JP2018054568A - Water permeability inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water permeability inspection device that has a high workability and can facilitate an installation operation and removal operation.SOLUTION: The water permeability inspection device includes: a close contact device 30 that forms a sealed space 25 between the inspection device and a surface 2a of a concrete 2 and brings the inspection device into close contact with the surface 2a of the concrete 2 by decompressing the sealed space 25; a chamber 40 that is attached to the close contact device 30 and has a water chargeable space 5 between it and the concrete 2; and a detector 51 that is attached to the chamber 40 and detects the amount of water charged into the space 5. The chamber 40 is detachably fixed to the contact device 30.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a water permeability inspection apparatus that inspects a water permeability (performance) in a depth direction in a concrete surface layer portion, for example.

  In recent years, the number of aging concrete structures has increased, and it has become necessary to evaluate the safety of concrete structures in order to properly diagnose the deterioration of these concrete structures. Various proposals have been made.

  In addition, there is a need to evaluate that the performance after construction of the surface impregnation method used for the purpose of extending the life and durability of the concrete structure has improved.

  For example, conventionally, as one of the test methods, a water permeability test is known as a technique used for quality evaluation of concrete (see Patent Document 1).

  This type of conventional water permeability test measures, for example, the amount of water absorbed by concrete through a water absorption cup having a circular cross-sectional shape, and the water absorption cup is attached to a fixed frame provided with an adsorbent that is vacuum-adsorbed. Is provided. Then, after adsorbing the adsorbent to the concrete to be inspected, the opening of the water absorption cup is brought into close contact with the concrete surface, the water is filled in the water absorption cup, and the amount of water decrease due to the water absorption action of the concrete is detected. .

Japanese Unexamined Patent Publication No. 2016-3909

  By the way, when the above-described water permeability inspection apparatus is installed on a vertical surface, the existing water permeability inspection apparatus is large and requires heavy equipment such as a generator. The workability was poor.

  In addition, when the water permeability inspection apparatus is large, it is difficult to carry it and it is difficult to store it in a vehicle or the like. Therefore, there is a demand for an apparatus that can be disassembled well and can be easily prepared for inspection.

  Therefore, the present invention has been made with the above problem as an example of an object, and an object thereof is to provide a water permeability inspection apparatus that is excellent in workability and excellent in workability capable of easily performing installation work and removal work. .

  In order to solve the above problem, the water permeability inspection device (S) according to claim 1 forms a space (5) filled with water between the surface (2a) of the concrete (2), and In the water permeability inspection apparatus for inspecting the water permeability of concrete based on the degree of water decrease in the space which is reduced by the water absorption action of concrete, a sealed space (25) is formed between the surface of the concrete and this sealing A close contact device (30) for tightly contacting a concrete surface by decompressing the space, a chamber (40) attached to the close contact device and having the space capable of filling water between the concrete, and the chamber And a detector (51) for detecting the amount of water filled in the space, wherein the chamber is detachably fixed to the contact device. .

  Further, the water permeability test apparatus according to claim 2 is the water permeability test apparatus according to claim 1, wherein a supply device (10) for supplying water to the space is detachably attached to the chamber. It is characterized by.

  Moreover, the water permeability test apparatus according to claim 3 is the water permeability test apparatus according to claim 1 or 2, wherein a contact region (R) by the contact device is formed around the chamber. It is characterized by.

  Moreover, the water permeability test | inspection apparatus of Claim 4 is a water permeability test | inspection apparatus as described in any one of Claims 1-3. WHEREIN: The said chamber has the positioning means (42) at the time of attaching to the said contact | adherence apparatus. It is characterized by having.

  According to the present invention, since the water permeability inspection apparatus can be separated and carried and can be installed in an integrated manner, the installation work can be rapidly advanced and the workability is good. In addition, since the chamber is attached to the contact device using the positioning means, the installation work can be proceeded quickly and the workability is good.

It is a schematic diagram which shows the state at the time of attaching a water permeability test | inspection apparatus to the side wall surface of concrete. It is a schematic diagram which shows the AA cross section of FIG. It is a schematic diagram for demonstrating the attachment method which attaches a chamber with respect to a contact | adherence apparatus. It is a schematic diagram which shows the other Example of the example of arrangement | positioning. It is a schematic diagram which shows the structure of the water-permeability test | inspection apparatus of 2nd Example.

