In-situ monitoring device and monitoring method for corrosion and stress states of existing building steel bars

Abstract

The invention discloses an existing building steel bar corrosion and stress state in-situ monitoring device and method, and relates to the technical field of building structure detection.The existing building steel bar corrosion and stress state in-situ monitoring device comprises a building body, pre-buried stressed steel bars exist in the building body, and a corrosion monitoring mechanism is pre-buried in the building body; the corrosion monitoring mechanism comprises a corrosion detection assembly, the corrosion detection assembly is pre-buried in the building body, a stressed steel bar in the building body corresponds to the corrosion detection assembly, a fixing assembly is arranged on the outer side of the corrosion detection assembly, and the fixing assembly is connected with the corrosion detection assembly. A stress sensing assembly is arranged in the fixing assembly, and the stress sensing assembly corresponds to a stressed steel bar in the building body. The corrosion state of the load-bearing steel bar is monitored in real time through the corrosion detection assembly and the stress sensing assembly, the state of the load-bearing steel bar in a building is monitored and prevented in real time, and therefore building facilities are effectively and safely treated.

Description

Technical Field

[0001] The present application relates to the technical field of building structure detection, and in particular to an in-situ monitoring device and method for corrosion and stress state of existing building reinforcement. Background Art

[0002] Reinforced concrete is one of the most widely used structural forms in the engineering field. It gives full play to the compressive strength of concrete and the tensile strength of steel bars, and there is good bonding between concrete and steel bars. In addition, the concrete wrapped around the outside of the steel bars can protect the steel bars from rust, effectively combining the two materials together.

[0003] Steel bar corrosion has become the main factor affecting the reduction of its mechanical properties and durability. If steel bar corrosion can be detected in time and corresponding preventive measures can be taken, it can greatly reduce or even avoid huge economic losses and ensure everyone's travel safety. At present, most steel bar corrosion monitoring is done manually through detection instruments to periodically detect steel bar corrosion in building facilities. It is impossible to detect the degree of steel bar corrosion in time, which poses certain safety hazards.

[0004] With respect to the above-mentioned related technologies, the inventors believe that it is impossible to timely detect the degree of steel corrosion in buildings in real time and to carry out timely safety treatment of building facilities. Summary of the invention

[0005] The purpose of this application is to provide an in-situ monitoring device and method for the corrosion and stress state of existing building steel bars, so as to improve the problem of being unable to timely detect the degree of steel bar corrosion in the building and to carry out timely safety treatment of building facilities.

[0006] The present application provides an in-situ monitoring device for corrosion and stress state of existing building steel bars, which adopts the following technical solution: An in-situ monitoring device for corrosion and stress state of existing building steel bars, comprising a building body, wherein pre-buried stressed steel bars are present in the building body, a corrosion monitoring mechanism is pre-buried in the building body, the corrosion monitoring mechanism comprises a corrosion detection component, the corrosion detection component is pre-buried in the building body, the stressed steel bars in the building body correspond to the corrosion detection component, a fixing component is arranged on the outside of the corrosion detection component, the fixing component is connected to the corrosion detection component, a stress sensing component corresponding to the corrosion detection component is arranged in the fixing component, and the stress sensing component corresponds to the stressed steel bars in the building body.

[0007] By adopting the above technical scheme, a corrosion detection mechanism is set on the stressed steel bars in the building body, and the corrosion monitoring mechanism is pre-buried in the building body. The corrosion degree of the stressed steel bars is monitored in real time by the corrosion detection component in the corrosion monitoring mechanism, and the stress generated by the expansion of the stressed steel bars after corrosion is monitored in real time by the stress sensing component, so as to conduct a safety inspection on the state of the stressed steel bars in the building body and the corrosion degree of the steel bars in the building, thereby effectively conducting a safety treatment on the building facilities.

[0008] Optionally, the rust detection component includes a rust detection part, a rust detection probe connected to the rust detection part contacts the stressed steel bar in the building body, the rust detection part is externally connected to the fixing component, a signal collector is provided on the outer wall of the building body, the signal collector is electrically connected to the rust detection probe, and a mounting bracket is provided on the outer wall of the building body, the mounting bracket is connected to the signal collector.

