dose.

  In the invention of claim 2 premised on the invention of claim 1, the support base (4) supports a movable base (6) capable of moving in a concrete pouring direction (XF) and a formwork (2). And a transfer table (7) that can move in the longitudinal direction (X) on the movable table (6). In the invention of claim 2, since the transfer table (7) moves together with the movable table (6) and can move in the longitudinal direction (X) on the movable table (6), the transfer table (7) is transferred on the movable table (6). The formwork (2) can be easily moved by the table (7).

  In the method of placing the lining concrete wall in the tunnel according to the invention of claim 3, among the three continuous areas (Q1, R1, P1) that are divided and arranged in the longitudinal direction (X) in the tunnel (1) Above the support base (4) installed over the rear area (Q1) on the opposite side (XB) side to the concrete placement direction (XF) and the intermediate area (R1) adjacent to the rear area (Q1) The formwork (2) installed in the rear area (Q1) and the formwork (3) installed in the middle area (R1) are aligned with each other in the longitudinal direction (X) in the tunnel (1), and the diameter is increased. After the concrete wall (11) is placed in the placement chamber (10) provided by the mold (2) in the rear area (Q1), the diameter is increased by the mold (3) in the intermediate area (R1). While placing the concrete wall (11) in the casting chamber (10) and curing, After finishing the curing of the wall (11), the mold (2) in the rear area (Q1) is reduced in diameter, and is passed through the inside of the mold (3) in the enlarged intermediate area (R1) on the support base (4). Then, the direction is changed to the direction of the front area (P1), and the support base (4) is moved to the direction of the front area (P1).

  In the invention of claim 3, in one cycle, the support base (4) includes a rearward position (4B) including a rear region (Q1) and an intermediate region (R1), an intermediate region (R1), and a front region (P1). Or the forward position (4F) including the rear area (Q1), the intermediate area (R1) and the front area (P1). Compared with the installation of the support base (4) at the three positions (intermediate position 4R, reverse position 4B, forward position 4P), the support base (4) during the operation of placing the concrete wall (11) in the tunnel (1) ) Can be reduced by one time.

  The present invention, when alternately using a plurality of formwork (2, 3), to improve the quality of the lining concrete wall by extending the curing period of the lining concrete wall in the tunnel (1), It is possible to improve the work efficiency by reducing the setup change work when moving the formwork (2, 3).

(A)-(f) is process drawing which shows the placement method of the lining concrete wall in the tunnel in 1st Embodiment mentioned later. (A) is the A1-A1 line sectional view of Drawing 1 (a), Drawing 5 (a), or Drawing 6 (a), and (b) is Drawing 1 (a), Drawing 5 (a), or Drawing 6 ( It is A2-A2 sectional view taken on the line of a). (A) is a sectional view taken along line B1-B1 of FIG. 1 (b), FIG. 5 (b) or FIG. 6 (b), and (b) is FIG. 1 (c), FIG. 5 (c) or FIG. It is B2-B2 sectional view taken on the line of c). (A) is a sectional view taken along line C1-C1 of FIG. 1 (d), FIG. 5 (d) or FIG. 6 (d), and (b) is FIG. 1 (e), FIG. 5 (e) or FIG. It is the C2-C2 sectional view taken on the line of e). (A)-(f) is process drawing which shows the placement method of the lining concrete wall in the tunnel in 2nd Embodiment mentioned later. (A)-(f) is process drawing which shows the placement method of the lining concrete wall in the tunnel in 3rd Embodiment mentioned later. (A)-(f) is process drawing which shows the placement method of the lining concrete wall in the conventional tunnel.

