JP6579703B2 - Tarpaulin roll cradle, tarpaulin laying mechanism and laying method - Google Patents

Description

  The present invention relates to a waterproof sheet roll cradle, a waterproof sheet laying mechanism, and a laying method used when laying a waterproof sheet so as to follow, for example, a circumferential surface of a tunnel.

  Conventionally, as a method of laying a waterproof sheet on the back surface of lining concrete in a mountain tunnel, there is a method of manually fixing the waterproof sheet with a nail or the like to the sprayed concrete surface formed on the inner periphery of the tunnel. This method usually uses a waterproof sheet with a width of about 2m and a length corresponding to the tunnel circumference, and is fixed to each other while being stretched along the surface of the sprayed concrete one by one. Are connected sequentially.

  However, it is normal for the surface of shotcrete to have irregularities, and with the method of fastening with human power, it is inevitable that dripping or loosening will occur on the waterproof sheet even if it is adjusted by manual adjustment. It is difficult to lay and lay a waterproof sheet smoothly at the level. Therefore, as in Patent Document 1, the waterproof sheet is spread using a movable seat stand, and the waterproof sheet is filled and fixed between the waterproof sheet and the inner wall surface of the tunnel, and the waterproof sheet is laid smoothly. A method that can do this is also proposed.

JP 2002-21492 A

  By the way, from the viewpoint of improving the efficiency of the waterproof sheet laying work, in particular, when a waterproof sheet is laid using a sheet mount as in Patent Document 1, it is required to use a wider waterproof sheet. For example, a wide waterproof sheet such as a 10.6 m wide waterproof sheet formed by arranging 5 sheets of waterproof sheets with a nonwoven fabric with a width of 2.2 m in parallel and overlapping the ends of each sheet by welding is used. ing. Such a wide waterproof sheet is wound around a paper core tube having a diameter of 150 mm to form a waterproof sheet roll, and is transported to the site.

  Then, as shown in FIG. 10A, a steel pipe 204 serving as a shaft is passed through a paper core pipe 203 of the waterproof sheet roll 201, and both ends of the steel pipe 204 are received by bearing tools 205, from the waterproof sheet roll 201. While unwinding the wide waterproof sheet 202, the sheet is pulled up on the seat frame.

  However, in the 10.6 m wide sheet, the length of the steel pipe 204 serving as the shaft is 11 m, and if both ends are supported by the bearings 205 and 205, the steel pipe 204 itself is bent. Therefore, the sheet unwinding operation becomes very difficult. Further, as shown in FIG. 10B, the waterproof sheet roll 201 wound around the paper core tube 203 has the paper core tube 203 of the band 207 when it is hung with a lifting tool 206 by unloading or the like. By the way, the core tube 203 of the paper tube of the lower waterproof sheet roll 201 may be weakened and crushed due to moisture or the like while being folded and stored at the site. If the paper core tube 203 is bent or crushed, the steel tube 204 cannot be passed through the core tube 203, and the laying operation cannot be performed.

  As means for avoiding this problem, it is conceivable to use a special long unloading jig so that the core tube 203 of the waterproof sheet roll 201 is not bent, or to store the waterproof sheet roll 201 without being stacked. The cost of using a special unloading jig and the increase in storage cost of the waterproof sheet roll 201 deteriorate the economy, and the storage space is limited at the tunnel construction site, which is difficult in practice. Furthermore, even if the problems of economy and storage space are cleared, the problem of weakening the paper core tube 203 due to humidity remains.

  As another avoidance means, if the core tube 203 is made of high-strength plastic or the like, the problem of bending or crushing can be solved, but another problem is that the core made of plastic or the like that becomes waste It takes a lot of labor and cost to dispose of the pipe.

  The present invention is proposed in view of the above-described problems, and enables the use of a waterproof sheet roll without a core tube, and enables the waterproof sheet to be reliably laid down at low cost and high efficiency. An object is to provide a roll cradle, a waterproof sheet laying mechanism, and a laying method.

