JP2019124068A - Waterproof sheet expanding device for tunnel - Google Patents

Abstract

To improve an installation accuracy of a waterproof sheet by enabling the fine adjustment of the expansion direction of the waterproof sheet, and to eliminate a cutting operation of the sheet end in a weld joint in the circumferential direction of a tunnel.SOLUTION: The present invention consists of a rail 2 disposed along the circumferential direction of a tunnel with respect to a work gantry 1 and a waterproof sheet extending device main body 3 traveling along the rail 2. The waterproof sheet expanding device main body 3 includes a traveling carriage 4 traveling along the rails 2, a holding shaft 5 of the waterproof sheet 12 oriented along the tunnel direction on the traveling carriage 4, a pair of left and right movable platforms 7, 7 arranged to be movable in the traveling direction of the traveling carriage 4 by a slide jacks 6 disposed respectively on the left and right sides of the traveling carriage 4, a pair of left and right tilting arms 9, 9 pivotally supported at one end on the upper surface side of the movable platforms 7, 7 and pivoted toward the supporting surface by tilting jacks 8, and a presser bar 10 of the waterproof sheet 12 which connects front-end tips of these pair of left and right tilting arms 9, 9.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a waterproofing sheet for tunnel tarpaulins for expanding a tarpaulin against a supporting surface before placing lining concrete in mountain tunnel construction.

  Conventionally, in mountain tunnel construction, in order to prevent isolation and leakage of water from the ground into the tunnel, a tarpaulin is laid on the support surface before placing the lining concrete, and then lining is completed. Concrete is being cast. In the past, the waterproof sheet has been stretched by laying the waterproof sheet manually on the supporting surface such as shotcrete using a work stand, but in recent years the waterproof sheet has been enlarged (width × As the thickness increases, manual work becomes difficult, and development of a stretching device that mechanically performs the work of laying a waterproof sheet has been conducted.

  For example, in the following patent document 1, it is a waterproof sheet tensioning device used when unrolling the waterproof sheet wound around a sheet roll and stretching it on the tunnel inner wall, and the working carriage is approximately arched along the tunnel inner wall At least a pair of rail members provided thereon, at least a pair of wheel members movably provided to the rail members, and a shaft member attached to the wheel members and rotatably supporting the sheet roll A tarpaulin tensioning device is disclosed.

  Moreover, in the following patent document 2, it is comprised so that it may drive | work from the end part of a rail part for travel comprised from a pair of guide travel rails of the same size as a tunnel cross section to the other end. The drive unit is configured to travel from the end of the travel rail to the other end while being pulled by the drive, and corresponds to the distance between the pair of guide travel rails The sheet holder portion configured to rotatably support both ends of the rolled waterproof sheet configured to have a width, and the waterproof sheet pulled out from the sheet holder portion are supported on one of the support surface or the waterproof sheet. A tarpaulin for tunnels comprising a sheet pressure roller arm configured to be disposed as desired with a locking device and to be crimped to the supporting surface from the tunnel center side of the tarpaulin Location is disclosed.

  Furthermore, in Patent Document 3 listed below, at least a pair of guide rails curved along the spray surface of the tunnel, a pair of roller portions moving along the pair of guide rails, and a sheet provided to bridge the pair of roller portions. The sheet holding unit is disposed along the longitudinal direction of the tunnel, the attaching unit is disposed at the rear in the stretching direction of the sheet holding unit, and the pressing head is rotated at the free end. A tensioning device for a tunnel tarpaulin is disclosed, in which a pressing head is pivotally supported by a swing cylinder so as to be able to move back and forth with respect to the blowing surface by means of a swing cylinder.

Unexamined-Japanese-Patent No. 2000-291392 JP, 2001-59398, A JP, 2002-266596, A

  Certainly, the work load on the workers has been significantly reduced by the expansion work of the tarpaulin being mechanized from manual work. However, since the expansion direction of the waterproof sheet can not be corrected in the case of the expansion device of each waterproof sheet, the correction of the expansion direction of the waterproof sheet at the weld joint or the like generated at the middle point in the tunnel circumferential direction I was supposed to do it. At that time, as shown in FIG. 11, the surplus length becomes unbalanced in the width direction at the welded joints of the waterproof sheets 50, 50... And the work of cutting the extra length is newly generated. .

