JP2017133180A - Sheet-like member laying device and laying method of sheet-like member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently lay a sheet-like member in a lower half part on a tunnel inner peripheral surface.SOLUTION: A sheet-like member laying device 25 comprises a stand 30 movable in the tunnel axis direction on a bottom surface 1b of a tunnel 1, a bracket (column members 41 and 41 and beam members 44 and 44) provided on the stand 30 so as to overhang in the tunnel axis direction from the stand 30 and expansion means (telpher 50) supported by this bracket and capable of expanding a sheet-like member 10 in the tunnel circumferential direction along a lower half area in an inner peripheral surface 1a of the tunnel 1.SELECTED DRAWING: Figure 4

Description

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

  Patent Document 1 discloses a waterproof sheet tensioning device used when a waterproof sheet wound around a sheet roll is rewound and stretched on a tunnel inner wall. The waterproof sheet tensioning device includes at least a pair of rail members provided on a work carriage in an approximately arch shape along a tunnel inner wall, at least a pair of wheel members provided movably on the rail members, and the wheel members. And a shaft member that rotatably supports the sheet roll.

JP 2000-291392 A

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

  However, when constructing a mountain tunnel, the water pressure in the natural ground is high, and if the leakage of water from the natural ground into the tunnel is to be suppressed, the cross-sectional shape of the tunnel must be able to withstand the water pressure in the natural mountain. (That is, it is necessary to have a water pressure resistant cross section). Therefore, for example, a circular shape can be adopted as the cross-sectional shape of the tunnel. Further, it is necessary to lay a waterproof sheet on the inner peripheral surface of the tunnel over the entire periphery.

  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 tensioning device as disclosed in Patent Document 1, the wheels of the work carriage constituting the device are tunneled. Since it is located on the bottom surface, it has been difficult to lay a sheet-like member such as a waterproof sheet in the lower half of the inner peripheral surface of the tunnel (particularly the bottom of the inner peripheral surface of the tunnel).

  In view of such a situation, an object of the present invention is 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 device according to the present invention is a device for laying the sheet-like member in the lower half region on the inner peripheral surface of the tunnel. The sheet-like member laying device according to the present invention includes a gantry that can move in the tunnel axis direction on the bottom surface of the tunnel, a bracket that is provided on the gantry so as to protrude from the gantry in the tunnel axis direction, and a sheet-like member that is supported by the bracket. Extending means capable of extending the member in the tunnel circumferential direction along a lower half region on the inner circumferential surface of the tunnel.

  The laying method of the sheet-like member according to the present invention is a method of laying the sheet-like member in the lower half region on the inner peripheral surface of the tunnel using the aforementioned sheet-like member laying device. Here, the extension 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 hoisting means for winding up the linear member. A connecting means for connecting a shaft rod inserted into the core tube of the roll member of the sheet-like member to the distal end portion of the linear member is provided at the distal end portion of the linear member fed from the winding means. Hoisting means are provided at both ends of the beam member. The method for laying a sheet-like member according to the present invention includes inserting a shaft rod into each core tube of the pair of roll bodies formed by winding the sheet-like member into eyeglasses, and connecting the pair of roll bodies to a bracket. Place on the inner peripheral surface of the tunnel below, feed the linear member downward from each winding means along the inner peripheral surface of the tunnel, and connect the shaft rod to the tip of the linear member via the connecting means And by rolling up the linear member by each hoisting means, while rotating each of the pair of roll bodies around the axis of the shaft rod, the sheet-like member is moved along the lower half region on the inner peripheral surface of the tunnel. Extending in the circumferential direction of the tunnel.

  According to the present invention, the extension means is supported by the bracket provided so as to protrude from the gantry in the tunnel axis direction, and the extension means allows the sheet-like member to be moved along the lower half region on the inner peripheral surface of the tunnel. And extend in the tunnel circumferential direction. As a result, the sheet-like member can be laid in the lower half region of the inner peripheral surface of the tunnel at a position displaced from the gantry in the tunnel axis direction. The work 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 The expanded sectional view of the top end part of the tunnel in which the primary lining was performed in the first embodiment Side view of the sheet-like member laying device in the first embodiment. The figure which shows schematic structure of the expansion means in the said 1st Embodiment. The perspective view of a pair of roll body formed by making the sheet-like member into eyeglasses winding 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 movement method of the sheet-like member laying apparatus in the said 1st Embodiment. The perspective view of the roll body of the sheet-like member in 2nd Embodiment of this 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 schematic structure of the expansion means in 4th Embodiment of this invention. The figure which shows schematic structure of the expansion means in 5th Embodiment of this invention. The perspective view of the roll body of the sheet-like member in the said 5th 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.

Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 are diagrams illustrating 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 portion of the tunnel subjected to the primary lining.
In the present embodiment, for the sake of convenience, the description will be given below by defining up, down, left, and right as shown in FIGS. Further, in the present embodiment, the sheet-like member laying device and the sheet-like member laying method according to the present invention will be described by taking a tunnel having a circular cross-sectional shape as an example, but the cross-sectional shape of the tunnel is not limited to a circular shape. .

