WO2022085047A1

WO2022085047A1 - Determination device, determination system, and determination method

Info

Publication number: WO2022085047A1
Application number: PCT/JP2020/039260
Authority: WO
Inventors: 久稔笠原; 陽祐竹内; 陽介岡村
Original assignee: 日本電信電話株式会社
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2022-04-28
Also published as: JPWO2022085047A1; JP7460932B2

Abstract

A determination device (100) according to the present invention comprises an evaluation unit (121) that evaluates whether there is pooled water (3) within a reinforced concrete structure (2), and a determination unit (122) that determines, on the basis of an evaluation result of the evaluation unit (121), an inspection cycle for the reinforced concrete structure (2).

Description

Decision device, decision system, and decision method

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

There are several deterioration phenomena of reinforced concrete, one of which is neutralization. Neutralization is a phenomenon in which concrete, which was alkaline at the time of casting, gradually becomes neutral from the surface (interface between concrete and air) due to carbon dioxide in the atmosphere. Corrosion does not proceed because the internal reinforcing bars form a passivation in an alkaline environment, but corrosion progresses in a neutral environment. Therefore, the neutralization causes the internal reinforcing bars to corrode and reduce the wall thickness, which reduces the strength of the reinforced concrete.

The rate of progress of neutralization in reinforced concrete structures differs depending on the environment, material conditions, etc. (see, for example, Non-Patent Document 1). Therefore, if the reinforced concrete structure is classified according to the neutralization progress speed and an appropriate inspection time and inspection cycle are assigned, maintenance can be carried out more efficiently. For example, for a reinforced concrete structure in which neutralization hardly progresses, the inspection cycle may be extended from the current one.

However, in many cases, the neutralization progress rate is not reflected in the inspection cycle and inspection time for reinforced concrete structures. The reason why it has not been reflected is that it may take a lot of work to grasp the progress of neutralization. In order to grasp the neutralization of concrete, it is necessary to take a sample or perform on-site measurement by a destructive test, and the operation is more than inspection. As a result, there has been a problem that it is difficult to efficiently maintain and manage the reinforced concrete structure.

The purpose 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 of a reinforced concrete structure.

The determination device according to one embodiment determines the inspection cycle of the reinforced concrete structure based on the determination unit for determining whether or not the accumulated water is present inside the reinforced concrete structure and the determination result by the determination unit. It has a decision unit.

The determination system according to the embodiment includes a moisture detection sensor that detects whether or not moisture is present in the water collecting portion inside the reinforced concrete structure, and the inside of the reinforced concrete structure based on the information detected by the moisture detection sensor. A determination unit for determining whether or not the accumulated water is present, and a determination unit for determining the inspection cycle of the reinforced concrete structure based on the determination result by the determination unit are provided.

In the determination method according to one embodiment, the inspection cycle of the reinforced concrete structure is determined based on the step of determining whether or not the accumulated water is present inside the reinforced concrete structure and the determination result of the determination step. Including steps.

According to the present disclosure, it is possible to provide a determination device, a determination system, and a determination method that enable efficient maintenance of a reinforced concrete structure.

It is a figure which shows an example of the structure of the manhole whose inspection cycle is determined by the determination apparatus which concerns on 1st Embodiment. It is a block diagram which shows an example of the structure of the determination apparatus which concerns on 1st Embodiment. It is a figure which shows an example of the difference of the neutralization progress depending on the presence or absence of the accumulated water which concerns on 1st Embodiment. It is a flowchart which shows an example of the determination method which concerns on 1st Embodiment. It is a flowchart which shows another example of the determination method which concerns on 1st Embodiment. It is a block diagram which shows an example of the structure of the determination system which concerns on 2nd Embodiment. It is a flowchart which shows an example of the determination method which concerns on 2nd Embodiment. It is a block diagram which shows an example of the structure of the determination system which concerns on 3rd Embodiment. It is a figure which shows an example of the years of reaching a neutralized reinforcing bar in a manhole which concerns on 3rd Embodiment. It is a figure which shows an example of the difference of the humidity by the presence or absence of the accumulated water which concerns on 3rd Embodiment. It is a flowchart which shows an example of the determination method which concerns on 3rd Embodiment. It is a flowchart which shows another example of the determination method which concerns on 3rd Embodiment. It is a block diagram which shows an example of the structure of the determination system which concerns on 4th Embodiment. It is a flowchart which shows an example of the determination method which concerns on 4th Embodiment. It is a flowchart which shows an example of the determination method which concerns on the modification.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In principle, the same components are given the same reference numbers, and duplicate explanations are omitted. In each figure, for convenience of explanation, the aspect ratio of each configuration is exaggerated from the actual ratio. Further, in the following description, "upper" means a positive direction on the Z axis of the coordinate axis display drawn in the drawing, and "lower" means a negative direction on the Z axis of the coordinate axis display drawn in the drawing. It shall mean the direction of. However, "upper" and "lower" are defined for convenience only and should not be interpreted in a limited manner.

