JP7182331B2 - Support frame stand for support frame of concrete formwork device, method for stacking support frame of concrete formwork device, and method for constructing concrete formwork device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete formwork apparatus for molding concrete for tunnel lining. In particular, the present invention, in the concrete formwork apparatus, provides a support frame stand for a support frame for supporting a face plate for molding lining concrete, a method for stacking the support frames of the concrete formwork apparatus, and a method for constructing the concrete formwork apparatus. It is about.

Patent Literature 1 discloses this type of concrete formwork device.
In such a concrete formwork apparatus, a large number of disassembled parts are loaded from a factory or the like onto the bed of a truck and transported to a tunnel construction site. The parts are then assembled in a tunnel.

1 and 2 show a concrete formwork device 11. FIG. The support frame 15 of the concrete formwork device 11 supports a face plate 21 for forming the lining concrete C. As shown in FIG. When the support frame 15 is transported from the factory into the tunnel TN, if the support frame 15 is transported in a laid down state by truck, the support frame 15 may be too large and protrude from the bed L of the truck TR. For this reason, conventionally, when the support frame 15 is transported, the support frame 15 is not assembled, and a large number of disassembled parts constituting the support frame 15 are bound and transported on the loading platform L of the truck TR. .

JP 2014-5719 A

That is, as described above, conventionally, it is necessary to assemble the support frame 15 by assembling the parts of the support frame 15 on the ground S at the construction site of the tunnel TN. In this case, since the support frame 15 supports the face plate 21 forming the entire inner peripheral surface of the lining concrete C, it is large as described above, and the number of parts is large. Moreover, at least about five support frames 15 are used for one concrete formwork apparatus 11 . Therefore, when assembling in the tunnel TN, an area for temporarily placing and arranging many parts is required on the ground, and a crane is also used for the assembling. As a result, a large assembly space is occupied in the tunnel TN. On the other hand, since no extra space is secured in the tunnel TN, during the assembly of the support frame 15, a large space is occupied for the assembly of the support frame 15, as described above, and the vehicle of the truck is occupied. Inability to move or perform other tasks. As a result, the construction period for tunnel construction is lengthened.

In the support frame stand for the support frame of the concrete formwork apparatus of the present invention, the bottom surface of the support frame for supporting the face plate for concrete molding in the concrete formwork apparatus used for placing lining concrete for tunnels. and an upper side portion extending from one end of the base portion and detachably fixed to the side surface of the support frame at the tip portion.

In the above configuration, the support frame can be held in an upright state by fixing the bottom part of the support frame stand to the bottom surface of the support frame and fixing the upper part to the side surface of the support frame. Therefore, the projected area of the support frame is smaller than when the support frame is laid down. Therefore, it can be transported by a truck without disassembling the support frame as described above. Therefore, at the tunnel construction site, it is sufficient if there is a space for assembling the legs on the support frame. Therefore, in the tunnel, movement of trucks and other work are hardly hindered, and the construction period for tunnel construction can be shortened.

In the method of laminating support frames for a concrete formwork apparatus according to the present invention, in a concrete formwork apparatus used for placing lining concrete for a tunnel, the support frame for supporting the face plate for concrete molding is provided as the support frame stand. The support frame unit is constructed by stacking the support frames in an aligned state and connecting the support frames together.

According to the stacking method described above, since the support frames of the support frame unit can be stacked in an aligned state and erected, the projected area of the support frame unit is smaller than when the support frames are laid down, resulting in a compact structure. become a state. Therefore, the support frame can be easily transported by a truck without being disassembled. At the tunnel construction site, there is no need to temporarily place or assemble small parts, and it is only necessary to have a space for erecting the support frame and assembling the legs on the support frame. Therefore, it suffices to occupy a narrow space in the tunnel for a short period of time. Therefore, the movement of trucks and other work in the tunnel are hardly hindered, and the construction period for tunnel construction can be shortened.