  Therefore, the main object of the present invention is to provide a stretching apparatus capable of mechanically stretching the waterproof sheet, and to improve the installation accuracy of the waterproof sheet by enabling fine adjustment of the stretching direction of the waterproof sheet. And eliminating the cutting operation of the sheet end at the weld joint in the circumferential direction of the tunnel.

In order to solve the above problems, the present invention according to claim 1 is that, with respect to the work gantry movable along the tunnel direction, the work gantry is provided in the tunnel direction with a predetermined separation distance from the supporting surface. A plurality of rails disposed along the circumferential direction of the tunnel at a distance from each other, and a waterproof sheet expanding device main body capable of traveling along the rails and expanding the waterproof sheet along with traveling.
The waterproof sheet stretching apparatus main body includes a traveling carriage capable of traveling along the rails, a holding shaft of the waterproof sheet oriented along the tunnel direction to the traveling carriage, and left and right sides on the traveling carriage A pair of left and right movable stages movable in the traveling direction of the traveling carriage by the slide jacks, and one end thereof are pivotally supported on the upper surface side of these movable stages and pivoted toward the supporting surface by the tilting jacks There is provided a tunnel waterproofing sheet expanding device characterized in that it comprises a pair of left and right tilting arms and a pressing rod of a waterproof sheet which connects the ends of the pair of left and right tilting arms.

  In the invention according to the first aspect, a plurality of rails disposed along the circumferential direction of the tunnel at predetermined intervals in the tunnel direction with respect to the work rack, and capable of traveling along the rails and traveling A tarpaulin stretching device is configured by the tarpaulin stretching device main body that expands the tarpaulin accordingly. The waterproof sheet stretching apparatus main body includes a traveling carriage capable of traveling along the rails, a holding shaft of the waterproof sheet oriented along the tunnel direction to the traveling carriage, and left and right sides on the traveling carriage A pair of left and right movable stages movable in the traveling direction of the traveling carriage by the slide jacks, and one end thereof are pivotally supported on the upper surface side of these movable stages and pivoted toward the supporting surface by the tilting jacks It comprises a pair of left and right tiltable arms and a presser bar of a waterproof sheet which connects the tips of the pair of left and right tilt arms.

  Therefore, when the waterproof sheet wound around the holding shaft is set, when the waterproof sheet is gradually expanded while traveling the traveling carriage, the expansion and contraction control of the tilting jack and the tilting control of the tilting arm are performed. The waterproof sheet can be crimped against the support surface and stretched by the presser bar at the tip.

  Moreover, in this device, fine adjustment of the expansion direction of the waterproof sheet can be performed. That is, it is possible to provide an inclination angle in plan view with respect to the orientation direction of the presser bar by moving and controlling any of the movable stands disposed on the left and right in the traveling direction of the traveling carriage. It is possible to make correction in the direction in which the waterproof sheet is stretched by inclining the crimped line (line of the presser bar) of the waterproof sheet. Therefore, when a slight displacement occurs in the expansion direction of the waterproof sheet, the movable table is moved back and forth by the slide jack to make the pressing bar have an inclination angle in plan view, and the movement direction is finely divided in the expansion direction of the waterproof sheet. By applying the correction, the construction accuracy of the waterproof sheet can be improved, and the cutting operation of the sheet end in the welded joint in the tunnel circumferential direction can be eliminated.

  According to a second aspect of the present invention, the traveling carriage is provided with a drive unit on each side of the rail, and the drive unit is independently drivable. An apparatus is provided.

  In the invention according to the second aspect, the traveling carriage is provided with a drive unit on each side of the rail, and the drive unit is capable of being driven independently. That is, by independently driving each drive unit, the expansion direction of the waterproof sheet can be further easily adjusted by slightly rotating the entire traveling bogie only around the yaw axis in plan view.

  In the present invention according to claim 3, the rail is driven by a hydraulic motor mounted on the traveling carriage, with the grooved form line back-to-back with a spacer interposed, and a chain disposed on the upper surface of the spacer The apparatus for expanding a waterproof sheet for tunnels according to any one of claims 1 and 2, which can travel along a rail by meshing a chain sprocket with a chain sprocket.

