JP5188647B1 - Curing management system for concrete structures - Google Patents

Abstract

The present invention provides a curing management system for a concrete structure using a communication line network and capable of curing the concrete structure at a location away from the site and with high accuracy.
One surface temperature sensor is fixed to the center of a plurality of surface temperature measurement regions that divide the surface temperature measurement surface of a formwork or concrete, and one internal temperature sensor is embedded in the center of each partial concrete, The temperature data from each sensor is transmitted from the first communication calculation terminal in the field to the second communication calculation terminal of the curing temperature management station via the communication network, and the surface temperature data is measured from the surface temperature data by means of temperature distribution data analysis means. Distribution data is obtained, and measured internal temperature distribution data is obtained from each internal temperature data. As a result, the curing temperature distribution can be analyzed at the station and the curing temperature of the concrete structure can be managed with high accuracy even if the temperature manager is not resident.
[Selection] Figure 1

Description

  The present invention relates to a curing management system for concrete structures, and more particularly to a curing management system for concrete structures capable of suppressing cracks and the like that occur when curing concrete structures.

When constructing an on-site concrete structure with a large cross-section, the heat of hydration of the cement is accumulated near the center of the concrete, the internal temperature of the concrete rises, and a large tensile stress is generated by subsequent cooling. Concrete cracks are likely to occur due to the temperature difference between the surface layer and the center of the concrete. Therefore, temperature control of the concrete surface according to the outside air temperature is required during curing.
In a high temperature environment such as summer, for example, as disclosed in Patent Document 1, water is discharged onto the surface of the mold to lower the surface temperature of the concrete. Also, in a low temperature environment such as winter, the surface of the concrete is heated by covering the formwork with a curing sheet as in Patent Document 2 or heating the formwork from outside as in Patent Document 3. The temperature is increasing.

JP-A-10-266157 JP 2001-107563 A JP 2003-268976 A

  Thus, in the prior arts of Patent Documents 1 to 3, the surface temperature of concrete is directly or indirectly measured by the temperature sensor mounted on the surface of the mold or the surface of the concrete, and each measurement is performed. The signal is input to a temporary office PC using a wired or wireless LAN, and based on the temperature data obtained, either automatically or by instructions such as telephone contact from the temperature manager to the site worker, Water discharge to the above-mentioned formwork, covering of the formwork with a curing sheet, heating of the formwork with a heater, etc. were performed. Therefore, during the curing period of the concrete structure using the formwork, the worker had to be stationed at, for example, a temporary office on the site and engage in temperature control of the concrete.

  Moreover, in the conventional curing temperature management technology for concrete structures, the number of temperature sensors used is about 1 to 3 for each placement surface of the concrete structure. For this reason, grasping of the curing temperature of the concrete surface is local, and based on the local surface temperature, the temperature of the entire concrete surface is controlled. As a result, the management accuracy of the curing temperature of concrete structures was not sufficient.

  Therefore, as a result of earnest research, the inventor has measured the surface temperature measurement surface, which is the surface of the mold form during curing of concrete, or the surface of the mold side of the concrete being cured, to measure a plurality of surface temperatures in a square grid shape. It is divided into areas and one surface temperature sensor is fixed at the center position of each surface temperature measurement area, and one internal temperature sensor is embedded at the center position of each partial concrete, and then obtained from each surface temperature sensor. The surface temperature data of a plurality of surface temperature measurement regions and the internal temperature data of a plurality of partial concrete obtained from each internal temperature sensor are cured from a first communication computing terminal on the site using a communication network. When the measured surface temperature distribution data is analyzed from each surface temperature data by the temperature distribution data analysis means, respectively, is transmitted to the second communication calculation terminal of the temperature management station. Moni, analyzes the measured internal temperature distribution data from the internal temperature data. Then, obtain the temperature stress of the entire area of the concrete being cured from the obtained temperature distribution data, and if the stress value is greater than the value of the reference concrete temperature stress that is the control target of the relevant age day during the curing period , Send a command from the curing temperature management station to the site, and reduce the temperature stress of the curing concrete from the spray nozzle of the water spraying means, the curing water whose water temperature is adjusted by the water temperature adjusting means so that the value becomes small It was found that all the problems described above could be solved by spraying only the internal space of the mesh-shaped partial ribs surrounding the surface temperature measurement region selected for the purpose, and the present invention was completed.

  The present invention uses a communication network to analyze the temperature distribution of concrete being cured in real time at a location remote from the site, and based on the analysis results, the curing temperature is managed with high accuracy to control the concrete structure. The purpose is to provide a curing management system for concrete structures capable of curing.

