JP7316103B2 - Concrete curing device and concrete curing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a concrete curing apparatus and a concrete curing method.

Conventionally, when concrete is placed in a tunnel or the like, it is necessary to cure the inner surface of the tunnel, as described in Patent Document 1, for example. In the curing method described in Patent Document 1, a nonwoven fabric as a water retention sheet and a perforated water conduit are arranged on the inner surface of a tunnel, and an air tube is inflated from the inside thereof to press the nonwoven fabric and the perforated conduit against the inner surface of the tunnel. . After that, water is supplied from the perforated conduit and absorbed by the nonwoven fabric to keep the concrete moist.

JP-A-10-102773

By the way, in the tunnel construction method, it is necessary to prepare dedicated equipment corresponding to various tunnel shapes and dimensions. Even in the curing method described in the above-mentioned Patent Document 1, it is necessary to prepare a dedicated nonwoven fabric, a perforated water conduit, and an air tube for each tunnel, and considerable time and cost are required for designing and manufacturing them. do. This problem is not limited to the case of placing concrete in tunnels, but is a problem that can occur when curing is performed on various shapes of concrete placing surfaces.
SUMMARY OF THE INVENTION An object of the present invention is to provide a concrete curing apparatus capable of curing various shapes of concrete-placed surfaces using common equipment.

In order to achieve the above object, the concrete curing apparatus of the present invention provides a curing sheet for curing concrete by covering at least a portion of the concrete surface, and holding the curing sheet at a predetermined position with respect to the concrete surface. a curing sheet support device for holding the curing sheet in place against the concrete surface; a curing balloon length adjusting means whose length is adjustable, the curing balloon length adjusting means comprising rollers and a pressing guide which are provided facing each other and can be closed by sandwiching the ends of the curing balloon, It is characterized in that the length of the curing balloon can be adjusted by adjusting the closing position of the curing balloon by the rollers and the pressing guide .

According to the present invention having such a configuration, the curing balloon length adjusting means is provided for adjusting the length of the curing balloon in the longitudinal direction. It is possible to adjust the range for holding in place. As a result, it becomes possible to perform curing on concrete placement surfaces of various sizes and shapes, and the versatility of the concrete curing apparatus is improved.

In the present invention, preferably, the curing balloon length adjusting means is configured to be able to close the bag-shaped curing balloon at a desired length position.
According to the present invention configured as described above, since the curing balloon length adjusting means is configured to be able to close the bag-shaped curing balloon at a desired length position, it is possible to adjust the closing position of the curing balloon. This makes it possible to easily adjust the length of the curing balloon.

In the present invention, the curing balloon is preferably arcuately inflatable.
According to the present invention configured as described above, since the curing balloon can be inflated in an arch shape, the curing balloon can be formed in the shape of the concrete-casting surface even for an arch-shaped concrete-casting surface such as the inner surface of a tunnel, for example. Since the sheet expands along the surface of the concrete, the curing sheet is arranged along the concrete placing surface, and curing is performed well.

In the present invention, the curing sheet support device preferably has moving means capable of moving in the surface direction of the concrete surface.
According to the present invention configured as described above, since the curing sheet support device has a moving means capable of moving in the surface direction of the concrete surface, the curing sheet is held at a predetermined position with respect to the concrete surface to perform curing. After that, the curing sheet support device can be moved to hold the curing sheet against the next concrete surface. Therefore, it becomes possible to cure a larger area with less equipment, and the curing work becomes more efficient.

The present invention preferably further comprises an expansion assisting device having an inflatable bag-like auxiliary balloon for assisting expansion of the curing balloon into a predetermined shape.
According to the present invention configured as described above, the auxiliary balloon of the inflation assisting device assists the curing balloon to inflate to a predetermined shape, so that the curing balloon is reliably inflated to a predetermined shape and cured. The sheet is securely held in place.

In the present invention, preferably the auxiliary balloon is arcuately inflatable.
According to the present invention configured as described above, since the auxiliary balloon can be inflated in an arch shape, even for an arch-shaped concrete placing surface such as the inner surface of a tunnel, for example, the auxiliary balloon has the shape of the concrete placing surface. Since the balloon expands along the surface of the concrete, the curing balloon can expand along the surface where the concrete is placed, and good curing is performed. Especially when the curing balloon can be inflated in an arch shape, the auxiliary balloon is inflated along the shape of the curing balloon, so that it is possible to more reliably support the curing balloon.

In the present invention, preferably, the auxiliary inflation device includes auxiliary balloon length adjusting means capable of adjusting the longitudinal length of the auxiliary balloon.
According to the present invention constructed as described above, since the auxiliary balloon length adjusting means is included, it is possible to adjust the range of assisting the curing balloon by adjusting the length of the auxiliary balloon. As a result, it is possible to support curing balloons of various sizes and shapes, and as a result, it is possible to perform curing on concrete placement surfaces of various sizes and shapes, so that the versatility of the concrete curing device is increased. improves.