In the method for constructing a concrete formwork apparatus according to the present invention, in a concrete formwork apparatus used for placing lining concrete for a tunnel, a support frame for supporting a face plate for molding concrete is placed in an upright state by the support frame stand. The support frames are stacked in an aligned state, the support frames are connected to form a support frame unit, the support frame unit is temporarily placed at the construction site of the tunnel, and then the support The supporting frame of the frame unit is constructed sequentially as a concrete formwork device.

According to the construction method described above, as described above, transportation by truck is facilitated, and the individual constituent members of the disassembled support frame are unloaded at the construction site of the tunnel, arranged side by side, and supported on the spot. There is no need to carry out complicated assembling work of the frame. Therefore, the time required to occupy the ground in the tunnel for assembling the support frame can be greatly shortened. Therefore, the construction period for tunnel construction can be shortened.

ADVANTAGE OF THE INVENTION This invention has the effect of being able to shorten the work period of tunnel construction.

A simplified cross-sectional view showing a usage state of a concrete formwork device. A simplified side view of a concrete formwork device. A simplified side view showing a support frame and top framing members. A simplified side view showing the support frame and the top frame member before the additional member is moved. FIG. 3 is an exploded front view of the support frame; The perspective view of a support frame. FIG. 4 is a perspective view of a state in which a support frame unit in which support frames are stacked is loaded on the bed of a truck; The perspective view of a support frame unit. The perspective view of a support frame stand. The perspective view of the support frame unit of a support frame stand part. FIG. 4 is a side cross-sectional view of the support frame unit of the support frame stand portion; The perspective view of the support frame unit of an auxiliary|assistant leg part. FIG. 4 is a side cross-sectional view of the support frame unit of the auxiliary leg portion; The perspective view of a 2nd connection spacer part. (a) is a perspective view of an auxiliary leg, (b) is a perspective view of a first connecting spacer, (c) is a perspective view of a second connecting spacer, (d) is a ) is a perspective view seen from a different direction. Sectional drawing of the support frame unit which shows the example of a change. FIG. 11 is a partial cross-sectional view of the lower portion of the support frame showing a modified example; Half sectional view showing another modification. Half sectional view showing still another modification.

<Concrete formwork device 11>
First, the configurations of the concrete formwork device 11 and the support frame 15 will be schematically described mainly with reference to FIGS. 1 to 6. FIG.

As shown in FIGS. 1 and 2, on a pair of parallel rails R on the ground S of the tunnel TN, a concrete formwork device (hereinafter referred to as a formwork device) 11 used for placing the lining concrete C is placed. It is movably supported along the extension direction of the tunnel TN.

As shown in FIGS. 1, 3 and 4, a plurality of support frames 13 are fixed on the base frame 12 of the formwork device 11 along the extension direction of the tunnel TN at intervals.
As shown in FIGS. 1 and 5 , the support frame 13 includes a pair of left and right leg members 14 and a support frame 15 positioned on the leg members 14 . As shown in FIGS. 5 and 6, the support frame 15 includes beams 16 on the leg members 14 and a plurality of posts 17 erected and fixed on the beams 16 along the extending direction of the beams 16 . , and an arcuate top frame member 18 that is installed and fixed between the upper ends of the pillars 17 .

As shown in FIG. 1, in the assembled state of the support frame 13, downwardly extending side frame members 19 are connected and fixed to both ends of the top frame member 18, and the lower ends of the side frame members 19 are connected and fixed. A lower frame member 20 is connected and fixed. These side frame members 19 and lower frame members 20 are supported by the support frame 13 via members (not shown). As shown in FIGS. 1 and 2, a plurality of face plates 21 for concrete molding are stretched and fixed between the outer peripheral surfaces of the frame members 18, 19 and 20. As shown in FIG.

