JP2963368B2 - Tunnel lining method and formwork device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tunnel lining method and a self-propelled formwork apparatus used for the method.

[0002]

2. Description of the Related Art In a conventional tunnel excavation method, a support work is performed immediately after excavation so as to prevent rock pieces on an excavation wall surface of a ground from collapsing. As one of them, there is a shoring method in which fresh concrete is sprayed on the excavation wall surface and then supported by columns. However, this spraying construction method has environmental health problems such as scattering of concrete.

[0003] In recent years, rapid hardening concrete which is hardened early has been developed, so that it is possible to prevent the collapse of the ground with the lining concrete alone, and a construction method which eliminates the need for support works has been proposed. . In this lining method, the formwork unit mounted on the self-propelled bogie corresponds to the excavation wall of the ground in the tunnel pit, and the gap between the formwork unit and the ground is filled with fresh concrete, and the concrete After the strength is developed, the formwork unit is separated from the lining concrete,
After excavating the face inside the tunnel pit to a predetermined depth, the lining work of the excavated wall surface of the ground is performed again.

[0004]

However, in the above concrete lining method, since the excavator is excavated so that the face becomes a vertical surface, there is a high possibility that rocks and the like will collapse. There is a problem that the removal operation is required and the efficiency of the tunnel excavation operation is reduced. In order to solve this, there is an excavation method in which a portion called a mini bench is formed in the middle stage of the face, but this method has a problem that it is troublesome.

A first object of the present invention is to provide a concrete lining method capable of solving the above-mentioned conventional problems and preventing rocks and the like from falling down from the excavation wall surface of the face.

A second object of the present invention is to provide a formwork apparatus capable of performing concrete lining reliably and quickly. A third object of the present invention is to provide a formwork device capable of performing a lining operation more reliably by aligning the face side end of the formwork with the inclined excavation surface of the face.

[0007] A fourth object of the present invention is to provide a formwork apparatus capable of quickly moving a stop portion of a cushion material to an assembling position with respect to an excavation wall surface of a face to improve the efficiency of lining work. It is in.

A fifth object of the present invention is to make it possible to bend a plurality of form frames with jacks and to assemble them at a position suitable for the shape of the excavation wall surface of the ground, and to make the layer thickness of the lining concrete uniform. An object of the present invention is to provide a formwork device capable of improving its strength and reducing material costs.

A sixth object of the present invention is to provide a formwork apparatus which can smoothly bend a cushion material and a sheet following a bending operation of a formwork unit. A seventh object of the present invention is to provide a formwork apparatus capable of stably supporting a formwork unit on an inclined excavation wall of a face.

[0010]

According to the first aspect of the present invention, in order to achieve the first object, a form unit mounted on a self-propelled vehicle corresponds to an excavation wall of a ground in a tunnel pit. , Filling the gap between the formwork unit and the ground with fresh concrete, and after developing the required strength of concrete,
In the tunnel lining method of separating the formwork unit from the lining concrete, excavating the face in the tunnel pit to a predetermined depth, and then lining the excavated wall of the ground again, the excavated wall of the face is moved forward toward the upper end. It has a means of digging on a surface that slopes to

According to the first aspect of the present invention, since the excavation wall surface of the face is excavated so as to have an inclined surface closer to the lower end, rocks and the like from the inclined excavation wall surface can be prevented from falling.

According to a second aspect of the present invention, there is provided a formwork apparatus for use in the tunnel lining method according to the first aspect, wherein the formwork unit is mounted on a self-propelled vehicle. Is configured to be able to be held alone at the assembly position, and the self-propelled carriage is configured to be separable from the formwork unit.

According to the second aspect of the present invention, since the formwork unit is held at the assembly position and the excavation work of the face is performed while the fresh concrete is hardening, the lining work is performed quickly.

According to a third aspect of the present invention, in order to achieve the third object, in the second aspect, the form unit is formed in an inclined shape substantially parallel to the inclined excavation wall surface of the face. According to the third aspect of the present invention, the formwork unit is disposed along the inclined surface of the inclined excavation wall at the assembling position. Can be prevented from collapsing.

According to a fourth aspect of the present invention, in order to achieve the fourth object, in the third aspect, a cushion material is provided on a surface of the form unit, and a cushion is provided between the unit and the cushion material. A jack for pressing the material against the inclined excavation wall surface is provided, and a dam stop portion is formed at an end portion on the face side of the cushion material.

