JPH1088987A - Method and device for installing waterproof sheet in tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly and easily attach a waterproof sheet to the inner surface of a tunnel in a short time without depending on manual power so as to facilitate subsequent placement of a secondary lining concrete. SOLUTION: A support member 38 having a hook-and-loop fastener on its surface is anchored to the inner surface of a tunnel, and a waterproof sheet provided at its outer surface with a locking layer that can be locked with the hook-and-loop fastener is spread over the outer surface of a working truck whose outer face is smaller than and almost similar in shape to the inner surface of the tunnel. further, a pressure means by which the waterproof sheet attached to the outer surface of the working truck is pressed toward the inner surface of the tunnel is moved in the longitudinal direction of the tunnel, so that while the locking layer is being locked with the hook-and-loop fastener on the support member 38, the waterproof sheet is attached to the inner surface of the tunnel from one end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for mounting a waterproof sheet on the inner surface of a tunnel during construction of the tunnel.

[0002]

2. Description of the Related Art In the construction of a tunnel, a waterproof sheet is generally mounted on the inner surface of the tunnel. Conventionally, this mounting work has been performed by an operator driving a concrete nail or the like through a waterproof sheet into the inner surface of the tunnel from a scaffold or a work table installed in the tunnel.

[0003]

The above-mentioned method requires a large number of workers, not only takes a long time, but also requires a worker to attach the waterproof sheet to the ceiling of the tunnel. It was very difficult because I had to do it with my face facing.

Conventionally, a large number of narrow waterproof sheets are joined together by heat welding or the like, so that the number of joints increases, cracks occur at the joints, and lack of watertightness due to unwelding. The fear was great.

[0005] In order to solve the above-mentioned drawbacks, the waterproof sheet is pressed against the inner surface of the tunnel by using the pressing force of the fresh concrete when the secondary lining concrete is poured into the tunnel, and the waterproof sheet is pressed. It is also known that the installation and the placement of the secondary lining concrete are performed almost simultaneously.

However, in this method, since the secondary lining concrete is cast without completely fixing the waterproof sheet to the tunnel, the waterproof sheet is not uniformly attached to the inner surface of the tunnel, and a part of the waterproof sheet is overlapped. Alternatively, there is a possibility that concrete will be poured in a state where the waterproof sheet is broken due to a tensile force acting locally.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and a waterproof sheet is uniformly and easily mounted on the inner surface of a tunnel in a short time without human power. It is an object of the present invention to provide a method and an apparatus for mounting a waterproof sheet in a tunnel, which can easily perform secondary lining concrete thereafter.

[0008]

According to the present invention, the above-mentioned problem is solved as follows. (1) A support member having a hook-and-loop fastener on its surface is fastened to the inner surface of the tunnel, and the outer surface of the work cart is smaller than the inner surface shape of the tunnel and substantially similar to the inner surface of the tunnel. A pressing means for developing a waterproof sheet having an engaging layer capable of engaging with the fastener on the outer surface thereof, and pressing the waterproof sheet toward the inner surface of the tunnel, which is mounted on the outer surface of the work cart, in a longitudinal direction of the tunnel. The waterproof sheet is attached to the inner surface of the tunnel sequentially from one side end thereof while the engaging layer is engaged with the surface fastener of the support member.

(2) In the above item (1), the pressing means is moved in the longitudinal direction with respect to the work cart while the work cart is stopped in the tunnel.

(3) In the above item (1), the pressing means is moved in the longitudinal direction of the tunnel together with the work vehicle while the pressing means is fixed to the work vehicle.

(4) In any one of the above items (1) to (3), after forming the primary lining concrete on the inner surface of the tunnel, the supporting member is fixed to the primary lining concrete.

(5) In any one of the above items (1) to (4), the waterproof sheet is placed on the top of the work cart in a state of being wound from both sides toward the center. Expand to both sides.

(6) In any one of the above items (1) to (5), after the waterproof sheet is attached to the inner surface of the tunnel, concrete is poured between the inner surface of the waterproof sheet and the outer surface of the work cart. .

(7) A waterproof sheet developed on the outer surface of the work cart is provided on the outer surface of the work cart, the outer shape of which is smaller than and substantially similar to the inner shape of the tunnel.
Pressing means for pressing the inner surface of the tunnel is slidably mounted in the longitudinal direction, and moving means for moving the pressing means in the longitudinal direction is provided on the work cart.

