JP2010242310A - Device and method for curing concrete continuum - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for curing a concrete continuum, which achieve optimum insulated curing, wet curing and continuous curing. <P>SOLUTION: This curing device 10, which is connected to the rear of a movable concrete placing form apparatus 10, includes a waterproof sheet 4 which is provided in a tensioned state on the outer peripheral part of a skeleton composed of vertical and horizontal materials 2 and 3, a nozzle pipe 5, an airbag 6, etc. The airbag 6 is swollen and brought into close contact with the concrete continuum 1 with no space between; and a space, which is formed of the concrete continuum 1 and the waterproof sheet 4, is formed as an enclosed space 12. The curing device 10 enables the insulated curing which keeps the temperature of the inside of the enclosed space 12 at a value equivalent to a maximum value of hydration of water and cement. Additionally, the curing device 10 enables the wet curing which keeps the humidity of the inside of the enclosed space 12 at 99-100%. Furthermore, the airbag 6, which enables the continuous curing, is made of a material which is not damaged through contact with the concrete continuum 1 and abrasion. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention belongs to the technical field of a curing apparatus and curing method for cylindrical concrete continuum such as tunnel lining concrete, and more specifically, increases initial strength and prevents cracking, peeling, and peeling of the concrete surface. The present invention relates to a curing apparatus and a curing method for a concrete continuum that realizes a concrete continuum excellent in quality, durability, and aesthetics.
Incidentally, the concrete continuum refers to a large box culvert in addition to the tunnel lining concrete.

  Various inventions related to a curing device and a curing method for a cylindrical concrete continuous body (particularly, tunnel lining concrete) are disclosed and put into practice. Among them, in recent years, various inventions aimed at improving the quality of the concrete continuous body by increasing the initial strength and preventing cracking, peeling, and peeling of the concrete surface as much as possible have been disclosed (for example, Patent Literatures 1 to 3).

  By the way, in general, it is most effective to perform heat curing for increasing the initial strength of concrete. Moist curing is the most effective way to prevent cracking, peeling and peeling of the concrete surface. Therefore, it is understood by those skilled in the art that the most ideal concrete can be realized by performing the heat curing and the wet curing at the same time.

  In Patent Document 1, a sheet in which both ends in the tunnel axial direction are closed at intervals along the inner surface of the lining concrete is installed to form a space defined between the lining concrete and the sheet. Then, there is disclosed a curing method in which heat curing is performed and moisture curing is performed by filling the space with water vapor (see the description of claim 1 and the like).

  Patent Document 2 discloses a curing balloon that swells in an arch shape by supplying fluid and whose outer peripheral surface is in close contact with the lining concrete surface, and a gate that supports and mounts the curing balloon on the inner peripheral surface. A curing device is disclosed that is provided with a movable carriage of a shape (see the description of claim 1 etc.).

  In Patent Document 3, a waterproof sheet is stretched so as to cover the surface of the concrete with a required interval on the concrete from which the casting form has been removed, and a space is formed between the waterproof sheet and the concrete. A curing method is disclosed in which wet curing is performed by spraying and filling the space with water adjusted to approximately the same temperature as the surface temperature of concrete that undergoes wet curing and changes in temperature over time due to a hydration reaction. (See the description of claim 1).

JP 2000-73696 A JP 2005-299323 A JP 2008-223372 A

Although the invention which concerns on patent document 1 is a technique which performs a heat retention curing and wet curing at the same time, there exist various problems as demonstrated below.
1) When using a vaporizing humidifier (ultrasonic humidifier) that generates water vapor, the use of clean water is obligatory. However, it is difficult to procure local water, and it is difficult to use locally generated water such as groundwater and river water.
2) In order to maintain the space formed between the lining concrete and the sheet at, for example, a humidity of 90% or more, a large number of humidifiers are required or a large humidifier must be used, which is costly. In addition to being bulky, there is a high risk of hindering the passage space in the tunnel premises.
3) According to the description of claim 1 of Patent Document 1, etc., a sheet in which both ends in the tunnel axis direction are closed is installed to form a space defined between the lining concrete and the sheet. There is no disclosure of a specific configuration that forms an isolated space, such as the connection between the seat and the ground in the tunnel premises, and it is estimated that it is difficult to cure the lining concrete at high humidity.
Actually, the Nikkan Kogyo Kogyo Shimbun dated January 16, 2009, in which the content of the present invention was announced, states that “the inside of the sealed space can be maintained at a high humidity of 90% or more”. However, it is known from experiments conducted by the present applicant that when the humidity is about 90%, the increase in strength is small, the tensile strength that resists the cracks of the concrete itself is small, and cracks are reliably generated (see FIG. 13). Table, column B). According to the experiment results by the present applicant, it is known that the humidity in the sealed space needs to be maintained at 99 to 100% in order to prevent any cracks on the concrete surface (see column C).
4) According to paragraph [0026] of Patent Document 1, it is recognized that “the wife 26 is removed and the above operation is repeated”. In this case, the sealed state that has been formed must be released each time the curing device is moved, and it takes time and effort to form a sealed space again, which is irrational and uneconomical.
5) In recent years, lining concrete is required not only to improve quality but also to improve aesthetics. Specifically, it is to prevent a mottled pattern from appearing when water directly hits the concrete surface, but this point has not been improved at all.

Next, the invention according to Patent Document 2 is mainly intended for heat curing, and does not consider wet curing at all. Therefore, even if the humidity in the sealed space can be maintained at about 85 to 90% at most, higher humidity cannot be expected, and there is a problem that the concrete surface is surely cracked.
Further, according to paragraph [0019] of Patent Document 2, “after a predetermined curing period has elapsed, the operation of the blower is stopped, the air is discharged from the curing balloon 20, and the movable carriage 11 is advanced to the next curing section. . " In this case, as in Patent Document 1, the sealed state that has been formed must be released each time the movable carriage 11 (curing device) is moved, which takes time and effort to form a sealed space again, which is unreasonable and unreasonable. It is an economy.