In this embodiment, the NATM construction method is used as a tunnel construction method.
When constructing the tunnel 1, first, as shown in FIG. 1 (A), after excavating a natural mountain into a convex semicircular shape to form the upper half region of the tunnel 1, steel support works 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 this primary lining process, as shown in FIG. 3, the steel support 2 is built at a predetermined interval in the tunnel axis direction. The steel support 2 is, for example, an H-shaped steel. Moreover, in this primary lining process, concrete is sprayed on the peripheral part including the top end part of the tunnel 1 (see FIG. 1 (A) and the shotcrete 3 shown in 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 placed in the upper half area of the tunnel 1.

  Next, as shown in FIG. 1 (B), after excavating the natural ground into a semicircular shape projecting downward to form the lower half region of the tunnel 1, the steel support works as described above Repeat the primary lining (support) with 2 and shotcrete 3. Thereby, the tunnel 1 having a circular cross-sectional shape is formed. In addition, about construction of the lower half area | region of this tunnel 1, it progresses sequentially toward a wellhead side from a face 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 placed in the lower half area of the tunnel 1.

  Next, as illustrated in FIG. 1C, the sheet-like member 10 is laid in the lower half region on the inner peripheral surface 1 a of the tunnel 1. In addition, about laying of this sheet-like member 10, it advances sequentially from the face side toward a wellhead side.

  For example, as shown in FIG. 8 described later, the sheet-like member 10 has a two-layer structure including a resin waterproof sheet 11 and a resin nonwoven fabric 12. 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 adjoining the sheet-like members 10 to each other, the end portions of the respective waterproof sheets 11 are overlapped and heat-welded (see FIG. 8C). In addition, the structure of the sheet-like member 10 is not restricted to the above-mentioned thing.

  When laying the sheet-like member 10 in the lower half region on the inner peripheral surface 1a of the tunnel 1, a sheet-like member laying device 25 shown in FIG. 4 described later is used. 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, so that the secondary covering is performed. Do the work. In addition, about the construction of the secondary lining in the area | region of the lower half of this tunnel 1, it advances sequentially from the face side to a wellhead side.

  Next, as shown in FIG. 2 (E), earth and sand 7 is backfilled in the lower half region of the tunnel 1. About the backfill of this earth and sand 7, it progresses sequentially toward the face side from a wellhead side. The earth and sand 7 to be backfilled is, for example, generated at the time of excavation formation of the tunnel 1.

Next, as shown in FIG. 2 (F), 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. About the installation of the sheet-like member 10 in the upper half area | region of this tunnel 1 and construction of a secondary lining, it advances sequentially toward a face side from a wellhead side. Here, for the installation of the sheet-like member 10 in the upper half region of the tunnel 1, for example, a waterproof sheet tensioning device as disclosed in Patent Document 1 described above can be used.
The tunnel 1 is constructed as described above.

Next, the configuration of the sheet-like member laying device 25 will be described with reference to FIGS. 4 and 5.
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 spreading means (Terha 50) constituting the sheet-like member laying device 25, and corresponds to the II cross 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 in each is omitted. Further, regarding the scaffold 63 shown in FIG. 5, both end portions in the tunnel axis direction project in the tunnel width direction and are connected to the upper end portions of the arc-shaped stepped portions 61 and 62, respectively. Omitted.

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

  The gantry 30 has a predetermined length in the tunnel axis direction, and a plurality of wheels 31 are provided at the lower ends of the front and rear ends (ends in the tunnel axis direction). These wheels 31 can roll on rails 32 laid on the bottom surface 1 b of the tunnel 1. That is, the gantry 30 can move in the tunnel axis direction via the wheels 31. Here, the rail 32 extends in a predetermined length in the tunnel axis direction. In the present embodiment, the gantry 30 can be self-propelled on the rail 32 using an electric motor (not shown) as a drive source. However, the traveling mode of the gantry 30 is not limited to this. For example, the gantry 30 uses a wire. It may be configured to be able to travel on the rail 32 by being pulled through a wire by a pulling device such as an electric winch that can be wound up or a heavy machine such as a backhoe.

  A plurality of jacks (not shown) are provided at the lower end of the gantry 30. These jacks are extended when the gantry 30 stops running (particularly when the sheet-like member 10 is laid and when the rail 32 is moved), and come into contact with the bottom surface 1 b of the tunnel 1. By supporting on 1b, the movement of the gantry 30 is limited. Further, these jacks are shortened when the gantry 30 travels and are separated from the bottom surface 1 b of the tunnel 1.