According to the fourth aspect of the present invention, the stop portion of the cushion material is quickly moved to the operation position with respect to the inclined excavation wall surface of the face, thereby improving the efficiency of the lining work. The fifth aspect of the present invention achieves the fifth object by providing the third or fourth aspect.
In, the formwork unit is connected in series by a hinge so that a plurality of formwork frames are substantially semicircular, and each frame is bent between the formwork frames so as to conform to the shape of the excavated wall surface of the ground. And a cushioning material is formed on the surface of the form frame to form a molding surface capable of following the bending of the form frame.

According to the fifth aspect of the present invention, the plurality of form frames can be bent by jacks and assembled at a position suitable for the shape of the excavation wall of the ground, and the layer thickness of the lining concrete can be made uniform. Strength can be improved and material costs can be reduced.

According to a sixth aspect of the present invention, in order to achieve the sixth object, in the fifth aspect, the cushioning material is divided into a plurality of portions, and a sheet forming a molding surface is bonded to the surface of each cushioning material. ing.

According to the sixth aspect of the present invention, the divided cushion member and seat are properly bent following the bending operation of the form unit. That is, in the case of a cushion material formed in a single mat shape, wrinkles are more likely to occur, but in the case of a divided cushion material, bending in the separating direction is appropriately performed. In the case of bending in the compression direction, wedge-shaped wrinkles during bending can be prevented by forming a wedge-shaped space between adjacent cushion members that increases as the distance from the seat increases.

According to a seventh aspect of the present invention, in any one of the third to sixth aspects, the formwork unit is provided with a jack that is pressed against the excavation wall surface of the face to support the formwork unit on the inclined excavation wall surface. I have.

According to the seventh aspect of the present invention, since the inclined form unit is supported by the jack on the inclined excavation wall surface of the cutting face, the inclined form unit can be stably supported at the assembly position. Further, the inclination angle of the formwork unit can be adjusted according to the inclination angle of the inclined excavation wall surface.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG.
A pair of left and right self-propelled caterpillars 14 are provided below the one frame 12 via a mounting frame 13. Although not shown, the frame 12 is provided with a workbench, stairs, a driver's seat box, a fence, and the like. The front side portion of the frame 12 (in FIG. 1, the left side is referred to as front and the right side is referred to as rear) are provided with inclined frames 16 and 17 which are inclined forward toward the top. The inclined frames 16 and 17 are formed in an arch shape as shown in FIG.

The inclined frames 16 and 17 are deployed at a form assembling position where the lining concrete is cast along the shape of the excavated wall surface 18a of the ground 18 in the tunnel 15 mine, and are contracted after the concrete is hardened. As a whole, a semicircular form unit 21 is mounted. This unit 21 will be described below.

On the upper surfaces of the inclined frames 16 and 17, a plurality of (four in this embodiment) first vertical jacks 23 to 23 for supporting the formwork are erected in parallel with each other. Are connected by Although a hydraulic cylinder is used as the jack 23 or a jack described later, various mechanisms for converting the rotational motion of the motor into a reciprocating linear motion may be used. An upper mold frame 24 is horizontally supported on the upper end of the first vertical jack 23. On the upper surfaces of the inclined frames 16 and 17, there is provided a center adjusting jack 25 for moving the first vertical jack 23 in the left-right direction together with the form unit 21 so as to align the center of the form unit 21 with the center of the tunnel 15. It is provided in two places.

At the left and right ends of the upper formwork frame 24, first to third formwork frames 26-28 are provided with hinges 29-28.
31 are connected to each other. Since the following configuration is formed symmetrically with respect to a vertical line passing through the center of the mold frame 24, the configuration on the left will be described, and the configuration on the right will be denoted by the corresponding reference numeral with “′” and the description will be omitted. .
First to third jacks for bending 32 to 34 are connected to the vicinity of hinges 29 to 31 of the form frames 26 to 28, respectively.
Can be bent. Each of the jacks 32 to 34 is provided at three locations in the front-rear direction.

The first and second form frames 26, 2
Reference numeral 7 denotes a first and second left and right jacks 35 and 36 provided between the inclined frames 16 and 17 so that the distance between the ground 7 and the ground 18 can be adjusted. The jacks 35 and 36 are provided at two places in the front-rear direction, respectively. The inclination angle of the first and second left and right jacks 35 and 36 can be adjusted by first and second auxiliary jacks 37 and 38. The third
Second vertical jacks 39 are attached to the form frame 28 at two locations in the front-rear direction.

