JP6669508B2 - Sheet-like member laying device and sheet-like member laying method - Google Patents

Description

  The present invention relates to an apparatus for laying a sheet-like member in a lower half region of an inner peripheral surface of a tunnel, and a method for laying a sheet-like member using the apparatus.

  Patent Literature 1 discloses a waterproof sheet stretching apparatus used when rewinding a waterproof sheet wound around a sheet roll and stretching the waterproof sheet around an inner wall of a tunnel. The waterproof sheet stretching apparatus includes at least a pair of rail members provided on the work carriage in a substantially arch shape along the inner wall of the tunnel, at least a pair of wheel members provided movably on the rail members, and a wheel member. And a shaft member rotatably supporting the sheet roll.

JP 2000-291392 A

  Usually, the cross-sectional shape of the mountain tunnel is a semicircular shape that is upwardly convex, and a waterproof sheet stretching apparatus as disclosed in Patent Document 1 can be used at the time of construction.

  However, in the construction of a mountain tunnel, if the water pressure in the ground is high and the leakage of water from the ground into the tunnel is to be suppressed, it is necessary to make the cross section of the tunnel a shape that can withstand the water pressure of the ground (Ie, it is necessary to have a hydraulic cross section). Therefore, for example, a circular shape can be adopted as the cross-sectional shape of the tunnel. In addition, it is necessary to lay a waterproof sheet all around the inner peripheral surface of the tunnel.

  In this regard, even if an attempt is made to lay a waterproof sheet over the entire circumference of the inner peripheral surface of a tunnel having a circular cross section using a waterproof sheet stretching apparatus as disclosed in Patent Document 1, the wheels of a work vehicle that constitutes the apparatus are in a tunnel. Since it is located on the bottom surface, it has been difficult to lay a sheet-like member such as a waterproof sheet on the lower half region of the inner peripheral surface of the tunnel (particularly, the bottom portion of the inner peripheral surface of the tunnel).

  The present invention has been made in view of such circumstances, and has as its object to efficiently lay a sheet-like member in a lower half region on the inner peripheral surface of a tunnel.

Therefore, the sheet-like member laying apparatus according to the present invention is an apparatus for laying a sheet-like member in a lower half region including a bottom on the inner peripheral surface of the tunnel. A sheet-like member laying device according to the present invention includes a gantry movable on a tunnel bottom surface in a tunnel axial direction, a bracket provided on the gantry so as to protrude from the gantry in a tunnel axial direction, and a sheet-like member supported by the bracket. and a stretched means capable stretched in a tunnel circumferentially along the member in the region of the lower half. The extending means includes a beam member provided on the bracket and extending in the tunnel width direction, and a lifting means provided on the beam member. The lifting means includes a linear member and a hoisting unit that winds the linear member.

A method for laying a sheet-like member according to the present invention is a method for laying the sheet-like member in the lower half region using the above- described sheet-like member laying apparatus. Here, a connecting means for connecting a shaft rod inserted into a core tube of a roll body of the sheet-shaped member to the leading end of the linear member is provided at the leading end of the linear member fed from the above-described winding means. Is provided. Hoisting means are provided at both ends of the beam member. In the method for laying a sheet-like member according to the present invention, a shaft rod is inserted into each core tube of the pair of rolls formed by winding the sheet-like member into eyeglasses. To be placed on the lower inner peripheral surface of the tunnel, the linear member is fed out from each hoisting unit along the inner peripheral surface of the tunnel, and the shaft is connected to the distal end of the linear member via the connecting unit. it, and, by winding the linear member by hoisting means, while rotating each of a pair of the roll body about the axis of the shaft rod, along the sheet-shaped member in the region of the lower half tunnel circumferential direction Expanding, including.

According to the present invention, deployed means by a bracket which is provided so as to project from the gantry to the tunnel axis direction is supported by the deployed section, the sheet-like member, a tunnel circumferentially along the region of the lower half To expand. Thus, since the sheet-like member at a position displaced from the gantry to the tunnel axis can be laid in the region of the lower half, cradle unobtrusive in this sheet-like member laying work, therefore, the work It can be performed efficiently.

The figure which shows the construction method of the tunnel in 1st Embodiment of this invention. The figure which shows the construction method of the tunnel in the said 1st Embodiment. Enlarged sectional view of the top end of the tunnel in which the first lining is performed in the first embodiment. Side view of the sheet-like member laying device according to the first embodiment. The figure which shows the schematic structure of the expansion means in the said 1st Embodiment. FIG. 2 is a perspective view of a pair of roll bodies formed by winding a sheet-like member into eyeglasses in the first embodiment. The figure which shows the laying method of the sheet-like member in the said 1st Embodiment. The figure which shows the joining method of the sheet-like members in the said 1st Embodiment. The figure which shows the moving method of the sheet-like member laying apparatus in the said 1st Embodiment. A perspective view of a roll of a sheet-like member according to a second embodiment of the present invention. The figure which shows the laying method of the sheet-like member in the said 2nd Embodiment. The figure which shows the laying method of the sheet-like member in the said 2nd Embodiment. The figure which shows the laying method of the sheet-like member in 3rd Embodiment of this invention. The figure which shows the schematic structure of the expansion means in 4th Embodiment of this invention. The figure which shows the schematic structure of the expansion means in 5th Embodiment of this invention. A perspective view of a roll body of a sheet-like member in the fifth embodiment. The figure which shows the laying method of the sheet-like member in the said 5th Embodiment. The figure which shows the laying method of the sheet-like member in 6th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 are views showing a tunnel construction method according to the first embodiment of the present invention. FIG. 3 is an enlarged cross-sectional view of the top end of the tunnel where the primary lining has been performed.
In this embodiment, for convenience, upper, lower, left and right are defined as shown in FIGS. Further, in the present embodiment, the sheet-shaped member laying device and the sheet-shaped member laying method according to the present invention will be described by taking the construction of a tunnel having a circular cross section as an example, but the cross-sectional shape of the tunnel is not limited to a circular shape. .

In the present embodiment, the NATM method is used as a tunnel construction method.
When constructing the tunnel 1, first, as shown in FIG. 1A, the ground is excavated into a semicircular shape having an upward convex to form an upper half region of the tunnel 1. The inner space 4 of the tunnel 1 is formed by repeating the primary lining (support) with the (steel arch support) 2 and the shotcrete 3.

In the primary lining process, as shown in FIG. 3, the steel supports 2 are built at predetermined intervals in the axial direction of the tunnel. The steel support 2 is, for example, an H-section steel. In the primary lining step, concrete is sprayed on the peripheral edge portion including the top end of the tunnel 1 (see the shotcrete 3 shown in FIG. 1A and FIG. 3). In this way, the primary lining of the upper half area of the tunnel 1 is performed.
Next, a lock bolt (not shown) is cast in the upper half area of the tunnel 1.

  Next, as shown in FIG. 1 (B), after excavating the ground into a semicircular shape having a downward convex to form a lower half region of the tunnel 1, similarly to the above, a steel support structure is formed. The primary lining (support) with the shotcrete 2 and the shotcrete 3 is repeated. As a result, a tunnel 1 having a circular cross section is formed. The construction of the lower half area of the tunnel 1 is sequentially performed from the face side toward the wellhead side.