Then, as shown in FIG. 1 , the lining concrete C is placed between the inner wall of the tunnel TN and the face plate 21 , and the inner surface of the lining concrete C is formed by the face plate 21 .
As shown in FIGS. 5 and 6 , the left and right leg members 14 are fixed to the lower surfaces of the beam members 16 of the support frame 15 . An auxiliary member 24 sandwiched between the leg members 14 is fixed to the lower surface of the beam member 16 .

<Lamination Method of Support Frame 15 and Structure of Support Frame Stand 41>
Next, an embodiment of a stacking method of the support frame 15 of the concrete formwork apparatus 11 and the support frame stand 41 embodying the present invention will be described. 8 to 15 and the like, dashed lines indicate the positions of bolts and nuts (hereinafter referred to as bolts and nuts) 42. As shown in FIG.

As is clear from FIGS. 7 and 8, when the support frame 15 is loaded on the loading platform L of the truck TR and transported, the support frame 15 is unitized as follows.
As shown in FIGS. 7 and 8, a plurality of support frames 15 stacked in parallel and aligned are supported in an inclined state by a pair of support frame stands 41 to form a support frame unit 36. The support frame stand 41 is placed on the loading platform L of the truck TR at a bottom portion 41a, which will be described later. In this case, the lower end of each support frame 15 is close to the floor surface of the loading platform L of the truck TR. The support frame stand 41 is fixed to the lowermost support frame 15 in the tilt direction.

As shown in FIGS. 9 to 11, the support frame stand 41 has a corner formed at an acute angle (40 to 80 degrees) by a bottom portion 41a and an inclined top portion 41b extending from one end of the bottom portion 41a. degree). A support portion 41c whose tip side is directed upward is formed at the tip portion of the bottom portion 41a. The beam member 16 of the support frame 15 is supported on the upper surface of the support portion 41c. Insertion holes 35 through which the bolts of the bolts and nuts 42 are inserted are formed at both ends of the support frame stand 41, that is, at the ends of the bottom side portion 41a and the top side portion 41b. 8 and 11, the bottom portion 41a of the support frame stand 41 is attached to the hole 37 of the bottom surface (lower surface) of the beam member 16 of the support frame 15 in the hole 35 of the support portion 41c by bolts and nuts 42. is detachably fixed by Further, the tip of the upper side portion 41b of the support frame stand 41 is detachably fixed to the hole 37 of the mounting portion 17a on the side surface of the column 17 by means of a bolt/nut 42 in the hole 35. As shown in FIG.

As shown in FIG. 7, the positional relationship between the bottom side portion 41a and the upper side portion 41b is set so that the support frame 15 supported by the support frame stand 41 is maintained in an inclined upright state. . That is, in a state in which the support frame stand 41 is placed on the bed L of the truck TR at the bottom portion 41a, the inclination angle of the support frame 15 is determined by the positional relationship between the bottom portion 41a and the top portion 41b of the support frame 15. be.

As shown in FIGS. 8, 12, 13 and 15A, auxiliary legs 43 are attached to both end surfaces 24a of the auxiliary member 24 in each support frame 15 of the support frame unit 36. As shown in FIG. A mounting plate 43b is provided at the lower end of the main body portion 43a of the auxiliary leg 43. As shown in FIG. The body portion 43a is formed with a circular center hole 44 and an elongated hole 45 extending in an arc around the center hole 44. As shown in FIG. Then, the bolt of the bolt/nut 42 is inserted through the center hole 44, the elongated hole 45 and the hole 25 of the auxiliary member 24, and the nut is screwed onto the bolt. At this time, the auxiliary leg 43 is rotatable about the bolt of the center hole 44 within the range of the arc length of the long hole 45 in the plane along the tilt direction of the support frame 15 .

