JP6599267B2 - Method for manufacturing curved cement plywood - Google Patents

Description

  The present invention relates to a method for producing a curved cement plywood having a curved plate surface.

  A cement plate having a curved plate surface is known (see, for example, Patent Documents 1 and 2).

JP-A-9-227211 JP 2000-141546 A

However, in Patent Document 1, since a curved surface is formed by applying a load to a precured body that has not been completely cured, manufacturing control for manufacturing the precured body is required, and the precured body is also cured. It must be cured for a long time (for example, 120 hours) with a load applied to the pre-cured body until the body is cured. Therefore, in patent document 1, the manufacturing management for manufacturing a wood cement board to a curved board is complicated, manufacturing time becomes long, and manufacturing cost increases.
Moreover, in patent document 2, the inorganic board which laminated | stacked and integrated the front and back layers which have a reactivatable binder (binder which softens when heated in presence of water, and hardens again when cooled), and a core layer are laminated. Because it is curved, it is necessary to mold a special front and back layer containing a reactivatable binder as a component and a core layer. In addition, a reactivatable binder is formed in the presence of moisture on an inorganic plate. Special manufacturing processes such as heating and cooling are required. Therefore, in patent document 2, the material and manufacturing process for manufacturing a veneered inorganic board into a curved board become special, material costs increase, manufacturing management is complicated, and manufacturing time becomes long. , Manufacturing costs increase.
The present invention provides a method for producing a curved cement plywood that is excellent in terms of production management, production time, and production cost.

According to the method for producing a curved cement plywood according to the present invention, the plate surface of one cement plate formed as a main plate with cement as a main component and the plate surface of the other cement plate formed as a main plate with cement as a main component; The cement plywood by applying pressure on both sides of the cement plywood between the step of forming a cement plywood with adhesive and the time from the time when the adhesive is not solidified until the adhesive solidifies And forming a cement plywood into a curved surface by pressing after forming a cement plywood by bonding the plate surfaces of a pair of cement plates together with an adhesive. In this case, a special material is not used, and a special manufacturing process is not required. Therefore, it is possible to provide a method for manufacturing a curved cement plywood that is excellent in terms of manufacturing management, manufacturing time, and manufacturing cost.
Moreover, since the curved cement plywood having the configuration in which the reinforcing material is interposed between the plate surface of the cement plate and the plate surface of the cement plate is manufactured, the curved cement plywood reinforced with the reinforcing material can be manufactured.
In addition, since the curved cement plywood is manufactured such that the reinforcing material is positioned on the curved surface having the smaller diameter, the curved cement plywood that is strong against tensile force can be manufactured.

(A) is a perspective view of a cement board, (b) is sectional drawing of a cement plywood. Process drawing which shows a curved-surface cement plywood formation step. The perspective view which shows the lower mold | type of a shaping | molding die. (A) is a perspective view of a curved cement plywood, (b) is an enlarged side view of a curved cement plywood. The figure which shows a reinforcement structure in the cross section orthogonal to the central axis of a block material pile tunnel. The perspective view which shows a reinforcement structure seeing from the inner side of a block material stacking tunnel lining part. The disassembled perspective view which shows the reinforcement structure of a block material tunnel lining part. Sectional drawing which shows the fixation structure of a reinforcement board positioning member. Sectional drawing which shows the example of the fixing method of a reinforcement board. The front view which shows a reinforcement structure seeing from the inner side of a block material stacking tunnel lining part. Sectional drawing which shows the example of the fixing method of a reinforcement board.

Embodiment 1
The method for manufacturing a curved cement plywood includes a cement plate forming step, a cement plywood forming step, and a curved cement plywood forming step.
Hereinafter, each step will be described with reference to FIGS.

  In the cement plate forming step, a plurality of cement plates 100 as shown in FIG.

In the cement plywood forming step, as shown in FIG. 1B, the cement plywood 110 is formed by bonding the two cement boards 100: 100. That is, one plate surface 101 of one cement plate 100a (100) formed on a flat plate with cement as a main component and the other plate surface of the other cement plate 100b (100) formed on a flat plate with cement as a main component. 102 are bonded with an adhesive 120 to form a cement plywood 110.
For example, an epoxy adhesive is preferably used as the adhesive 120.

