Self-sensing cement-based sensor mounting structure embedded in concrete pipeline

Abstract

The utility model relates to the technical field of cement-based sensor installation, and discloses a self-sensing cement-based sensor installation structure embedded in a concrete pipeline, which comprises a self-sensing cement-based sensor mold, fresh self-sensing mortar, a reinforcement cage, a pipeline inner mold and a pipeline outer mold, a self-sensing cement-based sensor mold is mounted in a reinforcement cage, so that a self-sensing cement-based sensor can be positioned at a specified position in advance, and the limitation that the self-sensing cement-based sensor can only be embedded into an opening surface (top surface) of a vibrated concrete member is solved. Therefore, the self-sensing cement-based sensor can be embedded into any part of the concrete structure / component, and the flexibility and accuracy of the installation of the self-sensing cement-based sensor are improved. Besides, the mode that the self-sensing cement-based sensor mold is assembled by hardboards is adopted, so that the self-sensing cement-based sensor mold is easy to manufacture, low in cost and convenient to quickly mount and dismount on a construction site.

Description

Technical Field

[0001] This utility model belongs to the field of cement-based sensor installation technology, specifically relating to a self-sensing cement-based sensor installation structure embedded in a concrete pipe. Background Technology

[0002] Reinforced concrete pipes are widely used in municipal underground pipeline networks due to their advantages such as simple preparation, low cost, good durability, and long service life. However, considering the complex load environment underground, reinforced concrete pipes inevitably suffer from a series of defects such as cracks, corrosion, and disconnection, leading to reduced load-bearing capacity and leakage of internal liquids. Visual inspection of underground reinforced concrete pipes is difficult, and excavation is often time-consuming and costly. Therefore, finding an accurate and efficient damage monitoring method for risk analysis and maintenance of underground reinforced concrete pipes is crucial. Currently, concrete pipe damage monitoring technologies have been developed, such as sensing fiber optics, acoustic emission, piezoelectric ceramics, and conductive copper strips. However, these technologies are difficult to use for large-scale, long-term real-time monitoring of underground concrete pipes. Self-sensing cement-based sensors, being made of the same cement-based material as the pipe, are low-cost and have similar durability to the monitored material (concrete), enabling damage assessment and real-time monitoring throughout the entire lifecycle of concrete pipes.

[0003] However, there is currently no technology for embedding self-sensing cement-based sensors into concrete structures / components. Researchers typically embed self-sensing cement-based sensors directly into the vibrated concrete structure / component or directly bind them to the reinforcing cage. However, the former only allows embedding the sensor on the opening surface (top surface) of the concrete mold, not in other parts of the concrete structure / component. The latter method is problematic because self-sensing cement-based sensors are brittle, making it difficult to bind them intact to the reinforcing cage and to a specific location. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned problems and provide an installation structure for a self-sensing cement-based sensor embedded in a concrete pipe. This structure allows the self-sensing cement-based sensor to be pre-cast in a reinforcing cage and to be embedded securely and intact in the designated position.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides an installation structure for a self-sensing cement-based sensor embedded in a concrete pipe, including a self-sensing cement-based sensor mold, fresh self-sensing mortar, and a reinforcing cage. The self-sensing cement-based sensor mold includes a side mold, a bottom mold, an inner mold, and an outer mold, and the bottom mold has several holes.

[0007] The steel cage includes longitudinal bars and stirrups, and the holes pass through the longitudinal bars of the steel cage;

[0008] The outer mold has two slits, and an electrode mesh is installed in the slits. The mold of the self-sensing cement-based sensor is filled with fresh self-sensing mortar, and the fresh self-sensing mortar and the electrode mesh form a self-sensing cement-based sensor.

[0009] A further improvement of this invention is that the side mold, bottom mold, inner mold, and outer mold are bonded together with powder and glue to form a self-sensing cement-based sensor mold.

[0010] A further improvement of this invention is that the self-sensing cement-based sensor mold is bonded to the longitudinal reinforcement using powder and glue.