<First Embodiment>
[Determining device]
An example of the configuration of the determination device according to the first embodiment will be described with reference to FIGS. 1A, 1B, and 2.

The determination device 100 is an device that determines the inspection cycle of the reinforced concrete structure. Examples of the reinforced concrete structure include a manhole 2.

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

The manhole 2 is, for example, a standard product communication manhole. The manhole 2 includes a neck portion 210, a skeleton portion 220, an iron lid 230, and the like. The neck portion 210 has, for example, a substantially cylindrical shape, and the skeleton portion 220 has, for example, a substantially rectangular parallelepiped shape. The iron lid 230 has a substantially cylindrical shape and fits into the manhole hole which is the entrance / exit of the manhole 2. The neck 210 and the skeleton 220 are made of reinforced concrete. The skeleton portion 220 includes an upper floor slab 221, a lower floor slab 222, and a side wall portion 223.

The interior S of the manhole 2 is surrounded by the ceiling surface R of the upper floor slab 221 in the skeleton 220, the wall surface J of the side wall 223 in the skeleton 220, the floor surface F of the lower floor slab 222 in the skeleton 220, and the like. A water collecting portion (recessed portion) 224 for the purpose of collecting water is provided on the floor surface F of the lower floor slab 222 in the skeleton portion 220. In the manhole 2, the accumulated water 3 that flows into the internal S of the manhole 2 due to rainfall or the like has a structure of being accumulated from the water collecting portion 224. Once the pooled water 3 flows into the internal S of the manhole 2, it is difficult for it to flow out and does not disappear naturally.

Further, with reference to FIG. 2, the relationship between the neutralization of the manhole 2 and the reservoir water 3 will be briefly explained. In FIG. 2, the horizontal axis indicates the age of the material (the period after the concrete is placed) [year], and the vertical axis indicates the neutralization depth [mm]. Further, in FIG. 2, the neutralization depth in the manhole 2 in which the reservoir water 3 is present is indicated by a black circle, and the neutralization depth in the manhole 2 in which the reservoir water 3 is not present is indicated by a white circle.

From FIG. 2, the neutralization depth when the reservoir water 3 does not exist in the inner S of the manhole 2 is larger than the neutralization depth when the reservoir water 3 exists in the inner S of the manhole 2. I understand. That is, it can be seen that when the pooled water 3 does not exist in the inside S of the manhole 2, the neutralization proceeds, but when the pooled water 3 exists in the inside S of the manhole 2, the neutralization hardly progresses.

Therefore, the neutralization progress rate in the manhole 2 depends on whether or not the reservoir 3 is present in the internal S of the manhole 2, and the neutralization progress rate in the manhole 2 when the reservoir 3 is not present is the reservoir. It is presumed that it is faster than the neutralization progress rate in the manhole 2 in the presence of water 3. That is, it is presumed that determining the presence or absence of the accumulated water 3 in the inner S of the manhole 2 is appropriate from the viewpoint of determining the neutralization progress rate in the 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 as long as it can be operated by an operator, and may be, for example, a microphone, a touch panel, a keyboard, a mouse, or the like. For example, the operator inspects the inside S of the manhole 2, visually confirms whether or not the accumulated water exists inside the manhole 2, and indicates whether or not the accumulated water exists inside the manhole 2. The accumulated water information may be input 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 stored in the storage unit 130 in advance as a database by being input by an operator into, for example, Excel (registered trademark). 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, a general-purpose processor, or a processor specialized for a specific process. The control unit 120 includes a determination unit 121 and a determination unit 122.

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

For example, when the determination unit 121 determines that the accumulated water 3 exists in the internal S of the manhole 2 based on the accumulated water information, the determination unit 121 determines to the determination unit 122 that the accumulated water 3 exists in the internal S of the manhole 2. Output. For example, when the determination unit 121 determines that the accumulated water 3 does not exist in the internal S of the manhole 2 based on the accumulated water information, the determination unit 122 determines the determination result that the accumulated water 3 does not exist in the internal S of the manhole 2. Output to.