In the present invention, preferably, the auxiliary expansion device has moving means capable of moving in the surface direction of the concrete surface.
According to the present invention configured as described above, since the auxiliary expansion device has a moving means capable of moving in the plane direction of the concrete surface, the expansion auxiliary device is provided after assisting the expansion of the curing balloon into a predetermined shape. can be moved to assist expansion of the curing balloon against the next concrete surface. Therefore, it is possible to efficiently cure a larger area with less equipment.

Further, in order to achieve the above object, the concrete curing method of the present invention is a concrete curing method for curing concrete by covering at least a part of a concrete surface with a curing sheet, which comprises an expandable bag-shaped sheet. A curing balloon length adjustment process in which the length of the curing balloon in the longitudinal direction is adjusted according to the shape of the concrete surface to be cured, and the curing balloon is inflated to hold the curing sheet in place against the concrete surface. In the curing balloon length adjusting step, the length of the curing balloon is adjusted by pinching and closing the end of the curing balloon at a predetermined position with the rollers and the pressing guide. is characterized by

According to the present invention configured as described above, since the longitudinal length of the curing balloon is adjusted by the curing balloon length adjusting step, the range for holding the curing sheet at a predetermined position by the curing balloon can be adjusted. becomes possible. As a result, it becomes possible to perform curing on concrete placement surfaces of various sizes and shapes, and the versatility of the concrete curing apparatus is improved.

In the present invention, the balloon length adjustment step is preferably performed by occluding the curing balloon to the desired length.
According to the present invention configured as described above, the length of the bag-shaped curing balloon can be easily adjusted by closing the bag-shaped curing balloon at a desired length position.

In the present invention, preferably, after the curing of the concrete surface is completed by performing the curing balloon expansion process, the curing balloon is separated from the concrete surface while being inflated, and the curing balloon is moved in the plane direction of the concrete surface, A subsequent curing step is further included in which the curing balloon is brought into proximity with the next concrete surface to be cured to hold the curing sheet in place against the next concrete surface.
According to the present invention configured as described above, after performing the curing balloon expansion process and holding the curing sheet in a predetermined position to cure the concrete surface, the curing balloon is moved to the next concrete surface while being inflated. Since the next curing sheet is held by holding the next curing sheet, it becomes possible to cure a larger area with less equipment, and the curing work becomes more efficient.

In the present invention, preferably, a bag-shaped auxiliary balloon is arranged on the side opposite to the curing sheet with respect to the curing balloon, and the auxiliary balloon is inflated to assist expansion of the curing balloon into a predetermined shape. Further comprising steps.
According to the present invention configured as described above, the auxiliary balloon assists the curing balloon and helps the curing balloon to expand into a predetermined shape. held in place.

The present invention preferably further includes an auxiliary balloon length adjusting step of adjusting the longitudinal length of the auxiliary balloon according to the shape of the curing balloon.
According to the present invention configured in this manner, the length of the auxiliary balloon in the longitudinal direction is adjusted, so it is possible to adjust the range in which the curing balloon is assisted. As a result, it is possible to support curing balloons of various sizes and shapes, and as a result, it is possible to perform curing on concrete placement surfaces of various sizes and shapes, so that the versatility of the concrete curing device is increased. improves.

In the present invention, preferably, after the inflation assistance step, the auxiliary balloon is separated from the curing balloon while inflated, the auxiliary balloon is moved in the surface direction of the concrete surface, and the next curing balloon to be inflated is moved. and a subsequent inflation assisting step for assisting the curing balloon to inflate to a predetermined shape.
According to the present invention configured as described above, since the auxiliary balloon is moved in the surface direction of the concrete surface while being inflated, the auxiliary balloon is moved after assisting the expansion of the curing balloon into a predetermined shape. to assist expansion of the curing balloon against the next concrete surface. Therefore, it is possible to efficiently cure a larger area with less equipment.

