JP3153852B2 - Tunnel lining equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel lining apparatus and a tunnel lining method for lining a tunnel excavated by a tunnel digging machine, a supporting form used for the tunnel lining, and a supporting form. The present invention relates to a tunnel structure constituted by:

[0002]

2. Description of the Related Art FIG. 12 shows an outline of a general shield excavator, FIG. 13 shows an outline of an automatic segment assembling apparatus, and FIG. 14 shows an outline of an assembled state of segments.

As shown in FIG. 12, in a shield excavator, an excavator main body 101 has a cylindrical shape, and a cutter head 102 is rotatably mounted on a front portion of the excavator main body 101. A number of cutter bits 103 for excavating the ground in front are fixed to the front surface 102, and can be driven and rotated by a cutter driving motor (not shown). The excavator body 101 has a plurality of shield jacks 104 arranged in parallel along a plurality of circumferential directions.
04 extends rearward in the excavation direction of the tunnel excavator, and can move forward by a pressing reaction force against the segment S assembled on the inner peripheral surface of the tunnel.

[0004] Behind the excavator body 101, an automatic segment assembling device 105, a segment transport device 106, and a perfect circle holding device 107 are provided, and a transport vehicle 108 is connected thereto. This segment automatic assembly device 105
As shown in FIG. 13, a first slide frame 111 is provided on a vertically movable frame 110 which is vertically movable with respect to a support frame 109 connected to a rear portion of the excavator main body 101, and a second slide is provided. A frame 112 is provided to be movable left and right.
2, a segment holding member 113 is provided so as to swing back and forth and left and right.

Accordingly, when a large number of segments S are carried into the existing tunnel, the segments S are transported forward by the segment transporting device 106, and the automatic segment assembling device 105 holds the segments S and holds them in a predetermined group. Then, this segment S is assembled on the inner wall surface of the existing tunnel. The perfect circle holding device 107 presses the inner peripheral surface of the segment S assembled in a ring shape and holds the same in a perfect circle, and connects the adjacent segments S in this state to form the tunnel structure T. . At this time, as shown in FIG. 14, the segments S are assembled in close contact with each other in the circumferential direction and the front-rear direction of the existing tunnel, and the adjacent segments S are connected to each other by bolts B and nuts N.

FIG. 15 shows an outline of a tunnel lining method by a direct-strike ECL method, and FIG. 16 shows an outline of a tunnel lining method by an ECL method using a reinforcing bar.

[0007] Fig. 15 shows a directly-extruded ECL (Extruded ECL) in which concrete is directly poured without using segments.
Concrete tailing method, a tail plate 201 having substantially the same shape as the excavator body is provided at the rear of the excavator body (not shown).
A concrete pressure ring 202 is provided along an inner peripheral surface of the concrete pressure ring 202, and a seal member 203 is attached to an outer peripheral surface and an inner peripheral surface of the concrete pressure ring 202. The concrete pressure ring 202 can be moved behind the existing tunnel by the pressure jack 204. A concrete casting nozzle 205 is provided at the rear of the concrete pressure ring 202, and concrete C supplied from a concrete supply device (not shown) is discharged from the concrete casting nozzle 205. On the other hand, an unillustrated erector device for assembling the movable form F is provided behind the excavator body, and the erector apparatus assembles the movable form F carried into the tunnel at a predetermined position.

Therefore, when the tunnel is excavated and formed by the excavator, the movable form F is assembled in a ring shape by the erector device. The concrete pressure ring 202 is located between the inner wall surface of the tunnel and the movable form F, and is formed between the concrete casting nozzle 205 and the seal member 203 while preventing leakage of concrete into the excavator body. The concrete C is discharged into the formed space to form a tunnel structure.

FIG. 16 shows an ECL method using a reinforcing bar. A tail plate 301 having substantially the same shape as that of the excavator body is provided at the rear of the excavator body (not shown). A concrete pressure ring 302 is provided along the inner peripheral surface of the plate 301, and the concrete pressure ring 302 can be moved behind an existing tunnel by a pressure jack 303. Further, a mold pressing ring 304 is provided on the inner peripheral surface of the tail plate 301, and the mold pressing ring 304 can be moved behind an existing tunnel by a propulsion jack 305. Furthermore, the concrete casting pipe 30 is attached to the movable form F which is assembled at a predetermined interval with the inner wall surface of the existing tunnel.
6 can be connected. On the other hand, an unillustrated erector device for assembling the movable form F and the reinforcing bar I is provided behind the excavator body.