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

For example, the determination unit 122 determines that the inspection cycle of the manhole 2 is extended from the conventional inspection cycle based on the determination result that the accumulated water 3 exists in the internal S of the manhole 2 input from the determination unit 121. ..

For example, the determination unit 122 determines that the inspection cycle of the manhole 2 is the same as the conventional inspection cycle based on the determination result that the accumulated water 3 does not exist in the internal S of the manhole 2 input from the determination unit 121. do.

When the determination unit 122 determines the specific number of years for the inspection cycle, for example, referring to FIG. 9, the year 2000 is theoretically based on a humidity of about 85% and a water-cement ratio of about 77%. The above is considered to be appropriate, but this inspection cycle is only a theoretical value. In fact, when the determination unit 122 determines the inspection cycle, it considers not only the deterioration of the manhole 2 (for example, deterioration due to neutralization) but also the deterioration of the cable and the metal member supporting the cable. There is a need. Therefore, it is preferable that the determination unit 122 determines the inspection cycle in consideration of the deterioration data of various members stored in the storage unit 130 in addition to the determination result input from the determination unit 121. In addition to the deterioration of various members, the equipment may be destroyed by an unexpected external force, and making the inspection cycle too long is a risk. Therefore, it is more preferable that the determination unit 122 determines the inspection cycle on the assumption of such an external force.

The storage unit 130 includes one or more memories, and may include, for example, a semiconductor memory, a magnetic memory, an 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 have to be provided inside the determination device 100, and may be provided outside the determination device 100.

The storage unit 130 stores arbitrary information used for the operation of the determination device 100. For example, the storage unit 130 stores the accumulated water information, the determination result determined by the determination unit 121, the inspection cycle determined by the determination unit 122, the inspection time determined by the determination unit 122, and the like. 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 an inspection cycle and an inspection time. The output unit 140 may be integrated with the determination device 100 or may be provided separately.

The determination device 100 according to the present embodiment has a determination unit 121 for determining whether or not the accumulated water 3 exists in the internal S of the manhole 2, and a determination unit 122 for determining the inspection cycle of the manhole 2 based on the determination result. And. This makes it possible to determine an appropriate inspection cycle for each manhole 2 that reflects the neutralization progress rate in each manhole 2 without performing on-site measurement by sampling or destructive test. Therefore, it is possible to realize the determination device 100 that enables efficient maintenance of the manhole 2.

[Determination method 1]
Next, an example of the 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 the pooled water 3 exists in the internal S of the manhole 2 based on the pooled water information stored in the storage unit 130 in advance as a database. When the determination device 100 determines that the accumulated water 3 exists in the internal S of the manhole 2 (step S101 → Yes), the determination device 100 performs the process of step S102. When the determination device 100 determines that the pooled water 3 does not exist in the internal S of the manhole 2 (step S101 → No), the determination device 100 performs the process of step S103.

In step S102, the determination device 100 determines that the inspection cycle of the manhole 2 is extended from the conventional inspection cycle.

In step S103, the determination device 100 determines that the inspection cycle of the manhole 2 is the same as the conventional inspection cycle.

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

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

In step S201, the worker inspects the internal S of the manhole 2. Then, the operator visually confirms whether or not the pooled water 3 exists in the internal S of the manhole 2. When the operator confirms that the pooled water 3 exists in the inside S of the manhole 2, the operator performs a predetermined operation via the input unit 110 to determine that the pooled water 3 exists in the inside S of the manhole 2. The indicated accumulated water information is input to the determination device 100. On the other hand, when the operator confirms that the accumulated water 3 does not exist in the internal S of the manhole 2, the operator performs a predetermined operation via the input unit 110 so that the accumulated water 3 does not exist in the internal S of the manhole 2. The accumulated water information indicating that is input to the determination device 100. In most cases, the presence or absence of the accumulated water 3 in the internal S of the manhole 2 can be clearly confirmed visually by the operator.

In step S202, the determination device 100 stores the accumulated water information. The determination device 100 is inspected directly at the site by the operator and manually input to the determination device 100, and stores the updated accumulated water information each time the inspection is performed. The updated pool water information is information corresponding to changes in the manhole 2 with the passage of time. Therefore, for example, when the reservoir 3 suddenly flows into the manhole 2 due to an unexpected accident or the like, it is useful for the determination device 100 to apply the updated pool information.