1 is a front view showing a curing sheet supporting device of a concrete curing device according to one embodiment of the present invention; FIG. 1 is a side view showing a curing sheet supporting device of a concrete curing device according to one embodiment of the present invention; FIG. FIG. 4 is a cross-sectional view showing a curing balloon length adjusting means of the curing sheet supporting device according to the embodiment of the present invention; 1 is a front view showing an auxiliary expansion device of a concrete curing device according to one embodiment of the present invention; FIG. 1 is a side view showing an auxiliary expansion device of a concrete curing device according to one embodiment of the present invention; FIG. FIG. 4 is a partially enlarged view showing auxiliary balloon length adjusting means of the auxiliary balloon of the expansion assist device according to the embodiment of the present invention; FIG. 4 is a partially enlarged view showing auxiliary balloon length adjusting means according to one embodiment of the present invention; It is a figure which shows the concrete curing method which concerns on one Embodiment of this invention. It is a figure which shows the concrete curing method which concerns on one Embodiment of this invention. It is a figure which shows the concrete curing method which concerns on one Embodiment of this invention. It is a figure which shows the concrete curing method which concerns on one Embodiment of this invention. It is a figure which shows the concrete curing method which concerns on one Embodiment of this invention. It is a figure which shows the concrete curing method based on the modification of this invention.

Preferred embodiments of the present invention will now be described with reference to the accompanying drawings.
FIG. 1 is a front view showing a curing sheet supporting device of a concrete curing device according to one embodiment of the present invention, and FIG. 2 is a side view showing the curing sheet supporting device of a concrete curing device according to one embodiment of the present invention. 3 is a cross-sectional view showing a curing balloon length adjusting means of a curing sheet support device according to an embodiment of the present invention, and FIG. 4 is a concrete curing device according to an embodiment of the present invention. FIG. 5 is a front view showing the auxiliary expansion device, and FIG. 5 is a side view showing the auxiliary expansion device of the concrete curing device according to one embodiment of the present invention.

As shown in FIGS. 1 to 5, the concrete curing apparatus according to one embodiment of the present invention includes a curing sheet 2 (see FIG. 8) for curing concrete by covering at least a portion of the concrete surface; A curing sheet support device (see FIGS. 1 and 2) 6 having a curing balloon 4 for holding the curing sheet 2 at a predetermined position on the concrete surface, and the curing balloon 4 of the curing sheet support device 6 is inflated to a predetermined shape. and an inflation assist device 8 (FIGS. 4 and 5) for assisting in the inflation.
In this embodiment, a concrete curing apparatus for curing concrete placed on the inner surface of the tunnel 100 (see FIG. 8) will be described.

The curing sheet 2 is a sheet-like member having a length capable of covering the entire inner circumference of the arch-shaped inner surface of the tunnel 100 and a length capable of covering a predetermined length of the inner surface of the tunnel 100 .
As shown in FIGS. 1 and 2, the curing sheet support device 6 includes a curing balloon 4, support bases 10 supporting both ends of the curing balloon 4, and a jack base 12 on which the two support bases 10 are placed. have. A curing balloon length adjusting means 14 capable of adjusting the length of the curing balloon 4 in the longitudinal direction is arranged inside one of the supports 10 .

The curing balloon 4 has a plurality of (five in this embodiment) main balloons 16 that can be arranged at equal intervals along the length direction of the tunnel 100, and sub-balloons 18 that connect the main balloons 16 together.
The main balloon 16 is formed in the shape of an arch-like inflatable bag, and one end is fixed to one support base 10 . A valve 20 for injecting air into the main balloon 16 and a pressure sensor connector 22 for detecting the pressure inside the main balloon 16 are provided near this one end. The other end of the main balloon 16 is inserted into the curing balloon length adjusting means 14 . Near the other end, a plurality of marks 24 for adjusting the length of the curing balloon are provided at predetermined intervals.
The main balloon 16 may be formed in the shape of a single bag, but may also be formed in a double shape by stacking two sheets of the same material or stacking two sheets of different materials.

The sub-balloons 18 are bag-like balloons extending along the length of the tunnel 100 to connect the five main balloons 16 to each other. The sub-balloons 18 are arranged two in the vicinity of the apex of the arch shape when the main balloon 16 is inflated into an arch shape and on both sides thereof with a predetermined interval, for a total of three sub-balloons 18 . Each of the three sub-balloons 18 is provided with a valve (not shown) for injecting air therein and a pressure sensor connector (not shown) for detecting the pressure inside the sub-balloon 18. .

The curing balloon length adjusting means 14 provided inside the other support table 10 includes a roller 26 and a pressing guide 28 for sandwiching the other end of the main balloon 16, and a roller 26 for pressing the pressing guide 28. It has a pusher 30 and a cylinder 32 that supports the pusher 30 so that it can advance and retreat in the radial direction of the roller 26 .
The roller 26 is provided so as to be slightly movable along the advancing/retreating direction of the pusher 30 , thereby being provided so as to approach and separate from the pressing guide 28 .
The presser guide 28 is an arc-shaped member provided with its inner surface facing the outer surface of the roller 26 , and the radius of the inner surface is approximately the same as the outer diameter of the roller 26 . Therefore, an arcuate gap 34 is formed between the pressing guide 28 and the roller 26 . The distance of this gap 34 is substantially the same over the entire area of the arc, and the end of the main balloon 16 is inserted into this gap 34 .