  The invention according to claim 3 is an example of the rail traveling structure in the traveling carriage. In the case of this rail, since it is disposed along the arc surface in the circumferential direction of the tunnel, it is important that the traveling carriage does not slip relative to the rail. For this purpose, it is desirable to arrange a chain on the rail surface and to drive the sprocket meshing with the chain by a hydraulic motor.

  In the present invention according to claim 4, the connecting portion between the tilting arm and the presser bar is a hinge joint which allows rotation around a vertical axis, and can follow changes in the orientation direction of the presser bar. An apparatus for expanding a waterproof sheet for tunnels according to any one of claims 1 to 3 is provided.

  In the invention according to the fourth aspect, in this device, fine adjustment is made in the expansion direction of the waterproof sheet by giving the presser bar an inclination angle in plan view. Although it is possible to make the change in the orientation direction of the presser bar follow by elastic deformation, by making the connecting portion between the tilting arm and the presser bar a rotation around an axis in the vertical direction It becomes possible to flexibly follow the change in the orientation direction of the presser bar without difficulty.

  In the present invention according to claim 5, the tunnel waterproofing sheet according to any one of claims 1 to 4, further comprising a one-side direction bending portion capable of bending only to the support surface side at an intermediate point of the tilting arm. An apparatus is provided.

  In the invention according to the fifth aspect, in order to prevent the tilting arm from colliding with the traveling carriage or the like and damaging it when the tilting jack is contracted excessively, the intermediate point of the tilting arm to the support surface side It is made to have the one-side direction bending part which enables only bending.

  As described above in detail, according to the present invention, it is possible to provide a stretching apparatus capable of mechanically stretching the waterproof sheet, and at the same time, the construction accuracy of the waterproof sheet can be made by finely adjusting the stretching direction of the waterproof sheet. It is possible to improve and eliminate the cutting operation of the sheet end in the weld joint in the tunnel circumferential direction.

It is a cross-sectional view which shows the expansion | extension apparatus of the tarpaulin which concerns on this invention. The waterproof sheet expansion apparatus main body 3 is shown, (A) is sectional drawing, (B) is a top view. FIG. 10 is an operation explanatory view of the operation of the tilting arm 9 of the waterproof sheet stretching device main body 3 and the operation of the moving table 7; It is operation | movement explanatory drawing at the time of giving inclination angle +/- (theta) to the orientation direction of the presser bar 10. FIG. It is a principal part expanded sectional view showing an example of rail travel structure. It is a construction procedure figure (the 1) which shows the expansion point of waterproof sheet 12. It is a construction procedure figure (the 2) which shows the expansion point of waterproof sheet 12. It is a construction procedure figure (the 3) which shows the expansion point of the waterproof sheet 12. It is a figure (A) (B) which shows the modification of tilting arm 9. In FIG. It is a figure which shows the collision state with respect to the traveling truck of the tilting arm 9 at the time of making the tilting jack 8 shrink | contract excessively. It is a plane development view showing a state in which excess length allowances become unbalanced in the width direction at the welded joints of the waterproof sheets 50, 50.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the apparatus for expanding a waterproof sheet for tunnels according to the present invention has a predetermined separation with respect to the support surface S with respect to the work platform 1 movable along the tunnel direction. In the state having a distance, it is possible to travel along a plurality of rails 2, 2 in the figure, and the rails 2, 2 arranged along the circumferential direction of the tunnel at a predetermined distance in the tunnel direction. And it consists of the waterproof sheet expansion apparatus main body 3 which expands the waterproof sheet 12 with driving | running | working.

  The waterproof sheet expanding device main body 3 has a traveling carriage 4 capable of traveling along the rails 2 and 2, and a holding shaft 5 of a waterproof sheet (rolled state) oriented in the tunnel direction on the traveling carriage 4 And a pair of left and right movable carriages 7 and 7 movable in the traveling direction of the traveling carriage 4 by the slide jacks 6 disposed on the left and right sides of the traveling carriage 4 respectively, and these movable carriages 7 and 7 The left end of the left and right tilting arms 9, 9 and the left end of the left and right tilting arms 9, 9 are connected by pivot jacks 8 pivotally supported at one end on the upper surface side of the It consists of the presser bar 10 of the waterproof sheet 12.