In step S203, the determination device 100 determines whether or not the pool water 3 exists in the internal S of the manhole 2 based on the pool water information directly input by the operator. When the determination device 100 determines that the accumulated water 3 exists in the internal S of the manhole 2 (step S203 → Yes), the determination device 100 performs the process of step S204. When the determination device 100 determines that the accumulated water 3 does not exist in the internal S of the manhole 2 (step S203 → No), the determination device 100 performs the process of step S205.

In step S204, the determination device 100 determines that the inspection cycle of the manhole 2 is extended from the conventional inspection cycle.

In step S205, the determination device 100 determines that the inspection cycle of the manhole 2 is the same as the conventional inspection cycle.

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

<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.

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

The moisture detection sensor 200 is provided in the water collecting portion 224 in the internal S of the manhole 2. By providing the moisture detection sensor 200 in the water collecting portion 224 where the accumulated water 3 tends to accumulate, it is possible to detect the moisture with higher accuracy.

The moisture detection sensor 200 detects whether or not moisture is present in the water collecting portion 224 in the internal S of the manhole 2. Then, the moisture detection sensor 200 transmits moisture detection information indicating whether or not moisture is present in the water collecting portion 224 in the internal S of the manhole 2 to the determination device 100.

The determination unit 121 determines whether or not water is present in the water collecting unit 224 in the internal S of the manhole 2 based on the moisture detection information received from the moisture detection sensor 200, and further, stores the water in the internal S of the manhole 2. Determine if water 3 is present. Then, the determination unit 121 outputs the determination result to the determination unit 122.

For example, when the determination unit 121 determines that water is present in the water collecting unit 224 in the inner S of the manhole 2 based on the moisture detection information, it further determines that the accumulated water 3 is present in the inner S of the manhole 2 and further determines that the manhole 2 is present. The determination result that the accumulated water 3 exists in the internal S of 2 is output to the determination unit 122.

For example, when the determination unit 121 determines that there is no water in the water collecting unit 224 in the inner S of the manhole 2 based on the moisture detection information, it further determines that the accumulated water 3 does not exist in the inner S of the manhole 2. , The determination result that the accumulated water 3 does not exist in the internal S of the manhole 2 is output to the determination unit 122.

The determination unit 122 determines the inspection cycle of the manhole 2 based on the determination result input from the determination 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 cycle determined by the determination unit 122, the inspection time determined by the determination unit 122, and the like. 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, the moisture detection information detected by the moisture detection sensor 200 from the moisture detection sensor 200.

The determination system 10 according to the present embodiment has a determination unit 121 for determining whether or not the accumulated water 3 exists in the internal S of the manhole 2 based on the moisture detection information detected by the moisture detection sensor 200, and a determination result. A determination unit 122 for determining the inspection cycle of the manhole 2 is provided based on the above. This makes it possible to determine an appropriate inspection cycle for each manhole 2 that reflects the neutralization progress rate in each manhole 2 without performing on-site measurement by sampling or destructive test. Therefore, it is possible to realize a determination system 10 that enables efficient maintenance of the manhole 2.

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

In step S301, the moisture detection sensor 200 detects whether or not moisture is present in the water collecting portion 224 in the internal S of 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 the 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 collecting portion 224 in the inner S of the manhole 2 based on the moisture detection information. When the determination device 100 determines that water is present in the water collecting portion 224 in the inner S of the manhole 2 (step S303 → Yes), the determination device 100 performs the process of step S304. When the determination device 100 determines that no water is present in the water collecting portion 224 in the inner S of the manhole 2 (step S303 → No), the determination device 100 performs the process of step S305.

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

In step S305, the determination device 100 determines that the accumulated water 3 does not exist in the inner S of the manhole 2 because the water collecting portion 224 in the inner S of the manhole 2 does not have water. Then, the determination device 100 performs the process of step S307.

In step S306, the determination device 100 determines that the inspection cycle of the manhole 2 is extended from the conventional inspection cycle.

In step S307, the determination device 100 determines that the inspection cycle of the manhole 2 is the same as the conventional inspection cycle.

<Third Embodiment>
Next, an example of the configuration of the determination system according to the third embodiment will be described with reference to FIGS. 7 to 9.

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 storage unit 130, an output unit 140, and a communication unit 150. The determination device 100 and the hygrometer 300 are communicably connected by wire or wirelessly. In the determination system 10, duplicate description may be omitted for the same configuration as the determination device 100 according to the first embodiment.