In the curved cement plywood forming step, as shown in FIGS. 2 (a) and 2 (b), pressure is applied to both plate surfaces 111; 112 of the cement plywood 110 so that both plate surfaces 111; 112 of the cement plywood 110 are curved. To form.
For example, after one plate surface 111 of the cement plywood 110 (= one plate surface 101 of the other cement plate 100 b) is placed on the molding surface 138 of the lower mold 131 of the molding die 130, the upper die 132 of the molding die 130. By pressing (pressing) the other plate surface 112 of the cement plywood 110 (= the other plate surface 102 of the one cement plate 100a) with the molding surface 137, pressure is applied to both plate surfaces 111; 112 of the cement plywood 110. Is added to form both the plate surfaces 111 and 112 of the cement plywood 110 into curved surfaces.
The mold 130 is, for example, formed in a curved surface having a central line 136 parallel to the short side 135; 135 passing through the center between the short side 135 and the short side 135 facing each other in a rectangular plane. A lower mold 131 having a molding surface 138 (see FIG. 3), and an upper mold 132 having a molding surface 137 formed on a curved surface corresponding to the curved surface of the molding surface 138 of the lower mold 131. A curved mold is used.
For example, by continuing to apply pressure to both the plate surfaces 111; 112 of the cement plywood 110 from the state where the adhesive 120 is not solidified until the adhesive 120 is completely solidified, as shown in FIG. Such a curved cement plywood 60 is manufactured.

  In the curved cement plywood 60 formed as described above, as shown in FIGS. 4A and 4B, a curved surface 141 having a smaller diameter is formed into a curved surface by the other plate surface 102 of one cement plate 100a. A curved surface 142 having a larger diameter is formed into a curved surface by one plate surface 101 of the other cement plate 100b, and a curved surface 143 formed by one plate surface 101 of the one cement plate 100a and the other of the other cement plate 100 The curved surface 144 formed by the plate surface 102 is joined by the adhesive 120.

As described above, both the plate surfaces 111; 112 of the cement plywood 110 in a state where the one plate surface 101 of the one cement plate 100 a and the other plate surface 102 of the other cement plate 100 b are joined by the adhesive 120. When the pressure is applied, a tensile force F11 along the plate surface 101 is applied to one plate surface 101 side of the other cement plate 100b to form the plate surface 101 into a curved surface 142, and one cement surface A compression force F21 along the plate surface 102 is applied to the other plate surface 102 side of the plate 100a to form the plate surface 102 into a curved surface 141, and the one plate surface 101 side of one cement plate 100a A tensile force F12 along the plate surface 101 is applied to form the plate surface 101 into the curved surface 143, and the other cement plate 100b has the other plate surface 102 side. The plate surface 102 is formed in a curved 144 subjected to any compressive force F22 along the surface 102. The curved cement plywood 60 having a configuration in which the curved surfaces of the one cement plate 100 a and the other cement plate 100 b are curved is maintained by the solidification of the adhesive 120.
In other words, the force to return the bent state of one cement plate 100a (or the other cement plate 100b) to the flat plate state is blocked by the force bending the other cement plate 100b (or one cement plate 100a). By doing so, a curved cement plywood 60 in which the curved surface is maintained is configured.

  According to the method for manufacturing a curved cement plywood according to Embodiment 1, pressure is continuously applied to both plate surfaces 111; 112 of the cement plywood 110 in which the surfaces of the pair of cement plates 100; 100 are bonded to each other with an adhesive. Since 120 is completely solidified, it is possible to easily manufacture the curved cement plywood 60 in which the curved surface state is firmly maintained.

  According to the method for manufacturing a curved cement plywood according to the first embodiment, the plate surfaces of the pair of cement plates 100; 100 are bonded together with an adhesive to form the cement plywood 110, and then the plate surface of the cement plywood 110 is pressed by pressing. Since it is only formed into a curved surface, a special material is not used, a special manufacturing process is not required, and a method for manufacturing the curved cement plywood 60 excellent in terms of manufacturing management, manufacturing time, and manufacturing cost can be provided.

Embodiment 2
In the first embodiment, the curved cement plywood is manufactured by bonding two cement boards with an adhesive, but the curved cement plywood may be manufactured by bonding together the plate surfaces of three or more cement boards with an adhesive.

Embodiment 3
You may manufacture the curved-surface cement plywood of the structure which interposed the reinforcing material between the board surface of a cement board, and the board surface of a cement board.
In this case, for example, a reinforcing sheet such as a carbon fiber sheet may be used as the reinforcing material.
In Embodiment 3, a curved cement plywood reinforced with a reinforcing material can be manufactured.