Therefore, when the tunnel is excavated and formed by the excavator, the rebar I and the movable form F
Are assembled in a ring shape. Then, the concrete pressure ring 202 presses the reinforcing bar I, and the form pressing ring 304
Presses and supports the movable formwork F,
From 06, concrete C is discharged into the space between the inner wall surface of the existing tunnel and the movable form F to form a tunnel structure.

[0011]

The above-mentioned segment S
In the tunnel structure T (see FIG. 12) using
Although the rigidity of the tunnel itself is sufficiently ensured, since the weight of the segment S is large, the segment transport device 106
In addition, the size of the automatic segment assembling apparatus 105 must be increased, the equipment cost increases, the assembling time increases, and the positioning accuracy becomes troublesome. Further, since the connection of the segments S is performed by the bolts B and the nuts N, there is a problem that the cost is high and the assembling time is long.

On the other hand, in the case of a tunnel structure formed by casting concrete (see FIGS. 15 and 16), although the equipment cost is low and the assembling time is short, the rigidity of the tunnel itself is lower than that of the one using a segment. When reinforced concrete is used, rust prevention treatment is required, which makes the operation cumbersome, and it is difficult to provide a reinforcing member inside the concrete. Further, there is a problem that cracks and voids are easily generated in the tunnel structure, and water leakage and skin fall are induced.

The present invention solves such a problem, and a tunnel lining apparatus and a tunnel lining method which ensure sufficient strength and improve workability while reducing equipment costs, and It is another object of the present invention to provide a support mold used for the tunnel lining, and a tunnel structure constituted by the support mold.

[0014]

According to the present invention, there is provided a tunnel lining apparatus comprising: an outer peripheral ring provided along an inner wall surface of an existing tunnel; A plurality of support molds movably mounted along a radial direction of the mold; a mold assembling means for arranging the support molds in a ring at predetermined intervals on an inner wall surface of the existing tunnel; Formwork moving means for moving the movable formwork outward from the support formwork assembled at a predetermined interval on an inner wall surface, a wand frame ring positioned between the outer peripheral ring and the support formwork, A wife frame moving means for movably supporting the wife frame ring along the longitudinal direction of the existing tunnel, and a pressing member capable of contacting an end surface of the supporting formwork,
Pressing means for movably supporting the pressing member along the longitudinal direction of the existing tunnel and pressing and positioning the supporting formwork via the pressing member; and positioning the pressing tunnel from the rear end face of the end frame ring. Concrete placing means for placing concrete in a space between the inner wall surface and the positioned supporting formwork is provided.

Further, the tunnel lining method of the present invention is characterized in that, for a tunnel having a predetermined sectional shape excavated by an excavator, a plurality of supporting molds curved at predetermined intervals on the inner wall surface of the existing tunnel are provided in the circumferential direction. The plurality of supporting molds are arranged side by side along the ring and the plurality of supporting molds are connected and fixed to each other, and the movable mold mounted outside the plurality of supporting molds connected in the ring shape is moved outward, The end face of the supporting form is pressed by the pressing member along the longitudinal direction of the existing tunnel to be supported, and the end frame ring is provided between the outer peripheral ring provided along the inner wall surface of the existing tunnel and the supporting form. And in this state, concrete is poured into a space between the inner wall surface of the tunnel and the plurality of supporting forms to form a tunnel structure.

Further, the supporting form of the tunnel structure of the present invention has a rectangular shape in plan view and has side walls connected to four sides of a flat portion curved along the inner wall surface of the existing tunnel, and the outside is opened. A box form, a form outer plate movably supported in the box form, and a rib on the inner peripheral surface, the box form being movable outward from the box form by the form form plate. And a movable form buried in the tunnel structure.

Further, the tunnel structure of the present invention is constructed such that a movable mold is moved outward from a support mold assembled in a ring shape at predetermined intervals on an inner wall surface of an excavated tunnel, and an inner wall surface of an existing tunnel is formed. The concrete is cast between the inner wall surface of the tunnel and the ring-shaped supporting form while the movable form is buried in a state where the concrete is held at a substantially intermediate position between the movable form and the supporting form. Is formed by removing the supporting mold after solidification.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic diagram of a tunnel lining device according to an embodiment of the present invention, FIGS. 2 to 5 are schematic diagrams for explaining a lining method by the tunnel lining device of the present embodiment, and FIG. Sections of a tunnel structure formed by the tunnel lining method of the embodiment, FIGS. 7 to 10 schematically illustrate a method for holding the movable formwork, and FIG. 11 shows a structure formed by the tunnel lining method of another embodiment. 2 shows a cross section of a tunnel structure that has been made.

