JP3977849B2 - Lining concrete curing method - Google Patents

Description

  The present invention relates to a lining concrete curing structure suitable for initial curing of, for example, an arched secondary lining concrete that has already been placed in a mountain tunnel.

  An example of this type of lining concrete curing structure is shown in FIG. As shown in FIG. 5, the lining concrete curing structure includes arcuate balloons 2 and 2 on both sides that divide a predetermined place in the arched secondary lining concrete 1 in a mountain tunnel. The sealing sheet 3 that seals between the balloons 2 and 2 on both sides, and the space formed between the inner wall surface 1a of the secondary lining concrete 1 and the balloons 2 and 2 and the sealing sheet 3 on both sides are supplied with air. And a blower pipe 4 for blowing air.

Then, by creating an air layer between the inner wall surface 1a of the secondary lining concrete 1 and the balloons 2, 2 and the sealing sheet 3 on both sides, the inside is kept warm, and the secondary lining concrete 1 is initially cured. It is like that.
JP 2001-123794 A JP 11-62489 A

  However, in the conventional lining concrete curing structure, in order to hold the sealing sheet 3 in an arch shape, in addition to the balloons 2 and 2 on both sides made of arch-shaped balloons or the like, a frame made of steel or the like (not shown) is provided. It became indispensable, and in addition to that, the equipment became large, and the weight of the sealing sheet 3 also increased, making the overall structure complicated and increasing the cost.

  Therefore, the present invention has been made to solve the above-described problems, and provides a lining concrete curing structure capable of curing an arched lining concrete with a simple structure reliably and at low cost. Objective.

The invention of claim 1 has been so as to cure the arcuate secondary lining concrete the already hitting set covers the inner peripheral surface of the arcuate secondary lining concrete already hitting set by curing material lining in concrete curing process, the inner peripheral surface of the arcuate secondary lining concrete by the already hitting set, the surface of the shape corresponding to the curvature of the inner peripheral surface of the arcuate secondary lining concrete the already hitting set not covered by a plurality of curing material having, in turn, characterized in that to complete the lining concrete curing structure to hold the rear surface of the plurality of curing material in arcuate holding member.

The invention of claim 2 is the lining concrete curing method according to claim 1, wherein each of the plurality of curing materials is formed into a substantially rectangular plate shape, and each of the curing materials of the substantially rectangular plate shape is used. surroundings by forming a locking projection and locking recess respectively, and wherein the causing locking the curing material each other through these locking projections and locking recesses mutually adjacent.

A third aspect of the present invention, which a lining concrete curing process of claim 1, wherein, with an engaging recess for engaging the arcuate holding member at the center of each back surface of the plurality of curing material to form respectively It is characterized by using .

A fourth aspect of the present invention, a lining concrete curing method according to claim 1, characterized in that Ru using styrofoam material as the plurality of curing material.

The invention of claim 5 is the lining concrete curing method according to claim 1, characterized in that Ru using an air tube as said arcuate holding member.

As described above, according to the invention of claim 1, the inner peripheral surface of the arcuate secondary lining concrete already hitting set, the inner peripheral surface of the arcuate secondary lining concrete the already hitting set not covered by a plurality of curing material having a surface shape corresponding to the curvature of, then, by completing the lining concrete curing structure to hold the rear surface of the plurality of curing material in arcuate holding member The arched secondary lining concrete that has already been cast can be cured with a simple structure reliably and at low cost. Thereby, the moisturizing effect, heat insulation, and heat retaining effect of the secondary lining concrete surface after placement can be enhanced, and a high-quality secondary lining concrete without cracks can be constructed.

According to the invention of claim 2, a plurality of curing materials formed in a substantially rectangular plate shape are used , and a locking projection and a locking recess are formed around each of the curing materials in a substantially rectangular plate shape. to, by causing locking the curing material each other are located adjacent to each other through these locking projections and locking recesses, it is possible to shield the gap between the connecting portions of the curing material between the mutually adjacent simply and reliably, Outside air can be reliably and effectively blocked.

According to invention of Claim 3, by using what formed the engagement recessed part which each engages an arch-shaped holding material in the center of each back surface of several curing material, the center of each back surface of several curing material It is possible to securely engage the arch-shaped holding material with the engaging recesses of the arch, and to adhere the surfaces of the plurality of curing materials to the inner peripheral surface of the arch-shaped secondary lining concrete by placing in advance, or minutely It can be made to contact reliably through the air layer.

According to the invention of claim 4, by Ru with styrofoam material as a plurality of curing material, the surface of the foam material into a shape corresponding to the curvature of the inner peripheral surface of the arcuate secondary lining concrete already hitting set Since the polystyrene foam material is lightweight, the polystyrene foam material can be applied to the entire circumference in the circumferential direction along the inner circumferential surface of the arched secondary lining concrete. Easy and reliable installation.