  The invention according to claim 1 is a curing temperature measuring device for measuring a curing temperature of concrete poured into a mold when a concrete structure is constructed on site, and a curing temperature measured by the curing temperature measuring device. A curing temperature management system for a concrete structure comprising a curing temperature control device for controlling the curing temperature of the concrete, the surface of the mold during curing and the surface of the concrete during curing Any one of them is a surface temperature measurement surface divided into a plurality of square cell-shaped surface temperature measurement regions, and the surface of the mold is fitted with the mold according to the plurality of surface temperature measurement regions. A grid-like reinforcing rib is formed by connecting a plurality of grid-shaped partial ribs that divide the surface of the concrete in the vertical and horizontal directions, and the concrete being cured has a plurality of partial contours according to the plurality of surface temperature measurement regions. The curing temperature measuring device is divided into a leaf, and the plurality of surface temperature sensors fixed to the center positions of the plurality of surface temperature measurement regions and the center positions of the plurality of partial concretes correspond to each other via the concrete. A plurality of internal temperature sensors embedded to face the surface temperature sensors, surface temperature data of the plurality of surface temperature measurement regions obtained from measurement signals from the plurality of surface temperature sensors, and the plurality of internals A first communication operation terminal for transmitting the internal temperature data of the plurality of partial concrete obtained from the measurement signal from the temperature sensor from the site using a communication network, and curing temperature management away from the site The plurality of surface temperature measurement regions provided in the station and transmitted from the first communication operation terminal using the communication line network A second communication calculation terminal for receiving the surface temperature data and the internal temperature data of the plurality of partial concretes, respectively, provided in the second communication calculation terminal, and measured surface from the surface temperature data of the plurality of surface temperature measurement regions While obtaining temperature distribution data, and comprising temperature distribution data analysis means for obtaining measured internal temperature distribution data from the internal temperature data of the plurality of partial concrete, the curing temperature control device, among the plurality of surface temperature measurement regions, The measured surface comprising water spraying means for spraying curing water from a nozzle to spray only the internal space of the grid-shaped partial ribs surrounding the selected surface temperature measurement region, and water temperature adjusting means for adjusting the temperature of the curing water. Temperature stress of the whole area of the concrete during curing obtained from temperature distribution data and the measured internal temperature distribution data Is higher than a preset reference concrete temperature stress value, only in the internal space of the grid-shaped partial ribs surrounding the selected surface temperature region corresponding to the partial concrete higher than the reference concrete temperature stress. It is a curing management system for a concrete structure in which the curing water whose water temperature is adjusted by the water temperature adjusting means is sprayed from the spray nozzle of the water spraying means so that the temperature stress of the partial concrete is reduced.

According to the first aspect of the present invention, the surface of the mold form curing the concrete or the surface temperature measurement surface that is the surface of the concrete mold curing side is a plurality of square cell-like surfaces. The temperature is divided into temperature measurement areas, one surface temperature sensor is fixed at the center position of each surface temperature measurement area, and one internal temperature sensor is embedded at the center position of each partial concrete.
Next, surface temperature data of a plurality of surface temperature measurement regions obtained from measurement signals from a plurality of surface temperature sensors, and internal temperature data of a plurality of partial concrete obtained from measurement signals from a plurality of internal temperature sensors Are respectively input to the first communication calculation terminal, and then transmitted to the second communication calculation terminal of the curing temperature management station away from the site using the communication line network. In the second communication operation terminal, the measured surface temperature distribution data is obtained from the surface temperature data of the plurality of surface temperature measurement regions by the temperature distribution data analysis means, and the measured internal temperature distribution data is obtained from the internal temperature data of the plurality of partial concretes. .

Then, the temperature stress of the entire area of the concrete being cured is calculated from the measured surface temperature distribution data and the measured internal temperature distribution data, and the obtained temperature stress value of the entire area of the concrete is calculated as the corresponding age during the curing period. If the temperature of the reference concrete temperature stress that is the control target for the day is larger than the allowable range, the curing water whose water temperature has been adjusted by the water temperature adjusting means so that the value will be reduced is applied to the temperature stress from the spray nozzle of the water blowing means. Spray only the internal space of the mesh-shaped partial ribs that surround the surface temperature measurement area corresponding to the large partial concrete. The sprayed curing water exchanges heat with the corresponding partial concrete via the mold part of the selected surface temperature measurement region, and the temperature stress of the partial concrete during curing, and consequently the temperature stress of the entire concrete during curing. Make it smaller.
This makes it possible to analyze the curing temperature distribution of the concrete at a curing temperature management station away from the site, and to grasp the curing temperature of the concrete with high accuracy, even if the temperature manager is not always on site. Based on the analysis result, the curing temperature can be managed with high accuracy to cure the concrete structure.

As the concrete structure, for example, a breakwater or a caisson as a foundation of a bridge can be employed. Of these, the present invention is intended for construction on site (on-site casting method).
As a formwork material, a metal formwork such as iron, steel, and aluminum alloy can be employed. In addition, wood, precast concrete, etc. may be used.
Each grid-like reinforcing rib connects a plurality of grid-shaped partial ribs that partition (partition) the surface of the formwork so as to surround a plurality of surface temperature measurement regions, respectively, in a matrix shape (grid shape) in the vertical and horizontal directions. This is a (combined) frame member. Each grid-shaped partial rib is formed by connecting two vertical partial ribs and two horizontal partial ribs in a square shape. Therefore, each adjacent grid-shaped partial rib can also serve as a vertical partial rib or a horizontal partial rib arranged on the adjacent side. Therefore, the grid-shaped reinforcing ribs are provided by separating a plurality of long vertical ribs and a plurality of long horizontal ribs at predetermined pitches in the vertical direction and the horizontal direction, and combining them in a grid pattern. be able to.
The curing temperature measuring device measures the temperature of the surface of the mold during curing or the surface temperature measurement surface that is the surface of the concrete during curing.
The curing temperature control device controls the curing temperature of concrete based on the surface temperature data of the surface temperature measurement surface measured by the curing temperature measurement device and the internal temperature data of the concrete being cured.