As shown in FIGS. 1 and 6, a tunnel structure 1 formed by the tunnel lining device of the present embodiment.
Reference numeral 1 denotes a plurality of support molds 13 arranged side by side in a ring on the inner wall surface 12 of the existing tunnel at a predetermined interval, and a predetermined distance outward from a box mold 14 of the support mold 13 by a mold outer plate 15. A plurality of movable molds 16 which are moved and arranged in a ring shape, and concrete 17 which is cast in a space between the inner wall surface 12 of the existing tunnel and a plurality of ring-shaped support molds 13. It is configured.

In the tunnel lining device of the present embodiment for forming the tunnel structure 11, a plurality of propulsion jacks 22 are arranged in a circumferential direction on an inner peripheral portion of a skin plate 21 of a tunnel excavator as an outer ring. A pushing member 24 is attached to the tip of a drive rod 23 extending rearward of the propulsion jack 22. The pressing member 24 is formed with a stepped portion 24a to which the end of the movable mold frame 16 is fitted to be flush.

The skin plate 21 has a plurality of wedge frame jacks 25 arranged on the inner periphery thereof outside the propulsion jack 22 in the circumferential direction.
The end of the drive rod 26 extending rearward of the fifth frame 5 is provided with a frame ring 27. The pressing ring 27 is formed with a concave portion 27a into which the movable mold 16 is inserted so that the cross section has a U-shape, and a seal member 28 is mounted in the concave portion 27a. Further, the end frame ring 27 has an outer peripheral surface located opposite to the inner peripheral surface of the skin plate 21, a seal member 29 is attached thereto, and the inner peripheral surface has a movable mold 16.
Further, a seal member 30 is attached so as to face the outer peripheral surface of the pressing member 24. Furthermore, skin plate 21
A concrete pipe 31 is disposed on the inner peripheral portion along the tunnel excavation direction, and a tip end of the concrete pipe 31 is connected to a concrete casting nozzle 32 attached to the end frame ring 27.

On the other hand, a swivel ring 33 is supported by a drive unit (not shown) at the rear of the skin plate 21, and a plurality of form erectors 34 are mounted on the swivel ring 33. The form erector 34 is movable outward and has a holding part 35 for holding the box form 14 of the support form 13 and a holding rod 36 for holding the support part 15a of the form outer plate 15. I have.

By the way, the supporting form 13 of the present embodiment is
As described above, the side wall 14b is for forming a part of the tunnel structure 11, and is formed of a steel plate, and the side wall 14b is formed integrally with the outer peripheral portion of the inner plate 14a curved along the inner wall surface of the existing tunnel. And a support portion 15a which is movably supported in the box form 14 via a seal 18 in the radial direction of the existing tunnel and penetrates the inner plate 14a of the box form 14. And a movable mold 16 mounted on the outer peripheral surface of the mold outer plate 15 via a plurality of ribs 16a and having a step 16b formed at one end.

Here, the operation of the tunnel lining device of the present embodiment will be described.

The shield excavator (not shown) excavates the ground in front by rotating the cutter head while rotating the skin plate 21 to excavate, for example, a tunnel having a circular cross section. A large number of supporting molds 13 are carried in by a carrier truck (not shown), and a mold erector 34 holds the supporting molds 13 and assembles them on the inner wall surface of the existing tunnel. In this case, FIG.
As shown in FIG. 3, in order to assemble the plurality of support molds 13 into a ring shape, the support mold 1 which is long in the circumferential direction of the existing tunnel is used.
3A and four short supporting molds 13B are required respectively, and the number of mold erectors 34 is also required.

In the case where the plurality of form erectors 34 respectively support the supporting form 13 (13A, 13B), each form erector 34 first has the box form 1 having the form outer plate 15.
4 and then the movable form 16 is held. More specifically, as shown in FIG. 7, when the box forms 14A and 14B having the form outer plate 15 are carried into the existing tunnel,
The swivel ring 33 is swiveled by a predetermined angle to form erect 3
4 sequentially holds the box forms 14A and 14B. on the other hand,
The movable forms 16 and 16B are also carried into the existing tunnel, and as shown in FIGS. 8 and 9, the form erector 34 sequentially holds the movable forms 16A while holding the box form 14A. As shown in FIG. 10, the mold erector 34 sequentially holds the movable form 16B while holding the box form 14B. In this way, all of the mold erectors 34 hold the long support mold 13A and the short support mold 13B, but the support mold 13A and the support mold 13B do not contact each other.
Both can be shifted in the longitudinal direction of the existing tunnel.