Although the invention which concerns on patent document 3 is a technique which performs a heat retention curing and a wet curing at the same time, wet curing forms a sealed space between concrete and a waterproof sheet, and the humidity in the sealed space is 99-100. If it is not kept at%, cracks are surely generated on the concrete surface. However, a specific configuration for solving this point is not disclosed.
Certainly, paragraph [0019] of this Patent Document 3 has a description that “forms a substantially hermetically sealed space”, followed by “for example, the humidity is 100%”.
However, in order to maintain the humidity of 100%, the space portion must be a completely sealed space, and the humidity does not reach 100% as long as a substantially sealed space is formed. In addition, there is no disclosure of a specific configuration that forms a substantially sealed space, such as a connection between the seat and the ground in the tunnel.
In order to support this point, Patent Document 3 states in claim 1 and the like that “the concrete whose temperature changes with time due to the hydration reaction is sprayed onto the space portion with water adjusted to substantially the same surface temperature. There is a description of “filling”. According to a full-scale experiment conducted by the present applicant, as shown in FIG. 12 according to the present application, even if a space between the tunnel lining concrete is secured to about 300 to 500 mm and a completely sealed space is formed. After 17 hours (so-called centle removal standard time), the temperature in the sealed space is constantly maintained at a value equivalent to the maximum value of the hydration reaction between water and cement (34-35 ° C in this experiment). I know I can. That is, even if this point is considered, the space part according to Patent Document 3 is nothing but the formation of a sealed space.

The object of the present invention is to form the space formed by the concrete continuum and the waterproof sheet in a completely sealed space to realize an optimum heat curing, and to set the average particle diameter of the spray nozzle, the mounting pitch, and the spray amount. An object of the present invention is to provide a curing apparatus and curing method for a continuous concrete body, which are adjusted as appropriate to maintain the humidity in the sealed space at 99 to 100% and realize optimum wet curing.
The next object of the present invention is to provide a curing device for a continuous concrete body that realizes continuous curing by devising the selection and mounting method of the air bulg material used for forming the sealed space, and the manufacturing method, and It is to provide a curing method.
A further object of the present invention is to adjust the mounting angle of the spray nozzle, the spray angle to an appropriate angle with respect to the surface of the concrete continuum, and spray without direct contact with the surface of the concrete continuum. To provide a curing apparatus and a curing method for a concrete continuum that can prevent a spotted pattern from appearing and realize a concrete continuum having an excellent aesthetic appearance.

As a means for solving the above-mentioned background art, the concrete continuum curing device according to the first aspect of the present invention is a cylinder of tunnel lining concrete or the like formed using a mobile concrete placing formwork device. A concrete continuum curing device,
The curing device has a shape similar to the shape of the inner surface of the concrete continuum from which the casting form is removed, and a plurality of vertical members arranged in parallel in the front-rear direction of the concrete continuum, and the plurality of vertical members. A plurality of fixed cross members, a waterproof sheet stretched around the outer periphery of the skeleton composed of the vertical members and the cross members, a spray pipe provided substantially parallel to the cross members, and a vertical member located at the rear end It consists of an air bulg attached in the circumferential direction of the material, a support member that supports the longitudinal member, and a wheel provided at the lower end of the support member, and is connected to the rear part of the mobile concrete placement formwork device is being done,
The vertical members are arranged side by side with an interval of 300 to 450 mm with the concrete continuum,
The spray pipe is provided with a plurality of spray nozzles protruding from the waterproof sheet and directed to the concrete continuum so as to ensure a distance of 250 to 400 mm between the concrete continuum and the tip of the spray nozzle. That
The waterproof sheet has a front end secured to a rear end of the movable concrete placing form device without a gap, and both left and right end portions are of a length that forms an overlap with the ground. The opening through which is blocked by a sealing member,
The air bulg has a length that allows both left and right ends to form an overlap with the ground, and is attached so as to be in close contact with the concrete continuum without any gap when expanded.
The air bulge is inflated and closely adhered to the concrete continuum so that the space formed by the concrete continuum and the waterproof sheet is formed over the entire length of the curing device, and the movable concrete placing form apparatus and the rear end of the front end A sealed space that is hermetically sealed with an air bulg is formed, and the temperature in the sealed space is configured to be capable of heat curing to maintain a value equivalent to the maximum value of the hydration reaction of water and cement,
The spray nozzle has a performance of spraying a fine mist having an average particle size of 30 to 65 μm, and has an attachment angle and a spray angle so that the fine mist does not hit the surface of the concrete continuum. It is set as the structure in which it is set as the appropriate installation pitch and the amount of spraying to make it fill with fine mist, and the moisture curing which maintains the humidity in the sealed space at 99-100% is possible,
The air bulg is made of a material that is not damaged by contact / abrasion with a concrete continuum even if moved in an expanded state, and is configured to be capable of continuous curing,
Are each characterized.

The invention described in claim 2 is the concrete continuum curing device described in claim 1, wherein a plurality of the spray pipes are provided at intervals of about 3.5 m in the circumferential direction of the longitudinal member, Each of them is fixed to an adjacent horizontal member in an arrangement substantially parallel to the horizontal member,
The spray nozzle is a uniform spray nozzle with a spray angle of 50 degrees, and is installed in the spray pipe via a fixed bifurcated adapter.
A plurality of the bifurcated adapters are provided on the spray pipe at a pitch of about 3 m, and the two spray nozzles attached to the bifurcated adapters are in a position perpendicular to the surface of the concrete continuum. The mounting angles are inclined outward by 80 degrees from each other in the front-rear direction of the continuum, and a fine mist is sprayed at a spray amount of 1 to 2 liters per hour.

  The invention described in claim 3 is the concrete continuum curing device described in claim 1 or 2, wherein the waterproof sheet is a transparent or translucent laminated sheet, and both left and right ends thereof are respectively connected to the ground. It is the dimension which forms the overlap allowance of about 70-100cm, It is characterized by the above-mentioned.

  The invention described in claim 4 is the concrete continuum curing device according to any one of claims 1 to 3, wherein the air bulg has a thickness of 250 denier and an expanded diameter of about 600 mm. The left and right ends are each of a length that forms an overlap margin of about 70 to 100 cm with the ground.

  The invention described in claim 5 is the concrete continuum curing device according to any one of claims 1 to 4, wherein the air bulge is expanded in a state of being attached in a circumferential direction of a longitudinal member located at a rear end. Then, in order to adhere to the surface of the concrete continuum without any gaps, the length per unit is about 10 to 30 cm, and the portion that contacts the surface of the concrete continuum substantially coincides with the corresponding surface. A plurality of air bulg pieces formed with a curvature and formed with a curvature that substantially coincides with the longitudinal material that contacts the longitudinal member are joined together in a series along the circumferential direction of the concrete continuum, and both ends. Is manufactured by being closed.

  The invention described in claim 6 is the concrete continuum curing apparatus according to any one of claims 1 to 5, wherein the air bulg is a waterproof sheet stretched in the circumferential direction of a longitudinal member located at the rear end. The steel sheet and the steel sheet, and the steel sheet and the air bulg are attached to each other with a double-sided adhesive tape. It is characterized by being.