Here, the inner peripheral surface 3a of the shotcrete 3 is referred to as "the inner peripheral surface 1a of the tunnel 1" for convenience of explanation. The internal space 4 of the tunnel 1 is surrounded by the inner peripheral surface 3a of the shotcrete 3 (the inner peripheral surface 1a of the tunnel 1).
Next, a lock bolt (not shown) is cast in the lower half region of the tunnel 1.

  Next, as shown in FIG. 1C, a sheet-like member 10 is laid in a lower half region of the inner peripheral surface 1a of the tunnel 1. In addition, about laying of this sheet-shaped member 10, it progresses sequentially from a face side to a pit side.

  The sheet member 10 has, for example, a two-layer structure composed of a resin waterproof sheet 11 and a resin nonwoven fabric 12, as shown in FIG. The waterproof sheet 11 has water impermeability. The nonwoven fabric 12 can function as a cushioning material for bringing the waterproof sheet 11 into close contact with the inner peripheral surface 3a of the shotcrete 3 (the inner peripheral surface 1a of the tunnel 1). The waterproof sheet 11 and the nonwoven fabric 12 each have flexibility. When the adjacent sheet-like members 10 are joined together, the ends of the respective waterproof sheets 11 are overlapped and thermally welded (see FIG. 8C). The configuration of the sheet-like member 10 is not limited to the above.

  When laying the sheet member 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1, a sheet member laying device 25 shown in FIG. Details of the configuration of the sheet-like member laying device 25 and details of the method of laying the sheet-like member 10 using the sheet-like member laying device 25 will be described later with reference to FIGS.

  Next, as shown in FIG. 2 (D), in the lower half region of the tunnel 1, the lining concrete 6 is constructed so as to cover the sheet-like member 10 from the inside of the tunnel 1, thereby forming the secondary covering. Work. The construction of the secondary lining in the lower half area of the tunnel 1 is sequentially performed from the face side toward the wellhead side.

  Next, as shown in FIG. 2E, backfilling of the earth and sand 7 is performed in the lower half region of the tunnel 1. The backfill of the earth and sand 7 proceeds sequentially from the wellhead side to the face side. The earth and sand 7 to be backfilled is generated, for example, when the tunnel 1 is excavated.

Next, as shown in FIG. 2F, the sheet-like member 10 is installed in the upper half region of the tunnel 1, and the secondary lining is performed by constructing the lining concrete 6. The installation of the sheet member 10 and the construction of the secondary lining in the upper half area of the tunnel 1 are sequentially performed from the wellhead side toward the face side. Here, for installation of the sheet-like member 10 in the upper half region of the tunnel 1, for example, a waterproof sheet stretching apparatus as disclosed in the above-mentioned Patent Document 1 can be used.
The construction of the tunnel 1 is performed as described above.

Next, the configuration of the sheet-like member laying device 25 will be described with reference to FIGS.
FIG. 4 is a side view of the sheet-like member laying device 25 in the present embodiment. FIG. 5 is a diagram showing a schematic configuration of the expanding means (Telha 50) constituting the sheet-like member laying device 25, and corresponds to the II section of FIG. Here, as for the scaffolds 63 and 64 shown in FIG. 5, illustration of handrails 63a and 64a (see FIG. 4) provided respectively is omitted. Further, the scaffold 63 shown in FIG. 5 has both ends in the tunnel axis direction projecting in the tunnel width direction and connected to the upper ends of the arc-shaped steps 61 and 62, respectively. Omitted.

  The sheet-like member laying device 25 is a device for laying the sheet-like member 10 in a lower half region of the inner peripheral surface 1a of the tunnel 1. The sheet-like member laying device 25 includes a gantry 30, an overhang frame portion 40, and a telha 50.

  The gantry 30 has a predetermined length in the tunnel axial direction, and a plurality of wheels 31 are provided at lower ends of its front and rear ends (tunnel axial ends). These wheels 31 can roll on rails 32 laid on the bottom surface 1 b of the tunnel 1. That is, the gantry 30 is movable in the tunnel axial direction via the wheels 31. Here, the rail 32 extends at a predetermined length in the tunnel axis direction. In the present embodiment, the gantry 30 can run on the rails 32 by using an electric motor (not shown) as a driving source. However, the traveling form of the gantry 30 is not limited to this. It may be configured to be able to run on the rail 32 by being pulled through a wire by a towing device such as a windable electric winch or a heavy machine such as a backhoe via a wire.

  At the lower end of the gantry 30, a plurality of jacks (not shown) are provided. These jacks extend when the traveling of the gantry 30 is stopped (especially when the sheet-like member 10 is laid and when the rails 32 are relocated), and come into contact with the bottom surface 1 b of the tunnel 1. By supporting it on 1b, the movement of the gantry 30 is restricted. In addition, these jacks are shortened when the gantry 30 runs, and are separated from the bottom surface 1b of the tunnel 1.

  At the upper part of the gantry 30, a temporary placing portion 35 is provided on which a plurality of sheet-like members 10 (in other words, roll bodies of the sheet-like members 10) wound in a roll shape are temporarily placed. The roll body of the plurality of sheet-shaped members 10 is transported from the wellhead side to the temporary placing part 35 by using a terha 37 and a transport basket 38. The terraha 37 is provided with a rail 37a provided at the top end of the tunnel 1 and extending in the tunnel axis direction, and an electric hoist 37b suspended along the rail 37a and movable in the tunnel axis direction along the rail 37a. Have been. A transport basket 38 is suspended from a hook 37c provided at the tip of a wire (not shown) fed from the electric hoist 37b via a wire 37d and a suspender (not shown). The transport basket 38 has a box shape with an open top. In the transport basket 38, a plurality of rolls of the sheet-like members 10 can be accommodated.

  The overhang frame portion 40 is provided on the gantry 30 so as to extend in the tunnel axial direction from the gantry 30 toward the face. The overhang frame portion 40 includes a pair of left and right column members 41, 41 extending in the vertical direction, a pair of left and right column members 42, 42 extending in the vertical direction, and a pair of left and right beams extending in the tunnel axis direction. It is configured to include members 43, 43 and a pair of left and right beam members 44, 44 extending in the tunnel axis direction.

The column members 41, 41 are erected on the face side end of the gantry 30. The pillar members 41, 41 have lower half regions functioning as pillars for supporting the temporary placement portion 35 of the gantry 30. The pit-side ends of the beam members 43, 43 are connected to the vertical center portions of the column members 41, 41, respectively. The pit-side ends of the beam members 44 are connected to the upper ends of the column members 41. The beam members 44, 44 are located in an upper half region in the internal space 4 of the tunnel 1.
Here, the function of the "bracket" of the present invention is realized by the column members 41, 41 and the beam members 44, 44.