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

The hygrometer 300 measures the humidity in the internal S of the manhole 2. Then, the hygrometer 300 transmits humidity measurement information including information on the humidity in the internal S of the manhole 2 at a predetermined time, information on the humidity transition in the internal S of the manhole 2 that changes with the passage of time, and the like to the determination device 100. .. As a specific value of the humidity measurement information, for example, FIG. 8 can be referred to.

Since the entrance and exit of the manhole 2 is closed by the iron lid 230, the internal S is a semi-sealed environment. Therefore, when the accumulated water 3 is present in the inner S of the manhole 2, the humidity of the inner S is always 100% due to the evaporation action of water except immediately after opening and closing the iron lid 230 (about 1 day). .. On the other hand, when the accumulated water 3 does not exist in the internal S of the manhole 2, the humidity of the internal S does not always reach 100%.

Here, with reference to FIG. 8, the humidity transition in the internal S of the manhole 2 will be briefly described. In FIG. 8, the horizontal axis indicates the date and time [t] at which the humidity in the internal S of the manhole 2 is measured, and the vertical axis indicates the humidity [%] in the internal S of the manhole 2.

From FIG. 8, the humidity when the pooled water 3 does not exist in the inside S of the manhole 2 has a large fluctuation with the passage of time as compared with the humidity when the pooled water 3 exists in the inside S of the manhole 2. I understand.

Further, from FIG. 8, it can be seen that the humidity when the reservoir water 3 does not exist in the internal S of the manhole 2 is rarely 100%, and the minimum value thereof is lowered to about 65%. On the other hand, it can be seen that the humidity when the reservoir water 3 is present in the inner S of the manhole 2 is always 100%. In general, the fact that the humidity in the internal S of the manhole 2 is 65% is a boundary condition in which the neutralization progress rate in the manhole 2 increases, although a difference occurs due to the addition of other conditions. I can say.

That is, it is suggested from FIG. 8 that it is possible to determine whether or not the accumulated water 3 is present in the inner S of the manhole 2 based on the humidity in the inner S of the manhole 2. Specifically, for example, except immediately after opening and closing the iron lid 230 in the manhole 2, whether or not the humidity in the internal S of the manhole 2 is always 100%, the humidity transition in the internal S of the manhole 2 shown in FIG. Refer to the graph of, and determine whether or not the accumulated water 3 exists in the internal S of the manhole 2 based on whether or not the humidity gradient with respect to time is 0 (zero) for any two days. Is suggested to be possible.

Further, with reference to FIG. 9, the relationship between the humidity in the internal S of the manhole 2 and the number of years [year] in which the neutralization reaches the position of the reinforcing bar (25 mm from the surface) in the manhole 2 will be briefly described. .. In addition to the experimentally calculated values, the number of years [year] shown in FIG. 9 includes some of the past findings referred to in Non-Patent Document 1.

From FIG. 9, it can be seen that when the humidity is 90 [%] or more, the neutralization in the manhole 2 does not proceed. Further, it can be seen that as the humidity becomes smaller as 85 [%], 80 [%], and 65 [%], the number of years [year] for the neutralization to reach the position of the reinforcing bar in the manhole 2 becomes shorter. In particular, at a humidity of 65 [%], it can be seen that the neutralization reaches the position of the reinforcing bar in several decades at the earliest, although there is a slight difference depending on the water-cement ratio.

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

Based on the humidity measurement information received from the hygrometer 300, the determination unit 121 determines whether or not the humidity in the internal S of the manhole 2 is always 100% except immediately after the opening and closing of the iron lid 230 in the manhole 2. Further, it is determined whether or not the accumulated water 3 exists in the internal S of the manhole 2. Then, the determination unit 121 outputs the determination result to the determination unit 122.

For example, when the determination unit 121 determines based on the humidity measurement information that the humidity in the internal S of the manhole 2 is always 100% except immediately after the opening and closing of the iron lid 230 in the manhole 2, the internal S of the manhole 2 is determined. Further, it is determined that the accumulated water 3 is present in the manhole 2, and the determination result that the accumulated water 3 is present in the inner S of the manhole 2 is output to the determination unit 122.

For example, when the determination unit 121 determines based on the humidity measurement information that the humidity in the internal S of the manhole 2 is not always 100% except immediately after the opening and closing of the iron lid 230 in the manhole 2, the determination unit 121 determines that the internal S of the manhole 2 is not 100%. It is further determined that the accumulated water 3 does not exist, and the determination result that the accumulated water 3 does not exist in the internal S of the manhole 2 is output to the determination unit 122.

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

For example, when the determination unit 121 refers to the graph of the humidity transition in the internal S of the manhole 2 based on the humidity measurement information and determines that the slope of the humidity with respect to time is 0 for any two days, the determination unit 121 of the manhole 2 It is further determined that the accumulated water 3 exists in the internal S, and the determination result that the accumulated water 3 exists in the internal S of the manhole 2 is output to the determination unit 122.

For example, when the determination unit 121 refers to the graph of the humidity transition in the internal S of the manhole 2 based on the humidity measurement information and determines that the slope of the humidity with respect to time is not 0 for any two days, the inside of the manhole 2 It is further determined that the accumulated water 3 does not exist in S, and the determination result that the accumulated water 3 does not exist in the internal S of the manhole 2 is output to the determination unit 122.

The storage unit 130 stores arbitrary information used for the operation of the determination device 100. For example, the storage unit 130 stores humidity measurement information measured by the hygrometer 300, a determination result determined by the determination unit 121, an inspection cycle determined by the determination unit 122, an inspection time determined by the determination unit 122, and the like. do. 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 hygrometer 300. The communication unit 150 receives, for example, the humidity measurement information measured by the hygrometer 300 from the hygrometer 300.

The determination system 20 according to the present embodiment has a determination unit 121 for determining whether or not the accumulated water 3 exists in the internal S of the manhole 2 based on the humidity measurement information measured by the hygrometer 300, and the determination result. Based on this, a determination unit 122 for determining the inspection cycle of the manhole 2 is provided. This makes it possible to determine an appropriate inspection cycle for each manhole 2 that reflects the neutralization progress rate in each manhole 2 without performing on-site measurement by sampling or destructive test. Therefore, it is possible to realize a determination system 20 that enables efficient maintenance of the manhole 2.

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

In step S401, the hygrometer 300 measures the humidity in the internal 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 the 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 determination device 100 determines whether or not the humidity in the internal S of the manhole 2 is always 100%, except immediately after opening and closing the iron lid 230, for example, based on the humidity measurement information. When the determination device 100 determines that the humidity in the internal S of the manhole 2 is always 100% except immediately after opening and closing the iron lid 230 (step S403 → Yes), the determination device 100 performs the process of step S404. When the determination device 100 determines that the humidity in the internal S of the manhole 2 is not always 100% except immediately after opening and closing the iron lid 230 (step S403 → No), the determination device 100 performs the process of step S405.

In step S404, the determination device 100 determines that the accumulated water 3 exists in the internal S of the manhole 2 because the humidity in the internal S of the manhole 2 is always 100% except immediately after the opening and closing of the iron lid 230. Then, the determination device 100 performs the process of step S406.

In step S405, the determination device 100 determines that the accumulated water 3 does not exist in the internal S of the manhole 2 because the humidity in the internal S of the manhole 2 except immediately after the opening and closing of the iron lid 230 is not always 100%. Then, the determination device 100 performs the process of step S407.

In step S406, the determination device 100 determines that the inspection cycle of the manhole 2 is extended from the conventional inspection cycle.

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

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

In step S501, the hygrometer 300 measures the humidity in the internal S of the manhole 2. Then, the hygrometer 300 transmits the humidity measurement information to the determination device 100.

In step S502, the determination device 100 receives the 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 S503, the determination device 100 refers to, for example, a graph of the humidity transition in the internal S of the manhole 2 shown in FIG. 8 based on the humidity measurement information, and the slope of the humidity with respect to time is 0 for any two days. Determine if it exists. When the determination device 100 determines that the humidity gradient with respect to time is 0 for any two days (step S503 → YES), the determination device 100 performs the process of step S504. When the determination device 100 determines that the humidity gradient with respect to time is not 0 for any two days (step S503 → NO), the determination device 100 performs the process of step S505.

In step S504, the determination device 100 refers to the graph of the humidity transition in the internal S of the manhole 2, and since the slope of the humidity with respect to time is 0 for any two days, the reservoir water 3 exists in the internal S of the manhole 2. Then it is determined. Then, the determination device 100 performs the process of step S506.

In step S505, the determination device 100 refers to the graph of the humidity transition in the internal S of the manhole 2, and since the slope of the humidity with respect to time is not 0 (zero) for any two days, the pooled water 3 is stored in the internal S of the manhole 2. Is determined not to exist. Then, the determination device 100 performs the process of step S507.