According to a seventh aspect of the present invention, there is provided a method for curing a concrete continuous body, wherein the curing device according to any one of the first to sixth aspects is advanced in accordance with the movement of the movable concrete placing form device, After stopping in the curing section for curing the concrete continuum exposed by removing the formwork frame, the air bulg of the curing device is inflated so as to closely adhere to the concrete continuum, over the entire length of the curing device, A space formed by the continuous concrete body and the waterproof sheet is sealed by a movable concrete placing form device at the front end and an air bulg at the rear end, and the temperature in the sealed space In addition to performing a heat curing that maintains the same value as the maximum value of the hydration reaction of cement, a fine mist having an average particle size of 30 to 65 μm from a plurality of spray nozzles installed in the spray pipe in the sealed space And performing a moist curing for holding the humidity of the enclosed space to the 99 to 100% by spraying to avoid exposure to the surface of the concrete continuum,
After the heat curing and wet curing are performed for 24 to 72 hours in the curing section, the air bulg is continued inflated according to the construction of the concrete continuous body formed by using the movable concrete casting form apparatus. Then, it is advanced in the axial direction of the concrete continuum while performing the heat insulation curing and the wet curing, and includes a step of performing the continuous curing for each curing section.

According to the curing apparatus and curing method for a concrete continuous body according to the present invention, the following effects can be obtained.
1) When the air bulg 6 is inflated and brought into close contact with the concrete continuum 1 without a gap, the space 12 formed by the concrete continuum 1 and the waterproof sheet 4 extends over the entire length of the curing device 10 to move the movable concrete at the front end. An opening through which the spray frame 9 protrudes from both ends of the waterproof sheet 4 due to the overlap effect, which is blocked from the outside air by the form frame portion at the rear end and the air bulg 6 at the rear end. Since the portion is closed by the seal member, the space 12 can be formed into a complete sealed space 12.
Further, since the interval between the concrete continuous body 1 and the waterproof sheet 4 is about 300 to 450 mm (370 mm in this embodiment), the temperature in the sealed space 12 is set to the maximum value of the hydration reaction between water and cement. Can be kept constant (usually within the range of 15 to 40 ° C.) (see FIG. 12 as an example).
Therefore, it is possible to realize the optimum heat curing.
2) By setting the average particle diameter, the mounting angle, the spraying angle, the mounting pitch, and the spray amount of the spray nozzle 9 based on a full-scale experiment, the humidity in the sealed space 12 can be maintained at 99 to 100%. it can.
Therefore, the tunnel lining concrete 1 having excellent quality and durability can be realized without causing cracks after construction. Moreover, since the fine mist sprayed from the spray nozzle 9 does not directly hit the tunnel lining concrete 1, no spot pattern is generated after the construction, so that the tunnel lining concrete 1 excellent in aesthetics can be realized.
3) Since a material with excellent change following ability and durability is selected and the air bulg 6 is devised in the mounting method and the manufacturing method, it is closely attached along the curvature of the tunnel lining concrete 1. Thus, the sealed space 12 can be reliably realized, and the mobile concrete placing form apparatus 1 is kept in a fully inflated state, and is kept in close contact with the tunnel while maintaining the sealed space 12 while moving. There is no risk of damage due to contact or wear with the lining concrete 1.
Therefore, it is possible to achieve a continuous curing while ensuring a sealed space in a state where the air bulg 6 is sufficiently inflated, and maintaining an optimum heat and moisture curing.

It is the side view which showed roughly the curing device of the concrete continuous body (tunnel lining concrete) which concerns on this invention. FIG. 2 is an end view taken along line XX in FIG. 1. It is a YY arrow directional end view of FIG. FIG. 3 is a partially enlarged view of FIG. 2. FIG. 4 is a partially enlarged view of FIG. 3. A is a perspective view showing an aspect in which a spray tube is attached to a cross member, and B is a front view of the same. A is a detailed view showing a spray shape of a spray nozzle attached to a bifurcated adapter, and B is an elevation view showing an attached state of the spray nozzle. It is the perspective view which showed roughly the attachment state of the spray pipe and the spray nozzle. A is a table based on the results of a full-scale experiment, and B to D are supplementary diagrams related to Table A, in specifying specific configurations such as the mounting angle of the spray nozzle, the spray angle, and the like. A is a table based on the results of full-scale experiments showing that the durability and changeability of the expanded air bulg change according to the thickness (denier) of the air bulg made of nylon taffeta. These are supplementary diagrams according to Table A, respectively. It is a table | surface based on the full-scale experiment result which showed that the change followable | trackability of the expanded air bulg changes according to the maximum air volume of an electric blower. It is a graph based on the full-scale experiment result which showed that the surface temperature of the concrete continuous body in sealed space changes with time according to the space | interval of a concrete continuous body (tunnel lining concrete) and a waterproof sheet. It is the table | surface which showed the crack test result of the tunnel lining concrete.

  Next, an embodiment of a concrete continuum curing apparatus and curing method according to the present invention will be described with reference to the drawings.

  FIGS. 1-6 has shown the outline | summary of the curing apparatus 10 of the tunnel lining concrete (cylindrical concrete continuous body) 1 shape | molded using the mobile concrete placement form apparatus (what is called a centle) 11. FIG.

The curing device 10 has a shape similar to the shape of the inner surface of the concrete continuum 1 from which a casting mold is removed, and a plurality of vertical members 2 arranged in parallel in the front-rear direction of the concrete continuum 1, A plurality of cross members 3 fixed to the vertical member 2, a waterproof sheet 4 stretched on the outer periphery of the skeleton composed of the vertical members 2 and the cross members 3, and the parallel members 3. A spray pipe 5, an air bulg 6 attached to the circumferential direction of the longitudinal member 2 located at the rear end, a support member 7 for supporting the longitudinal member 2, and a wheel 8 provided at the lower end of the support member 7. And is connected to a rear portion of the movable concrete placing form apparatus 11. Incidentally, reference numeral 16 in the figure denotes a blower pipe, and reference numeral 21 denotes a rail laid on the ground in the tunnel yard.
That is, the curing device 10 having the above-described configuration is implemented in a configuration that can follow along the rail 21 with the movement of the movable concrete placing form device 11.
The means for running the curing device 10 is not limited to the rail system that travels along the rail 21, but can be implemented in the same manner by a groove steel system that travels on the flange upper surface of the groove steel.