The tarpaulin roll cradle of the present invention is a tarpaulin roll cradle on which a tarpaulin roll from which a tarpaulin laid so as to substantially follow the peripheral surface of the tunnel is drawn is placed, and can rotate freely without power. A plurality of the feed rollers are spaced apart so as to form a substantially arcuate virtual slope that is concave upward and on which a waterproof sheet roll can be placed ; A rod holding portion is provided that extends in parallel with the axial direction and holds a connecting rod that connects the waterproof sheet roll pedestals to each other .
According to this, the plurality of feed rollers of the tarpaulin roll support can assist the rotation of the tarpaulin roll from the outer peripheral surface, and can assist the rotation of the tarpaulin roll with or without the core tube of the tarpaulin roll. it can. Therefore, it is possible to use a waterproof sheet roll without a core pipe when laying the waterproof sheet, and special considerations such as unloading the waterproof sheet roll and using a special instrument for preventing the core pipe from being bent during storage work are performed. At least, it is possible to reliably perform the laying work of the waterproof sheet at low cost and high efficiency. In addition, since it becomes possible to use a waterproof sheet roll without a core tube, the number of trucks can be increased by reducing the bulkiness of the waterproof sheet roll, thereby reducing the transportation cost and reducing the core tube cost. The core sheet can be bent or crushed, so that the tarpaulin roll is not wasted and work can be performed at a high yield.Furthermore, the tarpaulin roll without the core pipe is crushed into an oval shape during storage. The number of storage at the storage location can be increased by increasing the number of upper stages. Furthermore, since it becomes possible to use a waterproof sheet roll without a core tube, the disposal process of the core tube is completely unnecessary. Moreover, rotation of a wide waterproof sheet roll can be assisted by a plurality of waterproof sheet roll holders integrated by the connecting rod and the rod holding portion, and the wide waterproof sheet can be pulled out stably. Moreover, it becomes possible to adjust the installation number of the waterproof sheet roll cradles that are provided integrally and freely according to the width and weight of the waterproof sheet. Further, since the feed roller is provided with no power, adjustment work for driving synchronization is not required even if a plurality of waterproof sheet roll cradles are provided.

The waterproof sheet laying mechanism of the present invention includes a waterproof sheet base having an outer peripheral surface that substantially follows the peripheral surface of the tunnel, and one end portion in the width direction of the lower portion of the tunnel, and the shaft of the feed roller The waterproof sheet roll cradle of the present invention installed so that the direction is substantially parallel to the extension direction of the tunnel, and from the other end side in the width direction of the lower part of the tunnel to the one end side A towline that is stretched over the outer periphery of the tarpaulin base and is attached to the end of winding of the tarpaulin roll whose tip is placed on the tarpaulin roll cradle, and pulls the towline toward the other end e Bei a winch, the waterproof sheet roll cradle is provided with a space in the extending direction of the tunnel, the connecting rod is extended parallel to the axial direction of the feed roller, the inter The connecting rod at each of the rod holding portions of the plurality of the tarpaulin roll cradles are provided to open the can, characterized in that it is held.
According to this, while having the same effect as the tarpaulin roll cradle of the present invention, the tarpaulin roll is smoothly stretched so as to substantially follow the peripheral surface of the tunnel regardless of the presence or absence of the core pipe of the tarpaulin roll. can do. Moreover, rotation of a wide waterproof sheet roll can be assisted by a plurality of waterproof sheet roll holders integrated by the connecting rod and the rod holding portion, and the wide waterproof sheet can be pulled out stably. Moreover, it becomes possible to adjust the installation number of the waterproof sheet roll cradles that are provided integrally and freely according to the width and weight of the waterproof sheet. Further, since the feed roller is provided with no power, adjustment work for driving synchronization is not required even if a plurality of waterproof sheet roll cradles are provided.

The waterproof sheet laying mechanism of the present invention is characterized in that the waterproof sheet pulled out from the waterproof sheet roll placed on the waterproof sheet roll cradle is waterproofed on the one end side in the width direction of the lower part of the tunnel. A guide roller for guiding the outer periphery of the sheet mount is provided on the waterproof sheet mount .
According to this, when the waterproof sheet is drawn out from the waterproof sheet roll and guided to the outer peripheral surface side of the waterproof sheet mount, it is possible to prevent the waterproof sheet mount from contacting with the waterproof sheet and damaging the waterproof sheet. it can.

