JP2013049963A - Curing device for tunnel lining concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which allows a curing sheet to be easily and accurately attached to the surface of a tunnel lining concrete without use of a large-scale facility.SOLUTION: A curing device 1 for a tunnel lining concrete comprises a pair of rails 4 and 4 which extend along the inner face of lining concrete 23 of a tunnel 21 in the circumferential direction of the tunnel and are arranged at a predetermined interval in the longitudinal direction of the tunnel, a sheet receiving frame 5 which is arranged between the pair of rails 4 and 4 at a predetermined distance away from the inner face of the lining concrete 23 along the inner face and holds a curing sheet 2 spread out in the circumferential direction of the tunnel at a temporary position away from the inner face of the lining concrete 23, and a roller 6 which is slidably arranged on the pair of rails 4 and 4 so as to bridge the pair of rails 4 and 4 and depresses the curing sheet 2 held at the temporary position by the sheet receiving frame 5 from the inside in the radial direction of the tunnel toward the inner face of the lining concrete.

Description

  The present invention relates to a curing device for curing the surface of lining concrete on a tunnel wall surface.

  By aging the concrete for a predetermined period after placing, the hydration reaction is promoted, and cracking due to drying or external force is prevented. Until now, in mountain tunnels and shield tunnels, the inside of the tunnel was kept hot and humid, and therefore, lining concrete was generally not cured after demolding. However, in recent years, a variety of lining concrete curing structures and curing methods have been developed, because if tunnels are sufficiently ventilated after tunnel penetration or due to improvements in equipment functions, etc., the properties of hardened concrete will be adversely affected. Has been.

  For example, as a curing method for tunnel lining concrete that can be constructed without using large-scale equipment, an adhesive is applied to the surface of the lining concrete, and a curing sheet having a heat curing function and a moisture curing function wound in a roll shape is used. , Use the tunnel moving formwork as a working scaffold, stick it to the surface of the lining concrete while rolling from one end side to the other end side of the tunnel circumferential direction, and roll it up and collect it after curing The invention has been proposed. (See Patent Document 1).

JP 2008-156927 A

  However, in the curing method for lining concrete described in Patent Document 1, the roll-shaped curing sheet is directly applied to the surface of the lining concrete while being rolled and unfolded by human power. Become. Moreover, if the direction of the curing sheet at the beginning of the application (one end side in the circumferential direction) is slightly shifted, the position of the curing sheet will be greatly shifted at the end of the application (the other end in the circumferential direction), and the curing applied first The wrapping cost with the sheet becomes large, or a gap is created between the sheet and the curing sheet that has been pasted. It is possible to change the roll deployment direction during pasting of the curing sheet or to cut the curing sheet once to correct the deployment direction, but in this way, there is a gap in the crease part of the curing sheet. It can be done or it looks bad.

  Here, it is conceivable to increase the width of the curing sheet to increase the directional accuracy at the beginning of the pasting. However, if the width of the curing sheet is increased, the roll becomes heavier and work by human power becomes difficult. Further, if a sheet laying device such as a waterproof sheet laying device described in JP-A-2001-059398 is used as a similar device for laying a sheet on the inner surface of the tunnel, a curing sheet can be attached with high accuracy. The use of such a large-scale apparatus is an object of the invention of Patent Document 1 in the first place, which leads to an increase in equipment cost, which is not preferable.

  The present invention has been made in view of such a background, and without using a large-scale facility, the tunnel lining is easy to construct and can attach the curing sheet to the surface of the lining concrete with high accuracy. An object is to provide a concrete curing device.

  In order to solve the above problems, the present invention is a tunnel lining concrete curing device (1), which extends in the tunnel circumferential direction along the inner surface of the lining concrete (23) of the tunnel (21), A pair of rails (4, 4) arranged at a predetermined interval in the longitudinal direction of the tunnel and an inner surface of the lining concrete between the pair of rails with a predetermined interval on the inner surface A curing sheet (2) that is disposed along the circumferential direction of the tunnel and is held between a pair of rails and a sheet receiving frame (5) that holds the curing sheet (2) in a temporary position spaced from the inner surface of the lining concrete. A roller (slidably provided on the pair of rails) that presses the curing sheet held in a temporary position by the sheet receiving frame from the inner side of the tunnel radial direction to the inner surface of the lining concrete ( Characterized by comprising a) a.

