JP7460932B2 - Decision devices, decision systems, and decision methods - Google Patents

Description

The present invention relates to a decision device, a decision system, and a decision method.

There are several deterioration phenomena of reinforced concrete, one of which is carbonation. Neutralization is a phenomenon in which concrete, which was alkaline at the time of placement, gradually becomes neutral from the surface (the interface between concrete and air) due to carbon dioxide in the atmosphere. The internal reinforcing bars form a passive state in an alkaline environment, so corrosion does not progress, but corrosion progresses in a neutral environment. As a result, the strength of reinforced concrete decreases as the internal reinforcing bars corrode and become thinner due to carbonation.

The rate of carbonation progress in reinforced concrete structures varies depending on the environment, material conditions, etc. (see, for example, Non-Patent Document 1). Therefore, maintenance management can be carried out more efficiently by classifying reinforced concrete structures according to the rate of carbonation progress and assigning appropriate inspection timing and inspection cycles. For example, for reinforced concrete structures where carbonation hardly progresses, the inspection period may be extended from the current period.

Jaedong Zheng, Kazuyoshi Hirai, Hirozo Mitsuhashi, "Experimental study on the effects of temperature and humidity on the carbonation rate of mortar", Journal of Concrete Engineering, Vol. 1, No. 1, 1990.

However, in many cases, the rate of carbonation progression is not reflected in the inspection cycles and timing of reinforced concrete structures. One reason for this is the significant workload required to understand the progress of carbonation. Understanding the carbonation of concrete requires on-site measurement through sample collection or destructive testing, which requires more workload than inspection. This has resulted in problems such as difficulty in efficiently maintaining reinforced concrete structures.

An object of the present disclosure, made in view of such circumstances, is to provide a determination device, a determination system, and a determination method that enable efficient maintenance and management of reinforced concrete structures.

A determining device according to an embodiment includes a determining unit that determines whether or not standing water exists inside a reinforced concrete structure, and determining an inspection cycle of the reinforced concrete structure based on a determination result by the determining unit. A determining section.

The determination system of one embodiment includes a moisture detection sensor that detects whether moisture is present in a water collection area inside a reinforced concrete structure, a judgment unit that determines whether accumulated water is present inside based on information detected by the moisture detection sensor, and a determination unit that determines the inspection period for the reinforced concrete structure based on the judgment result by the judgment unit.

A determining method according to an embodiment includes a step of determining whether or not standing water exists inside the reinforced concrete structure, and determining an inspection cycle of the reinforced concrete structure based on the determination result of the determining step. and a step.

According to the present disclosure, it is possible to provide a decision-making device, decision-making system, and decision-making method that enable efficient maintenance and management of reinforced concrete structures.

FIG. 2 is a diagram showing an example of the configuration of a manhole for which an inspection cycle is determined by the determination device according to the first embodiment. 1 is a block diagram showing an example of the configuration of a determining device according to a first embodiment. FIG. It is a figure showing an example of the difference in the progress of carbonation depending on the presence or absence of accumulated water according to the first embodiment. It is a flow chart which shows an example of the decision method concerning a 1st embodiment. It is a flow chart which shows another example of the decision method concerning a 1st embodiment. It is a block diagram showing an example of composition of a decision system concerning a 2nd embodiment. It is a flow chart which shows an example of the decision method concerning a 2nd embodiment. It is a block diagram showing an example of composition of a decision system concerning a 3rd embodiment. A figure showing an example of the number of years it takes for rebar to become neutralized in a manhole in accordance with the third embodiment. FIG. 7 is a diagram showing an example of a difference in humidity depending on the presence or absence of accumulated water according to the third embodiment. It is a flow chart which shows an example of the decision method concerning a 3rd embodiment. 13 is a flowchart showing another example of the determination method according to the third embodiment. FIG. 13 is a block diagram showing an example of the configuration of a determination system according to a fourth embodiment. 13 is a flowchart illustrating an example of a determination method according to the fourth embodiment. 13 is a flowchart showing an example of a determination method according to a modified example.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. In addition, in principle, the same reference numerals are given to the same components, and redundant explanation will be omitted. In each figure, for convenience of explanation, the vertical and horizontal ratios of each structure are exaggerated from the actual ratios. Furthermore, in the following explanation, "above" means a positive direction on the Z-axis of the coordinate axes shown in the drawing, and "bottom" means a negative direction on the Z-axis of the coordinate axes shown on the drawing. shall mean the direction of However, "upper" and "lower" are merely defined for convenience and should not be construed in a restrictive manner.

<First embodiment>
[Decision device]
An example of the configuration of the determining device according to the first embodiment will be described with reference to FIG. 1A, FIG. 1B, and FIG. 2.

The determining device 100 is a device that determines the inspection cycle of a reinforced concrete structure. An example of the reinforced concrete structure is a manhole 2.

Here, the configuration of the manhole 2 buried underground 302 will be briefly described with reference to FIG. 1A.