The waterproof sheet laying method of the present invention is a method of laying a waterproof sheet using the waterproof sheet laying mechanism of the present invention, wherein the waterproof sheet roll wound from the winding start end without a core tube is used. Place on the cradle, attach the tip side of the tow rope to the end of winding of the tarpaulin roll, pull the tow rope with the winch and pull out the tarpaulin from the tarpaulin roll, and the outer periphery of the tarpaulin frame It is characterized by comprising a step of extending so as to substantially follow the surface.
According to this, while having the same effect as the waterproof sheet laying mechanism of the present invention, a waterproof sheet roll without a core tube can be smoothly stretched so as to substantially follow the peripheral surface of the tunnel.

  According to the present invention, it is possible to use a waterproof sheet roll without a core tube, and it is possible to reliably perform the operation of laying the waterproof sheet at low cost and high efficiency.

The perspective view which shows the waterproof sheet roll cradle of embodiment by this invention. The side view of the state which mounted the waterproof sheet roll in the waterproof sheet roll stand of FIG. Cross-sectional explanatory drawing which shows the laying mechanism of the waterproof sheet of embodiment by this invention. The perspective explanatory view which shows the waterproof sheet roll cradle spaced apart. The front view of the waterproof sheet roll cradle spaced apart and connected with the connecting rod. Cross-sectional explanatory drawing which shows the periphery of the waterproof sheet roll stand in the laying mechanism of the waterproof sheet of embodiment. (A)-(c) is explanatory drawing which shows the construction process until driving a rock bolt to a natural ground and arrange | positioning a secondary lining formwork. Cross-sectional explanatory drawing which shows a part of waterproof sheet | seat laid with the laying mechanism of the waterproof sheet of embodiment, the filled filler, and a sheet | seat mount frame. Explanatory perspective drawing which shows the state which piled up and stored the waterproof sheet roll without a core pipe. (A) The perspective explanatory view which shows the state which is supporting the steel pipe inserted in the core pipe of the waterproof sheet roll of a prior art example with a bearing tool, (b) The state which suspended the waterproof sheet roll of the prior art example with the hoisting tool is shown. Illustration.

[The waterproof sheet roll cradle of the embodiment, the laying mechanism and laying method of the waterproof sheet]
A waterproof sheet roll cradle 1 according to an embodiment of the present invention is provided with a waterproof sheet roll 10 from which a waterproof sheet 10a is drawn. As shown in FIGS. 1 and 2, a pair of side plates 11 and 11 are provided. Have. The pair of side plates 11 and 11 have arc-shaped portions 111 and 111 formed on the upper end surfaces, respectively, and the arc-shaped portion 111 is formed such that the upper end on the front side is lower than the upper end on the back side. The pair of side plates 11 and 11 are arranged to face each other with a predetermined interval so that the heights of the arc-shaped portions 111 and 111 are equal.

  A substantially L-shaped support member 12 is provided on the front side and the back side of the pair of side plates 11 and 11 so as to bridge between the side plates 11 and 11, and both end portions are welded to the end surfaces of the side plates 11 and 11, for example. It is fixed with. Further, an elongated plate-like support member 13 is provided above the substantially L-shaped support member 12 on the front side and the back side of the pair of side plates 11 and 11 so as to bridge between the side plates 11 and 11. Both ends are fixed to the end surfaces of the side plates 11 and 11 by welding or the like.

  Support legs 14 are fixed to the lower inner surface near the front end and the lower inner surface near the rear end of the side plate 11 by welding or the like, respectively. Four support legs 14 are provided so as to protrude from the lower part.

  The support member 13 on the front side is provided with a clamp-like rod holding part 15 protruding forward, and the support member 13 on the back side is provided with a clamp-like rod holding part 15 protruding backward, The connecting rod 6 to be inserted is held by closing the substantially arc-shaped gripping part and screwing or bolting. The connecting rod 6 is used when mutually connecting a plurality of waterproof sheet roll cradles 1 arranged at intervals, and is extended in parallel with the axial direction of a feed roller 16 to be described later. It is provided so as to be inserted into the portion 15, the back-side rod holding portion 15, or both the front-side and back-side rod holding portions 15 (see FIGS. 4 and 5).

  In the illustrated example, the number of the rod holding portions 15 provided on each support member 13 is two. However, the number of the rod holding portions 15 may be one or more than three. For example, a clamp-shaped rod having a wider gripping portion. A single holding unit 15 may be provided. Moreover, the rod holding part 15 is not limited to a clamp shape, and is appropriate as long as it can hold the connecting rod 6. Further, the rod holding portion 15 may be configured to be provided only on one of the front side or the back side of the waterproof sheet roll cradle 1.