  According to the present invention, the curing sheet is placed in a temporary position on the sheet receiving frame in advance, and after being developed along the inner surface of the lining concrete, it is pasted by pressing the inner surface of the lining concrete with a roller. The position of the curing sheet can be adjusted in advance and pasted with high accuracy. Moreover, since the curing sheet disposed at the temporary position can be adhered to the inner surface of the lining concrete by sliding the rollers on the pair of rails, the curing sheet can be easily adhered. Furthermore, since the device can be configured with a simple configuration of a pair of rails, a sheet receiving frame, and rollers, it does not become a large scale even if a dedicated mount is used, for example, it can be provided on the overhanging scaffold behind the lining concrete lining. it can.

  Further, according to one aspect of the present invention, the sheet receiving frame is divided into left and right at substantially the center in the tunnel width direction, and the divided portion forms a supply portion (5a) to the temporary position of the curing sheet. The sheet receiving frame may be further provided with a sheet holder (9) that is disposed below the divided portion of the sheet receiving frame and rotatably holds the curing sheet.

  According to this configuration, in the state where the roll-shaped curing sheet is prepared and held by the sheet holder, the end portion of the curing sheet is connected to the lining inner surface and the sheet receiving frame from the supply unit obtained by dividing the sheet receiving frame. Since it can be inserted in between and pulled out in the horizontal direction of the tunnel in order to allow the curing sheet to be deployed at the temporary position, it is not necessary to roll the roll along the lining inner surface, and the curing sheet can be easily deployed.

  Further, according to one aspect of the present invention, the seat receiving frame is provided between the pair of rails and the plurality of connecting members (7) that extend over the pair of rails and extend in the tunnel front-rear direction. It can be set as the structure which has a rope (8) extended in a tunnel circumferential direction so that it may be spanned over the said some connection member.

  According to this structure, a sheet | seat receiving frame can be made into the simple structure comprised from a some connection member and rope. In addition, the rope can function as a guide unit when the curing sheet is expanded to the temporary position, and can also function as a slack preventing unit for the expanded curing sheet. Furthermore, since the position of the rope can be easily changed and removed, the rope can be removed when the adhesive is applied to the inner surface of the lining concrete so that other operations can be performed more efficiently.

  Further, according to one aspect of the present invention, the end portion of the roll-shaped curing sheet that is slidably provided on the pair of rails so as to be bridged between the pair of rails is held. In addition, it is possible to use a configuration that further includes unfolding means (15) for guiding the curing sheet to one end in the circumferential direction of the tunnel using gravity to unfold the curing sheet at the temporary position.

  According to this configuration, the curing sheet can be deployed at the temporary position by simply guiding the deployment means holding the end portion of the curing sheet to one end in the circumferential direction of the tunnel along the pair of rails. is there.

  As described above, according to the present invention, there is provided a tunnel lining concrete curing device that is easy to construct and can attach a curing sheet to the surface of the lining concrete with high accuracy without using a large-scale facility. can do.

Rear view of tunnel lining concrete curing device according to the first embodiment II-II sectional view in FIG. Part III enlarged view in FIG. Cross section of the roller shown in FIG. Explanatory drawing of installation procedure of curing sheet using curing apparatus shown in FIG. The principal part perspective view of the curing device which concerns on a modification The principal part perspective view of the curing device which concerns on 2nd Embodiment. Explanatory drawing of installation procedure of curing sheet by curing apparatus shown in FIG.

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

<< First Embodiment >>
First, a first embodiment of a tunnel lining concrete curing device 1 (hereinafter simply referred to as curing device 1) according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the curing device 1 according to the embodiment is used as a curing device for lining concrete 23 in a tunnel 21 having an arched upper section. Here, the tunnel 21 is a mountain tunnel that digs the natural ground 20 by blasting or the like, but may be a tunnel of another type such as a shield tunnel as long as it has the lining concrete 23. The lining concrete 23 is constructed by placing concrete inside the sprayed concrete 22 sprayed on the natural ground 20 using a formwork support 18 of a centle 17 (formwork carriage) shown in FIG.