The manhole 2 is, for example, a standardized communication manhole. The manhole 2 comprises a neck 210, a body 220, an iron cover 230, etc. The neck 210 is, for example, approximately cylindrical in shape, and the body 220 is, for example, approximately rectangular in shape. The iron cover 230 is approximately cylindrical in shape, and fits into the manhole hole which is the entrance and exit of the manhole 2. The neck 210 and the body 220 are made of reinforced concrete. The body 220 comprises an upper deck 221, a lower deck 222, and a side wall 223.

The interior S of the manhole 2 is surrounded by the ceiling surface R of the upper floor slab 221 in the frame part 220, the wall surface J of the side wall part 223 in the frame part 220, the floor surface F of the lower floor slab 222 in the frame part 220, and the like. A water collection part (recessed part) 224 for collecting water is provided on the floor surface F of the lower slab 222 in the frame part 220. The manhole 2 has a structure in which accumulated water 3 that flows into the interior S of the manhole 2 due to rain or the like is accumulated from this water collection portion 224. Note that once the accumulated water 3 flows into the interior S of the manhole 2, it is difficult to flow out and does not disappear naturally.

Furthermore, with reference to FIG. 2, the relationship between the neutralization of the manhole 2 and the accumulated water 3 will be briefly described. In FIG. 2, the horizontal axis indicates the material age (period after concrete is placed) [year], and the vertical axis indicates the carbonation depth [mm]. Moreover, in FIG. 2, the neutralization depth in the manhole 2 where the accumulated water 3 exists is shown by a black circle, and the neutralization depth in the manhole 2 where the accumulated water 3 does not exist is shown by a white circle.

From Figure 2, it can be seen that the neutralization depth when there is no accumulated water 3 inside the manhole 2 S is greater than the neutralization depth when there is accumulated water 3 inside the manhole 2 S. In other words, it can be seen that when there is no accumulated water 3 inside the manhole 2 S, neutralization progresses, but when there is accumulated water 3 inside the manhole 2 S, neutralization hardly progresses.

Therefore, it is presumed that the rate of neutralization progression in manhole 2 depends on whether or not accumulated water 3 is present inside manhole 2 S, and that the rate of neutralization progression in manhole 2 when accumulated water 3 is not present is faster than the rate of neutralization progression in manhole 2 when accumulated water 3 is present. In other words, it is presumed that determining the presence or absence of accumulated water 3 inside manhole 2 S is appropriate from the perspective of determining the rate of neutralization progression in manhole 2.

The determination device 100 includes an input unit 110, a control unit 120, a storage unit 130, and an output unit 140. The determination device 100 may further include a communication unit.

The input unit 110 accepts input of various information. The input unit 110 may be any device that allows a worker to perform a predetermined operation, such as a microphone, a touch panel, a keyboard, or a mouse. For example, the worker may inspect the inside S of the manhole 2, visually check whether or not there is accumulated water inside the manhole 2, and input accumulated water information indicating whether or not there is accumulated water inside the manhole 2 using the input unit 110. As a result, the accumulated water information is input to the control unit 120. The accumulated water information may be entered by the worker into, for example, Excel (registered trademark), and may be stored in the storage unit 130 in advance as a database. The input unit 110 may be integrated with the determination device 100, or may be provided separately.

The control unit 120 may be configured by dedicated hardware, or may be configured by a general-purpose processor or a processor specialized for specific processing. The control unit 120 includes a determination unit 121 and a determination unit 122.

The determining unit 121 determines whether or not standing water 3 exists in the interior S of the manhole 2 based on the standing water information stored in the storage unit 130 or the standing water information directly input by the operator. . The determination unit 121 then outputs the determination result to the determination unit 122.

For example, when determining that the standing water 3 exists inside the manhole 2 based on the standing water information, the determining unit 121 sends the determination result that the standing water 3 exists inside the manhole 2 to the determining unit 122. Output. For example, when the determining unit 121 determines that the standing water 3 does not exist inside the manhole 2 based on the standing water information, the determining unit 121 determines that the standing water 3 does not exist inside the manhole 2. Output to.

The determination unit 122 determines the inspection period for the manhole 2 based on the judgment result input from the judgment unit 121. The determination unit 122 may further determine the inspection time for the manhole 2 based on the determined inspection period.

For example, based on the judgment result input from the judgment unit 121 that accumulated water 3 is present inside S of the manhole 2, the decision unit 122 decides to extend the inspection period of the manhole 2 from the conventional inspection period.

For example, the determining unit 122 determines that the inspection cycle of the manhole 2 is to be the same as the conventional inspection cycle, based on the determination result inputted from the determination unit 121 that there is no accumulated water 3 inside the manhole 2. do.

When the determining unit 122 determines specifically how many years the inspection period should be, for example, referring to FIG. Although the above is considered to be appropriate, this inspection cycle is only a theoretical value. In fact, when determining the inspection interval, the determining unit 122 takes into account not only the deterioration of the manhole 2 (for example, deterioration due to carbonation) but also the deterioration of the cable and the metal members that support the cable. There is a need. Therefore, it is preferable that the determining unit 122 determines the inspection period by taking into consideration the deterioration data of various members stored in the storage unit 130 in addition to the determination result input from the determining unit 121. Furthermore, in addition to deterioration of various parts, there is also a possibility that the equipment may be destroyed by unexpected external forces, so making the inspection cycle too long poses a risk. For this reason, it is more preferable that the determining unit 122 determines the inspection period while also considering such external forces.