As shown in FIGS. 8, 14 and 15(b), (c), and (d), the support frame 15 of the support frame unit 36 has a first connecting spacer 46 attached to the post 17 thereof. A second connection spacer 47 is attached to the beam member 16 of the support frame unit 36 . Adjacent first and second connecting spacers 46 and 47 are also connected to each other. The first and second connecting spacers 46 and 47 maintain the inclination angle of each support frame 15 and maintain the mutual spacing between the support frames 15 so that the adjacent support frames 15 are separated from each other. The support frame stand 41 and the first and second connection spacers 46 and 47 constitute a support unit.

The first connecting spacer 46 shown in FIGS. 8 and 15(b) has connecting portions 46a formed at both ends thereof. The distance between the connecting portions 46 a is longer than the thickness of the support frame 15 . The first connecting spacer 46 is formed with a central hole 44 and an arcuate long hole 45 centering on the central hole 44 . A plurality of elongated holes 46c are formed in the connecting portion 46a. Then, the first connecting spacer 46 is attached to the central portion of the supporting frame 15 in the longitudinal direction by means of bolts and nuts 42 having bolts passing through the center hole 44, the long hole 46c, and the holes (not shown) of the struts 17. It is attached. Further, the first connecting spacer 46 is rotatable within the length of the elongated hole 45 with the bolt of the central hole 44 as the central axis within the plane along the tilt direction of the support frame 15 (vertical plane). The connecting portion 46a is joined to the connecting portion 46a of another adjacent first connecting spacer 46 and fixed by the bolt/nut 42 at the portion of the long hole 46c. Therefore, the space between the support frames 15 is maintained in the spaced state.

The second connecting spacer 47 shown in FIGS. 8, 14 and 15(c) and (d) comprises a lower side member 47a and an upper side member 47b. The lower side member 47a has an installation plate 47c at its lower portion and connecting portions 47d at both ends. The distance between the connecting portions 47d is longer than the thickness of the support frame 15. As shown in FIG. A plurality of insertion holes 48 are formed in the lower member 47a. An insertion hole 47e is formed in the connecting portion 47d. A mounting member 51 is fixed to the upper end of the upper side member 47b, and a plurality of insertion holes 52 are formed in the mounting member 51. As shown in FIG. The upper member 47b is rotatably connected to the lower member 47a by a shaft 49. As shown in FIG. An arcuate long hole 50 extending around the shaft 49 is formed in the upper member 47b. The long hole 50 faces the insertion hole 48 of the lower member 47a. A bolt of the bolt/nut 42 is inserted through the elongated hole 50 and one insertion hole 48 .

The lower member 47 a and the upper member 47 b are rotatable about the shaft 49 within the length of the long hole 50 , and the attachment member 51 of the upper member 47 b is attached to the beam 16 . It is attached to the lower surface by a bolt/nut 42 at the portion of the insertion hole 52 . Also, the connecting portions 47d of the adjacent lower side members 47a are connected to each other by the bolts and nuts 42 at the insertion holes 47e. Therefore, the space between the support frames 15 is maintained in this portion as well.

Then, as shown in FIGS. 8 and 9, the four support frames 15 having the additional material 18a and the one support frame 15 having no additional material 18a are placed on the loading platform L of the truck TR and placed on the support frame stand 41. to stack in alignment and at an angle. The increase member 18a is fixed to the top frame member 18 using a connecting fitting (not shown). The support frame 15 without the reinforcing material 18a is positioned at the lower end in the tilt direction.

For the stacking procedure of the support frame 15, for example, a pair of support frame stands 41 are attached to one support frame 15 to which the auxiliary leg 43 and the first and second connection spacers 46 and 47 are attached, and the support frame stand 41 is holds the support frame 15 in a tilted state from below in the tilt direction. Another support frame 15 having an auxiliary leg 43 and first and second connecting spacers 46 and 47 attached thereto is aligned and stacked in parallel on the support frame 15 . Then, the connecting portions 46a and 47d of the adjacent first and second connecting spacers 46 and 47 are connected. At this time, by tightening the bolts and nuts 42, the first and second connecting spacers 46 and 47 are fixed to the support frame 15 in the inclined state. Further, the auxiliary leg 43 is fixed to the support frame 15 by tightening the bolt/nut 42 at an angle in which the mounting plate 43b of the auxiliary leg 43 is along the loading platform L of the truck TR.