  As shown in FIGS. 2 and 3, the formwork support 18 of the lining concrete 23 is usually removed immediately when a predetermined strength is developed in the concrete. Therefore, the concrete surface is cured by sticking the curing sheet 2 having heat retention (heat insulation) and moisture retention to the inner surface of the lining concrete 23. The curing sheet 2 is made of a vinyl bubble cushioning material in which a large number of bubbles are provided in the sheet, and is not only excellent in heat retention and moisture retention, but also lightweight and excellent in workability, and has impact absorption and water resistance. In addition, it is available at a lower price than a general curing sheet. As the bubble cushioning material, commercially available products such as bubble wrap (registered trademark), air cap (registered trademark), and air cell mat (registered trademark) can be used. Moreover, although the foam cushioning material in which the sheet | seat was provided on both surfaces of the bubble is used here, you may use what overlapped the bubble in multiple steps | paragraphs in order to further improve curing performance.

  The curing sheet 2 is applied directly to the inner surface of the lining concrete 23 with the adhesive 3 applied thereto. The lining concrete 23 placed by the centle 17 has a relatively long span (tunnel axial direction length) of about 10 m, but the curing sheet 2 is 1 m to as shown in FIGS. 2 and 3. Those having a width of about 1.5 m are developed in the circumferential direction of the tunnel. Here, they are overlapped with a predetermined lapping margin and are sequentially pasted in the tunnel axis direction. The curing device 1 shown in FIG. 1 is used in the pasting operation of the curing sheet 2.

  As the adhesive, it is possible to use commercially available paper paste as in Patent Document 1, but water-soluble polymer powders such as methyl cellulose, hydroxyl ethyl cellulose, welan gum, dutan gum or gua gum are used. Those diluted with water can be used.

  As shown in FIG. 1 to FIG. 3, the curing device 1 extends in the tunnel circumferential direction along the inner surface of the lining concrete 23 and has a predetermined interval (about 1.5 m in this case) in the tunnel axis direction. Between the pair of rails 4 and the inner surface of the lining concrete 23 between the pair of rails 4, a predetermined distance (here, about 350 mm to 400 mm) is disposed along the inner surface, A sheet receiving frame 5 that holds the curing sheet 2 developed in the direction at a temporary position spaced from the inner surface of the lining concrete 23 and a pair of rails 4 slidably provided on the pair of rails 4. And a roller 6 that presses the curing sheet 2 held at the temporary position by the sheet receiving frame 5 against the inner surface of the lining concrete 23 from the inner side in the tunnel radial direction.

  Thus, since the curing device 1 is configured by a simple configuration of the pair of rails 4, the sheet receiving frame 5, and the rollers 6, the overhanging scaffold provided here so as to protrude rearward from the rear portion of the center 17. A curing device 1 is attached to 19. In FIG. 2, the overhanging scaffold 19 is omitted to show the curing device 1 as a center. In order to support the curing device 1 so as to be movable, a dedicated gantry may be used instead of the overhanging scaffold 19, but in this case as well, there is no need to make the gantry large, and a gantry with a simple configuration may be prepared.

  Here, each rail 4 is formed by bending an angle member, and is constituted by two rail pieces 4a and 4b that are divided at the approximate center in the tunnel width direction, that is, at the upper end portion and arranged on the left and right. The ends of the rail pieces 4a and 4b adjacent to each other are curved so that the distance from the inner surface of the lining concrete 23 is larger than the other portions, and both the rail pieces 4a and 4b are adjacent to each other. Each part is supported by a column attached to the overhanging scaffold 19 so as to be separated from each other.