  In the upper part of the gantry 30, a temporary placement portion 35 on which a plurality of sheet-like members 10 wound in a roll shape (in other words, a roll body of the sheet-like member 10) are temporarily placed is formed. A roll body of a plurality of sheet-like members 10 is transported from the wellhead side to the temporary placement unit 35 using a Telka 37 and a transport basket 38. The Telha 37 includes a rail 37a that is provided at the top end of the tunnel 1 and extends in the tunnel axis direction, and an electric hoist 37b that can move in the tunnel axis direction along the rail 37a while being suspended from the rail 37a. Has been. A transport basket 38 is suspended from a hook 37c provided at the tip of a wire (not shown) fed out from the electric hoist 37b via a wire 37d and a hanger (not shown). The transporting car 38 has a box shape with an open top surface. A roll body of a plurality of sheet-like members 10 can be accommodated in the transport basket 38.

  The overhang frame portion 40 is provided on the mount 30 so as to protrude in the tunnel axis direction from the mount 30 toward the face side. The overhanging 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 comprises members 43, 43 and a pair of left and right beam members 44, 44 extending in the tunnel axis direction.

The column members 41 and 41 are erected at the face side end of the gantry 30. In the column members 41, 41, the lower half region functions as a column that supports the temporary placement portion 35 of the gantry 30. The end portions on the wellhead side of the beam members 43 and 43 are connected to the central portions of the column members 41 and 41 in the vertical direction. The end portions of the beam members 44, 44 are connected to the upper end portions of the column members 41, 41. The beam members 44 and 44 are located in the 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 and 41 and the beam members 44 and 44.

The face side end portions of the beam members 43 and 43 are connected to the central portion in the vertical direction of the column members 42 and 42. The face side end portions of the beam members 44 and 44 are connected to the upper end portions of the column members 42 and 42.
A predetermined distance L1 is provided between the column member 41 and the column member 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 end portions of the column members 42 and 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 end portions of the column members 41 and 41.

The beam members 44, 44 are provided with a Telha 50. The Telha 50 can function as the “stretching means” of the present invention, and can stretch the sheet-like member 10 in the circumferential direction of the tunnel 1 along the lower half region 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 and 44 with a part of the upper surface thereof in contact with the lower surface of the beam members 44 and 44.
The rail 52 is fixed to the rail 52 in a state where its upper surface is in contact with the lower surface of the beam member 51 and extends side by side with the beam member 51 in the tunnel width direction.
The beam member 51 and the rail 52 are located in the upper half region in the internal space 4 of the tunnel 1.

  The electric hoists 53 </ b> L and 53 </ b> R can move 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 on the left side of the electric hoist 53R. In this embodiment, when the sheet-like member 10 is laid in the lower half region on the inner peripheral surface 1a of the tunnel 1, the electric hoist 53L is disposed at the left end of the rail 52, while the electric hoist 53R is attached to the rail 52. It arranges at the right end of.

  Here, the electric hoists 53L and 53R function as the “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. Particularly in the present embodiment, when the sheet-like member 10 is laid in the lower half region on the inner peripheral surface 1a of the tunnel 1, the electric hoist 53L is positioned in the left region in the inner space 4 of the tunnel 1, The electric hoist 53R is positioned in the right region in the internal space 4 of the tunnel 1 (that is, the electric hoists 53L and 53R are positioned 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 that is fed out from the electric winch.
Here, in this embodiment, the electric winch provided in the electric hoists 53L and 53R functions as the “winding means” of the present invention. Further, the wire 54 may 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 and 41 and the beam members 44 and 44). Further, the beam member 51 is provided on the overhanging frame portion 40. The electric hoists 53L and 53R are provided on the beam member 51 via the rail 52.

The columnar members 41 and 42 on both the left and right sides are provided with arc-shaped stepped portions 61 and 62, respectively. Each of the arc-shaped staircase portions 61 and 62 is formed along the lower half region of the inner peripheral surface 1 a of the tunnel 1. In addition, although illustration is abbreviate | omitted, the arc-shaped staircase parts 61 and 62 are each provided with the handrail.
A predetermined distance L2 is provided in the tunnel axis direction between the arc-shaped staircase portions 61 and 62 on both the left and right sides. 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).

  Scaffolds 63 are provided so as to straddle the respective upper end portions of the arc-shaped staircase portions 61 and 62 arranged with a gap L2 in the tunnel axis direction. For example, the scaffold 63 is fixed to the column members 41 and 42 via a coupling means (not shown), or is fixed to the column members 41 and 42 via the arc-shaped stepped portions 61 and 62. Therefore, the scaffold 63 can be supported by the overhanging frame portion 40.

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

  Between the lower half region of the inner peripheral surface 1a of the tunnel 1 and the scaffolds 63 and 64, a roll body of the sheet-like member 10 (for example, roll bodies 15L and 15R of the sheet-like member 10 shown in FIG. 6 described later). ) Is stretched along the inner peripheral surface 1a of the tunnel 1, a gap is formed so that the roll body does not contact the scaffolds 63 and 64.

  The worker can go 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 staircase portions 61 and 62 and the scaffolds 63 and 64 to perform the joining operation between the sheet-like members 10 (see FIG. 8 described later) without getting on the sheet-like member 10. be able to.