Moreover, as for the said curing apparatus 10, the said vertical member 2 ensures 300-450 mm space | interval with the said continuous concrete body 1, and is arranged in parallel.
In the spray pipe 5, a plurality of spray nozzles 9 protrude from the waterproof sheet 4 and are directed to the concrete continuum 1, and the distance between the concrete continuum 1 and the tip of the spray nozzle 9 is 250 to 250. 400mm is secured and installed.
The waterproof sheet 4 has a front end secured to the rear end of the movable concrete placing form apparatus 11 without a gap, and both left and right end portions are of a length that forms an overlap with the ground, The opening through the spray nozzle 9 is closed with a seal member (not shown).
The air bulg 6 has such a length that left and right end portions thereof form an overlap allowance with the ground, and is attached so as to be in close contact with the continuous concrete body 1 without any gap when expanded.

Therefore, when the curing apparatus 10 expands the air bulg 6 and closely contacts the concrete continuum 1 without a gap, the front end of the space 12 formed by the concrete continuum 1 and the waterproof sheet 4 is formed over the entire length of the curing apparatus 10. A closed space 12 is formed to be sealed by the movable concrete placing form device 11 at the rear part and the air bulg 6 at the rear end, and the temperature in the sealed space 12 is equal to the maximum value of the hydration reaction between water and cement. It is set as the structure in which the heat curing which hold | maintains to a value (usually within the range of 15-40 degreeC) is possible.
The spray nozzle 9 has a performance of spraying fine mist having an average particle diameter of 30 to 65 μm, and is set to an attachment angle and a spray angle so that the fine mist does not hit the surface of the concrete continuous body 1. Furthermore, the mounting pitch and the spray amount are appropriate for filling the sealed space 12 with fine mist, and the wet curing that maintains the humidity in the sealed space 12 at 99 to 100% is possible.
Furthermore, the air bulg 6 is made of a material that can be continuously cured by using a material that is not damaged by contact and wear with the continuous concrete body 1 even if it is moved in an expanded state. 1).

Incidentally, the curing apparatus 10 according to the illustrated example is shown in FIG. 1 on the basis that the tunnel lining concrete 1 is normally constructed with a length of 10.5 m as one span (refer to reference sign S in FIG. 1). As described above, the length is about 3 spans (about 30 m), and the curing is performed while the curing device 10 is advanced by one span for each section of the demolded mobile concrete placement formwork device 11. We are carrying out.
In addition, the full length of the curing apparatus 10 is not limited to the example of illustration, It can implement with the length for 1 to 2 spans, and can also implement with the length of 4 spans or more. In addition to the above 10.5 m, the length of one span may be 6 m, 9 m, and 12 m.

In short, the curing device 10 according to the present invention makes the optimum thermal insulation, that is, the temperature in the sealed space 12 by making the space formed by the continuous concrete body 1 and the waterproof sheet 4 a complete sealed space 12. The first feature is to realize a thermal curing that is maintained at a value equivalent to the maximum value of the hydration reaction between the cement and the cement (usually within a range of 15 to 40 ° C.).
Further, based on a full-scale experiment, by appropriately adjusting the average particle diameter, the mounting angle, the spraying angle, the mounting pitch, and the spray amount of the spray nozzle 9, the optimal wet curing, that is, the humidity in the sealed space 12, The second feature is to realize a wet curing which is maintained at 99 to 100%.
Furthermore, the sealed space 12 is secured in a state where the air bulg is inflated by devising the selection, attachment method, and manufacturing method of the air bulg 6, and the optimum heat and moisture curing is continued. A third feature is to realize continuous curing in which the curing device is advanced while being held.
Hereinafter, specific configurations for realizing the first to third features will be described in order.

(Configuration for achieving optimal heat curing (first feature))
The vertical member 2 according to the present embodiment is formed in an arch shape similar to the inner side surface shape of the concrete continuous body 1 using a hollow round steel pipe (or a square steel pipe) having a diameter of 60 mm and from which a casting form is removed. In addition, a total of 15 vertical members 2 of 5 per span are juxtaposed in the axial direction of the tunnel lining concrete 1 with an interval of about 170 or 350 mm (see FIG. 1).
The vertical members 2 are arranged side by side with a gap G (see FIG. 4) of 300 to 450 mm with respect to the continuous concrete body 1.
The reason for securing the distance of 300 to 450 mm is that, in order to maintain the temperature in the sealed space 12 at a value equivalent to the maximum value of the hydration reaction between water and cement, as shown in FIG. This is because it is considered that the interval needs to be 300 to 500 mm and that it is difficult to secure a traveling space for the tunnel excavating vehicle if the interval is larger than 450 mm.
Incidentally, the gap G between the concrete continuous body 1 and the waterproof sheet 4 according to this embodiment is 400 mm.
The supporting member 7 that supports the longitudinal members 2 is formed by combining a plurality of steel materials by means of welding, bolts, or the like, and has sufficient rigidity to support the skeleton composed of the longitudinal members 2 and the transverse members 3. Is done.

The cross member 3 is provided to constrain the vertical member 2, and a crossing portion with the vertical member 2 is fixed to the vertical member 2 by a joining means such as welding or a bolt.
The cross member 3 according to the present embodiment uses a hollow round steel pipe (or a square steel pipe) having a diameter of 30 mm, and a total of 17 pieces are provided on the outside along the circumferential direction of the vertical member 2 with good balance. Of course, the number is not limited to this, and the number is appropriately increased or decreased on condition that the longitudinal member 2 to be used is restrained in a stable state.
Therefore, the distance H (see FIG. 4) between the concrete continuous body 1 and the waterproof sheet 4 according to the present embodiment is 370 mm assuming that the sheet thickness of the waterproof sheet 4 can be ignored.

