JP2013036172A - Moisture retention curing layer fitting structure for tunnel covering concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture retention curing layer fitting structure that has simple constitution, can be attached to and detached from an inner peripheral surface of covering concrete through simple operation, and is used to arrange a moisture retention curing layer in contact with the inner peripheral surface of the covering concrete.SOLUTION: The moisture retention curing layer fitting structure comprises an arched frame structure 11 and a fixed support member 12, and the arched frame structure 11 comprises an upper frame structure 11a and a pair of side-part frame structures 11b. The upper frame structure 11a and side-part frame structures 11b can be bent through hinge coupling parts 15 and also fixed successively in a peripheral direction along an arched part of a tunnel 20. The hinge coupling parts 15 are formed by coupling upper joint metallic material 16 and lower joint metallic material 17, which are provided at lower end parts of the upper frame structure 11a and upper end parts of the side-part frame structures 11b and including abutting face parts 16a, 17a respectively, with pins rotatably in an inner region of the arched frame structure 11.

Description

  The present invention relates to a tunnel covering for disposing a moisturizing and curing layer for curing a lining concrete formed so as to cover an inner wall surface of an arch-shaped portion of a tunnel in a wet state, in close contact with the inner peripheral surface of the lining concrete. It relates to a moisturizing and curing layer mounting structure for engineered concrete.

  In tunnel construction such as a mountain tunnel, for example, after tunnel excavation, concrete is sprayed on the inner wall of the tunnel to perform primary lining, and then a tunnel lining formwork is installed. Generally, lining concrete having a predetermined thickness is formed by placing concrete in a space between the tunnel and the inner wall surface of the tunnel.

  In addition, the lining concrete formed to cover the inner wall surface of the tunnel will be cracked due to drying shrinkage if left as it is after demolding, and the quality will deteriorate. Various techniques have been developed to prevent cracking by preventing the lining concrete from drying by maintaining it in a wet state (see, for example, Patent Document 1 and Patent Document 2).

JP 2010-19067 A JP 2010-180589 A

  However, in the curing device described in Patent Document 1, the cylindrical shell structure for arranging the moisture-retaining layer in close contact with the inner peripheral surface of the lining concrete of the arch-shaped portion of the tunnel is H-shaped steel or channel-shaped steel. Etc., and the structure is complicated because it holds the moisturizing and curing layer pressed against the inner peripheral surface of the lining concrete using a jack mechanism attached to the mobile stand. And it becomes expensive.

  In the curing system described in Patent Document 2, the support frame for arranging the moisture retention layer in close contact with the inner peripheral surface of the lining concrete of the arch-shaped portion of the tunnel is, for example, a flexible made of vinyl chloride. Since it is formed using a pipe and can be deformed along the inner peripheral surface of the arch-shaped part of the tunnel, it can be easily and lightly formed, and even without a lifting device (moving platform) It is possible to hold the moisturizing curing layer in a state of being pressed against the inner peripheral surface of the lining concrete. However, the support frame of Patent Document 2 uses the elastic urging force of the flexible pipe to lay the moisturizing curing layer on the lining concrete. Since it is pressed against the inner peripheral surface of the tunnel, it is made to follow the inner peripheral surface of the lining concrete while curving the support frame on both sides of the arch-shaped part of the tunnel with a small curvature. Together require much labor to work accurately placed, it takes a considerable force when removing the installed support frame, it is difficult to perform a detaching operation smoothly.

  The present invention has a simple configuration, can be accurately installed along the inner peripheral surface of the lining concrete by a simple operation, and can be smoothly removed from the inner peripheral surface of the lining concrete by a simple operation. An object of the present invention is to provide a moisturizing / curing layer mounting structure for tunnel lining concrete for disposing a moisturizing / curing layer in close contact with the inner peripheral surface of the lining concrete.