  Hereinafter, further detailed description will be given based on the drawings.

  The work stand 1 is a carriage for stretching work of a tarpaulin 12 which can be moved along rails 40, 40 laid along the tunnel direction with respect to the invert H, and the center of the tunnel is A transit space is formed for vehicles coming and going. The combination of stairs and landings allows workers to go close to the inner wall of the tunnel.

  In this apparatus, the tunnel with a predetermined separation distance (approximately 2 to 5 m) in the tunnel direction with a predetermined separation distance with respect to the work support surface S such as shotcrete with respect to the work rack 1 A plurality of, in the illustrated example, two rails 2, 2 are provided along the circumferential direction, and travel along these two rails 2, 2 is possible, and the waterproof sheet 12 is expanded along with traveling. A tarpaulin stretching apparatus main body 3 is provided. As illustrated, the waterproof sheet stretching apparatus main body 3 can travel along substantially the entire length in the tunnel circumferential direction excluding the front and rear end portions.

  Further, the waterproof sheet stretching device main body 3 will be described in detail with reference to FIGS.

  As shown in FIG. 2, the traveling carriage 4 is provided with a pair of upper and lower pairs of rollers 11 for holding the upper flange of the rail 2 at four front, rear, left, and right positions. It is desirable that the traveling carriage 4 be provided with a drive unit (not shown) on each side of the two rails 2 and 2 and that these drive units can be independently driven. For example, even if an H-shaped ruler is used as the rail 2 and the left and right sides of the traveling carriage 4 can be independently driven by driving any of the left and right sides of the pair of rollers 11 by a motor. For example, as shown in FIG. 5, the grooved formwork 15, 15 is back-faced with the spacer 16 interposed, and the chain 17 is disposed on the upper surface of the spacer 16 and mounted on the traveling carriage 4 The sprocket 18 driven by the hydraulic motor may be meshed with the chain 17 so as to be able to travel along the rail 2.

  A holding shaft 5 of the waterproof sheet 12 oriented along the tunnel direction is disposed at a position on the front side in the traveling direction when the waterproof sheet 12 of the traveling carriage 4 is expanded. The waterproof sheet 12 is carried to the site in a state of being wound around a void pipe, and is set so as to extend over the bearings 13 and 13 of the traveling carriage 4 through the holding shaft 5 through the void pipe.

  On the left and right sides of the traveling carriage 4, a pair of left and right moving platforms 7, 7 movable in the traveling direction of the traveling carriage 4 by the slide jacks 6, 6 are provided. The moving table 7 is made of H-shaped steel, and upper and lower paired rollers 21 are respectively disposed on the front and rear of a grooved steel 20 disposed in a pair on the left and right so as to sandwich it. The movable table 7 is movable along the traveling direction of the traveling carriage 4 by holding the lower flange of the movable table 7 (H-shaped steel) between the rollers 21. Then, the tip of the slide jack 6 disposed in a horizontal orientation is connected to the front end of the movable table 7, and as shown in FIG. 3 (B), the movable table 7 is controlled by the expansion and contraction of the slide jack 6. It is supposed to be

  A first support plate 22 is provided on the upper surface side of the movable table 7. A pair of left and right tilts, one end of which is pivotally supported by a pin 23 on the first support plate 22, is swingable toward the support surface S. Arms 9, 9 are provided. A connecting member 26 is provided to connect the base ends of the pair of left and right tilting arms 9, 9 and a small arm 24 is provided projecting from the connecting member 26. The rear end of the cylinder is the second support plate The tip end of the piston of the tilting jack 8 rotatably supported at 25 is pivotally supported at the tip end of the small arm 24. Therefore, as shown in FIG. 3B, the tilting arm 9 is controlled to swing toward the supporting surface S by the expansion and contraction operation of the tilting jack 8.

  At the tip of the tilting arm 9 is provided a presser bar 10 of a waterproof sheet 12 connecting the pair of left and right tilting arms 9, 9. The connecting portion between the tilting arm 9 and the presser bar 10 is a hinge joint that allows rotation about a vertical axis, and can follow a change in the orientation direction of the presser bar 10 (inclination in plan view) Is desirable. That is, as shown in FIG. 4A, the press rod 10 is made to have an inclination angle of θ (angle change in orientation direction) in plan view by moving the lower movable table 7 in the direction of the arrow in the figure. It is possible, as shown in FIG. 4 (B), to move the upper movable table 7 in the direction of the arrow in the figure to the tilt angle of -.theta. It becomes possible to have).

