Coastal environment reinforced concrete durability monitoring device and method

Abstract

The invention discloses a coastal environment reinforced concrete durability monitoring device and method. The monitoring device comprises a monitoring assembly, a reference assembly and a potential monitoring piece; the monitoring assembly comprises a monitoring installation part and a plurality of monitoring electrodes, the reference assembly comprises a reference installation part and a plurality of reference electrodes, and the monitoring electrodes and the reference electrodes are oppositely arranged and are in signal connection with the potential monitoring part; the potential monitoring part is used for measuring the potential generated between the monitoring electrode and the reference electrode due to chloride ions and obtaining the concentration of the chloride ions in the concrete around the monitoring electrode, so that the aging degree and the remaining durability of the concrete around the monitoring electrode are determined. By arranging a plurality of groups of monitoring electrodes and reference electrodes, the monitoring result is more accurate. By arranging the alignment connecting piece, the monitoring electrode and the reference electrode can be ensured to directly face each other, and the distance between the monitoring electrode and the reference electrode is determined, so that the measurement precision is further improved.

Description

Technical Field

[0001] The present invention belongs to the field of concrete monitoring, and particularly relates to a durability monitoring device and method for reinforced concrete in a coastal environment. Background Art

[0002] In a marine environment with high temperature, high humidity, and high salinity, the steel bars in reinforced concrete structures such as immersed tubes, bridges, and artificial islands are prone to durability problems such as steel bar rust expansion and concrete cracking caused by chloride erosion. In order to maintain the safe service of major projects, sensors are generally embedded during the construction period in key cross-sea projects constructed in the new century to monitor the durability of reinforced concrete structures. However, due to the immaturity of early technologies, sensors were not pre-installed during the construction period in the reinforced concrete structures such as docks and bridges that were built earlier and are already in the service period to monitor their durability. With the extension of the service life of large-scale structural projects, how to ensure the safe service of the reinforced concrete infrastructure built earlier and develop the durability monitoring technology for reinforced concrete structures in the service period has become an important research topic at present.

[0003] Currently, there is little research on the durability monitoring technology for concrete structures in the service period. Traditional concrete durability monitoring sensors are mostly embedded monitoring devices, which need to be embedded and arranged during the construction period and cannot be applied to the durability monitoring of concrete structures that are already in the service period. Moreover, they can only monitor the corrosion situation at local steel bars. Summary of the Invention

[0004] The present invention provides a durability monitoring device and method for reinforced concrete in a coastal environment to solve the technical problems mentioned in the background art.

[0005] To solve the above technical problems, the present invention includes the following technical solutions:

[0006] A durability monitoring device for reinforced concrete in a coastal environment includes a monitoring component, a reference component, and a potential monitoring member;

[0007] The monitoring component includes a monitoring mounting member and a plurality of monitoring electrodes. A plurality of receiving grooves one are spaced along the length direction on one side of the monitoring mounting member, and the monitoring electrodes are sequentially arranged in the receiving grooves one; the monitoring electrodes are signal-connected to the potential monitoring member;

[0008] The reference component includes a reference mounting member and a plurality of reference electrodes. A plurality of receiving grooves two are spaced along the length direction on one side of the reference mounting member, and the reference electrodes are sequentially arranged in the receiving grooves two; the reference electrodes are signal-connected to the potential monitoring member;

[0009] The potential monitoring member is used to measure the potential generated between the monitoring electrode and the reference electrode due to chloride ions, obtain the chloride ion concentration in the concrete around the monitoring electrode, and thus determine the aging degree and remaining durability years of the concrete around the monitoring electrode.

[0010] Further, the monitoring electrode is in the shape of a circular plate, the axis of the monitoring electrode is consistent with the length direction of the monitoring mounting member, and a part of the monitoring electrode is inserted into the accommodating groove one, and a part extends out of the surface of the monitoring mounting member.

[0011] Further, the reference electrode is in the shape of a circular plate, the axis of the reference electrode is consistent with the length direction of the reference mounting member, and a part of the reference electrode is inserted into the accommodating groove one, and a part extends out of the surface of the reference mounting member.

[0012] Further, an alignment connecting member is arranged on the outer sides of the monitoring mounting member and the reference mounting member;

[0013] Both ends of the alignment connecting member are fixedly connected to the monitoring mounting member and the reference mounting member respectively, so that the positions of the monitoring electrode and the reference electrode are opposite and the distance therebetween is determined.