In step S506, the determination device 100 determines that the inspection cycle of the manhole 2 is extended from the conventional inspection cycle.

In step S507, the determination device 100 determines that the inspection cycle of the manhole 2 is the same as the conventional inspection cycle.

<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 determination device 100 includes an input unit 110, a control unit 120, a storage unit 130, an output unit 140, and a communication unit 150. The determination device 100 and the camera 400 are communicably connected by wire or wirelessly. Regarding the same configuration as the determination device 100 according to the first embodiment, duplicate description may be omitted.

The camera 400 is provided in the internal S of the manhole 2. The installation position of the camera 400 is not particularly limited, and at least the water collecting portion 224 in the internal S of the manhole 2 may be provided at a position where photography is possible.

The camera 400 photographs the internal S of the manhole 2. The camera 400 particularly captures the accumulated water 3 existing in the water collecting portion 224 in the inner S of the manhole 2. Then, the camera 400 transmits the photographed image information captured by the internal S of the manhole 2 to the determination device 100.

The determination unit 121 determines whether or not the pooled water 3 exists in the internal S of the manhole 2 based on the captured image information captured by the camera 400. Then, the determination unit 121 outputs the determination result to the determination unit 122.

The storage unit 130 stores arbitrary information used for the operation of the determination device 100. For example, the storage unit 130 stores captured image information captured by the camera 400, a determination result determined by the determination unit 121, an inspection cycle determined by the determination unit 122, an inspection time determined by the determination unit 122, and the like. .. 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, the captured image information captured by the camera 400 from the camera 400.

The determination system 30 according to the present embodiment is based on the determination unit 121 that determines whether or not the pooled water 3 exists in the internal S of the manhole 2 based on the photographed image information captured by the camera 400, and the determination result. A determination unit 122 for determining the inspection cycle of the manhole 2 is provided. This makes it possible to determine an appropriate inspection cycle for each manhole 2 that reflects the neutralization progress rate in each manhole 2 without performing on-site measurement by sampling or destructive test. Therefore, it is possible to realize a determination system 30 that enables efficient maintenance of the manhole 2.

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

In step S601, the camera 400 photographs the inside S of the manhole 2. Then, the camera 400 transmits the captured image information to the determination device 100.

In step S602, the determination device 100 receives the captured image information captured by the camera 400 from the camera 400. Then, the determination device 100 stores the received photographed image information.

In step S603, the determination device 100 determines whether or not the pooled water 3 exists in the internal S of the manhole 2 based on the captured image information. When the determination device 100 determines that the accumulated water 3 exists in the internal S of the manhole 2 (step S603 → Yes), the determination device 100 performs the process of step S604. When the determination device 100 determines that the accumulated water 3 does not exist in the internal S of the manhole 2 (step S603 → No), the determination device 100 performs the process of step S605.

In step S604, the determination device 100 determines that the inspection cycle of the manhole 2 is extended from the conventional inspection cycle.

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

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

The difference between the determination method according to the modified example and the determination method according to the embodiment is that the determination method according to the embodiment performs processing on the premise that the manhole 2 is deteriorated due to neutralization. Therefore, the determination method according to the modified example is to perform processing on the premise that the manhole 2 is deteriorated due to a cause other than neutralization, such as the material of various members containing salt. Since the determination method according to the modified example is the same as the determination method according to the embodiment except that the premise is different, duplicate explanations may be omitted. In general, there are only a few causes of deterioration of the manhole 2 other than neutralization.

In step S701, the determination device 100 determines whether or not the manhole 2 causes deterioration other than neutralization. When the determination device 100 determines that the manhole 2 causes deterioration other than neutralization (step S701 → Yes), the determination device 100 performs the process of step S702. When the determination device 100 determines that the manhole 2 is not a manhole 2 that causes deterioration other than neutralization (step S701 → No), the determination device 100 performs the process of step S703.

In step S702, the determination device 100 determines that the inspection cycle of the manhole 2 is the same as the conventional inspection cycle.

In step S703, the determination device 100 stores water 3 in the internal S of the manhole 2 based on the stored water information stored in the storage unit 130 in advance as a database or the stored water information directly input by the operator. Determines if is present. When the determination device 100 determines that the accumulated water 3 exists in the internal S of the manhole 2 (step S703 → Yes), the determination device 100 performs the process of step S704. When the determination device 100 determines that the accumulated water 3 does not exist in the internal S of the manhole 2 (step S703 → No), the determination device 100 performs the process of step S702.