The storage unit 130 includes one or more memories, and may include, for example, semiconductor memory, magnetic memory, optical memory, and the like. Each memory included in the storage unit 130 may function as, for example, a main storage device, an auxiliary storage device, or a cache memory. Each memory does not necessarily need to be provided inside the determining device 100, and may be provided outside the determining device 100.

The storage unit 130 stores any information used in the operation of the determination device 100. For example, the storage unit 130 stores water accumulation information, the determination result determined by the determination unit 121, the inspection period determined by the determination unit 122, the inspection time determined by the determination unit 122, etc. In addition to this, the storage unit 130 stores, for example, various programs and data.

The output unit 140 outputs various information. The output unit 140 is, for example, a liquid crystal display, an organic EL (Electro-Luminescence) display, a speaker, or the like. For example, the output unit 140 displays information such as inspection frequency and inspection timing. The output unit 140 may be integrated with the determination device 100 or may be provided separately.

The determination device 100 according to this embodiment includes a determination unit 121 that determines whether or not accumulated water 3 is present inside the manhole 2 S, and a determination unit 122 that determines the inspection period for the manhole 2 based on the determination result. This makes it possible to determine an appropriate inspection period for each manhole 2 that reflects the neutralization progression rate in each manhole 2, without the need to collect samples or perform on-site measurements using destructive testing. Therefore, a determination device 100 that enables efficient maintenance and management of the manholes 2 can be realized.

[Determination method 1]
Next, an example of a determination method according to the first embodiment will be described with reference to FIG.

In step S101, the determination device 100 determines whether or not there is accumulated water 3 inside the manhole 2, based on accumulated water information that has been previously compiled into a database and stored in the memory unit 130. When the determination device 100 determines that there is accumulated water 3 inside the manhole 2 (step S101→Yes), it performs the process of step S102. When the determination device 100 determines that there is no accumulated water 3 inside the manhole 2 (step S101→No), it performs the process of step S103.

In step S102, the determination device 100 determines that the inspection period for manhole 2 should be extended beyond the conventional inspection period.

In step S103, the determining device 100 determines to make the inspection cycle of the manhole 2 the same as the conventional inspection cycle.

By applying the determination method of this embodiment to determine the inspection period for manhole 2, efficient maintenance and management of manhole 2 is possible.

[Determination method 2]
Next, with reference to FIG. 4, another example of the determination method according to the first embodiment will be described.

In step S201, the operator inspects the inside S of the manhole 2. Then, the operator visually confirms whether or not the accumulated water 3 exists in the interior S of the manhole 2. When the operator confirms that the accumulated water 3 exists inside the manhole 2, the operator performs a predetermined operation via the input unit 110 to confirm that the accumulated water 3 exists inside the manhole 2. The stored water information shown is input to the determination device 100. On the other hand, when the operator confirms that the accumulated water 3 does not exist inside the manhole 2, the operator performs a predetermined operation via the input unit 110 to confirm that the accumulated water 3 does not exist inside the manhole 2. The stored water information indicating this is input to the determination device 100. Note that in most cases, the presence or absence of accumulated water 3 in the interior S of the manhole 2 can be clearly confirmed by visual inspection by an operator.

In step S202, the determining device 100 stores stored water information. The determination device 100 stores updated accumulated water information that is manually input into the determination device 100 by an operator directly performing an inspection at the site, and updated each time the inspection is performed. The updated accumulated water information is information corresponding to changes in the manhole 2 over time. For this reason, it is useful for the determining device 100 to apply updated stored water information, for example, when the stored water 3 suddenly flows into the manhole 2 due to an unexpected accident.

In step S203, the determination device 100 determines whether or not accumulated water 3 is present inside S of the manhole 2 based on the accumulated water information directly input by the operator. When the determination device 100 determines that accumulated water 3 is present inside S of the manhole 2 (step S203 → Yes), it performs processing of step S204. When the determination device 100 determines that accumulated water 3 is not present inside S of the manhole 2 (step S203 → No), it performs processing of step S205.

In step S204, the determining device 100 determines to extend the inspection cycle of the manhole 2 from the conventional inspection cycle.

In step S205, the determining device 100 determines to make the inspection cycle of the manhole 2 the same as the conventional inspection cycle.

In step S206, the determining device 100 further determines the next inspection time based on the determined inspection cycle, and performs the process of step S201 again.

By applying the determination method according to this embodiment to determine the inspection cycle of the manhole 2, efficient maintenance and management of the manhole 2 becomes possible.

<Second embodiment>
[Decision system]
An example of the configuration of the determination system according to the second embodiment will be described with reference to FIG. 5.