[0014] Further, through cavities are respectively arranged at the central positions of the monitoring mounting member and the reference mounting member along the length direction.

[0015] Further, both the monitoring mounting member and the reference mounting member are provided with plastic shells.

[0016] Further, the monitoring electrode is made of the same material as the steel bars used in the in-service reinforced concrete structure.

[0017] Further, the reference electrode is a silver / silver chloride electrode.

[0018] Further, the potential monitoring member is a potentiometer.

[0019] Correspondingly, the present invention further provides a monitoring method for the durability of reinforced concrete in a coastal environment, which uses the monitoring device for the durability of reinforced concrete in a coastal environment for monitoring. The monitoring method includes the following steps:

[0020] Step 1: Before monitoring, monitoring mounting cavities one and two are drilled at intervals on the reinforced concrete to be monitored, and monitoring electrode cavities and reference electrode cavities are respectively drilled at one ends of the monitoring mounting cavities one and two that are close to each other;

[0021] Step 2: Both the monitoring electrode and the reference electrode are in contact with the reinforced concrete to be measured and perform monitoring, and can also transmit the monitoring data to the potential monitor;

[0022] Step 3: The potential monitoring member measures the potential generated between the monitoring electrode and the reference electrode due to chloride ions, and then obtains the chloride ion concentration existing in the concrete around the monitoring electrode, so as to obtain the aging degree and the remaining durability years of the concrete around the monitoring electrode.

[0023] Due to the adoption of the above technical solutions, the present invention has the following advantages and positive effects compared with the prior art: By arranging a plurality of monitoring electrodes on the current monitoring installation part and a plurality of reference electrodes on the reference installation part, making the quantity and positions of the monitoring electrodes and the reference electrodes correspond to each other, and using a potential monitoring part to monitor the potential generated between the monitoring electrodes and the reference electrodes due to chloride ions, the chloride ion concentration existing in the concrete around the monitoring electrodes can be obtained, thereby obtaining the aging degree and remaining durability years of the concrete around the monitoring electrodes. By arranging multiple groups of monitoring electrodes and reference electrodes, the monitoring results are more accurate. By arranging an alignment connecting part, it can ensure that the monitoring electrodes and the reference electrodes face each other exactly and the distance therebetween is determined, further improving the measurement accuracy. The monitoring installation cavity 1 and the monitoring installation cavity 2 are both round holes, the monitoring electrode cavity and the reference electrode cavity are both round holes, and the monitoring electrodes and the reference electrodes are both in the shape of round plates, which is easy for construction. The middle parts of the monitoring installation part and the reference installation part are respectively penetrated by cavities, which not only saves materials but also facilitates the installation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a perspective view of the monitoring device according to an embodiment of the present invention.

[0025] Figure 2 FIG. is a schematic application diagram of the monitoring device according to an embodiment of the present invention;

[0026] Figure 3 FIG. is a schematic cross-sectional view of the application state of the monitoring device according to an embodiment of the present invention.

[0027] The reference numerals in the figures are as follows:

[0028] 1, concrete to be monitored; 11, monitoring installation cavity 1; 12, monitoring installation cavity 2;

[0029] 2, monitoring assembly; 21, monitoring installation part; 22, monitoring electrode; 23, monitoring wire hole; 24, data transmission line 1;

[0030] 3, reference assembly; 31, reference installation part; 32, reference electrode; 33, reference wire hole; 34, data transmission line 2;

[0031] 4, potential monitoring part; 5, alignment connecting part; 6, bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following further describes in detail a durability monitoring device and method for reinforced concrete in a coastal environment provided by the present invention with reference to the accompanying drawings and specific embodiments. In combination with the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0033] Combined Figures 1 to 3 As shown, the durability monitoring device for reinforced concrete in a coastal environment provided in this embodiment is used to detect the durability of concrete 1. The monitoring device includes a monitoring component 2, a reference component 3, and a potential monitoring member 4.

[0034] The monitoring component 2 includes a monitoring mounting member 21 and a plurality of monitoring electrodes 22. On one side of the monitoring mounting member 21, a plurality of receiving grooves 1 are spaced apart along the length direction. The plurality of monitoring electrodes 22 are respectively fitted in the receiving grooves 1. A monitoring wire hole 23 is provided on the monitoring mounting member 21 along the length direction of the monitoring mounting member 21. The monitoring wire holes 23 are respectively communicated with the plurality of receiving grooves 1. The monitoring electrode 22 is connected to a first data transmission line 24. The first data transmission line 24 passes through the monitoring wire hole 23 to penetrate out of the monitoring mounting member 21 and is connected to the potential monitoring member 4.