The face side ends of the beam members 43, 43 are connected to central portions of the column members 42, 42 in the vertical direction. The face side ends of the beam members 44, 44 are connected to the upper ends of the column members 42, 42.
A predetermined distance L1 is provided between the column members 41 and 42 in the tunnel axis direction. This interval L1 is larger than the width of the roll body of the sheet-like member 10 (for example, the width L3 shown in FIG. 6).

  A beam member 45 is provided so as to connect the upper ends of the column members 42, 42. The beam member 45 extends in the tunnel width direction (left-right direction). Similarly, a beam member (not shown) is provided so as to connect the upper ends of the column members 41, 41.

Telha 50 is provided on the beam members 44, 44. The Telha 50 can function as the “expanding means” of the present invention, and can extend the sheet-like member 10 in the circumferential direction of the tunnel 1 along the lower half area of the inner peripheral surface 1 a of the tunnel 1. .
The Telha 50 includes a beam member 51 extending in the tunnel width direction, a rail 52 extending in the tunnel width direction, and a pair of left and right electric hoists 53L and 53R.

The beam member 51 is fixed to the beam members 44, 44 with a part of the upper surface being in contact with the lower surfaces of the beam members 44, 44.
The rail 52 is fixed to the rail 52 with its upper surface in contact with the lower surface of the beam member 51, and extends along the beam member 51 in the tunnel width direction.
The beam member 51 and the rail 52 are located in an upper half area in the internal space 4 of the tunnel 1.

  Each of the electric hoists 53L and 53R is movable in the tunnel width direction along the rail 52 and the beam member 51 while being suspended from the rail 52. The electric hoist 53L is located to the left of the electric hoist 53R. In the present embodiment, when the sheet-like member 10 is laid in the lower half region of the inner peripheral surface 1a of the tunnel 1, the electric hoist 53L is arranged at the left end of the rail 52, while the electric hoist 53R is connected to the rail 52. At the right end of the

  Here, the electric hoists 53L, 53R function as “lifting means” of the present invention. In the present embodiment, the electric hoists 53L and 53R can be located in at least one of the left region and the right region in the internal space 4 of the tunnel 1. In particular, in the present embodiment, when the sheet-shaped member 10 is laid in the lower half area of the inner peripheral surface 1 a of the tunnel 1, the electric hoist 53 </ b> L is located in the left area of the internal space 4 of the tunnel 1. The electric hoist 53R is located in the right region in the internal space 4 of the tunnel 1 (that is, the electric hoists 53L and 53R are located in both the left region and the right region in the internal space 4 of the tunnel 1).

Each of the electric hoists 53L and 53R includes an electric winch (not shown). This electric winch winds up the wire 54. A hook 55 is provided at the tip of the wire 54 fed from the electric winch.
Here, in the present embodiment, the electric winch provided in the electric hoists 53L, 53R functions as the "hoisting means" of the present invention. Further, the wire 54 can correspond to the “linear member” of the present invention.

  Therefore, the Telha 50 is supported by the overhanging frame portion 40 (particularly, the column members 41, 41 and the beam members 44, 44). The beam member 51 is provided on the overhang frame portion 40. The electric hoists 53L and 53R are provided on the beam member 51 via the rail 52.

The column members 41 and 42 on the left and right sides are provided with arc-shaped stepped portions 61 and 62, respectively. Each of the arc-shaped steps 61 and 62 is formed along the lower half region of the inner peripheral surface 1 a of the tunnel 1. Although not shown, a handrail is provided on each of the arc-shaped steps 61 and 62.
A predetermined interval L2 is provided between the arc-shaped steps 61 and 62 on both the left and right sides in the tunnel axis direction. This interval L2 is larger than the width of the roll body of the sheet-like member 10 (for example, the width L3 shown in FIG. 6).

  A scaffold 63 is provided on each of the arc-shaped steps 61 and 62 arranged at an interval L2 in the tunnel axis direction so as to straddle each upper end. The scaffold 63 is fixed to the column members 41 and 42 via, for example, connecting means (not shown), or is fixed to the column members 41 and 42 via arc-shaped steps 61 and 62. Therefore, the scaffold 63 can be supported by the overhang frame portion 40.

  Scaffolds 64 are provided on the arc-shaped steps 61 and 62 arranged at intervals L2 in the tunnel axis direction so as to be adjacent to the lower portions thereof. The scaffold 64 is, for example, directly fixed to the column members 41, 42 or indirectly fixed to the column members 41, 42 via arc-shaped steps 61, 62. Therefore, the scaffold 64 can be supported by the overhang frame portion 40.

  Between the lower half region of the inner peripheral surface 1a of the tunnel 1 and the scaffolds 63, 64, a roll of the sheet member 10 (for example, a roll 15L, 15R of the sheet member 10 shown in FIG. 6 described later). ) Is formed such that the roll body does not come into contact with the scaffolds 63 and 64 when the roll body is extended along the inner peripheral surface 1a of the tunnel 1.

  The worker can move back and forth between the scaffolds 63 and 64 by moving up and down the arc-shaped steps 61 and 62. In addition, the worker uses the arc-shaped steps 61 and 62 and the scaffolds 63 and 64 to perform a joining operation (see FIG. 8 described later) between the sheet members 10 without getting on the sheet members 10. be able to.

FIG. 6 is a perspective view of a pair of roll bodies 15L and 15R formed by winding the sheet-like member 10 into eyeglasses in the present embodiment.
The sheet-like member 10 is a long object, and has a width L3 of about 2 m, for example.
In the present embodiment, prior to laying the sheet-shaped member 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1, the sheet-shaped member 10 is wound around eyeglasses to form a pair of roll bodies 15L and 15R.

Here, a first example and a second example of a method of forming the “glasses winding” of the sheet-like member 10 including the pair of rolls 15L and 15R will be described.
In the first example, the sheet member 10 is wound around the core tube 16L from one end side of the sheet member 10 to form a roll body 15L, and the sheet member is wound around the core tube 16R from the other end side of the sheet member 10. The “glasses winding” of the sheet-like member 10 is formed by forming the roll body 15 </ b> R by winding the 10.

  In the second example, first, the sheet member 10 is wound around the core tube 16L to form the roll body 15L. Next, a sheet member 10 different from the sheet member 10 wound around the roll body 15L is wound around the core tube 16R to form the roll body 15R. Next, the winding end of the sheet member 10 in the roll body 15L and the winding end of the sheet member 10 in the roll body 15L are joined by heat welding or the like. In the second example, the "glasses winding" of the sheet-like member 10 is formed in this manner.

The shaft rods 17L, 17R are inserted into the core tubes 16L, 16R, respectively. The roll bodies 15L and 15R are rotatable around the axes of the shaft rods 17L and 17R.
Hanging balances 18L, 18R can be detachably attached to the shaft rods 17L, 17R. The hanging balances 18L, 18R can be suspended from the hooks 55 of the electric hoists 53L, 53R via the wires 19L, 19R. The shaft bars 17L, 17R and the roll bodies 15L, 15R can be suspended from the suspension balances 18L, 18R.