  Therefore, as shown in FIG. 2, normally, the presser bar 10 is oriented perpendicularly to the traveling direction of the traveling carriage 4, and the waterproof sheet 12 wound around the holding shaft 5 is pulled out. The waterproof sheet 12 is drawn out as it advances, and the waterproof sheet 12 is crimped to the supporting surface S by pressing the presser bar 10 against the supporting surface side by the swing control of the tilting arms 9 and 9.

When a slight displacement occurs in the expansion direction of the waterproof sheet 12, any one of the movable tables 7 is moved back and forth by the slide jack 6 to make the pressing rod 10 have an inclination angle (± θ) in plan view. It is possible to improve the construction accuracy of the waterproof sheet 12 by making it have a slight correction in the expansion direction of the waterproof sheet 12 and to eliminate the cutting operation of the sheet end in the weld joint in the tunnel circumferential direction. Become.
[Construction procedure]
Next, the expansion procedure using the waterproof expansion device will be described in detail with reference to FIGS.

  When the work platform 1 is stopped at the expansion position of the waterproof sheet 12, the waterproof sheet 12 wound around the holding shaft 5 is set to the waterproof sheet expansion device main body 3. For mounting, as shown in FIG. 6, after the bearing portion 13 of the tarpaulin expanding device main body 3 is moved downward to the right end side of the rail 2 in the drawing, it is lifted and set by heavy machinery. Next, as shown in FIG. 7 and FIG. 8, after being moved to the left end side of the rail 2 in the drawing, the presser bar while moving the waterproof sheet stretching device main body 3 while unwinding the waterproof sheet 12 gradually. While the waterproof sheet 12 is crimped to the support surface S by 10, the waterproof sheet 12 is expanded.

  For fixing the waterproof sheet 12 to the support surface S, various methods such as electromagnetic induction welding, surface fasteners, adhesives and the like have been put to practical use, but any method may be used.

  In the method using electromagnetic induction welding, a non-woven fabric (back cushioning material) is fixed to the support surface S with concrete nails and a disk (plastic disk) or the like on which a welding material for electromagnetic induction welding is attached Secure the waterproof sheet 12 from above with a concrete nail from above, and expand the waterproof sheet 12 from the surface side of the waterproof sheet 12 with a disk welder (high frequency current generating coil) by electromagnetic induction welding using a disk welder (disk with welding material ( The method of welding and fixing to a plastic disk or the disk (plastic disk) on which the welding material for electromagnetic induction welding is pasted to the support surface S is fixed with concrete nails in advance (in the factory ) From the surface side of the waterproof sheet 12 while expanding the waterproof sheet 12 (laminated sheet material) with non-woven fabric (back cushioning material) bonded together Elder is a (high-frequency current generating coil) by the method and with welded waterproof sheet 12 by electromagnetic induction welding material disc (plastic disc) continue to welded and fixed.

  In the method using the surface fastener, a non-woven fabric (back cushioning material) is fixed to the supporting surface S with concrete nails, and the non-woven fabric (back cushioning material) and the surface fastener that can be mechanically retained in advance A method of bonding to the nonwoven fabric (back cushioning material) lined with the waterproof sheet 12 by pressing down from the front surface side of the waterproof sheet 12 while expanding the waterproof sheet 12 laminated on the back surface, or the support surface S The non-woven fabric (back side cushioning material) and the surface fastener that can be mechanically retained can be fixed beforehand with concrete nails, and the waterproof sheet 12 (laminated sheet) with non-woven fabric (back side cushioning material) bonded beforehand (in the factory) There is a method of bonding the waterproof sheet 12 by pressing the material from the surface side of the waterproof sheet 12 while expanding the material.

  In the method using the adhesive, a non-woven fabric (back cushioning material) is fixed to the supporting surface S with concrete nails, and a disc (plastic disk) or the like coated with an adhesive is concreted from above the non-woven fabric (back cushioning material) In this method, the waterproof sheet 12 is adhered and fixed to a disc with an adhesive (a plastic disc) by holding the waterproof sheet 12 from the surface side of the waterproof sheet 12 while fixing the waterproof sheet 12 with a nail.

