JP2018200220A - Cleaning estimation method of water permeable structural material - Google Patents

Abstract

To provide a method for simply and visually estimating a change in degree of clogging before and after the cleaning work at a work site at which the cleaning work for the water permeable structural material is performed.SOLUTION: Sand, dust, and the like are moved into pores of porous concrete 10 used for a pavement road to cause clogging. The cleaning work for eliminating the clogging is periodically performed. For the purpose of estimating a cleaning effect, a test solution 12 is applied to a surface 10S of the porous concrete 10 before and after the cleaning work, a spreading state of the test solution 12 on the surface 10S is measured by thermography, and the spreading states of the test solution 12 before and after the cleaning are compared.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cleaning evaluation method for a water-permeable structure material.

  In recent years, water permeable structural materials such as porous concrete have been used for infiltration products such as paved roads and infiltration ridges, river revetment blocks, and the like. The water-permeable structural material is a porous structural material having many voids, and has functions such as water permeability, air permeability, sound absorption, and vegetation.

  However, the water-permeable structure material may be clogged due to sand, sludge, dust, or the like entering the gap. When the gap is clogged, the function as a water-permeable structure material such as water permeability and air permeability is lowered.

  As a method for recovering the function of a water-permeable structural member in which clogging has occurred, as disclosed in Patent Document 1, cleaning of clogging substances with high-pressure water, removal of clogging substances with compressed air, and vacuum Cleaning work such as suction of clogging substances is performed.

  As an evaluation test for confirming the effect of the cleaning work on the water-permeable structural material, that is, the degree of clogging, there are an RI (Radioisotope) test, an electrical resistance test, a water permeability test, a ventilation test, and the like.

Japanese Patent No. 3998967

  However, the above-mentioned evaluation test requires a large-scale test apparatus and labor, and there are some non-destructive test methods, so that it is difficult to use in the field work on the pavement road where the cleaning work is performed. Furthermore, in the cleaning work for the water permeable structural member, it is desired to visually evaluate the change in the degree of clogging before and after the cleaning work, that is, the effect of the cleaning work.

  The present invention has been made in view of such circumstances, and at the site where the cleaning work is performed on the water permeable structure, it is possible to easily and visually evaluate the change in the degree of clogging before and after the cleaning work. It aims at providing the cleaning evaluation method of a permeable structure material.

  In order to solve the above-described problems, the cleaning evaluation method for a water-permeable structure material of the present invention employs the following means.

  The cleaning evaluation method for a water permeable structure material according to the first aspect of the present invention includes a first step of putting a test liquid from the surface of the water permeable structure material before cleaning, and measuring the spread state of the test liquid on the surface, and cleaning. The second step of measuring the spread state of the test solution on the surface by putting the test solution from the surface of the water-permeable structure member later and the spread state of the test solution before and after cleaning the water-permeable structure member are compared. And a third step.

  In the first aspect, the test liquid is a liquid having a temperature difference of a predetermined value or more with respect to the surface temperature of the water-permeable structure material to be cleaned, and the spread state of the test liquid is measured by thermography. May be.

  In the first aspect, the test solution is in a jelly shape colored with a color different from that of the water-permeable structure material, and the first step and the second step are performed by pressing the test solution against the water-permeable structure material. The spread state may be measured.

  In the first aspect, the first step and the second step may measure the spread state by causing the paper or paper having water absorption to absorb the test liquid.

  In the first aspect, the first step and the second step may measure the spread state of the test solution based on an image acquired by imaging with a camera.

  In the first aspect, the opening tip of the tapered container may be brought into contact with the surface of the water-permeable structure material, and the test solution may be poured from above the container.

  ADVANTAGE OF THE INVENTION According to this invention, it has the effect that the change of the degree of the clogging before and behind cleaning work can be evaluated simply and visually in the field which performed the cleaning work with respect to a water-permeable structure.