Hereinafter, a placing apparatus and a placing method for a lining concrete wall in a tunnel according to a first embodiment of the present invention will be described with reference to FIGS.
The placement device shown in FIGS. 1 (a) and 2 (a) (b) includes a support base 4 installed below both molds 2 and 3 arranged in the longitudinal direction X in the tunnel 1. Yes. The support base 4 is movable with the movable base 6 along the rails 5 arranged on both sides of the width direction Y orthogonal to the longitudinal direction X and the movable base 6. A transfer table 7 capable of reciprocating in the longitudinal direction X is provided. The mold frames 2 and 3 are divided into ceiling division frames 2a and 3a arranged facing the ceiling portion in the tunnel 1, and both side division frames 2b connected to both sides in the width direction Y of the ceiling division frames 2a and 3a. 3b and lower end split frames 2c and 3c connected to the lower ends of both side split frames 2b and 3b. These divided frames 2 a, 3 a, 2 b, 3 b, 2 c, 3 c are arranged in an arch shape along the inner periphery of the tunnel 1. The longitudinal dimension of the movable table 6 is longer than the longitudinal dimension of the two mold frames 2 and 3 arranged side by side, and both sides of the movable table 6 in the longitudinal direction X protrude from the mold frames 2 and 3 in the longitudinal direction X. Yes. In the tunnel 1, a wind tube 8 and a conveyor 9 are extended in the longitudinal direction X.

Next, the operation (placement method) of the placement apparatus will be described.
In the process shown in FIG. 1 (a), of the three zones P1, Q1, and R1 (placed zones) that are separated by the longitudinal direction X in the tunnel 1 and are lined up with each other, it is a direction that extends the lining concrete wall. The support 4 is installed at the retreat position 4B across the intermediate region R1 and the rear region Q1 sandwiched between the front region P1 on the installation progress direction XF side and the rear region Q1 on the XB side opposite to the placement progress direction XF. ing. Above the support 4, the mold 2 installed in the rear area Q1 and the mold 3 installed in the intermediate area R1 are arranged in the longitudinal direction X in the tunnel 1 in the expanded diameter states W2 and W3, respectively. ing. In this step, the concrete wall 11 has already been placed in the placement chamber 10 in the rear area Q1 and is in a curing state.

  As shown in FIGS. 1 (a) and 2 (a), in the rear area Q1, the ceiling division frame 2a of the mold 2 is in an unsupported state with respect to the transfer table 7, and both side division frames 2b of the mold 2 are provided. Is supported by the movable table 6 by the jacks 6a and 6b, and both lower end division frames 2c of the mold 2 are fixed to the floor in the tunnel 1. Concrete has already been cast in the casting chamber 10 provided by the inner periphery of the tunnel 1 and the mold 2 in the rear area Q1, and in order to further improve the strength and durability after the self-supporting strength development, It is in a state of being cured within the frame.

  As shown in FIGS. 1 (a) and 2 (b), in the intermediate region R1, the ceiling division frame 3a of the mold 3 is supported by the transfer table 7 by both jacks 7a, and the both-side division frames 3b of the mold 3 are supported. Is supported on the transfer table 7 by both cylinders 7b and supported by the movable table 6 by the jacks 6a and 6b, and both lower end split frames 3c of the mold 3 are fixed to the floor portion in the tunnel 1. In the state of FIG. 2 (b), the concrete wall 11 of the intermediate zone R1 is not yet placed in the placement chamber 10 provided by the inner periphery of the tunnel 1 and the mold 3 of the intermediate zone R1. The concrete wall 11 is placed in the placement chamber 10 while the ceiling dividing frame 3a is supported by the switchboard 7, and is cured in that state for a predetermined curing period in which the self-supporting strength is developed.

  In the state of FIG. 1B, which is the next step, after removing both jacks 7a supporting the ceiling dividing frame 3a of the intermediate region R1 where the self-supporting strength of the concrete wall 11 is expressed, the rear region Q1 and the intermediate region are removed. Above the movable table 6 installed at the retreat position 4B across R1, only the transfer table 7 retreats from the intermediate region R1 to the rear region Q1.

  In the process shown in FIG. 1 (c), in the rear area Q1, as shown in FIG. 3 (b), after the process of FIG. The jacks 6a and 6b are removed, and the lower end split frames 2c of the mold 2 are removed from the floor in the tunnel 1, bent upward with respect to the split frames 2b and held by the cylinder 12, and The ceiling division frame 2a is supported on the transfer table 7 by both jacks 7a, and the both-side division frame 2b moves downward while being supported on the transfer table 7 by both cylinders 7b. For this reason, the entire mold 2 in the rear area Q1 is spaced apart from the concrete wall 11 in the rear area Q1 with a space 13 downward to be in a reduced diameter state S2. In this reduced diameter state S2, the jacks 6a, 6b between the both-side divided frame 2b and the movable base 6 are removed.