In this manner, the support frames 15 are sequentially stacked.
By doing so, as shown in FIGS. 7 and 8, a plurality of support frames 15 are connected and arranged in parallel, and stacked and fixed in a parallel alignment state with a space therebetween and in an inclined state. A support frame unit 36 shown in FIGS. 8 and 9 is constructed. The bottom portion 41 a of the support frame stand 41 , the auxiliary leg 43 and the lower side member 47 a of the second connecting spacer 47 form the legs of the support frame unit 36 .

<Method for transporting support frame unit 36, method for constructing and dismantling formwork device 11>
This support frame unit 36 is loaded and installed on the loading platform L of the truck TR. The support frame unit 36 is tied to the bed L of the truck TR by a wire (not shown) and transported in this state.

The truck TR loaded with the support frame unit 36 enters the construction site inside the tunnel TN. Then, the support frame unit 36 is unpacked, and the support frames 15 are separated in order from the upper one while releasing the connection between the first and second connection spacers 46 and 47 . The separated support frame 15 is lowered onto the ground S in the work area set adjacent to the planned placing position of the formwork device 11 . The support frame stand 41 is lowered to the ground S after the bolts and nuts 42 at both ends thereof are removed.

The support frame 15 lowered to the ground S in the work area is again tilted as shown in FIG. be done. Alternatively, the support frame 15 may be laid sideways without being tilted, and may be temporarily placed by being connected to each other using the first and second connection spacers 46 and 47 so as not to collapse.

Next, the first and second connecting spacers 46 and 47 are separated one by one from the superimposed support frame 15 , and the auxiliary legs 43 and the first and second connecting spacers are separated from the supporting frame 15 . Spacers 46, 47 are removed.

As shown in FIGS. 1 and 5 , leg members 14 are fixed to both lower end portions of a support frame 15 to form a support base 13 . Thereafter, as shown in FIG. 3, each support cradle 13 having a support frame 15 is sequentially assembled onto the base frame 12 of the formwork device 11 that has been installed in advance. Various members (not shown) are assembled on the support frame 13, and the side frame member 19 and the lower frame member 20 are supported by the support frame 13. As shown in FIG. As shown in FIG. 4, the additional member 18a extends in the direction of extension of the tunnel TN on the support frame 13 with the connection metal fittings removed, and on a horizontal member (not shown) that constitutes a part of the concrete formwork device 11. ).

Then, as shown in FIGS. 1 and 2, a face plate 21 is attached onto the top frame member 18, the side frame members 19 and the lower frame member 20. As shown in FIG. Thus, the construction of the formwork device 11 is completed. After that, lining concrete C is placed between the inner peripheral surface of the tunnel TN and the formwork device 11 .

The dismantling of the formwork device 11 is carried out in the reverse order of the construction procedure.
(Effect of Embodiment)
Therefore, the present embodiment has the following effects.

(1) The support frame unit 36 composed of the support frame 15 in an inclined state has a small projected area on the loading platform L of the truck TR. Therefore, the support frame unit 36 can be placed on the loading platform L of the truck TR and easily transported. Therefore, it is not necessary to disassemble the support frame 15 into individual constituent members, and handling such as loading and unloading of the support frame 15 is facilitated.