  Here, the suspension balances 18L, 18R and the wires 19L, 19R correspond to the "connection means" of the present invention, and the shaft rods 17L, 17R are connected to the tips (hooks 55) of the wires 54 of the electric hoists 53L, 53R. Implement the function to connect to.

Next, a method of laying the sheet member 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1 using the sheet member laying device 25 will be described with reference to FIGS. This will be described with reference to FIG.
FIG. 7 shows a method of laying the sheet member 10 in the present embodiment.

  First, the sheet-like member laying device 25 is arranged so that the planned place where the sheet-like member 10 is to be laid falls within the aforementioned intervals L1 and L2 (see FIG. 4). At this time, the rail 32 is laid on the bottom surface 1b of the tunnel 1 so that the rail 32 is not located immediately below the overhang frame portion 40. At this time, the plurality of jacks provided at the lower end of the gantry 30 are extended and abut on the bottom surface 1b of the tunnel 1 to support the gantry 30 on the bottom surface 1b of the tunnel 1, thereby moving the gantry 30. Restrict.

Next, as shown in FIG. 7A, the electric hoist 53L is arranged at the left end of the rail 52, while the electric hoist 53R is arranged at the right end of the rail 52.
Next, the wire 54 is fed out from the electric winch of each of the electric hoists 53L and 53R along the inner peripheral surface 1a of the tunnel 1. At this time, the wire 54 is fed downward so as to pass through the gap between the scaffolds 63 and 64 and the inner peripheral surface 1a of the tunnel 1 (that is, to avoid obstacles such as the scaffolds 63 and 64). .

  Next, the pair of roll bodies 15L and 15R (in other words, “glasses winding” of the sheet-like member 10) shown in FIG. 6 is placed on the inner peripheral surface 1a of the tunnel 1 immediately below the overhanging frame part 40 (the tunnel 1). (On the bottom surface 1b) (see FIG. 7A). Here, the work of forming the “glasses winding” of the sheet-like member 10 including the pair of roll bodies 15L and 15R is performed, for example, in an arbitrary working space on the wellhead side of the gantry 30 in the tunnel 1 or a temporary placing portion of the gantry 30 35 or on the inner peripheral surface 1a of the tunnel 1 directly below the overhanging frame part 40. Note that shaft rods 17L, 17R are inserted into the core tubes 16L, 16R of the pair of roll bodies 15L, 15R, respectively.

Next, the shaft rods 17L, 17R are connected to the distal ends (hooks 55) of the wires 54 of the electric hoists 53L, 53R via the wires 19L, 19R and the hanging balances 18L, 18R.
Next, as shown in FIGS. 7A and 7B, the wire 54 is wound up by the electric winch of each of the electric hoists 53L and 53R, whereby each of the pair of roll bodies 15L and 15R is connected to the shaft rods 17L and 17R. The sheet-like member 10 is spread in the tunnel circumferential direction along the lower half region of the inner peripheral surface 1a of the tunnel 1 while rotating about the axis. The stretched sheet member 10 is fixed to the lower half area of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while being in contact with the lower half area of the inner peripheral surface 1a of the tunnel 1.

FIG. 8 is a diagram showing a method of joining sheet-like members 10 adjacent in the tunnel axis direction.
Here, the sheet-like member 10-1 (see FIG. 8A) already laid in the lower half region of the inner peripheral surface 1a of the tunnel 1 and the sheet-like member laying device 25 are used to newly lay the sheet-like member 10-1. A joining method with the sheet member 10-2 (see FIG. 8B) will be described. Here, both of the sheet members 10-1 and 10-2 have the same configuration as the above-described sheet member 10. That is, the sheet-shaped member 10-1 is configured by the waterproof sheet 11-1 and the nonwoven fabric 12-1. The sheet member 10-2 is composed of a waterproof sheet 11-2 and a nonwoven fabric 12-2.

  First, as shown in FIGS. 8A and 8B, the sheet-like member laying device is arranged such that the well-side edge of the sheet-like member 10-1 is adjacent to the face side edge of the sheet-like member 10-2. 25, the sheet-like member 10-2 is laid in the lower half region of the inner peripheral surface 1a of the tunnel 1. Here, an extension 11t for forming a joint with the waterproof sheet 11-1 is formed in advance on the face side edge of the waterproof sheet 11-2 constituting the sheet member 10-2.

Next, as shown in FIG. 8C, the extension 11t of the waterproof sheet 11-2 is brought into surface contact with the edge of the wellhead side of the waterproof sheet 11-1 and is thermally welded to each other, so that the waterproof sheet 11-1 is formed. , 11-2 are joined to each other. By joining the sheet members 10-1 and 10-2 in this manner, the sheet members 10-1 and 10-2 are maintained in a state where water tightness between the sheet members 10-1 and 10-2 is secured. 10-2 can be integrated. The method of joining the sheet members 10-1 and 10-2 is not limited to the embodiment shown in FIG.
Regarding the work of joining the sheet-like members 10-1 and 10-2 to each other, the worker does not ride on the sheet-like members 10-1 and 10-2, and the worker makes the arc-shaped steps 61 and 62 and the scaffold. Operations can be performed from 63 and 64.

FIG. 9 is a diagram illustrating a method of moving the sheet-like member laying device 25 in the present embodiment.
Here, a method of moving the sheet-like member laying device 25 after the above-described laying of the sheet-like member 10-2 is completed will be described.

  First, when the laying of the sheet-like member 10-2 is completed as shown in FIG. 9A, the sheet-like member laying device 25 is moved to the wellhead side as shown in FIG. 9B. During this movement, the sheet-like member laying device 25 is moved so that the planned place where the new sheet-like member 10 is to be laid falls within the aforementioned intervals L1 and L2 (see FIG. 4). During this movement, the plurality of jacks provided at the lower end of the gantry 30 are shortened and separated from the bottom surface 1b of the tunnel 1. When this movement is completed, the jack is extended. Thereby, the jack contacts the bottom surface 1b of the tunnel 1 and supports the gantry 30 on the bottom surface 1b of the tunnel 1, so that the movement of the gantry 30 is restricted.

Next, as shown in FIG. 9C, by removing the rail 32 from the bottom surface 1b of the tunnel 1 and moving the rail 32 to the wellhead side, the rail 32 is not positioned directly below the overhanging frame portion 40. I do. For removing the rail 32, a Telha 50 may be used. Further, a traction device such as an electric winch capable of winding up a wire may be used for moving the rail 32. Further, the traction device may be mounted on the gantry 30.
When the movement of the rail 32 is completed, the rail 32 is laid on the bottom surface 1b of the tunnel 1.

  As described above, the sheet-like member 10 is laid in the lower half area of the inner peripheral surface 1a of the tunnel 1 and the sheet-like member laying device 25 is moved in the axial direction of the tunnel (more specifically, is moved to the wellhead side). repeat. Therefore, the laying of the sheet-like members 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1 proceeds sequentially from the face side toward the wellhead side.