(8) In the above item (7), the moving means is:
The cross-sectional shape of the outer surface of the work cart is larger than and substantially similar to the cross-sectional shape of the work cart, and is linked to a belt-shaped attachment band near the outer surface of the work cart, and the pressing means is provided on the outer surface of the attachment band. Fix it.

(9) In the above item (7) or (8),
The pressing means is an air pipe that is long in the circumferential direction of the tunnel, is connected to an air supply source, and has an injection hole that opens on the surface toward the inner surface of the tunnel.

(10) In the above item (8), the pressing means is provided with a number of rollers attached to the attachment band with an axis oriented in a tangential direction of the attachment band.

(11) In the above item (10), the roller supporting frame for pivotally supporting each roller is mounted on the mounting band so as to be able to be separated from the outer surface of the mounting band, and between the mounting band and the roller supporting frame. , Arrange the air tube.

(12) In the above item (11) or (12), the inward arm connected to each end of the attachment band is
Both ends of the air damper are connected to the moving body and the arm portion at a portion that is pivotally attached to a moving body that can be moved in the longitudinal direction of the work cart by the moving means, and that is apart from the pivoting portion. .

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which a tunnel construction work is performed by applying the inventions of claims 1, 2 and 4 to 9 will be described below with reference to FIGS. . In the following description, the front of the paper of FIG. 1 and the right of FIG. 3 are referred to as “front”, and the rear of the paper of FIG. 1 and the left of FIG. 3 are referred to as “rear”.

First, two rails (3) extending in the front-rear direction are parallel to each other on the bottom surface (A) in the arched excavation hole (2) provided in the ground (1). The wheels (5) and (5) provided on the lower surface of the work truck (centre) (4) are placed on the rail (3).

The centre (4) is formed by connecting a large number of beams (6) (7) directed in the left-right direction and the front-rear direction and a large number of vertical columns (8) to the outer periphery of a centre body (9). Drill hole in the part
It has an arched outer wall (10) that is smaller and more similar to the inner surface of (2), and has horizontal work platforms (11) and (12) before and after the center body (9). The center
(4) can be moved on the rail (3).

The outer wall (10) is formed by connecting a large number of substantially rectangular panel bodies (10a) vertically and horizontally, and each of the panel bodies (10a) can be removed or moved to a storage position. It is possible to do it.

On the lower surface of the left and right beams (7),
A rail device (13), which faces the longitudinal direction of (4) and has both ends thereof reaching the front and rear ends of the center body (9), is fixed. As shown in an enlarged manner in FIG.
(13) is a U-shaped cross section and two rail members (14) and (14) that are symmetrical to each other are brought close to each other back to back, and the lower surfaces of both are connected by a connecting plate (15). Are linked.

A horizontal receiving piece at the lower end of the rail member (14)
On both upper and lower surfaces of (16), upper and lower rollers (20) (20) (20) (20) which are rotatably supported on a side plate (19) rising from both sides of the base (18) of the moving body (17) so as to be rotatable about a horizontal axis. ) (21) (21) comes in contact
On the side end surface of (16), the side plates (19) are in contact with the guide rollers (22) (22) pivotally supported around a vertical axis,
The moving body (17) can move along the rail members (14) (14).

At the front and rear ends of the base (18) of each mobile unit (17), a pair of sprockets (24) and (25) pivotally mounted on both front and rear ends of the rail device (13) are wound around. Each end of the chain (24) is fastened. Rear left and right sprockets (25)
(25) are connected to each other by a rotating shaft (26) facing in the left-right direction. In the center of the rotating shaft (26), an intermediate sprocket
(27) is fixed, and this intermediate sprocket (27),
An endless chain (31) is wrapped around a drive sprocket (30) fixedly fitted to a rotating shaft of a motor (29) fixed to a mounting plate (28) in the center (4), thereby obtaining a motor (29). By the operation of, the moving body (17) can be moved in the front-rear direction along the rail member (14).

The base (18) of the moving body (17) is provided at the end of an arch-shaped mounting band (32) slightly larger than the cross-sectional shape of the outer wall (10) and substantially similar thereto. The horizontal arm part (33) is connected, and the attachment band (32) is held so as to cover the outer wall (10).