[0011] A further improvement of this invention is that the particle size of the powder is 70-120 mesh.

[0012] A further improvement of this utility model is that a layer of paper is provided on the inner side of both the inner mold and the outer mold.

[0013] A further improvement of this invention is that the width of the gap is 1.5~3mm.

[0014] A further improvement of this invention is that the side mold is made of cardboard, and there are two side molds.

[0015] A further improvement of this invention is that the bottom mold is made of cardboard.

[0016] A further improvement of this utility model is that stirrups are tied to the outside of the longitudinal bars, and a plurality of longitudinal bars and stirrups are provided.

[0017] A further improvement of this utility model is that the inner and outer sides of the self-sensing cement-based sensor are respectively fitted with an inner pipe mold and an outer pipe mold, and fresh concrete is filled between the inner pipe mold and the outer pipe mold to form a reinforced concrete pipe.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention provides an installation structure for a self-sensing cement-based sensor embedded in a concrete pipe. By installing a self-sensing cement-based sensor mold within the reinforcing cage, the sensor can be pre-positioned at a designated location, overcoming the limitation that it can only be embedded on the open surface (top surface) of the concrete component after vibration. This allows the self-sensing cement-based sensor to be embedded in any part of the concrete structure / component, improving the flexibility and accuracy of its installation. Furthermore, the use of cardboard assembly molds is not only simple and inexpensive to manufacture, but also facilitates rapid installation and disassembly on the construction site.

[0020] Furthermore, a layer of paper is placed on the inner side of both the inner and outer molds. This paper serves as an isolation layer, facilitating the demolding of the self-sensing cement-based sensor and the subsequent installation of the pipeline mold. After steam curing, the paper is prone to moisture absorption, making it easier for the paper to detach from the self-sensing cement-based sensor mold and the sensor itself, thus achieving the effect of convenient demolding. The presence of a paper layer on the inner side of both the inner and outer molds makes the size of the self-sensing cement-based sensor smaller than its theoretical size, further facilitating the subsequent installation of the pipeline mold.

[0021] Furthermore, the self-sensing cement-based sensor mold is bonded to the longitudinal reinforcement using powder and glue. The mixture of powder and glue forms a strong adhesive force, firmly bonding the self-sensing cement-based sensor mold to the longitudinal reinforcement. This prevents the self-sensing cement-based sensor mold from shifting or falling off during the pouring of fresh self-sensing mortar, ensuring the accuracy and reliability of the self-sensing cement-based sensor's position. Attached Figure Description

[0022] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the present invention and do not specifically limit the shapes and proportions of the components of the present invention.

[0023] Figure 1 This is a schematic diagram of the structure of the self-sensing cement-based sensor mold of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the reinforcing steel cage of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the mold for installing the self-sensing cement-based sensor of this utility model.

[0026] Figure 4 This is a schematic diagram of the structure of the tie-end stirrup of this utility model;

[0027] Figure 5This is a schematic diagram of the self-sensing cement-based sensor for pouring according to the present invention.

[0028] Figure 6 This is a schematic diagram of the self-sensing cement-based sensor demolding structure of this utility model;

[0029] Figure 7 This is a schematic diagram of the assembly pipe mold of this utility model;

[0030] Figure 8 This is a schematic diagram of the structure of the casting pipe of this utility model;

[0031] Figure 9 This is a schematic diagram of the pipe demolding structure of this utility model.