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

Here, the 1st example and 2nd example of the formation method of the "glasses winding" of the sheet-like member 10 containing a pair of roll bodies 15L and 15R are demonstrated.
In the first example, the sheet-like member 10 is wound around the core tube 16L from one end side of the sheet-like member 10 to form the roll body 15L, and the sheet-like member is formed on the core tube 16R from the other end side of the sheet-like member 10. 10 is wound to form the roll body 15R, thereby forming “glasses winding” of the sheet-like member 10.

  In the second example, first, the sheet-like member 10 is wound around the core tube 16L to form the roll body 15L. Next, a sheet-like member 10 different from the sheet-like 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-like member 10 in the roll body 15L and the winding end of the sheet-like 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 thus formed.

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

  Here, the suspension balances 18L and 18R and the wires 19L and 19R correspond to the “connecting means” of the present invention, and the shaft rods 17L and 17R are connected to the distal ends (hooks 55) of the wires 54 of the electric hoists 53L and 53R. Realize the function to connect to.

Next, a method of laying the sheet-like member 10 in the lower half region on the inner peripheral surface 1a of the tunnel 1 using the sheet-like member laying device 25 is described in addition to the above-described FIGS. Will be described.
FIG. 7 shows a method of laying the sheet-like member 10 in the present embodiment.

  First, the sheet-like member laying device 25 is arranged so that the planned laying place of the sheet-like member 10 enters the above-described intervals L1 and L2 (see FIG. 4). At this time, the rail 32 is laid on the bottom surface 1 b of the tunnel 1 so that the rail 32 is not located directly below the overhanging frame portion 40. Further, at this time, the plurality of jacks provided at the lower end of the gantry 30 are extended to contact the bottom surface 1 b of the tunnel 1, and the gantry 30 is supported on the bottom surface 1 b of the tunnel 1, thereby moving the gantry 30. Limit.

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 downward along the inner peripheral surface 1a of the tunnel 1 from the electric winches of the electric hoists 53L and 53R. At this time, the wire 54 is drawn 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, so as to avoid obstacles such as the scaffolds 63 and 64). .

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

Next, the shaft rods 17L and 17R are connected to the tips (hooks 55) of the wires 54 of the electric hoists 53L and 53R via the wires 19L and 19R and the suspension balances 18L and 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 turned into the shaft rods 17L and 17R. The sheet-like member 10 is expanded in the circumferential direction of the tunnel along the lower half region of the inner peripheral surface 1a of the tunnel 1 while being rotated around the axis. The stretched sheet-like member 10 is fixed to the lower half region of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while in contact with the lower half region of the inner peripheral surface 1a of the tunnel 1.

FIG. 8 is a diagram illustrating a method of joining the 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 newly laid. A joining method with the sheet-like member 10-2 (see FIG. 8B) will be described. Here, both the sheet-like members 10-1 and 10-2 have the same configuration as the above-described sheet-like member 10. That is, the sheet-like member 10-1 is comprised by the waterproof sheet 11-1 and the nonwoven fabric 12-1. Moreover, the sheet-like member 10-2 is comprised with the waterproof sheet 11-2 and the nonwoven fabric 12-2.

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

Next, as shown in FIG. 8C, the waterproof sheet 11-1 is formed by bringing the extension part 11t of the waterproof sheet 11-2 into surface contact with the edge of the waterproof sheet 11-1 and heat-welding each other. 11-2 are joined together. Thus, in the state which secured the watertightness between the sheet-like members 10-1 and 10-2 by joining the sheet-like members 10-1 and 10-2 to each other, 10-2 can be integrated. In addition, about the joining method of sheet-like member 10-1, 10-2, it is not restricted to the form shown in FIG.
About the operation | work which joins sheet-like members 10-1 and 10-2, an operator does not get on sheet-like members 10-1 and 10-2, and an operator is arc-shaped staircase parts 61 and 62 and a scaffold. Work can be performed from 63,64.

FIG. 9 is a diagram illustrating a moving method of 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 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. At the time of this movement, the sheet-like member laying device 25 is moved so that a new laying-out place of the sheet-like member 10 enters the above-described intervals L1 and L2 (see FIG. 4). At the time of this movement, a plurality of jacks provided at the lower end of the gantry 30 are shortened and separated from the bottom surface 1 b of the tunnel 1. When this movement is completed, the jack is extended. As a result, 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 limited.

Next, as shown in FIG. 9C, the rail 32 is removed from the bottom surface 1b of the tunnel 1 and the rail 32 is moved to the wellhead side so that the rail 32 is not positioned directly below the overhanging frame portion 40. To do. The Telha 50 may be used to remove the rail 32. For the movement of the rail 32, a traction device such as an electric winch capable of winding a wire may be used. Moreover, this 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 1 b of the tunnel 1.