  According to the present embodiment, the sheet-like member laying device 25 is a device for laying the sheet-like member 10 in a lower half region of the inner peripheral surface 1a of the tunnel 1. The sheet-like member laying device 25 includes a gantry 30 movable on the bottom surface 1b of the tunnel 1 in the tunnel axial direction, and a bracket (column members 41, 41) provided on the gantry 30 so as to project from the gantry 30 in the tunnel axial direction. And the beam members 44, 44) and the brackets (the column members 41, 41 and the beam members 44, 44) support the sheet-like member 10 along the lower half area of the inner peripheral surface 1 a of the tunnel 1 in the tunnel circumferential direction. (Telha 50) that can be extended to the vehicle. Accordingly, the sheet-like member 10 can be laid in the lower half region of the inner peripheral surface 1a of the tunnel 1 at a position shifted from the gantry 30 in the tunnel axial direction. The rail 32 is not in the way, so that the work can be performed efficiently.

  According to the present embodiment, the extending means (Telha 50) is provided on the beam members 51 provided on the brackets (the column members 41, 41 and the beam members 44, 44) and extending in the tunnel width direction. Lifting means (electric hoists 53L, 53R) provided. Thereby, the expanding means can have a simple configuration.

  Further, according to the present embodiment, the lifting means (the electric hoists 53L, 53R) is located in at least one of the left region and the right region in the internal space 4 of the tunnel 1, with the width direction of the tunnel being the left-right direction. In other words, in the present embodiment, the lifting means (the electric hoists 53L, 53R) are arranged at positions biased to at least one of the left and right sides in the internal space 4 of the tunnel 1. Thereby, the roll bodies 15L and 15R of the sheet-like member 10 can be lifted outside the overhang frame portion 40 in the tunnel width direction.

  Further, according to the present embodiment, the beam member 51 is located in the upper half region in the internal space 4 of the tunnel 1. Thereby, the roll bodies 15L and 15R of the sheet-like member 10 can be lifted to a relatively high position.

  Further, according to the present embodiment, the lifting means (the electric hoists 53L and 53R) can move in the tunnel width direction along the beam member 51. Thereby, the installation position of the lifting means can be set at an arbitrary position in the tunnel width direction.

  According to the present embodiment, the lifting means (the electric hoists 53L and 53R) includes a hoisting means (an electric winch (not shown)) for winding the linear member (the wire 54). Axial rods 17L and 17R inserted into the core tubes 16L and 16R of the rolls 15L and 15R of the sheet-like member 10 are provided at the distal end of the linear member (wire 54) fed from the hoisting means (electric winch). Connection means (suspension balances 18L, 18R and wires 19L, 19R) for connecting to the distal end of the linear member (wire 54) are provided. Thus, the sheet-like member 10 can be expanded with a simple configuration while lifting the roll bodies 15L and 15R of the sheet-like member 10.

  According to the present embodiment, the hoisting means (electric winch) of the lifting means (electric hoist 53L, 53R) is a line drawn out from the hoisting means (electric winch) along the inner peripheral surface 1a of the tunnel 1. The shape member (wire 54) is wound up. Thereby, the roll bodies 15L and 15R of the sheet-shaped member 10 can be lifted along the inner peripheral surface 1a of the tunnel 1 while avoiding obstacles such as the scaffolds 63 and 64.

  Further, according to the present embodiment, the sheet-shaped member 10 has water impermeability. Therefore, by laying the sheet-shaped member 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1, it is possible to suppress the intrusion of groundwater into the tunnel 1 in the region.

  According to the present embodiment, the sheet-like member laying device 25 is provided with hoisting means (electric winch) of lifting means (electric hoists 53L, 53R) at both ends of the beam member 51, respectively. As a method of laying the sheet-like member 10 in the lower half area of the inner peripheral surface 1a of the tunnel 1 by using, the cores of a pair of roll bodies 15L and 15R formed by winding the sheet-like member 10 into eyeglasses. Inserting the shaft rods 17L, 17R into the pipes 16L, 16R (see FIG. 6), the pair of roll bodies 15L, 15R are inserted into the tunnel 1 below the brackets (the column members 41, 41 and the beam members 44, 44). Placed on the peripheral surface 1a (see FIG. 7A), a linear member (wire 54) is drawn out from each hoisting means (electric winch) along the inner peripheral surface 1a of the tunnel 1, and the wire is drawn. Condition Connecting the shaft rods 17L, 17R to the tip of the material (wire 54) via connecting means (suspension balances 18L, 18R and wires 19L, 19R), and a linear member (electric winch) by each hoisting means (electric winch). By winding up the wire 54), the sheet-like member 10 is moved along the lower half area of the inner peripheral surface 1a of the tunnel 1 while rotating each of the pair of roll bodies 15L, 15R around the axis of the shaft rods 17L, 17R. Extending in the circumferential direction of the tunnel. Thus, the sheet member 10 can be continuously laid in the lower half area of the inner peripheral surface 1a of the tunnel 1 in the circumferential direction of the tunnel, so that the sheet member 10 can be laid efficiently. it can.

Next, a second embodiment of the present invention will be described with reference to FIGS.
FIGS. 10A and 10B are perspective views of the roll bodies 15L and 15R of the sheet-shaped member 10 in the present embodiment. 11 and 12 are diagrams illustrating a method of laying the sheet-like member 10 in the present embodiment.
The differences from the first embodiment will be described.

  As shown in FIGS. 10A and 10B, in the present embodiment, prior to laying the sheet member 10 in the lower half area of the inner peripheral surface 1a of the tunnel 1, the roll member of the sheet member 10 15L and the roll body 15R of the sheet-like member 10 are formed. The roll body 15L is formed by winding the sheet member 10 around the core tube 16L. The roll member 15R is formed by winding a sheet member 10 different from the sheet member 10 wound around the roll member 15L around the core tube 16R.

The shaft rods 17L, 17R are inserted into the core tubes 16L, 16R, respectively. The roll bodies 15L and 15R are rotatable around the axes of the shaft rods 17L and 17R.
Hanging balances 18L, 18R can be detachably attached to the shaft rods 17L, 17R. The hanging balances 18L, 18R can be suspended from the hooks 55 of the electric hoists 53L, 53R via the wires 19L, 19R. The shaft bars 17L, 17R and the roll bodies 15L, 15R can be suspended from the suspension balances 18L, 18R.

  Next, a method of laying the sheet member 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1 using the sheet member laying device 25 will be described with reference to FIGS.

  First, similarly to the above-described first embodiment, the sheet-like member laying device 25 is arranged so that the planned place where the sheet-like member 10 is to be laid falls within the above-mentioned intervals L1 and L2 (see FIG. 4). At this time, the rail 32 is laid on the bottom surface 1b of the tunnel 1 so that the rail 32 is not located immediately below the overhang frame portion 40. Also, at this time, the plurality of jacks provided at the lower end of the gantry 30 are extended and abut on the bottom surface 1b of the tunnel 1 to support the gantry 30 on the bottom surface 1b of the tunnel 1, thereby moving the gantry 30. Restrict.