The determination system 10 includes a determination device 100 and a moisture detection sensor 200. The determining device 100 includes an input section 110, a control section 120, a storage section 130, an output section 140, and a communication section 150. The determination device 100 and the moisture detection sensor 200 are communicably connected by wire or wirelessly. In addition, in the decision system 10, duplicate explanation may be omitted for the same configuration as the decision device 100 according to the first embodiment.

The moisture detection sensor 200 is provided in the water collection section 224 in the interior S of the manhole 2. By providing the moisture detection sensor 200 in the water collection section 224 where the pooled water 3 is likely to accumulate, moisture detection can be performed with higher accuracy.

The moisture detection sensor 200 detects whether moisture is present in the water collection section 224 inside the manhole 2. The moisture detection sensor 200 then transmits moisture detection information indicating whether moisture is present in the water collection section 224 inside the manhole 2 to the determination device 100.

The determination unit 121 determines whether moisture is present in the water collection section 224 inside the manhole 2 based on the moisture detection information received from the moisture detection sensor 200, and further determines whether accumulated water 3 is present inside the manhole 2. The determination unit 121 then outputs the determination result to the decision unit 122.

For example, when the judgment unit 121 judges based on the moisture detection information that moisture is present in the water collection section 224 inside the manhole 2 S, it further judges that accumulated water 3 is present inside the manhole 2 S, and outputs the judgment result that accumulated water 3 is present inside the manhole 2 S to the decision unit 122.

For example, when determining that there is no moisture in the water collection part 224 in the interior S of the manhole 2 based on the moisture detection information, the determination unit 121 further determines that there is no accumulated water 3 in the interior S of the manhole 2. , outputs the determination result that the accumulated water 3 does not exist in the interior S of the manhole 2 to the determination unit 122.

The determining unit 122 determines the inspection period for the manhole 2 based on the determination result input from the determining unit 121.

The storage unit 130 stores arbitrary information used for the operation of the determination device 100. For example, the storage unit 130 stores the moisture detection information detected by the moisture detection sensor 200, the determination result determined by the determination unit 121, the inspection period determined by the determination unit 122, the inspection timing determined by the determination unit 122, etc. Remember. In addition to this, the storage unit 130 stores, for example, various programs and data.

The communication unit 150 has a function of communicating with the moisture detection sensor 200. The communication unit 150 receives, for example, moisture detection information detected by the moisture detection sensor 200 from the moisture detection sensor 200.

The determination system 10 according to this embodiment includes a determination unit 121 that determines whether or not accumulated water 3 is present inside the manhole 2 S based on moisture detection information detected by the moisture detection sensor 200, and a determination unit 122 that determines the inspection cycle for the manhole 2 based on the determination result. This makes it possible to determine an appropriate inspection cycle for each manhole 2 that reflects the neutralization progression rate in each manhole 2 without the need to collect samples or perform on-site measurements by destructive testing. Therefore, a determination system 10 that enables efficient maintenance and management of the manholes 2 can be realized.

[Determination method]
Next, an example of the determination method according to the second embodiment will be described with reference to FIG. 6.

In step S301, the moisture detection sensor 200 detects whether moisture is present in the water collection section 224 inside the manhole 2. Then, the moisture detection sensor 200 transmits the moisture detection information to the determination device 100.

In step S302, the determination device 100 receives moisture detection information detected by the moisture detection sensor 200 from the moisture detection sensor 200. Then, the determination device 100 stores the received moisture detection information.

In step S303, the determination device 100 determines whether or not moisture is present in the water collection section 224 inside S of the manhole 2 based on the moisture detection information. If the determination device 100 determines that moisture is present in the water collection section 224 inside S of the manhole 2 (step S303 → Yes), it performs processing of step S304. If the determination device 100 determines that moisture is not present in the water collection section 224 inside S of the manhole 2 (step S303 → No), it performs processing of step S305.

In step S304, the determination device 100 determines that the accumulated water 3 is present in the interior S of the manhole 2 because moisture is present in the water collecting portion 224 in the interior S of the manhole 2. Then, the determining device 100 performs the process of step S306.

In step S305, the determination device 100 determines that there is no accumulated water 3 inside the manhole 2 because there is no moisture in the water collection section 224 inside the manhole 2. The determination device 100 then performs the process of step S307.

In step S306, the determining device 100 determines to extend the inspection cycle of the manhole 2 from the conventional inspection cycle.

In step S307, the determination device 100 determines that the inspection period for manhole 2 should be the same as the conventional inspection period.

By applying the determination method according to this embodiment to determine the inspection cycle of the manhole 2, efficient maintenance and management of the manhole 2 becomes possible.

Third Embodiment
Next, an example of the configuration of a determination system according to the third embodiment will be described with reference to FIGS.

The determination system 20 includes a determination device 100 and a hygrometer 300. The determination device 100 includes an input unit 110, a control unit 120, a memory unit 130, an output unit 140, and a communication unit 150. The determination device 100 and the hygrometer 300 are connected to each other so as to be able to communicate with each other via wire or wirelessly. Note that in the determination system 10, duplicated descriptions of the same configuration as the determination device 100 according to the first embodiment may be omitted.