[0009] By adopting the above technical scheme, the rust detection part is set on the fixed component set in the building body, and the rust detection part is contacted with the stressed steel bars through the rust detection part, so as to perform real-time detection of the rust degree of the stressed steel bars embedded in the building body. After the rust state of the stressed steel bars exceeds the safety threshold, workers can promptly reinforce the building for safety according to the measured data to avoid damage to building facilities due to steel bar corrosion as much as possible.

[0010] Optionally, the fixing component includes a protective box body, a connecting groove is provided on the side wall of the protective box body, the connecting groove corresponds to the stressed steel bar, the protective box body includes two protective cover shells, the outer side walls of the protective cover shells are in contact with the stressed steel bar, the rust detection part is arranged in the protective cover shell, a connecting groove is provided on the side of the protective cover shells close to each other, the connecting grooves after the two protective cover shells are connected constitute a connecting groove, a connecting rod is provided on the outer side wall of the protective cover shell, the connecting rod is in contact with the outer side wall of the building body, and the wires of the rust detection part pass through the protective cover shells and are electrically connected to the signal collector along the connecting rod.

[0011] By adopting the above technical scheme, two protective cover shells are used to form a protective box body, which is easy to install. The protective cover shells are fixed on the transverse stress-bearing steel bars so that the connecting grooves on the protective cover shells are in contact with the stress-bearing steel bars. The rust detection piece is set in the protective cover shell, and another protective cover shell is spliced ​​with the protective cover shell to form a protective box body to isolate the concrete, reduce the influence of the concrete on the rust detection piece, and use connecting rods to lead the wires of the rust detection piece out of the building body to reduce the possibility of breaking the wires when pouring concrete.

[0012] Optionally, a support frame is provided on the inner wall of the protective cover shell, a fixing groove 1 is provided on one end of the support frame close to the rust detection part, the inner wall of the fixing groove 1 is in contact with the side wall of the rust detection part, a fixing groove 2 is provided on the side where the two protective cover shells are close to each other, and a sealing part 1 is provided in the fixing groove 2.

[0013] By adopting the above technical scheme, the support frame is arranged in the protective cover shell to support the rust detection piece through a pair of fixed grooves opened on the support frame, so as to prevent the rust detection piece from moving in the protective cover shell when pouring concrete and affecting the rust detection piece. By setting a sealing piece between the two protective cover shells, the possibility of concrete entering the protective cover shells is reduced. At the same time, the rust detection piece can normally monitor the corrosion state of the stressed steel bars. When the corrosion of the rusted steel bars in the building body exceeds the safety threshold, the building body is safely reinforced.

[0014] Optionally, the stress sensing component includes a stress sensor, a stress detection probe is arranged on the side of the stress sensor close to the stressed steel bar, the stress detection probe is against the side wall of the stressed steel bar, the stress sensor is located in the protective cover shell and corresponds to the support frame, the support frame is provided with a fixing groove three, the stress sensor is arranged in the fixing groove three on the support frame, the stress sensor and the rust detection component are located on the same protective cover shell, and the wire of the stress sensor is electrically connected to the signal collector through the connecting rod.

[0015] By adopting the above technical scheme, the stress sensor is set in the fixing groove three opened on the support frame in the protective cover shell, and the stress sensor is fixed, which reduces the possibility of the stress detection probe of the stress sensor being misaligned with the stressed steel bar during the pouring process, improves the stability of the stress sensor in monitoring the stress state of the stressed steel bar after corrosion, and monitors the stress state of the stressed steel bar in real time through the stress sensor. When the stress state of the steel bar exceeds the normal situation, the building body is immediately reinforced for safety to reduce the risk of damage to the building body.

[0016] Optionally, an elastic part is provided at one end of the stress detection probe close to the stress sensor, and the elastic part is connected to a side of the stress sensor close to the stressed steel bar. A stop block is provided at one end of the stress detection probe close to the stressed steel bar, and the elastic part abuts against the side wall of the stop block. A limiting groove corresponding to the side wall of the stressed steel bar is provided on the stop block.

[0017] By adopting the above technical solution, through the elastic part arranged between the stress detection probe and the stress sensor, the stopper arranged on the stress detection probe is always against the side wall of the stressed steel bar, thereby improving the accuracy of the data of the stress state of the stressed steel bar measured by the stress sensor, and through the limit groove opened on the stopper, the possibility of the stress detection probe and the stressed steel bar being misaligned is further reduced.

[0018] Optionally, a connecting tube connected to the protective cover shell is provided on the side wall of the connecting rod, and the wires of the rust detection member and the stress sensor are led out along the inner wall of the connecting tube and electrically connected to the signal collector.

[0019] By adopting the above technical solution, the connecting pipe is arranged below the connecting rod, so as to further protect the wire of the corrosion monitoring mechanism and reduce the possibility of the wire breaking when pouring concrete.

[0020] Optionally, a second seal is provided in the connecting groove opened on the protective cover shell, and the second seal is in contact with the inner wall of the connecting groove. After the two protective cover shells are spliced ​​together, the second seal is in contact with the stressed steel bars.

[0021] By adopting the above technical scheme, after the two protective cover shells are spliced ​​and supported by the protective box body, the connecting groove composed of the connecting grooves is isolated to prevent concrete from flowing into the protective box body through the connecting groove, causing damage to the corrosion detection parts and stress sensors, affecting the data measured by the corrosion monitoring mechanism, and causing errors in the monitoring of the status of the stressed steel bars in the building body.

[0022] An in-situ monitoring method for corrosion and stress state of existing building steel bars comprises the following steps: After the stress-bearing steel bars of the building body are erected, the corrosion detection component and the stress sensing component are set on the stress-bearing steel bars through the fixing component, and the building body is poured with concrete, and the corrosion monitoring mechanism is pre-buried in the building body; After the building body is poured, the mounting frame is set on the outer wall of the building body, and the signal collector is set on the mounting frame and electrically connected to the corrosion monitoring mechanism embedded in the building body; The corrosion detection component in the corrosion monitoring mechanism monitors the corrosion degree of the stress-bearing steel bars in the building body in real time, the stress sensing component monitors the stress generated by the corrosion and expansion of the stress-bearing steel bars in the building body, and the signal collector collects the data signals detected by the corrosion monitoring mechanism; When the degree of corrosion of the stress-bearing steel bars in the building body exceeds the safety threshold, the building body needs to be handled safely immediately.

[0023] Optionally, the installation of an in-situ monitoring device for corrosion and stress state of existing building steel bars includes the following steps: The protective cover is fixed on the horizontal stressed steel bar so that the connection groove on the protective cover contacts the stressed steel bar, and the corrosion detection piece is fixed in a fixing groove 1 on the support frame in the protective cover so that the corrosion detection probe contacts the side wall of the stressed steel bar, which is convenient for the subsequent detection of the corrosion degree of the stressed steel bar; The stress sensor is arranged in the second fixing groove on the support frame in the protective cover shell, the stress detection probe of the stress sensor is against the side wall of the stressed steel bar, and the stopper fixed on the stress detection probe increases the contact area with the stressed steel bar through the limit groove, thereby improving the detection of the stress detection probe on the stress generated by the expansion of the stressed steel bar after corrosion; After the corrosion detection part and the stress sensor are installed, another protective cover is connected and fixed to the protective cover fixed on the stressed steel bar to prevent the poured concrete from damaging the corrosion monitoring mechanism; After the pouring of the building body is completed, the wires of the rust monitoring mechanism are led out of the building body through the connecting rods and connecting pipes fixed on the protective cover shell to prevent the wires from being broken during the pouring of the building body, so that the wires of the rust monitoring mechanism are electrically connected to the signal collector.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The corrosion detection part is set on the fixed component set in the building body, and the corrosion detection part is contacted with the stress-bearing steel bar through the corrosion detection part, so as to detect the corrosion degree of the stress-bearing steel bar embedded in the building body in real time. When the corrosion state of the stress-bearing steel bar exceeds the safety threshold, the workers can timely reinforce the building according to the measured data to avoid damage to the building facilities due to steel bar corrosion as much as possible; 2. Fix the protective cover shell on the horizontal stressed steel bar so that the connection groove on the protective cover shell contacts the stressed steel bar, set the corrosion detection piece in the protective cover shell, and use another protective cover shell to splice with the protective cover shell to form a protective box to isolate the concrete and reduce the impact of the concrete on the corrosion detection piece. Use a connecting rod to lead the wire of the corrosion detection piece out of the building body to reduce the possibility of breaking the wire when pouring concrete; 3. Set the stress sensor in the third fixing groove opened on the support frame in the protective cover shell to fix the stress sensor, reduce the possibility of the stress detection probe of the stress sensor being misaligned with the stressed steel bar during the pouring process, improve the stability of the stress sensor in monitoring the stress state of the stressed steel bar after corrosion, and monitor the stress state of the stressed steel bar in real time through the stress sensor. When the stress state of the steel bar exceeds the normal situation, the building body is immediately reinforced for safety to reduce the risk of damage to the building body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1The present invention is an overall schematic diagram of an in-situ monitoring device for corrosion and stress state of steel bars in existing buildings.

[0026] Figure 2 It is a partial cross-sectional view of the in-situ monitoring device for corrosion and stress state of building steel bars.

[0027] Figure 3 yes Figure 2 A partial enlarged view of middle A.

[0028] Figure 4 It is a partial schematic diagram of the in-situ monitoring device for corrosion and stress state of building steel bars.

[0029] Figure 5 yes Figure 4 A partial enlarged view of B.

[0030] In the figure, 1. building body; 11. stressed steel bar; 2. corrosion monitoring mechanism; 21. corrosion detection assembly; 211. corrosion detection part; 212. corrosion detection probe; 22. stress sensing assembly; 221. stress sensor; 222. stress detection probe; 223. elastic part; 224. block; 225. limit groove; 3. fixing assembly; 31. protective box; 311. protective cover shell; 32. connecting groove; 321. connecting groove; 313. support frame; 314. fixing groove one; 315. fixing groove three; 33. connecting rod; 34. fixing groove two; 35. seal one; 36. connecting pipe; 37. seal two; 4. signal collector; 5. mounting frame. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given. Example

[0032] An in-situ monitoring device for corrosion and stress state of existing building steel bars, referring to Figures 1 to 3, including a building body 1, in which stress-bearing steel bars 11 for supporting the building body 1 are pre-embedded, the stress-bearing steel bars 11 are staggeredly distributed in the building body 1 and connected and fixed to each other, a protection box 31 is pre-embedded in the building body 1, and the protection box 31 is composed of two protection shells 311, one of which is fixed to the stress-bearing steel bars 11 through a metal clamp, and the outer wall of the protection shell 311 is in contact with the stress-bearing steel bars 11; a support frame 313 is welded to the inner wall of the protection shell 311, the support frame 313 is evenly distributed in the protection shell 311, and a fixed Slot one 314, fix the rust detection piece 211 in the fixing slot one 314 on the support frame 313, and also open a fixing slot three 315 on the support frame 313, and fix the stress sensor 221 in the fixing slot three 315; the side wall of the protective cover shell 311 is opened with a connecting groove 321, and the inner wall of the connecting groove 321 contacts the side wall of the stressed steel bar 11, and the connecting grooves 321 on the two protective cover shells 311 form a connecting groove 32, which fixes the stressed steel bar 11, and the rust degree and stress state of the stressed steel bar 11 are monitored in real time through the detection piece in the protective cover shell 311.

[0033] Reference Figures 1 to 3 A metal connecting rod 33 is welded on the protective cover shell 311, and a hollow connecting pipe 36 is welded below the connecting rod 33. The connecting pipe 36 is connected and fixed to the side wall of the protective cover shell 311, and the wires of the detection instrument in the protective cover shell 311 are led out of the building body 1 through the connecting pipe 36; the metal mounting frame 5 is connected and fixed to the fastening bolts pre-buried on the building body 1 outside the building body 1, and the signal collector 4 is fixed to the mounting frame 5 with bolts, and the signal collector 4 is electrically connected to the wires of the rust detection part 211 and the stress sensor 221 in the protective cover shell 311, and the signals transmitted by the detection instrument are collected and analyzed.

[0034] Reference Figure 2 and Figure 3 A fixing groove 2 34 is provided on one side of the two protective cover shells 311 close to each other, and a sealing member 35 is placed in the fixing groove 2 34. The sealing member 35 is an isolation rubber pad. After the two protective cover shells 311 are fastened and fixed with bolts, the gap between the cabinet protective cover shells 311 is isolated to prevent concrete from entering. After the two protective cover shells 311 are fastened, the fixing groove 1 314 provided on the support frame 313 on the two protective cover shells 311 clamps and fixes the corrosion detection member 211, and the fixing groove 3 315 provided on the support frame 313 tightens and fixes the stress sensor 221; the corrosion detection member 211 is a steel bar corrosion detector, and the corrosion detection probe 212 connected to the corrosion detection member 211 contacts the side wall of the stressed steel bar 11 to monitor the degree of steel bar corrosion; the stress detection probe 222 arranged on the stress sensor 221 is against the side wall of the stressed steel bar 11 to monitor the stress state change of the steel bar in real time.

[0035] Reference Figures 2 to 5 A sealing member 37 is pasted in the connecting groove 321 of the protective cover shell 311 and contacts the side wall of the stressed steel bar 11. After the two protective cover shells 311 form a protective box body 31, the gap between the connecting groove 32 and the stressed steel bar 11 is blocked to prevent concrete from entering the protective box body 31 and affecting the detection instrument; an elastic member 223 is connected and fixed to the stress detection probe 222 of the stress sensor 221, and the elastic member 223 is a thrust spring. A metal stopper 224 is fixed to the end of the stress detection probe 222 close to the stressed steel bar 11 with a screw, and a limiting groove 225 corresponding to the stressed steel bar 11 is provided on the stopper 224 to improve the data accuracy of the stress state of the stressed steel bar 11 measured by the stress sensor 221. The limiting groove 225 provided on the stopper 224 reduces the possibility of the stress detection probe 222 and the stressed steel bar 11 being misaligned. Example

[0036] S100, after the stress-bearing steel bars 11 of the building body 1 are erected, the corrosion detection component 21 and the stress sensing component 22 are arranged on the stress-bearing steel bars 11 through the fixing component 3, and the building body 1 is poured with concrete, and the corrosion monitoring mechanism 2 is pre-buried in the building body 1; S110, fix the protective cover shell 311 on the horizontal stressed steel bar 11, so that the connecting groove 321 on the protective cover shell 311 contacts the stressed steel bar 11, fix the corrosion detection member 211 in the fixing groove 1 314 on the support frame 313 in the protective cover shell 311, and the corrosion detection probe 212 contacts the side wall of the stressed steel bar 11, so as to facilitate the subsequent detection of the corrosion degree of the stressed steel bar 11; S120, the stress sensor 221 is arranged in the fixing groove 2 34 on the support frame 313 in the protective cover shell 311, the stress detection probe 222 of the stress sensor 221 is against the side wall of the stressed steel bar 11, and the stopper 224 fixed on the stress detection probe 222 increases the contact area with the stressed steel bar 11 through the limit groove 225 provided, thereby improving the detection of the stress detection probe 222 on the stress generated by the expansion of the stressed steel bar 11 after corrosion; S130, after the corrosion detection member 211 and the stress sensor 221 are installed, another protective cover shell 311 is connected and fixed to the protective cover shell 311 fixed on the stressed steel bar 11 to prevent the poured concrete from damaging the corrosion monitoring mechanism 2; S200, after the pouring of the building body 1 is completed, the mounting frame 5 is installed on the outer wall of the building body 1, and the signal collector 4 is installed on the mounting frame 5, and is electrically connected to the corrosion monitoring mechanism 2 embedded in the building body 1; S210, after the pouring of the building body 1 is completed, the wires of the corrosion monitoring mechanism 2 are led out of the building body 1 through the connecting rod 33 and the connecting pipe 36 fixed on the protective cover shell 311 to prevent the wires from being broken during the pouring of the building body 1, so that the wires of the corrosion monitoring mechanism 2 are electrically connected to the signal collector 4.