(2) At the construction site of the tunnel TN, unlike the conventional art, the individual constituent members of the support frame 15 in disassembled state are lowered to the construction site of the tunnel TN, arranged side by side, and then the support frame 15 is installed on the spot. There is no need to perform complicated assembly work. Therefore, the time required to occupy the ground S in the tunnel TN for assembly of the support frame 15 can be greatly shortened. Therefore, it is possible to lengthen the time for vehicles such as trucks TR to pass through the tunnel TN, and to lengthen the time required to handle the constituent members of the formwork device 11 other than the support frame 15 . Therefore, it is possible to shorten the construction period for constructing the formwork device 11 in the construction of the tunnel TN. Since the dismantling of the formwork device 11 is executed in the reverse order of the construction, the work period for dismantling can be shortened.

(3) As the support frame stand 41, by varying the length ratio between the bottom side portion 41a and the top side portion 41b and the angle between the bottom side portion 41a and the top side portion 41b, the bottom side portion 41a and the top side portion 41b A plurality of types with different positional relationships are prepared. That is, a plurality of types of support frame stands 41 for tilting the support frame 15 at different angles are prepared. In this way, a plurality of inclination angles of the support frame 15 of the support frame unit 36 can be selected according to the width of the loading platform L of the truck TR and the size of the support frame 15 . At this time, the auxiliary leg 43, the first connecting spacer 46, and the lower side member 47a of the second connecting spacer 47 can be rotated to accommodate the difference in the tilt angle of the support frame 15. FIG.

(4) Since the first and second connecting spacers 46 and 47 can keep the space between the adjacent supporting frames 15 of the supporting frame unit 36 in a connected state, the supporting frames 15 may be damaged by rubbing against each other. 15 damage can be prevented.

(5) Since the support frame stand 41 and the auxiliary legs 43 constitute the legs of the support frame unit 36, the support frame 15 in the upright state can be prevented from being damaged due to contact with the bed L of the truck TR.

(Change example)
The present invention is not limited to the above embodiments, and can be embodied in the following aspects.

o Omission of one of the auxiliary leg 43 and the second connecting spacer 47;
- As shown in FIGS. 16 and 17, each support frame 15 of the support frame unit 36 should be erected without being tilted. The support frames 15 are stacked in an aligned state in the horizontal direction. Each support frame 15 is connected while maintaining a mutual interval by the first connection spacer 46 and the second connection spacer 47 . An auxiliary leg 43 is attached to the lower end of each support frame 15 . A pair of support frame stands 41 are provided on both sides of the support frame unit 36 so as to sandwich the support frame unit 36 in the same manner as in the above embodiment. In this modification, the inclined support portion 41c at the tip of the bottom portion 41a of the support frame stand 41 is not provided. The bottom portion 41 a is formed to have a large vertical width so that the bottom surface of the bottom portion 41 a is at the same height as the bottom surface of the second connecting spacer 47 . In addition, the upper side portion 41b is long and the angle of inclination with respect to the bottom side portion 41a is small so that the support frame 15 can be supported in an upright position.

・As shown in FIG. 18, the length of the bottom part 41a of the support frame stand 41 is shortened, and the upper part 41b is composed of a lower upright part 41d and an upper slanted part 41e. To narrow the lateral width of the entire support frame stand 41. - 特許庁In this way, the width of the entire support frame unit 36 and the support frame stand 41 can be narrowed, which is advantageous when the support frame unit 36 is placed on the narrow loading platform L of the truck TR.

・As shown in FIG. 19, the length of the bottom part 41a of the support frame stand 41 is shortened, and the upper part 41b is composed of a lower upright part 41d and an upper horizontal part 41f, resulting in the configuration of FIG. Similarly, the width of the entire support frame stand 41 in FIG. 16 should be narrowed. Therefore, the overall width of the support frame unit 36 and the support frame stand 41 can be narrowed, which is advantageous when the support frame unit 36 is placed on the narrow loading platform L of the truck TR.

- In the embodiment shown in Figures 7 to 16, the top side 41b is upright. In this way, the bottom portion 41a can be shortened, and the lateral width of the entire support frame stand 41 can be narrowed.

- In the embodiment of Figs. 16 and 17, the support frame stand 41 is provided only on either the left or right side.
(Other technical ideas)
The technical ideas understood from both the above-described embodiments and modifications are as follows.