The hygrometer 300 is provided, for example, on the ceiling surface R of the upper floor slab 221 in the interior S of the manhole 2 (see FIG. 1A). The installation position of the hygrometer 300 is not particularly limited as long as it is at a position where there is no possibility of being immersed in the accumulated water 3 when the accumulated water 3 is present inside the manhole 2 S.

The hygrometer 300 measures the humidity inside the manhole 2. Then, the hygrometer 300 transmits humidity measurement information including information on the humidity inside the manhole 2 at a predetermined time, information on changes in humidity inside the manhole 2 over time, etc. to the determination device 100. . For example, FIG. 8 can be referred to for specific values of the humidity measurement information.

The manhole 2 has an entrance and exit closed by an iron cover 230, so the interior S is a semi-sealed environment. Therefore, if there is accumulated water 3 inside the manhole 2, the humidity inside the manhole 2 is always 100% due to the evaporation of water, except immediately after the iron cover 230 is opened and closed (approximately one day). On the other hand, if there is no accumulated water 3 inside the manhole 2, the humidity inside the manhole 2 is not always 100%.

Here, the humidity transition inside the manhole 2 will be briefly explained with reference to Figure 8. In Figure 8, the horizontal axis indicates the date and time [t] when the humidity inside the manhole 2 was measured, and the vertical axis indicates the humidity inside the manhole 2 [%].

From FIG. 8, it can be seen that the humidity when there is no accumulated water 3 inside the manhole 2 fluctuates more over time than the humidity when there is accumulated water 3 inside the manhole 2. I understand.

8 also shows that when there is no accumulated water 3 inside the manhole 2 S, the humidity is rarely 100%, dropping to a minimum of approximately 65%. On the other hand, when there is accumulated water 3 inside the manhole 2 S, the humidity is always 100%. Generally, a humidity of 65% inside the manhole 2 S can be said to be a boundary condition at which the rate of neutralization in the manhole 2 increases, although this will vary depending on other conditions.

That is, Figure 8 suggests that it is possible to determine whether or not accumulated water 3 exists inside the manhole 2 based on the humidity inside the manhole 2. Specifically, it suggests that it is possible to determine whether or not accumulated water 3 exists inside the manhole 2 based on whether or not the humidity inside the manhole 2 is always 100% except immediately after the iron cover 230 of the manhole 2 is opened or closed, and based on whether or not the slope of the humidity versus time for any two days is 0 (zero) by referring to the graph of humidity trends inside the manhole 2 shown in Figure 8.

Furthermore, with reference to FIG. 9, the relationship between the humidity in the interior S of the manhole 2 and the number of years [year] until carbonation reaches the position of the reinforcing bars (25 mm from the surface) in the manhole 2 will be briefly explained. . Note that the number of years [year] shown in FIG. 9 includes a part of the past knowledge referred to in Non-Patent Document 1, in addition to the experimentally calculated value.

From FIG. 9, it can be seen that when the humidity is 90% or higher, neutralization in the manhole 2 does not proceed. Furthermore, it can be seen that as the humidity decreases to 85 [%], 80 [%], and 65 [%], the number of years until the neutralization reaches the position of the reinforcing bars in the manhole 2 becomes shorter. In particular, at a humidity of 65%, it can be seen that although there are slight differences depending on the water-cement ratio, carbonation reaches the position of the reinforcing bars in several decades at the earliest.

Therefore, it is presumed that it is appropriate to determine the presence or absence of accumulated water 3 in the interior S of the manhole 2 based on the humidity measurement information from the viewpoint of determining the rate of progress of carbonation in the manhole 2.

Based on the humidity measurement information received from the hygrometer 300, the determination unit 121 determines whether the humidity inside the manhole 2 is always 100%, except immediately after the iron cover 230 in the manhole 2 is opened and closed. , Furthermore, it is determined whether or not there is accumulated water 3 inside S of the manhole 2 . The determination unit 121 then outputs the determination result to the determination unit 122.

For example, if the determining unit 121 determines that the humidity inside the manhole 2 is always 100%, except immediately after opening and closing the iron cover 230 in the manhole 2, based on the humidity measurement information, the determination unit 121 determines that the humidity inside the manhole 2 is always 100%. It is further determined that the accumulated water 3 exists in the interior S of the manhole 2, and the determination result that the accumulated water 3 exists in the interior S of the manhole 2 is outputted to the determination unit 122.

For example, if the judgment unit 121 determines based on the humidity measurement information that the humidity in the interior S of the manhole 2 is not always 100%, except immediately after the iron cover 230 of the manhole 2 is opened and closed, it further determines that there is no accumulated water 3 in the interior S of the manhole 2, and outputs the judgment result that there is no accumulated water 3 in the interior S of the manhole 2 to the decision unit 122.