A jack 40 which can be extended and contracted in the front-rear direction is provided on the inclined surface of the form frames 24, 26, 27 on the face 19 side.
Are provided at a plurality of locations (six in this embodiment), and the form frames 24, 26 to 28 are stably supported at the assembly position by pressing the tip of each jack 40 against the inclined excavation wall surface 19a of the face 19. I do. (See FIG. 8) As shown in FIG. 3, an engagement recess 41 is formed downward on the lower surface of the upper mold frame 24 so as to correspond to the four jacks 23, and the upper end of the lifting body 42 of the jack 23 is formed. Are detachably engaged.

The proximal end of the first bending jack 32 is connected to the form frame 24 by a hinge 43, and the other end is connected to the first form frame 26 by a hinge 44. When the jack 32 is expanded and contracted, the form frame 24
In contrast, the first form frame 26 is tilted up and down around the hinge 29, and the form frame 26 is adjusted so as to follow the shape of the ground 18. Both the second and third bending jacks 33 and 34 have hinges 4 at both ends between the form frames 26 and 27 and between the frame frames 27 and 27 similarly to the first bending jack 32.
3,44.

As shown in FIG. 4, the first left-right direction jack 35 mounted on the inclined frames 16 and 17 is
The main body 46 is connected to the main body 7 via a hinge 45 so as to be tiltable in the vertical direction, a support rod 47 provided to be extendable with respect to the main body 46, and an engaging projection 48 connected to the rod 47. ing. An engaging concave portion 49 is formed on the inner side of the lower portion of the first mold frame 26.
Are releasably engaged. The first auxiliary jack 37 has a base end connected to the inclined frames 16 and 17 by a hinge 50 so as to be tiltable in a vertical plane, a first auxiliary jack 37 is connected to the main body 51 so as to be extendable and contractable, and is connected to the main body 46. And an operating rod 53 connected by a hinge 52. Then, the vertical inclination angle of the first left-right jack 35 can be adjusted in a state where the engaging projection 48 is disengaged from the engaging recess 49.

The second lateral jack 36 and the second
The configuration of the auxiliary jack 38 is also the same as the configuration of the first left-right jack 35 and the first auxiliary jack 37, and a description thereof will be omitted.

As shown in FIG. 2, the form frames 24, 26
28 are formed in an arc shape substantially the same as the arc shape of the excavated wall surface 18a of the ground 18, and a large number of guide rails 61 are formed on the arc surface in parallel with each other in the tunnel direction as shown in FIG. Fixed. A steel support plate 62 is supported on each of the two adjacent guide rails 61, and a resin cushion material 63 is attached to the upper surface of each support plate 62 by an adhesive or the like. A resin or rubber sheet 64 is adhered to the surface of each cushion member 63 with an adhesive.

As shown in FIG.
Jacks 65 are provided in the front and rear directions corresponding to the respective support plates 62 inside the insides 4, 26 to 28, and the main body 66 is connected to the frames 24, 26 to 28 by hinges 67. The distal end is connected to a bracket 69 welded to the lower surface of each support plate 62 by a hinge 70. The support plate 62, the cushion material 63 and the jacks 65 are provided, for example, forty or more.

As shown in FIG. 6, the cushion member 63 and the seat 64 protrude from the front end of the guide rail 61, and this protruding portion constitutes a stop portion 63a. And
When the movable rods 68 of the jacks 65 are moved forward in FIG.
3 and the sheet 64 are reciprocated in the same direction. For this reason,
The wife stop portion 63a of the cushion member 63 is deformed and adhered to follow the irregular shape of the excavated surface 19a of the face 19, thereby preventing the fresh concrete from leaking.

As shown in FIG. 1 and FIG.
Is provided with a supply nozzle 71 for filling fresh concrete between the outer peripheral surface of the form unit 21 and the ground 18.