An air pipe (34) connected to an air supply source (not shown) is fixed to the outer surface of the mounting band (32) and connected to an air supply source (not shown). A tunnel is provided on the surface of the air pipe (34). A large number of injection holes (3
5) are provided at appropriate intervals in the longitudinal direction of the air pipe (34).

After moving the centre (4) to the place where the waterproof sheet (S) is to be mounted, the working table (11) (12) is used to move the center (4) to the inner surface of the excavation hole (2) or to the necessary position. A large number of support members (38) (38) (in which a surface fastener (37) is fixed to the surface of a disk-shaped main body (36) on the inner surface of the primary lining concrete (B) sprayed and hardened on the inner surface according to 2) are fixed with concrete nails (39) along the circumferential direction and the length direction of the tunnel at predetermined intervals (see FIG. 2).

Next, after the motor (29) is operated to move the air pipe (34) to the rear end position of the outer wall (10) (see the phantom line in FIG. 3), for example, the inner pipe (centre (4)) Side) is a non-water-permeable synthetic resin sheet, and on the outside (inside of the tunnel)
It has a double structure with a binding layer made of non-woven fabric or the like that can engage with the hook-and-loop fastener (37).
A wide waterproof sheet (S), which is substantially equal to the entire length of (4), is wound in advance from the left and right sides toward the center so as to form eyeglasses in a front view.
Place on top of (4) (see phantom line in FIG. 1).

Subsequently, a waterproof sheet placed on the top of the top
Unfold (S) diagonally downward along the outer wall (10)
The outer wall (10) and the air pipe (34) are covered with a waterproof sheet (S) (see FIGS. 1 and 3).

Next, the rear end of the waterproof sheet (S) is attached to the front end of the preceding waterproof sheet (S ') already mounted on the inner surface of the tunnel and having the secondary lining concrete (C) formed on the inner surface. After the centrifuge (4) is stopped, the air supply source is operated to supply air into the air pipe (34), and the motor (29) is operated. (34) is gradually moved in front of the center (4). Then, the primary lining concrete (B) from the injection hole (35)
Waterproof sheet by the pressure of the air injected toward
(S) rises to the inner surface of the tunnel sequentially from the rear end side to the front end side, and the anchoring layer such as a nonwoven fabric formed on the outer surface of the waterproof sheet (S) is the primary lining concrete.
By being pressed into contact with the surface fastener (37) of the support member (38) attached to (B), the support member (38) is uniformly mounted on the inner surface of the primary lining concrete (B).

As shown in an enlarged manner in FIG. 4, the arm portion (33) is located at a level equal to the lowermost panel body (10a) of the outer wall (10). When moving the outer wall (10), the lowermost panel body (10a) is kept horizontal so that the arm section (33) does not interfere with the panel body (10a).

When the air pipe (34) reaches the front workbench (12), the supply of air is stopped to prevent air pressure from being applied to the front end of the waterproof sheet (S).
The front end of (S) is not in contact with the primary lining concrete (B).

Thereafter, the air pipe (34) is connected to the rear work table (1).
Return to 2) and attach the waterproof sheet (S) and outer wall
A second lined lining concrete is poured between (10) and hardened (not shown). The front end of the waterproof sheet (S) is joined to the rear end of the next waterproof sheet.

By repeating such operations sequentially, the installation of the waterproof sheet (S) and the placement of the secondary lining concrete (C) can be performed in a batch manner over the entire length of the tunnel.

As described above, the primary lining concrete
By attaching a support member (38) having a hook-and-loop fastener (37) to (B) and attaching the waterproof sheet (S) to the primary lining concrete (B) using the pressure of air, With a small number of people, easily and in a short time,
(S) can be uniformly mounted on the tunnel.

After the waterproof sheet (S) is completely fixed to the primary lining concrete (B), the secondary lining concrete
Since the casting of (C) is performed, the work of placing the secondary lining concrete (C) is easy, and the primary lining concrete is also used.
A series of operations from the formation of (B) to the placement of the secondary lining concrete (C) can be smoothly performed.

When the primary lining concrete (B) is not formed, the support member (38) is directly attached to the excavation hole (2), and the waterproof sheet (S) is attached in the same manner as described above. Good.