  In the process shown in FIG. 1 (d), after the process of FIG. 1 (c), the movable base 6 of the support base 4 is intermediate from the rear area Q1 and the intermediate area R1 together with the transfer base 7 and the mold 2 in the rear area Q1. It is moved over the region R1 and the front region P1 and installed at the forward position 4F. In the intermediate region R1, as shown in FIG. 4A, the mold 2 in the reduced diameter state S2 is arranged inside the mold 3 in the intermediate region R1 in the expanded diameter state W3.

  In the step shown in FIG. 1 (e), after the step in FIG. 1 (d), the formwork in the reduced diameter state S2 above the movable platform 6 installed at the forward position 4F across the intermediate zone R1 and the front zone P1. 2 is transferred to the front area P1 while being placed on the transfer table 7 through the inside of the mold 3 in the intermediate area R1 in the expanded diameter state W3. In the front region P1, as shown in FIG. 4B, the mold 2 in the reduced diameter state S2 faces the inner periphery of the tunnel 1 as a mold 2 in the front region P1 with a space 14 therebetween.

  In the step shown in FIG. 1 (f), after the step of FIG. 1 (e), the mold 2 in the front region P1 is expanded from the reduced diameter state S2 to the transfer table 7 in the same manner as in the state of FIG. 2 (a). The mold 2 in the front region P1 is located in the tunnel 1 with respect to the mold 3 in the intermediate region R1 above the support 4 that is in the radial state W2 and is installed at the forward position 4F across the intermediate region R1 and the front region P1. They are arranged in the longitudinal direction X. A placement chamber 10 is provided between the inner periphery of the tunnel 1 and the mold 2 in the front area P1.

  After one cycle is completed in this way, a new rear area Q2 that is the original intermediate area R1 among the rear area Q1, the intermediate area R1, and the front area P1, which are the three areas shown in FIG. The new intermediate area R2 which is the original front area P1 and the new front area P2 adjacent to the new intermediate area R2 are set as the next three areas (placed areas), and the concrete wall 11 is driven in the next cycle. The setting is repeated in the same way.

  In the second embodiment shown in FIGS. 5A to 5F, the movable base 6 of the support base 4 is moved from the rear area Q1 and the intermediate area R1 to the intermediate area R1 and the front area P1 as compared with the first embodiment. The mold 2 that has been installed in the rear area Q1 and has finished curing the concrete wall 11 is installed on the transfer table 7 of the support base 4, and the inside of the mold 3 in the intermediate area R1. The procedure for switching to the front area P1 is changed. That is, in the step shown in FIG. 5 (d), after the step shown in FIG. 5 (c), first, the diameter-reduced state is above the movable table 6 installed at the retracted position 4B across the rear region Q1 and the intermediate region R1. The transfer table 7 on which the mold 2 of S2 is placed is transferred to the inside of the mold 3 in the intermediate area R1 in the expanded diameter state W3, and inside the mold 3 in the expanded diameter W3 in the intermediate area R1. The molds 2 in the reduced diameter state S2 are arranged. Next, as shown in FIG. 5 (e), the movable table 6 of the support table 4 is moved from the rear region Q1 and the intermediate region R1 to the intermediate region R1 and the front region P1 together with the transfer table 7 and the mold 2 of the rear region Q1. And the mold 2 in the reduced diameter state S2 is transferred to the front region P1.

  Moreover, in 3rd Embodiment shown to Fig.6 (a)-(f), the length of the longitudinal direction X in the movable stand 6 of the support stand 4 is further set | placed 1 area | region than the movable stand 6 of 1st Embodiment. It's a minute longer. In the process shown in FIG. 6 (a), the movable platform 6 is installed at the retreat position 4B including the rear area Q1 and the intermediate area R1 in a state where the movable base 6 extends further rearward by one placement area from the rear area Q1. In the step shown in FIG. 6B, the movable table 6 is moved and installed at the forward position 4F extending over the rear area Q1, the intermediate area R1, and the front area P1, and only the transfer table 7 is located on the movable table 6 in the intermediate area. Retreat from R1 to rear area Q1. In the steps shown in FIGS. 6C, 6D, 6E, and 6F, only the transfer table 7 is the same as that shown in FIG. c) Move in the same manner as shown in steps (d), (e), and (f). Therefore, the mold 2 supported by the transfer table 7 can be moved from the rear area Q1 to the front area P1 without moving the movable table 6 at the forward movement position 4F.