The pusher 30 has an arc-shaped inner surface with a radius substantially equal to the outer diameter of the roller 26 on its tip side, and is provided so as to be able to contact the outer surface of the roller 26 . A proximal end of the pusher 30 is fixed to a cylinder 32 .
The cylinder 32 has a closing position where the pusher 30 is pressed against the outer surface of the roller 26 and the main balloon 16 inserted into the gap 34 is sandwiched between the roller 26 and the pressing guide 28 to close the bag-like main balloon 16, and a pusher position. It is movable between an open position to separate the main balloon 16 from the outer surface of the roller 26 and release the pinching of the main balloon 16 .

Next, the inflation assistance device 8 will be described.
As shown in FIGS. 4 and 5, the inflation assist device 8 has an inflatable bag-shaped auxiliary balloon 36 and a carriage 38 that supports the ends of the auxiliary balloon 36 .
A plurality (five in this embodiment) of the auxiliary balloons 36 are provided at equal intervals along the length direction of the tunnel 100. Between the auxiliary balloons 36, connecting sheets for connecting the adjacent auxiliary balloons 36 are provided. 40 are provided. Both ends of the auxiliary balloon 36 are connected to a carriage 38 with the ends opened.
The auxiliary balloon 36 may be formed in the shape of a single bag, but may also be formed in a double layer, for example, by stacking two sheets of the same material or stacking two sheets of different materials.

Auxiliary balloon length adjusting means 42 capable of adjusting the longitudinal length of the auxiliary balloon 36 are provided near both ends of the auxiliary balloon 36 .
6 and 7 are partially enlarged views showing the auxiliary balloon length adjusting means 42 of the auxiliary balloon 36 of the inflation auxiliary device 8 according to one embodiment of the present invention. As shown in FIG. 6, the auxiliary balloon length adjusting means 42 has flaps 44 provided on the outer periphery near both ends of the auxiliary balloon 36 and eyelets 46 provided on the flaps 44 .

A pair of flaps 44 are provided. An upper flap 44A has its upper end fixed to the outer periphery of the auxiliary balloon 36 and extends downward, and a lower flap 44B has its lower end fixed to the outer periphery of the auxiliary balloon 36 and extends upward. In this embodiment, as shown in FIGS. 4 and 5, two pairs of flaps 44 are provided vertically, and the distance between the upper and lower flaps 44 is different between the upper and lower pairs of flaps 44. . Specifically, the distance between the upper and lower flaps 44 of the upper set of flaps 44 is set larger than the distance between the upper and lower flaps 44 of the lower set of flaps 44 .

When adjusting the length of the auxiliary balloon 36, as shown in FIG. 7, a cord 48 is passed between the eyelet 46 of the upper flap 44A and the eyelet 46 of the lower flap 44B, and the upper and lower flaps 44A are adjusted. , 44B, the string 48 is tied while the auxiliary balloon 36 is contracted. Since each end of the auxiliary balloon 36 is provided with a pair of upper and lower flaps 44, by combining these flaps, the auxiliary balloon 36 can be contracted over various lengths. Specifically, when tying the upper and lower flaps 44A and 44B of the upper set of flaps 44, when tying the upper and lower flaps 44A and 44B of the lower set of flaps 44, the upper flap 44A and the lower flap 44A of the upper set of flaps 44 are tied. It is conceivable that the lower flaps of the set of flaps 44 are tied up. In addition, since the length adjusting means 42 are provided at both ends of the auxiliary balloon 36, the case where the length adjustment is performed by one length adjusting means 42 and the case where the length adjustment is performed by both length adjusting means 42 are possible. Differential use also allows the auxiliary balloon 36 to be adjusted to different lengths.

The carriage 38 includes support plates 50 that fix both ends of the auxiliary balloon 36, wheels 52 that movably support the support plate 50, and a blower unit 54 that blows air into the auxiliary balloon 36 via the support plate 50. , has Since the carriage 38 has wheels 52 to movably support the auxiliary balloon 36 with respect to the installation surface of the carriage 38, the carriage 38 functions as the moving means of the present invention.

A concrete curing method using the concrete curing apparatus configured as described above will be described below.
8 to 12 are diagrams showing a concrete curing method according to one embodiment of the present invention. First, according to the shape and dimensions of the inner surface of the tunnel 100 in which concrete is placed on the inner surface, a curing balloon length adjusting process for adjusting the length of the curing balloon 4 and an auxiliary balloon adjusting the length of the auxiliary balloon 36 are performed. Carry out the length adjustment process.