(A) A support unit for a support frame, comprising the support frame stand 41 according to claim 1 and connecting spacers 46 and 47 which are detachably attached to the support frames 15 and connect adjacent support frames 15 to each other.

In this configuration, the support frame 15 of the support frame unit 36 can be maintained in a connected state, which is useful in transporting the support frame unit 36 .
(B) Connecting spacers 46 and 47 which are detachably attached to the support frame stand 41 described in claim 1 and the support frames 15, connect the adjacent support frames 15, and maintain the interval between the support frames 15. and a support unit for the support frame.

In this configuration, since the mutual spacing between the support frames 15 of the support frame unit 36 can be maintained, damage to the support frames 15 can be avoided.
(C) A support unit for a support frame having the support frame stand 41 according to claim 1 and an auxiliary leg 43 detachably attached to the lower end of the support frame 15 .

In this configuration, the support frame stand 41 and the auxiliary legs 43 can stabilize the installation state of the support frame unit 36 with the support frame 15 erected.
(D) A transportation method for loading and transporting the support frame units 36 stacked in the stacking method according to claim 4 on the bed L of the truck TR.

According to this method, the projection area of the support frame unit 36 can be reduced on the loading platform L of the truck TR, so that the support frame 15 can be transported without being disassembled.

DESCRIPTION OF SYMBOLS 11... Concrete formwork apparatus 15... Support frame 16... Beam material 17... Post 18... Top frame material 21... Face plate 36... Support frame unit 41... Support frame stand 41a... Bottom part 41b... Top part 46... First connection spacer 47 …Second connection spacer C…Concrete lining TN…Tunnel

Claims (10)

In a concrete formwork apparatus used for placing lining concrete for tunnels, a bottom portion detachably fixed to the bottom surface of a support frame for supporting a face plate for concrete molding, and one end portion of the bottom portion a support frame stand for a support frame of a concrete forming apparatus, having a top portion extending from and detachably fixed to a side surface of said support frame at its distal end. 2. A support frame stand for a support frame of a concrete form apparatus according to claim 1, wherein said bottom side portion and said top side portion are in a positional relationship to support said support frame in an inclined state. 2. A support frame stand for a support frame of a concrete forming apparatus according to claim 1, wherein said bottom portion and said top portion are in a positional relationship to support said support frame in an upright state. In a concrete formwork apparatus used for placing lining concrete for a tunnel, a support frame for supporting a face plate for molding concrete is erected by the support frame stand according to any one of claims 1 to 3. 1. A method of stacking support frames for a concrete formwork apparatus, comprising: maintaining a state, stacking a plurality of support frames in an aligned state, and connecting the support frames to form a support frame unit. 5. The method of stacking support frames for a concrete forming apparatus according to claim 4, wherein the support frames are erected in an inclined state. 6. The method of laminating a support frame for a concrete forming apparatus according to claim 5, wherein the support frame stand supports the support frame from below in the direction of inclination. 5. The method of stacking support frames for a concrete formwork apparatus according to claim 4, wherein spacers are provided between said support frames to maintain a gap between adjacent support frames. 8. The method of stacking support frames for a concrete formwork apparatus according to claim 7, wherein the spacer is rotatable in a plane along the direction of inclination of the support frame. 5. The method of stacking support frames for a concrete forming apparatus according to claim 4, wherein the support frames are erected in an upright state. In a concrete formwork apparatus used for placing lining concrete for a tunnel, a support frame for supporting a face plate for molding concrete is erected by the support frame stand according to any one of claims 1 to 3. A plurality of support frames are stacked in an aligned state, and the support frames are connected to form a support frame unit. A method for constructing a concrete formwork apparatus, in which the support frames of the support frame unit are placed in place, and thereafter the support frames of the support frame units are sequentially constructed as the concrete formwork apparatus.

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