  Between the pair of side plates 11, 11, a plurality of feed rollers 16 are rotatably supported by non-power and are provided in parallel with a space therebetween. A configuration in which the shaft end portion of the feed roller 16 is rotatably supported by the side plate 11 is appropriate. For example, the shaft end portion is fitted in a bottomed recess formed on the inner surface of the side plate 11 or a through hole formed in the side plate 11. The shaft end portion is inserted through the shaft plate, or the shaft end portion is inserted into a through-hole formed in the side plate 11, and an annular member such as a nut is fixed to the outer periphery of the shaft end portion outside the side plate 11, etc. Is possible.

  The plurality of feed rollers 16 can be placed with a waterproof sheet roll and are spaced apart so as to form a concave substantially arcuate virtual slope upward, and a part of each feed roller 16 is a pair of side plates 11, 11. Are provided so as to protrude inward from the arc-shaped portions 111. By supporting the waterproof sheet roll 10 placed at the protruding portion of each feed roller 16, the placed waterproof sheet roll 10 does not come into contact with the side plates 11.

  When the laying mechanism of the waterproof sheet 10a is configured using the above-described waterproof sheet roll cradle 1, as shown in FIGS. 3 and 6, for example, the waterproof sheet roll cradle 1, the waterproof sheet base 2, the tow rope 3, It comprises a winch 4 and a guide roller 5. In this example, rock bolts 103 are radially radiated from the tunnel excavation surface to the ground 101, and the shotcrete 102 is provided on the inner side so as to cover the tunnel excavation surface. This is a laying mechanism when the waterproof sheet 10a is spread and laid.

  In this laying mechanism, the outer peripheral surface of the waterproof sheet base 2 having an outer peripheral surface that substantially follows the peripheral surface of the tunnel is disposed so as to be separated from the inner peripheral surface of the shotcrete 102, and further the outer peripheral surface of the waterproof sheet base 2 Is arranged so as to substantially follow the inner peripheral surface of the shotcrete 102. The waterproof sheet base 2 is supported by an inner base support frame 21 and a base support leg 22.

  The waterproof sheet roll cradle 1 is provided in the vicinity of one end in the width direction of the lower part of the tunnel, and is installed so that the axial direction of the feed roller 16 is substantially parallel to the extending direction of the tunnel. In this example, a plurality of tarpaulin roll holders 1 are provided at intervals in the tunnel extension direction, and a single integral tubular or rod-like connecting rod 6 extends in parallel with the axial direction of the feed roller. And the connecting rod 6 is hold | maintained by each of the rod holding | maintenance part 15 of the front side of the some waterproof sheet roll cradle 1 (refer FIG. 4, FIG. 5). The length of the connecting rod 6 can be appropriately adjusted in accordance with the number and interval of the waterproof sheet roll cradle 1 installed with a gap in the tunnel extending direction.

  The tow rope 3 is provided so as to be bridged on the outer periphery of the waterproof sheet mount 1 from the other end side in the width direction of the lower part of the tunnel to the one end side where the waterproof sheet roll cradle 1 is disposed. The tip side is attached to the end of winding of the waterproof sheet roll 10 placed on the waterproof sheet roll cradle 1. The structure for attaching the tip side of the tow rope 3 is appropriate as long as the structure can be attached so that the waterproof sheet 10a can be pulled without damaging it. For example, as shown in FIG. 4, an attachment for holding the winding end of the waterproof sheet 10a. It is also possible to attach via 31 and attach the attachment 31 so as to sandwich the winding end, and tow the attachment 31 with the tow rope 3 branched at the tip. Note that the tow rope 3 is appropriate as long as it can be pulled to pull out the waterproof sheet 10a from the waterproof sheet roll 10, and can be, for example, a wire, a chain, a rope, or a belt having a required strength. It is.