  The sheet receiving frame 5 includes a plurality of connecting members 7 that extend over the pair of rails 4 and extends in the tunnel axis direction, and a plurality of connecting members 7 between the pair of rails 4. And a rope 8 extending in the direction. The ropes 8 are arranged in two rows in the tunnel axis direction so as to equally divide the pair of rails 4 into three in the tunnel axis direction. The ropes 8 in each row are divided into left and right so as to connect only a group of connecting members 7 attached to the left and right rail pieces 4a and 4b. That is, the sheet receiving frame 5 is also divided into left and right at the approximate center in the tunnel width direction, and the separated portion formed by the division supplies the curing sheet 2 to the temporary position. 5a.

  Below the sheet supply part 5a of the sheet receiving frame 5, a sheet holder 9 for rotatably holding the roll-shaped curing sheet 2 is disposed. The sheet holder 9 is fixed to the overhanging scaffold 19 with the rotation axis extending in the tunnel axis direction. Accordingly, when the end portion of the roll-shaped curing sheet 2 held by the sheet holder 9 is pulled out and extended between the inner surface of the lining concrete 23 and the sheet receiving frame 5 through the sheet supply unit 5a, the curing sheet 2 is tunneled. It can be deployed in a circumferential position and spaced from the inner surface of the lining concrete 23. Thus, since it is not necessary to roll the roll-shaped curing sheet 2 along the inner surface of the lining concrete 23, the expansion | deployment operation | work of the curing sheet 2 is easy.

  Further, when the curing sheet 2 is developed in the tunnel circumferential direction, the rope 8 functions as a guide means for the curing sheet 2. Also by this, the expansion | deployment operation | work of the curing sheet 2 becomes easy. Further, since the connecting members 7 of the sheet receiving frame 5 are arranged at intervals in the tunnel circumferential direction, when the curing sheet 2 is developed in the tunnel circumferential direction and arranged at the temporary position, the curing sheet 2 is particularly removed from the roll. Although the upper part of the curing sheet 2 is easily loosened after being cut, since the rope 8 extends in the tunnel circumferential direction so as to connect the connecting members 7, loosening of the curing sheet 2 is also prevented.

  In this embodiment, as will be described in the method of pasting the curing sheet 2 described later, when the curing sheet 2 is developed in the tunnel circumferential direction, the adhesive 3 is applied to the inner surface of the lining concrete 23; It has become. Therefore, when the curing sheet 2 comes into contact with the inner surface of the lining concrete 23 during the development, it cannot be bonded and deployed. In this embodiment, the sheet receiving frame 5 is disposed at a position separated by about 350 mm from the inner surface of the lining concrete 23 in order to make the curing sheet 2 difficult to contact the lining concrete 23 during the development. Yes.

  As shown in FIGS. 3 and 4, the rollers 6 are provided at the center pipe 10 extending in the tunnel axis direction and at both ends of the center pipe 10, respectively, and are in contact with the pair of rails 4 and at the tunnel axis of the center pipe 10. It has a guide slider 11 and a handle 12 for restricting movement in the direction, and a cylindrical roller sponge 13 for sheet adhesion attached around the center pipe 10. The roller sponge 13 is an elastic body made of a synthetic rubber whose main component is a chloroprene polymer, and has a diameter (here, abutting against the inner surface of the lining concrete 23 with a predetermined pressing force when the roller 6 is slid on the rail 4. About 300 mm). Therefore, the entire surface of the curing sheet 2 can be obtained by moving the roller 6 along the rail 4 to one end (the left and right lower ends) along the rail 4 while pressing the curing sheet 2 placed at the temporary position from the inside of the tunnel. Can be brought into close contact with the inner surface of the lining concrete 23.

  In this embodiment, while the roller 6 is moved from the tunnel center upper side to the tunnel side lower side, the curing sheet 2 is pasted on the left half and the right half of the tunnel 21, respectively, 2 overlap. Then, the upper end portion of the rail 4 which is divided is curved so as to be separated from the inner surface of the lining concrete 23, so that the roller 6 can be engaged with the rail 4 in a state where no pressing force is generated. It has become possible to facilitate the pasting work of the curing sheet 2.