Next, as shown in FIG. 11A, the electric hoist 53L is arranged at the left end of the rail 52, while the electric hoist 53R is arranged at the right end of the rail 52.
Next, the wire 54 is fed out from the electric winch of each of the electric hoists 53L and 53R along the inner peripheral surface 1a of the tunnel 1. At this time, the wire 54 is fed downward so as to pass through the gap between the scaffolds 63 and 64 and the inner peripheral surface 1a of the tunnel 1 (that is, to avoid obstacles such as the scaffolds 63 and 64). .

  Next, a pair of roll bodies 15L shown in FIG. 10A is placed on the inner peripheral surface 1a of the tunnel 1 immediately below the overhanging frame portion 40 (on the bottom surface 1b of the tunnel 1) (FIG. 11A )reference). At this time, the end of winding of the sheet member 10 in the roll body 15L is fixed to a fixing point P on the bottom surface 1b of the tunnel 1 by an appropriate fixing means. Note that a shaft rod 17L is inserted into the core tube 16L of the roll body 15L.

Next, the shaft rod 17L is connected to the distal end (hook 55) of the wire 54 of the electric hoist 53L via the wire 19L and the suspension balance 18L.
Next, as shown in FIGS. 11A and 11B, the wire 54 is wound up by an electric winch of the electric hoist 53L, thereby rotating the roll body 15L around the axis of the shaft rod 17L, thereby forming the sheet-shaped member 10L. Is extended in the circumferential direction of the tunnel along the lower half area of the inner peripheral surface 1a of the tunnel 1. The stretched sheet member 10 is fixed to the lower half area of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while being in contact with the lower half area of the inner peripheral surface 1a of the tunnel 1.

  Next, the pair of roll bodies 15R shown in FIG. 10B is placed on the inner peripheral surface 1a of the tunnel 1 immediately below the overhanging frame portion 40 (on the bottom surface 1b of the tunnel 1) (FIG. 12C). )reference). At this time, the winding end of the sheet member 10 in the roll body 15R is fixed to a fixing point P on the bottom surface 1b of the tunnel 1 by an appropriate fixing means. In addition, the end of winding of the sheet-shaped member 10 in the roll body 15L and the end of winding of the sheet-shaped member 10 in the roll 15R are joined by heat welding to ensure water-stop between them. Note that a shaft rod 17R is inserted into the core tube 16R of the roll body 15R.

Next, the shaft 17R is connected to the distal end (hook 55) of the wire 54 of the electric hoist 53R via the wire 19R and the hanging balance 18R.
Next, as shown in FIGS. 12C and 12D, the wire 54 is wound up by the electric winch of the electric hoist 53R, thereby rotating the roll body 15R around the axis of the shaft 17R, thereby forming the sheet-shaped member 10R. Is extended in the circumferential direction of the tunnel along the lower half area of the inner peripheral surface 1a of the tunnel 1. The stretched sheet member 10 is fixed to the lower half area of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while being in contact with the lower half area of the inner peripheral surface 1a of the tunnel 1.

Next, a third embodiment of the present invention will be described with reference to FIG.
FIG. 13 is a diagram illustrating a method of laying the sheet member 10 in the present embodiment.
The points different from the second embodiment will be described.

In the present embodiment, hanging tools 20L and 20R are used instead of the hanging balances 18L and 18R.
The suspender 20L can be detachably attached to the end of the roll of the sheet member 10 in the roll body 15L. The hanging tool 20L can be hung from the hook 55 of the electric hoist 53L via the wire 19L.
On the other hand, the hanging member 20R can be detachably attached to the end of the roll of the sheet member 10 in the roll body 15R. The hanging tool 20R can be hung from the hook 55 of the electric hoist 53R via the wire 19R.

  Here, the hanging members 20L, 20R and the wires 19L, 19R correspond to the "connection means" of the present invention, and correspond to one end of the sheet member 10 (end of winding of the sheet member 10 in the roll bodies 15L, 15R). Is connected to the distal end (hook 55) of each wire 54 of the electric hoist 53L, 53R.

  Next, a method of laying the sheet member 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1 using the sheet member laying device 25 will be described with reference to FIG.

  First, the sheet-like member laying device 25 is arranged so that the planned place where the sheet-like member 10 is to be laid falls within the aforementioned intervals L1 and L2 (see FIG. 4). At this time, the rail 32 is laid on the bottom surface 1b of the tunnel 1 so that the rail 32 is not located immediately below the overhang frame portion 40. Also, at this time, the plurality of jacks provided at the lower end of the gantry 30 are extended and abut on the bottom surface 1b of the tunnel 1 to support the gantry 30 on the bottom surface 1b of the tunnel 1, thereby moving the gantry 30. Restrict.

Next, as shown in FIG. 13A, the electric hoist 53L is arranged at the left end of the rail 52, while the electric hoist 53R is arranged at the right end of the rail 52.
Next, the wire 54 is fed out from the electric winch of each of the electric hoists 53L and 53R along the inner peripheral surface 1a of the tunnel 1. At this time, the wire 54 is fed downward so as to pass through the gap between the scaffolds 63 and 64 and the inner peripheral surface 1a of the tunnel 1 (that is, to avoid obstacles such as the scaffolds 63 and 64). .

  Next, the pair of roll bodies 15L and 15R are placed on the inner peripheral surface 1a of the tunnel 1 (on the bottom surface 1b of the tunnel 1) immediately below the overhanging frame portion 40 (see FIG. 13A). Note that shaft rods 17L, 17R are inserted into the core tubes 16L, 16R of the roll bodies 15L, 15R, respectively. Here, in the present embodiment, a support device (not shown) that supports the shaft rods 17L and 17R at both ends is installed on the bottom surface 1b of the tunnel 1 or the support device of the overhang frame portion 40. It is installed at the lower end.

  Next, one end of the sheet-like member 10 (in the roll bodies 15L, 15R) is connected to the distal end (hook 55) of each wire 54 of the electric hoist 53L, 53R via the wires 19L, 19R and the suspenders 20L, 20R. The winding end of the sheet-shaped member 10) is connected.

Next, as shown in FIGS. 13 (A) and (B), the wire 54 is wound by the electric winches of the electric hoists 53L, 53R, respectively, so that the pair of roll bodies 15L, 15R are connected to the shaft rods 17L, 17R. The sheet-like member 10 is spread in the tunnel circumferential direction along the lower half region of the inner peripheral surface 1a of the tunnel 1 while rotating about the axis. The stretched sheet member 10 is fixed to the lower half area of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while being in contact with the lower half area of the inner peripheral surface 1a of the tunnel 1.
Note that the winding start ends (the other end portions of the sheet-like members 10) of the sheet-like members 10 in the roll bodies 15L and 15R are heat-welded to each other and joined, so that the waterproofness between them is ensured. .

  In particular, according to the present embodiment, the lifting means (the electric hoists 53L and 53R) includes a hoisting means (an electric winch (not shown)) for winding up the linear member (the wire 54). One end of the sheet-shaped member 10 (the end of the rolled end of the sheet-shaped member 10 in the roll bodies 15L and 15R) is connected to the end of the linear member (wire 54) fed from the hoisting means (electric winch). Connection means (hangers 20L, 20R and wires 19L, 19R) for connecting to the distal end of the shaped member (wire 54) are provided. Thereby, with a simple configuration, the sheet-shaped member 10 can be expanded while being lifted.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
FIG. 14 is a diagram showing a schematic configuration of the expanding means in the present embodiment.
Differences from the first to third embodiments will be described.