  The base end side of the tow rope 3 is attached to the winch 4 disposed on the other end side in the width direction of the lower part of the tunnel, and is driven across the outer periphery of the waterproof sheet base 1 by driving the winch 4. It is possible to pull the pulling rope 3 on the other end side and pull the waterproof sheet 10a attached to the tip end side of the pulling rope 3 to the other end side. By pulling the waterproof sheet 10a by the winch 4 and the tow rope 3, the waterproof sheet roll 10 rotates on the feed roller 16 of the waterproof sheet roll cradle 1 with the assistance of the rotation of the feed roller 16, and the waterproof sheet 10a is pulled out smoothly. To go.

  Furthermore, in the laying mechanism of the present example, the waterproof sheet 10a pulled out from the waterproof sheet roll 10 placed on the waterproof sheet roll cradle 1 is attached to the waterproof sheet base 2 on one end side in the width direction of the lower part of the tunnel. A guide roller 5 is provided for guiding to the outer peripheral surface side. The guide roller 5 is rotatably provided in accordance with the movement of the waterproof sheet 10a at a position below the outer peripheral surface of the waterproof sheet base 2 at a position separated from the waterproof sheet roll cradle 1, and in the illustrated example, the waterproof sheet base 2 It is pivotally supported by a support that is fixed to the frame.

  In addition, the waterproof sheet roll 10 from which the waterproof sheet 10a in the illustrated example is drawn has no core tube, and the waterproof sheet 10a is wound from the winding start end to the winding end end. Moreover, the waterproof sheet 10a of this example is formed by laminating a waterproof sheet main body and a nonwoven fabric, and the width thereof is, for example, 10.6 m corresponding to the width of the waterproof sheet base 2. The waterproof sheet 10a is drawn from the waterproof sheet roll 10 so that the nonwoven fabric side is the tunnel excavation surface side or the shotcrete 102 side. It is extended to be on the side.

  The waterproof sheet roll 10 of this example does not need to be managed so that the core pipe is not crushed because there is no core pipe, and the waterproof sheet roll 10 is flat when stacked in a storage place as shown in FIG. Therefore, the height and volume when stacked are reduced. Further, since the waterproof tube 10a having the same length is made into a roll using the core tube, the volume of each waterproof sheet roll 10 can be reduced by the amount of the core tube.

  Next, a description will be given of a process example in which the waterproof sheet 10a is stretched, fixed and laid by the laying mechanism. First, as shown to Fig.7 (a), while providing the shot concrete 102 inside so that a tunnel excavation surface may be covered, the rock bolt 103 is radiated | placed radially to the natural ground 101 from the shot concrete surface. Thereafter, as shown in FIGS. 3 to 6, a plurality of waterproof sheet roll cradle 1 are connected and connected by a connecting rod 6, and the winding start end without a core tube is placed on the feed roller 16 of the waterproof sheet roll cradle 1. The waterproof sheet roll 10 wound from the side is placed, and the waterproof sheet base 2, the tow rope 3, the winch 4, and the guide roller 5 are arranged, and the leading end side of the tow rope 3 is attached to the end of winding of the waterproof sheet roll 10. . Then, the winch 4 is driven to pull the tow rope 3 to pull out the waterproof sheet 10 a from the waterproof sheet roll 10, and the waterproof sheet 10 a is stretched along the outer peripheral surface of the waterproof sheet base 2.

  Then, the air bulk 7 attached to the shotcrete 102 at both ends in the width direction of the lower part of the tunnel shown in FIG. 6 and the flange 23 at the tip of the waterproof sheet mount 1 shown in FIG. The air bulk 7a is inflated by supplying air, and the space between the lower end portion of the waterproof sheet 10a and the sprayed concrete 102 stretched by the air bulk 7, 7a and the space between the tip portion of the waterproof sheet 10a and the shot concrete 102 are closed. In addition, between the rear end part of the spread waterproof sheet 10a and the shotcrete 102, the air bulk 7a provided at the front end part of the waterproof sheet 10a already laid on the rear side in the tunnel digging direction or the already installed waterproof sheet. It is closed with a filler 8 filled on the back side of 10a, and is connected to the existing air bulk 7a or the already-filled filler 8 at that location. The air bulks 7, 7a are protected by a nonwoven fabric 71 or the like so as not to be damaged during the sheet laying operation.