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

  According to this embodiment, the sheet-like member laying device 25 is a device that lays the sheet-like member 10 in the lower half region of the inner peripheral surface 1 a of the tunnel 1. The sheet-like member laying device 25 includes a gantry 30 that can move in the tunnel axis direction on the bottom surface 1b of the tunnel 1, and brackets (column members 41 and 41 provided on the gantry 30 so as to project from the gantry 30 in the tunnel axis direction. And the beam members 44 and 44) and the bracket (the column members 41 and 41 and the beam members 44 and 44), the sheet-like member 10 is guided along the lower half region of the inner peripheral surface 1a of the tunnel 1 in the tunnel circumferential direction. And a stretching means (Terha 50) that can be stretched. As a result, 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 pedestal 30 in the tunnel axis direction. The rail 32 does not get in the way, and as a result, the operation can be performed efficiently.

  Further, according to the present embodiment, the extension means (Telha 50) is provided on the beam member 51 provided on the bracket (the column members 41 and 41 and the beam members 44 and 44) and extending in the tunnel width direction. Provided lifting means (electric hoists 53L, 53R). As a result, the extension means can have a simple configuration.

  Further, according to the present embodiment, the lifting means (electric hoists 53L and 53R) are positioned in at least one of the left region and the right region in the internal space 4 of the tunnel 1 with the tunnel width direction as the left-right direction. In other words, in the present embodiment, the lifting means (electric hoists 53L and 53R) are arranged at a position 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 projecting frame portion 40 on the outer side 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 (electric hoists 53L and 53R) are movable along the beam member 51 in the tunnel width direction. Thereby, the installation position of the lifting means can be set to an arbitrary position in the tunnel width direction.

  Further, according to the present embodiment, the lifting means (electric hoists 53L and 53R) includes hoisting means (electric winch (not shown)) for winding the linear member (wire 54). Axial rods 17L, 17R inserted into the core tubes 16L, 16R of the roll bodies 15L, 15R of the sheet-like member 10 are provided at the distal end portion of the linear member (wire 54) fed out from the hoisting means (electric winch). Connection means (suspending balances 18L, 18R and wires 19L, 19R) for connecting to the tip of the linear member (wire 54) are provided. Thereby, the sheet-like member 10 can be extended by lifting the roll bodies 15L and 15R of the sheet-like member 10 with a simple configuration.

  Further, according to the present embodiment, the hoisting means (electric winch) of the lifting means (electric hoists 53L, 53R) is a line fed along the inner peripheral surface 1a of the tunnel 1 from the hoisting means (electric winch). The cylindrical member (wire 54) is wound up. Thereby, the roll bodies 15L and 15R of the sheet-like 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.

  Moreover, according to this embodiment, the sheet-like member 10 has water impermeability. Therefore, by laying the sheet-like member 10 in the lower half region on 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.

  Further, 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 and 53R) at both ends of the beam member 51, respectively. As a method of laying the sheet-like member 10 in the lower half region on the inner peripheral surface 1a of the tunnel 1, each core of a pair of roll bodies 15L, 15R formed by winding the sheet-like member 10 into eyeglasses is used. Inserting the shaft rods 17L, 17R into the pipes 16L, 16R (see FIG. 6), the pair of roll bodies 15L, 15R are placed inside the tunnel 1 below the brackets (column members 41, 41 and beam members 44, 44). Place it on the peripheral surface 1a (see FIG. 7A), feed the linear member (wire 54) downward along the inner peripheral surface 1a of the tunnel 1 from each hoisting means (electric winch), Condition The rods 17L, 17R are connected to the tip of the material (wire 54) via connecting means (suspending balances 18L, 18R and wires 19L, 19R), and linear members (electric winches) are connected to the linear members (electric winch). By winding the wire 54), the pair of roll bodies 15L and 15R are rotated about the axis of the shaft rods 17L and 17R, and the sheet-like member 10 is moved along the lower half region on the inner peripheral surface 1a of the tunnel 1. Extending in the tunnel circumferential direction. Thereby, since the sheet-like member 10 can be continuously laid in the lower half region of the inner peripheral surface 1a of the tunnel 1 in the tunnel circumferential direction, the sheet-like member 10 can be efficiently laid. it can.

Next, a second embodiment of the present invention will be described with reference to FIGS.
10A and 10B are perspective views of the roll bodies 15L and 15R of the sheet-like member 10 in the present embodiment. FIG.11 and FIG.12 is a figure which shows the laying method of the sheet-like member 10 in this embodiment.
Differences from the first embodiment will be described.

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

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

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

  First, similarly to the first embodiment described above, the sheet-like member laying device 25 is arranged so that the planned laying place of the sheet-like member 10 is within the aforementioned intervals L1, L2 (see FIG. 4). At this time, the rail 32 is laid on the bottom surface 1 b of the tunnel 1 so that the rail 32 is not located directly below the overhanging frame portion 40. Further, at this time, the plurality of jacks provided at the lower end of the gantry 30 are extended to contact the bottom surface 1 b of the tunnel 1, and the gantry 30 is supported on the bottom surface 1 b of the tunnel 1, thereby moving the gantry 30. Limit.