Next, a method for excavating the inside of the tunnel 15 using the self-propelled formwork apparatus configured as described above will be described. FIGS. 1 and 2 show the existing concrete 20 already poured into the ground 18 in the tunnel 15 mine.
A prevents rocks and the like from falling from the ground 18 and prevents excavators (not shown) from excavating a face 19 in the tunnel pit on an inclined wall surface 19a which is closer to the front. Also, the form unit 21 of the self-propelled carriage 11 is mounted on the excavation wall 18 of the ground 18.
It is arranged with a predetermined gap from a. Further, the cushion material 63 is moved to the face 19 side by the jack 65, and the wife stopper 63a is moved to the inclined excavated wall surface 19 of the face 19.
It is elastically deformed and closely adhered to follow a. The plurality of jacks 40 are in contact with the inclined excavation wall surface 19a,
The inclined frames 16, 17 and the form unit 21 are stably supported by using the wall surface 19a. By adjusting the extension amount of each jack 40, the inclined excavation wall surface 19 can be adjusted.
It is also possible to adjust the inclination angle of the formwork unit 21 according to the inclination angle of a. In this case, the form unit 2
The self-propelled trolley 11 also tilts by the tilt of 1.

In this state, a supply hose of a concrete pump truck (not shown) is connected to the supply nozzle 71, and a gap between the excavated wall surface 18a of the ground and the sheet 64 is filled with fresh concrete 20B in which a rapidly hardened material is injected and stirred. I do. The concrete hardens in about 10 to 15 minutes and develops the required strength.

During or after the hardening of the fresh concrete 20B, the lift 4 of the first vertical jack 23
2 is separated from the engaging recess 41 of the form frame 24, and the engaging projections 48 of the first and second left and right jacks 35 and 36 are separated from the engaging recess 49. In this state, each of the form frames 24 and 26 constituting the form unit 21 is formed.
To 28, 26 'to 28' are stably held at the assembly position by the first to third bending jacks 32 to 34, 32 'to 34' and the second vertical jacks 39, 39 '.

After the self-propelled trolley 11 is separated from the formwork unit 21, an excavator (not shown) is moved toward the face 19, and the excavator displaces the face 19 upwardly toward the inclined excavating wall surface 19a. Drilling. In this excavation operation, since the formwork unit 21 is in the assembling position, the corresponding face 19 is not excavated. This excavation work has a predetermined depth, that is, the width of the inclined form unit 21 (for example, 2.5
m), the excavator is retracted, the self-propelled trolley 11 is moved to a position corresponding to the form unit 21, and the elevating body 42 of each jack 23 is moved to the upper form frame 24. The jack 3 is engaged with the engagement recess 41.
The self-propelled trolley 11 is combined with the formwork unit 21 by engaging the engagement protrusions 48 of the 5, 36 with the engagement recesses 49.

Next, the second vertical jack 39 is raised from the road surface, the third bending frame 34 is used to rotate the third mold frame 28 in the counterclockwise direction about the hinge 31 and each jack is rotated. 23, 32-36, 32 '
-36 'and the like are actuated in the retracting direction to separate the form unit 21 from the hardened existing concrete 20A.

Here, after excavating the outer peripheral unexcavated portion of the inclined excavated wall surface 19a of the face 19 to the same depth as the excavated wall surface by the excavator, it corresponds to the newly excavated wall surface 18a of the ground 18. Self-propelled bogie 1 with form unit 21 in position
Move by one. And each jack 23,32-3
6, 32 'to 36' are operated in the extension direction to deploy and hold the formwork unit 21 at an assembly position where concrete can be cast as shown in FIGS. Thereafter, the fresh concrete 20B is again filled from the supply nozzle 71 into the gap between the formwork unit 21 and the ground 18 and hardened, and new concrete lining is performed.

In the above-mentioned lining method, the face 19 is excavated during the curing of the fresh concrete 20B to improve the work efficiency. However, instead of this, the concrete 20B hardens and develops the necessary strength. After removing the form unit 21, the inclined excavation wall surface 19a of the face 19 is removed.
Excavation work may be performed all at once.

In the embodiment of the present invention, the ground 18
After the concrete lining is performed on the excavation wall surface 18a, the excavation machine is used to excavate the excavation wall surface 19a of the face 19 in an inclined shape such that the excavation wall surface 19a is displaced forward toward the upper side.
The rock 9a can be prevented from collapsing.

In the above embodiment, the form unit 21
Has an inclined structure along the vicinity of the outer periphery of the inclined excavation wall surface 19a.
The entire surface 8a can be covered with concrete, so that rocks and the like from the excavation wall surface 18a can be prevented from falling down when excavating the new inclined excavation wall surface 19a.