According to the invention of claim 5, by Ru with an air tube as arcuate holding member, a plurality of the inner peripheral surface of the arcuate secondary lining concrete already hitting set at this arcuate air tube The curing material can be pressed evenly.

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

  FIG. 1 is a sectional view showing a lining concrete curing structure according to an embodiment of the present invention, FIG. 2 is a perspective view showing a state before a curing material used in the curing structure is built, and FIG. FIG. 4 (a) to FIG. 4 (c) are cross-sectional views showing a procedure until the same curing structure is formed.

As shown in FIGS. 1 and 4, the lining concrete curing structure 10 is, for example, an inner wall surface (inner peripheral surface) of an arch-shaped secondary lining concrete (lining concrete) 12 that has already been placed in a mountain tunnel 11. ) 12a a plurality of polystyrene foam material (covered by curing material) 13 is intended to cure the arched secondary lining concrete 12. That is, the inner wall surface 12a of the arched secondary lining concrete 12 that has already been placed has a plurality of surfaces having a surface 13a having a shape corresponding to the curvature of the inner wall surface 12a of the arched secondary lining concrete 12. It covered with polystyrene foam material 13, and each back surface 13b of the plurality of polystyrene foam material 13 is designed to be held by the arcuate air tube (holding member) 14 made of rubber.

Figure 2, as shown in FIG. 3, the polystyrene foam material 13 Yes respectively formed in a substantially rectangular plate shape, the engagement recess 13c in the center of the rear surface 13b for engaging the arcuate air tube 14 It is formed. Also, with each in the upper and left side of the polystyrene foam material 13 is formed with engaging convexed latch portion 13d of the connecting portion, the engagement of the right portion and the bottom connecting part of the polystyrene foam material 13 A recess 13e is formed. These engaging convexed latch unit 13d and the polystyrene foam material 13, 13 between which are located adjacent to each other via the locking recess 13e is adapted to be engaged. The width (S), for example 200cm of polystyrene foam material 13, the height (H), for example 70cm, thickness (T) Although are formed respectively, for example 10 cm, the height (H) are different sizes Are prepared in advance.

  Next, a procedure until the lining concrete curing structure 10 having the above-described configuration is made will be described with reference to FIGS. 4 (a) to 4 (c).

First, as shown in FIG. 4A, both ends of the air tube 14 are fixed on both sides of the ground in the mountain tunnel 11, and air is injected into the air tube 14 to be inflated. Then, the air tube 14 is erected so as to be along the inner wall surface 12a of the arch-shaped secondary lining concrete 12 in the already-placed mountain tunnel 11. In this case, without completely put air into the air tube 14, made space Tatekomu a polystyrene foam material 13 between the inner wall surface 12a and the air tube 14 of arched secondary lining concrete 12 Keep it.

Next, as shown in FIG. 4 (b), arched secondary lining arched secondary lining by inserting a polystyrene foam material 13 between the inner wall surface 12a and the air tube 14 of the concrete 12 along the inner wall surface 12a of the concrete 12 go built up a polystyrene foam material 13 in the circumferential direction. In this case, locking the polystyrene foam material 13 between which are located adjacent to each other via the locking projection 13d and the engagement recess 13e formed on the periphery of a substantially rectangular plate shape of each polystyrene foam material 13. Moreover, engaging the arcuate air tube 14 in the center of the engagement recess 13c of the back surface 13b of the polystyrene foam material 13.

Then, as shown in FIG. 4 (c), after that built up a polystyrene foam material 13 over the entire circumference a circumferential direction along the inner wall surface 12a of the arcuate secondary lining concrete 12, air tube 14 completely put air within, the air presses equally plurality of polystyrene foam material 13 on the inner wall surface 12a of the arcuate secondary lining concrete 12 with arcuate air tube 14 which is sufficiently injected Thereby, the lining concrete curing structure 10 shown in FIG.1 and FIG.4 (c) is completed.

In the lining concrete curing structure 10, as shown in FIG. 1, is held polystyrene foam material 13 adheres to the inner wall surface 12a of the arcuate secondary lining concrete 12, or has an air layer of the minute Thus, moisture deviating from the inner wall surface 12a of the arched secondary lining concrete 12 can be contained. Thereby, the humidity in the vicinity of the inner wall surface 12a of the arch-shaped secondary lining concrete 12 is high and is kept in a moist state, and the moisturizing effect is enhanced.

In addition, by polystyrene foam material 13 is held in close contact with the inner wall surface 12a of the arcuate secondary lining concrete 12, or has an air layer of the minute, of the arcuate secondary lining concrete 12 Curing heat radiated from the wall surface 12a can be sealed. Thereby, the temperature difference between the inside and outside of the arch-shaped secondary lining concrete 12 can be reduced, and the heat insulating and heat retaining effects can be enhanced.