Specifically, in the curing sheet length adjusting step, with the cylinder 32 of the curing balloon length adjusting means 14 positioned at the open position, the end of the main balloon 16 is pulled out from the roller 26 or the main balloon 16 is pulled out. The end of the main balloon 16 is inserted into the gap 34 to adjust the length of the end of the main balloon 16 . When adjusting the length of the main balloon 16, it is preferable to use the mark 24 as a guide. After adjusting the main balloon 16 to the desired length, the cylinder 32 is moved from the open position to the closed position, and the pusher 30 is pressed against the roller 26 so that the roller 26 is pressed against the holding guide 28 and the gap 34 is closed. Block. Thereby, the main balloon 16 is closed at a desired length position, and the length of the main balloon 16 is adjusted.

6 and 7, the auxiliary balloon length adjustment process is performed by selecting the flaps 44 appropriately and connecting the eyelet 46 of one flap 44 and the eyelet 46 of the other flap 44 with a string 48. The length of the secondary balloon 36 is shortened by tying it off.

After the curing balloon length adjusting process and the auxiliary balloon length adjusting process, the curing sheet 2, the curing sheet supporting device 6, and the inflation assisting device 8 are installed on the installation surface 102 inside the tunnel 100. FIG. In this installation process, as shown in FIG. 8, a pair of carriages 38 are arranged at both ends of the tunnel 100 with the auxiliary balloons 36 of the expansion auxiliary device 8 deflated without being inflated. At this time, if the support by the wheels 52 is unstable, for example, outriggers or the like may be provided on the truck 38 to fix the truck 38 at a predetermined position.
The curing sheet supporting device 6 is arranged outside the carriage 38 of the auxiliary balloon 36 so that the curing balloon 4 is positioned above the auxiliary balloon 36 . At this time, the curing balloon 4 is arranged so that the main balloon 16 of the curing balloon 4 is positioned above the auxiliary balloon 36. However, the main balloon 16 of the curing balloon 4 is not limited to this, and the main balloon 16 of the curing balloon 4 is a connecting sheet between the auxiliary balloons 36. 40 may be located above.
Then, the curing sheet 2 is arranged above the curing balloon 4 .

Next, a sub-balloon inflation process is performed to inflate the sub-balloon 18 of the curing balloon 4 . In the sub-balloon inflation process, air is injected into a total of five sub-balloons 18 to inflate the sub-balloons 18 . By this stroke, the sub-balloon 18 is inflated and serves as a weight for the curing balloon 4, so that the curing balloon 4 is stably positioned on the auxiliary balloon 36.

Thereafter, as shown in FIG. 9, an inflation assisting step is performed in which the auxiliary balloon 36 is inflated to support the curing balloon 4 and the curing sheet 2 and assist the curing balloon 4 to expand into a predetermined shape. In this inflation assistance step, air is sent to the auxiliary balloon 36 from the blower unit 54 attached to the carriage 38 to inflate the auxiliary balloon 36 . The pressure sensor monitors the pressure inside the auxiliary balloon 36, and when the pressure reaches a predetermined pressure, the blowing is stopped. The auxiliary balloon 36 supplied with air is inflated in an arch shape to lift the curing balloon 4 and the curing sheet 2 upward in an arch shape. The air blowing by the air blowing unit 54 may be stopped as described above when the predetermined pressure can be maintained, but may be continued so as to maintain the predetermined pressure.

After the inflation assisting step, a curing balloon inflation step is performed to inflate the curing balloon 4 as shown in FIG. In the curing balloon inflation process, air is injected from the valve 20 of each main balloon 16 to inflate the main balloon 16 . A pressure sensor connected to the pressure sensor connection portion 22 monitors the pressure inside the main balloon 16, and when the pressure reaches a predetermined pressure, the supply of air is stopped. Since the main balloon 16 is supported from below by the auxiliary balloon 36, there is no deformation such as buckling in the middle, and the main balloon 16 expands in an arch shape. The curing balloon 4 pushes up the curing sheet 2 and holds the curing sheet 2 in contact with the concrete surface of the inner surface of the tunnel 100 or at a predetermined distance from the concrete surface.
The supply of air to the main balloon 16 may be stopped as described above if the predetermined pressure in the main balloon 16 can be maintained, or may be continued so as to maintain the predetermined pressure.

By maintaining the state in which the curing sheet 2 is held by the curing balloon 4 in this manner, the curing sheet 2 covers the concrete surface of the tunnel 100 to keep the concrete surface moist as shown in FIG. Take care of yourself.