Then, as shown in FIG.
Supporting formwork 13 (13A, 13B) holding and operating 3
Is positioned at an assembly standby position adjacent to the support mold 13 already assembled. Next, as shown in FIG. 2, the supporting form 13 held by operating each form erector 34 is moved outward, that is, toward the inner wall surface 12 of the existing tunnel, and is continuously connected to the existing supporting form 13. So that the inner peripheral surface is flush with the mounting position. Here, adjacent supporting molds 13 are connected and fixed to each other by bolts, welding, one-touch joints, or the like (not shown). At this time, the propulsion jack 22 is extended, and the support mold 13 held by the mold erector 34 is pressed by the pressing member 24 against the existing support mold 13 to be held. Subsequently, the other supporting molds 13 are similarly assembled into a ring shape. At this time, as shown in FIG. 6, each of the support molds 13A and 13B has an inclined surface at the circumferential end, and the support mold 13A is assembled first, and then the support mold 13B is assembled therebetween. The ring-shaped supporting mold 13 formed by the supporting molds 13A and 13B can be made almost a perfect circle.

When the ring-shaped support frame 13 is formed by the support frame 13A, 13B, the jack frame 2
5 is contracted to move the end frame ring 27 locked to the end of the existing movable formwork 16 forward in the excavation direction, the outer peripheral seal member 29 is on the skin plate 21, and the inner peripheral seal member 30 is on the pressing member. 24 at positions where they are in contact with each other. When the supporting frame 13 is assembled and the end frame ring 27 is moved forward, the frame elector 34 presses the support portion 15a via the holding rod 36 to move the frame outer plate 15 outward. Then, the step portion 16b is locked to the end of the existing form outer plate 15, and the adjacent form outer plates 15 are connected to each other,
Subsequently, as shown in FIG. 4, the end frame jack 25 is extended to move the end frame ring 27 backward in the excavation direction, and the concave portion 27 a
Is locked to the end of the movable mold 16.

In this state, the concrete supplied through the concrete pipe 31 is supplied to the concrete casting nozzle 3.
2 and the inner wall 12 of the existing tunnel and the supporting form 1
Fill the space between 3 with concrete. At this time, a seal 18 is provided between the form outer plate 15 and the box form 14.
The end of the movable form 16 and the end frame ring 27
A seal member 28 is interposed between the recess 27a and the outer peripheral seal member 29 between the end frame ring 27 and the skin plate 21, and an inner peripheral seal member 30 Respectively, so that the concrete filled in the space between the inner wall surface 12 of the existing tunnel and the support frame 13 does not leak to the outside. Actually, there are a plurality of concrete casting nozzles 32, and the space between the inner wall surface 12 of the existing tunnel and the movable mold 16 is filled with concrete, but the movable mold 16 has a large number of through holes (not shown). The movable form 16 and the form outer plate 15
And flows into the space.

As described above, while the space between the inner wall surface 12 of the existing tunnel and the support form 13 is filled with concrete,
The propulsion jack 22 is extended to obtain the propulsion reaction force from the support form 13 to advance the skin plate 21, that is, the excavator body. Then, when the skin plate 21 moves by the width of the supporting form 13 and the space between the inner wall surface 12 of the existing tunnel and the supporting form 13 is filled with concrete as shown in FIG. Stop discharging concrete from. Thereafter, as shown in FIG. 1, the propulsion jacks 22 are contracted one by one, and the new support mold 16 is sequentially assembled in the space between the existing support mold 13 and the pressing member 24, and the above-described operation is repeated. Do it. Thus, the tunnel structure 11 is formed.

Then, after the concrete 17 is hardened, the box form 14 of the support form 13 is removed, but usually 10 to 20 pieces are connected along the longitudinal direction of the tunnel. That is, the cycle in which the box form 14 attached farthest from the rear portion of the skin plate 21 is removed (not shown), transferred forward, and assembled again by the form elector 34 is repeated.