The waterproof sheet 4 is made of a material excellent in heat retention, durability, and change following ability as well as using a non-breathable sheet. Incidentally, the waterproof sheet 4 according to the present embodiment is implemented by a laminated sheet in which a resin cloth layer made of a resin cloth such as polyethylene cloth or polypropylene cloth is laminated on a lightweight and extremely durable polypropylene sheet layer. .
With respect to the size of the waterproof sheet 4, the left and right ends thereof are shielded from the outside air in a state where the waterproof sheet 4 is stretched without slack so as to cover all the outer peripheral portions of the skeleton composed of the vertical members 2 and the horizontal members 3. Therefore, it is the dimension which forms the overlap allowance T (refer FIG. 2) of about 70-100 cm with the ground in a tunnel premise. Further, the end edge portion is folded back by about 20 cm so as to surely prevent the spring-up caused by running of the curing device 10 or the like. On the other hand, the front end portion of the waterproof sheet 4 is dimensioned so that it can be fastened with a tape material along the mold portion at the rear end of the movable concrete placing form device 11.
Further, the waterproof sheet 4 according to the present embodiment is devised so that the spraying state of the spray nozzle 9 can be checked one by one by visual observation by an operator by implementing the waterproof sheet 4 with a transparent or translucent laminated sheet. Has been.
Thus, the waterproof sheet 4 is stretched without slack so as to cover the entire outer peripheral portion of the skeleton composed of the vertical members 2 and the horizontal members 3, and the front end portion thereof is a movable concrete placing form apparatus 11. It is fastened with a tape material along the form part at the rear end of the tunnel and cut off from the outside air, and both ends thereof are cut off from the outside air by forming an overlap margin T of about 70 to 100 cm with the ground in the tunnel yard. The

The air bulg 6 is made of nylon taffeta having excellent change following ability and durability.
As shown in FIG. 5, the air bulg 6 has a width curved on the upper surface of the waterproof sheet 4 stretched without slack on the upper surface of the cross member 3 with a curvature matching the longitudinal member 2 located at the rear end. The waterproof sheet 4 and the steel plate material 13, and the steel plate material 13 and the air bulg 6 are attached to each other with a double-sided adhesive tape (not shown). Incidentally, reference numeral 14 in the drawing denotes a restraining member (an angle member or the like) that stabilizes the shape of the air bulg 6 during expansion, and is attached to the cross member 3 by a joining means such as welding or a bolt.
Moreover, the air bulg 6 forms an overlap margin T (see FIG. 3) of about 70 to 100 cm with the ground in the tunnel premises, respectively, in order to cut off from the outside air in the same manner as the waterproof sheet 4. It is said to be long.

The air bulg 6 according to the present embodiment further expands in a state where it is attached in the circumferential direction of the longitudinal member 2 located at the rear end so that the air bulg 6 is closely attached to the surface of the concrete continuous body 1 without a gap. The length of the cylinder is approximately 10 to 30 cm, the portion that contacts the surface of the continuous concrete body 1 is formed with a curvature that substantially matches the surface, and the portion that contacts the longitudinal member 2 is substantially the same as the longitudinal member 2. A plurality of air bulge pieces (not shown) formed with matching curvatures are joined (sewn together) in series along the circumferential direction of the concrete continuous body 1 and both ends are closed. Incidentally, when viewed from the tunnel front direction shown in FIG. 3, each individual air bulg piece has an approximately inverted trapezoidal shape (or Baumkuchen with the part contacting the concrete continuous body 1 as the upper side and the part contacting the vertical member 2 as the lower side. Shape).
In this way, the significance of manufacturing the air bulg 6 by connecting a plurality of air bulg pieces in series is distinguished from the upper half and the lower half with the spring line as a boundary line, and is constructed in a three-center circle or a two-center circle. This is because the air bulg 6 is manufactured by appropriately matching the shape of the air bulg 6 with a special hollow cross-sectional shape unique to the tunnel, so that the air bulg 6 is securely adhered to the surface of the tunnel (continuous concrete 1) without a gap.
In addition, the air bulg 6 which concerns on a present Example is implemented by the diameter at the time of expansion | swelling about 600mm, and full length about 22m. The air bulg 6 preferably has a thickness of 250 denier, and the reason for this selection will be described later.

According to the curing device 10 having the above-described configuration, when the air bulg 6 is expanded and brought into close contact with the concrete continuum 1 without a gap, the space formed by the concrete continuum 1 and the waterproof sheet 4 over the entire length of the curing device 10. 12 is cut off from the outside air by the mold part at the rear end and the air bulg 6 at the rear end of the movable concrete casting form device 11 at the front end, and both ends of the waterproof sheet 4 Since the opening portion that is blocked and from which the spray nozzle 9 protrudes is closed by the seal member, the space 12 can be formed in a completely sealed space 12.
Further, since the interval H between the continuous concrete body 1 and the waterproof sheet 4 is 370 mm, referring to FIG. 12, the temperature in the sealed space 12 is equivalent to the maximum value of the hydration reaction of water and cement ( 34-35 ° C.) can be maintained constantly.
Therefore, it is possible to realize the optimum heat curing.

(Configuration to achieve optimal wet curing (second feature))
As shown in FIG. 2, a plurality of spray tubes 5 according to the present embodiment are arranged in a balanced manner (four locations in the illustrated example) at appropriate positions for providing the spray tubes 5 in the tunnel circumferential direction of the longitudinal member 2. As shown in FIG. 6A, they are provided substantially in parallel along the axis of the cross member 3 located in the vicinity thereof. Each spray pipe 5 is provided with a plurality (three in the illustrated example) of spray nozzles 9 at predetermined intervals.
There are various methods for attaching the spray tube 5 to the cross member 3, but in this embodiment, as shown in FIG. 6B, the spray tube 5 is attached using a lap joint 15 that holds the cross member 3 and the spray tube 5. Yes.

  Specifically, the spray tube 5 is implemented with a tube diameter of about 10 mm and a length per tube of about 7 m, with an equal interval of about 3.5 to 4.0 m in the circumferential direction of the longitudinal member 2. A total of four spray pipes 5 provided in each place in a well-balanced and symmetrical arrangement are arranged in a vertical direction with respect to the paper surface of FIG. (See FIG. 8). In other words, a total of 12 spray tubes 5 according to the present embodiment are used, four for each span.

As shown in FIGS. 6 to 8, the spray nozzle 9 is installed in the spray pipe 5 via a fixed bifurcated adapter 9a.
The bifurcated adapter 9a is provided at three places with a pitch L of about 3 m on the spray pipe 5, and two spray nozzles 9 are provided on each bifurcated adapter 9a. In short, the spray nozzles 9 according to the present embodiment are implemented by using 72 nozzles in total, that is, six spray nozzles 5 each.
As shown in FIGS. 7A and 7B, the two spray nozzles 9 attached to the bifurcated adapter 9a are arranged in a direction perpendicular to the surface of the concrete continuum 1 from the axial direction of the concrete continuum ( Z) is carried out at an attachment angle inclined outward by 80 degrees from each other.
The bifurcated adapter 9a can be a rotary bifurcated adapter. However, since the curing of the tunnel lining concrete is generally performed for a long period of time, the fixed bifurcated adapter 9a that is not likely to break down is preferably used. It is done.