  In the present embodiment, the electric winches 57L and 57R are installed at both left and right ends of the beam member 51. Here, the function of the "expanding means" of the present invention is realized by the beam member 51 and the electric winches 57L and 57R. Further, the functions of the "lifting means" and the "hoisting means" of the present invention are realized by the electric winches 57L and 57R.

  The sheet-like member 10 including the electric winches 57L and 57R is used to lay the sheet-like member 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1 as in the first to third embodiments. It goes without saying that it can be laid.

Next, a fifth embodiment of the present invention will be described with reference to FIGS.
FIG. 15 is a diagram showing a schematic configuration of the expanding means in the present embodiment. FIG. 16 is a perspective view of the roll body 15 of the sheet-like member 10 in the present embodiment. FIG. 17 is a diagram illustrating a method of laying the sheet member 10 in the present embodiment.
The differences from the first embodiment will be described.

  In the present embodiment, the overhanging frame portion 40 includes a pair of left and right pillar members 41, 41, a pair of left and right beam members 44, 44, and a beam member 45 provided between the face-side ends of the beam members 44, 44. And beam members (not shown) provided between the pit-side ends of the beam members 44, 44.

Telha 50 is provided on the beam members 44, 44. The Telha 50 can function as the “expanding means” of the present invention, and can extend the sheet-like member 10 in the circumferential direction of the tunnel 1 along the lower half area of the inner peripheral surface 1 a of the tunnel 1. .
The Telha 50 includes a beam member 51 extending in the tunnel width direction, a rail 52 extending in the tunnel width direction, and an electric hoist 53.

  The electric hoist 53 is movable in the tunnel width direction along the rail 52 and the beam member 51 while being suspended from the rail 52. In the present embodiment, when the sheet member 10 is laid in the lower half area of the inner peripheral surface 1a of the tunnel 1, the electric hoist 53 is moved from the left end to the right end of the rail 52. When the sheet member 10 is laid in the lower half region of the inner peripheral surface 1a of the tunnel 1, it is needless to say that the electric hoist 53 may be moved from the right end to the left end of the rail 52. . This applies to a sixth embodiment of the present invention described later.

  Here, Telha 50 functions as the “expansion means” of the present invention. The electric hoist 53 functions as the “lifting means” of the present invention. In the present embodiment, the electric hoist 53 can be located in one of the left area and the right area in the internal space 4 of the tunnel 1.

The electric hoist 53 includes an electric winch (not shown). This electric winch winds up the wire 54. A hook 55 is provided at the tip of the wire 54 fed from the electric winch.
Here, in the present embodiment, the electric winch provided in the electric hoist 53 functions as the "hoisting means" of the present invention. Further, the wire 54 can correspond to the “linear member” of the present invention.

As shown in FIG. 16, in the present embodiment, a roll body 15 of the sheet-shaped member 10 is formed prior to laying the sheet-shaped member 10 in the lower half region of the inner peripheral surface 1 a of the tunnel 1. The roll body 15 is formed by winding the sheet member 10 around the core tube 16.
A shaft rod 17 is inserted into the core tube 16. The roll body 15 is rotatable around the axis of the shaft 17.

A hanging balance 18 can be detachably attached to the shaft 17. The hanging balance 18 can be suspended from the hook 55 of the electric hoist 53 via the wire 19. The shaft bar 17 and the roll body 15 can be suspended from the suspension balance 18.
Here, the hanging balance 18 and the wire 19 correspond to the “connection means” of the present invention, and realize a function of connecting the shaft bar 17 to the distal end (hook 55) of the wire 54 of the electric hoist 53.

  Next, a method of laying the sheet member 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1 using the sheet member laying device 25 will be described with reference to FIG.

  First, the sheet-like member laying device 25 is arranged so that the place where the sheet-like member 10 is to be laid is located immediately below the Telha 50. At this time, the rail 32 is laid on the bottom surface 1b of the tunnel 1 so that the rail 32 is not located immediately below the overhang frame portion 40. Also, at this time, the plurality of jacks provided at the lower end of the gantry 30 are extended and abut on the bottom surface 1b of the tunnel 1 to support the gantry 30 on the bottom surface 1b of the tunnel 1, thereby moving the gantry 30. Restrict.

Next, as shown in FIG. 17A, the electric hoist 53 is disposed at the left end of the rail 52.
Next, the roll body 15 of the sheet-like member 10 is disposed at the left end (the center in the vertical direction) of the inner peripheral surface 1a of the tunnel 1. At this time, the winding end of the sheet member 10 in the roll body 15 is fixed to the fixing point Q on the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means. Note that a shaft 17 is inserted into the core tube 16 of the roll body 15.

Next, the shaft bar 17 is connected to the distal end (hook 55) of the wire 54 of the electric hoist 53 via the wire 19 and the hanging balance 18.
Next, as shown in FIGS. 17A and 17B, by moving the electric hoist 53 from the left side to the right side of the tunnel 1, the wire 54 is fed from the electric winch of the electric hoist 53, or By winding the wire 54 with the electric winch of the electric hoist 53, the sheet member 10 is moved along the lower half area of the inner peripheral surface 1 a of the tunnel 1 while rotating the roll body 15 around the axis of the shaft 17. Expand in the circumferential direction of the tunnel. Here, when the sheet member 10 is laid in the lower half and left half region of the inner peripheral surface 1a of the tunnel 1 (that is, when the wire 54 is drawn out from the electric winch of the electric hoist 53), the roll body 15 falls. A support means (not shown) for supporting the roll body 15 may be used in order to suppress the above. The stretched sheet member 10 is fixed to the lower half area of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while being in contact with the lower half area of the inner peripheral surface 1a of the tunnel 1.

Next, a sixth embodiment of the present invention will be described with reference to FIG.
FIG. 18 is a diagram illustrating a method of laying the sheet member 10 in the present embodiment.
The differences from the fifth embodiment will be described.

In the present embodiment, a hanging tool 20 is used instead of the hanging balance 18.
The hanging tool 20 can be detachably attached to the end of the roll of the sheet-shaped member 10 in the roll body 15. The hanging tool 20 can be hung from the hook 55 of the electric hoist 53 via the wire 19.

  Here, the hanging member 20 and the wire 19 correspond to the “connecting means” of the present invention, and the one end of the sheet member 10 (the end of the roll of the sheet member 10 at the winding end) is connected to the electric hoist 53. The function of connecting to the distal end (hook 55) of the wire 54 is realized.

  Next, a method of laying the sheet member 10 in the lower half region of the inner peripheral surface 1a of the tunnel 1 using the sheet member laying device 25 will be described with reference to FIG.