  The present invention relates to a moisture retention curing for arranging a moisturizing curing layer for curing a lining concrete formed covering an inner wall surface of an arch-shaped portion of a tunnel in a wet state, in close contact with the inner peripheral surface of the lining concrete. A layer mounting structure, wherein the arch-shaped frame structure is installed between a lower end portion of the arch-shaped frame structure and a bottom base portion of a tunnel, and the arch-shaped frame structure is placed on the lining concrete. A fixed support member that is fixed along the inner peripheral surface of the arch-shaped frame structure, and the arch-shaped frame structure includes a plurality of circumferential frames extending in the circumferential direction of the arch-shaped portion of the tunnel. And a plurality of connecting frame members that connect these circumferential frame members in the tunnel extension direction. An upper frame structure disposed on the upper portion of the shape portion and a pair of side frame structures disposed on both sides of the upper frame structure. The upper frame structure and the side frame structure are The upper frame structure and the side frame structure are provided so as to be able to be bent through a hinge connecting portion and to be fixed in a state of being connected in a circumferential direction along the arch-shaped portion of the tunnel. The hinge connecting part between the upper and lower frame parts is joined together as a single piece via upper joint hardware extending in the tunnel extending direction at the lower end part of the upper frame part of the plurality of circumferential frame members. The upper end portion of the side frame portion of the circumferential frame member is joined as a unit via a lower joint hardware extending in the tunnel extension direction, and the upper joint hardware and the lower joint hardware The upper joint metal and the lower joint metal are configured to be pivotally coupled with each other, and the upper joint structure and the lower joint structure are arranged along the arch-shaped portion of the tunnel. Each having an upper abutment surface portion and a lower abutment surface portion that are opposed to each other in the circumferential direction when continuously provided in the circumferential direction, and the upper and lower bonding hardware, and / or Or a plurality of upper coupling pieces and lower coupling pieces provided to project from the ends of the upper frame part and the side frame part joined to these to the inside of the arch-shaped frame structure. The upper coupling piece and the lower coupling piece are pin-coupled so as to be rotatable in the inner region of the arch-shaped frame structure, and the arch-shaped frame structure is mounted using the fixed support member. When fixed, the upper abutment surface portion and the lower abutment surface portion are in close contact with each other, so that the upper frame structure and the side frame structure are surrounded along the arch-shaped portion of the tunnel. The above object is achieved by providing a moisturizing and curing layer mounting structure for tunnel lining concrete that is continuously provided in the direction.

  The tunnel lining concrete moisturizing and curing layer mounting structure of the present invention has positioning engagement holes formed at positions matching each other on the upper contact surface portion and the lower contact surface portion. It is preferable that the upper abutment surface portion and the lower abutment surface portion are aligned and brought into close contact with each other by mounting the engagement member with the positioning engagement holes being matched.

  Further, in the moisturizing and curing layer mounting structure for tunnel lining concrete of the present invention, a positioning engagement hole is formed in one of the upper contact surface portion and the lower contact surface portion, and the upper contact surface On the other of the surface portion and the lower contact surface portion, a positioning convex portion that is fitted into the positioning engagement hole is provided at a position that matches the positioning engagement hole. It is preferable that the positioning contact portion is attached so that the upper contact surface portion and the lower contact surface portion are aligned and in close contact with each other.

  Furthermore, in the moisture-protecting layer mounting structure for tunnel lining concrete of the present invention, a plurality of the upper joint pieces and a plurality of the lower joint pieces extend in parallel with the upper joint hardware and the lower joint hardware. It is preferable that the same straight bar-shaped pin member is pin-coupled at a plurality of joint locations.

  According to the moisturizing and curing layer mounting structure for tunnel lining concrete for arranging the moisture and curing layer of the present invention in close contact with the inner peripheral surface of the lining concrete, it has a simple structure and can be covered by a simple operation. It can be accurately installed along the inner peripheral surface of the concrete, and can be smoothly removed from the inner peripheral surface of the lining concrete by a simple operation.

It is a cross-sectional view of a tunnel showing a moisturizing and curing layer mounting structure for tunnel lining concrete according to a preferred embodiment of the present invention in a state of being fixed along the inner peripheral surface of the lining concrete. It is a side view which shows the moisture retention layer attachment structure of the tunnel lining concrete which concerns on preferable one Embodiment of this invention in the fixed state. (A) is the expansion exploded view of the B section of FIG. 2, (b) is the side view which looked at (a) from the left side. (A) is the enlarged front view of the A section of FIG. 1, (b) is the side view which looked at (a) from the right side. It is sectional drawing explaining the state which fitted the positioning engagement hole each formed in the upper side contact surface part and the lower side contact surface part, and mounted | worn the engagement member. It is an expanded schematic sectional drawing explaining the structure of a moisture retention curing layer.

  The tunnel lining concrete moisturizing and curing layer mounting structure 10 according to a preferred embodiment of the present invention is movable in, for example, a tunnel 20 in a tunnel construction for constructing a mountain tunnel, for example, as shown in FIG. A tunnel lining formwork (not shown) installed using a known mobile centile (not shown) and an inner wall surface 20a of the tunnel 20 covered with a primary lining 21 preferably made of sprayed concrete When the lining concrete 22 of the arch-shaped portion of the tunnel 20 formed by placing concrete in the space between them is wet-cured after removing the tunnel lining formwork, A simple support structure that is easy to attach and detach, in order to dispose the moisturizing and curing layer 26 attached so as to cover the peripheral surface 22a in close contact with the inner peripheral surface 22a. It is those that have been adopted by.

  The tunnel lining concrete moisturizing and curing layer mounting structure 10 of the present embodiment includes the moisture aging and curing layer 26 for curing the lining concrete 22 formed so as to cover the inner wall surface 20a of the arch-shaped portion of the tunnel 20 in a wet state. , A support structure for being disposed in close contact with the inner peripheral surface 22a of the lining concrete 22, and as shown in FIGS. 1 and 2, the arched frame structure 11 and the arched frame structure 11 A fixed support member 12 installed between the lower end portion and the bottom plate portion 20b of the tunnel 20 and fixing the arch-shaped frame structure 11 along the inner peripheral surface 22a of the lining concrete 22; It is configured to include.

  The arch-shaped frame structure 11 includes a plurality of circumferential frame members 13 extending in the circumferential direction of the arch-shaped portion of the tunnel 20, and a plurality of couplings that connect these circumferential frame members 13 in the extending direction of the tunnel. The arch-shaped frame structure 11 is disposed on both sides of the upper frame structure 11a and the upper frame structure 11a disposed on the arch-shaped portion of the tunnel. The upper frame structure 11a and the side frame structure 11b can be bent via the hinge connecting portion 15 and along the arch-shaped portion of the tunnel 20. It is provided so that it can be fixed in a state of being continuously provided in the circumferential direction.

  As shown in FIGS. 3A and 3B and FIGS. 4A to 4C, the hinge connecting portion 15 between the upper frame structure 11a and the side frame structure 11b has a plurality of peripheral portions. The lower end portion of the upper frame portion 13a of the directional frame member 13 is joined together via an upper joint metal 16 extending in the tunnel extending direction, and the upper ends of the side frame portions 13b of the plurality of circumferential frame members 13 The upper joint metal 16 and the lower joint metal 17 are connected to each other through a lower joint metal 17 that extends in the direction in which the tunnel extends, and the upper joint metal 16 and the lower joint metal 17 are pivotally coupled to each other.

  The upper joint hardware 16 and the lower joint hardware 17 are arranged in the circumferential direction when the upper frame structure 11a and the side frame structure 11b are continuously provided along the arch-shaped portion of the tunnel 20 in the circumferential direction. An upper contact surface portion 16a and a lower contact surface portion 17a that face each other and contact each other, and each of the upper frame portion 13a and the side frame portion 13b that are bonded to the upper bonding hardware 16 and the lower bonding hardware 17 are provided. A plurality of upper coupling pieces 16b and lower coupling pieces 17b provided to extend from the end to the inside of the arch-shaped frame structure 11, each including an upper coupling piece 16b and a lower coupling piece 17b, A pin is rotatably connected in the inner region of the arch-shaped frame structure 11 (see FIG. 1), and when the arch-shaped frame structure 11 is fixed using the fixed support member 12, A state in which the upper frame structure 11a and the side frame structure 11b are continuously provided in the circumferential direction along the arch-shaped portion of the tunnel 20 because the contact surface portion 16a and the lower contact surface portion 17a are in close contact with each other. It is formed to become.

  Further, in the present embodiment, a plurality of upper coupling pieces 16b and a plurality of lower coupling pieces 17b are formed by the same straight bar-shaped pin member 18 extending in parallel with the upper bonding hardware 16 and the lower bonding hardware 17. It is pin-coupled at the joint location.

  In the present embodiment, as shown in FIGS. 1 and 2, the arch-shaped frame structure 11 includes a fiber reinforced plastic (FRP) pipe member having a thickness of about 35 mm, for example, covering the arch-shaped portion of the tunnel 20. A plurality of circumferential frame members 13 obtained by curving into a shape along the inner circumferential surface 22a of the engineered concrete 22, and these circumferential frame members 13 are connected in the extending direction of the tunnel 20, for example, circumferential It is formed by joining a plurality of connecting frame members 14 made of FRP pipe members having a thickness of about 35 mm similar to the direction frame member 13, and joining these intersections to each other via an adhesive or welding. Yes. Moreover, in this embodiment, the connection frame member 14 can be preferably attached so that the circumferential frame members 13 may be connected and integrated every 5 to 15 pieces. In the present embodiment, the plurality of circumferential frame members 13 are arranged at a pitch of, for example, about 800 to 1000 mm in the extending direction of the tunnel 20, and the plurality of connecting frame members 14 are arranged in the circumferential direction of the tunnel 20. For example, the arch-shaped frame structures 10 are assembled so as to have a length in the extending direction of the tunnel 20 of, for example, about 10.5 m.

  In the arch-shaped frame structure 11, each circumferential frame member 13 constituting the arch-shaped frame structure 11 is divided into an upper frame portion 13a and a pair of side frame portions 13b on both sides thereof. The lower end portions on both sides of the plurality of upper frame portions 13a are joined together through an upper joint metal 16 made of lightweight channel steel having a width of about 60 mm, for example, extending in the extending direction of the tunnel 20 (see FIG. 3 (a), (b), FIG. 4 (a), (b)), the upper ends of the plurality of side frame portions 13b are extended in the extending direction of the tunnel 20, for example, a light weight of about 60 mm in width. By joining together via the lower joint metal 17 made of channel steel (see FIGS. 3A, 3B, 4A, 4B), the upper frame structure 11a and a pair of both sides Side frame structure 11b of And a 3 divided configuration (see Figure 1).

  In the present embodiment, as shown in FIG. 2, the upper joint metal 16 and the side joint metal 17 are preferably the upper frame part 13 a and the side frame part of the circumferential frame member 13, similarly to the connection frame member 14. 13b is attached so as to be joined and integrated every 5 to 15 pieces.

  Moreover, in this embodiment, the inner peripheral surface 22a of the lining concrete 22 formed in the arch-shaped part of the tunnel 20 is formed so that the curvature changes at the upper part and the side part of the arch-shaped part. In the frame-like frame structure 11, the upper frame portion 13a constituting the upper frame structure 11a and the side frame portion 13b constituting the side frame structure 11b are curved in response to such a change in curvature. In addition, the hinge connecting portion 15 is preferably disposed at the inflection point portion of the arch-shaped portion.

  In this embodiment, the upper frame structure 11a and the side frame structure 11b are connected to the hinge connecting portion 15 as shown in FIGS. 3 (a) and 3 (b) and FIGS. 4 (a) and 4 (b). It is provided so that it can be bent through the cable and can be fixed in a state of being continuously provided in the circumferential direction along the arch-shaped portion of the tunnel 20.

  In other words, in the present embodiment, the upper joint hardware 16 disposed along the lower end portions on both sides of the upper frame structure 10a is connected to the back side groove portion of the lightweight channel steel having a U-shaped cross-sectional shape. In the state where the lower end portions of the plurality of upper frame portions 13a reinforced by 19 are inserted, the lower end portions of the plurality of upper frame portions 13a are fixed integrally by joining via an adhesive or welding, The middle side portion of the U-shaped cross section is arranged as an upper contact surface portion 16a so as to face the circumferential direction of the arch-shaped portion of the tunnel 20. Further, in the present embodiment, a plurality of circular positioning engagement holes 16c are preferably formed at appropriate positions on the upper contact surface portion 16a of the upper joint hardware 16 that avoids the joint portion of the lower end portion of the upper frame portion 13a. Has been.

  The lower joint hardware 17 arranged along the upper end portions of the side frame structures 10b on both sides is reinforced by the sleeve-shaped hardware 19 on the rear side groove portion of the lightweight channel steel having a U-shaped cross-sectional shape. While the upper end portions of the plurality of side frame portions 13b are inserted, the upper end portions of the plurality of side frame portions 13b are fixed together as a result of being joined together through an adhesive or welding. The intermediate side portion of the cross-sectional shape is arranged as a lower contact surface portion 17a so as to face the circumferential direction of the arch-shaped portion of the tunnel 20. Moreover, in this embodiment, it is in the position which agree | coincides with the positioning engagement hole 16c of the upper joint metal fitting 16 in the lower side contact surface part 17a of the lower joint metal fitting 17 which avoided the joining location of the upper end part of the side part frame part 13b. A plurality of preferably circular positioning engagement holes 17c are formed.

  The upper frame structure 11a and the side frame structure 11b are brought into contact with each other while the upper contact surface portion 16a of the upper joint metal piece 16 and the lower contact surface portion 17a of the lower joint metal piece 17 are brought into contact with each other in the circumferential direction. As shown in FIG. 5, the positioning engagement holes 16c of the matching upper joining hardware 16 and the positioning engagement of the lower joining hardware 17 are arranged as shown in FIG. The upper abutment surface portion 16a and the lower abutment surface portion 17a are aligned with high precision so that the upper abutment surface portion 16a and the lower abutment surface portion 17a are not displaced by preferably engaging and locking the engagement member 23 from above so as to straddle the hole 17c. It becomes possible to make the upper bonding hardware 16 and the lower bonding hardware 17 tightly contact in a more stable state.

  Here, in this embodiment, the engaging member 23 is a columnar member having an outer diameter substantially the same as the inner diameter of the circular positioning engaging holes 16c and 17c, and the upper end portion extends outward from the outer peripheral edge portion. The locking flange portion 23a is provided so as to overhang. For example, until the engagement flange 23 is locked to the opening peripheral edge of the positioning engagement hole 16c inside the rear side groove portion of the upper joint hardware 16, the positioning engagement preferably matched from above is performed. By inserting and mounting in the holes 16c and 17c, it is possible to easily and accurately align the upper joint hardware 16 and the lower joint hardware 17.

  In the present embodiment, a reinforcing washer member provided with an insertion hole having an inner diameter similar to that of the positioning engagement holes 16c and 17c is provided inside the back side groove portion of the upper joint metal piece 16 and inside the back side groove portion of the lower joint metal piece 17. 24 are provided so as to reinforce the opening peripheral edge portions of the positioning engagement holes 16c and 17c. In the present embodiment, the matching positioning engagement holes 16c and 17c and the insertion holes of the reinforcing washer member 24 that reinforce them are continuously penetrated so that the engagement member 23 is connected to the locking flange portion 23a on the upper side. It is inserted and mounted until it is locked to the opening peripheral edge portion of the insertion hole of the reinforcing washer member 24 provided on the hardware 16.

  Note that the engaging member 23 is not necessarily a member that is inserted and locked into the matching positioning engagement holes 16c and 17c and the insertion hole of the reinforcing washer member 24. For example, the positioning engagement holes 16c and 17c and the reinforcing washer It may be an engaging member or the like having a male screw formed in the insertion hole of the member 24 and having a male screw screwed onto the member.

  In the present embodiment, among the lower ends of the plurality of upper frame portions 13a joined together through the upper joint hardware 16, for example, a sleeve-like hardware that reinforces the lower ends of every other upper frame portion 13a. 19, an upper coupling piece 16b having a pin insertion hole 16d at the tip is provided so as to extend in the vertical direction.

  On the other hand, among the upper end portions of the plurality of side frame portions 13b joined together through the lower joint hardware 17, for example, the sleeve-like hardware 19 that reinforces the upper end portions of every other side frame portion 13b. A lower coupling piece 17b which is attached as a single body and has a pin insertion hole 17d at the distal end portion is provided extending in the lateral direction.

  The plurality of upper coupling pieces 16b and lower coupling pieces 17b are inserted through the pin member 18 by matching the pin insertion holes 16d and 17d formed in the tip portion with each other in the inner region of the arch-shaped frame structure 11. By locking, the lower joint metal 17 in which the upper ends of the plurality of side frame parts 13b are joined together is changed to the lower joint metal 16 in which the lower ends of the plurality of upper frame parts 13a are joined together. On the other hand, it is possible to couple the pins so as to be rotatable. This also allows the side frame structure 11b of the arch-shaped frame structure 11 to be bent with respect to the upper frame structure 11a via the hinge connecting portion 15 by pin coupling, and to the arch-shaped portion of the tunnel 20 It becomes possible to fix the connection in a state of being continuously provided along the circumferential direction.

  In the present embodiment, in the inner region of the arch-shaped frame structure 11, the upper coupling piece 16 b extending vertically from the lower joint hardware 16 and the inner side of the tunnel 20 from the lower joint hardware 17. The hinge connecting portion 15 is formed by connecting the lower connecting piece 17b extending in the lateral direction toward the substantially L shape. As a result, when the arch-shaped frame structure 11 is fixed using the fixed support member 12, the upper contact surface portion 16a of the upper joint hardware 16 and the lower contact surface portion 17a of the lower joint hardware 17 are connected to each other. The arch-shaped frame structure 11 is made to follow the inner peripheral surface 22a of the lining concrete 22 of the arch-shaped portion of the tunnel 20 by bringing the arch-shaped frame structure 11 into close contact with each other while making surface contact over substantially the entire region. It becomes possible to install in a stable state.

  Further, in the present embodiment, the plurality of upper coupling pieces 16b and the plurality of lower coupling pieces 17b extend in parallel to the upper joining hardware 16 and the lower joining hardware 17 in the corresponding pin insertion holes 16d, 17d. The same linear rod-shaped pin member 18 is inserted and locked to be simultaneously pin-coupled. Accordingly, the rotation of the side frame structure 11b configured by connecting the plurality of side frame portions 13b with respect to the upper frame structure 11a configured by connecting the plurality of upper frame portions 13a is further performed. It becomes possible to carry out in a stable state.

  In the present embodiment, the arch-shaped frame structure 11 is installed between the lower end portion of the arch-shaped frame structure 11 and the bottom board portion 20b of the tunnel 20 so that the arch-shaped frame structure 11 is disposed on the inner peripheral surface 22a of the lining concrete 22. As shown in FIGS. 1 and 2, as the fixed support member 12 that is fixed in a state of being fitted along, for example, a well-known pipe support that is appropriately improved as an expansion / contraction jack can be used. The fixed support member 12 is made of, for example, H-shaped steel, which is installed on the side frame portions 14 on both sides of the bottom plate portion 20b of the tunnel 20 and the connecting frame member 14 attached to the lowermost end portion of the side frame structure 11b. It is installed at a plurality of locations so as to be detachable with the bearing table 25 interposed therebetween.

  For example, these base plate portions 12a are placed in close contact with the bearing table 25 using a plurality of fixed support members 12, and the uppermost locking portions 12b are connected to the lowermost end connecting frames of the arch-shaped frame structure 11. By extending each fixed support member 12 in a state where the member 14 is locked, the arch-shaped frame structure 11 is moved along the inner peripheral surface 20a of the lining concrete 20 of the arch-shaped portion of the tunnel 20 in the circumferential direction. And can be easily fixed.

  That is, the upper contact surface portion 16a of the upper joint hardware 16 at the lower end portion of the upper frame structure 11a and the lower contact surface portion 17a of the lower joint hardware 17 at the upper end portion of the side frame structure 11b are in close contact with each other. At the same time, the engaging member 23 is inserted and locked in the matching positioning engaging holes 16c and 17c, so that the upper frame structure 11a and the side frame structure 11b of the arch-shaped frame structure 11 are connected to the arch of the tunnel 20. In a state of being continuously provided in the circumferential direction along the shape portion, each fixed support member 12 is extended and the arched frame structure 10 is pushed up, so that the moisturizing and curing layer 26 provided on the outer peripheral portion is The arched frame structure 11 can be easily fixed in a state of being in close contact with the inner peripheral surface 22 a of the lining concrete 22. Moreover, the fixed support member 14 and the arched frame structure 11 can be easily removed by shrinking each of the extended fixed support members 12 to release the fixed state.

  In this embodiment, it is supported by the arch-like frame structure 11 installed along the inner peripheral surface 22a of the lining concrete 22, and is disposed in a state of being in close contact with the inner peripheral surface 22a of the lining concrete 22. As shown in FIG. 6, the moisture-retaining and curing layer 26 is disposed on the outside of the substrate layer 26a and a substrate layer 26a having a thickness of about 4 mm, preferably made of plastic cardboard, for imparting shape retention. Preferably, the insulating layer 26b is formed to include a heat insulating layer 26b made of a foaming member such as a sponge having a gap such as closed cells or continuous cells therein, and a moisture retaining mat 26c disposed further outside the heat insulating layer 26b. As the moisture retaining mat 26c, various known moisture retaining mats that can absorb moisture and have physical properties that can retain the absorbed moisture can be used. As the heat and moisture retaining layer composed of the heat retaining layer 26b and the moisture retaining mat 26c, it is possible to use a trade name “Uruon Mat” (manufactured by Fujimori Sangyo Co., Ltd.), which is a commercially available concrete heat and moisture curing mat.

  The moisturizing and curing layer 26 is installed along the inner peripheral surface 22a of the lining concrete 22 by attaching the moisturizing and curing layer 26 to the outer peripheral portion of the arched frame structure 11 in advance through an adhesive or the like. At the same time, the moisture retention layer 26 can be disposed in a state of being in close contact with the inner peripheral surface 22a of the lining concrete 22. In addition, after the arch-shaped frame structure 11 is installed along the inner peripheral surface 22a of the lining concrete 22, the sheet-like moisture retention layer 26 cut into a predetermined shape is covered with the installed arch-shaped frame structure 11 and covered. It can also arrange | position in the state which covered the inner peripheral surface 22a of the lining concrete 22, and was closely_contact | adhered by inserting between the inner peripheral surfaces 22a of the wrought concrete 22 and arranging in succession vertically and horizontally.

  And according to the moisturizing and curing layer mounting structure 10 of the tunnel lining concrete of the present embodiment having the above-described configuration, it has a simple configuration and is arranged along the inner peripheral surface 22a of the lining concrete 22 by a simple operation. It can be installed with high accuracy and can be smoothly removed from the inner peripheral surface 22a of the lining concrete 22 by a simple operation.

  That is, according to the moisturizing and curing layer mounting structure 10 of the present embodiment, the upper frame structure 11a and the pair of side frame structures 11b are formed using a lightweight FRP pipe member and a lightweight grooved steel. The arch-shaped frame structure 11 can be easily and easily formed, and the outer peripheral portion of the arch-shaped frame structure 11 is moisturized by a simple operation using, for example, a plurality of fixed support members 12 made of a known pipe support. In the state where the curing layer 26 is arranged, it can be easily installed along the inner peripheral surface 22a of the lining concrete 22, and the fixed state is released by contracting the extended fixed support member 12. It can be easily removed.

  Further, the upper frame structure 11a and the pair of side frame structures 11b are curved in advance in a shape along the inner peripheral surface 22a of the lining concrete 22 with high accuracy. Since it is pin-coupled in the inner region so as to be bent, the upper frame structure 11a and the pair of side frame structures 11b are rotated from the bent state to follow the arch-shaped portion of the tunnel 20 By fixing in a circumferentially connected state, it is possible to install the lining concrete 22 along the inner peripheral surface 22a of the lining concrete 22 with high accuracy and ease.

  Furthermore, since the upper frame structure 11a and the pair of side frame structures 11b are pin-coupled so as to be rotatable in the inner region of the arch-shaped frame structure 11, the arch-shaped frame using the fixed support member 12 is used. When the structure 11 is fixed, the upper contact surface portion 16a of the upper joint hardware 16 at the lower end portion of the upper frame structure 11a and the lower contact hardware 17 of the lower joint portion of the lower frame structure 11b. The surface portion 17a can be brought into close contact with the substantially entire region while being in surface contact with each other, whereby the arch-shaped frame structure 11 is stabilized along the inner peripheral surface 22a of the lining concrete 22. It becomes possible to install in the state.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the circumferential frame member and the connecting frame member that constitute the arch-shaped frame structure do not necessarily have to be made of FRP pipe members, such as vinyl chloride pipe members and light-weight steel. Can be formed using various kinds of framework members that are easy and lightweight. In addition, it is not always necessary to pin-connect a plurality of upper coupling pieces and a plurality of the lower coupling pieces at a plurality of joint locations by the same straight bar-like pin member, and a pin using a separate pin member at each joint location. It can also be combined. Further, the upper and lower joint pieces need to be provided so as to protrude from the end of the upper frame part or the side frame part joined to the upper joint metal part or the lower joint metal part to the inside of the arched frame structure. It is not always necessary, and they may be provided directly projecting from the upper and lower joint hardware directly inside the arch-shaped frame structure.

  Further, a positioning engagement hole is provided in one of the upper contact surface portion of the upper joint metal at the lower end portion of the upper frame structure and the lower contact surface portion of the lower joint hardware at the upper end portion of the side frame structure. A positioning convex portion that fits into the positioning engagement hole is provided on the other of the upper contact surface portion and the lower contact surface portion at a position that matches the positioning engagement hole, and positioning is performed. By mounting the positioning convex portion in the engagement hole, the upper contact surface portion and the lower contact surface portion can be aligned and brought into close contact with each other.

DESCRIPTION OF SYMBOLS 10 Moisturizing curing layer attachment structure of tunnel lining concrete 11 Arch-shaped frame structure 11a Upper frame structure 11b Side frame structure 12 Fixed support member 13 Circumferential frame member 13a Upper frame part 13b Side frame part 14 Connection frame member 15 Hinge connecting part 16 Upper joint metal part 16a Upper contact surface part 16b Upper joint piece 16c Positioning engagement hole 16d Pin insertion hole 17 Lower joint metal part 17a Lower contact surface part 17b Lower joint piece 17c Positioning engagement hole 17d Pin insertion Hole 18 Pin member 19 Sleeve-shaped hardware 20 Tunnel 20a Tunnel inner wall surface 20b Tunnel bottom plate 22 Covering concrete 22a Inner peripheral surface 23 of lining concrete Engaging member 25 Supporting table 26 Moisturizing curing layer

Claims (4)

A moisturizing and curing layer mounting structure for placing a moisturizing curing layer that covers the inner wall surface of the arch-shaped part of the tunnel in a wet state in close contact with the inner peripheral surface of the lining concrete. There,
An arch-shaped frame structure, and interposed between the lower end of the arch-shaped frame structure and the bottom base of the tunnel, and the arch-shaped frame structure is placed along the inner peripheral surface of the lining concrete. And a fixed support member that is fixed in a state where
The arch-shaped frame structure includes a plurality of circumferential frame members extending in the circumferential direction of the arch-shaped portion of the tunnel, and a plurality of connection frame members coupling these circumferential frame members in the tunnel extending direction. Formed with
The arch-shaped frame structure includes an upper frame structure disposed on an upper portion of an arch-shaped portion of a tunnel, and a pair of side frame structures disposed on both sides of the upper frame structure. The structure and the side frame structure are provided so as to be able to be bent through a hinge connecting portion, and to be fixed in a state of being continuously provided in the circumferential direction along the arch-shaped portion of the tunnel,
The hinge connection part between the upper frame structure and the side frame structure is an upper joint metal member that extends the lower end part of the upper frame part of the plurality of circumferential frame members in the tunnel extending direction. And integrally joined via a lower joint that extends in the extension direction of the tunnel at the upper end of the side frame portion of the plurality of circumferential frame members, It is configured by pin-connecting the lower joint hardware so as to be rotatable,
The upper joint hardware and the lower joint hardware are arranged in the circumferential direction when the upper frame structure and the side frame structure are continuously provided in the circumferential direction along the arch-shaped portion of the tunnel. Each of the upper and lower abutment surface portions and the abutment surface portion that abut each other and face each other, and the upper and lower joint metal fittings, and / or the upper frame portion and the side portion joined thereto, are provided. Each of the upper and lower coupling pieces includes a plurality of upper coupling pieces and lower coupling pieces that are provided to project from the end of the frame portion to the inside of the arched frame structure. Is pivotally coupled in the inner region of the arched frame structure,
When the arch-shaped frame structure is fixed using the fixed support member, the upper contact surface portion and the lower contact surface portion are in close contact with each other, so that the upper frame structure and the side frame structure are A structure for attaching a moisture-retaining and curing layer of tunnel lining concrete in which the body is continuously provided in the circumferential direction along the arch-shaped portion of the tunnel. In the upper contact surface portion and the lower contact surface portion, positioning engagement holes are formed at positions that match each other, and by fitting these positioning engagement holes and mounting the engagement members, The structure for attaching a moisture-retaining and curing layer for tunnel lining concrete according to claim 1, wherein the upper contact surface portion and the lower contact surface portion are aligned and in close contact with each other. A positioning engagement hole is formed in one of the upper abutment surface portion and the lower abutment surface portion, and in either one of the upper abutment surface portion and the lower abutment surface portion, the positioning is performed. A positioning convex portion that fits into the positioning engagement hole is provided at a position that matches the engagement hole, and the positioning convex portion is attached to the positioning engagement hole so that the upper contact surface portion The structure for mounting a moisture-retaining and curing layer of tunnel lining concrete according to claim 1, wherein the lower abutting surface portion is aligned and intimately abutted. The plurality of upper coupling pieces and the plurality of lower coupling pieces are pin-coupled at a plurality of joint locations by the same straight bar-like pin member extending in parallel with the upper joint metal and the lower joint metal. The structure for attaching a moisture retention and curing layer of tunnel lining concrete according to any one of claims 1 to 3.

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