JP2005054384A - Curing method of lining concrete by lining center - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a curing method of a lining concrete by the lining center capable of making cure at low cost and making high efficiency of work by utilizing the lining center to facilitate the execution of curing work in the lining concrete. <P>SOLUTION: The curing method of the lining concrete constitutes various kinds of curing methods by properly combining the sticking of a synthetic resin sheet 11 constituted by forming uneven gaps on the secondary lining concrete 8 side by letting it out from a sheet spreading device 6 installed in the lining center 1, the feeding of vapor or fog from a steam generator 7 installed in the lining center and the spreading of a windbreak sheet 13 to a shoulder section from the upper surface of a necessary curing section by letting it out from a sheet spreading device 6 installed in the lining center with each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for curing lining concrete using a lining centle, and more particularly, to a method for curing lining concrete using a lining centle, which improves the cost and efficiency of the curing work by utilizing the lining centle.
[0002]
[Prior art]
The inner wall of the tunnel is sprayed with concrete directly on the inner wall after excavation to prevent collapsing and skin falling, and lining with centr foam for all cross sections. Because tunnel tunnels are no longer hot and humid as in the past due to the increase in size, the surface of the lining concrete is directly exposed to low-temperature and dry air after being removed from the formwork, and is also rapidly cooled and dried. Therefore, shrinkage cracks are likely to occur on the surface.
[0003]
Conventional measures to avoid such problems have been to use special concrete with an expansion agent added, keep the concrete surface moist with water, or cure the sheet. There is an economic problem, wetness with water, etc. has cost problems due to roadbed deterioration due to watering curing and watering / drainage treatment facilities, and sheet curing includes construction problems that make it difficult to attach a sheet to the tunnel arch. Therefore, as long as each problem is unsolved, none of the countermeasures are sufficient.
[0004]
And the example of the lining concrete curing apparatus proposed as improving this is comprised by installing the sheet | seat and the ultrasonic humidifier in the specially manufactured mobile mount. The sheet of this curing device is laid on a steel guide pipe made of synthetic resin and fixed to the movable platform in a form along the lining concrete, thereby lining the concrete and the sheet. A space is formed between the two.
[0005]
The above-mentioned space is closed at both ends with the wife material to be installed, and the ultrasonic humidifier that is installed on the movable base and boiles water by ultrasonic vibration to generate water vapor is a space. While the water vapor is moved from below to the ceiling side, the separated space is filled. However, since the water vapor is formed into water droplets while being cooled, scattering of falling water is prevented. (For example, see Patent Document 1)
[0006]
In the proposed curing apparatus, the lining concrete can be steam-cured in a wet state by passing this state for a predetermined time. However, the curing device is specially made by pasting sheets on a mobile pedestal to cure the lining concrete and installing multiple ultrasonic humidifiers. I need it.
[0007]
Furthermore, since the proposed curing device is separated as a space having a considerable gap between the lining concrete and the sheet in terms of work efficiency, the water vapor released from the ultrasonic humidifier is wide. The percentage of water that is expended in the space and allocated to the surface of the lining concrete is kept at a low level, and the amount of water that falls on the sheet is increased rather than ensuring the wet state of the lining concrete. Even if it is prevented, the curing is not sufficiently performed.
[0008]
[Patent Document 1]
JP 2000-73696 A (paragraph numbers “0006” to “0008”, “0010” to “0026”, FIGS. 1 and 2)
[0009]
[Problems to be solved by the invention]
The present invention is proposed in view of the above-mentioned present situation, making use of the lining centle to facilitate the curing work in the lining concrete, thereby reducing the cost of the curing and increasing the efficiency of the work. We provide a method for curing lining concrete with lining centles.
[0010]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a method for curing a lining concrete with a lining centle, and a sheet-stretching device installed on the lining centle is used to feed a synthetic resin sheet formed with cavities and depressions on the lining concrete side. It is affixed to the surface of the lining concrete, making use of the lining centle to facilitate the curing work without interfering with other work, and to ensure shrinkage cracking of the lining concrete surface. The film curing cost, workability and curing efficiency are improved.
[0011]
According to the second aspect of the present invention, there is provided a method for curing a concrete lining with a lining centle, wherein a synthetic resin sheet formed by forming voids by irregularities on the lining concrete side is fed out from a sheet stretching device installed in the lining centle. Pasted on the surface of the lining concrete, and then steam or mist is sent from the steam generator installed in the lining centle into the gap, so that other work can be prevented by using the lining centle. In addition to facilitating the curing work, the shrinkage cracks on the lining concrete surface are surely reduced to improve the cost, workability and curing efficiency of film curing and steam curing or wet curing.