Example 1
Next, with reference to FIGS. 5 to 10, a method and structure for reinforcing the block material stacking tunnel lining using the curved cement plywood 60 manufactured by the above-described curved cement plywood manufacturing method of the present invention will be described. .
As shown in FIG. 5, the block material stacking tunnel lining portion 1 is a tunnel lining portion formed by stacking block materials 2A such as bricks 2, concrete blocks and stones on the inner surface of the tunnel.
The reinforcing method of the block material stacking tunnel lining portion 1 (hereinafter simply referred to as “lining portion 1”) includes a groove forming step, a reinforcing plate positioning member fixing step, and a reinforcing plate fixing step.
In the groove forming step, a semicircular arc-shaped groove 4 extending along the circumferential direction of the inner surface 3 perpendicular to the tunnel extending direction (tunnel central axis) of the inner surface 3 is formed on the upper side of the inner surface 3 of the lining portion 1. A plurality are formed at predetermined intervals along the tunnel extension direction.
In the reinforcing plate positioning member fixing step, the reinforcing plate positioning member 5 extending along the circumferential direction of the inner surface 3 is fixed to the lining portion 1 in each groove 4 formed in the groove forming step.
In the reinforcing plate fixing step, the reinforcing plate 6 is installed so as to cover the inner surface 3 between the adjacent reinforcing plate positioning members 5; 5 fixed at a predetermined interval along the tunnel extending direction, and the lining portion The reinforcing plate 6 is fixed to the lining portion 1 so as to cover the entire upper side of the inner surface 3 of 1.

That is, as shown in FIGS. 6 and 7, the reinforcing structure of the lining portion 1 is formed along the circumferential direction of the inner surface 3 on the inner surface 3 of the upper portion of the lining portion 1 and predetermined along the tunnel extending direction. A plurality of grooves 4 formed at intervals, a fixing means 10 (see FIG. 8) provided in each of the plurality of grooves 4 and a filler 7 for fixing filled in the grooves 4 (see FIG. 9). The reinforcing plate positioning member 5 fixed to the lining portion 1 by the above and the reinforcing plate positioning member 5 and the reinforcing plate positioning provided respectively in the grooves 4; 4 adjacent to each other at a predetermined interval along the tunnel extending direction. Both ends 69; 69 (both ends in the tunnel extension direction when installed so as to cover the inner surface 3) of the plate installed so as to cover the inner surface 3 with the member 5 are reinforcing plate positioning members Filling solidified by filling the reinforcing plate 5 and the groove 4 7, a reinforcing plate 6 (refer to FIG. 9), a connecting member 80 (described later) connecting the end portion 69 of the reinforcing plate 6 and the reinforcing plate positioning member 5, or a connecting filler 8 (FIG. 9). And other connecting means.
According to the reinforcing structure of the lining portion 1, the inner surface 3 between the reinforcing plate positioning members 5; 5 adjacent to each other fixed to the lining portion 1 at a predetermined interval along the tunnel extending direction is covered. Since the reinforcing plate 6 is fixed to the lining portion 1, the joint material filled in the joint between the bricks 2 and 2 adjacent to each other peels off and falls off, so-called joint thinning phenomenon occurs. The brick 2 can be prevented from falling.

  For example, the groove 4 is formed to have a groove width (length in a direction along the tunnel extension direction) of 200 mm and a groove depth that is the length of one brick layer of the plurality of brick layers of the lining portion 1. The distance between the grooves 4 provided at predetermined intervals along the grooves 4 is 1000 mm. The groove 4 is, for example, a semicircular arc shape that extends along the circumferential direction of the inner surface 3 by the width of the groove 2 along the tunnel extending direction by using a cutter or the like that cuts the brick 2. It is formed by removing. For example, the bottom surface 42 of the groove 4 is formed in a curved surface parallel to the curved surface along the circumferential direction of the inner surface 3 of the upper portion of the lining portion 1.

  As the reinforcing plate positioning member 5, for example, an H-shaped steel 50 is used. That is, for example, an H-section steel 50 formed so that the surfaces of the flanges 51 and 52 of the H-section steel are curved along the extending direction of the H-section steel using a bending machine. For example, the H-section steel 50 formed in the curved surface where the surface of the flanges 51;

As the reinforcing plate 6, a curved cement plywood 60 manufactured by the method of manufacturing a curved cement plywood according to the present invention is used.
In addition, as the curved cement plywood 60, a reinforcing sheet (reinforcing material) such as a carbon fiber sheet is located on one plate surface side (for example, FIG. 4B) where the curved cement plywood 60 is out of the center position in the thickness direction. The configuration in which the curved sheet cement plywood 60 is sandwiched in layers so as to be positioned on the smaller curved surface 141 side of the curved cement plywood 60, in other words, the position where the fiber sheet is biased to one plate surface side of the curved cement plywood 60 (bias The curved cement plywood 60 having a configuration arranged at a centered position) is used, and the curved cement plywood 60 is installed so that a tensile force is applied to one plate surface side of the curved cement plywood 60. A strong reinforcing plate 6 can be configured. That is, the curved cement plywood 60 is a cement-based member and has a property of being strong against compression and weak against tension. Therefore, the curved cement plywood 60 has a small diameter (for example, the curved cement plywood 60 shown in FIG. 4B). The curved surface so that a tensile force is applied to the other curved surface 141 side and a compressive force is applied to the other plate surface side (for example, the curved surface 142 side having the larger diameter of the curved cement plywood 60 shown in FIG. 4B). By installing the cement plywood 60, when a tensile force is applied to one plate surface side, the reinforcing sheet plays the role of a reinforced concrete reinforcing bar (tensile member), and the curved cement plywood 60 is strong against the tensile force.
The curved surface 142 of the curved cement plywood 60 having the larger diameter is directed toward the inner surface 3 of the lining portion 1, and the curved surface 141 of the curved cement plywood 60 having the smaller diameter is directed to the tunnel cavity 11 (see FIG. 5). ), The curved cement plywood 60 is fixed to the lining part 1 so as to cover the inner surface 3 so that a force is applied to the lining part 1 from the mountain side, and the smaller diameter of the curved cement plywood 60 is When a tensile force is applied to the curved surface 141 side, the reinforcing plate 6 having a high tensile strength with respect to the tensile force can be configured.
That is, the curved cement plywood 60 configured such that a reinforcing sheet (reinforcing material) is sandwiched between the plate surfaces of the cement plates 100; 100 having different thickness dimensions and the reinforcing sheet is positioned on the curved surface side having a smaller diameter. Manufactured or using three or more cement plates 100 having the same thickness dimension, a reinforcing sheet is sandwiched between the plate surfaces of any pair of cement plates 100; 100, and the reinforcing sheet is placed on the curved surface side with the smaller diameter. By manufacturing the curved cement plywood 60 configured to be positioned, the curved cement plywood 60 strong against tensile force can be manufactured.

The reinforcing plate positioning member fixing step includes a reinforcing plate positioning member both ends fixing step and a reinforcing plate positioning member whole fixing step.
In the reinforcing plate positioning member both ends fixing step, as shown in FIG. 8, fixing means 10 for fixing the reinforcing plate positioning member 5 to the lining portion 1 is provided at both ends in the circumferential direction of the inner surface 3 in each groove 4. Use.
The fixing means 10 is, for example, a member-side connection fixed by welding or the like to one end portion in the longitudinal direction of the H-section steel 50 as the reinforcing plate positioning member 5 positioned at the circumferential end portion of the inner surface 3 in the groove 4. And a groove-side connecting portion 13 that is fixed to the lining portion 1 and connected to the member-side connecting portion 12.

  The groove side connecting portion 13 has a first face plate portion 15 facing the terminal surface 41 of the groove 4 and a second face plate portion 16 facing the bottom surface 42 of the groove 4 at the circumferential end of the inner surface 3 in the groove 4. The angled connecting plate 17, the anchor 18 for fixing the second face plate portion 16 to the lining portion 1, and the screw hole 19 formed in the first face plate portion 15 are fastened to the first face plate portion 15. And a nut 22 that is fastened to the bolt 20 that is passed through the bolt through hole 21 formed in the member side connecting portion 12 and connects the member side connecting portion 12 and the first face plate portion 15.

In the reinforcing plate positioning member fixing step, first, angled connecting plates 17 are provided on both ends in the circumferential direction of the inner surface 3 of the groove 4, and the surface of the first face plate portion 15 of the angled connecting plate 17 is used as the end surface of the groove 4. The fixing anchor 18 is driven through the through-hole 23 formed in the second face plate portion 16 so that the surface of the second face plate portion 16 and the bottom face 42 of the groove 4 are in contact with each other. Then, the angle-shaped connecting plate 17 is fixed to both ends in the circumferential direction of the inner surface 3 in the groove 4. Then, the first face plate portion of the angle-shaped connecting plate 17 is inserted into the bolt through hole 21 of the member-side connecting portion 12 fixed to one end portion of the reinforcing plate positioning member 5 positioned on both ends in the circumferential direction of the inner surface 3 in the groove 4. By fastening the nut 22 to the bolt 20 through the bolt 20 projecting from 15, one end side of each reinforcing plate positioning member 5: 5 positioned on each end side in the circumferential direction of the inner surface 3 in each groove 4 is each groove 4 is fixed to each end of the inner surface 3 in the circumferential direction. Then, as shown in FIG. 5, one or a plurality of reinforcing plate positioning members 5 that are positioned on the center side in the circumferential direction of the inner surface 3 in the groove 4 are arranged on each end side in the circumferential direction of the inner surface 3 in each groove 4. A plurality of reinforcing plate positioning members 5 are installed along the circumferential direction of the inner surface 3 in each groove 4 by connecting to the other end side of each reinforcing plate positioning member 5; 5 to be positioned via a connecting member 25.
The connecting member 25 includes, for example, an additional plate 26 provided so as to straddle the flanges 51; 52 and the web 54 at the ends of the adjacent reinforcing plate positioning members 5; 5; 5 end flanges and fixing means 27 such as bolts and nuts for fixing to the web.
For each of the grooves 4, a semicircular arc-shaped H-shaped steel 50 having a length straddling both ends in the circumferential direction of the inner surface 3 of the groove 4 is installed and covered as the reinforcing plate positioning member 5. You may fix to the construction part 1. In this case, the connecting member 25 becomes unnecessary.

Then, as shown in FIG. 9A, for example, mortar 7 </ b> A as a fixing filler 7 is sprayed into the groove 4 in a state where the reinforcing plate positioning member 5 is fixed to the lining portion 1. And the same plane is formed with the surface 71 and the inner surface 3 of the sprayed mortar 7A, and solidification of the sprayed mortar 7A is awaited.
Further, a backing material such as mortar as a filling material 79 is injected between the groove bottom 42 of the groove 4 and the other flange 52 of the H-shaped steel 50, and the solidification of the filling material 79 is awaited. The filler 79 forms an injection path (not shown) from the mountain side of the lining portion 1 and is injected through the injection path.
As described above, the reinforcing plate positioning member 5 is fixed to the lining portion 1 with the fillers 7 and 79. In this way, the back surface 72 of one flange 51 positioned on the side of the tunnel cavity 11 of the H-shaped steel 50 as the reinforcing plate positioning member 5 fixed to the lining portion 1 where the groove 4 is formed is solidified. The distance between the surface 71 of the mortar 7A and the mortar 7A is formed to have the same size as the board thickness of the reinforcing plate 6 so that the end 69 of the reinforcing plate 6 can enter.

In the reinforcing plate fixing step, the inner surface 3 between the two reinforcing plate positioning members 5; 5 installed at predetermined intervals along the tunnel extending direction is installed so as to be covered with the plurality of reinforcing plates 6, The plurality of reinforcing plates 6 are fixed to the covering portion 1 so that the entire inner surface 3 between the reinforcing plate positioning members 5; 5 on the inner surface 3 on the upper side of the working portion 1 is covered with the plurality of reinforcing plates 6. In this case, as shown in FIG. 6; FIG. 10, on the inner surface 3 between the reinforcing plate positioning members 5; 5 provided so as to be adjacent to each other along the tunnel extending direction, The end faces 67 of the reinforcing plate 6 in the circumferential direction of the tunnel 67 are attached to each other so that the plurality of reinforcing plates 6 are arranged along the circumferential direction of the inner surface 3.
That is, both ends 69; 69 of the reinforcing plate 6 provided between the two reinforcing plate positioning members 5; 5 installed at a predetermined interval along the tunnel extending direction are connected to the reinforcing plate positioning member. 5 is inserted between the back surface 72 of one flange 51 and the front surface 71 of the solidified mortar 7A. At this time, one end 69 of the curved cement plywood 60 as the reinforcing plate 6 is inserted between the back surface 72 of the flange 51 of the one reinforcing plate positioning member 5 and the surface 71 of the solidified mortar 7A. In a state where the edge of one end portion 69 of 60 is abutted against the web 54 of one reinforcing plate positioning member 5 and the plate surface (curved surface) on the other end portion 69 side of the curved cement plywood 60 is pressed against the inner surface 3. The curved cement plywood 60 is moved to the other reinforcing plate positioning member 5 side and inserted between the back surface 72 of one flange 51 of the other reinforcing plate positioning member 5 and the surface 71 of the solidified mortar 7A. In this way, one end 69 side of the curved cement plywood 60 is positioned between the back surface 72 of one flange 51 of the one reinforcing plate positioning member 5 and the surface 71 of the solidified mortar 7A and the curved cement plywood. The other end 69 side of 60 is located between the back surface 72 of one flange 51 of the other reinforcing plate positioning member 5 and the surface 71 of the solidified mortar 7A. That is, both ends 69; 69 of the plate of the reinforcing plate 6 are a curved surface which is the back surface 72 of one flange 51 of the H-shaped steel 50 as the reinforcing plate positioning member 5 and a mortar 7A which is a solidified filler. Located between.