The surface temperature sensor may be of a type that is always fixed to the surface temperature measurement surface, or of a type that contacts the surface temperature measurement surface only during temperature measurement. Specifically, for example, “Thermocron G type” and “Super Thermocron” manufactured by KN Laboratories Co., Ltd., and Kyowa Denki Co., Ltd. thermometer “BT-100B” can be employed. The surface temperature sensor may be a wired type or a wireless type (wireless type). The internal temperature sensor may be the same as the surface temperature sensor.
The surface whose temperature is measured by the surface temperature sensor may be the surface of the mold that is curing concrete, or the surface of the concrete that is being cured. However, the surface on the mold side of the concrete being cured is preferable because the temperature of the concrete can be directly measured. The reason why each surface temperature sensor is arranged at the center position of the corresponding surface temperature measurement region is to accurately obtain the average temperature of the surface to be measured using a plurality of surface temperature sensors.

Here, the “surface temperature measurement region” is a virtual region partitioned into a surface (surface temperature measurement surface) whose temperature is measured by the surface temperature sensor.
The size of each surface temperature measurement region (the size of each grid-shaped partial rib) is not limited. For example, if the concrete structure is a large caissons, vertical and horizontal (one side) is 2.5M～3.0M, i.e. may be a square-shaped section plane square area ^{6m 2 ~9m} 2. In this case, if the area of each surface temperature measurement region is less than 6 m ² , the temperature control costs more than necessary. Further, if the area of each surface temperature measurement region exceeds 9 m ² , sufficient temperature control management cannot be performed.
The “partial concrete” here is a block obtained by virtually dividing the concrete under curing for each surface temperature measurement region.

Each internal temperature sensor is respectively arranged at the center position of the corresponding partial concrete (for example, when the partial concrete is a cube, the middle point of the line segment connecting the centers of the surfaces of the cube facing each other). The surface (rectangular surface) on the mold side of each partial concrete and the corresponding surface temperature measurement region are the same square surfaces that directly face each other or face each other through the mold. Therefore, the surface temperature sensor arranged at the center position of the surface temperature measurement region and the internal temperature sensor arranged at the center position of the corresponding partial concrete are viewed from the thickness direction of the concrete being cured through the concrete. (Opposite each other).
As the communication network, for example, the Internet can be employed.
As the first communication calculation terminal and the second communication calculation terminal, for example, various mobile terminals including a smartphone having a function of a personal computer and a portable computer can be adopted.
As the curing temperature management station, for example, a concrete structure construction company, its construction management company, each facility (one room) such as a supervisory government office, a server, or the like can be employed.

As the temperature distribution data analysis means, for example, it is mounted on the first communication calculation terminal or the second communication calculation terminal and obtains the measured surface temperature distribution data from the surface temperature data of a plurality of surface temperature measurement regions, Software (application) for obtaining measured internal temperature distribution data from internal temperature data of partial concrete can be employed.
The “measured surface temperature distribution data” here means temperature distribution data of the surface temperature measurement surface created from the surface temperature data of each surface temperature measurement region at the time of temperature measurement (temperature measurement) of the surface temperature measurement surface. .
The “measured internal temperature distribution data” here refers to temperature distribution data of the entire center portion of the concrete under curing obtained from each internal temperature data at the time of measuring the internal temperature of each partial concrete during the curing. .
A water spraying means sprays the curing water stored, for example in the water tank from a spray nozzle with a pump (pump).
As the curing water, for example, tap water, water such as rivers and lakes, desalinated seawater, and the like can be used.
Although the amount of curing water sprayed is not limited, for example, the amount sprayed on the surface temperature measurement region of 3 m × 3 m in length and width (one side) is 2 to 5 liters / minute. If it is less than 2 liters / minute, when curing water is sprayed on the center position of the selected surface temperature measurement region, the temperature of the entire surface temperature measurement region cannot be evenly adjusted with the sprayed curing water. Moreover, if it exceeds 5 liters / minute, the usage-amount of curing water will increase unnecessarily and there exists a possibility that a part of curing water may be sprayed over a surrounding surface temperature measurement area | region over a grid-shaped partial rib.
The water temperature adjusting means is, for example, a means for heating and cooling water at 15 ° C. to 25 ° C. using various heat exchangers, various heaters, etc., and for example, a water heating / cooling device can be adopted. .

The term “temperature stress of the entire area of the concrete being cured” as used herein refers to the measured surface temperature distribution of the surface temperature measurement surface obtained from the (surface) temperature data of the plurality of surface temperature measurement regions in the entire area of the concrete being cured. It means the temperature stress generated by the temperature difference between the data and the measured internal temperature distribution data in the central zone of the concrete determined from the (internal) temperature data of a plurality of partial concretes.
If the temperature stress increases even in a part of the concrete being cured, local cracks occur in the concrete. Therefore, when the measured concrete temperature stress is higher than the preset reference concrete temperature stress value, the temperature stress of the partial concrete is reduced only in the surface temperature measurement region covering the partial concrete where the temperature stress is increased. The curing water whose water temperature is adjusted in this way is sprayed from the spray nozzle of the water spraying means. More specifically, the measured concrete temperature stress data is obtained from the measured surface temperature distribution data and the measured internal temperature distribution data, and this measured concrete temperature stress data is used as a reference concrete temperature stress as a control target for the relevant age day during the curing period. By spraying the curing water whose water temperature has been adjusted by the water temperature adjusting means so as to approach the data value, from the spray nozzle of the water spraying means only to the internal space of the rib-shaped partial ribs surrounding the selected surface temperature measurement area This means that the temperature stress of the partial concrete having a higher temperature stress than the reference concrete temperature stress is lowered. When the curing water is sprayed, the selected surface temperature measurement region is surrounded by the grid-shaped partial ribs, so that the sprayed curing water is less likely to scatter to the adjacent surface temperature measurement region.
The term “corresponding age day during the curing period” as used herein refers to the day when the surface temperature measurement surface is actually measured (the day when the internal temperature of the concrete is measured) during the concrete curing period. This is the day on which the date is set.