It is a schematic diagram which shows the spreading state of the test liquid according to the grade of the clogging of the porous concrete which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the measurement of the spreading state of the test liquid in the surface of the porous concrete which concerns on 1st Embodiment of this invention. It is a flowchart which shows the flow of the cleaning evaluation method which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the spreading state of the jelly-like test liquid according to the grade of the clogging of the porous concrete which concerns on 2nd Embodiment of this invention. It is a schematic diagram which shows the measurement of the spreading state of the test liquid in the surface of the porous concrete which concerns on 3rd Embodiment of this invention.

  Below, one Embodiment of the cleaning evaluation method of the water-permeable structure material which concerns on this invention is described with reference to drawings.

[1. First Embodiment]
The first embodiment of the present invention will be described below.

[1-1. Overview of the cleaning effect evaluation method]
The water permeable structural material according to the present embodiment is a porous structural material, for example, porous concrete. The porous concrete which concerns on this embodiment is used for a pavement as an example. Porous concrete used for paved roads becomes clogged due to sand and dust entering the gaps with the passage of time. For this reason, the cleaning operation | work for eliminating the clogging of the porous concrete used for a paved road is performed regularly.

  In the cleaning work according to the present embodiment, the effect of the cleaning work is evaluated by carrying out the cleaning effect evaluation method at the site where the cleaning work is performed. The cleaning method is, for example, a method of sucking a substance that causes clogging after removing the clogging with high-pressure water, but the cleaning method is not limited to this, and other methods may be used. Good.

  And in the cleaning effect evaluation method which concerns on this embodiment, a test liquid is put in from the surface of the porous concrete made into the pavement, and the degree of clogging is evaluated by measuring the spreading state of this test liquid.

  FIG. 1 is a schematic view showing the spread state of the test liquid 12 according to the degree of clogging of the porous concrete 10, and shows a longitudinal sectional view of the porous concrete as a paved road. FIG. 1A shows a case where the degree of clogging is relatively small. FIG. 1B shows a case where the degree of clogging is relatively large. In FIG. 1B, a hatched area in the porous concrete 10 is a clogged area (hereinafter referred to as “clogged area”) 10A.

  As shown in FIG. 1 (A), when the test solution 12 is poured from the surface 10S of the porous concrete 10 into the porous concrete 10 with a small degree of clogging, the test solution 12 does not spread greatly and moves downward. Permeate water.

  On the other hand, as shown in FIG. 1B, when clogging occurs, the test liquid 12 is difficult to permeate below the clogging region 10A. For this reason, the poured test solution 12 diffuses above the clogging region 10 </ b> A of the porous concrete 10 and rises toward the surface 10 </ b> S of the porous concrete 10. The amount of the test liquid 12 rising to the surface 10S increases relatively as the degree of clogging increases. For this reason, the larger the degree of clogging of the porous concrete 10, the larger the range in which the test liquid 12 spreads on the surface 10S.

  Therefore, in the cleaning effect evaluation method according to the present embodiment, the effect of the cleaning operation is evaluated by comparing the spread state of the test liquid 12 on the surface 10S of the porous concrete 10 before and after cleaning the porous concrete 10.

[1-2. Details of the cleaning effect evaluation method according to this embodiment]
In the cleaning effect evaluation method according to the present embodiment, a liquid having a temperature difference of a predetermined value or more with respect to the surface temperature of the porous concrete 10 to be cleaned is used as the test liquid 12. As an example, the test liquid 12 is poured into the surface 10S of the porous concrete 10 using an inflow container 14 (see FIG. 1), the details of which will be described later.

  As shown in FIG. 2, the spread state of the test solution 12 is measured by a thermography 16 that detects infrared rays emitted from an object and displays a temperature distribution. The temperature difference between the test liquid 12 and the porous concrete 10 may be any temperature difference at which the test liquid 12 can be clearly measured by the thermography 16, and the test liquid 12 may have a higher temperature than the porous concrete 10, It may be low. For example, the temperature of the test liquid 12 is 10 ° C. or lower in the summer season, and the temperature of the test liquid 12 is 30 ° C. or higher in the winter season.

  FIG. 2A is a schematic diagram showing the surface 10S of the porous concrete 10 when the degree of clogging is relatively large. FIG. 2B is a schematic diagram showing the surface 10S of the porous concrete 10 when the degree of clogging is relatively small. 2 (A) and 2 (B), a region 18 (hereinafter referred to as “expansion region”) indicated by slanting lines indicates an expansion state of the test liquid 12 on the surface 10S of the porous concrete 10.

  That is, the spread area 18 shown in FIG. 2A is a spread state of the test liquid 12 on the surface 10S measured when the test liquid 12 is poured into the porous concrete 10 before the cleaning operation. On the other hand, the spread area 18 shown in FIG. 2B is a spread state of the test liquid 12 on the surface 10S measured when the test liquid 12 is poured into the porous concrete 10 after the cleaning operation, and the spread area 18 is cleaned. Relatively small compared to before work.

  As described above, the temperature of the test solution 12 has a temperature difference from the surface 10S of the porous concrete 10. For this reason, by measuring the surface 10S of the porous concrete 10 with the thermography 16, it is possible to easily evaluate the relative change of the spread region 18 before and after the cleaning operation, that is, the cleaning effect.

  When the thermography 16 itself is provided with a display, a change in the degree of clogging before and after the cleaning operation can be easily and visually evaluated at the site where the cleaning operation is performed.

  Further, the thermography 16 may be connected to a portable information processing device, and the measurement result of the thermography 16 before and after the cleaning work may be stored in the portable information processing device. Then, by comparing and displaying the measurement results on the display of the portable information processing apparatus, the cleaning effect can be easily and visually evaluated at the site where the cleaning operation is performed. The portable information processing apparatus is, for example, a notebook personal computer or a tablet terminal.

[1-3. Configuration of inflow container]
As shown in FIG. 1, the inflow container 14 into which the test liquid 12 is poured into the surface 10S of the porous concrete 10 is a container having a wall surface 14A and a tapered opening tip 14B. When the test liquid 12 is poured, the inflow container 14 is arranged so as to contact the porous concrete 10. Then, the test liquid 12 is put from above the inflow container 14.

  Most of the test liquid 12 put from above the inflow container 14 flows along the inclined surface 14C formed in the front end direction of the inflow container 14, and enters the porous concrete 10 from the opening tip 14B. Due to the shape of the inflow container 14, when the test liquid 12 is poured into the porous concrete 10, the test liquid 12 spreads due to the difference in height from which the test liquid 12 is dropped, the direction of the wind, and the strength. Can be prevented.

  In addition, by flowing the test liquid 12 into the porous concrete 10 using the unified inflow container 14, fluctuations in the measurement result due to differences in workers can be prevented.

[1-4. Flow of cleaning effect evaluation method]
FIG. 3 is a flowchart showing the flow of the cleaning effect evaluation method according to the present embodiment.

  First, in step 100, the inflow container 14 is set up on the surface 10S of the porous concrete 10 before the cleaning work, and the test liquid 12 is poured into the surface 10S of the porous concrete 10 through the inflow container 14.

  In the next step 102, the spread state of the test liquid 12 on the surface 10 </ b> S of the porous concrete 10 is measured by the thermography 16.

  In the next step 104, the porous concrete 10 is cleaned.

  In the next step 106, the inflow container 14 is set up on the surface 10S of the porous concrete 10 after the cleaning work, and the test liquid 12 is poured into the surface 10S of the porous concrete 10 through the inflow container 14.

  In the next step 108, the spread state of the test liquid 12 on the surface 10 </ b> S of the porous concrete 10 is measured by the thermography 16.

  In the next step 110, the cleaning effect is evaluated by comparing the spread state of the test solution 12 measured in step 102 with the spread state of the test solution 12 measured in step 108.

  As described above, in the cleaning effect evaluation method according to the present embodiment, the test liquid 12 is added from the surface 10S of the porous concrete 10 before and after the cleaning, and the spread state of the test liquid 12 on the surface 10S is measured by the thermography 16, The spread state of the test liquid 12 before and after cleaning is compared. Accordingly, the cleaning effect evaluation method can easily and visually evaluate a change in the degree of clogging before and after the cleaning work at the site where the cleaning work is performed on the porous concrete 10.

[2. Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described.

  The test solution according to the present embodiment is a jelly-like test solution (hereinafter referred to as “jelly-like test solution”). The jelly-like test liquid according to this embodiment is colored with a color different from that of the porous concrete 10. And the cleaning effect evaluation method which concerns on this embodiment measures the spreading state by which the jelly-like test liquid was pressed on the porous concrete 10 before and after the cleaning operation.

  FIG. 4 is a schematic diagram showing a spread state of the jelly-like test solution 20 according to the present embodiment. FIG. 4A shows a state in which the jelly-like test liquid 20 is disposed on the surface 10S of the porous concrete 10. Since the jelly-like test solution 20 does not flow into the porous concrete 10 as it is, the jelly-like test solution 20 is poured into the porous concrete 10 from the upper side by, for example, the push plate 22 or the like. Then, it is pushed into the porous concrete 10.

  In addition, it is preferable that the magnitude | size of the force which pushes the jelly-like test liquid 20 into the porous concrete 10 is constant irrespective of a measurer. For this reason, the cleaning effect evaluation method according to the present embodiment makes the applied force constant, for example, by placing a weight on the push plate 22.

  FIG. 4B is a schematic diagram showing a case where the jelly-like test liquid 20 is pushed in from the surface 10S of the porous concrete 10 having a relatively small degree of clogging. FIG. 4C is a schematic diagram showing a case where the jelly-like test liquid 20 is pushed in from the surface 10S of the porous concrete 10 having a relatively large degree of clogging.

  As shown in FIG. 4B, even when the jelly-like test solution 20 is pushed in from the surface 10S of the porous concrete 10 with a small degree of clogging, the jelly-like test solution 20 penetrates downward without spreading greatly. .

  On the other hand, as shown in FIG. 4C, when clogging occurs, the jelly-like test solution 20 is unlikely to penetrate below the clogging region 10A. For this reason, the jelly-like test liquid 12 that has been pushed in diffuses above the clogging region 10 </ b> A of the porous concrete 10 and rises toward the surface 10 </ b> S of the porous concrete 10. The amount of the jelly-like test liquid 20 that rises to the surface 10S increases relatively as the degree of clogging increases. For this reason, the larger the degree of clogging of the porous concrete 10, the larger the range in which the jelly-like test solution 20 spreads on the surface 10S.

  Therefore, in the cleaning effect evaluation method according to the present embodiment, the effect of the cleaning operation is evaluated by comparing the spread state of the jelly-like test liquid 20 before and after the porous concrete 10 is cleaned. In the cleaning effect evaluation method according to the present embodiment, as described above, since the jelly-like test solution 20 is colored, the spread state of the jelly-like test solution 20 on the surface 10S of the porous concrete 10 can be easily visually confirmed. I can confirm.

  In addition, the breadth of the jelly-like test liquid 20 before and after the cleaning work is directly measured by a length measuring instrument that measures the length of a ruler or a tape measure, so that the jelly-like test liquid 20 is spread before and after the cleaning work. The state may be compared.

  Further, in the cleaning effect evaluation method according to the present embodiment, the spread state of the jelly-like test liquid 20 may be measured based on an image acquired by imaging with a camera. In this case, in the cleaning effect evaluation method, the cleaning effect may be evaluated by comparing images showing the spread state of the jelly-like test liquid 20 before and after the cleaning operation. As an image comparison, the spread width of the jelly-like test solution 20 may be measured from the image using an information processing apparatus that has read the image, and the comparison may be performed by superimposing the images before and after cleaning. Also good.

[3. Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described.

  In the cleaning effect evaluation method according to the present embodiment, as shown in FIG. 5, the test liquid 12 spread on the surface 10S of the porous concrete 10 before and after cleaning is absorbed by the evaluation paper 24. Then, the cleaning effect is evaluated by comparing the expanded state (expanded region 18) of the test liquid 12 absorbed by the evaluation paper 24 before and after cleaning. FIG. 5A is a schematic diagram showing the surface 10S of the porous concrete 10 when the degree of clogging is relatively large, that is, before the cleaning operation. FIG. 5B is a schematic view showing the surface 10S of the porous concrete 10 when the degree of clogging is relatively small, that is, after the cleaning operation.

  The evaluation paper 24 is water-absorbing paper or a paper-like body, and is preferably one that is difficult to spread by the evaluation paper 24 due to the absorbed water of the test liquid 12 or that can easily retain water without evaporating the water. . Further, the color of the evaluation paper 24 is preferably one that allows easy confirmation of the absorbed test solution 12.

  The test liquid 12 may be colorless and transparent water as long as the test liquid 12 can be easily confirmed when absorbed by the evaluation paper 24.

  As a cleaning effect evaluation method in this embodiment, the width of the test solution 12 absorbed by the evaluation paper 24 is directly measured by a measuring device that measures the length of a tape measure or the like, and compared before and after the cleaning operation. Alternatively, the spread state of the test liquid 12 absorbed in the evaluation paper 24 may be imaged with a camera and compared before and after the cleaning operation.

[4. Other Embodiments]
As mentioned above, although this invention was demonstrated using said each embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various changes or improvements can be added to the above-described embodiments without departing from the gist of the invention, and embodiments to which the changes or improvements are added are also included in the technical scope of the present invention. Moreover, you may combine said each embodiment suitably.

  For example, in each of the embodiments described above, the mode in which the water-permeable structural material is the porous concrete 10 has been described. However, the present invention is not limited to this, and the water-permeable structural material is porous, such as porous asphalt or porous plastic. It is good also as another structural material which is a body and has a water permeability function.

  Moreover, in each said embodiment, although the form which evaluates the cleaning effect with respect to a paved road was demonstrated using the water-permeable structure material for a pavement, this invention is not limited to this and permeates a water-permeable structure material. You may evaluate the cleaning effect with respect to other products using other products, such as permeation products, such as dredging, and a block for river revetment.

  Moreover, although each said embodiment demonstrated the form which measures the spreading state of the test liquid 12 or the jelly-like test liquid 20 using the thermography 16, a camera, or a length measuring instrument etc., this invention is limited to this. Is not to be done. If the spread state of the test solution 12 or the jelly-like test solution 20 can be measured in two dimensions (planar), the spread state of the test solution 12 or the jelly-like test solution 20 is measured using another device. Also good.

10 Porous concrete (permeable structure material)
12 Test solution 14 Inflow container (container)
16 Thermography 24 Evaluation paper (paper or paper)

Claims (6)

A first step of putting a test liquid from the surface of the water-permeable structural material before cleaning, and measuring the spread state of the test liquid on the surface;
A second step of putting the test liquid from the surface of the water-permeable structure material after cleaning, and measuring a spread state of the test liquid on the surface;
A third step of comparing the spread state of the test solution before and after cleaning with respect to the water permeable structural material;
Cleaning evaluation method of water-permeable structure material having The test liquid is a liquid having a temperature difference of a predetermined value or more with respect to the surface temperature of the water-permeable structure material to be cleaned,
The method for cleaning evaluation of a permeable structure material according to claim 1, wherein the spread state of the test solution is measured by thermography. The test solution is a jelly colored with a color different from the water-permeable structure material,
The permeable structure material cleaning evaluation method according to claim 1, wherein the first step and the second step measure a spread state in which the test solution is pressed against the permeable structure material. The method for cleaning evaluation of a water-permeable structure material according to claim 1, wherein the first step and the second step measure the spread state by causing the test liquid to absorb water into a paper or paper-like body having water absorption. 5. The cleaning evaluation method for a water permeable structure material according to claim 3, wherein the first step and the second step measure the spread state of the test solution based on an image acquired by imaging with a camera. The cleaning of the water-permeable structure material according to any one of claims 1 to 5, wherein a tapered opening end of the container is brought into contact with the surface of the water-permeable structure material, and the test liquid is placed from above the container. Evaluation method.

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