When the tunnel structure 11 is covered with the movable form 15 and the concrete 17 as described above, the inner wall surface of the existing tunnel is constituted by the box form 14, so that the secondary form for makeup can be obtained. No lining is required, and rust-proofing and fire-resistant treatments are applied according to the purpose of use of the tunnel. Further, the box frame 14 has a structure capable of stopping water with a seal material, and after the box form 14 is removed, the seal material may be inserted and assembled.

In the above embodiment, the supporting form 1
Although four are used as the long supporting frame 13A and the short supporting frame 13B in the circumferential direction of the existing tunnel, the present invention is not limited to this. For example, as shown in FIG. 11, a movable mold 41 having inner peripheral step portions 41a formed at both ends.
, A supporting form 44 having a movable form 43 having an outer peripheral step 43a formed at one end and an inner step 43b formed at the other end, and an outer step forming at both ends. 45a
3 with the supporting form 46 having the movable form 45 with
The support formwork is composed of the types. Then, the support molds 42, 44, and 46 are assembled sequentially from below the existing tunnel, and when the last support mold 46 is assembled, the end of the support mold 44 is an inclined surface. Is easy to assemble.

Further, as shown in FIG. 2, when the wrist frame ring 27 is moved forward in the excavation direction with the support form 13 assembled, the space between the inner wall surface 12 of the existing tunnel and the support form 13 is formed. By injecting water and extracting the water when filling the space with concrete from the concrete casting nozzle 32 as shown in FIG. 4, the concrete casting surface can be stabilized.

[0036]

As described in detail in the above embodiment, according to the tunnel lining device of the first aspect of the present invention, a plurality of supporting molds on which a movable mold is movably mounted are mounted on an existing tunnel. Formwork assembling means are arranged on the inner wall surface of the ring form at predetermined intervals, and formwork moving means for moving the movable formwork outward from the support formwork is provided. The wedge frame ring located between them is movably supported by the wedge frame moving means along the longitudinal direction of the existing tunnel, and a pressing member whose outer peripheral surface can contact the end face of the supporting form is pressed by the pressing means to extend the length of the existing tunnel. Concrete laying means for movably supporting along the direction, and laying concrete in the space between the inner wall surface of the existing tunnel and the positioned support formwork from the rear end face of the end frame ring. of In a state in which the movable formwork is moved outward from the plurality of support formworks arranged in a ring shape, concrete is poured into the space between the inner wall surface of the existing tunnel and the support formwork to form a tunnel structure. Thus, the facility cost of the lining can be reduced, while sufficient strength can be secured in the tunnel structure, and the workability of the tunnel lining work can be improved.

According to the tunnel lining method of the second aspect of the present invention, a plurality of support forms which are curved at predetermined intervals on the inner wall surface of the existing tunnel are arranged side by side in a circumferential direction in a ring shape, and the support form is supported. The formwork is connected and fixed to each other, and the movable formwork mounted outside the support formwork is moved outward to press and support the end face of the support formwork along the longitudinal direction of the existing tunnel by a pressing member, The wife frame ring is located between the outer peripheral ring provided along the inner wall surface of the existing tunnel and the support formwork, and in this state concrete is poured into the space between the inner wall surface of the tunnel and the plurality of support formworks. Since the tunnel structure is formed, the lining work is simplified and the workability can be improved, and the equipment to be used can be downsized. Multiple mobile types And Da設 was cured and the concrete becomes possible to configure the tunnel structures, the strength can be sufficiently secured equipment cost is reduced.

Further, according to the supporting form of the present invention, the form outer plate is movably supported by the box form curved along the inner wall surface of the existing tunnel, and the inner form has ribs. Since the movable form which can be moved outward by the lever form outer plate and is buried in the tunnel structure is provided, the box form is used as a positioning member at a predetermined position, and the movable form is used as the tunnel structure. By using as a part of the strength member, an inexpensive tunnel structure having sufficient strength can be easily formed.

According to the tunnel structure of the fourth aspect of the present invention, the movable mold is moved outward from the support mold assembled in a ring shape at predetermined intervals on the inner wall surface of the excavated tunnel. While holding at an almost intermediate position between the inner wall surface of the existing tunnel and the outer peripheral surface of the supporting form, concrete is poured between the inner wall surface of the tunnel and the ring-shaped supporting form, and the movable form is buried, After the concrete was solidified, the supporting form was removed and formed, so this tunnel structure was composed of movable forms arranged side by side in a ring and concrete hardened by casting around the form. While the cost can be reduced, sufficient strength can be ensured.