  Hereinafter, the best embodiment of the present application will be described with reference to the accompanying drawings.

  The water permeability inspection apparatus S of this embodiment is an apparatus that inspects the water permeability of concrete 2 in order to evaluate the surface layer quality (deterioration) of a concrete structure (hereinafter simply referred to as “concrete 2”), for example. . The water permeability inspection device S forms a space 5 filled with liquid between the surface 2a of the concrete 2 and detects the amount of liquid decrease in the space 5 that decreases due to the water absorption action of the concrete 2. . In addition, although evaluation of the surface layer quality of concrete is performed by various methods based on the detected amount of decrease in liquid, since various methods are already known, the description thereof will be omitted. Moreover, in this embodiment, although water is used as a liquid, it is not specifically limited.

  Although the water permeability inspection apparatus S of this embodiment demonstrates an example installed in the outer wall (side wall) surface of a predetermined structure, for example, the surface 2a of the concrete 2 used as the object of installation is not restricted to a side wall surface, A floor surface, a ceiling surface, an inclined surface, and the like are also included, and all directions are targeted.

  For example, as shown in FIGS. 1 and 2, the water permeability inspection apparatus S of the present embodiment is attached to the side wall surface of the concrete 2, and water is placed in a space 5 disposed in close contact with the surface 2 a of the concrete 2. And a detection device 20 for detecting the amount of water that has been reduced due to the water absorption action of the concrete 2.

  If necessary, an air removing device is provided for removing air remaining in the space 5 when water is supplied into the space 5.

  The detection device 20 includes a contact device 30 that can be in close contact with the surface 2 a of the concrete 2, a chamber 40 that has a space 40 a that can be filled with water between the surface 2 a of the concrete 2, and water that decreases due to the water absorption action of the concrete 2. And a measuring device 50 that measures the amount of decrease in.

  The contact device 30 includes a flat base 21 having a substantially rectangular opening 21a penetrating the front and back surfaces at the center, seal members 23 provided on both right and left sides of the base 21 with the opening 21a interposed therebetween, A vacuum pump 26 and an open valve 27 are provided on the surface of the base 21 separately on the left and right sides of the opening 21a.

  For example, the base 21 is formed in a substantially rectangular shape using a resin material. The material, size, or shape of the base 21 is appropriately designed depending on the size of the vacuum pump 26, the size of the chamber 40, and the like, and is not particularly limited. As in the present embodiment, it is formed in a rectangular shape, the chamber 40 is arranged at the center thereof, and the vacuum pump 26 and the open valve 27 are separately installed on both sides thereof, thereby improving the weight balance of the entire detection device 20, Since it becomes easy for an operator to hold, there is an advantage that it is easy to perform installation work and removal work.

  1 and 2, for example, the seal member 23 is a belt-like member having a predetermined thickness and is attached so as to surround a predetermined region. As shown in FIG. 2, the end surface of the seal member 23 is attached. Is in close contact with the surface 2 a of the concrete 2, a sealed space 25 is formed between the base 21 and the concrete 2.

  The thickness of the seal member 23 is, for example, about 5 to 10 mm, and is appropriately designed in consideration of the size of the base, the weight including the vacuum pump, the unevenness of the concrete 2a, and the like. The seal member 23 is preferably made of an elastic member such as rubber and made of a material that can be appropriately deformed by reducing pressure.

  The seal member 23 is fixed to the bottom surface of the base 21 with an adhesive or the like, and is appropriately replaced when worn or deteriorated or after a lapse of a certain period.

  The shape, position, size, etc. of the region surrounded by the seal member 23 are appropriately designed according to the shape, weight, size, etc. of the base 21 and are not particularly limited.

  For example, the vacuum pump 26 and the release valve 27 are fixed on the base 21 and connected to each other by a path 28 constituted by a tubular member or the like that can pass air, and a space 25 formed by the seal member 23. The space 25 is depressurized by driving the vacuum pump 26, and the space 25 depressurized by operating the opening valve 27 is returned to atmospheric pressure.