  When joining the waterproof sheet 12 at the intermediate point in the circumferential direction of the tunnel, the waterproof sheet 12 is tunneled while repeatedly setting a new waterproof sheet 12 with respect to the waterproof sheet stretching apparatus main body 3 according to the procedure of FIG. Make it continuous in the circumferential direction. The junctions in the circumferential direction of the tunnel may be such that the waterproof sheets 12 are continuously joined by a thermal welding machine.

[Other embodiment]
(1) It is possible to provide a safety mechanism for preventing the tilting arm 9 from colliding with the traveling carriage 4 and damaging it when the tilting jack 8 is contracted excessively. . Specifically, as shown in FIG. 9, the proximal arm 9A and the distal arm 9B are divided at the intermediate point of the tilting arm 9, and they are joined by a pin 30 so that they can be bent. The bending stopper 31 is provided on the distal end arm 9B side at the connection portion between the proximal end arm 9A and the distal end arm 9B, and is extended to the proximal end arm 9A side to form the proximal end arm 9A and the distal end side. The arm 9B and the arm 9B are configured to have a one-side direction bending portion capable of bending only to the support surface side, which prevents bending in a substantially linear state or more by collision.

  As shown in FIG. 9A, when the proximal arm 9A and the distal arm 9B extend straight, the bending stopper 31 stops the counterclockwise rotation of the distal arm 9B. There is no hindrance to crimping. However, as shown in FIG. 10, when the tilting jack 8 is excessively contracted and the tilting arm 9 collides with the traveling carriage 4, the clockwise rotation of the distal end side arm 9B is permitted. The tilting arm 9 can be prevented from being damaged.

  DESCRIPTION OF SYMBOLS 1 ... Work stand, 2 ... Rail, 3 ... Waterproof sheet expansion apparatus main body, 4 ... Traveling trolley, 5 ... Holding shaft (for waterproof sheet), 6 ... Slide jack, 7 ... Moving base, 8 ... Tilting jack, 9 ... Tilting arm, 10 ... Presser bar, 11 ・ 21 ... Set roller, 12 ... Waterproof sheet, 13 ... Bearing, S ... Support surface,

Claims (5)

A plurality of work racks arranged along the circumferential direction of the tunnel at predetermined intervals in the tunnel direction with a predetermined separation distance from the support surface with respect to the work rack which is movable along the tunnel direction It consists of a book rail and a tarpaulin expansion device body that can travel along this rail and expand the tarpaulin along with traveling.
The waterproof sheet stretching apparatus main body includes a traveling carriage capable of traveling along the rails, a holding shaft of the waterproof sheet oriented along the tunnel direction to the traveling carriage, and left and right sides on the traveling carriage A pair of left and right movable stages movable in the traveling direction of the traveling carriage by the slide jacks, and one end thereof are pivotally supported on the upper surface side of these movable stages and pivoted toward the supporting surface by the tilting jacks A tunnel waterproofing sheet stretching apparatus comprising: a pair of left and right tilting arms; and a pressing rod of a waterproof sheet connecting the ends of the pair of left and right tilting arms.   The apparatus for expanding a waterproof sheet for tunnels according to claim 1, wherein the traveling carriage is provided with a drive unit on each side of the rail, and the drive units can be driven independently.   In the rail, a grooved form line is back-faced with a spacer interposed, and a chain is disposed on the upper surface of the spacer, and a sprocket driven by a hydraulic motor mounted on the traveling carriage meshes with the chain The apparatus for expanding a waterproof sheet for tunnels according to any one of claims 1 and 2, wherein the apparatus is capable of traveling along the rails.   The connection part of the said tilting arm and the said press bar is made into the hinge joint which accept | permits rotation of the surroundings of an up-down direction axis, and can follow the change of the orientation direction of the said press bar. Device for tarpaulins for tunnels.   The apparatus for expanding a waterproof sheet for tunnels according to any one of claims 1 to 4, wherein the intermediate point of the tilting arm has a one-side direction bending portion which enables bending only to the supporting surface side.

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