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 downward along the inner peripheral surface 1a of the tunnel 1 from the electric winches of the electric hoists 53L and 53R. At this time, the wire 54 is drawn 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, so as to avoid obstacles such as the scaffolds 63 and 64). .

  Next, the pair of roll bodies 15L shown in FIG. 10A is placed on the inner peripheral surface 1a (on the bottom surface 1b of the tunnel 1) of the tunnel 1 immediately below the overhanging frame portion 40 (FIG. 11A). )reference). At this time, the winding end of the sheet-like member 10 in the roll body 15L is fixed to the fixing point P on the bottom surface 1b of the tunnel 1 by an appropriate fixing means. 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 tip (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. 11 (A) and 11 (B), the wire 54 is wound up by the electric winch of the electric hoist 53L, thereby rotating the roll body 15L around the axis of the shaft rod 17L, while the sheet-like member 10 is rotated. Is expanded in the tunnel circumferential direction along the lower half region of the inner peripheral surface 1a of the tunnel 1. The stretched sheet-like member 10 is fixed to the lower half region of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while in contact with the lower half region 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 (on the bottom surface 1b of the tunnel 1) of the tunnel 1 immediately below the overhanging frame portion 40 (FIG. 12C )reference). At this time, the winding end of the sheet-like member 10 in the roll body 15R is fixed to the fixing point P on the bottom surface 1b of the tunnel 1 by an appropriate fixing means. Moreover, the water stop property between mutually is ensured by heat-welding and joining the winding end end of the sheet-like member 10 in the roll body 15L and the winding end end of the sheet-like member 10 in the roll body 15R. A shaft rod 17R is inserted into the core tube 16R of the roll body 15R.

Next, the shaft rod 17R is connected to the tip end portion (hook 55) of the wire 54 of the electric hoist 53R via the wire 19R and the suspension balance 18R.
Next, as shown in FIGS. 12C and 12D, the sheet member 10 is rotated while the roll body 15R is rotated around the axis of the shaft rod 17R by winding the wire 54 with the electric winch of the electric hoist 53R. Is expanded in the tunnel circumferential direction along the lower half region of the inner peripheral surface 1a of the tunnel 1. The stretched sheet-like member 10 is fixed to the lower half region of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while in contact with the lower half region 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-like member 10 in the present embodiment.
Differences from the second embodiment will be described.

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

  Here, the suspending tools 20L, 20R and the wires 19L, 19R correspond to the “connecting means” of the present invention, and one end portion of the sheet-like member 10 (the winding end end portion of the sheet-like member 10 in the roll bodies 15L, 15R). Is connected to the tip (hook 55) of the wire 54 of each of the electric hoists 53L and 53R.

  Next, a method of laying the sheet-like member 10 in the lower half region on the inner peripheral surface 1a of the tunnel 1 using the sheet-like 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 laying place of the sheet-like member 10 enters the above-described intervals L1 and L2 (see FIG. 4). At this time, the rail 32 is laid on the bottom surface 1 b of the tunnel 1 so that the rail 32 is not located directly below the overhanging frame portion 40. Further, at this time, the plurality of jacks provided at the lower end of the gantry 30 are extended to contact the bottom surface 1 b of the tunnel 1, and the gantry 30 is supported on the bottom surface 1 b of the tunnel 1, thereby moving the gantry 30. Limit.

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 downward along the inner peripheral surface 1a of the tunnel 1 from the electric winches of the electric hoists 53L and 53R. At this time, the wire 54 is drawn 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, so as 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 (on the bottom surface 1b of the tunnel 1) of the tunnel 1 immediately below the overhanging frame portion 40 (see FIG. 13A). In addition, shaft rods 17L and 17R are inserted into the core tubes 16L and 16R of the roll bodies 15L and 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 It is installed at the lower end.

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

Next, as shown in FIGS. 13A and 13B, 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 turned into the shaft rods 17L and 17R. The sheet-like member 10 is expanded in the circumferential direction of the tunnel along the lower half region of the inner peripheral surface 1a of the tunnel 1 while being rotated around the axis. The stretched sheet-like member 10 is fixed to the lower half region of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while in contact with the lower half region of the inner peripheral surface 1a of the tunnel 1.
In addition, the winding start end part (the other end part of the sheet-like member 10) of the sheet-like member 10 in the roll bodies 15L and 15R is heat-welded to each other to be bonded to each other, thereby ensuring water-tightness between them. .

  In particular, according to the present embodiment, the lifting means (electric hoists 53L and 53R) include hoisting means (electric winch (not shown)) for winding the linear member (wire 54). One end of the sheet-like member 10 (the end of winding of the sheet-like member 10 in the roll bodies 15L and 15R) is connected to the tip of the linear member (wire 54) fed out from the hoisting means (electric winch). Connection means (hanging tools 20L, 20R and wires 19L, 19R) for connecting to the tip of the shaped member (wire 54) are provided. Thereby, it is possible to spread the sheet-like member 10 while lifting it with a simple configuration.