Next, claims 1, 3 to 8 and 10 to 12 will be described.
A second embodiment of the present invention to which the invention described in (1) is applied will be described with reference to FIGS. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In the second embodiment, instead of the air pipe (34), a roller device (40) having a number of rollers is fixed to the upper surface of the attachment band (32).

The roller device (40) has an arch shape and fixes a tub-shaped base frame (41) having an open upper surface to the outer surface of the mounting band (32). , A number of roller units (42) are provided in a row in the length direction of the base frame (41),
An air tube (43) is provided between the bottom surface of (41) and the roller unit (42).

The roller unit (42) has mounting plates (4
4) and hanging pieces (45) on both left and right sides of the bottom
And a roller support frame (46) with projections, and mounting plates (44) at both ends.
The upper portion of the air tube (43) is loosely fitted between the both hanging pieces (45) (see FIG. 10). One of the roller support frame (46) and the base frame (41) has a retaining means (not shown) for preventing the roller unit (42) from completely falling out of the base frame (41).
Is provided.

In order to attach the waterproof sheet (S) to the tunnel by this device, in the same manner as in the first embodiment,
Fix the support member (38) to the primary lining concrete (B),
After adjusting the roller device (40) to the rear end position of the outer wall (10), the waterproof sheet (S) is spread on the outer wall (10).

The outer diameter of the roller device (40) is substantially equal to that of the inner surface of the tunnel, and the roller unit (42) is urged toward the inner surface of the tunnel by the action of the air tube (43). The portion of the sheet (S) that is in contact with the roller (47) is pressed against the inner surface of the tunnel, and the nonwoven fabric provided on the back surface of the waterproof sheet (S) is applied to the surface fastener (37) of the support member (38). It is attached to the tunnel by contact (see Fig. 7)

Therefore, when the motor (29) is operated and the roller device (40) is gradually moved forward of the center (4),
The waterproof sheet (S) is sequentially mounted on the inner surface of the tunnel from the rear end side to the front end side (see FIG. 8). After this,
Pour secondary lining concrete (C).

If the roller (47) receives resistance due to the unevenness of the primary lining layer (B) when the roller device (40) moves, the roller (47) deforms the air tube (43). While the base frame (4
Since the roller (47) moves to the bottom side of (1), the roller (47) can smoothly get over these irregularities and the like.

As shown in FIG. 9 in an enlarged manner, in the second embodiment, the inner end of the arm portion (43) is moved around the axis in the front-rear direction with respect to the base of the moving body (17). The side plate (19) of the moving body (17), which is pivotally mounted so as to be freely rotatable, and is separated from the pivot portion.
Since both ends of the air damper (48) are pivotally connected to the arm and the middle part of the arm (33) so as to be rotatable around the axis in the front-rear direction, the roller (47) is in the primary lining layer (B). Even if a load is applied to the attachment band (32), etc. by imitating the unevenness of the arm, the load will be applied to the pivotal connection between the arm (33) and the moving body (17) and the air damper.
Since it is absorbed by (48), there is no problem such as breakage of the joint between the arm (33) and the moving body (17).

According to such an embodiment, the waterproof sheet (S) can be evenly mounted on the inner surface of the tunnel with a small number of persons easily and in a short time, and the secondary lining concrete (C) is cast. It can be done easily.

In the first embodiment, the air pipe (3
Although power for supplying air to 4) is required, the roller (47) of the second embodiment has the advantage that no power is required.

In the above description, the center (4) is stopped in the tunnel, and the air pipe (34) and the roller
Although the pressing means such as (47) is moved in the longitudinal direction of the sentry (4) by the moving means, these pressing means are fixed to the sentry (4), and the sentry (4) itself is railed. By moving along (3), waterproof sheet
(S) may be sequentially mounted on the inner surface of the tunnel while being pressed outward by the pressing means.

In this case, there is an advantage that the moving means is not required and the support of the pressing means is simplified.