[0032] Among them: 1. Side mold; 2. Bottom mold; 3. Inner mold; 4. Outer mold; 5. Gap; 6. Paper sheet; 7. Electrode mesh; 8. Longitudinal reinforcement; 9. Stirrup; 10. Self-sensing cement-based sensor mold; 11. Fresh self-sensing mortar; 12. Self-sensing cement-based sensor; 13. Pipe inner mold; 14. Pipe outer mold; 15. Fresh concrete; 16. Reinforced concrete pipe. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The present invention will now be described in further detail with reference to the accompanying drawings:

[0040] like Figures 1 to 3 As shown, this utility model provides an installation structure for a self-sensing cement-based sensor embedded in a concrete pipe, including a side mold 1, a bottom mold 2, an inner mold 3, an outer mold 4, a gap 5, a paper sheet 6, an electrode mesh 7, longitudinal reinforcement 8, and stirrups 9. The two side molds 1, the bottom mold 2, the inner mold 3, and the outer mold 4 are bonded together with 502 glue to form a self-sensing cement-based sensor mold 10, and powder is used to fill the gaps in the self-sensing cement-based sensor mold 10 caused by cutting errors. In order to facilitate the demolding of the self-sensing cement-based sensor 12 and the subsequent installation of the pipe mold, a layer of paper sheet 6 is provided on the inner side of both the inner mold 3 and the outer mold 4.

[0041] As a preferred option, both the side mold 1 and the bottom mold 2 are made of cardboard.

[0042] As a preferred option, both the inner mold 3 and the outer mold 4 are made of rigid pipe material that matches the curvature of the inner mold 13 and the outer mold 14 of the pipe.

[0043] As a preferred option, the inner mold 3 and the outer mold 4 are made by cutting PVC pipes.

[0044] As a preferred option, the particle size of the powder is 70-12 mesh.

[0045] It should be noted that paper sheets 6 may be set on the inner side of the inner and outer molds, as long as they can facilitate the demolding of the self-sensing cement-based sensor cast on the reinforcing cage.

[0046] like Figure 2 As shown, the steel cage includes longitudinal bars 8 and stirrups 9. Stirrups 9 are tied to the outside of the longitudinal bars 8, and there are several of both longitudinal bars 8 and stirrups 9.

[0047] The bottom mold 2 of the self-sensing cement-based sensor mold 10 has several holes that pass through the longitudinal ribs 8. The outer mold of the self-sensing cement-based sensor mold 10 has two slits 5. The length of the slits 5 is slightly less than the thickness of the self-sensing cement-based sensor 12, and the width is 1.5~3mm. An electrode mesh 7 is set inside the slits 5, and the electrode mesh 7 is just locked inside the slits 5.

[0048] like Figure 3 As shown, the self-sensing cement-based sensor mold 10 is bonded to the longitudinal reinforcement 8 by powder and glue. The powder and glue can form a strong adhesive force after mixing, which firmly bonds the self-sensing cement-based sensor mold 10 to the longitudinal reinforcement 8. This can prevent the self-sensing cement-based sensor mold 10 from shifting or falling off during the pouring of fresh self-sensing mortar 11, and ensure the accuracy and reliability of the position of the self-sensing cement-based sensor 12.

[0049] It should be noted that the number of self-sensing cement-based sensor molds 10 bonded to the longitudinal reinforcement 8 can be several, and the bonding positions are not fixed.

[0050] like Figure 5 and Figure 6 As shown, the interior of the self-sensing cement-based sensor mold 10 is filled with fresh self-sensing mortar 11, and the fresh self-sensing mortar 11 and the electrode mesh 7 form a self-sensing cement-based sensor 12.

[0051] like Figures 7 to 9 As shown, the inner and outer parts of the self-sensing cement-based sensor 12 are respectively fitted with an inner pipe mold 13 and an outer pipe mold 14. Fresh concrete 15 is filled between the inner pipe mold 13 and the outer pipe mold 14 to form a reinforced concrete pipe 16.