[0012]
The lining concrete curing method using the lining centle according to the invention of claim 3 is that the windshield sheet is fed out from the sheet extending device installed in the lining centle to reach the shoulder from the top edge of the required curing section. The water vapor is sent from the steam generator installed in the lining centre to the required curing section, and the lining of the lining makes it easy to perform the curing work without interfering with other work. At the same time, shrinkage cracks on the surface of the lining concrete are surely reduced to improve the steam humidification curing cost, workability and curing efficiency.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The method of curing lining concrete with the lining centle according to the present invention is a method of extending a surface of the lining concrete by feeding out a synthetic resin sheet formed with irregularities on the lining concrete side from a sheet spreading device installed on the lining centle. From the steam generator installed in the lining centle, feeding steam or mist, and from the sheet spreading device installed in the lining centle, pulling out the windshield sheet from the top edge of the curing section to the shoulder Appropriate combination of extending to the end constitutes a curing method according to various embodiments, facilitating optimal curing for lining concrete.
[0014]
Hereinafter, each embodiment related to the method for curing lining concrete according to the present invention will be described in detail with reference to the drawings. The method for curing lining concrete in each embodiment covers the curing of secondary lining concrete. This is an example of using engineering centles, and the curing work is carried out efficiently.
[0015]
As shown in the side view of FIG. 1, the secondary lining centle 1 is a centruform having a cross-sectional shape of a tunnel that is divided into a plurality of pieces in the circumferential direction of the tunnel through a telescopic jack or the like on a movable portal frame 2. The formwork is said to be attached, and the length of the formwork is about 10m. In the case of a slide centle, pedestals 3 and 3 are provided before and after the upper part of the movable portal frame 2. It has been.
[0016]
In concrete placement by secondary lining centle 1, the construction cycle is generally two days of centle movement, centle fixation, concrete placement and curing, and it takes at least one week after concrete placement. Since it is necessary to perform good curing, the length of the sheet to be covered for curing is about 30 m for three spans.
[0017]
However, the secondary lining centle 1 according to the present embodiment has the work floor 5 attached to the gantry 3 on the rear end side 4 in the traveling direction, and is a normal facility necessary for the lining centile whose display is omitted. In addition, a sheet expansion device 6 and a steam generator 7 are equipped for curing work.
[0018]
FIG. 2 is an embodiment of film curing relating to a method for curing lining concrete according to the present invention, and shows a relationship with a lining centle in a perspective view in which a tunnel portion is partially sectioned.
The secondary lining centle 1 sprays concrete directly on the inner wall surface after tunnel excavation to prevent collapsing and skin peeling, and constructs secondary lining concrete 8 using centruform. It is an example of a slide centle that moves forward to the next work position after performing work for each span.
[0019]
In this embodiment, a vinyl sheet for packing (registered trademark “Puchipuchi”, manufactured by Kawakami Sangyo Co., Ltd.) 11 composed of a synthetic resin sheet in which a gap 10 is formed by unevenness 9 is illustrated in a partially enlarged view. In this way, the sheet extending device 6 is extended so that a gap 10 is formed on the inner surface side of the lining concrete 8 by the unevenness 9, and the vinyl sheet 11 is laid on the lining concrete 8 while being pressed, Since it is attached by, etc., it is easily pasted without hindering other work.
[0020]
Therefore, in the present embodiment, the surface of the secondary lining concrete 8 is configured to be completely insulated and dry-prevented by vigorous curing, and the shrinkage cracks generated on the surface of the lining concrete 8 can be reliably ensured. It is decreasing.
[0021]
The method for curing lining concrete according to the present invention is not limited to the curing of secondary lining concrete in the above embodiment, but can also be applied to curing other lining concrete. The sheet 11 covers three spans of the work section, but the rear vinyl sheet that has become unnecessary by moving to the next work section can be easily cut by attaching a perforation or the like. It is removed while cutting it properly with a work vehicle.
[0022]
FIG. 3 is an embodiment of film curing and steam curing related to the method of curing lining concrete according to the present invention, and shows a relationship with the lining centle in a perspective view in which the tunnel portion is partially sectioned.
[0023]
Also in the present embodiment, the vinyl sheet 11 for packing is fed out from the sheet expansion device 6 so that the voids 10 due to the unevenness 9 are formed on the inner surface side of the secondary lining concrete 8. The point that the vinyl sheet 11 is laid on the next lining concrete 8 while being pressed, and is attached and attached with a pin or the like is the same as in the above embodiment.
[0024]
However, in the present embodiment, the steam generation device 7 is provided on the work floor 5 of the gantry 3 in addition to the sheet expansion device 6, and after the vinyl sheet 11 is pasted on the secondary lining concrete 8, the vinyl A supply hose 12 from the steam generator 7 is inserted into a gap 10 formed by the unevenness 9 formed in the sheet 11.
[0025]
Between the inner surface of the secondary lining concrete 8 and the vinyl sheet 11, water vapor is injected from the steam generator 7 through the supply hose 12 or mist is sprayed, and the surface of the secondary lining concrete 8 has a temperature of 40 ° C. It is placed in a 100% humidity environment.
[0026]
Therefore, in the present embodiment, the surface of the secondary lining concrete 8 is configured to be completely warm and moist by vigorous curing, and the shrinkage cracks generated on the surface of the secondary lining concrete 8 can be reliably ensured. Reduced to
[0027]
FIG. 4 is an embodiment of steam humidification curing related to the lining concrete curing method of the present invention, and shows a relationship with the lining centle in a perspective view in which the tunnel portion is partially sectioned.