The mounting angle of the spray nozzle 9 and the mounting pitch L of the bifurcated adapter 9a (spray nozzle 9) are determined based on the results of a full-scale experiment conducted by the present applicant, as shown in FIG. 9A.
Incidentally, in FIG. 9A, the nozzle angle (θ) indicates an angle inclined outward from a posture perpendicular to the tunnel lining concrete 1, as shown in FIG. 9B. The spray angle (θ) indicates the spread angle of the fine mist sprayed from the spray nozzle 9 as shown in FIG. 9C. The space | interval (m) has shown the installation space | interval L of the bifurcated adapter 9a (spray nozzle 9) attached to the above-mentioned spray pipe 5 about 7m. Humidity (%) indicates the humidity in the sealed space 12 as a result of conducting this full-scale experiment. The water temperature (° C.) indicates the water temperature of fine mist sprayed from the spray nozzle 9. The spray shape height (h) indicates the highest point of fine mist sprayed from the spray nozzle 9 as shown in FIG. 9D.
Incidentally, the distance H (see FIG. 9B) between the tunnel lining concrete (concrete continuous body) 1 and the spray nozzle 9 (waterproof sheet 4) according to the full-scale experiment is set to 370 mm, which is the same as the height of the present embodiment.

The present applicant conducts full-scale experiments in various combinations. No. in FIG. In (1) to (4), only the main experimental results are extracted from the full-scale experiments performed in various combinations.
In this full-scale experiment, in common, four spray tubes 5 are arranged in a symmetrical arrangement as shown in FIG. The interval between the adjacent spray tubes 5 and 5 is about 3.5 m when viewed from the plane direction. The spray nozzle 9 is sprayed at a spray average particle diameter of 35 to 60 μm, a nozzle diameter of 11 mm, and a spray amount per nozzle of 1 to 2 liters / hour.
The significance of setting the spray average particle diameter of the fine mist within the range of 35 to 60 μm is that the installation pitch of the spray nozzles 9 is narrowed in order to keep the humidity in the sealed space 12 at 99 to 100% when it is less than 35 μm. It is uneconomical that it is necessary to increase the number, and if it exceeds 60 μm, there is a possibility that water (curing water) may drip on the ground of the tunnel premises and become muddy, and it is necessary to prevent this. This is a result of consideration.

As a result of the full-scale experiment, in FIG. 9A, (1) can hold 100% humidity, but the spray shape height (h) reaches 520 mm, and the fine mist directly hits the tunnel lining concrete 1, Since it was clear that a spotted pattern appeared on the surface of the tunnel lining concrete 1 after construction, it was found that it could not be adopted.
Although (2) can also maintain a humidity of 100%, the spray shape height (h) reaches 400 mm, and as in (1) above, the fine mist directly hits the tunnel lining concrete 1, and after the construction It was clear that a spotted pattern appeared on the surface of the tunnel lining concrete 1, and it was found that it could not be adopted.
In (3), the spray shape height (h) is 290 mm, and the fine mist does not directly hit the tunnel lining concrete 1, but the interval between the spray pipes 5 is as long as 4.5 m, and the sealed space 12 It was found that the inside humidity was only 95%, and it was not possible to employ because the risk of causing cracks on the surface of the tunnel lining concrete 1 after construction was very high.
On the other hand, in (4), the spray shape height (h) is 290 mm, and the fine mist does not directly hit the tunnel lining concrete 1. Moreover, it turned out that the space | interval installed in the spray pipe 5 is as narrow as 3.0 m compared with said (3), and the humidity in the said sealed space 12 can be hold | maintained to 100%. Therefore, it turned out that the tunnel lining concrete 1 which is excellent in aesthetics and does not have a possibility of causing a crack without realizing any spotted pattern can be realized.

Therefore, in this example, based on the full-scale experiment, a spray nozzle 9 with a check valve (operating pressure 0.3 MPa) that can spray fine mist having an average particle diameter of 35 to 60 μm and a nozzle diameter of 11 mm is 1 Three spray tubes 5 having a diameter of about 7 m and a diameter of 10 mm are installed at intervals of about 3.0 m, and the amount of spray per nozzle is sprayed at 1 to 2 liters / hour.
In addition, the fan-shaped spray nozzles 9 having a uniform spray angle of 50 degrees are mounted and tilted at an angle of 80 degrees with respect to the tunnel lining concrete 1. In addition, the actual size regarding the form of the spray nozzle 9 used in the present embodiment is as described in FIGS.

The pressure pump 17 (see FIG. 1) for supplying water to the spray nozzle 9 selects an appropriate capacity according to the particle size (performance) of the spray nozzle 9 and the installation quantity. According to the full-scale experiment, the moving speed of the movable concrete placing form apparatus 1 is set to 2.1 m / min using the spray nozzle 9 within the normal tunnel cross-sectional area (60 to 94 m ² ). In this case, in order to realize the spray amount of 1 to 2 liters / hour, a three-phase 200 V · 750 W pressure pump (high pressure pump) 17 is suitable. This high-pressure pump 17 is operated by a generator 18 to supply water from a water storage tank (not shown).
In addition, according to the said full-scale experiment, it turns out that the spray nozzle 9 over 3 spans can be implement | achieved with the spray amount of 1-2 liter / hour with the one high pressure pump 17. FIG. The high-pressure pump 17 according to the present embodiment is implemented with a configuration that can be individually controlled for each span.
In addition, depending on the construction site, when water cannot be used, and when using locally generated water or river water, two special filters are used to prevent clogging of the spray nozzle 9 and enable continuous spraying. It is preferable to carry out using the pressure pump 17 installed.

Here, the structure of the water storage tank used in order to maintain constantly the spraying amount per nozzle 1-2 liter / hour is demonstrated.
For example, when spraying the spray nozzle 9 over 3 spans at a spray rate of 1 liter / hour per nozzle, a water storage tank having a capacity of 600 liters is preferably used. Since there are 72 spray nozzles 9 in total, 72 liters of water (water) is consumed per hour. Then, 576 liters of water are consumed in 8 hours, and the remaining water in the water storage tank is 24 liters at this point. In the present invention, the realization of continuous curing is also a major feature. Therefore, in this embodiment, for example, water is automatically supplied to the water storage tank every time the water in the water storage tank decreases, a flush toilet, etc. The so-called float method used in the above is adopted.

Thus, the curing device 10 having the spray pipe 5 provided with the spray nozzle 9 having the above-described configuration can maintain the humidity in the sealed space 12 at 100% (see FIG. 9A).
Therefore, it is possible to realize the tunnel lining concrete 1 that does not cause cracking after construction (see column C in FIG. 13) and is extremely excellent in quality and durability. Moreover, since the fine mist sprayed from the spray nozzle 9 does not directly hit the tunnel lining concrete 1, it is possible to realize the tunnel lining concrete 1 having no aesthetic appearance and excellent appearance.