  Then, the filler 8 such as mortar is filled into the filler filling space 104 between the expanded waterproof sheet 10a and the shotcrete 102 so as to prevent leakage with the inflated air bulks 7 and 7a. The filled filler 8 is cured so as to adhere to the nonwoven fabric of the waterproof sheet 10a and the shotcrete 102, and is fixed so that the expanded waterproof sheet 10a is maintained in a stretched state, and is laid smoothly (see FIG. 7 (b), see FIG. In FIG. 8, 105 is a supporting work, 81 is an injection pipe for the filler 8, and 82 is an exhaust pipe for exhausting air from the filler filling space 104 when the filler 8 is filled.

  After that, as shown in FIG. 7C, a secondary lining mold frame 9 is installed on the inner side of the laid waterproof sheet 10a, and the secondary lining mold frame 9 and the laid waterproof sheet 10a are placed between the two. Next lay concrete. At this time, if necessary, concrete reinforcing steel bars are built in to form a tunnel structure.

  According to this embodiment, the plurality of feed rollers 16 of the waterproof sheet roll cradle 1 assist the rotation of the waterproof sheet roll 10 from the outer peripheral surface, and the waterproof sheet roll 10 regardless of the presence or absence of the core tube of the waterproof sheet roll 10. Can be rotated. Accordingly, when laying the waterproof sheet 10a, the waterproof sheet roll 10 without a core pipe can be used, and special considerations such as unloading the waterproof sheet roll 10 and using a special instrument for preventing the core pipe from being bent are used for storage work. Even if it does not perform, it becomes possible to perform the installation work of the waterproof sheet 10a reliably at low cost and high efficiency.

  In addition, the waterproof sheet roll 10 without the core tube can increase the number of trucks loaded on the truck as much as the bulk of the waterproof sheet roll 10 is reduced, thereby reducing the transportation cost and reducing the cost of the core tube. The waterproof sheet roll 10 is not wasted due to bending or crushing of the core tube, and work with a high yield is possible. Further, since the waterproof sheet roll 10 without the core tube is crushed into an ellipse shape at the time of storage, the number of storage at the storage location can be increased by increasing the number of stacked stages. Furthermore, the disposal of the core tube is completely unnecessary.

  Further, by connecting the waterproof sheet roll cradle 1 to each other, the rotation of the wide waterproof sheet roll 10 is assisted by the plurality of waterproof sheet roll cradles 1 integrated by the connecting rod 6 and the rod holding part 15. The waterproof sheet 10a can be pulled out stably. Moreover, it becomes possible to adjust the installation number of the waterproof sheet roll cradle 1 that is provided integrally and freely according to the width and weight of the waterproof sheet 10a. Further, since the feed roller 16 is provided with no power, adjustment work for driving synchronization is not required even if a plurality of waterproof sheet roll cradle 1 are provided.

  Further, when the waterproof sheet 10a is pulled out from the waterproof sheet roll 10 and guided to the outer peripheral surface side of the waterproof sheet base 2 by the guide roller 5, the waterproof sheet 10a comes into contact with the waterproof sheet base 2 to be waterproof. It is possible to prevent the sheet 10a from being damaged.

  Further, by the laying mechanism or the laying method of the present embodiment, the waterproof sheet 10a can be smoothly extended and laid so as to substantially follow the peripheral surface of the tunnel regardless of the presence or absence of the core pipe of the waterproof sheet roll 10. it can.

[Modifications of Embodiment, etc.]
The invention disclosed in this specification is specified by changing these partial configurations to other configurations disclosed in this specification, in addition to the respective inventions and embodiments, to the extent applicable. Including those specified by adding other configurations disclosed in the present specification, or those obtained by deleting these partial configurations to the extent that partial effects can be obtained, The following modifications are also included.

  For example, in the above-described embodiment, the case where the waterproof sheet 10a of the waterproof sheet roll 10 without the core pipe is extended and laid by the waterproof sheet roll cradle 1, the laying mechanism, and the laying method has been described. The base, the laying mechanism, and the laying method can be applied to the case where the waterproof sheet is drawn out from the waterproof sheet roll having the core tube. Moreover, the waterproof sheet laid in the present invention can be an appropriate sheet having a waterproof function in addition to a laminate of a nonwoven fabric and a waterproof sheet body.