In the above embodiment, a number of guide rails 61 are laid on the form frames 24, 26 to 28, 26 'to 28' of the form unit 21, and a support plate 62, a cushion material and 63 and sheet 64
Is supported by a number of jacks 65 so as to be able to reciprocate in the front-rear direction, and a stop member 63 a is integrally formed at the front end of the cushion material 63. For this reason, unlike the conventional airbag-type fastening member, the number of components can be reduced, and the fastening operation can be performed quickly and reliably.

Further, in the above embodiment, each of the form frames 26 to 28 and 26 'to 28'
2 to 34, 32 'to 34', and a cushion member 63 and a sheet 64 are mounted on the surface of each frame so as to follow the bending operation. Therefore, as shown in FIG. It is possible to adjust the posture by bending 21 so as to follow the excavation shape of the ground 18,
By making the layer thickness of the lining concrete uniform, its strength can be improved and the material cost can be reduced.

Further, in the above embodiment, the form unit 2
After filling the gap between the outer peripheral surface 1 and the excavated wall surface 18a of the ground 18 with fresh concrete 20B, the form unit 21 was left as it was and only the self-propelled trolley 11 was evacuated. For this reason, the excavation work of the wall surface 19a of the face 19 can be performed during the hardening of the fresh concrete 20B, and the efficiency of the lining work can be improved.

The present invention is not limited to the above embodiment, but can be embodied as follows. (1) A wedge-shaped space is formed between the cushion members 63 so as to increase as the distance from the seat 64 increases. In this case, it is possible to prevent the cushion material 63 from being pressed at the time of the bending operation of the form unit 21 to cause the sheet 64 to wrinkle.

(2) In the above embodiment, the self-propelled carriage 11 is formed so as to be separable from the form unit 21. However, the self-propelled carriage 11 is not separable. (3) Although the inclined form unit 21 is used in the above embodiment, the form unit is not inclined.

(4) In the above-described embodiment, a jack composed of a hydraulic cylinder is used. Instead of this, a mechanism (not shown) for converting a rotary motion of a motor or the like into a linear reciprocating motion is used.

(5) Although the cushion member 63 and the seat 64 are used in the above embodiment, both members are omitted. In this case, each frame 24, 26 to
The surfaces of 28, 26 'to 28' are molding surfaces of concrete. Further, only the sheet 64 is used. In these cases, a separate stop portion is provided.

The technical ideas other than the claims that can be grasped from the above embodiment will be described below together with their effects. (1) In claim 2, the formwork frames 24, 26 to 2
8, 26 'to 28' are hinges 29 to 31, 29 'to 31
', And each connecting portion has a jack 32 for bending.
And the lowermost form frames 28, 28 'are supported on the traveling road surface of the tunnel by vertical jacks 39, 39'.
Is a formwork device for tunnel lining that is held alone in the assembly position.

In the case of this device, the configuration of the form unit 21 can be simplified, and the bending operation can be performed quickly. (2) In claim 2, the configuration in which the traveling vehicle 11 is detached from the form unit 21 includes the form frames 24, 26-
Engaging recesses 41, 49 provided on the side of 28, 26 'to 28'
And jacks 23, 32 to 3 provided on the traveling cart 11 side
4. A formwork device for tunnel lining, comprising the lifting and lowering members 42 and the engaging projections 48 of 32 'to 34'.

In the case of this device, the structure for separating or combining the traveling carriage 11 from the form unit 21 is simplified. (3) In claim 6, the form frames 26 to 28, 2
A tunnel lining form device in which a wedge-shaped gap is formed between the cushion portions corresponding to the bent portions of 6 'to 28' and becomes larger as the distance from the seat increases.

In the case of this apparatus, the form frames 26 to 2
It is possible to prevent wrinkles from being generated in the sheet 64 at the time of the bending operation of 8, 26 'to 28', and to improve the accuracy of the concrete molding surface.

In this specification, the form unit 2
1 includes various structures that can be bent, expanded, contracted, separated or united so as to conform to the shape of the ground 18 and can be deployed at the assembly position.

[0056]

As described above in detail, the present invention has the following effects by the structure described in the claims.

According to the first aspect of the present invention, it is possible to prevent rocks and the like from falling from the excavation wall surface of the face. The invention described in claim 2 provides the effect of the invention described in claim 1,
Concrete lining can be performed reliably and quickly.

According to the third aspect of the present invention, in addition to the effect of the second aspect, the lining work can be performed more reliably by aligning the face end of the formwork with the inclined excavation surface of the face. it can.
According to the invention of claim 4, in addition to the effect of the invention of claim 3, the end stop portion of the cushion material is quickly moved to the assembling position with respect to the excavation wall surface of the face, thereby improving the efficiency of the lining work. be able to.