(Configuration for realizing optimum continuous curing (third feature))
The air bulg 6 is simply made of nylon taffeta in order to ensure the sealed space 12 constantly and to achieve curing (so-called continuous curing) while maintaining the above-mentioned optimum heat and moisture curing. However, it is necessary to use Airberg 6 which is excellent in continuous curing.
FIG. 10A shows the results of full-scale experiments regarding the thickness (unit: denier) of nylon taffeta. In FIG. 10A, the displacement height (mm) due to air pressure is set to a predetermined value by human power by placing a flat plate 19 having a width of 50 mm on the air bulg sufficiently expanded (H = 600 mm) as shown in FIG. 10B. The height (h) changed when pressed with a force of. As shown in FIG. 10C, the damage determination is performed by placing a spatula 20 having a thickness of 2 mm on the air bulg in a sufficiently expanded state and moving the spatula 20 to the left and right in a state where light pressure is applied manually. The result of performing the step of performing 20 reciprocations is shown.
In addition, as described above, the dimensions of the air bulg 6 used in the full-scale experiment are as follows. The diameter during expansion is 600 mm, the total length is 22 m, and continuous operation is performed with an electric blower adjusted to 5.5 m ³ / min at 60 Hz. ing.

As a result of the full-scale experiment, in FIG. The air bulg 6 having a thickness of 50 deniers in (1) changes from 600 mm to 300 mm in air pressure and is excellent in change following ability. It was found that there was a high risk of breakage due to friction with the concrete 1 and it was not suitable for continuous curing.
In addition, although the air dengue 6 having a thickness of 500 denier in (3) shows no breakage in the damage determination, the change height due to the air pressure remains from 600 mm to 410 mm and the change following ability is inferior. It was found that it was difficult to form the sealed space 12 in close contact and unsuitable.
On the other hand, the air dengue 6 having a thickness of 250 deniers in (2) has a change height due to the air pressure changed from 600 mm to 350 mm, has excellent change following ability, and no damage is recognized in the damage determination. It was found that the sealed space 12 can be formed in close contact with the concrete 1 and that continuous curing can be reliably performed.

Further, the continuous operation of the electric blower closely related to the full-scale experiment of the air bulg 6 was carried out at the maximum air volume of 5.5 m ³ / min based on the full-scale experiment.
FIG. 11 shows an experimental result using an air bulg 6 having a thickness of 250 denier, an expanded diameter of 600 mm, and a total length of 22 m.
As shown in FIG. 10B, the displacement height due to the air pressure in FIG. 11 is obtained by placing a flat plate 19 having a width of 50 mm on the air bulg in a sufficiently expanded state (H = 600 mm) and applying a predetermined force by human power. Refers to the height (h) changed when pressed with. This value agrees with the displacement height of 350 mm by the air pressure of 250 denier according to FIG. This is based on the maximum air volume of (2) being 5.5 m ³ / min.

  Thus, in the curing device 10 having the above-described configuration, the air dengue 6 having a thickness of 250 deniers is excellent in change following ability, so that the sealed space 12 is reliably realized by tightly adhering along the curvature of the tunnel lining concrete 1. it can. Moreover, since it is excellent also in durability, while maintaining the closed space 12 while keeping the state of being in close contact with the movable concrete placing form apparatus 1 while being fully expanded, There is no risk of damage due to contact / wear with the tunnel lining concrete 1. Accordingly, the sealed space 12 can be secured in a state where the air bulg 6 is sufficiently inflated, and continuous curing can be realized while maintaining the optimum heat and moisture curing.

  The curing method performed using the curing apparatus 10 having the above-described configuration is performed according to the following procedure.

The above-mentioned configuration is made after stopping the tunnel lining concrete (continuous concrete) 1 that has been moved forward by the movement of the movable concrete placement form apparatus 1 and removed by exposing the placement formwork and is cured. The air bulg 6 is operated with an electric blower at a maximum air volume of 5.5 m ³ / min.
If it does so, the said air bulg 6 will fully expand | swell so that it may contact | adhere to the said concrete continuum 1 without gap. Further, the space 12 formed by the continuous concrete body 1 and the waterproof sheet 4 over the entire length of the curing device 10 is formed by a mold part at the rear end of the movable concrete placing form apparatus 11 at the front end and an air valve at the rear end. 6 is cut off from the outside air, both ends of the waterproof sheet 4 are cut off from the outside air due to the overlap effect, and the opening from which the spray nozzle 9 protrudes is closed by a sealing member, so that the space 12 is completely sealed. 12 can be formed. Furthermore, since the interval H between the concrete continuous body 1 and the waterproof sheet 4 is 370 mm, referring to FIG. 12, the temperature in the sealed space 12 is set to a value equivalent to the maximum value of the hydration reaction of water and cement. It can be held constantly and can be optimally cured.

  At the same time as the heat curing, the high-pressure pump 17 is operated by the generator 18 to generate fine mist having an average particle diameter of 30 to 65 μm from the plurality of spray nozzles 9 having the above-described configuration installed in the spray pipe 5. It sprays so that it may fill in the said enclosed space 12 so that it may not contact 1 surface. If it does so, the optimal wet curing which maintains the humidity in the said sealed space 12 at 99-100% (a 100% in a present Example) can be performed.

  Thus, the warm and wet curing is performed for 24 to 72 hours in the curing section. If it does so, sufficient heat retention curing and wet curing can be performed. In the meantime, the construction of the concrete continuous body 1 of the next span S can be sufficiently completed by the movable concrete placing form apparatus 1.

Subsequently, the curing carriage 10 is advanced to a curing section for curing the next span S that has been completed in a state where the air bulg 6 is expanded and a fine mist is sprayed from the spray nozzle 9.
The curing cart 10 that has reached the next span S can perform the optimum heat and moisture curing as described above.
On the other hand, since the concrete continuum exposed in order from the rear end of the curing device 10 is sufficiently heat-cured and wet-cured as the curing device 10 moves forward, cracking may occur at all after construction. There is no risk of spotting, and the quality and appearance are excellent.

  By repeating the above steps repeatedly, the tunnel lining concrete that does not cause any cracks over the entire length (see column C in FIG. 13), has no spots, and has high quality and excellent appearance. It can be done.