[0035] The reference component 3 includes a reference mounting member 31 and a plurality of reference electrodes 32. On one side of the reference mounting member 31, a plurality of receiving grooves 2 are spaced apart along the length direction. The plurality of reference electrodes 32 are respectively fitted in the receiving grooves 2. A reference wire hole 33 is provided on the reference mounting member 31 along the length direction of the reference mounting member 31. The reference wire holes 33 are respectively communicated with the plurality of receiving grooves 2. The reference electrode 32 is connected to a second data transmission line 34. The second data transmission line 34 passes through the reference wire hole 33 to penetrate out of the reference mounting member 31 and is connected to the potential monitoring member 4.

[0036] The potential monitoring member 4 is used to measure the potential generated between the monitoring electrode 22 and the reference electrode 32 due to chloride ions.

[0037] Monitoring mounting cavities 11 and monitoring mounting cavities 12 are drilled at intervals on the concrete 1 to be monitored. Monitoring electrode cavities and reference electrode cavities are respectively drilled at one ends of the monitoring mounting cavities 11 and the monitoring mounting cavities 12 that are close to each other. The shape of the monitoring mounting cavity 11 matches the shape of the monitoring mounting member 21 for installing the monitoring mounting member 21; the shape of the monitoring mounting cavity 12 matches the shape of the reference mounting member 31 for installing the reference mounting member 31.

[0038] In a specific embodiment, both the monitoring electrode 22 and the reference electrode 32 are circular plate-shaped, both the monitoring mounting cavity 11 and the monitoring mounting cavity 12 are circular holes, and both the monitoring electrode cavity and the reference electrode cavity are circular holes.

[0039] In a specific embodiment, an alignment connecting member 5 is provided on the outer sides of the monitoring mounting member 21 and the reference mounting member 31. By way of example, the alignment connecting member 5 is in the shape of a square frame plate. The square frame plate is respectively fixed to the monitoring mounting member 21 and the reference mounting member 31 by two bolts 6, so that the ends of the monitoring mounting member 21 and the reference mounting member 31 are aligned and the spacing is fixed.

[0040] In a specific embodiment, cavities penetrate through the middle parts of the monitoring mounting member 21 and the reference mounting member 31 respectively.

[0041] In a specific embodiment, both the monitoring mounting member 21 and the reference mounting member 31 are plastic housings.

[0042] In a specific embodiment, the monitoring electrode 22 is a monitoring electrode 22 made of the same material as the steel bars used in the in-service reinforced concrete structure.

[0043] In a specific embodiment, the reference electrode 32 is a silver-silver chloride electrode.

[0044] In a specific embodiment, the potential monitoring member 4 is a potentiometer.

[0045] The principle of the present application is that when seawater chloride salts erode the reinforced concrete structure, chloride ions often penetrate into the reinforced concrete structure layer by layer. After the reinforced concrete structure durability monitoring device is inserted into the monitoring hole of the reinforced concrete structure, in order to monitor the chloride ions that penetrate into the reinforced concrete structure layer by layer, the reference electrode 32 and the monitoring electrode 22 are arranged opposite to each other and immersed in the chloride ion atmosphere. In this way, during the process of chloride ions penetrating layer by layer, the potential monitoring member 4 can measure the potential generated between the monitoring electrode 22 and the reference electrode 32 due to chloride ions, and then obtain the chloride ion concentration existing in the concrete around the monitoring electrode 22, thereby obtaining the aging degree and the remaining durability years of the concrete around the monitoring electrode 22.

[0046] Based on the above principle, the present application also provides a method for monitoring the durability of reinforced concrete in a coastal environment, including the following steps:

[0047] Step 1: Before monitoring, monitoring installation cavity 11 and monitoring installation cavity 12 are drilled at intervals on the reinforced concrete to be monitored. Monitoring electrode cavities and reference electrode cavities are also drilled at one end of monitoring installation cavity 11 and monitoring installation cavity 12 that are close to each other; the two cavities can be located between concretes or between steel bars, so the durability conditions in different structural situations can be comprehensively monitored, and several groups of monitoring electrodes 22 and reference electrodes 32 can be set to monitor the durability conditions at different levels;

[0048] Step 2: Both the monitoring electrode 22 and the reference electrode 32 are in contact with the reinforced concrete to be measured for monitoring, and the monitoring data can be transmitted to a potential monitor.

[0049] Step 3: The potential monitoring member 4 can measure the potential generated between the monitoring electrode 22 and the reference electrode 32 due to chloride ions, and then obtain the chloride ion concentration existing in the concrete around the monitoring electrode 22, thereby obtaining the aging degree and the remaining durability years of the concrete around the monitoring electrode 22.

[0050] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0051] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A coastal environment reinforced concrete durability monitoring device, characterized in that: It includes a monitoring component, a reference component, and a potential monitoring device; The monitoring component includes a monitoring installation part and a number of monitoring electrodes. Along one side of the monitoring installation part, a number of first accommodation grooves are spaced apart in the length direction, and the monitoring electrodes are sequentially arranged in the first accommodation grooves; the monitoring electrodes are signal-connected to the potential monitoring device; The reference component includes a reference installation part and a number of reference electrodes. Along one side of the reference installation part, a number of second accommodation grooves are spaced apart in the length direction, and the reference electrodes are sequentially arranged in the second accommodation grooves; the reference electrodes are signal-connected to the potential monitoring device; The potential monitoring device is used to measure the potential generated between the monitoring electrode and the reference electrode due to chloride ions, obtain the chloride ion concentration in the concrete around the monitoring electrode, so as to determine the aging degree and remaining durability years of the concrete around the monitoring electrode.

2. The durability monitoring device for reinforced concrete in a coastal environment according to claim 1, characterized in that The monitoring electrode is in the shape of a circular plate, the axis of the monitoring electrode is consistent with the length direction of the monitoring installation part, part of the monitoring electrode is inserted into the first accommodation groove, and part of it extends out of the surface of the monitoring installation part.

3. The durability monitoring device for reinforced concrete in a coastal environment according to claim 2, characterized in that The reference electrode is in the shape of a circular plate, the axis of the reference electrode is consistent with the length direction of the reference installation part, part of the reference electrode is inserted into the first accommodation groove, and part of it extends out of the surface of the reference installation part.

4. The durability monitoring device for reinforced concrete in a coastal environment according to claim 1, characterized in that Alignment connecting pieces are arranged on the outer sides of the monitoring installation part and the reference installation part; Both ends of the alignment connecting piece are fixedly connected to the monitoring installation part and the reference installation part respectively, so that the positions of the monitoring electrode and the reference electrode are opposite and the distance is determined.

5. The durability monitoring device for reinforced concrete in a coastal environment according to claim 1, characterized in that Through cavities are respectively arranged at the central positions of the monitoring installation part and the reference installation part along the length direction.

6. The durability monitoring device for reinforced concrete in a coastal environment according to claim 1, characterized in that Both the monitoring installation part and the reference installation part are provided with plastic shells.

7. The durability monitoring device for reinforced concrete in a coastal environment according to claim 1, characterized in that The monitoring electrode is made of the same material as the steel bars used in the in-service reinforced concrete structure.

8. The durability monitoring device for reinforced concrete in a coastal environment according to claim 1, characterized in that The reference electrode is a silver-silver chloride electrode.

9. The durability monitoring device for reinforced concrete in a coastal environment according to claim 1, characterized in that The potential monitoring device is a potentiometer.

10. A method for monitoring the durability of reinforced concrete in a coastal environment, characterized in that, Using the durability monitoring device for reinforced concrete in a coastal environment according to any one of claims 1 to 9 for monitoring, the monitoring method includes the following steps: Step 1: Before monitoring, monitoring installation cavities 1 and 2 are drilled at intervals on the reinforced concrete to be monitored. Monitoring electrode cavities and reference electrode cavities are also respectively drilled at one ends of the monitoring installation cavities 1 and 2 that are close to each other; Step 2: Both the monitoring electrode and the reference electrode are in contact with the reinforced concrete to be measured and implement monitoring, and the monitoring data can also be transmitted to the potential monitor; Step 3: The potential monitoring component measures the potential generated between the monitoring electrode and the reference electrode due to chloride ions, thereby obtaining the chloride ion concentration in the concrete around the monitoring electrode, and thus obtaining the aging degree and remaining service life of the concrete around the monitoring electrode.

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