When the curing balloon 4 is inflated into an arch shape of a predetermined shape, the curing balloon 4 can maintain the predetermined shape without the auxiliary balloon 36. Therefore, after performing the curing balloon expansion process, the curing balloon 4 and the While the curing is being performed with the curing sheet 2, the expansion assisting device 8 is moved to the next concrete surface to be cured to perform the next expansion assisting step of assisting the expansion of the curing balloon on the next concrete surface.
FIG. 12 is a diagram showing a concrete curing method according to one embodiment of the present invention. As shown in FIG. 12, the air in the auxiliary balloon 36 is slightly removed to deflate the auxiliary balloon 36 slightly. Then, the auxiliary balloon 36 leaves the curing balloon 4 while being inflated. In this state, the carriage 38 of the auxiliary balloon 36 is moved to move the inflation auxiliary device 8 in the longitudinal direction of the tunnel 100, and the region adjacent to the region where the curing sheet 2 and the curing balloon 4 have already been placed is moved. Position the area to be cured immediately. Then, a new curing balloon 4 and curing sheet 2 are placed on the auxiliary balloon 36, and the auxiliary balloon 36 is inflated again to lift the curing balloon 4 and the curing sheet 2. As shown in FIG. After that, the area to be cured next is covered with the curing sheet 2 by inflating the curing balloon 4 . By repeating this, the curing sheet 2 is arranged over the desired length of the tunnel 100 .

According to this embodiment configured in this manner, the following excellent effects can be obtained.
Since the curing sheet support device 6 has the curing balloon length adjusting means 14 capable of adjusting the length of the curing balloon 4 in the longitudinal direction, the length of the curing balloon 4 can be adjusted. Therefore, the range in which the curing sheet 2 is arranged can be adjusted by the curing balloon 4, and the curing sheet 2 can be supported according to various tunnel 100 shapes and sizes. Therefore, the versatility of the concrete curing apparatus can be improved.

The curing balloon length adjusting means 14 has a roller 26 and a pressing guide 28, and is configured to be able to close the end of the main balloon 16 at a desired length position. The length of the curing balloon 4 can be easily adjusted.

Since the main balloon 16 of the curing balloon 4 can be inflated in an arch shape, the curing balloon 4 can satisfactorily conform to the arch-shaped concrete surface such as the inner surface of the tunnel 100 . As a result, the curing sheet 2 can be arranged so as to well follow the arch-shaped concrete surface, so that the concrete surface can be reliably cured.

Since the expansion assisting device 8 is provided, it is possible to assist the expansion of the curing balloon 4 in an arch shape without buckling during expansion. Therefore, the curing balloon 4 can be reliably inflated in an arch shape, and the curing sheet 2 can be held at a predetermined position against the concrete surface of the tunnel 100 .

Since the auxiliary balloon 36 of the expansion auxiliary device 8 can be inflated in an arch shape, the auxiliary balloon 36 can be well aligned with the arch-shaped concrete surface such as the inner surface of the tunnel 100 and the arch-shaped curing balloon 4. can. Thereby, the curing balloon 4 can be reliably inflated in an arch shape.

Since the auxiliary balloon 36 of the inflation auxiliary device 8 has the auxiliary balloon length adjusting means 42 with the flaps 44 and the eyelets 46, the auxiliary balloon 36 can be inflated according to various shapes and sizes. Therefore, since the curing balloon 4 and the curing sheet 2 can be supported on the concrete surface of tunnels 100 of various sizes and shapes, the versatility of the concrete curing apparatus can be improved.

When the curing sheet 2 is placed on the concrete surface, the length of the curing balloon 4 is adjusted in the curing balloon length adjustment step. can be adjusted accordingly. Therefore, since the common curing sheet support device 6 can be used for tunnels 100 of various shapes and sizes, the versatility of the concrete curing device can be improved.

When the curing balloon 4 is inflated, the auxiliary balloon 36 is inflated to assist the expansion of the curing balloon 4 into an arch shape. can be made As a result, the curing sheet 2 can be reliably held at a predetermined position with respect to the concrete surface, and the concrete can be cured reliably.

When using the auxiliary expansion device 8, an auxiliary balloon length adjusting step is performed to adjust the length of the auxiliary balloon 36 by means of the flaps 44 and the eyelets 46, so that it is possible to accommodate curing balloons 4 of various shapes and sizes. can be used to adjust the inflated size and shape of the auxiliary balloon 36. Therefore, curing can be performed on concrete surfaces of various sizes and shapes.

After the expansion assisting step, the auxiliary balloon 36 is slightly deflated, separated from the curing balloon 4 while inflated, and moved to the next curing area for the next expansion assisting step. Inflation of the curing balloon 4 can be performed sequentially. Therefore, the curing work can be efficiently performed with less equipment.