  According to a second aspect of the present invention, the plurality of grid-shaped partial ribs are formed by connecting two vertical partial ribs and two horizontal partial ribs in a square shape, and the plurality of grid-shaped partial ribs. 2. The curing structure management system for a concrete structure according to claim 1, wherein all the two lateral partial ribs have the same width over the entire length and are inclined downward toward the front.

  According to the second aspect of the present invention, since all of the lateral partial ribs of the respective grid-shaped partial ribs have the same width over the entire length and are inclined downward toward the front, the selected surface temperature measurement is performed. Curing water sprayed on the internal space of the grid-shaped partial ribs that surround the area exchanges heat with the corresponding partial concrete through the mold part of the selected surface temperature measurement area, and then the surface temperature measurement area. Then, it flows down the mold part, and then slides down to the outside of the mold part by using the lower lateral rib inclined downward of the grid-shaped part rib as a chute. As a result, the formwork in the lower surface temperature measurement region where the curing water is transferred from the front edge of the lower horizontal rib to the lower surface, which is a problem when a horizontal rib orthogonal to the surface of the general formwork is adopted. There is little possibility of flowing into the part.

  The inclination angle of the lateral partial rib is 10 ° to 50 °. If it is less than 10 ° and exceeds 50 °, the curing water that slides down the lateral partial ribs on the lower side of each square-shaped partial rib falls near the formwork and bounces off the ground, and the curing water is applied to the surface of the lower end of the formwork. There is a risk of adhesion. In particular, the preferable inclination angle of the lateral partial rib is 30 ° to 45 °.

  According to the first aspect of the present invention, the surface of the mold form curing the concrete or the surface temperature measurement surface that is the surface of the concrete mold curing side is a plurality of square cell-like surfaces. It is divided into temperature measurement areas, one surface temperature sensor is fixed at the center position of each surface temperature measurement area, and one internal temperature sensor is embedded at the center position of each partial concrete. In addition, the surface temperature data of the plurality of surface temperature measurement regions obtained from the measurement signals from the plurality of surface temperature sensors and the internal temperature data of the plurality of partial concrete obtained from the measurement signals from the plurality of internal temperature sensors. , Respectively, input to the first communication calculation terminal, and then transmitted to the second communication calculation terminal of the curing temperature management station away from the site using the communication line network, and then the second communication calculation terminal In this case, the measured surface temperature distribution data is obtained from the surface temperature data of the plurality of surface temperature measurement regions by the temperature distribution data analyzing means, and the measured internal temperature distribution data is obtained from the internal temperature data of the plurality of partial concretes.

Since it was configured in this way, after that, in the curing temperature management station, the temperature stress of the entire area of the concrete being cured was calculated from the measured surface temperature distribution data and the measured internal temperature distribution data, and the measured temperature stress value obtained was If the temperature is larger than the allowable range of the standard temperature stress value of the concrete, which is the control target of the relevant age during the curing period, spray the curing water whose water temperature is adjusted by the water temperature adjusting means so that the value becomes smaller. From the spray nozzle of the means, the spray is applied only to the internal space of the grid-shaped partial rib corresponding to the selected partial concrete having a large temperature stress. The sprayed curing water exchanges heat with the corresponding partial concrete via the mold part of the selected surface temperature measurement region, and the temperature stress of the partial concrete during curing, and consequently the temperature stress of the entire concrete during curing. Make it smaller.
As a result, even if the temperature manager is not always on site, the curing temperature distribution of the concrete can be analyzed at the curing temperature management station away from the site, and the curing temperature of the concrete can be grasped with high accuracy. Based on the analysis result, the curing temperature can be managed with high accuracy to cure the concrete structure.

  In particular, according to the invention described in claim 2, since all of the lateral partial ribs of each of the grid-shaped partial ribs have the same width over the entire length and are inclined downward toward the front, the selected surface temperature measurement is performed. Curing water sprayed on the internal space of the grid-shaped partial ribs that surround the area exchanges heat with the corresponding partial concrete through the mold part of the selected surface temperature measurement area, and then the surface temperature measurement area. Then, it flows down the mold part, and then slides down to the outside of the mold part by using the lower lateral rib inclined downward of the grid-shaped part rib as a chute. As a result, the formwork in the lower surface temperature measurement region where the curing water is transferred from the front edge of the lower horizontal rib to the lower surface, which is a problem when a horizontal rib orthogonal to the surface of the general formwork is adopted. There is little possibility of flowing into the part.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view including the partial cross section figure which shows the whole structure of the curing management system of the concrete structure based on Example 1 of this invention. It is a perspective view including the partial cross section figure which shows the alignment operation | work of the internal temperature sensor and surface temperature sensor which are used for the curing management system of the concrete structure based on Example 1 of this invention. It is a principal part expansion perspective view which shows the concrete curing temperature adjustment operation state by the curing temperature control apparatus in the curing management system of the concrete structure concerning Example 1 of this invention. It is a principal part expanded sectional view which shows the outward discharge | emission state of curing water using the horizontal partial rib of the formwork used for the curing management system of the concrete structure concerning Example 1 of this invention. It is a principal part block diagram of the curing management system of the concrete structure which concerns on Example 1 of this invention.