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 stretching 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 “expansion 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 “lifting means” of the present invention are realized by the electric winches 57L and 57R.

  The sheet-like member laying device 25 including the electric winches 57L and 57R is used to place the sheet-like member 10 in the lower half region on 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 stretching 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-like member 10 in the present embodiment.
Differences from the first embodiment will be described.

  In the present embodiment, the overhang frame portion 40 includes a pair of left and right column members 41, 41, a pair of left and right beam members 44, 44, and a beam member 45 provided between the face side end portions of the beam members 44, 44. And a beam member (not shown) provided between the end portions on the wellhead side of the beam members 44 and 44.

The beam members 44, 44 are provided with a Telha 50. The Telha 50 can function as the “stretching means” of the present invention, and can stretch the sheet-like member 10 in the circumferential direction of the tunnel 1 along the lower half region of the inner peripheral surface 1 a of the tunnel 1. .
The Telha 50 includes a beam member 51 that extends in the tunnel width direction, a rail 52 that extends 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-like member 10 is laid in the lower half region on the inner peripheral surface 1 a of the tunnel 1, the electric hoist 53 is moved from the left end portion of the rail 52 to the right end portion. Needless to say, when the sheet-like member 10 is laid in the lower half region of the inner peripheral surface 1 a of the tunnel 1, the electric hoist 53 may be moved from the right end to the left end of the rail 52. . This is the same in the sixth embodiment of the present invention described later.

  Here, the Telha 50 functions as the “stretching 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 either the left region or the right region 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 that is fed out from the electric winch.
Here, in the present embodiment, the electric winch provided in the electric hoist 53 functions as the “winding means” of the present invention. Further, the wire 54 may correspond to the “linear member” of the present invention.

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

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

  Next, a method of laying the sheet-like member 10 in the lower half region on the inner peripheral surface 1a of the tunnel 1 using the sheet-like 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 laying position of the sheet-like member 10 is located directly under the Telha 50. At this time, the rail 32 is laid on the bottom surface 1 b of the tunnel 1 so that the rail 32 is not located directly below the overhanging frame portion 40. Further, at this time, the plurality of jacks provided at the lower end of the gantry 30 are extended to contact the bottom surface 1 b of the tunnel 1, and the gantry 30 is supported on the bottom surface 1 b of the tunnel 1, thereby moving the gantry 30. Limit.

Next, as shown in FIG. 17A, the electric hoist 53 is disposed at the left end portion of the rail 52.
Next, the roll body 15 of the sheet-like member 10 is disposed at the left end portion (vertical center portion) of the inner peripheral surface 1 a of the tunnel 1. At this time, the winding end of the sheet-like 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. A shaft rod 17 is inserted into the core tube 16 of the roll body 15.

Next, the shaft rod 17 is connected to the tip end portion (hook 55) of the wire 54 of the electric hoist 53 via the wire 19 and the suspension 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 while feeding the wire 54 out of 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-like member 10 is moved along the lower half region on the inner peripheral surface 1 a of the tunnel 1 while rotating the roll body 15 around the axis of the shaft rod 17. It extends in the tunnel circumferential direction. Here, when the sheet-like member 10 is laid in the lower half and left half of the inner peripheral surface 1a of the tunnel 1 (that is, when the wire 54 is fed out from the electric winch of the electric hoist 53), the roll body 15 falls. In order to suppress this, a support means (not shown) for supporting the roll body 15 can be used. The stretched sheet-like member 10 is fixed to the lower half region of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while in contact with the lower half region 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-like member 10 in the present embodiment.
Differences from the fifth embodiment will be described.

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

  Here, the hanger 20 and the wire 19 correspond to the “connecting means” of the present invention, and one end of the sheet-like member 10 (the end of winding of the sheet-like member 10 in the roll body 15) is connected to the electric hoist 53. The function of connecting to the tip (hook 55) of the wire 54 is realized.

  Next, a method of laying the sheet-like member 10 in the lower half region on the inner peripheral surface 1a of the tunnel 1 using the sheet-like 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 laying position of the sheet-like member 10 is located directly under the Telha 50. At this time, the rail 32 is laid on the bottom surface 1 b of the tunnel 1 so that the rail 32 is not located directly below the overhanging frame portion 40. Further, at this time, the plurality of jacks provided at the lower end of the gantry 30 are extended to contact the bottom surface 1 b of the tunnel 1, and the gantry 30 is supported on the bottom surface 1 b of the tunnel 1, thereby moving the gantry 30. Limit.

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 portion (vertical center portion) of the inner peripheral surface 1 a of the tunnel 1. A shaft rod 17 is inserted into the core tube 16 of the roll body 15. Further, in the present embodiment, a support device (not shown) that supports the shaft rod 17 at both ends thereof is installed at the left end portion (vertical center portion) of the inner peripheral surface 1a of the tunnel 1.