  Moreover, although the case where the waterproof sheet 10a was constructed in the arch part of a tunnel was demonstrated in the said embodiment, also when laying the waterproof sheet 10a in a lower invert part, for example, the waterproof sheet roll cradle 1, the tow rope 3 and laying mechanism composed of winches 4 can be used. Moreover, the length of the waterproof sheet 10a of the waterproof sheet roll 10 to be used is the laying length in the tunnel circumferential direction. For example, when separately constructing the arch part and the invert part, the length of the arch part and the length of the invert part Say it.

  Moreover, the waterproof sheet roll cradle of the present invention extends the waterproof sheet 10a and the like on the waterproof sheet frame 2, and fills the gap between the sheet back surface and the sprayed concrete surface 102 with the filler 8 as it is, The application is not limited to the case where the waterproof sheet 10a and the like are laid smoothly, and for example, the waterproof sheet 10a and the like can be applied to a construction in which the waterproof sheet 10a is pulled out and temporarily held and fixed with a nail or a disk. Is possible.

  The present invention can be used, for example, when a waterproof sheet is laid so as to follow the peripheral surface of a tunnel.

DESCRIPTION OF SYMBOLS 1 ... Waterproof sheet roll holder 11 ... Side plate 111 ... Arc-shaped part 12, 13 ... Support member 14 ... Supporting leg 15 ... Rod holding part 16 ... Feed roller 10 ... Waterproof sheet roll 10a ... Waterproof sheet 2 ... Waterproof sheet mount 21 ... Mount Support frame 22 ... Stand support leg 23 ... Bridge 3 ... Towing rope 31 ... Mounting tool 4 ... Winch 5 ... Guiding roller 6 ... Connecting rod 7, 7a ... Air bulk 71 ... Nonwoven fabric 8 ... Filling material 81 ... Injection pipe 82 ... Exhaust pipe DESCRIPTION OF SYMBOLS 9 ... Secondary lining formwork 101 ... Ground mountain 102 ... Shotcrete 103 ... Rock bolt 104 ... Filling material filling space 105 ... Supporting work 201 ... Waterproof sheet roll 202 ... Waterproof sheet 203 ... Core pipe 204 ... Steel pipe 205 ... Bearing Tool 206 ... Hanging tool 207 ... Band

Claims (4)

A tarpaulin roll cradle on which a tarpaulin roll from which a tarpaulin laid to substantially follow the peripheral surface of the tunnel is drawn is placed;
It has a feed roller that is rotatably supported by non-power,
The plurality of feed rollers are spaced apart so as to form a substantially arcuate virtual slope that is concave upward and on which a waterproof sheet roll can be placed ,
A waterproof sheet roll pedestal characterized in that a rod holding portion is provided that extends in parallel with the axial direction of the feed roller and holds a connecting rod that connects the waterproof sheet roll pedestals to each other . A tarpaulin frame having an outer peripheral surface shaped substantially like the peripheral surface of the tunnel;
The waterproof sheet roll cradle according to claim 1 , wherein the tarpaulin roll cradle is provided near one end in the width direction of the lower part of the tunnel, and is installed so that the axial direction of the feed roller is substantially parallel to the extension direction of the tunnel. ,
The waterproof sheet roll spanned on the outer periphery of the waterproof sheet base from the other end side in the width direction of the lower part of the tunnel to the one end side, and the tip side is placed on the waterproof sheet roll base A towline attached to the end of the winding,
E Bei a winch to pull the tow line to the end portion side of the other,
The tarpaulin roll cradle is provided with an interval in the extension direction of the tunnel,
The connecting rod extends in parallel with the axial direction of the feed roller;
The waterproof sheet laying mechanism , wherein the connecting rod is held by each of the rod holding portions of the plurality of waterproof sheet roll cradles provided at intervals . Guidance for guiding the waterproof sheet drawn from the waterproof sheet roll placed on the waterproof sheet roll cradle to the outer peripheral surface side of the waterproof sheet mount on the one end side in the width direction of the lower part of the tunnel 3. The waterproof sheet laying mechanism according to claim 2, wherein a roller is provided on the waterproof sheet mount . A method of laying a waterproof sheet using the waterproof sheet laying mechanism according to claim 2 ,
A tarpaulin roll wound from the winding start end without a core tube is placed on the tarpaulin roll cradle. A method for laying a waterproof sheet comprising: pulling a waterproof sheet out of the waterproof sheet roll and extending the waterproof sheet so as to substantially follow an outer peripheral surface of the waterproof sheet base.

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