  Examples of the present invention will be specifically described below. Here, a breakwater caisson is taken as an example.

In FIG. 1, reference numeral 10 denotes a concrete structure curing management system (hereinafter referred to as a curing management system) according to Embodiment 1 of the present invention. This curing management system 10 includes a revetment caisson (concrete structure) 11 on site. At the time of construction, a curing temperature measuring device 15 that measures the curing temperature of the concrete 14 poured between the inner mold 12 and the outer mold 13, and the curing temperature measured by the curing temperature measuring device 15. A curing temperature control device 16 that controls the curing temperature of the concrete 14 is provided.
Hereinafter, these components will be specifically described.
The caisson 11 for revetment is composed of a base portion 17 that serves as a base, and a peripheral side wall portion 18 that is arranged on the upper portion of the base portion 17 and that is composed of four rectangular box-shaped side walls. When the caisson 11 is placed, between the inner mold 12 disposed inside (inner space side) of the caisson 11 and the outer mold 13 disposed outside caisson 11, concrete ( Normal Portland ready-mixed concrete) 14 is poured, and then the concrete 14 is cured under predetermined conditions for a predetermined period.

As shown in FIGS. 1 to 4, four inner molds 12 for driving each side wall are provided on the outer periphery and the inner periphery of the peripheral side wall portion 18 to be driven in the field. And four outer molds 13 are each assembled with a placement space on the side wall. Both the inner mold 12 and the outer mold 13 are made of iron plates, and the surfaces (outer surfaces) of the respective molds 12 and 13 are surface temperature measurement surfaces, and are squares of 3 m in length and width (surface area 9 m ² ). Are divided into a plurality of surface temperature measurement regions 19 having a grid shape. In addition, the entire surface of each mold 12, 13 has a structure in which a plurality of grid-shaped partial ribs 20 that divide the surface of the corresponding mold 12, 13 are connected vertically and horizontally in accordance with each surface temperature measurement region 19. Grid-like reinforcing ribs 21 are formed. Thereby, the concrete 14 under curing is divided into a plurality of partial concretes 14 </ b> A according to the plurality of surface temperature measurement regions 19. Each grid-shaped partial rib 20 is formed by connecting two vertical partial ribs 22 and two horizontal partial ribs 23 in a square shape. Of these, all the lateral partial ribs 23 have the same width over the entire length and are inclined downward by 45 ° toward the front (FIG. 4). Each grid-like reinforcing rib 21 integrally connects a plurality of long vertical ribs integrally connecting adjacent vertical portion ribs 22 and adjacent horizontal partial ribs 23. A plurality of long horizontal ribs are separated from each other at a predetermined pitch in the vertical direction and the horizontal direction, and these are combined in a lattice shape.

Further, when the caisson 11 is placed, a work frame 24 having a rectangular frame shape is assembled in a plan view with a predetermined distance from both molds 12 and 13 (FIG. 1). Although not shown, another scaffold having a rectangular shape in a plan view is assembled in the internal space of the caisson 11 with a predetermined distance from the inner mold 12.
In each scaffold 24, a plurality of curing water spray nozzles 26, which will be described later, are fixed to portions facing each surface temperature sensor 25 disposed at the center position of each surface temperature measurement region 19.
In addition, near the site scaffold 24, there are a storage tank 27 for the curing water, a water supply pipe 29 for pumping the curing water in the storage tank 27 to each spray nozzle 26 by operating the switching valve 28, and a middle of the water supply pipe 29. A water sprayer (water spraying means) 31 having a pressure feed pump 30 provided on the water supply pipe and a water temperature regulator (water temperature adjusting means) 32 provided in the middle of the water supply pipe 29 for adjusting the temperature of the curing water are disposed. Has been. Specifically, for each placement lot of concrete 14 (here, the fourth lot), the temperature of the curing water is appropriately adjusted in the range of 15 ° C. to 25 ° C. by the water temperature adjuster 32, and the temperature adjusted curing is performed. Water is sprayed at 3 liters / minute with a water sprayer 31. When the temperature stress value of the entire area of the actually measured concrete 14 is larger than the allowable range of the value of the reference concrete temperature stress that becomes the control target of the relevant age day during the curing period, the water temperature adjuster 32 has the value. The temperature of the curing water is adjusted with a built-in heat exchanger so that it becomes smaller. The curing temperature control device 16 is composed of a water sprayer 31 having the water storage tank 27, the water absorption pipe 28, the spray nozzle 26 and the pressure feed pump 30, and a water temperature adjuster 32.