According to a fifth aspect of the present invention, in addition to the effects of the third or fourth aspect, a cushion material is provided on the surface of a plurality of form frames, and the form frames and the cushion materials are bent by jacks. It can be assembled at a position suitable for the shape of the excavated wall surface of the ground, the layer thickness of the lining concrete can be made uniform, its strength can be improved, and material costs can be reduced.

According to the sixth aspect of the invention, in addition to the effects of the fifth aspect, the divided cushioning material and sheet are properly bent without wrinkling following the bending operation of the form unit. The molding surface of concrete can be molded with high precision.

According to the invention of claim 7, in addition to the effect of the invention of any of claims 3 to 6, the form unit can be stably supported on the inclined excavation wall surface of the cutting face, and the slope can be inclined. The inclination angle of the formwork unit can be appropriately adjusted according to the inclination angle of the excavation wall surface.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a tunnel lining method.

FIG. 2 is a cross-sectional view showing a tunnel lining method.

FIG. 3 is an enlarged front view of the vicinity of a first vertical jack.

FIG. 4 is an enlarged front view near a first left-right jack.

FIG. 5 is a partially enlarged cross-sectional view near a cushion material.

FIG. 6 is a longitudinal sectional view showing the vicinity of a jack for moving a cushion material.

FIG. 7 is a front view showing a bent state of the form unit.

FIG. 8 is an enlarged front view of the jack.

[Explanation of symbols]

11: Self-propelled trolley, 16, 17: Inclined frame, 18: Ground mountain, 1
9 ... face, 19a ... inclined excavation wall surface, 21 ... form unit, 23 ... first vertical jack, 24 ... upper form frame, 26-28 ... first to third form frames, 29-
31 hinges, 32-34 first to third bending jacks, 35, 36 first and second left and right jacks, 3
9: second vertical jack, 61: guide rail, 63
... Cushion material, 63a ... Wife stopper, 64 ... Seat, 6
5. Jack.

Continued on the front page (72) Inventor Sumio Uematsu 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Inside the Kumagaya Gumi Tokyo Head Office (72) Inventor Akio Shiseki 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Mitsumasa Okamura 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor: Yukihisa Inagawa, 144, Shinjo, Masamasa, Motosu-gun, Gifu Gifu Kogyo Co., Ltd. 56) References JP-A-3-208996 (JP, A) JP-A-8-338198 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E21D 11/10

Claims (7)

(57) [Claims] 1. A method according to claim 1, wherein a form unit mounted on the self-propelled bogie corresponds to an excavation wall of the ground in the tunnel pit, and a gap between the form unit and the ground is filled with fresh concrete, and the required strength of concrete is obtained. After the manifestation, the formwork unit is separated from the lining concrete, and the tunnel lining method of digging the face in the tunnel pit to a predetermined depth and then lining the excavation wall of the ground is performed again. A tunnel lining method characterized by excavating on a surface that is inclined forward in a portion. 2. A formwork device used in the tunnel lining method according to claim 1, wherein the formwork unit mounted on the self-propelled carriage is configured to be able to be independently held at an assembling position. Is a formwork device for tunnel lining that can be separated from the formwork unit. 3. The formwork device for tunnel lining according to claim 2, wherein the formwork unit is formed in an inclined shape substantially parallel to the inclined excavation wall surface of the face. 4. A cushioning material is provided on a surface of the form unit according to claim 3, and a jack is provided between the unit and the cushioning material to press the cushioning material against the inclined excavation wall surface. A formwork device for tunnel lining in which a dam stop is formed at an end of the cushion material on the face side. 5. The formwork unit according to claim 3, wherein the plurality of formwork frames are connected in series by hinges such that the plurality of formwork frames have a substantially semicircular arc shape. A jack is provided to bend each frame so as to conform to the shape of the frame, and a cushioning material is formed on the surface of the form frame to form a molding surface capable of following the bending of the form frame. Formwork equipment. 6. The formwork device for tunnel lining according to claim 5, wherein the cushioning material is divided into a plurality of pieces, and a sheet forming a molding surface is adhered to a surface of each cushioning material. 7. The mold for tunnel lining according to claim 3, wherein the formwork unit is provided with a jack pressed against the excavation wall surface of the face to support the formwork unit on the inclined excavation wall surface. Frame device.