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

  Next, as shown in FIGS. 18A and 18B, by moving the electric hoist 53 from the left side to the right side of the tunnel 1 while feeding the wire 54 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-like member 10 is moved along the lower half region on the inner peripheral surface 1 a of the tunnel 1 while rotating the roll body 15 around the axis of the shaft rod 17. It extends in the tunnel circumferential direction. The stretched sheet-like member 10 is fixed to the lower half region of the inner peripheral surface 1a of the tunnel 1 by an appropriate fixing means while in contact with the lower half region of the inner peripheral surface 1a of the tunnel 1.

  In the first to sixth embodiments described above, the sheet-like member 10 has been described as an example of the two-layer structure constituted by the waterproof sheet 11 and the nonwoven fabric 12. It is not limited to a layer structure. For example, the sheet-like member 10 may be composed only of the waterproof sheet 11. Or the sheet-like member 10 may be comprised only with the nonwoven fabric 12. FIG.

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

In the first to sixth embodiments described above, the sheet-like member laying device 25 and the method of laying the sheet-like member 10 have been described by taking the construction of the tunnel 1 having a circular cross-section as an example. Needless to say, the shape is not limited to a circular shape, and may be, for example, an elliptical shape or a rectangular shape.
Moreover, in the above-mentioned 1st-6th embodiment, although the NATM construction method is used as a construction method of the tunnel 1, you may use a sheet pile construction method in addition to this.

  The illustrated embodiments are merely examples of the present invention, and the present invention includes various improvements and modifications made by those skilled in the art within the scope of the claims in addition to those directly illustrated by the described embodiments. Needless to say, it is included.

DESCRIPTION OF SYMBOLS 1 Tunnel 1a Inner peripheral surface 1b Bottom surface 2 Steel support 3 Sprayed concrete 3a Inner peripheral surface 4 Internal space 6 Covering concrete 7 Earth and sand 10, 10-1, 10-2 Sheet-like member 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 Axle rod 18, 18L, 18R Suspension balance 19, 19L, 19R Wire 20 , 20L, 20R Suspension tool 25 Sheet-like member laying device 30 Mounting base 31 Wheel 32 Rail 35 Temporary placement part 37 Teruha 37a Rail 37b Electric hoist 37c Hook 37d Wire 38 Carriage basket 40 Overhang frame part 41, 42 Pillar members 43, 44, 45 Beam member 50 Telha 51 Beam member 52 Rail 53, 53L, 53R Electric hoist 54 Ear 55 Hook 57L, 57R Electric winch 61, 62 Arc-shaped stair part 63, 64 Scaffold 63a, 64a Handrail

Claims (10)

An apparatus for laying a sheet-like member in a lower half region on the inner peripheral surface of the 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 axis direction;
Stretching means supported by the bracket and capable of stretching the sheet-like member in the tunnel circumferential direction along the region;
A sheet-like member laying device. The spreading means is
A beam member provided in the bracket and extending in the tunnel width direction;
Lifting means provided on the beam member;
The sheet-like member laying device according to claim 1, comprising:   The sheet-like member laying device according to claim 2, wherein the lifting means is located in at least one of a left region and a right region in the inner space of the tunnel, with a tunnel width direction as a left-right direction.   The sheet-like member laying device according to claim 2 or 3, wherein the beam member is located in an upper half region in the internal space of the tunnel.   The sheet-like member laying device according to any one of claims 2 to 4, wherein the lifting means is movable in the tunnel width direction along the beam member. The lifting means includes hoisting means for winding up the linear member,
Connection means for connecting a shaft rod inserted into the core tube of the roll member of the sheet-like member to the tip part is provided at the tip part of the linear member fed out from the hoisting means. The sheet-like member laying device according to any one of claims 2 to 5. The lifting means includes hoisting means for winding up the linear member,
The connection means for connecting the one end part of the said sheet-like member to the said front-end | tip part is provided in the front-end | tip part of the said linear member drawn | fed out from the said winding means. The sheet-like member laying device according to claim 1.   The sheet-like member laying device according to claim 6 or 7, wherein the hoisting means winds up the linear member fed from the hoisting means along a tunnel inner peripheral surface.   The sheet-like member laying device according to any one of claims 1 to 8, wherein the sheet-like member has water impermeability. The sheet-like member laying device according to claim 6, wherein the hoisting means is provided at both ends of the beam member, and the sheet-like member is laid in a lower half region on the inner peripheral surface of the tunnel. A method of laying a member,
Inserting the shaft rod into the core tube of each of the pair of roll bodies formed by winding the sheet-like member into glasses;
Placing the pair of roll bodies on a tunnel inner peripheral surface below the bracket;
Extending the linear member downward from the winding means along the inner peripheral surface of the tunnel, and connecting the shaft rod to the tip of the linear member via the connecting means; and
By winding up the linear member by the hoisting means, the sheet member is moved along the lower half region of the inner peripheral surface of the tunnel while rotating each of the pair of roll bodies around the axis of the shaft rod. Extending in the tunnel circumferential direction,
A method for laying a sheet-like member.