Next, the curing temperature measuring device 15 will be described in detail with reference to FIG. 1, FIG. 2, and FIG.
As shown in FIG. 1, FIG. 2 and FIG. 5, the curing temperature measuring device 15 includes a plurality of surface temperature sensors 25 fixed one by one at the center positions of the plurality of surface temperature measuring regions 19, and a plurality of partial concretes 14A. A plurality of internal temperature sensors 33 embedded one by one so as to face the corresponding surface temperature sensors 25 through the concrete 14 and the measurement signals from the plurality of surface temperature sensors 25 are obtained. The surface temperature data of the plurality of surface temperature measurement areas 19 and the internal temperature data of the plurality of partial concretes 14A obtained from the measurement signals from the plurality of internal temperature sensors 33 are utilized using the Internet 34 which is a kind of communication network. , A first personal computer (first communication operation terminal) 35 that transmits from the site, and a construction company management room (curing temperature management step) that is remote from the site. 2), and receives the surface temperature data of the plurality of surface temperature measurement areas 19 and the internal temperature data of the plurality of partial concretes 14A transmitted from the first personal computer 35 using the Internet 34, respectively. It is provided in the personal computer (second communication computing terminal) 36 and the second personal computer 36, and obtains the measured surface temperature distribution data from the surface temperature data of the plurality of surface temperature measurement regions 19, and the internal temperature of the plurality of partial concrete 14A. Temperature distribution data analysis means 37 for obtaining actually measured internal temperature distribution data from the data.

One terminal insertion hole 19a is formed at the center position of each surface temperature measuring region 19, and a copper temperature measuring element 25a in contact with the temperature measuring surface of the corresponding surface temperature sensor 25 has a tip of the concrete 14 being cured. The surface on the mold side (substantially surface temperature measurement surface) is inserted in contact with the surface (substantially surface temperature measurement region) on the mold side of the partial concrete 14A divided into a plurality of parts. As surface temperature sensor 25, KN Laboratories Co., Ltd. “Thermocron G type” is adopted, and as internal temperature sensor 33, a thermometer “BT-100B” of Kyowa Dengyo Co., Ltd. is mainly used. Yes. Each surface temperature sensor 25 is connected to a wireless data transmitter (not shown) provided on the scaffold 24 by wire, and each surface temperature data is communicated to the first personal computer 35 from there.
Further, the concrete 14 under curing is formed by arranging a plurality of partial concretes 14 </ b> A in a grid shape vertically and horizontally in accordance with the arrangement of the corresponding surface temperature measurement regions 19. Each partial concrete 14 </ b> A is a rectangular parallelepiped composed of a rectangular surface whose front and back surfaces are square and whose peripheral side surface is shorter in length in the thickness direction than the length of one side of the front and back surfaces. Accordingly, the corresponding surface temperature sensor 25 and internal temperature sensor 33 are opposed to each other with the concrete 14 interposed therebetween, as viewed from the thickness direction of the concrete 14 being cured.

Here, with reference to FIG. 2, a method of easily fixing each internal temperature sensor 33 at a position facing the corresponding surface temperature sensor 25 in each partial concrete 14 </ b> A will be described.
When installing the mold, a plurality of intermediate points b of a plurality of parallel straight lines (line segments) a connecting the intermediate points of the uppermost horizontal partial ribs 23 formed on the molds 12 and 13 on the front and back sides are formed. As an insertion position of the internal sensor fixing tube 38, a plurality of rod-shaped molds (not shown) are set up vertically. Thereafter, the ready-mixed concrete 14 is poured into the upper edges of the two molds 12 and 13, and each of the rod-shaped molds is pulled out at a stage where the poured concrete 14 is solidified to such an extent that it does not easily lose its shape. 38 insertion holes 14a are formed. The diameter of the insertion hole 14 a is slightly larger than that of the internal sensor fixing tube 38.
Each internal sensor fixing tube 38 is a metal round tube, and a plurality of internal temperature sensors 33 are fixed at a pitch P in the length direction. This pitch P is the same as the pitch P between the surface temperature sensors 25 in each vertical (height) row among the plurality of surface temperature sensors 25 arranged in a lattice pattern on the surfaces of both molds 12 and 13. The length of each internal sensor fixing tube 38 is slightly longer than the height of the molds 12 and 13. In addition, on the outer peripheral surface of the upper end portion of each internal sensor fixed pipe 38, the height position of each internal temperature sensor 33 is located above the uppermost internal temperature sensor 33 by a half pitch 1 / 2P of the internal temperature sensor 33. An annular sensor positioning line 38a to be determined is formed.

Next, each internal sensor fixing tube 38 is vertically inserted into each insertion hole 14a. At this time, each internal sensor fixed pipe 38 passes through the center position of each corresponding partial concrete 14A in its corresponding column, and its upper end is disposed above the upper surface of the concrete 14 being cured. Thereafter, each sensor positioning line 38 a is aligned with the upper surface of the concrete 14 being cured, and each internal sensor fixing tube 38 is fixed to both molds 12 and 13. Thereby, each internal temperature sensor 33 is arrange | positioned in the center position of 14 A of corresponding partial concrete. The reason is that each internal temperature sensor 33 is fixed at the same pitch as the surface temperature sensor 25 (pitch P between the center positions of the partial concrete 14A) in the length direction of the corresponding internal sensor fixing pipe 38, This is because the sensor positioning line 38a is disposed above the uppermost internal temperature sensor 33 by a half pitch 1 / 2P.
Each of the internal temperature sensors 33 fixed to the internal sensor fixing tube 38 is arranged in the radial direction of the internal sensor fixing tube 38 so that the temperature measuring element 33a is always in contact with the inner peripheral surface of the insertion hole 14a. It is always pressed by a spring material (not shown) incorporated toward the outside. Therefore, the temperature of the central portion of each partial concrete 14A can be measured with high accuracy by the corresponding internal temperature sensor 33. Further, the temperature measurement signal from each internal temperature sensor 33 is drawn out from the tube opening at the upper end of each through the internal space of the corresponding internal sensor fixed pipe 38 and wired to the first personal computer 35. It is connected via a LAN cable (may be a wireless LAN).