  In this manner, the contact device 30 depressurizes the space 25 by the vacuum pump 26 so that the base 21 is adsorbed on the surface 2a of the concrete 2 and is fixed to the surface 2a of the concrete 2. On the other hand, the base 21 is removed from the surface 2 a of the concrete 2 by releasing the space 25 to the atmospheric pressure by operating the release valve 27, and the contact device 30 is removed from the surface 2 a of the concrete 2.

  The operation of the release valve 27 means that a path connected to the atmosphere (not shown) is blocked or opened to the atmosphere. When the space 25 is set to a vacuum pressure, the path is blocked and the space is opened. When returning the inside of 25 to atmospheric pressure, the path is opened.

  The chamber 40 is provided separately from the close contact device 30, and is attached to the close contact device 30 so as to be detachable as appropriate. The chabamba 40 includes a base portion 41 that is mounted on the base body 21, a cylindrical portion 42 that can be fitted into the opening 21 a of the base body 21 and protrudes from the back surface of the base portion 41 (positioning means of the present application), Have

  The base portion 41 is formed of a substantially rectangular transparent member having a predetermined thickness. As shown in FIGS. 1 and 3, the chamber 40 is attached to and detached from the base 21 evenly around the central axis of the transparent member. A fixing member 45 is attached. Specifically, the fixing member 45 is attached to the periphery (four corners) of the base portion 41, and the base portion 41 is formed with a fixing member insertion hole 41 b for attaching the fixing member 45. Also, the base 21 is formed with a hole 21b having a screw coaxially with the hole 41b, and the chamber 40 can be attached to and detached from the base 21 by a fixing member 45 inserted into the holes 41b and 21b. Fixed to.

  The fixing member 45 includes a shaft portion 46 having a screw (not shown) formed on the outer periphery extending in one direction, a substantially circular head portion 47 having a predetermined thickness attached to one end of the shaft portion 46, and The base portion 41 of the chamber 40 is fixed to the base 21 of the contact device 30 by screwing the screw of the shaft portion 46 with the screw (not shown) of the hole 21b formed in the base 21.

  The base portion 41 is formed of a transparent member so as to make it possible to visually recognize the presence of water supplied to the chamber 40 and air remaining in the chamber 40, but may be a non-permeable member. .

  The cylinder part 42 has an opening at one end, has a substantially circular cross section, and has a space 40a in which water can be filled inside. Moreover, the cylinder part 42 is provided in the approximate center part of the base part 41, functions as a fitting part that fits into the opening 21a formed in the base 21, and the cylinder part 42 is fitted into the opening 21a. The base portion 41 can be easily positioned at a predetermined position of the base 21.

  The thickness of the cylindrical portion 42 is preferably formed to be substantially the same as the thickness of the base 21, and when the chamber 40 is attached to the base 21, the bottom surface thereof is flat (flat) as shown in FIG. Attached to.

  The tube portion 42 is designed as appropriate, and may be formed in a rectangular tube shape, for example, and the shape is not particularly limited.

  Moreover, the strip | belt-shaped sealing member 43 which has predetermined | prescribed thickness is provided in the front-end | tip of the cylinder part 42, for example. The seal member 43 is, for example, the same member as the seal member 23 provided on the base 21 and is a belt-like member having a predetermined thickness and is disposed so as to surround a predetermined region.

  In addition, since this sealing member 43 is filled with water in the area | region enclosed by the sealing member, it is preferable to have a water stop property which prevents the leakage of water. Therefore, for example, the seal member 43 is formed with a seal layer on the inner side or the like by painting or the like, or a material having water-stopping property, but is not limited to these forms.

  And when the base part 41 is attached to the base | substrate 21, the end surface of the sealing member 43 closely_contact | adheres to the surface 2a of the concrete 2, and the sealed space 40a which can be filled with water between the base part 41 and the concrete 2 is formed. It is formed.

  In the present embodiment, the cylindrical portion 42 is formed in order to form the space 40a that can be filled with water. However, when the space (space) filled with water is sufficient in the space formed by the seal member 43, You may form in flat form, without setting it as the cylinder part 42. FIG. In this case, the region formed by the seal member 43 functions as a space 40a filled with water.

  Moreover, it is preferable that this cylinder part 42 is integrally formed in the back surface of the base | substrate 21 by cutting. As a result, it is possible to prevent water leakage due to poor adhesion due to the joining of the two members, and to easily form the sealed space 40a (5).