[0053]

According to the present invention, the following effects can be obtained. (a) According to the first aspect of the present invention, compared to the conventional method, a small number of people, easily and in a short time, apply the waterproof sheet to the inner surface of the tunnel from one end to the other end in a uniform order. In addition to being able to be mounted, it is not necessary to provide the pressing means on the entire outer surface of the work cart, so that the structure can be simplified. In addition, since the length of the tunnel in the waterproof sheet in the longitudinal direction can be increased arbitrarily, the number of welding points for joining the waterproof sheets is reduced, and a lack of water tightness due to cracks or unwelding at the welding points is correspondingly reduced. Can be significantly reduced.
Further, conventionally, a sheet sticking work cart or the like is required to mount the waterproof sheet, but these can be eliminated.

(B) According to the second aspect of the present invention, it is not necessary to move the work cart at the time of attaching the waterproof sheet, and immediately after the attaching operation of the waterproof sheet is finished, the secondary lining concrete is poured. Construction work can be started.

(C) According to the third aspect of the invention, since the pressing means only needs to be fixed to the work cart, the supporting structure of the pressing means is simplified.

(D) According to the fourth aspect of the invention, the support of the supporting member is strengthened by the primary lining concrete.

(E) According to the fifth aspect of the present invention, the transport of the waterproof sheet and the deployment on the work cart become easy.

(F) According to the sixth aspect of the present invention, after the waterproof sheet is completely fixed to the inner surface of the tunnel, the secondary lining concrete is cast. The work is easy, and a series of work up to the placement of the secondary lining concrete can be smoothly performed.

(G) According to the seventh aspect of the present invention, by using this apparatus, the method of the first aspect of the present invention can be carried out more efficiently, and the number of persons can be reduced and the number of persons can be reduced. In addition, the waterproof sheet can be attached to the inner surface of the tunnel from one end to the other end in a short time in a uniform manner. In addition, since a wider waterproof sheet can be used than before, the number of welding points for connecting the waterproof sheets is reduced, and there is a possibility that cracks at the welding points and lack of water tightness due to unwelding may occur. It is possible to remarkably reduce the pressure, and it is not necessary to provide the pressing means on the entire outer surface of the work cart, so that the structure can be simplified. Further, conventionally, a sheet sticking work cart or the like is required to mount the waterproof sheet, but these can be eliminated.

(H) According to the eighth aspect of the present invention, since the pressing means long in the circumferential direction of the tunnel can be fixed to the attachment band, the support of the pressing means is stabilized.

(I) According to the ninth aspect of the present invention, by using the pressure of air, the waterproof sheet can be mounted in a shorter time, and the rigid body comes into contact with the waterproof sheet. Since there is no risk, there is no risk of breakage of the waterproof sheet.

(J) According to the tenth aspect of the present invention, the waterproof sheet can be mounted in a shorter time, and the roller itself does not require any power. Can be achieved.

(K) According to the eleventh aspect of the present invention, when the roller device moves, even if the roller receives resistance due to irregularities on the inner surface of the tunnel, the roller continues to deform while deforming the air tube. Since the roller moves to the bottom side of the frame, the roller can smoothly get over these irregularities and the like.

(L) According to the twelfth aspect of the present invention, even if a load is applied to the attachment band or the like due to the roller coming into contact with the unevenness on the inner surface of the tunnel, the load is applied to the arm and the moving body. Therefore, problems such as breakage of the joint between the arm and the moving body do not occur.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a state before a waterproof sheet is attached according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional front view of a main part of FIG. 1;

FIG. 3 is a vertical sectional side view along the line III-III of FIG. 1;

FIG. 4 is an enlarged view of a portion IV in FIG. 1;

FIG. 5 is a cross-sectional plan view along the line VV of FIG. 3;

FIG. 6 is a vertical cross-sectional front view showing a state when the mounting of the waterproof sheet is completed.

FIG. 7 is a longitudinal sectional front view showing a state before a waterproof sheet is attached according to a second embodiment of the present invention.