  As described above, the curing device 1 arranges the curing sheet 2 at a temporary position on the sheet receiving frame 5 in advance and develops the curing sheet 2 along the inner surface of the lining concrete 23, and then the curing sheet 2 is covered with the lining concrete by the roller 6. Since it can affix by pressing to the inner surface of 23, the position of the curing sheet 2 can be adjusted in advance before affixing and can be affixed with high precision. Moreover, since the curing sheet 2 placed at the temporary position can be adhered to the inner surface of the lining concrete 23 by sliding the roller 6 on the pair of rails 4, the affixing operation of the curing sheet 2 is also easy. .

  Next, with reference to FIG. 5, the sticking procedure of the curing sheet 2 performed using the curing apparatus 1 will be described. First, as shown to (A), the adhesive agent 3 is apply | coated using the sprayer 14 etc. to the inner surface of the lining concrete 23 after mold removal. At this time, since the rope 8 can be easily moved and removed, the application work of the adhesive 3 can be made more efficient by moving or temporarily removing the rope 8.

  Next, as shown in (B), the curing sheet 2 is pulled out from the roll, developed along the sheet receiving frame 5 in the circumferential direction of the tunnel, and placed at a temporary position separated from the inner surface of the lining concrete 23. In addition, when the roll-shaped curing sheet 2 is long, the curing sheet 2 is cut to a length that reaches the center of the tunnel 21. At this time, since the position of the lower end of the curing sheet 2 placed at the temporary position moves upward when being attached to the lining concrete 23, the lower end of the curing sheet 2 is positioned below the position where the lower end of the curing sheet 2 is to be attached. Make sure to sever while positioned.

  Then, as shown in (C), the roller 6 is engaged with the rail 4 from the part where the rail 4 at the center of the tunnel is divided so that the roller sponge 13 is on the lower side of the curing sheet 2, and the tunnel side lower side The curing sheet 2 is pressed against the inner surface of the lining concrete 23 with a predetermined pressing force and pasted.

<Modification>
As shown in FIG. 6, a holding member that is slidably provided on the pair of rails 4 so as to be bridged between the pair of rails 4 and holds an end portion of the roll-shaped curing sheet 2 held by the sheet holder 9. 15 may be configured to be included in the curing device 1. By doing so, the curing sheet 2 can be easily deployed to the temporary position by sliding the holding member 15 from the upper end side of the rail 4 to the lower end side of the tunnel side lower part using gravity. .

<< Second Embodiment >>
Next, with reference to FIG. 7 and FIG. 8, 2nd Embodiment of the curing apparatus 1 of the lining concrete 23 based on this invention is described. In addition, the same code | symbol is attached | subjected to the member similar to 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 7, in the curing device 1 for the lining concrete 23 according to the present embodiment, the roller 6 is a self-propelled type having motors 6 a at both ends in the axial direction, and extends along the inner surface of the lining concrete 23. Can move downward and upward. A sprayer 14 for applying the adhesive 3 to the inner surface of the lining concrete 23 is integrally attached to the roller 6. The sprayer 14 is formed by providing an injection nozzle 14b of the adhesive 3 at an appropriate position of a pipe 14a extending in the tunnel axial direction, and is provided at both ends in the axial direction of the roller 6 and extends toward one end side in the circumferential direction of the tunnel. It arrange | positions between the sheet | seat receiving frame 5 and the inner surface of the lining concrete 23 with a pair of existing arm 14c. A hose 14d connected to an adhesive supply device (not shown) is connected to one end of the pipe 14a, and the roller 6 sprays the adhesive 3 from the spray nozzle 14b during self-running, whereby the inner surface of the lining concrete 23 The adhesive 3 is applied over the width of the curing sheet 2 in the left or right half of the area.

  Here, after the curing sheet 2 is disposed on the sheet receiving frame 5, the spray nozzle 14 b of the sprayer 14 is disposed outside the curing sheet 2 in the tunnel radial direction, and the roller sponge 13 of the roller 6 is disposed from the curing sheet 2. Also, the adhesive 3 is sprayed from the injection nozzle 14b while being disposed on the inner side in the tunnel radial direction, and the roller 6 is caused to travel from the center upper side of the tunnel cross section to one end side (side lower side) in the circumferential direction. 3 and pasting of the curing sheet 2 can be performed simultaneously.