  First, the sheet-like member laying device 25 is arranged so that the place where the sheet-like member 10 is to be laid is located immediately below the Telha 50. At this time, the rail 32 is laid on the bottom surface 1b of the tunnel 1 so that the rail 32 is not located immediately below the overhang frame portion 40. Also, at this time, the plurality of jacks provided at the lower end of the gantry 30 are extended and abut on the bottom surface 1b of the tunnel 1 to support the gantry 30 on the bottom surface 1b of the tunnel 1, thereby moving the gantry 30. Restrict.

Next, as shown in FIG. 18A, the electric hoist 53 is disposed at the left end of the rail 52.
Next, the roll body 15 of the sheet-like member 10 is disposed at the left end (the center in the vertical direction) of the inner peripheral surface 1a of the tunnel 1. Note that a shaft 17 is inserted into the core tube 16 of the roll body 15. In the present embodiment, a support device (not shown) for supporting the shaft rod 17 at both ends thereof is installed at the left end (the center in the vertical direction) of the inner peripheral surface 1a of the tunnel 1.

  Next, one end of the sheet-like member 10 (the end of the winding of the sheet-like member 10 in the roll body 15) is connected to the distal end (hook 55) of the wire 54 of the electric hoist 53 via the wire 19 and the hanging member 20. Connect.

  Next, as shown in FIGS. 18A and 18B, while moving the electric hoist 53 from the left side to the right side of the tunnel 1, the wire 54 is paid out from the electric winch of the electric hoist 53, or By winding the wire 54 with the electric winch of the electric hoist 53, the sheet member 10 is moved along the lower half area of the inner peripheral surface 1 a of the tunnel 1 while rotating the roll body 15 around the axis of the shaft 17. Expand in the circumferential direction of the tunnel. The stretched sheet member 10 is fixed to the lower half area of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while being in contact with the lower half area of the inner peripheral surface 1a of the tunnel 1.

  In the above-described first to sixth embodiments, the sheet-shaped member 10 is described as having an example of a two-layer structure including the waterproof sheet 11 and the nonwoven fabric 12. It is not limited to a layered structure. For example, the sheet-like member 10 may be constituted only by the waterproof sheet 11. Alternatively, the sheet-like member 10 may be composed of only the nonwoven fabric 12.

  In the first to sixth embodiments described above, the sheet-like member laying device 25 is moved from the face to the wellhead in order to sequentially advance the sheet-like member 10 from the face to the wellhead. However, conversely, the sheet-like member laying device 25 may be moved from the wellhead side to the face side in order to sequentially advance the laying of the sheet-like members 10 from the wellhead side to the face side. In this case, the overhanging frame portion 40 provided with the extension means is provided on the gantry 30 so as to overhang in the tunnel axial direction from the gantry 30 toward the wellhead side. That is, the extension frame portion 40 provided with the extension means is provided on the gantry 30 so as to extend in the tunnel axial direction from the gantry 30 toward the rear of the gantry 30 in the moving direction (running direction).

In the above-described first to sixth embodiments, the sheet-like member laying device 25 and the method of laying the sheet-like member 10 have been described by exemplifying the construction of the tunnel 1 having a circular cross section. Needless to say, the shape is not limited to a circular shape, and may be, for example, an elliptical shape or a rectangular shape.
In the first to sixth embodiments, the NATM method is used as the method of constructing the tunnel 1. Alternatively, the sheet pile method may be used.

  The illustrated embodiments are merely illustrative of the present invention, and the present invention covers various improvements and modifications made by those skilled in the art within the scope of the claims, in addition to those directly shown by the described embodiments. It goes without saying that it includes.

Reference Signs List 1 tunnel 1a inner peripheral surface 1b bottom surface 2 steel support 3 shotcrete 3a inner peripheral surface 4 internal space 6 lining concrete 7 earth and sand 10,10-1,10-2 sheet-like members 11,11-1,11-2 Waterproof sheet 11t Extension part 12, 12-1, 12-2 Non-woven fabric 15, 15L, 15R Roll body 16, 16L, 16R Core tube 17, 17L, 17R Shaft rod 18, 18L, 18R Hanging balance 19, 19L, 19R Wire 20 , 20L, 20R Hanging tool 25 Sheet-like member laying device 30 Frame 31 Wheel 32 Rail 35 Temporary placing portion 37 Telha 37a Rail 37b Electric hoist 37c Hook 37d Wire 38 Transport basket 40 Overhanging frame portions 41, 42 Column members 43, 44, 45 Beam member 50 Telha 51 Beam member 52 Rails 53, 53L, 53R Electric hoist 54 Ear 55 Hook 57L, 57R Electric winch 61, 62 Arc-shaped step 63, 64 Scaffolding 63a, 64a Handrail

Claims (9)

A device for laying a sheet-like member in a lower half region including a bottom portion on an inner peripheral surface of a tunnel,
A platform that can move in the tunnel axis direction on the bottom of the tunnel,
A bracket provided on the gantry so as to project from the gantry in the tunnel axial direction,
An extension means supported by the bracket and capable of extending the sheet-shaped member in a tunnel circumferential direction along the lower half area;
Equipped with a,
The expanding means,
A beam member provided on the bracket and extending in a tunnel width direction;
Lifting means provided on the beam member,
With
The lifting means,
A linear member;
Hoisting means for winding up the linear member,
And a sheet-like member laying device. 2. The sheet-like member laying device according to claim 1 , wherein the lifting unit is located in at least one of a left region and a right region in the internal space of the tunnel, with the width direction of the tunnel being the left-right direction. The sheet-like member laying device according to claim 1 or 2 , wherein the lifting means is movable in a tunnel width direction along the beam member. The sheet-like member laying device according to any one of claims 1 to 3 , wherein the sheet-like member has water impermeability. The sheet-like member laying device according to any one of claims 1 to 4, wherein a sectional shape of the tunnel is a circular shape or an elliptical shape. The sheet-like member laying device according to any one of claims 1 to 5 , wherein the hoisting unit winds up the linear member fed out along the inner peripheral surface of the tunnel from the hoisting unit. The distal end portion of the linear member prior to being fed from Kimaki the means, connection means for connecting the shaft rod to be inserted into the core tube of the roll body of the sheet-like member on the distal end portion is provided The sheet-like member laying device according to any one of claims 1 to 6 . Before the tip portion of the linear member drawn out from Kimaki the means, connection means for connecting one end of said sheet-like member on the distal end portion is provided, of claims 1 to 6 The sheet-like member laying device according to any one of the above. How to laying the sheet-like member in the region of the lower half using what each of the hoisting means to both ends of a sheet-like member laying apparatus according to claim 7 before Symbol beam members are provided And
Inserting the shaft rod into each of the core tubes of the pair of roll bodies formed by winding the sheet-like member into eyeglasses,
Placing the pair of rolls on the inner peripheral surface of the tunnel below the bracket,
Unwinding the linear member from each of the hoisting means along the inner peripheral surface of the tunnel, and connecting the shaft to the distal end of the linear member via the connecting means, and
By winding up the linear member by the hoisting means, while rotating each of the pair of the roll body about the axis of the axle, the tunnel circumferential direction along the sheet-shaped member in the region of the lower half To expand,
A method for laying a sheet-like member, comprising: