JP2018059327A - Spraying system of water for concrete curing and method of spraying of water for concrete curing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spraying system of water and a method of spraying of water, which can not only automatically spay water at any appropriate time in correspond to a concrete humidity but also spray curing water at an appropriate temperature in accordance with a concrete temperature, to solve problems in a prior art.SOLUTION: A spraying system of water for concrete curing comprises water delivery means, water humidity measuring means, water spray control means, temperature measuring means, temperature adjusting means, and temperature adjustment control means. The water delivery means continuously spray water for a predetermined period when the water spray control means determines to need spraying of water. Moreover, the temperature adjusting means continuously heat or cool water only for a period during spraying of water when the water spray control means determine to need spraying of water and the temperature adjustment control means determine to need water to be heated or cooled (regardless of any concrete surface temperature measured afterward).SELECTED DRAWING: Figure 1

Description

  The present invention relates to wet curing of concrete having a large surface area, such as a bridge slab, for example, and more specifically, water at an appropriate temperature is automatically sprinkled after determining the wet state of the curing range and the concrete temperature. It relates to a watering system and watering method in concrete curing.

  As concrete and water react with each other (hydration reaction), concrete hardens over time and its strength increases. However, due to temperature rise caused by direct sunlight and drying due to wind or the like, moisture tends to evaporate from the concrete immediately after placing. Evaporation of moisture from concrete inhibits the hydration reaction of cement and adversely affects the quality of plastic shrinkage cracks. Therefore, for the purpose of maintaining the wet state of the concrete after placing, “wet curing” is performed in which a concrete curing mat (hereinafter simply referred to as “curing mat”) is laid on the surface and further regular watering is performed. .

  Wet concrete curing must be carried out for a considerable period of time, depending on the daily average temperature. For example, if the average daily temperature is about 10 ° C., normal Portland cement requires a wet curing for one week. In other words, it is necessary to perform regular watering for one week after placing concrete.

  Some concrete structures are small, such as on-site side gutters, and others are relatively large, such as tunnel lining concrete. Of course, the amount of work required for wet curing varies depending on the scale. . In particular, when the concrete surface area is large, such as bridge deck slab concrete, a large curing mat is required accordingly, and the amount of water sprayed increases. Especially for watering, a large amount of watering is performed over a predetermined period (for example, one week). However, since humans have conventionally performed this watering work using a hose or the like, considerable labor and cost are required. It was hanging.

  Therefore, Patent Document 1 proposes a technique for determining the wet state of the concrete surface with an infrared moisture sensor and performing automatic watering according to the determination result when performing wet curing of the tunnel lining concrete.

JP 2011-153497 A

  As described above, concrete hardens by the hydration reaction of cement, and its strength increases. In general, the relationship between the compressive strength of concrete, the curing temperature, and the age can be expressed by the concept of accumulated temperature. If the curing temperature is low, it takes time to develop the predetermined strength, and conversely, the curing temperature is high. Predetermined strength develops early. Although an appropriate range for the curing temperature is not shown, if the curing temperature is extremely low, the hydration reaction of the cement is delayed, and not only the strength expression is delayed, but also there is a risk of initial frost damage. Once concrete has been subjected to initial freezing damage, it will not recover its strength even after proper curing. Therefore, it is desirable that the curing temperature be a certain level or higher. Moreover, when the curing temperature is extremely high, it is known that changes in various properties of the concrete become remarkable, and it is desirable to cure at a temperature below to some extent.

  The “Concrete Standard Specification, Construction (Japan Society of Civil Engineers)” stipulates that concrete to be driven in a situation where the daily average temperature is 4 ° C. or less is to be constructed with particular care as “cold concrete”. For example, the curing of cold concrete is to maintain the concrete temperature at 5 ° C. or higher until a predetermined compressive strength is obtained, and then maintain 0 ° C. or higher for two days thereafter. In addition, concrete that is poured in a situation where the daily average temperature is 25 ° C or higher is specified to be constructed with particular care as “summer concrete”, and due to drying due to a rapid rise in concrete temperature immediately after placing It is supposed to be cured to prevent the cracks that occur.

  Curing while maintaining an appropriate concrete temperature is extremely important for ensuring the quality of the concrete, not limited to cold concrete and hot concrete. Therefore, it is preferable to perform the watering operation on the concrete surface performed by wet curing while controlling the concrete temperature. Specifically, concrete temperature is measured upon watering, and when the temperature is lower than the lower control limit (lower threshold), water is sprayed with relatively high temperature water (hereinafter, water for watering is referred to as “curing water”). However, when the temperature is higher than the management upper limit (upper limit threshold), water is sprayed with relatively low-temperature curing water.

  If the worker performs watering work using a hose, etc., the worker should appropriately measure the concrete temperature and adjust the curing water to an appropriate temperature (temperature increase / cooling) according to the operator's judgment. Can do. However, the automatic watering techniques that have been proposed so far, including Patent Document 1, have only been able to spray the curing water at a constant temperature. If, for example, conventional automatic watering technology is used and water is sprayed with the appropriate temperature of curing water, the operator will need to measure the temperature and adjust the temperature of the curing water. The result is costly.

  An object of the present invention is to solve the problems of the prior art, that is, watering that can automatically sprinkle timely according to the wet state of concrete and spray curing water at a suitable temperature according to the concrete temperature. To provide a system and watering method.

  The present invention was made based on an unprecedented idea of performing automatic watering after judging the necessity of watering and the necessity of adjusting the temperature of curing water based on the wet state and temperature of concrete. It is.

  The watering system for concrete curing according to the present invention is for watering a concrete surface on which a concrete curing mat is laid, and includes water feeding means, moisture measuring means, watering control means, temperature measuring means, temperature adjusting means, temperature adjusting control means. It is equipped with. Among these, the water supply means is a means for sending water into the concrete curing mat and spraying water, and the moisture measuring means is installed between the concrete curing mat and the concrete surface and measures the wet state of the surroundings. The watering control means is means for determining whether watering is necessary based on the wet state obtained by the moisture measuring means. Further, the concrete temperature measuring means is a means for measuring the concrete surface temperature, which is installed between the concrete curing mat and the concrete surface, and the temperature adjusting means warms the water sent by the water feeding means or The temperature adjustment control means is means for determining whether heating or cooling by the temperature adjustment means is necessary based on the concrete surface temperature obtained by the concrete temperature measurement means. The water supply means continuously sprinkles for a predetermined watering time when the watering control means determines that watering is necessary. When the temperature control means determines that the water spray control means requires water spraying and the temperature control control means determines that heating or cooling is required, the water spray time (regardless of the concrete surface temperature measured thereafter) Continue to heat or cool for as long as possible.

  The watering system for concrete curing according to the present invention may be provided with watering time setting means. This watering time setting means is means for setting the watering time based on the wet state obtained by the moisture measuring means. In this case, the water supply means continuously sprinkles for the watering time set by the watering time setting means when the watering control means judges that watering is necessary, and the temperature adjusting means judges that the watering control means needs watering. When the temperature adjustment control means determines that the heating or cooling is necessary, the heating or cooling is continued for the watering time set by the watering time setting means.

  The watering system for concrete curing according to the present invention may further include a water storage facility for storing water and a water temperature measuring means for measuring the water temperature in the water storage facility. The water supply means in this case sends out the water in the water storage facility into the concrete curing mat. Further, the temperature adjustment control means determines whether heating is required or cooling is required based on the concrete surface temperature obtained by the concrete temperature measuring means or the water temperature obtained by the water temperature measuring means. When the temperature control means determines that the watering control means requires water spraying and the temperature adjustment control means determines that heating or cooling is required, the temperature adjustment means (after the measured concrete surface temperature and the water temperature in the water storage facility). Regardless, continue to heat or cool for the duration of watering.

  The watering system for concrete curing according to the present invention may further include water temperature setting means for setting a target water temperature based on the concrete surface temperature. The temperature adjusting means in this case warms or cools the temperature of the water sent by the water sending means to the target water temperature set by the water temperature setting means.

  The watering system for concrete curing according to the present invention can also determine whether or not watering is necessary for each divided region (a small region obtained by dividing a region where a concrete curing mat is laid). The water supply means in this case is provided in the middle of the water supply pipe, the water supply pipe connected to each branch port provided in the branch means for branching the water from the pressure feed means for pumping the water into two or more, the branch means The discharge port of a water pipe is arrange | positioned for every division area. Moreover, a water | moisture content measurement means is each installed for every division area, and a watering control means judges the necessity of watering for every division area. And the water spray control means opens the water pipe opening valve corresponding to the divided area determined to be required to spray water into the concrete curing mat in the divided area. Furthermore, in the watering system for concrete curing according to the present invention in this case, the temperature can be adjusted for each water pipe. Specifically, the concrete temperature measuring means is installed for each divided area, and the temperature adjustment control means determines whether heating is required or cooling is required for each divided area. And the temperature control means installed for every water pipe with respect to the water of the water pipe corresponding to the division | segmentation area | region which the watering control means judged to require watering and the temperature adjustment control means judged to require heating or cooling required Warms or cools.

  The watering system in the concrete curing according to the present invention can spray water so as not to overlap two or more divided regions. In this case, the watering control means sets the opening time and closing time of the opening valve so that only one opening valve is opened at the same time when it is determined that watering is required for two or more divided areas. Each opening valve opens and closes based on the opening time and closing time set by the watering control means.

  The watering method in the concrete curing of the present invention is a method of watering the concrete surface by sending out water by means of water feeding means, a curing mat laying step, a moisture measuring step, a concrete temperature measuring step, a watering determining step, a temperature adjustment determining step It is a method provided with. Of these, in the curing mat laying process, a concrete curing mat is laid on the concrete after pouring, and in the moisture measurement process, the moisture state is measured by a moisture measuring means installed between the concrete curing mat and the concrete surface, and the concrete temperature is measured. In the measuring step, the concrete surface temperature is measured by the concrete temperature measuring means. In the water sprinkling judgment step, the necessity of water sprinkling is judged based on the wet state obtained in the moisture measurement step, and in the temperature adjustment judgment step, the water supply means is based on the concrete surface temperature obtained in the concrete temperature measurement step. The necessity of heating or cooling the water sent by is determined. Then, when it is determined that the required watering is required in the watering determination process, water is continuously supplied by the water supply means for the predetermined watering time, the watering determination process determines that the watering is required, and the temperature adjustment determination process requires heating or cooling. When it is determined, the water sent by the water feeding means is continuously heated or cooled for the sprinkling time (regardless of the concrete surface temperature measured thereafter).

The watering system for concrete curing and the watering method for concrete curing of the present invention have the following effects.
(1) Since the watering work is automatically performed, the labor required for humans is remarkably reduced, and the work cost can be reduced.
(2) Since cold curing and hot concrete can be appropriately wet-cured with curing water at an appropriate temperature, high-quality concrete can be reliably obtained.
(3) Since the temperature of the curing water is automatically adjusted according to the concrete temperature, it does not take time and labor for humans, and even if water is sprayed with curing water at an appropriate temperature, the operation cost can be reduced.
(4) Since the watering judgment and the temperature adjustment judgment are mechanically performed using a computer or the like, an accurate watering work that eliminates human error (for example, forgetting watering work or incorrect temperature adjustment) is practiced.

The top view which shows the state which installed the watering system in the concrete curing of this invention in the bridge floor slab. The flowchart which shows a series of flow from concrete placement to curing completion. The block diagram which shows the structure of the watering system in the concrete curing of this invention. (A) is a model figure which shows the moisture sensor before mounting | wearing with a water absorbing material, (b) is a model figure which shows the moisture sensor after mounting | wearing with a water absorbing material. The flowchart which shows the flow of the main process in the driving | operation of the watering system in the concrete curing of this invention. The flowchart which shows the flow of the main process at the time of a temperature adjustment control means judging the necessity of temperature control of curing water based on concrete surface temperature. The flow figure which shows the flow of the main process at the time of temperature adjustment control means judging the necessity of temperature control of curing water based on concrete surface temperature and water source temperature. The model figure explaining the function of a water supply warning means and a charge warning means. The top view which shows the condition which installs the watering system in the concrete curing of this invention in a bridge floor slab, and waters for every division area. The block diagram which shows the structure of the watering system in the concrete curing of 2nd Embodiment. The block diagram which shows the structure of the watering system in the concrete curing by which the temperature control means was each installed in each water pipe in 2nd Embodiment. The flowchart which shows the flow of the process which waters so that a some open valve may not be released twice at the same time.

  An example of embodiments of a watering system for concrete curing and a watering method for concrete curing according to the present invention will be described with reference to the drawings.

1. General Description The watering system for concrete curing and the watering method for concrete curing according to the present invention can be implemented for any concrete structure, but here, a concrete floor slab of a bridge will be described as an example for convenience. FIG. 1 is a plan view showing a state in which a watering system for concrete curing according to the present invention (hereinafter simply referred to as “watering system 300”) is installed on a concrete floor slab of a bridge (hereinafter simply referred to as “floor slab 100”). It is the top view which shows the condition where watering is performed in the range (center part in the figure) among them. In general, the slab concrete is driven for each area divided in the direction of the bridge axis (hereinafter referred to as “setting span”). In this figure, the placement span (hereinafter referred to as “curing region 110”) during wet curing after concrete placement is shown in the center, and the already-executed span 120 that has already been cured is placed on the right side, and concrete is still placed. A non-installed span 130 is shown on the left side.

  With reference to FIG. 2, a series of flow from concrete placement to curing completion will be described. First, after placing floor slab concrete with a predetermined placement span (Step 100), a curing mat 200 is laid on the concrete surface (Step 200). For convenience of explanation, FIG. 1 shows the curing mat 200 only in a part of the curing area 110 and the remaining portion shows the watering condition under the curing mat 200, but the curing mat 200 is actually the curing area 110. It is laid so as to cover the whole.

  When the laying of the curing mat 200 is completed, the watering work is once performed by the worker, and then the watering system 300 of the present invention is installed (Step 300). In addition, the watering work by a person can be omitted depending on the situation at the site. When the watering system 300 can be installed, the operation of the watering system 300 is started (Step 400). The watering system 300 performs watering to maintain a wet state in the curing mat 200 (between the curing mat 200 and the concrete surface), and appropriately performs watering according to the wet state (or dry state). . In addition, when watering, the curing water (water for watering) is adjusted to an appropriate temperature according to the concrete surface temperature.

  As described above, the period of wet curing of the concrete is predetermined (for example, one week for normal Portland cement with a daily average temperature of 10 ° C.), so the watering system 300 is continuously operated during this period (Step 400). When the curing period has elapsed (Step 500: Yes), the watering system 300 and the curing mat 200 are removed (Step 600), and the wet curing of the curing area 110 is finished.

  Hereinafter, watering using the watering system 300 of the present invention will be described in more detail. In addition, the watering system 300 can spray water to the whole curing area | region 110, and can also spray water for every small area | region (henceforth "divided area | region") which divided the curing area | region 110 into plurality. Therefore, a case where water is sprayed over the entire curing area 110 is referred to as a first embodiment, and a case where water is sprayed for each divided area is referred to as a second embodiment.

2. 1st Embodiment Each means which comprises the watering system 300 of this invention is demonstrated referring FIG. FIG. 3 is a block diagram showing the configuration of the watering system 300 of the present invention.

(Water supply means)
FIG. 3 shows an example in which the water stored in the water storage facility 301 is sprinkled into the curing mat 200 (between the curing mat 200 and the concrete surface) in the curing area 110, and downstream from the upstream side (water storage facility 302). When viewed from the side (curing mat 200), the water storage equipment 301, the water supply pipe 302, the pressure feeding means 303, the water feeding pipe 304, the release valve 305, and the water discharge means 306 are connected in this order. The water storage facility 301 is a so-called water storage tank, and is a container that can store a necessary amount of water. For example, a hose having a predetermined diameter can be used as the water supply pipe 302, and a weight is fixed to the tip of the water supply pipe 302 and is set in the water in the water storage facility 301.

  The pumping means 303 supplies water from the water storage facility 301 through the water supply pipe 302 and pumps this water forward (downstream). The pumping means 303 used in the present invention can be selected from those driven by various powers, but here, an explanation will be given for an electric pump driven by electric power. In addition, an electric pump that receives electric power supplied from an electric power company can be used, and a rechargeable (battery type) electric pump can also be used. In addition, when the pressure of the water supply pipe 304 is sensed and a predetermined pressure is not applied (for example, when the valve is open), the pressure is automatically fed and when the predetermined pressure is applied (for example, when the valve is closed) ) Since there is an electric pump of a type that automatically stops the pumping, the electric pump of this type may be adopted in the present invention.

  The water supply pipe 304 is a pipe for supplying the water pressure-fed from the pressure-feeding means 301 to the front (downstream side). For example, a metal pipe or a hose having a predetermined diameter can be used. An open valve 305 is installed in the middle of the water supply pipe 304, and a water discharge means 306 is connected to the tip of the open valve 305. The release valve 305 controls the water supply to the destination, that is, when the release valve 305 is opened, the water in the water supply pipe 304 is sent to the water discharge means 306, and when the release valve 305 is closed, the water in the water supply pipe 304 is It is not sent to the water outlet means 306. Moreover, what has a memory | storage means (data logger) can also be utilized for the open valve 305 used for this invention. In this storage means, the opening / closing time (opening time and closing time) of the open valve 305 and the measurement value obtained by the moisture sensor connected by wire can be stored. In the present embodiment, the release valve 305 can be omitted (not provided).

  As long as the water discharge means 306 has a large number of water outlets and can discharge multiple lines at the same time, various conventionally used products such as Evaflow (registered trademark) can be used. The main body of the water discharge means 306 has a cylindrical shape (hose shape), one end of the main body is closed and the other end is opened, and a number of water outlets are provided in the main body. That is, the water sent through the water supply pipe 304 flows from the opening end of the main body of the water outlet means 306 and is sprayed from the water outlet of the main body. When the floor slab 100 is provided with a transverse gradient, it is desirable to install the water discharge means 280 on the higher side in the direction perpendicular to the bridge axis.

(Sprinkling control means)
The watering control means 311 determines whether or not watering is necessary according to the wet state in the curing mat 200, and can be manufactured as a dedicated one, but a general-purpose computer device can also be used. The water sprinkling control means 311 that has received the measurement value (hereinafter referred to as “moisture measurement value”) of the moisture measurement means (hereinafter referred to as “moisture sensor 312”) installed between the curing mat 200 and the concrete surface, The necessity of watering is determined in light of the threshold value (hereinafter referred to as “wetting threshold value”) set to “1”. When the measured moisture value falls below the wet threshold, it is determined that the inside of the curing mat 200 is dry enough to spray water, and watering is necessary. When the measured moisture value exceeds the wet threshold value, the wet mat is sufficiently wet. Therefore, it is judged that watering is not necessary. And the watering control means 311 judged to be watering required issues a command to the opening valve 305 to open (water discharge). Alternatively (for example, in the case where the release valve 305 is not installed), the watering control means 311 can directly issue a command to pump the pumping means 303. The moisture measurement value of the moisture sensor 312 and the water discharge (stop) command to the open valve 305 and the pressure feeding means 303 can be transmitted / received by wire or, of course, transmitted / received wirelessly.

  As long as the moisture sensor 312 is installed between the curing mat 200 and the concrete surface and can measure the wet state (dried state) in the curing mat 300, various products that have been conventionally used are used. can do. However, it is difficult to directly measure the wet state around the moisture sensor 312. In that case, a water absorbing material may be used. FIG. 4 is a model diagram showing a moisture sensor 312 using the water absorbing material 312s, where (a) shows a state before the water absorbing material 312s is mounted, and (b) shows a state after the water absorbing material 312s is mounted. As shown in FIG. 4A, the moisture measuring means includes a detection unit 312t that measures a wet state, and a water absorbing material 312s such as a sponge is attached to this portion. Specifically, a cut or cavity is provided in the water absorbing material 312s, and the detection unit 312t is inserted into the cut portion (FIG. 4B). As a result, the detection unit 312t measures the water absorbing material 312s that has absorbed moisture, and can easily and accurately measure the wet state in the curing mat 300.

(Temperature adjustment control means)
The temperature adjustment control means 321 determines whether or not the temperature of water sprayed from the water discharge means 306 (that is, curing water) needs to be adjusted, and can be manufactured as a dedicated one. Can also be used. Therefore, the watering control means 311 and the temperature adjustment control means 321 can be constituted by one computer device, and the watering control means 311 and the temperature adjustment control means 321 can be constituted by different computer devices, respectively.

  Temperature adjustment control means 321 that has received a measurement value (hereinafter referred to as “concrete surface temperature”) of a concrete temperature measurement means (hereinafter referred to as “concrete temperature sensor 322”) installed between the curing mat 200 and the concrete surface. Determines whether the temperature of the curing water needs to be adjusted in light of a preset threshold value. When the concrete surface temperature is lower than a predetermined lower limit temperature, it is determined that the curing water needs to be heated. Conversely, when the concrete surface temperature exceeds a predetermined upper limit temperature, it is determined that cooling is required. Heating and cooling of the curing water is performed by temperature adjusting means 323 installed in the middle of the water supply pipe 302 and the water supply pipe 304. The temperature adjusting means 323 heats and cools the curing water in the water supply using electricity, gas, or the like, and is preferably capable of adjusting the temperature in a relatively short time.

  In addition to (or instead of) the concrete surface temperature, the temperature adjustment control means 321 is a measured value (hereinafter referred to as “water source temperature”) of a water temperature measuring means (hereinafter referred to as “water temperature gauge 324”) installed in the water storage facility 301. Based on the above, it is possible to determine whether or not the temperature of the curing water needs to be adjusted. When either the concrete surface temperature or the water source temperature (or both) is below the lower limit temperature, it is judged that the curing water needs to be heated. Conversely, either the concrete surface temperature or the water source temperature (or both) is When exceeding the upper limit temperature, it is judged that cooling is necessary.

  The temperature adjustment control means 321 determined to require heating or cooling requires the temperature adjustment means 323 to perform heating or cooling. However, since it is useless to heat or cool the curing water even though it is not sprinkled, a temperature adjustment command is issued to the temperature adjusting means 323 only when the watering control means 311 determines that watering is necessary. The concrete surface temperature of the concrete temperature sensor 322, the moisture measurement value of the water thermometer 324, and the temperature adjustment command to the temperature adjusting means 323 can be transmitted / received by wire, and of course can be transmitted / received wirelessly.

  As long as the concrete temperature sensor 322 can measure the concrete surface temperature, various products conventionally used can be used. Similarly, as long as the water temperature meter 324 can measure the temperature in water, various products that have been conventionally used can be used. The temperature measurement by the concrete temperature sensor 322 and the water temperature gauge 324 is performed continuously or at a relatively short time interval (shorter than the time interval at which the watering control means 311 determines whether watering is necessary).

(Operation of watering system)
Next, the operation (FIG. 2: Step 400) of the watering system 300 will be described in detail. FIG. 5 is a flowchart showing a main processing flow in the operation of the watering system 300. As described above, the watering control means 311 determines whether or not watering is necessary, but this necessity determination is performed at a predetermined time, and normally the standby state (Step 410) is maintained, and the time when the necessity should be determined. If it is determined (Step 420: Yes), the process proceeds to the subsequent process. In addition, the time when the necessity of watering should be judged can be set at regular intervals such as every hour or every 30 minutes, or in the morning and evening may be set at irregular intervals such as being concentrated in the daytime. You can also.

  The watering control means 311 receives the moisture measurement value from the moisture sensor 312 (or the storage means of the open valve 305) through the wireless or wired communication means (Step 431), and compares it with the wetting threshold value (Step 432). And when a water | moisture-content measured value exceeds a moisture threshold value (No), it returns to a standby state (Step410), and when a water | moisture-content measured value is less than a threshold value (Yes), after determining with watering required, it responded to the water | moisture-content measured value. Watering time is set (Step 433). For example, when the moisture measurement value is slightly below the threshold, a short watering time is set, and when the moisture measurement value is significantly below the threshold, a long watering time is set. Here, without setting the watering time (step 433 is omitted), it is also possible to perform the subsequent processing using a predetermined time (that is, determined regardless of the moisture measurement value) as the watering time.

  On the other hand, the concrete temperature sensor 322 and the water thermometer 324 measure the concrete surface temperature and the water source temperature continuously (or at relatively short time intervals), and based on the measurement results, the temperature adjustment control means 321 performs curing. Determine whether water temperature needs to be adjusted. This necessity determination can be performed whenever necessary, every time the measurement result of the concrete temperature sensor 322 or the water temperature gauge 324 is received, or when the water spray control means 311 determines that water spray is required as shown in FIG. 5 (Step 432: Yes). Can also be done.

  The necessity determination of the temperature adjustment of the curing water performed by the temperature adjustment control means 321 will be described with reference to FIGS. FIG. 6 is a flowchart showing a main processing flow when the temperature adjustment control means 321 determines whether or not the temperature of the curing water needs to be adjusted based on the concrete surface temperature, and FIG. 7 shows the temperature adjustment control means 321. FIG. 4 is a flowchart showing a main processing flow when determining whether or not the temperature of the curing water needs to be adjusted based on the concrete surface temperature and the water source temperature.

  In the case of FIG. 6, it is first determined whether or not the concrete surface temperature obtained by the concrete temperature sensor 322 is within an allowable range (Step 441). When the concrete surface temperature is between the upper limit temperature and the lower limit temperature (Yes), the curing water is sprinkled as it is without heating or cooling (Step 460). When the concrete surface temperature is lower than the lower limit temperature (Step 442: Yes), the curing water is heated (Step 452). At this time, heating can be performed for a predetermined time with a predetermined amount of heat, or a target temperature can be set according to the concrete surface temperature (Step 451), and the curing water can be heated until the target temperature is reached. On the other hand, when the concrete surface temperature exceeds the upper limit temperature (Step 443: Yes), the curing water is cooled (Step 454). Also in this case, it is possible to cool for a predetermined time with a predetermined amount of heat, or to set the target temperature according to the concrete surface temperature (Step 453) and to cool the curing water until the target temperature is reached. Then, the temperature-adjusted curing water is sprinkled from the water outlet means 306 into the curing mat 200 (Step 460).

  In the case of FIG. 7, whether or not the temperature of the curing water needs to be adjusted is determined based on not only the concrete surface temperature but also the water source temperature. For example, even if the concrete surface temperature is within an allowable range, if the curing water to be sprinkled is extremely low, the concrete surface temperature may also decrease. Monitoring the water source temperature in addition to the concrete surface temperature can prevent such a situation and is preferable. In this case, it is determined whether the concrete surface temperature obtained by the concrete temperature sensor 322 and the water source temperature obtained by the water thermometer 324 are within an allowable range (Step 444). When both the concrete surface temperature and the water source temperature are between the upper limit temperature and the lower limit temperature (Yes), the curing water is sprinkled as it is without heating or cooling (Step 460). When one (or both) of the concrete surface temperature or the water source temperature is lower than the lower limit temperature (Step 445: Yes), the curing water is heated (Step 456). At this time, it is possible to heat for a certain period of time with a predetermined amount of heat, or to set a target temperature according to the concrete surface temperature and water source temperature (Step 455), and to warm the curing water until it reaches the target temperature You can also. In this case, the target temperature can also be set so that the temperature difference between the concrete surface temperature and the water source temperature is within an allowable value (temperature difference threshold). On the other hand, when the concrete surface temperature exceeds the upper limit temperature (Step 446: Yes), the curing water is cooled (Step 458). In this case as well, it can be cooled for a certain time with a predetermined amount of heat, or a target temperature can be set according to the concrete surface temperature and water source temperature (Step 457), and the curing water can be cooled until the target temperature is reached. it can. Also in this case, the target temperature can be set based on the temperature difference threshold. Then, the temperature-adjusted curing water is sprinkled from the water outlet means 306 into the curing mat 200 (Step 460).

  As shown in the flowchart of FIG. 5, the watering time set according to the moisture measurement value (or a predetermined watering time set in advance) is continuously watered (Steps 460 to 470). That is, even if the watering control means 311 determines that watering is not necessary during watering, watering is continued until the watering time has elapsed. The time at which the watering control means 311 determines whether watering is necessary may be set so that the interval is equal to or longer than the watering time.

  Further, when the temperature adjustment control means 321 issues a command to heat or cool the temperature adjustment means 323 (that is, the watering control means 311 determines that watering is necessary, and the temperature adjustment control means 321 adjusts the temperature required. When it is determined that), the watering time set according to the moisture measurement value (or a predetermined constant watering time) continues to heat or cool the curing water (Steps 450 to 470). That is, even if the temperature adjustment control means 321 determines that the temperature adjustment is unnecessary during the heating or cooling, the heating or cooling is continued until the watering time has elapsed. Since the concrete temperature sensor 322 is installed between the curing mat 200 and the concrete surface, and the temperature-adjusted curing water is sprayed between the curing mat 200 and the concrete surface, the concrete temperature sensor 322 is once watered. The temperature of the curing water will be measured rather than the concrete surface temperature. That is, the measurement result of the concrete temperature sensor 322 in the watering is not considered to be the temperature of the concrete surface, and therefore the temperature adjustment necessity determination of the temperature adjustment control means 321 based on the measurement result is poor in reliability. Therefore, it is not appropriate to stop the heating or cooling according to the determination of the temperature adjustment control means 321 in the watering, and the initial determination (determination of temperature adjustment required) of the temperature adjustment control means 321 is followed until the watering time elapses. That is why.

(Water supply warning means and charge warning means)
The watering system 300 of the present invention may include a water supply warning means and a charge warning means. FIG. 8 is a model diagram for explaining the functions of the water supply warning means and the charge warning means. The water supply warning means and the charging warning means can be manufactured as dedicated ones as with the watering control means 311, but a general-purpose computer device can also be used. Of course, a computer device used as the water spray control means 311 or the temperature adjustment control means 321 can also be used.

  As shown in FIG. 8, the opening time storage means receives and stores the opening time / closing time of the opening valve 305 from the storage means (data logger) of the opening valve 305 via a wireless or wired communication means. Then, the water supply warning means estimates the amount of water sprayed by the opening valve 305 as the “estimated watering amount” based on the opening time / closing time of the opening valve 305 read from the opening time storage means. Further, the water supply warning means compares the estimated watering amount with the preset water storage capacity of the water storage facility 301, and when the estimated watering amount approaches the water storage capacity, information indicating that water should be supplied to the water storage facility 301 is displayed. For example, display on a display). In addition, when not installing the release valve 305, it is good to estimate an estimated watering amount based on the operation time (pumping time) of the pumping means 303. FIG.

  In the case where a rechargeable (battery type) electric pump is used as the pressure feeding means 303, a charging warning means may be provided. The charging warning means compares the operation time (pumping time) of the pressure feeding means 303 with a preset possible operation time (time that can be operated by one charge), and when the estimated operation time approaches the possible operation time, “pumping” Information indicating that the means 303 should be charged is displayed on the display means. In addition, when the opening valve 305 having a storage means (data logger) is installed, the operating time of the pressure feeding means 303 is estimated based on the opening time / closing time of the opening valve 305 read from the opening time storage means. Good.

3. Second Embodiment While the first embodiment sprays water on the entire curing area 110, the second embodiment differs in that water is sprayed for each divided area of the curing area 110, but is otherwise common. There are many contents. Therefore, the description regarding the same content as 1st Embodiment is omitted here, and the content peculiar to 2nd Embodiment shall be demonstrated. That is, the contents not described here are the same as the contents of the first embodiment already described.

(Division area)
In this embodiment, water is sprayed independently for each of the divided areas obtained by dividing the curing area 110 into a plurality of areas. For example, in FIG. 9, the curing area 110 is divided into three parts: a first divided area 110a, a second divided area 110b, and a third divided area 110c. In this figure, it is divided into three in the direction of the bridge axis, but it may be divided in the direction perpendicular to the bridge axis, or may be divided by combining the direction of the bridge axis and the direction perpendicular to the bridge axis. The above division can also be performed.

(Water supply means)
FIG. 10 is a block diagram showing a configuration of a watering system 300 in the second embodiment. As shown in this figure, in this embodiment, a branching unit 307 for branching water from the pumping unit 303 into two or more is installed. And the water supply pipe | tube 304 is each connected with each branch port which the branch means 307 comprises, and the discharge port of each water supply pipe | tube 304 is distributed and arrange | positioned for every division area. For example, in FIGS. 9 and 10, the first water pipe 304a, the second water pipe 304b, and the third water pipe 304c are connected to the branch port of the branching unit 307, and the discharge port of the first water pipe 304a is the first divided region. 110a, the outlet of the second water pipe 304b is arranged in the second divided area 110b, and the outlet of the third water pipe 304c is arranged in the third divided area 110c.

  In the middle of each water pipe 304 (first water pipe 304a, second water pipe 304b, third water pipe 304c), an open valve 305 (first open valve 305a, second open valve 305b, third open valve 305c) is provided. Further, the water discharge means 306 (first water discharge means 306a, second water discharge means 306b, and third water discharge means 306c) are connected to the respective tips. Similarly to the first embodiment, in this embodiment, an open valve 305 having a storage means (data logger) can be used, and the water discharge means 306 can be a variety of products conventionally used such as Evaflow (registered trademark). Can be used.

(Sprinkling control means)
The watering control means 311 determines whether watering is necessary for each divided area. Specifically, moisture sensors 312 (first moisture sensor 312a, second moisture sensor 312b, and third moisture sensor 312c) are installed in each of the first divided region 110a, the second divided region 110b, and the third divided region 110c. The watering control means 311 that has received the moisture measurement value of each moisture sensor 312 determines whether watering is necessary for each divided region in light of the wetting threshold. For example, the watering control means 311 determines that “watering is required” in the moisture measurement value of the second moisture sensor 312b installed in the second divided area 110b, and the first moisture sensor 312a installed in the first divided area 110a and the first moisture sensor 312b. According to the moisture measurement value of the third moisture sensor 312c installed in the three-divided area 110c, it may be determined that “watering is unnecessary”.

  The moisture sensor 312 is installed between the curing mat 200 and the concrete surface, as in the first embodiment. However, at least one moisture sensor 220 is disposed in each divided region. For example, in FIGS. 9 and 10, the first moisture sensor 312a is arranged in the first divided region 110a, the second moisture sensor 312b is arranged in the second divided region 110b, and the third moisture sensor 312c is arranged in the third divided region 110c. In the present embodiment, as in the first embodiment, various products that have been conventionally used can be used, and the moisture sensor 312 including the water absorbing material 312s shown in FIG. 4 can also be used.

(Temperature adjustment control means)
The temperature adjustment control means 321 determines whether or not the temperature of the curing water sprayed from each of the water discharge means 306 is necessary. Similar to the first embodiment, whether or not the temperature adjustment is necessary is determined based on the concrete surface temperature. (The flow in FIG. 6) can be performed, or the necessity of temperature adjustment can be determined based on the concrete surface temperature and the water source temperature (the flow in FIG. 7).

  The concrete temperature sensor 322 is installed between the curing mat 200 and the concrete surface, and one concrete temperature sensor 322 can be installed in the curing area 110 or the concrete temperature sensor 322 can be installed for each divided area. When one concrete temperature sensor 322 is installed in the curing area 110, the measurement result of the concrete temperature sensor 322 is used as a concrete surface temperature representative of the curing area 110 to determine whether temperature adjustment is necessary. Moreover, as shown in FIG. 9 and FIG. 10, when the concrete temperature sensor 322 is installed for every division area, it can be judged whether temperature adjustment is necessary for every division area. For example, in the examples of FIGS. 9 and 10, the temperature adjustment for the first divided region 110a is performed based on the concrete surface temperature (or the concrete surface temperature and the water source temperature) of the first concrete temperature sensor 322a installed in the first divided region 110a. The necessity of temperature adjustment for the second divided region 110b is determined based on the concrete surface temperature (or the concrete surface temperature and the water source temperature) of the second concrete temperature sensor 322b installed in the second divided region 110b. Judgment is made, and the necessity of temperature adjustment for the third divided region 110c is determined based on the concrete surface temperature (or the concrete surface temperature and the water source temperature) of the third concrete temperature sensor 322c installed in the third divided region 110c. That is why.

  The temperature adjustment control unit 321 issues a temperature adjustment command to the temperature adjustment unit 323 when the watering control unit 311 determines that watering is necessary and determines that heating or cooling is necessary. Only one temperature adjusting means 323 can be installed in the middle of the water supply pipe 302 or the water supply pipe 304, or can be installed for each water supply pipe 304. 9 and 10, one temperature adjusting means 323 is installed in the water supply pipe 302. In FIG. 11, each water supply pipe 304 (first water supply pipe 304a, second water supply pipe 304b, and third water supply pipe 304c) is provided. The temperature adjusting means 323 (first temperature adjusting means 323a, second temperature adjusting means 323b, and third temperature adjusting means 323c) are provided.

  In the case of FIG. 9 and FIG. 10, since 1 is determined for all the water pipes 304, the cured water in all the water pipes 304 is heated or cooled, or the cured water in all the water pipes 304 is It will not be heated or cooled. Therefore, in the case of FIGS. 9 and 10, when the temperature adjustment control means 321 determines whether or not temperature adjustment is required for each divided area, heating is performed when it is determined that the temperature adjustment is required even in one divided area. Alternatively, cooling is performed, and heating or cooling is preferably performed only when it is determined that temperature adjustment is not necessary in all the divided regions. On the other hand, in the case of FIG. 11, when the temperature adjustment control means 321 determines whether or not temperature adjustment is required for each divided area, a corresponding process is performed on the corresponding water pipe 304 according to the determination of each divided area. Good. For example, when it is determined that only the second divided area 110b needs to be heated, and it is determined that temperature adjustment is unnecessary in the first divided area 110a and the third divided area 110c, the second temperature installed in the second water pipe 304b. The temperature adjustment control means 321 sends a command so as to heat only the adjustment means 323b.

(Operation of watering system)
In the present embodiment, as in the first embodiment, the necessity of watering is determined as shown in the flowchart of FIG. 5, and the temperature adjustment of the curing water is required as shown in the flowcharts of FIGS. A determination is made that the curing water whose temperature has been adjusted (or the temperature is not adjusted) is sprayed from the water discharge means 306 into the curing mat 200. However, in this embodiment, the necessity determination of watering is performed for every division area, and the necessity determination of the temperature adjustment of curing water is performed for the whole curing area 110 or for every division area. The watering control means 311 can set the watering time for each divided area, or can set one watering time on behalf of the curing area 110 (in this case, for example, the longest watering time is adopted). It is good.) Or, without setting the watering time, it is possible to perform the subsequent processing by setting a predetermined time as the watering time.

  In the present embodiment, since the necessity of watering is determined for each divided area, it is determined that watering is necessary in two or more divided areas, and a command to open (spout) the corresponding release valve 305 is issued. Sometimes. In this case, it is preferable to set the opening time and closing time of each opening valve 305 so that the plurality of opening valves 305 are not released at the same time. This is because the pumping ability of the pumping means 303 is concentrated on one open valve 305 (that is, the water supply pipe 304) without being dispersed, so that even when the pumping means 303 having a relatively small pumping capacity is used, it is divided. Watering that sufficiently covers the area can be performed.

  FIG. 12 is a flowchart showing a flow of processing for watering so that a plurality of release valves 305 are not released at the same time. If the watering control means 311 is determined to require watering (Step 432 of FIG. 5: Yes), it is determined whether there are two or more divided areas determined to be watering required (Step 434). Here, if there is only one divided region determined to require watering, the subsequent processing (Steps 433) is performed according to the flow shown in FIG. If there are two or more divided areas determined to require watering, a watering time is set for each divided area of watering required (Step 435). At this time, the opening time and closing time of the release valve 305 are set so that the plurality of divided areas are not sprinkled with water, that is, the plurality of release valves 305 are not released at the same time. To do. For example, when it is determined that the second divided area 110b and the third divided area 110c require watering and the watering time is set to 30 minutes, the second release valve 305b corresponding to the second divided area 110b is set to 10:00. The third opening valve 305c corresponding to the third divided region 110c is opened at 10:30 and closed at 11:00 minutes, and is opened at 10:30 minutes.

  When the watering time (opening time and closing time of the release valve 305) is set for each of the required watering divided areas, the temperature of the curing water is adjusted as necessary (Step 440 to Step 450), and then the necessary watering is divided in order. Watering is performed on the area (Step 460). When watering is completed in all the divided areas that are considered to require watering, the process returns to the determination of whether the curing period has elapsed (Step 500).

  In this embodiment as well as the first embodiment, when the watering control means 311 determines that watering is necessary, the watering time set according to the moisture measurement value (or a predetermined watering time set in advance) is continuously watered. To do. Further, when the temperature adjustment control means 321 issues a command to heat or cool the temperature adjustment means 323 (that is, the watering control means 311 determines that watering is necessary, and the temperature adjustment control means 321 adjusts the temperature required. When it is determined that), the curing water is continuously heated or cooled for the watering time set according to the moisture measurement value (or a predetermined constant watering time).

(Water supply warning means and charge warning means)
Also in this embodiment, a water supply warning means and a charge warning means can also be provided similarly to 1st Embodiment. As shown in FIG. 8, the opening time storage means receives and stores the opening time / closing time of the opening valve 305 from the storage means (data logger) of each opening valve 305 via wireless or wired communication means. Then, the water supply warning means estimates the total amount of water sprinkled by the opening valve 305 as “estimated watering amount” based on the opening time / closing time of each opening valve 305 read from the opening time storage means. Further, the water supply warning means compares the estimated watering amount with the preset water storage capacity of the water storage facility 301, and when the estimated watering amount approaches the water storage capacity, information indicating that water should be supplied to the water storage facility 301 is displayed on the display means. Display.

  In the case where a rechargeable (battery type) electric pump is used as the pressure feeding means 303, a charging warning means may be provided. The charging warning means estimates the operation time (pumping time) of the pressure feeding means 303 based on the opening time / closing time of each opening valve 305 read from the opening time storage means, and this operation time and a preset possible operation When the time (time that can be operated by one charge) is compared and the estimated operation time approaches the possible operation time, the information that “the pumping means 303 should be charged” is displayed on the display means.

  The watering system in concrete curing and the watering method in concrete curing according to the present invention can be used for concrete floor slabs, abutments, and piers of bridges of all uses such as road bridges and railway bridges, bridges over rivers, bridges, and bridges. It can be used for bridges that exceed various things. Moreover, it can be used not only for bridges but also for various concrete structures such as tunnel lining concrete and large concrete retaining walls. Considering that the present invention provides a good-quality concrete structure, that is, a high-quality social infrastructure (infrastructure), it can be used not only industrially but can also be expected to make a great social contribution. It can be said that it is an invention.