  Further, in the present embodiment, an example in which the vacuum pump 26 and the release valve 27 are integrally attached to the base body 21 has been described. However, the release valve 27 is not an essential configuration and is provided as appropriate. A vacuum pump 26 provided as a separate body may be prepared and configured to be connected to the space 25 via a connection tube or the like.

  The supply device 10 has a path 12 constituted by a tubular member or the like connected to a supply source 11 for supplying water. The path 12 is connected to an opening 41 a formed on the peripheral surface of the base portion 41. Etc. are fixedly connected. The connecting pipe or the like may be detachable. A valve 13 is provided on the path 12, and water can be supplied or blocked in the space 5 by operating the valve 13.

  An opening 41 d to which the measuring device 50 is connected is formed on the peripheral surface of the base portion 41.

  The measuring device 50 includes a cylindrical cylinder 51 (detector) formed of a transparent material, and has a memory 52 indicating the amount of water on the surface of the cylinder 51.

  The upper end of the cylinder 51 has an opening 51a that is open to the atmosphere. The cylinder 51 is attached via an opening 41d formed in the base portion 41 and a connection pipe (not shown). The space 53 is in communication with a space 40 a formed in the chamber 40. The two spaces 40a and 53 are in communication with each other and function as the space 5 filled with water of the present application, and the amount of water in the space 5 is indicated by the memory 52.

  Therefore, the water is filled up to the specified amount in the space 53 of the cylinder 51 beyond the capacity of the space 40a, and the amount of water when the water is fully filled is compared with the amount of water that has been absorbed and reduced by the water absorption action of the concrete 2. By doing this, the amount of water absorbed by the concrete 2 can be easily measured (detected).

  Since the connecting pipe is made of a member that can be freely bent around its axis, when the water permeability inspection device S is installed on the inclined surface, the cylinder 51 can be easily arranged vertically, and the amount of water can be accurately measured. Can be detected. Further, by using a pipe body having a predetermined length for the connecting pipe, the cylinder 51 can be disposed at a position away from the closely contacted position, and further bent by using an elastic member such as a rubber tube. This makes it possible to freely arrange the cylinder at a position desired by the user.

  As described above, the water permeability test apparatus S according to the present embodiment can be easily detached and carried because the chamber 40 can be easily attached to and detached from the contact apparatus 30 and performs a water permeability test. In this case, since the close contact device 30 and the chamber 40 can be easily integrated and installed, the installation work can be quickly performed and the workability is good. Further, since the chamber 40 can be easily positioned in the opening 21a of the base body 21 of the close contact device 30 by the cylindrical portion 42, the installation work can be rapidly advanced and the workability is good.

  Next, an inspection method for water permeability inspection will be described in detail.

  First, the chamber 40 is attached to the contact device 30. Specifically, the base 41 is positioned by fitting the cylindrical portion 42 of the chamber 40 into the opening 21 a of the base 21 of the contact device 30, and a part of the base 41 overlaps the base 21 by the fixing member 45. Thus, the chamber 40 is attached to the contact | adherence apparatus 30 by being fixed.

  The chamber 40 may be attached after the contact device 30 is brought into close contact with the surface 2a of the concrete 2.

  Next, in order to install the water permeability inspection device S on the surface 2a of the concrete 2 to be inspected, the contact device 30 having the chamber 40 attached to the surface 2a of the concrete 2 is fixed. The close contact device 30 positions the base 21 so that the seal member 23 faces the surface 2a of the concrete 2 and then drives the vacuum pump 26 to reduce the pressure in the space 25 so that the seal member 23 is elastically deformed and closely contacted. By doing so, it is fixed to the surface 2 a of the concrete 2. Similarly, the chamber 40 is fixed to the surface 2a of the concrete 2 by driving the vacuum pump 26 and reducing the pressure in the space 25 so that the seal member 43 comes into close contact while being elastically deformed.

  Next, the space 5 is filled with water supplied from the supply source via the path 12. The water is filled up to a predetermined reference position in the space 53 of the cylinder 51 beyond the capacity of the space 40 a formed in the chamber 40.

  In this way, the water permeability inspection device S fills the cylinder 51 with the reference position, reads the memory 52 of the water level that has decreased from the reference position after a lapse of a certain time, and based on the difference in the water level. Evaluation is performed.