  According to the curing device 1 of the present embodiment, before applying the adhesive 3 to the inner surface of the lining concrete 23, the curing sheet 2 is placed in a temporary position separated from the inner surface of the lining concrete 23. Will be deployed in the tunnel circumferential direction. Therefore, even if the curing sheet 2 comes into contact with the lining concrete 23 during the unfolding operation, the curing sheet 2 is easy to unfold without sticking.

  As in the modification of the first embodiment, as shown by an imaginary line in FIG. 7, a clip 16 or the like is attached as a gripping means for gripping the end of the curing sheet 2 to the pipe 14a of the sprayer 14 or the like. The roll-shaped curing sheet 2 may be developed in the circumferential direction of the tunnel by running 6, thereby making it easier to expand the curing sheet 2. However, in this case, if the roller sponge 13 of the roller 6 is in pressure contact with the lining concrete 23, the curing sheet 2 cannot be developed due to friction with the lining concrete 23. The roller sponge 13 brings the curing sheet 2 into contact with the inner surface of the lining concrete 23 when the curing sheet 2 is unfolded. Do not let it.

  This is the end of the description of the specific embodiments. However, the present invention is not limited to these embodiments, and the specific shape, arrangement, quantity, and the like of each member are within the scope of the present invention. It can be changed as appropriate. For example, in the above embodiment, the adhesive 3 is applied to the inner surface of the lining concrete 23, but the adhesive 3 may be applied to the curing sheet 2. Moreover, in the said embodiment, although the sheet | seat receiving frame 5 is comprised so that it may have the connection member 7 and the rope 8, it provides a resin board etc. instead of the rope 8, and prevents the curing sheet 2 from loosening and develops it manually. The function as a guide means at the time of making it may be secured. On the other hand, all the components of the curing device 1 according to the present invention shown in the above embodiment are not necessarily essential, and can be appropriately selected as long as they do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Curing apparatus 2 Curing sheet 4 Rail 5 Sheet receiving frame 5a Sheet supply part 6 Roller 7 Connecting member 8 Rope 9 Sheet holder 15 Holding member (deployment means)
17 Centle 19 Overhang scaffold 21 Tunnel 23 Lining concrete

Claims (4)

A pair of rails extending in the circumferential direction of the tunnel along the inner surface of the lining concrete of the tunnel, and arranged at a predetermined interval in the longitudinal direction of the tunnel;
A curing sheet, which is disposed along the inner surface with a predetermined gap between the pair of rails and the inner surface of the lining concrete, is separated from the inner surface of the lining concrete. A sheet receiving frame to be held in the temporary position,
The curing sheet, which is slidably provided on the pair of rails so as to be bridged between the pair of rails, is pressed against the inner surface of the lining concrete from the inner side in the tunnel radial direction by the sheet receiving frame. A tunnel curing concrete curing device, characterized by comprising a roller to perform. The sheet receiving frame is divided into right and left at a substantially center in the tunnel width direction, and the divided part forms a supply portion to a temporary position of the curing sheet,
The tunnel cover according to claim 1, further comprising a sheet holder that is disposed below the divided portion of the sheet receiving frame and rotatably holds the cured sheet. Concrete curing equipment.   The sheet receiving frame includes a plurality of connecting members that extend over the pair of rails and extends in the tunnel front-rear direction, and a tunnel circumferential direction so as to be extended over the plurality of connecting members between the pair of rails. The tunnel lining concrete curing device according to claim 1, further comprising: a rope extending to the tunnel.   The pair of rails is slidably provided so as to be bridged between the pair of rails, holds the end of the roll-shaped curing sheet held by the sheet holder, and uses the gravity in the circumferential direction of the tunnel. The curing apparatus for tunnel lining concrete according to claim 2 or 3, further comprising unfolding means for guiding to one end and unfolding the curing sheet to the temporary position.

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