This embodiment has the following effects.
Since the mold 2 in the reduced diameter state S2 is supported on the support base 4 and can be reciprocated in the longitudinal direction X, the direction in which the support base 4 is moved during the operation of placing the concrete wall 11 in the tunnel 1 is determined. Can only be forward.

  That is, the movable table 6 of the support table 4 is only installed at two positions, that is, the retracted position 4B extending from the rear area Q1 to the intermediate area R1 and the forward position 4F extending from the intermediate area R1 to the front area P1 in one cycle described above. Compared with the prior art, the number of times the support 4 is moved during the operation of placing the concrete wall 11 in the tunnel 1 can be reduced by one. Therefore, when the support base 4 is moved, the time and labor required for the replacement work of the equipment installed on the support base 4 can be reduced. Therefore, the process of placing the concrete wall 11 in the tunnel 1 can be simplified and work efficiency can be improved.

For example, the following embodiment may be configured as follows.
-In the support stand 4, the transfer stand 7 may be abbreviate | omitted and the wheel installed in the formwork 2 may be set as the structure which moves on the movable stand 6 directly. Alternatively, the mold 2 may be directly assembled on the movable platform 6 at two positions, ie, a forward position and a backward position.

  Even if the length of the support base 4 is slightly shorter than the total length of the two sets of molds 2 and 3, the molds 2 and 3 can be moved from the rear area Q1 to the front area P1 while the support base 4 is installed at a fixed position. As long as it can be moved and installed, the effect of the present invention does not change. Further, in this embodiment, the case where three sets of molds 2 and 3 are used to lay concrete lining in three regions (the rear region Q1, the intermediate region R1 and the front region P1) is illustrated. The same effect can be achieved by using a support base with a suitable length even when using four frames of lining concrete using a frame or when using four or more sets of formwork. Needless to say. In addition, as an effect of the present invention, the improvement of work efficiency in the construction method that lengthens the curing period is sought, but if the curing period is the same as when a single centle is used, it is a technique that can cope with rapid construction. It can also be said.

DESCRIPTION OF SYMBOLS 1 ... Tunnel, 2 ... Formwork, 3 ... Formwork, W2, W3 ... Diameter expansion state of mold, S2 ... Diameter reduction state of formwork, 4 ... Support stand, 4F ... Advance position of support stand, 4B ... Support Back position of base, 6 ... movable base of support base, 7 ... transfer base of support base, 10 ... concrete placement room, 11 ... concrete wall, Q1 ... rear area (placement area), R1 ... middle area (placement) Installation area), P1... Front area (placement area), X... Longitudinal direction, XF...

Claims (3)

Arrange a plurality of placement areas in the tunnel in the longitudinal direction to install the formwork that can take the expanded diameter state and the reduced diameter state. In the lining concrete wall casting device in the tunnel, which can be transferred to the concrete casting direction through the inside,
A support base having a length capable of supporting the formwork over at least two consecutive placement areas and capable of moving in the direction of concrete placement;
An apparatus for placing a lining concrete wall in a tunnel, characterized in that the reduced-diameter formwork is supported on the support stand so as to be movable in the longitudinal direction.   The said support stand is provided with the movable stand which can move to concrete pouring progress direction, and the transfer stand which can support a formwork and can move to a longitudinal direction on a movable stand. Equipment for lining concrete walls in tunnels as described in 1. Of the three consecutive areas that are separated and aligned in the longitudinal direction in the tunnel, the rear is located above the support base installed across the rear area on the opposite side to the concrete placement direction and the intermediate area adjacent to the rear area. The formwork installed in the area and the formwork installed in the middle area are aligned with each other in the longitudinal direction in the tunnel,
After placing the concrete wall in the casting room provided by the mold of the expanded rear area, and then placing the concrete wall in the casting room provided by the mold of the enlarged intermediate area and curing Next, after finishing the curing of the concrete wall, the rear formwork is reduced in diameter, transferred to the front area on the support base through the inside of the enlarged intermediate area formwork, and the support base is moved forward. A method of placing a lining concrete wall in a tunnel, characterized by moving in the region direction.