[0052] This utility model also provides a method for installing a self-sensing cement-based sensor embedded in a concrete pipe, including the following steps:

[0053] Step 1: Cut out the side mold 1 and bottom mold 2 of the self-sensing cement-based sensor mold 10 from cardboard. The bottom mold 2 has holes for the longitudinal ribs 8 to pass through. Use PVC pipe to form the inner mold 3 and outer mold 4 of the self-sensing cement-based sensor mold 10. Make two slits 5 on the outer mold 4, with a length slightly smaller than the thickness of the self-sensing cement-based sensor 12 and a width of 1.5~3mm. Use glue to bond the side mold 1, bottom mold 2, inner mold 3 and outer mold 4 of the self-sensing cement-based sensor mold 10 together, and use powder to fill the holes in the self-sensing cement-based sensor mold 10 caused by cutting errors. Cover the inside of the inner mold 3 and outer mold 4 with a layer of paper 6, and then pass the electrode mesh 7 through the slits 5 reserved in the outer mold 4. Use double-sided tape to attach the bottom of the electrode mesh 7 to the paper 6 of the inner mold 3.

[0054] Step 2: Tie the longitudinal bars 8 and stirrups 9 with tie wire to form a steel cage;

[0055] Step 3: Pass the pre-drilled hole on the bottom mold 2 of the self-sensing cement-based sensor mold 10 through the longitudinal reinforcement 8 of the steel cage, and use powder and glue to bond the self-sensing cement-based sensor mold 10 to the designated position of the longitudinal reinforcement 8.

[0056] Step 4: Tie the end stirrups 9 with wire to form a complete steel cage;

[0057] Step 5: Pour the mixed fresh self-sensing mortar 11 into the self-sensing cement-based sensor mold 10 and vibrate it on the vibrating table.

[0058] Step 6: After the fresh self-sensing mortar 11 has hardened, demold it and then steam it at 50~70℃ for 3~5 days to obtain the self-sensing cement-based sensor 12.

[0059] Step 7: Stack the two electrode meshes 7 of each self-sensing cement-based sensor 12 together so as not to interfere with the assembly of the pipe mold;

[0060] Step 8: Insert the inner mold 13 and the outer mold 14 of the pipe into the inside and outside of the cured self-sensing cement-based sensor 12, respectively, and pour fresh concrete 15 between the inner mold 13 and the outer mold 14 of the pipe and vibrate it.

[0061] Step 9: After the fresh concrete 15 has hardened, demold it, clean the concrete from the two electrode meshes 7 on the self-sensing cement-based sensor 12, unfold the stacked electrode meshes 7, and then perform pipe curing to finally obtain the reinforced concrete pipe 16 embedded with the self-sensing cement-based sensor 12.

[0062] Example 1

[0063] This embodiment provides a method for installing a self-sensing cement-based sensor embedded in a concrete pipe, including the following steps:

[0064] Step 1: Cut out the side mold 1 and bottom mold 2 of the self-sensing cement-based sensor mold 10 from cardboard. Two holes for inserting the longitudinal ribs 8 are reserved on the bottom mold 2. Use PVC pipe to form the inner mold 3 and outer mold 4 of the self-sensing cement-based sensor mold 10. Make two slits 5 with a length of 25mm and a width of 2mm on the outer mold 4. Use 502 glue to bond the side mold 1, bottom mold 2, inner mold 3 and outer mold 4 of the self-sensing cement-based sensor mold 10 together, and use powder to fill the holes in the self-sensing cement-based sensor mold 10 caused by cutting errors. Cover the inner side of the inner mold 3 and outer mold 4 with a layer of A4 folded paper 6, and then pass the electrode mesh 7 through the reserved slits 5 of the outer mold 4. Use double-sided tape to attach the bottom of the electrode mesh 7 to the paper 6 of the inner mold 3.

[0065] Step 2: Tie the longitudinal bars 8 and stirrups 9 with tie wire to form a steel cage;

[0066] Step 3: Pass the two pre-drilled holes on the bottom mold 2 of the self-sensing cement-based sensor mold 10 through the two longitudinal bars 8 of the steel cage, and use powder and 502 glue to bond the self-sensing cement-based sensor mold 10 to the designated position of the longitudinal bars 8.

[0067] Step 4: Tie the end stirrups 9 with wire to form a complete steel cage;

[0068] Step 5: Pour the mixed fresh self-sensing mortar 11 into the self-sensing cement-based sensor mold 10 and vibrate it on the vibrating table.