According to the lining concrete curing structure 10 of the above-described embodiment, the inner wall surface 12a of the arch-shaped secondary lining concrete 12 that has already been placed in the mountain tunnel 11 is formed inside the arch-shaped secondary lining concrete 12. It is covered by a plurality of polystyrene foam material 13 having a surface 13a having a shape corresponding to the curvature of the wall surface 12a, and each back surface 13b of the plurality of polystyrene foam material 13 to be retained in arcuate air tube 14 Thus, the arched secondary lining concrete 12 can be cured with a simple structure reliably and at low cost. Thereby, the moisturizing effect, heat insulation, and heat retaining effect of the inner wall surface 12a of the secondary lining concrete 12 after placement can be enhanced, and a high-quality secondary lining concrete 12 without cracks can be constructed. .

Also, a plurality of polystyrene foam material 13 respectively formed in a substantially rectangular plate shape, and form respectively the locking projections 13d and the engaging recess 13e around the substantially rectangular plate shape of each polystyrene foam material 13, by these engaging convexed latch portions so as to 13d and lock the styrofoam material 13 between adjacent to each via a locking recess 13e, simple and reliable clearance of the connecting portion of the polystyrene foam material 13 between adjacent phase It is possible to shield the outside air reliably and effectively.

Moreover, the engagement recess 13c for engaging the arcuate air tube 14 in the center of each back surface 13b of the plurality of polystyrene foam material 13 were respectively formed, the center of each back surface 13b of the plurality of polystyrene foam material 13 it is possible arched air tube 14 that reliably engaged with the engaging recesses 13c of the adhesion of the surfaces 13a of the plurality of polystyrene foam material 13 on the inner wall surface 12a of the arcuate secondary lining concrete 12, Or it can be made to contact reliably via a micro air layer.

Further, by using the polystyrene foam material 13 as a plurality of curing material, and simplifies the surface 13a of the arcuate secondary lining concrete 12 of the inner wall 12a of the curvature the polystyrene foam material 13 into a shape corresponding to the It can be processed reliably. Further, polystyrene foam material 13 for lightweight, can Tatekomu a polystyrene foam material 13 over the entire circumference in the circumferential direction along the inner wall surface 12a easily and reliably arched secondary lining concrete 12 it can. Further, by using the air tube 14 as the arcuate holding member, equally a plurality of polystyrene foam material 13 on the inner wall surface 12a of the arcuate secondary lining concrete 12 at this arcuate air tube 14 Can be pressed.

In addition, according to the said embodiment, although the case where initial curing of the arch-shaped secondary lining concrete was already carried out in the mountain tunnel was demonstrated, the curing object is the secondary lining of the existing casting in the mountain tunnel. The embodiment is not limited to concrete, and may be applied to arched secondary lining concrete, for example, in other already-placed arch culverts. Moreover, although the polystyrene foam material was used as a curing material, you may use another lightweight heat insulating material etc. Furthermore, although an air tube is used as the holding material, a rounded steel angle steel, a glass fiber having a restoring force, a vinyl chloride pipe, or the like may be used. When this vinyl chloride pipe is used, it is advantageous in terms of economy with light weight and low cost.

It is sectional drawing which shows the lining concrete curing structure of one Embodiment of this invention. It is a perspective view which shows the state before installing the curing material used for the said curing structure. It is a perspective view which shows the state which built the said curing material. (A)-(c) is sectional drawing which shows the procedure until the said curing structure is made. It is a perspective view which shows the conventional lining concrete curing structure.

Explanation of symbols

10 Curing concrete lining structure 12 Arched secondary lining concrete (covering concrete)
12a Inner wall surface (inner circumferential surface)
13 shot foam polystyrene material (curing material)
13a Front surface 13b Back surface 13c Engaging recess 13d Engaging projection 13e Engaging recess 14 Arch-shaped air tube (holding material)

Claims (5)

In lining concrete curing method so as to cure the arcuate secondary lining concrete inner peripheral surface of the arcuate secondary lining concrete already hitting set in the existing hitting set covered with curing material,
A plurality of curing of the inner peripheral surface of the arcuate secondary lining concrete already hitting set, having a surface shape corresponding to the curvature of the inner peripheral surface of the arcuate secondary lining concrete the already hitting set not covered with wood, then lining concrete curing method characterized in that to complete the lining concrete curing structure to hold the rear surface of the plurality of curing material in arcuate holding member. The lining concrete curing method according to claim 1,
Using each of the plurality of curing materials formed in a substantially rectangular plate shape, a locking projection and a locking recess are formed around each of the curing materials of the substantially rectangular plate shape, and these locking projections a lining concrete curing method characterized by causing locking the curing material together adjacent to each through a locking recess. The lining concrete curing method according to claim 1,
Lining concrete curing method which comprises using the engagement recess for engaging said arcuate holding member at the center of each back surface of the plurality of curing materials that were formed. The lining concrete curing method according to claim 1,
Lining concrete curing method characterized by Ru with styrofoam material as the plurality of curing material. The lining concrete curing method according to claim 1,
Lining concrete curing method characterized by Ru with an air tube as said arcuate holding member.

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