  Next, another example of arrangement of the chamber 40, the adsorption device 30, or the vacuum pump 26 will be described with reference to FIG. In FIG. 4, parts that are the same as those in FIG. 2 are given the same reference numerals, and descriptions thereof are omitted.

  In the above embodiment, the base body 21 is formed in a rectangular shape. However, as shown in FIG. 4A, the water permeability inspection apparatus of this embodiment forms the base body 21 in a circular shape, for example. The chamber 40 is disposed at the center, and an adsorption region R formed by the seal member 23 is formed around the entire chamber 40.

  In this way, since the entire periphery of the chamber 40 is the adsorption region R by the seal member 23, the space 40a formed in the chamber 40 can be firmly attached to the surface 2a of the concrete 2.

  The vacuum chamber 26 and the opening valve 27 are arranged on both the left and right sides around the chamber 40.

  Further, for example, in the water permeability inspection apparatus of the present embodiment, as shown in FIG. 4B or FIG. 4C, the base 21 is formed in a substantially rectangular shape, and an opening 21a is formed in a part thereof. The chamber 40 is disposed in the opening 21a, and an adsorption region R formed by the seal member 23 is formed around the chamber 40. Further, the vacuum chamber 26 and the release valve 27 are appropriately arranged in an empty area around the chamber 40.

  FIG. 4B shows a form in which the entire periphery of the chamber 40 is an adsorption region R by the seal member 23. FIG. 4C shows the chamber 40 arranged on one side of the base 21 and the other side on the seal member. 23, a suction region R formed by 23.

  Thus, the size and shape of the base 21 and the arrangement of the vacuum pump 26 and the like are appropriately designed and are not particularly limited.

  Next, another embodiment of the water permeability inspection device S will be described with reference to FIG. 5 that are the same as those in FIG. 1 are given the same reference numerals, and descriptions thereof are omitted. Further, the present embodiment is different from the first embodiment in that a pressurizing unit that pressurizes water that contacts the surface of the concrete is provided.

  For example, as shown in FIG. 5, the water permeability inspection device S <b> 2 of this embodiment is attached to the top surface of the concrete 2. This water permeability inspection device S2 includes a supply device 10 (see FIG. 1) for supplying water into a space 5 arranged in close contact with the surface 2a of the concrete 2, and the water supplied into the space 5 And a detection device 20A for detecting the amount of water reduced by the water absorption action.

  Although not shown in the drawing, the water permeability inspection device S2 is an air that removes air remaining in the space 5 when water is supplied into the space 5 because the space 5 filled with water is a sealed space. Although a removing device is necessary, the air removing device is a known technique, and therefore its description is omitted.

  The detection device 20 </ b> A includes a contact device 30 that can be in close contact with the surface 2 a of the concrete 2, a chamber 40 that has a space 40 a that can be filled with water between the surface 2 a of the concrete 2, and water that decreases due to the water absorption action of the concrete 2. And a measuring device 50A for measuring the amount of decrease.

  The measuring device 50A of the present embodiment includes a reservoir 70 for storing water in communication with the inside of the chamber 40, and a pressurizing device 56 for pressurizing the water in the reservoir 70.

  The reservoir 70 includes, for example, a cylindrical cylinder 51A made of a transparent material, and has a memory 52 indicating the amount of water on the surface of the cylinder 51A.

  A connection port connected to the connection pipe is formed on the distal end side of the cylinder 51A, and by connecting the connection port to an opening 41d formed in the base portion 41 via a predetermined connection pipe, The space 53 in the cylinder 51 </ b> A communicates with the chamber 40.

  Further, a pressurizing device 56 is provided on the proximal end side of the cylindrical body 51A. The pressurizing device 56 includes a moving body 55 that is arranged in the cylinder body 51 </ b> A and is movable in the axial direction thereof, and a pressurizing body 56 that pressurizes the moving body 55.

  Note that an elastic member such as rubber that shields the inside of the cylinder 51 </ b> A is attached to the tip of the moving body 55, so that the airtightness in the space 53 is maintained. Moreover, the airtightness in the space 53 should just be maintained, and the form is not restricted to a present Example. For example, a gasket or the like may be attached to the peripheral surface of the moving body 55.