[Brief description of the drawings]

FIG. 1 is a schematic view of a tunnel lining device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a lining method by the tunnel lining device of the present embodiment.

FIG. 3 is a schematic diagram for explaining a lining method by the tunnel lining device of the present embodiment.

FIG. 4 is a schematic diagram for explaining a lining method by the tunnel lining device of the present embodiment.

FIG. 5 is a schematic diagram for explaining a lining method by the tunnel lining device of the present embodiment.

FIG. 6 is a cross-sectional view of a tunnel structure formed by the tunnel lining method of the present embodiment.

FIG. 7 is a schematic view for explaining a method of holding a movable mold.

FIG. 8 is a schematic diagram for explaining a method of holding a movable mold.

FIG. 9 is a schematic diagram for explaining a method of holding the movable mold.

FIG. 10 is a schematic diagram for explaining a method of holding a movable mold.

FIG. 11 is a cross-sectional view of a tunnel structure formed by a tunnel lining method of another embodiment.

FIG. 12 is a schematic view of a general shield excavator.

FIG. 13 is a schematic view of an automatic segment assembling apparatus.

FIG. 14 is a schematic diagram illustrating an assembled state of a segment.

FIG. 15 is a schematic view of a tunnel lining method by a direct-strike ECL method.

FIG. 16 is a schematic view of a tunnel lining method by an ECL method using a reinforcing bar.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Tunnel structure 12 Existing tunnel inner wall surface 13, 13A, 13B Support formwork 14 Box formwork 15 Formwork outer plate 16 Moving formwork 17 Concrete 21 Skin plate (peripheral ring) 22 Propulsion jack (pressing means) 24 Pressing ring 25 Wife Frame jack (wife frame moving means) 27 Wife frame ring 31 Concrete pipe 32 Concrete casting nozzle (concrete casting means) 33 Swivel ring 34 Formwork electa (formwork assembling means, formwork moving means) 36 Holding rod

Claims (4)

(57) [Claims] 1. An outer peripheral ring provided along an inner wall surface of an existing tunnel, a plurality of support molds having a movable form mounted movably along a radial direction of the existing tunnel on the outside, Formwork assembling means for arranging the formwork in a ring at predetermined intervals on the inner wall surface of the existing tunnel, and moving the movable formwork outward from the support formwork assembled at a predetermined interval on the inner wall surface of the existing tunnel. Form moving means, a wand frame ring positioned between the outer peripheral ring and the support form, and a wand frame movement for movably supporting the wive frame ring along the longitudinal direction of the existing tunnel. Means, a pressing member capable of contacting the end surface of the supporting form, and a position supporting the pressing form by pressing the supporting form via the pressing member while supporting the pressing member movably along the longitudinal direction of the existing tunnel. Pressing means; Concrete laying means for laying concrete from a rear end surface of the end frame ring into a space between the inner wall surface of the existing tunnel and the positioned supporting formwork. apparatus. 2. With respect to a tunnel having a predetermined sectional shape excavated by an excavator, a plurality of support molds curved at predetermined intervals on the inner wall surface of the existing tunnel are arranged side by side in a circumferential direction in a ring shape. The plurality of support molds are connected and fixed to each other, the movable mold mounted outside the plurality of support molds connected in a ring shape is moved outward, and the end face of the support mold is pressed by a pressing member. Along with pressing and supporting along the longitudinal direction of the existing tunnel, the end frame ring is located between the outer peripheral ring provided along the inner wall surface of the existing tunnel and the support form, and in this state, the inside of the tunnel is A tunnel lining method, wherein concrete is poured into a space between a wall surface and a plurality of supporting molds to form a tunnel structure. 3. A box form having a rectangular shape in a plan view and having side walls connected to four sides of a plane part curved along the inner wall surface of the existing tunnel and having an open outside. A mold outer plate that is movably supported, and a movable mold that has ribs on the inner peripheral surface, is movable outward from the box mold by the mold outer plate, and is embedded in the tunnel structure. A supporting formwork for a tunnel structure, comprising: 4. A movable mold is moved outward from a support mold assembled in a ring shape at predetermined intervals on an inner wall surface of an excavated tunnel to move an inner wall surface of an existing tunnel and an outer peripheral surface of the support mold. In the state of being held at a position substantially in the middle of the above, concrete is poured between the inner wall surface of the tunnel and the ring-shaped support form to bury the movable form, and after the concrete is solidified, the support form is formed. A tunnel structure formed by removing the above.