Next, the end portion 69 of the reinforcing plate 6 and the reinforcing plate positioning member 5 are connected using the connecting tool 80. For example, as shown in FIG. 9A, the connector 80 includes screw holes 81 that are through holes formed in four corner portions of the board surface of the reinforcing plate 6 and one flange 51 of the reinforcing plate positioning member 5. The second plate portion 83 includes a first plate portion 82 that contacts the surface of the first plate 82 and a second plate portion 83 that contacts the surface 63 of the reinforcing plate 6, and a screw hole 84 that penetrates the second plate portion 83. A formed reinforcing plate pressing plate 85 and a bolt 86 are provided. Then, the bolts are brought into contact with the surface of the first plate portion 82 and the surface 87 of the one flange 51 and with the surface of the second plate portion 83 and the board surface 63 as the surface of the reinforcing plate 6 in contact. 86 is inserted into the screw hole 84; 81, and the tip of the bolt 86 is brought into contact with the solidified surface 71 of the mortar 7 A so that one flange 51 is sandwiched between the first plate portion 82 and the reinforcing plate 6. Thus, the end 69 of the reinforcing plate 6 and the flange 51 are connected. In this case, since both ends 69; 69 of the reinforcing plate 6 in the tunnel extending direction are hidden behind the one flange 51; 51 of the reinforcing plate positioning member 5, both ends 69 of the reinforcing plate 6 in the tunnel extending direction are hidden. ; 69 becomes a single curved line that is the end edge of the flange 51.
As described above, as shown in FIG. 9A, the reinforcing structure of the lining portion 1 is completed.

According to the reinforcement structure of the lining part 1 according to the usage example 1, since the reinforcing material 6 is provided on the inner surface 3 of the lining part 1, it is possible to prevent the brick 2 from falling when a joint thinning phenomenon occurs.
Further, according to the first use example, the reinforcing plate 6 can be securely fixed to the lining portion 1 by the fixing means 10, the fixing filler 7, and the coupler 80, and both the reinforcing plate 6 in the tunnel extending direction can be fixed. Since the end portion 69; 69 appears as one curved line that is the end edge of the flange 51, the end surfaces of the reinforcing plates 6 adjacent to each other in the circumferential direction of the inner surface 3 can be easily aligned on one line. Therefore, it is possible to provide a reinforced structure excellent in aesthetics.

Example 2
As shown in FIG.9 (b), it is good also as a structure using the filler 8 as a connection means. In this case, one flange 51 located on the side of the tunnel cavity 11 of the H-shaped steel 50 is formed with an injection port 53 that is a through-hole penetrating the flange 51.
For example, as shown in FIG. 9A, in a state where the reinforcing plate 6 is connected to the flange 51 by the connecting tool 80, as shown in FIG. When the mortar 8A as the filler 8 is injected between the back surface 72 of the flange 51 and the surface 71 of the sprayed mortar 7A and the mortar 8A is solidified, the end portion 69 of the reinforcing plate 6 becomes the reinforcing plate positioning member. 5 is firmly fixed to the back surface 72 of one flange 51 and the front surface 71 of the solidified mortar 7A in a fixed state, and the reinforcing plate 6 is firmly fixed to the lining portion 1 so as to cover the inner surface 3. . That is, both ends 69; 69 of the plate of the reinforcing plate 6 are a curved surface which is the back surface 72 of one flange 51 of the H-shaped steel 50 as the reinforcing plate positioning member 5 and a mortar 7A which is a solidified filler. Located between.
After the mortar 8A is solidified and the reinforcing plate 6 is fixed to the cover portion 1 so as to cover the inner surface 3, the bolt 86 is removed and the reinforcing plate pressing plate 85 is removed.
As described above, as shown in FIG. 9B, the reinforcing structure of the lining portion 1 is completed.