In the present embodiment, a windshield vinyl sheet 13 is fed out from a sheet stretcher 6 installed at the rear end of the secondary lining centle 1, and is directed outward from the tunnel top on the tunnel wall surface on both sides of the tunnel. The windshield vinyl sheet 13 is easily extended to the vicinity of the shoulder where the line is about 45 ° with respect to the vertical axis without hindering other operations.
[0028]
Thus, the windbreak vinyl sheet 13 is installed every three spans in which the secondary lining centle 1 moves, and a curing section 14 is provided between the rear end of the secondary lining centle 1 and the windshield vinyl 13. It is configured as.
[0029]
Therefore, an automatic swinging spray nozzle 15 connected to the steam generator 7 is faced on the side of the curing section 14 of the windbreak vinyl sheet 13, and water vapor from the steam generator 7 is injected into the curing section 14. The surface of the secondary lining concrete 8 is placed in an environment with a temperature of 40 ° C. and a humidity of 100% by spraying or mist.
[0030]
Therefore, in the present embodiment, the surface of the secondary lining concrete 8 is configured to be completely wet by active curing, and shrinkage cracks generated on the surface of the secondary lining concrete 8 are reliably reduced. ing.
[0031]
As described above, the lining concrete curing method using the lining centle according to the present invention is configured as described in detail in each of the above embodiments. While making the curing work easy without any hindrance and making it completely warm and moist by aggressive curing, the cost and work of various curings are reliably reduced while reducing shrinkage cracks on the lining concrete surface. Improves sex and curing efficiency.
[0032]
As mentioned above, although this invention was demonstrated in detail based on embodiment, the curing method of the lining concrete by the lining centle by this invention is not limited to these embodiment at all, The vinyl sheet for packing Of course, various modifications can be made to the specific shape, material, and the like of the sheet stretcher and the steam generator without departing from the spirit of the invention.
[0033]
【The invention's effect】
The method of curing lining concrete with the lining centle according to claim 1 is characterized in that a synthetic resin sheet formed by forming a void by unevenness on the lining concrete side is fed out from a sheet spreading device installed at the lining centle, Since it is affixed to the surface of concrete, the use of lining centles facilitates the work of curing without interfering with other work, and complete warming and moist conditions through aggressive curing. By doing so, it is possible to improve the cost, workability and curing efficiency of film curing while reliably reducing shrinkage cracks on the lining concrete surface.
[0034]
The method of curing lining concrete with the lining centle according to claim 2 is a method in which a synthetic resin sheet formed by forming a void by unevenness on the lining concrete side is fed out from a sheet spreading device installed in the lining centle. Since the steam or mist is sent from the steam generator installed on the lining centre to the gap, and then cured without any hindrance to other work. By making the work easier and by keeping it completely warm and moist by aggressive curing, the shrinkage cracking of the lining concrete surface is surely reduced, the cost and work of film curing and steam curing or wet curing The effect which can improve the property and curing efficiency is demonstrated.
[0035]
The lining concrete curing method using the lining centle according to the invention of claim 3 is that the windshield sheet is fed out from the sheet extending device installed in the lining centle to reach the shoulder from the top edge of the required curing section. Since the steam is sent from the steam generator installed in the lining centre to the curing category after the expansion, the lining of the centle makes it easy to perform the curing work without interfering with other work. At the same time, it is possible to improve the cost, workability and curing efficiency of steam humidification curing by reliably reducing shrinkage cracks on the lining concrete surface by making it completely warm and moist by aggressive curing. ing.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a lining concrete in the curing method for lining concrete according to the present invention. FIG. 2 is an embodiment diagram of film curing related to a curing method for lining concrete according to the present invention. Embodiment of film curing and steam curing according to the curing method of lining concrete according to the present invention [FIG. 4] Embodiment of steam humidification curing related to the curing method of lining concrete according to the present invention [Explanation of symbols]
1 lining centle, 2 mobile portal frame, 3 frame,
4 rear end side in traveling direction, 5 work floor, 6 sheet spreading device,
7 Steam generator, 8 Secondary lining concrete, 9 Concavity and convexity,
10 gap, 11 vinyl sheet, 12 supply hose,
13 Windshield vinyl sheet, 14 Curing category,
15 automatic swinging spray nozzle,

Claims (3)

A method for curing lining concrete with a lining centle, in which a synthetic resin sheet formed by forming a void by unevenness is provided on the lining concrete side from a sheet spreading device installed at the lining centle and pasted on the surface of the lining concrete. A synthetic resin sheet formed by forming an uneven space on the lining concrete side from the sheet spreading device installed in the lining centle, pasted on the surface of the lining concrete, and steam installed in the lining centle Curing method for lining concrete with lining centle that feeds water vapor or mist from the generator. From the sheet expansion device installed in the lining centle, the windshield sheet is fed out and extended from the top to the shoulder of the required curing section, and steam is sent from the steam generator installed in the lining centle to the required curing section. Curing method of lining concrete by engineering center.

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