Alternatively, the determination unit 121 refers to the graph of humidity transition inside the manhole 2 S shown in FIG. 8 based on the humidity measurement information received from the hygrometer 300, and determines whether the slope of the humidity against time for any two days is 0 or not, and further determines whether accumulated water 3 is present inside the manhole 2 S. Then, the determination unit 121 outputs the determination result to the decision unit 122.

For example, based on the humidity measurement information, the judgment unit 121 refers to a graph of humidity trends inside S of manhole 2, and if it determines that the slope of humidity versus time for any two days is 0, it further judges that accumulated water 3 is present inside S of manhole 2, and outputs the judgment result that accumulated water 3 is present inside S of manhole 2 to the decision unit 122.

For example, based on the humidity measurement information, the judgment unit 121 refers to a graph of humidity trends inside S of the manhole 2, and if it determines that the slope of humidity versus time for any two days is not zero, it further judges that there is no accumulated water 3 inside S of the manhole 2, and outputs the judgment result that there is no accumulated water 3 inside S of the manhole 2 to the decision unit 122.

The determination unit 122 determines the inspection period for manhole 2 based on the judgment result input from the judgment unit 121.

The memory unit 130 stores any information used in the operation of the determination device 100. For example, the memory unit 130 stores humidity measurement information measured by the hygrometer 300, the judgment result judged by the judgment unit 121, the inspection period determined by the determination unit 122, the inspection time determined by the determination unit 122, etc. In addition to this, the memory unit 130 stores, for example, various programs and data.

The communication unit 150 has a function of communicating with the hygrometer 300. The communication unit 150 receives, for example, humidity measurement information measured by the hygrometer 300 from the hygrometer 300.

The determination system 20 according to this embodiment includes a determination unit 121 that determines whether or not accumulated water 3 is present inside S of the manhole 2 based on humidity measurement information measured by the hygrometer 300, and a determination unit 122 that determines the inspection cycle for the manhole 2 based on the determination result. This makes it possible to determine an appropriate inspection cycle for each manhole 2 that reflects the neutralization progression rate in each manhole 2, without the need to collect samples or perform on-site measurements by destructive testing. Therefore, a determination system 20 that enables efficient maintenance and management of the manholes 2 can be realized.

[Determination method 1]
Next, an example of a determination method according to the third embodiment will be described with reference to FIG.

In step S401, the hygrometer 300 measures the humidity inside S of the manhole 2. Then, the hygrometer 300 transmits the humidity measurement information to the determination device 100.

In step S402, the determination device 100 receives humidity measurement information detected by the hygrometer 300 from the hygrometer 300. Then, the determination device 100 stores the received humidity measurement information.

In step S403, the determining device 100 determines whether the humidity inside the manhole 2 is always 100%, for example, except immediately after the iron cover 230 is opened and closed, based on the humidity measurement information. When determining that the humidity in the interior S of the manhole 2 is always 100% except immediately after the iron lid 230 is opened and closed (step S403→Yes), the determining device 100 performs the process of step S404. When determining that the humidity in the interior S of the manhole 2 is not always 100% except immediately after the iron lid 230 is opened and closed (step S403→No), the determining device 100 performs the process of step S405.

In step S404, the determination device 100 determines that accumulated water 3 is present inside the manhole 2, because the humidity inside the manhole 2 is always 100%, except immediately after the iron cover 230 is opened or closed. The determination device 100 then performs the process of step S406.

In step S405, the determination device 100 determines that the accumulated water 3 does not exist in the interior S of the manhole 2 because the humidity inside the manhole 2 is not always 100% except immediately after the iron lid 230 is opened and closed. The determining device 100 then performs the process of step S407.

In step S406, the determination device 100 determines that the inspection period for manhole 2 should be extended beyond the conventional inspection period.

In step S407, the determining device 100 determines that the inspection cycle of the manhole 2 is to be the same as the conventional inspection cycle.

By applying the determination method of this embodiment to determine the inspection period for manhole 2, efficient maintenance and management of manhole 2 is possible.

[Determination method 2]
Next, an example of another determination method according to the third embodiment will be described with reference to FIG. 11.

In step S501, the hygrometer 300 measures the humidity inside the manhole 2. The hygrometer 300 then transmits the humidity measurement information to the determination device 100.

In step S502, the determination device 100 receives humidity measurement information detected by the hygrometer 300 from the hygrometer 300. The determination device 100 then stores the received humidity measurement information.

In step S503, the determining device 100 refers to the graph of the humidity change in the interior S of the manhole 2 shown in FIG. Determine whether it exists or not. When determining that the slope of humidity with respect to time is 0 for any two days (step S503→YES), the determining device 100 performs the process of step S504. When determining that the slope of humidity with respect to time is not 0 for any two days (step S503→NO), the determining device 100 performs the process of step S505.

In step S504, the determining device 100 refers to the graph of the humidity change in the interior S of the manhole 2, and since the slope of the humidity with respect to time is 0 for any two days, there is accumulated water 3 in the interior S of the manhole 2. Then it is determined. The determining device 100 then performs the process of step S506.