DESCRIPTION OF SYMBOLS 100 (Concrete of bridge) Floor slab 110 Curing area 110a 1st division area 110b 2nd division area 110c 3rd division area 120 Existing span 130 Unconstructed span 200 Curing mat 300 Sprinkling system in concrete curing of the present invention 301 Water storage facility 302 Water supply pipe 303 Pressure feeding means 304 Water feeding pipe 304a First water feeding pipe 304b Second water feeding pipe 304c Third water feeding pipe 305 Opening valve 305a First opening valve 305b Second opening valve 305c Third opening valve 306 Water discharging means 306a First water discharging means 306b 2nd water discharge means 306c 3rd water discharge means 307 Branch means 311 Sprinkling control means 312 Moisture sensor 312a 1st moisture sensor 312b 2nd moisture sensor 312c 3rd moisture sensor 312b 2nd moisture sensor 312s Water absorbing material 312t detection part 3 DESCRIPTION OF SYMBOLS 1 Temperature adjustment control means 322 Concrete temperature sensor 322a 1st concrete temperature sensor 322b 2nd concrete temperature sensor 322c 3rd concrete temperature sensor 323 Temperature adjustment means 323a 1st temperature adjustment means 323b 2nd temperature adjustment means 323c 3rd temperature adjustment means 324 Water temperature gauge

Claims (8)

In the sprinkling system that sprinkles the concrete surface where the concrete curing mat is laid,
Water supply means for sending water into the concrete curing mat and sprinkling water;
Moisture measuring means installed between the concrete curing mat and the concrete surface and measuring the surrounding wet state;
Based on the wet state obtained by the moisture measuring means, watering control means for determining the necessity of watering,
A concrete temperature measuring means installed between the concrete curing mat and the concrete surface and measuring the concrete surface temperature;
Temperature adjusting means for heating or cooling the water sent by the water feeding means;
Based on the concrete surface temperature obtained by the concrete temperature measuring means, temperature adjustment control means for judging whether heating or cooling by the temperature adjusting means is necessary,
With
When the watering control means determines that watering is required, the watering means continuously waters for a predetermined watering time,
When the watering control means determines that watering is required and the temperature adjustment control means determines that heating or cooling is required, the temperature adjusting means is configured to perform the watering time regardless of the concrete surface temperature measured thereafter. Just keep warming or cooling,
A watering system in concrete curing characterized by that. In the sprinkling system that sprinkles the concrete surface where the concrete curing mat is laid,
Water supply means for sending water into the concrete curing mat and sprinkling water;
Moisture measuring means installed between the concrete curing mat and the concrete surface and measuring the surrounding wet state;
Based on the wet state obtained by the moisture measuring means, watering control means for determining the necessity of watering,
Watering time setting means for setting the watering time based on the wet state obtained by the moisture measuring means;
A concrete temperature measuring means installed between the concrete curing mat and the concrete surface and measuring the concrete surface temperature;
Temperature adjusting means for heating or cooling the water sent by the water feeding means;
Based on the concrete surface temperature obtained by the concrete temperature measuring means, temperature adjustment control means for judging whether heating or cooling by the temperature adjusting means is necessary,
With
When the watering control means determines that watering is required, the water feeding means continuously waters the watering time set by the watering time setting means,
When the watering control means determines that watering is required and the temperature adjustment control means determines that heating or cooling is required, the temperature adjusting means is configured to perform the watering time regardless of the concrete surface temperature measured thereafter. Just keep warming or cooling,
A watering system in concrete curing characterized by that. A water storage facility for storing water;
Water temperature measuring means for measuring the water temperature in the water storage facility;
Further comprising
The water supply means sends out water in the water storage facility into the concrete curing mat,
The temperature adjustment control means determines the required heating or cooling required based on the concrete surface temperature obtained by the concrete temperature measuring means or the water temperature obtained by the water temperature measuring means,
When the watering control means determines that water is required and the temperature adjustment control means determines that heating or cooling is required, the temperature adjustment means may measure the concrete surface temperature measured thereafter and the water temperature in the water storage facility. Regardless of whether it is heated or cooled continuously for the watering time,
The watering system in the concrete curing according to claim 1 or 2, characterized by things. Water temperature setting means for setting a target water temperature based on the concrete surface temperature obtained by the concrete temperature measuring means, further comprising:
The temperature adjusting means warms or cools the temperature of the water sent by the water feeding means to the target water temperature set by the water temperature setting means;
The watering system in the concrete curing according to any one of claims 1 to 3, wherein The water feeding means includes a pressure feeding means for pumping water, a branching means for branching the water from the pressure feeding means into two or more, a water feeding pipe connected to each branch port provided in the branching means, An open valve provided on the way,
For each divided region obtained by dividing the region where the concrete curing mat is laid, a discharge port of the water pipe is arranged,
The moisture measuring means is installed for each of the divided areas,
The watering control means determines the necessity of watering for each of the divided areas,
By opening the release valve of the water pipe corresponding to the divided area determined by the watering control means to be required watering, water is sprayed into the concrete curing mat in the divided area.
The watering system in the concrete curing according to any one of claims 1 to 4, wherein The concrete temperature measuring means is installed for each of the divided areas,
The temperature adjustment control means determines whether heating or cooling is necessary for each of the divided regions,
The temperature adjusting means installed for each of the water supply pipes is the water supply pipe corresponding to the divided area determined by the watering control means to require water spraying and the temperature adjustment control means to require heating or cooling. Warm or cool against water
The watering system for concrete curing according to claim 5. When the watering control means determines that watering is necessary for two or more of the divided areas, the opening time and closing time of the opening valve are set so that only one opening valve is opened at the same time,
7. The watering system for concrete curing according to claim 5, wherein each of the opening valves opens and closes based on an opening time and a closing time set by the watering control means. In the sprinkling method of sprinkling water on the concrete surface by sending out water by means of water supply,
A curing mat laying process for laying a concrete curing mat on the concrete after placing,
Moisture measurement step of measuring the wet state of the surroundings by means of moisture measurement means installed between the concrete curing mat and the concrete surface;
A concrete temperature measuring step for measuring the concrete surface temperature by means of the concrete temperature measuring means;
Based on the wet state obtained in the moisture measurement step, a watering determination step of determining whether watering is necessary,
Based on the concrete surface temperature obtained in the concrete temperature measurement step, a temperature adjustment determination step for determining whether heating or cooling is required for the water sent by the water feeding means,
With
When it is determined that watering is required in the watering determination step, it continues for a predetermined watering time, and water is supplied by the water supply means.
When it is determined that watering is required in the watering determination step, and when it is determined that heating or cooling is required in the temperature adjustment determination step, it continues for the watering time regardless of the concrete surface temperature measured thereafter, Heating or cooling the water sent by the water delivery means;
A watering method in concrete curing characterized by the above.

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