[0069] Step 6, repeat steps 3-5 until four self-sensing cement-based sensor molds 10 are bonded to both the upper and lower parts of the steel cage.

[0070] Step 7: After the fresh self-sensing mortar 11 has hardened, demold it and then steam it at 60℃ for 3 days to obtain a self-sensing cement-based sensor 12 with a thickness of 30mm.

[0071] Step 8: Stack the two electrode meshes 7 of each self-sensing cement-based sensor 12 together so as not to interfere with the assembly of the pipe mold;

[0072] Step 9: Insert the inner mold 13 and the outer mold 14 of the pipe into the inside and outside of the cured self-sensing cement-based sensor 12, respectively, and pour fresh concrete 15 between the inner mold 13 and the outer mold 14 of the pipe and vibrate it.

[0073] Step 10: After the fresh concrete 15 has hardened, demold it, clean the concrete from the two electrode meshes 7 on the self-sensing cement-based sensor 12, unfold the stacked electrode meshes 7, and then perform pipe curing to finally obtain the reinforced concrete pipe 16 embedded with the self-sensing cement-based sensor 12.

[0074] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed utility model subject matter.

[0075] The above content provides a further detailed description of this utility model. It should not be considered that the specific embodiments of this utility model are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the scope of protection of this utility model as defined by the submitted claims.

Claims

1. A self-sensing cement-based sensor mounting structure embedded in a concrete pipe, characterized in that, The self-sensing cement-based sensor mold (10), fresh self-sensing mortar (11) and steel cage are included. The self-sensing cement-based sensor mold (10) includes a side mold (1), a bottom mold (2), an inner mold (3) and an outer mold (4). The bottom mold (2) has several holes. The steel cage includes longitudinal bars (8) and stirrups (9), and the hole passes through the longitudinal bars (8) of the steel cage. Two slits (5) are provided on the outer mold (4), and an electrode mesh (7) is provided in the slits (5). The self-sensing cement-based sensor mold (10) is filled with fresh self-sensing mortar (11), and the fresh self-sensing mortar (11) and the electrode mesh (7) form a self-sensing cement-based sensor (12). The side mold (1), bottom mold (2), inner mold (3) and outer mold (4) are bonded together with powder and glue to form a self-sensing cement-based sensor mold (10); the self-sensing cement-based sensor mold (10) is bonded to the longitudinal reinforcement (8) with powder and glue.

2. The self-sensing cement-based sensor installation structure embedded in a concrete pipe according to claim 1, characterized in that, The particle size of the powder is 70-120 mesh.

3. The self-sensing cement-based sensor installation structure embedded in a concrete pipe according to claim 1, characterized in that, A layer of paper (6) is provided on the inner side of both the inner mold (3) and the outer mold (4).

4. The self-sensing cement-based sensor installation structure embedded in a concrete pipe according to claim 1, characterized in that, The width of the gap (5) is 1.5~3mm.

5. The self-sensing cement-based sensor installation structure embedded in a concrete pipe according to claim 1, characterized in that, The side mold (1) is made of cardboard, and there are two side molds (1).

6. The self-sensing cement-based sensor installation structure embedded in a concrete pipe according to claim 1, characterized in that, The bottom mold (2) is made of cardboard.

7. The self-sensing cement-based sensor installation structure embedded in a concrete pipe according to claim 1, characterized in that, The longitudinal reinforcement (8) is bound with stirrups (9) on the outside, and there are several of both the longitudinal reinforcement (8) and the stirrups (9).

8. The self-sensing cement-based sensor installation structure embedded in a concrete pipe according to claim 1, characterized in that, The self-sensing cement-based sensor (12) is fitted with an inner pipe mold (13) and an outer pipe mold (14) inside and outside, respectively. Fresh concrete (15) is filled between the inner pipe mold (13) and the outer pipe mold (14) to form a reinforced concrete pipe (16).

Images