In step S505, the determining device 100 refers to the graph of the humidity change in the interior S of the manhole 2, and determines that since the slope of the humidity with respect to time for any two days is not 0 (zero), the determination device 100 It is determined that does not exist. Then, the determining device 100 performs the process of step S507.

In step S506, the determination device 100 determines that the inspection period for manhole 2 should be extended beyond the conventional inspection period.

In step S507, the determining device 100 determines to make the inspection cycle of the manhole 2 the same as the conventional inspection cycle.

By applying the determination method of this embodiment to determine the inspection period for manhole 2, efficient maintenance and management of manhole 2 is possible.

<Fourth embodiment>
Next, an example of the configuration of the determination system 30 according to the fourth embodiment will be described with reference to FIG. 12.

The determination system 30 includes a determination device 100 and a camera 400. The determining device 100 includes an input section 110, a control section 120, a storage section 130, an output section 140, and a communication section 150. The determining device 100 and the camera 400 are communicably connected by wire or wirelessly. Note that redundant description of the same configuration as the determining device 100 according to the first embodiment may be omitted.

Camera 400 is provided inside S of manhole 2. The installation position of the camera 400 is not particularly limited, as long as it is installed at a position where it can photograph at least the water collection part 224 in the interior S of the manhole 2.

The camera 400 photographs the inside S of the manhole 2. In particular, the camera 400 photographs the accumulated water 3 present in the water collection section 224 inside the manhole 2 S. Then, the camera 400 transmits captured image information of the interior S of the manhole 2 to the determination device 100.

The determination unit 121 determines whether or not the accumulated water 3 is present in the interior S of the manhole 2 based on the photographed image information photographed by the camera 400. The determination unit 121 then outputs the determination result to the determination unit 122.

The storage unit 130 stores any information used in the operation of the determination device 100. For example, the storage unit 130 stores image information captured by the camera 400, the determination result determined by the determination unit 121, the inspection period determined by the determination unit 122, the inspection time determined by the determination unit 122, etc. In addition to this, the storage unit 130 stores, for example, various programs and data.

The communication unit 150 has a function of communicating with the camera 400. The communication unit 150 receives, for example, captured image information captured by the camera 400 from the camera 400.

The determination system 30 according to the present embodiment includes a determination unit 121 that determines whether or not accumulated water 3 exists in the interior S of the manhole 2 based on photographed image information photographed by a camera 400, and a and a determining unit 122 that determines the inspection cycle of the manhole 2. As a result, it is possible to determine an appropriate inspection cycle for each manhole 2 that reflects the rate of progress of carbonation in each manhole 2, without having to take samples or perform on-site measurements using destructive tests. Therefore, the determination system 30 that enables efficient maintenance and management of the manhole 2 can be realized.

<Decision method>
Next, an example of the determination method according to the fourth embodiment will be described with reference to FIG. 13.

In step S601, the camera 400 captures an image of the interior S of the manhole 2. The camera 400 then transmits the captured image information to the determination device 100.

In step S<b>602 , the determining device 100 receives captured image information captured by the camera 400 from the camera 400 . The determining device 100 then stores the received photographed image information.

In step S603, the determination device 100 determines whether or not accumulated water 3 is present inside the manhole 2 based on the captured image information. If the determination device 100 determines that accumulated water 3 is present inside the manhole 2 (step S603 → Yes), it performs processing of step S604. If the determination device 100 determines that accumulated water 3 is not present inside the manhole 2 (step S603 → No), it performs processing of step S605.

In step S604, the determination device 100 determines that the inspection period for manhole 2 should be extended beyond the conventional inspection period.

In step S605, the determining device 100 determines that the inspection cycle of the manhole 2 is to be the same as the conventional inspection cycle.

By applying the determination method of this embodiment to determine the inspection period for manhole 2, efficient maintenance and management of manhole 2 is possible.

<Modification>
Next, an example of a determination method according to a modified example will be described with reference to FIG.

The difference between the determination method according to the modification and the determination method according to the embodiment is that the determination method according to the embodiment performs processing based on the assumption that deterioration occurs in manhole 2 due to carbonation. The determination method according to the modification is based on the assumption that the manhole 2 deteriorates due to a cause other than carbonation, such as salt contained in the materials of various members. The determination method according to the modified example is the same as the determination method according to the embodiment except for the different premises, so a duplicate explanation may be omitted. In general, there are only a few causes of deterioration of the manhole 2 other than carbonation.

In step S701, the determination device 100 determines whether the manhole 2 is one that deteriorates due to factors other than neutralization. If the determination device 100 determines that the manhole 2 is one that deteriorates due to factors other than neutralization (step S701 → Yes), it performs processing of step S702. If the determination device 100 determines that the manhole 2 is not one that deteriorates due to factors other than neutralization (step S701 → No), it performs processing of step S703.

In step S702, the determining device 100 determines to make the inspection cycle of the manhole 2 the same as the conventional inspection cycle.