In step S704, the determination device 100 determines that the inspection cycle of the manhole 2 is extended from the conventional inspection cycle.

By applying the determination method according to the present embodiment to determine the inspection cycle of the manhole 2, even if the manhole 2 is deteriorated due to the neutralization, the manhole 2 is not neutralized. Even in the case of deterioration due to the cause, an appropriate inspection cycle can be determined for each manhole 2 without taking a sample or performing on-site measurement by a destructive test. This enables efficient maintenance of the manhole 2.

<Other variants>
The present invention is not limited to the above 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 as required by the processing capacity of the device that executes the processes. In addition, changes can be made as appropriate without departing from the spirit of the present invention.

<Programs and recording media>
It is also possible to use a computer capable of executing program instructions to function as the above embodiment and modification. The computer can be realized by storing a program describing the processing contents that realize the functions of each device in the storage unit of the computer, and reading and executing this program by the processor of the computer. At least a part of the processing content may be realized by hardware. Here, the computer may be a general-purpose computer, a dedicated computer, a workstation, a PC, an electronic notebook pad, or the like. The program instruction may be a program code, a code segment, or the like for executing a necessary task. 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), or the like.

For example, the program for causing the computer to execute the above-mentioned determination method is based on the step (S101) of determining whether or not the accumulated water is present inside the reinforced concrete structure and the determination result, referring to FIG. , The steps (S102, S103) for determining the inspection cycle of the reinforced concrete structure.

Further, this program may be recorded on a recording medium that can be read by a computer. Using such a recording medium, it is possible to install the program on the computer. Here, the recording medium on which the program is recorded may be a non-transient recording medium. Even if the non-transient recording medium is a CD (Compact Disk) -ROM (Read-Only Memory), DVD (Digital Versatile Disc) -ROM, BD (Blu-ray Disc (registered trademark)) -ROM, etc. good. The program can also be provided by download over the network.

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

2 Manhole 3 Reservoir 10 Decision system 20 Decision system 30 Decision system 100 Decision device 110 Input section 120 Control section 121 Judgment section 122 Decision section 130 Storage section 140 Output section 150 Communication section 200 Moisture detection sensor 210 Head section 220 Frame section 221 Upper floor version 222 Lower floor slab 223 Side wall 230 Iron lid 300 Hygrometer 302 Underground 400 Camera

Claims

A determination unit that determines whether or not there is accumulated water inside the reinforced concrete structure,
A determination unit that determines the inspection cycle of the reinforced concrete structure based on the determination result by the determination unit, and a determination unit.
A decision device.
The decision-making part
When the determination unit determines that the accumulated water is present, the inspection cycle is set to be the same as the conventional inspection cycle.
When the determination unit determines that the accumulated water does not exist, the inspection cycle is made longer than the conventional inspection cycle.
The determination device according to claim 1.
A moisture detection sensor that detects whether or not moisture is present in the water collecting part inside the reinforced concrete structure,
Based on the information detected by the moisture detection sensor, a determination unit that determines whether or not there is accumulated water inside, and a determination unit.
A determination unit that determines the inspection cycle of the reinforced concrete structure based on the determination result by the determination unit, and a determination unit.
A decision system.
A hygrometer that measures the humidity inside a reinforced concrete structure,
Based on the information measured by the hygrometer, a determination unit that determines whether or not there is accumulated water inside the hygrometer, and a determination unit.
A determination unit that determines the inspection cycle of the reinforced concrete structure based on the determination result by the determination unit, and a determination unit.
A decision system.
A camera that captures the inside of a reinforced concrete structure,
Based on the image information taken by the camera, a determination unit that determines whether or not there is accumulated water inside the camera, and a determination unit that determines whether or not there is accumulated water inside.
A determination unit that determines the inspection cycle of the reinforced concrete structure based on the determination result by the determination unit, and a determination unit.
A decision system.
Steps to determine if there is pool inside the reinforced concrete structure,
A step of determining the inspection cycle of the reinforced concrete structure based on the determination result of the determination step, and
How to decide, including.
The step to determine is
When it is determined by the determination step that the accumulated water is present, the step of making the inspection cycle the same as the conventional inspection cycle and the step
When it is determined by the determination step that the accumulated water does not exist, the step of lengthening the inspection cycle to the conventional inspection cycle and the step of making the inspection cycle longer than the conventional inspection cycle.
6. The determination method according to claim 6.