  As the pressure member 56, for example, an elastic member 57 such as a spring is used. For example, the elastic member 57 is provided behind the moving body 55, and a lid 58 for closing the opening of the cylindrical body 51A is provided behind the elastic member 57.

  A threaded portion 72 made of, for example, a female screw is formed on the inner side of the base end portion of the cylindrical body 51 </ b> A, and is screwed with a male screw formed on the peripheral surface of the lid 58. The screw portion 72 formed in the cylinder 51A is formed longer than the thickness of the lid 58, and the lid 58 is attached so as to be movable in the axial direction of the cylinder 51A as shown by an arrow in FIG. . The biasing force can be increased or decreased by the elastic member 57 by the movement of the lid 58, and the initial position of the water amount is adjusted by adjusting the position of the moving body 55.

  Thus, the water filled in the space is constantly pressurized against the concrete surface by the urging force of the elastic member 57. Further, this pressure is adjusted by changing the elastic coefficient and material of the elastic member 57 and adjusting the position of the lid 58.

  Thus, since the space in the cylinder 51A communicates with the space 40a formed in the chamber 40 via the connecting pipe, the two spaces 40a and 53 are the space 5 filled with the water of the present application. The amount of water in the space 5 is indicated by the memory 52.

  Therefore, the amount of water absorbed by the concrete 2 can be easily measured (detected) by the amount of water decrease in the memory 52.

  As described above, the water permeability inspection device S2 of the present embodiment constantly pressurizes the water filled in the space 5 so that the water is absorbed by the concrete 2 even when the water permeability inspection device S2 is installed on the ceiling surface. The amount of water that has been absorbed and reduced can be easily visually confirmed.

  Moreover, the visibility at the time of visually recognizing the memory 52 can be easily improved by connecting the reservoir 70 and the opening 41d of the base portion 41 by a connecting pipe having a predetermined length. Further, by using an elastic member such as rubber for the connecting pipe, the measuring device 50A can be easily moved and the arrangement position can be easily changed.

  In the present embodiment, since it is necessary to remove the air in the space 53 of the cylinder 51A, after the cylinder 51A in which the space 53 has been previously filled with water is attached to the chamber 40, the water into the space 5 is removed. It is desirable to perform filling. Moreover, you may provide an air removal apparatus in the cylinder 51A separately.

Further, the water permeability inspection device S2 of the present embodiment is particularly effective for installing the water permeability inspection device S2 on the ceiling surface, and can be installed with the chamber 40 fixed to the contact device 30. The installation work on the ceiling surface is easier than conventional water permeability inspection devices, and the workability can be reduced. In addition, since the close contact device 30 and the chamber 40 can be easily separated, they are decomposed during transportation. Further, since water is constantly pressurized to the surface 2a of the concrete 2, the inspection time can be shortened.

  In this embodiment, the urging force is always applied to the moving body 55 by the spring, but other forms may be used.

  In addition, this application is not limited to this embodiment, It can implement in a various form and can combine each Example suitably.

S, S2 Permeability inspection device 2 Concrete 5, 25 Space 30 Contact device 40 Chamber 51 Cylinder 10 Supply device

Claims (5)

In the water permeability inspection device that forms a space filled with water between the surface of the concrete and inspects the water permeability of the concrete on the basis of the decrease in water in the space that is reduced by the water absorption action of the concrete.
An adhesion device that forms a sealed space with the surface of the concrete, and closes the sealed space to the concrete surface by depressurizing the sealed space;
A chamber attached to the contact device and having a space in which water can be filled with the concrete;
A detector attached to the chamber for detecting the amount of water filled in the space;
Comprising
The water permeable inspection device, wherein the chamber is detachably fixed to the contact device.   A water permeability inspection apparatus, wherein a supply device for supplying water to the space is detachably attached to the chamber.   The water permeation inspection apparatus according to claim 1, wherein a contact area by the contact apparatus is formed around the chamber.   The said chamber is provided with the positioning means at the time of attaching to the said close_contact | adherence apparatus, The water permeability test | inspection apparatus as described in any one of Claims 1-3 characterized by the above-mentioned.   The water permeability inspection apparatus according to any one of claims 1 to 4, further comprising a pressurizing unit that pressurizes water that contacts the surface of the concrete.

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