In step S703, the determination device 100 determines whether or not there is accumulated water 3 inside S of the manhole 2, based on accumulated water information previously compiled into a database and stored in the memory unit 130, or based on accumulated water information directly input by the operator. When the determination device 100 determines that there is accumulated water 3 inside S of the manhole 2 (step S703 → Yes), it performs the process of step S704. When the determination device 100 determines that there is no accumulated water 3 inside S of the manhole 2 (step S703 → No), it performs the process of step S702.

In step S704, the determination device 100 determines that the inspection period for manhole 2 should be extended beyond the conventional inspection period.

By applying the determination method according to the present embodiment to determine the inspection frequency of the manhole 2, even if the manhole 2 deteriorates due to carbonation, the manhole 2 can be Even if deterioration occurs due to a cause, an appropriate inspection interval can be determined for each manhole 2 without collecting samples or performing on-site measurements by destructive testing. This enables efficient maintenance and management of the manhole 2.

<Other variations>
The present invention is not limited to the above-described embodiments and modifications. For example, the various processes described above may not only be executed in chronological order according to the description, but may also be executed in parallel or individually depending on the processing capacity of the device executing the process or as necessary. Other changes may be made as appropriate without departing from the spirit of the present invention.

<Program and recording medium>
It is also possible to use a computer capable of executing program instructions to function as the above-mentioned embodiment and modified example. The computer can be realized by storing a program describing the processing contents for realizing the functions of each device in the storage unit of the computer and reading and executing the program by the processor of the computer, and at least a part of the processing contents may be realized by hardware. Here, the computer may be a general-purpose computer, a dedicated computer, a workstation, a PC, an electronic notepad, etc. The program instructions may be program code, code segments, etc. for performing the necessary tasks. The processor may be a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), etc.

For example, referring to Figure 3, a program for causing a computer to execute the above-mentioned determination method includes a step (S101) of determining whether or not accumulated water exists inside a reinforced concrete structure, and steps (S102, S103) of determining an inspection period for the reinforced concrete structure based on the determination result.

This program may also be recorded on a computer-readable recording medium. Using such a recording medium, the program can be installed on a computer. Here, the recording medium on which the program is recorded may be a non-transient recording medium. The non-transient recording medium may be a CD (Compact Disk)-ROM (Read-Only Memory), a DVD (Digital Versatile Disc)-ROM, a BD (Blu-ray Disc (registered trademark))-ROM, or the like. This program may also be provided by downloading over a network.

Although the above-mentioned embodiment has been described as a representative example, it will be apparent to those skilled in the art that many modifications and substitutions can be made within the spirit and scope of the present disclosure. Therefore, the present invention should not be interpreted as being limited by the above-mentioned embodiment, and various modifications and changes are possible without departing from the scope of the claims. For example, it is possible to combine multiple configuration blocks shown in the configuration diagram of the embodiment into one, or to divide one configuration block. It is also possible to combine multiple steps shown in the flowchart of the embodiment into one, or to divide one step.

2 Manhole 3 Accumulated water 10 Determination system 20 Determination system 30 Determination system 100 Determination device 110 Input unit 120 Control unit 121 Judgment unit 122 Determination unit 130 Memory unit 140 Output unit 150 Communication unit 200 Moisture detection sensor 210 Neck unit 220 Body unit 221 Upper deck 222 Lower deck 223 Side wall unit 230 Iron cover 300 Hygrometer 302 Underground 400 Camera

Claims (7)

a determination unit that determines whether or not accumulated water exists in a water collection section inside the reinforced concrete structure;
A determination unit that determines an inspection period of the reinforced concrete structure based on a determination result by the determination unit;
A determination device comprising: The determination unit is
When the determination unit determines that the accumulated water does not exist, the inspection period is set to the same as the conventional inspection period,
When the determination unit determines that the accumulated water exists , the inspection period is made longer than the conventional inspection period.
The determination device according to claim 1 . A moisture detection sensor that detects whether moisture is present in a water collection portion inside a reinforced concrete structure;
a determination unit that determines whether or not water is present inside the device based on information detected by the moisture detection sensor;
A determination unit that determines an inspection period of the reinforced concrete structure based on a determination result by the determination unit;
A decision system comprising: A hygrometer that measures humidity in a water collection section inside a reinforced concrete structure;
a determination unit that determines whether or not water is present inside the device based on information measured by the hygrometer;
A determination unit that determines an inspection period of the reinforced concrete structure based on a determination result by the determination unit;
A decision system comprising: A camera that photographs the water collection area inside the reinforced concrete structure,
a determination unit that determines whether or not accumulated water exists inside the interior based on image information captured by the camera;
a determining unit that determines an inspection cycle for the reinforced concrete structure based on the determination result by the determining unit;
A decision system comprising: A step of determining whether or not pooled water exists in a water collection section inside the reinforced concrete structure;
determining an inspection cycle for the reinforced concrete structure based on a result of the determining step;
A method of determining. The step of determining includes:
If it is determined in the determining step that the accumulated water does not exist, making the inspection cycle the same as a conventional inspection cycle;
If it is determined that the accumulated water is present in the determining step, making the inspection cycle longer than the conventional inspection cycle;
The determination method according to claim 6, comprising:

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