8 is a vertical sectional side view along the line VIII-VIII of FIG. 7;

FIG. 9 is an enlarged view of a portion IX in FIG. 8;

FIG. 10 is an enlarged view of a portion X in FIG. 9;

[Explanation of symbols]

 (1) Ground (2) Excavation hole (3) Rail (4) Centre (working trolley) (5) Wheel (6) (7) Beam (8) Post (9) Centre body (10) Outer wall (10a) Panel body (11) (12) Work table (13) Rail device (moving means) (14) Rail material (15) Connecting plate (16) Receptacle (17) Moving body (moving means) (18) Base (19) Side plate (20) (21) Roller (22) Guide roller (23) Chain (24) (25) Sprocket (26) Rotary shaft (27) Intermediate sprocket (28) Mounting plate (29) Motor (30) Drive sprocket (31 ) Chain (32) Mounting band (33) Arm part (34) Air pipe (pressing means) (35) Injection hole (36) Main body (37) Face fastener (38) Support member (39) Concrete nail (40) Roller device ( (Pressing means) (41) Base frame (42) Roller unit (43) Air tube (44) Mounting plate (45) Hanging piece (46) Roller support frame (47) Roller (48) Air damper (A) Ground (B) 1 Secondary lining concrete (C) Secondary lining concrete (S) Tarpaulin (S ') Tarpaulin

Claims (12)

[Claims] 1. A support member having a hook-and-loop fastener on a surface thereof is fixed to an inner surface of a tunnel, and an outer surface of the work cart is smaller in size than the inner surface of the tunnel and substantially similar to the inner surface of the tunnel. A pressing means for developing a waterproof sheet provided with an engaging layer capable of engaging with the hook-and-loop fastener on the outer surface, and mounted on the outer surface of the work cart, for pressing the waterproof sheet toward the inner surface of the tunnel, By moving in the longitudinal direction, the waterproofing sheet is sequentially attached to the inner surface of the tunnel from one side end thereof while the engaging layer is engaged with the surface fastener of the support member. How to attach the seat. 2. The waterproof sheet according to claim 1, wherein the pressing means is moved in the longitudinal direction with respect to the work vehicle while the work vehicle is stopped in the tunnel. Mounting method. 3. The method of mounting a waterproof sheet in a tunnel according to claim 1, wherein the pressing means is moved in the longitudinal direction of the tunnel together with the work vehicle while the pressing means is fixed to the work vehicle. . 4. The tunnel according to claim 1, wherein after forming the primary lining concrete on the inner surface of the tunnel, a support member is fixed to the primary lining concrete. How to attach a waterproof sheet. 5. After mounting the waterproof sheet on the top of the work cart in a state of being wound from both sides to the center,
2. The unfolding device according to claim 1, wherein the unfolding device is deployed toward both sides.
A method for mounting a waterproof sheet in a tunnel according to any one of the above-mentioned items. 6. The method according to claim 1, wherein after the waterproof sheet is mounted on the inner surface of the tunnel, concrete is poured between the inner surface of the waterproof sheet and the outer surface of the work cart. To install a tarpaulin in a tunnel. 7. A waterproof sheet developed on the outer surface of the work vehicle, the outer surface of which is smaller than and substantially similar to the inner surface shape of the tunnel. A pushing means for slidably mounting in a longitudinal direction, and a moving means for moving the pushing means in the longitudinal direction are provided on a work cart. Mounting device. 8. The moving means is larger in size and substantially similar to the cross-sectional shape of the outer surface of the work cart,
8. The installation device for a waterproof sheet in a tunnel according to claim 7, wherein the device is linked to a band-shaped mounting band close to the outer surface of the work cart, and the pressing means is fixed to the outer surface of the mounting band. 9. The pressing means is long in the circumferential direction of the tunnel,
9. A waterproof sheet into a tunnel according to claim 7, wherein the air pipe is an air pipe which is connected to an air supply source and has on its surface an injection hole which opens toward the inner surface of the tunnel. Mounting device. 10. The apparatus for mounting a waterproof sheet in a tunnel according to claim 8, wherein the pressing means includes a plurality of rollers mounted on the mounting band with an axis oriented in a tangential direction of the mounting band. 11. A roller support frame for pivotally supporting each roller,
The waterproof sheet according to claim 10, wherein the waterproof sheet is attached to the attachment band so as to be separated from an outer surface of the attachment band, and an air tube is provided between the attachment band and the roller support frame. Mounting device. 12. An inward arm connected to each end of the attachment band is pivotally attached to a movable body which can be moved in the longitudinal direction of the work cart by a moving means, and the pivotally attached portion thereof. The device for mounting a waterproof sheet in a tunnel according to claim 10 or 11, wherein both ends of the air damper are connected to the moving body and the arm portion at a portion separated from the moving body.