  According to the usage example 2, the reinforcing plate 6 can be more firmly fixed to the lining portion 1 by the filler 8 as the connecting means, and both ends 69; 69 of the reinforcing plate 6 in the tunnel extending direction are provided. Since it looks like one curved line that is the end edge of the flange 51, the end surfaces of the reinforcing plates 6 adjacent to each other in the circumferential direction of the inner surface 3 can be easily aligned on one line, and further the reinforcement Since there is no object that is scattered and exposed on one board surface 63 (surface) of the plate 6, a reinforcing structure that is more aesthetically pleasing can be provided.

Example 3
In the usage examples 1 and 2, the example in which the H-shaped steel 50 is used as the reinforcing plate positioning member 5 is shown. However, as the reinforcing plate positioning member 5, the other flange 52 of the H-shaped steel 50 in the usage examples 1 and 2 is used. The removed T-shaped steel 50A having a T-shaped cross section as shown in FIG. 11 may be used. That is, the T-shaped steel 50 </ b> A formed on the curved surface that matches the curved surface along the circumferential direction of the inner surface 3 of the upper portion of the lining portion 1 is used as the reinforcing plate positioning member 5.
In the case of the usage example 3, after inserting the web 54A of the T-shaped steel 50A as the reinforcing plate positioning member 5 into the groove 4, the T-shaped steel 50A is covered by filling the groove 7 with a filler 7 such as a mortar 7A. Fix to part 1. That is, both ends 69; 69 of the plate of the reinforcing plate 6 have a curved surface which is the back surface 72 of one flange 51 of the T-shaped steel 50A as the reinforcing plate positioning member 5 and a mortar 7A which is a solidified filler. Located between. And the reinforcement board 6 is fixed to the lining part 1 using the connector 80 like Embodiment 1 (refer Fig.11 (a)), or the reinforcement board 6 using the filler 8 like the usage example 2. FIG. Is fixed to the lining portion 1 (see FIG. 11B).
According to the usage example 3, the operation | work which inject | pours backing materials, such as mortar as the filler 79, from the mountain side of the lining part 1 through the injection path outside a figure can be eliminated. In addition, since the groove width of the groove 4 can be reduced, work effort and work efficiency for forming the groove 4 can be improved.

  In addition, what is necessary is just to use cement-type compositions, such as the mortar mentioned above or concrete, as the filler 7; 8; 79 mentioned above.

  Moreover, although the example using shape steel, such as H-section steel 50 and T-section steel 50A, was shown as the reinforcement board positioning member 5, things other than shape steel may be used.

  The curved cement plywood manufactured according to the present invention can be applied to reinforcement of the inner wall of tunnel lining concrete, the outer wall of a building, for example, in addition to the reinforcement of the block material stacking tunnel lining described in the above-described use examples. It is.

60 Curved cement plywood, 100a (100) One cement board,
100b (100) The other cement board, 110 cement plywood.

Claims (3)

Forming a cement plywood by adhering a plate surface of one cement plate formed on a flat plate mainly containing cement and a plate surface of the other cement plate formed on a flat plate mainly containing cement with an adhesive; and ,
From the state where the adhesive is not solidified until the adhesive is solidified, by continuously applying pressure to both plate surfaces of the cement plywood, the step of forming the plate surface of the cement plywood into a curved surface;
A method for producing a curved cement plywood, comprising:   2. The method for producing a curved cement plywood according to claim 1, wherein a curved cement plywood having a configuration in which a reinforcing material is interposed between the plate surface of the cement plate and the plate surface of the cement plate is manufactured.   The method for producing a curved cement plywood according to claim 2, wherein the curved cement plywood is manufactured such that the reinforcing material is positioned on the curved surface having the smaller diameter.

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