The present invention is not limited to the above embodiments, and may have the following aspects, for example.
In the above-described embodiment, the curing sheet support device 6 is fixed on the jack base 12, but it is not limited to this, and may have a moving means capable of moving in the surface direction of the concrete surface. . In this case, after the curing of the concrete surface by the curing sheet is completed, the curing balloon 4 is separated from the concrete surface while being inflated, and the curing balloon is moved in the plane direction of the concrete surface to move the next concrete to be cured. A subsequent curing step may be performed in which the curing sheet is brought close to the surface and held in place against the next concrete surface to be cured.

To explain the specific structure, FIG. 13 is a diagram showing a concrete curing method according to a modification of the present invention. As shown in FIG. 13, the two curing sheet supporting devices 6 have a carriage 60 on which the curing balloons 4 are attached, and the carriage 60 is provided with wheels 62 . Thus, the curing sheet support device 6 is movable in the longitudinal direction of the tunnel 100 by the wheels 62 of the carriage 60 . Further, the carriage 60 has an elevating device 64 capable of moving the curing balloon 4 in the vertical direction. Therefore, in this modified example, the carriage 60 functions as moving means for the curing sheet supporting device of the present invention.

In the curing sheet support device 6 having such a structure, the two curing sheets 2 and the curing sheet support device 6 are used to cure the two curing regions. The curing balloon 4 is moved downward by the lifting device 64, and moved away from the concrete surface while the curing balloon 4 is inflated. The curing sheet 2 separates from the concrete surface as the curing balloon 4 descends and is placed on the curing balloon 4 . In this state, the carriage 60 is moved to move the curing sheet 2 and the curing sheet supporting device 6 to the next curing area adjacent to the second curing area through the inside of the second curing balloon 4 . The lifting device 64 lifts the curing balloon 4 to hold the curing sheet 2 at a predetermined position against the concrete surface of the next curing area.

With the curing sheet support device 6 having such a configuration, curing can be performed sequentially using two sets of the curing sheet 2 and the curing sheet support device 6, so curing can be efficiently performed with less equipment. can.

In the above-described embodiments, the auxiliary inflation device has moving means, but it does not necessarily have to have moving means. In addition, even if there is no moving means, the expansion assisting device may be used to assist the curing sheet for curing the next concrete surface. In this case, the auxiliary balloon of the expansion auxiliary device may be contracted once, placed at the position of the next concrete surface to be cured, and then expanded again.
In the above-described embodiment, the auxiliary balloon has auxiliary balloon length adjusting means using flaps and eyelets. The length of the auxiliary balloon may be adjusted. Also, although the auxiliary balloon has the auxiliary balloon length adjusting means, it is not limited to this, and may not have the auxiliary balloon length adjusting means.
Furthermore, the expansion assisting device assists the expansion of the curing balloon into a predetermined shape by adjusting the length of the auxiliary balloon, but the invention is not limited to this. may assist in the expansion of the Specifically, by reducing the spacing between the ends of the auxiliary balloon, such as the spacing between the carriages 38 in the embodiment described above, the height of the arch of the auxiliary balloon is increased to assist in lifting the curing balloon. good too. In this case, by increasing the height of the arch of the auxiliary balloon, it is possible to support the curing balloon in response to concrete surfaces of various shapes and sizes.

Also, in the above-described embodiment, the auxiliary balloon is formed in an arch shape, but it is not limited to this, and any shape can be adopted in consideration of the shape and dimensions of the concrete surface to be cured.
In the above-described embodiment, the expansion assisting device is used to assist the expansion of the curing balloon. It is not always necessary to use an inflation assist device because it may be possible to

In the above-described embodiments, the length of the curing balloon is adjusted by closing the bag-shaped curing balloon at a desired length. can be shortened, or an arbitrary number of cylindrical curing balloon parts can be connected with fasteners or the like.
Moreover, although the curing balloon was formed in an arch shape, it is not limited to this, and an arbitrary shape can be adopted in consideration of the shape, dimensions, etc. of the concrete surface to be cured.

In the above-described embodiment, the curing balloons are connected by the sub-balloons and the auxiliary balloons are connected by the connecting sheet. Moreover, the number of curing balloons and auxiliary balloons is not limited to a set of five in the embodiment, and may be set freely, and may be used by arranging them one by one.

In the above-described embodiments, the apparatus and method for curing the inner concrete surface of a tunnel have been described. It can be used as a surface curing device and method.