Next, with reference to FIG. 5, the 1st personal computer 35 arrange | positioned on the spot and the 2nd personal computer 36 provided in the management room of the construction company away from the spot are demonstrated in detail.
As shown in FIG. 5, the first personal computer 35 uses the communication unit 42 for connection to the Internet 34 and the selected spray nozzle 26 only for the CPU 41 as the arithmetic processing unit, and the cured water in the water tank 27. A pressure feed pump 30 for feeding the pressure, a switching valve 28 for switching the pressure feed path of the curing water according to the selected spray nozzle 26, each surface temperature sensor 25, each internal temperature sensor 33, and the temperature of the curing water being pumped. The water temperature adjuster 32 for adjusting the temperature by heat exchange with the temperature adjusting medium and the timer 43 are electrically connected to each other.

  The second personal computer 36 includes a communication unit 42A for connecting to the Internet 34, a temperature distribution data analysis means 37 that is software for analyzing the measured surface temperature distribution data and the measured internal temperature distribution data, and the CPU 41A. Based on the measured surface temperature distribution data and the measured internal temperature distribution data, the measured concrete temperature stress calculating means 44, which is software for obtaining the measured concrete temperature stress that is the temperature stress of the entire area of the concrete 14 being cured, is set in advance. In the storage unit 45 in which the reference concrete temperature stress is stored, and in all the partial concretes 14A, the temperature stress difference calculating means 46 which is software for obtaining the difference between the measured concrete temperature stress and the reference concrete temperature stress, and the measured concrete temperature stress Is the reference concrete temperature stress In order to reduce the temperature stress difference obtained by the temperature control concrete selection means 47 and the temperature stress difference calculation means 46 which are software for selecting the higher partial concrete 14A, the adjustment temperature of the curing water by the water temperature adjuster 32, Spray condition determining means 48, which is software for determining the time for spraying the curing water to the selected surface temperature measurement region 19, is electrically connected to each other.

Next, referring to FIGS. 1 to 5, when the caisson 11 for revetment is constructed on site, the curing temperature of the concrete 14 poured into both molds 12, 13 is measured using the Internet 34 and the curing temperature measuring device. 15 is remotely controlled in the management room of the construction company, and the selected curing portion of the concrete 14 under curing is operated by operating the curing temperature controller 16 at the site via the Internet 34 as necessary. A method of controlling the curing temperature of the concrete 14 by spraying the curing water adjusted to an appropriate temperature only on the concrete 14A will be described.
As shown in FIG. 1, the temperature of the center part of the several area | region (substantially surface temperature measurement area | region) which divided the surface of each partial concrete 14A according to the surface temperature measurement area | region 19 after concrete placement is shown. The surface temperature sensors 25 detect the surface temperature data, and the surface temperature data is wirelessly input to the first personal computer 35 via the wireless data transmitter provided in the scaffold 24. Moreover, the temperature of the center part of each partial concrete 14A which divided the concrete 14 under curing is each detected by each temperature internal temperature sensor 33, and those internal temperature data are input into the 1st personal computer 35 with a wire communication.
Thereafter, the surface temperature data and the internal temperature data of the obtained partial concrete 14A are transferred to the second personal computer 36 in the management room of the construction company of the caisson 11 away from the site using both the communication units 42 and the Internet 34. Each is sent. In the management room, the second personal computer 36 analyzes the measured surface temperature distribution data in the entire area on the mold side of the concrete 14 being cured from the plurality of surface temperature data by the temperature distribution data analysis means 37, and From the internal temperature data of the partial concrete 14A, the measured internal temperature distribution data of the center temperature over the entire area of the concrete 14 being cured is analyzed.

Thereafter, in the management room, the measured temperature stress distribution data of the entire area of the concrete 14 being cured is measured from the measured surface temperature distribution data and the measured internal temperature distribution data, and the measured concrete temperature stress calculation means mainly using general temperature stress calculation software. 44 is used for calculation. Specifically, the temperature stress of each partial concrete 14A is obtained from the surface temperature data and the internal temperature data of each partial concrete 14A, and the temperature stress distribution data of the entire area of the concrete 14 being cured is obtained therefrom. Next, the measured temperature stress (measured temperature stress distribution data) obtained by the temperature stress difference calculating means 46, and the control target of the relevant material age day in the curing period stored in the storage unit 45 in advance. A difference from the value of the reference temperature stress (reference temperature stress distribution data of the entire concrete area) of the concrete 14 is obtained.
Here, if the difference is larger than the allowable range of the reference temperature stress, the temperature control concrete selecting means 47 selects the partial concrete 14A in which the temperature stress exceeding the allowable range is generated and the spray nozzle 26 for spraying the curing water on the partial concrete 14A. At the same time, the temperature and spraying time of the curing water are determined by the spraying condition determining means 48 so that the difference is reduced. Thereafter, the obtained spraying condition data is transmitted from the second personal computer 36 in the management room to the first personal computer 35 in the field using both communication units 42 and the Internet 34.