The embodiments have been described with reference to the drawings. However, the present invention is not limited to the illustrated examples, and includes a range of design changes and application variations that are usually made by those skilled in the art without departing from the technical idea thereof. I will mention that just in case.
For example, in the present embodiment, the explanation is made assuming that the tunnel lining concrete is assumed as the cylindrical concrete continuous body 1, but the present invention is not limited to this, and a formal design change such as forming the cross member 2 into a gate shape. However, the present invention can be similarly applied to the curing of a large box culvert.

1 Tunnel lining concrete (continuous concrete)
2 Vertical material 3 Horizontal material 4 Waterproof sheet 5 Spray tube 6 Air bulg 7 Support member 8 Wheel 9 Spray nozzle 9a Bifurcated adapter 10 Curing device 11 Mobile concrete placing form device (centre)
12 Sealed space 13 Steel plate material 14 Restraint member 15 Overlap joint 16 Blower pipe 17 Pressure pump (high pressure pump)
18 Generator 19 Flat plate 20 Spatula 21 Rail

Claims (7)

A curing device for a continuous tubular concrete such as tunnel lining concrete formed using a mobile concrete placement formwork device,
The curing device has a shape similar to the shape of the inner surface of the concrete continuum from which the casting form is removed, and a plurality of vertical members arranged in parallel in the front-rear direction of the concrete continuum, and the plurality of vertical members. A plurality of fixed cross members, a waterproof sheet stretched around the outer periphery of the skeleton composed of the vertical members and the cross members, a spray pipe provided substantially parallel to the cross members, and a vertical member located at the rear end It consists of an air bulg attached in the circumferential direction of the material, a support member that supports the longitudinal member, and a wheel provided at the lower end of the support member, and is connected to the rear part of the mobile concrete placement formwork device is being done,
The vertical members are arranged side by side with an interval of 300 to 450 mm with the concrete continuum,
The spray pipe is provided with a plurality of spray nozzles protruding from the waterproof sheet and directed to the concrete continuum so as to ensure a distance of 250 to 400 mm between the concrete continuum and the tip of the spray nozzle. That
The waterproof sheet has a front end secured to a rear end of the movable concrete placing form device without a gap, and both left and right end portions are of a length that forms an overlap with the ground. The opening through which is blocked by a sealing member,
The air bulg has a length that allows both left and right ends to form an overlap with the ground, and is attached so as to be in close contact with the concrete continuum without any gap when expanded.
The air bulge is inflated and closely adhered to the concrete continuum so that the space formed by the concrete continuum and the waterproof sheet is formed over the entire length of the curing device, and the movable concrete placing form apparatus and the rear end of the front end A sealed space that is hermetically sealed with an air bulg is formed, and the temperature in the sealed space is configured to be capable of heat curing to maintain a value equivalent to the maximum value of the hydration reaction of water and cement,
The spray nozzle has a performance of spraying a fine mist having an average particle size of 30 to 65 μm, and has an attachment angle and a spray angle so that the fine mist does not hit the surface of the concrete continuum. It is set as the structure in which it is set as the appropriate installation pitch and the amount of spraying to make it fill with fine mist, and the moisture curing which maintains the humidity in the sealed space at 99-100% is possible,
The air bulg is made of a material that is not damaged by contact / abrasion with a concrete continuum even if moved in an expanded state, and is configured to be capable of continuous curing,
A concrete continuum curing device characterized by A plurality of the spray tubes are provided in the circumferential direction of the longitudinal member with an interval of about 3.5 m, and each is fixed to a lateral member located in the vicinity so as to be substantially parallel to the lateral member. thing,
The spray nozzle is a uniform spray nozzle with a spray angle of 50 degrees, and is installed in the spray pipe via a fixed bifurcated adapter.
A plurality of the bifurcated adapters are provided on the spray pipe at a pitch of about 3 m, and the two spray nozzles attached to the bifurcated adapters are in a position perpendicular to the surface of the concrete continuum. It is an installation angle inclined outward by 80 degrees from each other in the front-rear direction of the continuum, and is configured to spray fine mist at a spray amount of 1 to 2 liters per hour, The curing apparatus for a continuous concrete body according to claim 1.   The said waterproof sheet is a transparent or semi-transparent laminated sheet, and both left and right end portions thereof are dimensioned to form an overlap margin of about 70 to 100 cm with the ground, respectively. Curing device for concrete continuum described in 2.   The air bulg is made of nylon taffeta having a thickness of 250 denier, has a diameter of about 600 mm when expanded, and has a length at which both left and right ends form an overlap of about 70 to 100 cm with the ground. The curing device for a continuous concrete body according to any one of claims 1 to 3, wherein   The air bulg is a cylinder having a length of about 10 to 30 cm per body so that when the air bulge is expanded in a state where it is attached in the circumferential direction of the vertical member located at the rear end, it is in close contact with the surface of the continuous concrete body without any gap. A plurality of air bulgs formed with a curvature that substantially matches a surface that contacts the surface of the continuous concrete body and a curvature that substantially matches a vertical material that contacts the longitudinal member. The concrete continuum according to any one of claims 1 to 4, wherein the pieces are produced by joining pieces in series along the circumferential direction of the concrete continuum and closing both ends. Curing equipment.   The air bulg is provided on the upper surface of a waterproof sheet stretched in the circumferential direction of a longitudinal member located at the rear end via a steel plate member having a width of about 40 cm and curved with a curvature matching the longitudinal member. The curing apparatus for a continuous concrete body according to any one of claims 1 to 5, wherein the sheet and the steel plate material, and the steel plate material and the air bulg are bonded to each other with a double-sided adhesive tape. Curing for curing the concrete continuum exposed by removing the casting form by advancing the curing apparatus according to any one of claims 1 to 6 along with the movement of the movable concrete placing form apparatus. After stopping in the section, the air bulge of the curing device is inflated so as to closely adhere to the concrete continuum, and the front end moves through the space formed by the concrete continuum and the waterproof sheet over the entire length of the curing device. Forming a sealed space that is sealed by the concrete casting form apparatus and the air bulg at the rear end, and maintaining the temperature in the sealed space at a value equivalent to the maximum value of the hydration reaction of water and cement. And spraying fine mist having an average particle size of 30 to 65 μ from the plurality of spray nozzles provided in the spray pipe so as not to hit the surface of the concrete continuous body in the sealed space. And performing a moist curing for holding the humidity of the enclosed space to 99-100%,
After the heat curing and wet curing are performed for 24 to 72 hours in the curing section, the air bulg is continued inflated according to the construction of the concrete continuous body formed by using the movable concrete casting form apparatus. Then, the concrete continuation curing method comprises the steps of advancing in the axial direction of the concrete continuum while performing the heat insulation curing and the wet curing, and performing the continuous curing for each curing section.

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