2 Curing sheet 4 Curing balloon 6 Curing sheet support device 8 Expansion auxiliary device 14 Curing balloon length adjusting means 36 Auxiliary balloon 38 Carriage (moving means)
42 Auxiliary balloon length adjusting means 60 Cart (moving means)

Claims (16)

a curing sheet for covering at least a portion of the concrete surface to cure the concrete;
a curing sheet support device for holding the curing sheet in a predetermined position with respect to the concrete surface;
The curing sheet support device is
an inflatable bladder-like curing balloon for holding the curing sheet in place against the concrete surface;
a curing balloon length adjusting means capable of adjusting the longitudinal length of the curing balloon,
The curing balloon length adjusting means includes rollers and holding guides which are provided opposite to each other and can close the ends of the curing balloon by sandwiching them, and adjusts the closing position of the curing balloon by the rollers and the holding guides. The length of the curing balloon is configured to be adjustable by
A concrete curing device characterized by: wherein the curing balloon is inflatable in an arch shape;
The concrete curing device according to claim 1 . The curing sheet support device has a moving means capable of moving in the surface direction of the concrete surface,
The concrete curing device according to claim 1 or 2 . Further comprising an expansion assisting device having an inflatable bag-like auxiliary balloon for assisting the curing balloon to expand into a predetermined shape,
The concrete curing device according to any one of claims 1 to 3 . wherein the auxiliary balloon is arcuately inflatable;
The concrete curing device according to claim 4 . The expansion assist device includes an auxiliary balloon length adjusting means capable of adjusting the length of the auxiliary balloon in the arch shape ,
The concrete curing device according to claim 5 . The expansion auxiliary device has a moving means capable of moving in the surface direction of the concrete surface,
The concrete curing device according to claim 4 to claim 6 . A concrete curing method for curing concrete by covering at least part of a concrete surface with a curing sheet,
a curing balloon length adjusting step of adjusting the longitudinal length of an inflatable bag-shaped curing balloon according to the shape of the concrete surface to be cured;
a curing balloon expansion step of inflating the curing balloon to hold the curing sheet in place against the concrete surface ;
In the curing balloon length adjusting step, the length of the curing balloon is adjusted by pinching and closing the ends of the curing balloon at a predetermined position with rollers and a pressing guide.
A concrete curing method characterized by: After the curing of the concrete surface is completed by performing the curing balloon expansion step, the curing balloon is separated from the concrete surface while being inflated, and the curing balloon is moved in the plane direction of the concrete surface to perform the curing. further comprising a subsequent curing step of holding the curing sheet in position against the next concrete surface by bringing the balloon into proximity with the next concrete surface to be cured;
The concrete curing method according to claim 8 . An expansion assisting step of arranging a bag-like auxiliary balloon on the side opposite to the curing sheet with respect to the curing balloon and inflating the auxiliary balloon to assist expansion of the curing balloon into a predetermined shape. ,
The concrete curing method according to claim 8 or 9 . Further comprising an auxiliary balloon length adjusting step of adjusting the longitudinal length of the auxiliary balloon according to the shape of the curing balloon,
The concrete curing method according to claim 10 . After the expansion assistance step, the auxiliary balloon is separated from the curing balloon while inflated, the auxiliary balloon is moved in the surface direction of the concrete surface, and the auxiliary balloon is moved to the next curing balloon to be expanded. and a subsequent expansion assisting step of assisting the expansion of the curing balloon into a predetermined shape by bringing the
The concrete curing method according to claim 10 or 11 . a curing sheet for covering at least a portion of the concrete surface to cure the concrete;
a curing sheet support device having an inflatable bag-like curing balloon for holding the curing sheet in place against the concrete surface;
an expansion assisting device having an inflatable bag-shaped auxiliary balloon for assisting the curing balloon to expand into a predetermined shape;
The auxiliary balloon is arcuately inflatable,
The inflation assist device includes an auxiliary balloon length adjusting means capable of adjusting the longitudinal length of the auxiliary balloon,
A concrete curing device characterized by: The expansion auxiliary device has a moving means capable of moving in the surface direction of the concrete surface,
The concrete curing device according to claim 13 . A concrete curing method for curing concrete by covering at least part of a concrete surface with a curing sheet,
a curing balloon expansion step of inflating an inflatable bag-shaped curing balloon to hold the curing sheet in place against the concrete surface;
an expansion assisting step of arranging a bag-shaped auxiliary balloon on the side opposite to the curing sheet and inflating the auxiliary balloon in an arch shape to assist the expansion of the curing balloon into a predetermined shape;
an auxiliary balloon length adjusting step of adjusting the longitudinal length of the auxiliary balloon according to the shape of the curing balloon;
A concrete curing method characterized by: After the expansion assistance step, the auxiliary balloon is separated from the curing balloon while inflated, the auxiliary balloon is moved in the surface direction of the concrete surface, and the auxiliary balloon is moved to the next curing balloon to be expanded. and a subsequent expansion assisting step of assisting the expansion of the curing balloon into a predetermined shape by bringing the
The concrete curing method according to claim 15 .

Images