In the first personal computer 35, a curing water temperature adjustment command is sent from the CPU 41 to the water temperature adjuster 32 based on the curing condition spraying condition data obtained by the spraying condition determining means 48 to the water temperature adjuster 32, and the timer 43. A command for the spraying time controlled by is sent to the water sprayer 31. Thus, the curing water whose water temperature is adjusted by the water temperature adjuster 32 is sprayed from the spray nozzle 26 of the selected water sprayer 31 only to the internal space of the mesh-shaped partial rib 20 surrounding the partial concrete 14A having a large temperature stress. (Figure 3). The sprayed curing water exchanges heat with the corresponding partial concrete 14A through the selected mold portion of the surface temperature measurement region 19, and the temperature stress of the partial concrete 14A being cured, and consequently the concrete 14 being cured. Reduce overall temperature stress.
As a result, even if the temperature manager is not always present at the site, the curing temperature distribution of the concrete 14 can be analyzed and the curing temperature of the concrete 14 can be grasped with high accuracy in the management room of the construction company away from the site. In addition, the caisson 11 can be cured by controlling the curing temperature with high accuracy based on the analysis result.

  In addition, since all of the horizontal partial ribs 23 of each of the grid-shaped partial ribs 20 have the same width over the entire length and are inclined downward toward the front, the grid-shaped partial ribs 20 that indirectly surround the selected surface temperature measurement region 19. The curing water sprayed on the interior space of the heat exchanger exchanges heat with the corresponding partial concrete 14A through the selected mold part of the surface temperature measurement region 19, and then the mold part of the surface temperature measurement region 19 is After flowing down, the lower horizontal partial rib 23 inclined downward of the grid-shaped partial rib 20 is used as a chute to slide out of the mold (FIG. 4). Thereby, the curing water was a problem in the case of adopting a horizontal rib perpendicular to the surface of the general formwork, and the curing water was transferred from the front edge of the lower horizontal rib to the lower surface of the lower surface temperature measurement region 19. There is little risk of flowing into the formwork.

  This invention is useful as a technology for remote curing management of concrete structures such as caissons that are installed on site, and in addition to caisson, it is also applied to remote curing management of bridge piers, superstructures, L-shaped blocks, blocks, etc. The

10 Curing management system for concrete structures,
11 Caisson (concrete structure),
12 Inside formwork,
13 Outer formwork,
14 Concrete,
14A Partial concrete,
15 Curing temperature measuring device,
16 Curing temperature control device,
19 Surface temperature measurement area,
20 grid-shaped partial ribs,
21 lattice reinforcing ribs,
22 vertical part ribs,
23 side ribs,
25 Surface temperature sensor,
26 spray nozzle,
31 Water sprayer (water spray means),
32 Water temperature adjuster (water temperature adjusting means),
33 Internal temperature sensor,
34 Internet (communication network),
35 first personal computer (first communication operation terminal),
36 second personal computer (second communication operation terminal),
37 Temperature distribution data analysis means.

Claims (2)

When the concrete structure is constructed on site, the curing temperature measuring device for measuring the curing temperature of the concrete poured into the formwork, and the curing temperature of the concrete based on the curing temperature measured by the curing temperature measuring device. A curing management system for a concrete structure having a curing temperature control device to control,
Any one of the surface of the mold during curing and the surface of the concrete during mold curing is a surface temperature measurement surface divided into a plurality of square cell-shaped surface temperature measurement regions,
On the surface of the mold, lattice-shaped reinforcing ribs are formed in which a plurality of grid-shaped partial ribs that divide the surface of the mold in accordance with the plurality of surface temperature measurement regions are vertically and horizontally connected.
The concrete being cured is divided into a plurality of partial concretes according to the plurality of surface temperature measurement regions,
The curing temperature measuring device is:
A plurality of surface temperature sensors fixed to a center position of the plurality of surface temperature measurement regions;
A plurality of internal temperature sensors embedded at the center positions of the plurality of partial concretes to face the corresponding surface temperature sensors via the concrete;
The surface temperature data of the plurality of surface temperature measurement regions obtained from the measurement signals from the plurality of surface temperature sensors and the internal temperature data of the plurality of partial concrete obtained from the measurement signals from the plurality of internal temperature sensors. A first communication operation terminal that transmits from the site using a communication line network;
Surface temperature data of the plurality of surface temperature measurement regions and the plurality of partial concretes provided in the curing temperature management station remote from the site and transmitted from the first communication calculation terminal using the communication line network A second communication operation terminal that respectively receives the internal temperature data of
The temperature which is provided in the second communication calculation terminal and obtains the measured surface temperature distribution data from the surface temperature data of the plurality of surface temperature measurement regions and obtains the measured internal temperature distribution data from the internal temperature data of the plurality of partial concretes Distribution data analysis means,
The curing temperature control device is:
Water spraying means for spraying curing water from a spray nozzle only on the internal space of the grid-shaped partial rib that surrounds the selected surface temperature measurement region among the plurality of surface temperature measurement regions,
Water temperature adjusting means for adjusting the temperature of the curing water,
When the temperature stress of the entire area of the concrete being cured obtained from the measured surface temperature distribution data and the measured internal temperature distribution data is higher than a preset reference concrete temperature stress value, than the reference concrete temperature stress The curing in which the water temperature is adjusted by the water temperature adjusting means so that the temperature stress of the partial concrete is reduced only in the internal space of the grid-shaped partial ribs surrounding the selected surface temperature region corresponding to the high partial concrete. A curing management system for a concrete structure in which water is sprayed from a spray nozzle of the water spraying means. The plurality of grid-shaped partial ribs are formed by connecting two vertical partial ribs and two horizontal partial ribs in a square shape,
2. The curing management system for a concrete structure according to claim 1, wherein all of the two lateral partial ribs of the plurality of grid-shaped partial ribs have the same width over the entire length and are inclined downward toward the front.

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