[0037] S300, the corrosion degree of the stress-bearing steel bars 11 in the building body 1 is monitored in real time by the corrosion detection member 211 in the corrosion monitoring mechanism 2, the stress sensing component 22 monitors the stress generated by the corrosion and expansion of the stress-bearing steel bars 11 in the building body 1, and the signal collector 4 collects the data signal detected by the corrosion monitoring mechanism 2; S400: After the corrosion degree of the stress-bearing steel bars 11 in the building body 1 exceeds the safety threshold, the building body 1 needs to be immediately processed for safety.

[0038] The implementation principle of the embodiment of the present application is: The protective cover shell 311 is set on the stressed steel bar 11, so that another stressed steel bar 11 contacts the connecting groove 321 on the protective cover shell 311, and then the rust detection piece 211 and the stress sensor 221 are installed in the fixing groove on the support frame 313 in the protective cover shell 311, and then another protective cover shell 311 is fixed on the top of the protective cover shell 311, and the rust detection piece 211 and the stress sensor 221 are fixed through the fixing grooves opened on the support frames 313 of the two protective cover shells 311. The two protective cover shells 311 form a protective box body 31 to isolate the concrete; after the pouring of the building body 1 is completed, the rust detection piece 211 and the stress sensor 221 are installed. 1 respectively monitors the corrosion degree and stress state of the stressed steel bars 11 in real time, sends the measured data to the data collector through the wire for analysis and processing, and the staff judges the corrosion degree of the stressed steel bars 11 according to the data collected in the data collector. When the corrosion degree of the stressed steel bars 11 exceeds the safety threshold, the building facilities are immediately reinforced for safety; the stressed steel bars 11 are monitored in real time by the corrosion detection parts 211 and the stress sensors 221 pre-buried in the building body 1, so that the steel bars of the building body 1 can be continuously detected for a long time, and the state of the stressed steel bars 11 in the building can be monitored and prevented in real time, thereby effectively handling the building facilities for safety.

[0039] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An in-situ monitoring device for corrosion and stress state of existing building steel bars, comprising a building body (1), wherein pre-buried stress-bearing steel bars (11) are present in the building body (1), and characterized in that: A corrosion monitoring mechanism (2) is pre-embedded in the building body (1), the corrosion monitoring mechanism (2) comprising a corrosion detection component (21), the corrosion detection component (21) being pre-embedded in the building body (1), the stress-bearing steel bars (11) in the building body (1) corresponding to the corrosion detection component (21), a fixing component (3) being arranged outside the corrosion detection component (21), the fixing component (3) being connected to the corrosion detection component (21), a stress sensing component (22) corresponding to the corrosion detection component (21) being arranged in the fixing component (3), the stress sensing component (22) corresponding to the stress-bearing steel bars (11) in the building body (1).

2. The in-situ monitoring device for corrosion and stress state of existing building reinforcement according to claim 1, characterized in that: The corrosion detection component (21) comprises a corrosion detection part (211); a corrosion detection probe (212) connected to the corrosion detection part (211) contacts the stressed steel bar (11) in the building body (1); the corrosion detection part (211) is externally connected to the fixing component (3); a signal collector (4) is provided on the outer wall of the building body (1); the signal collector (4) is electrically connected to the corrosion detection probe (212); and a mounting frame (5) is provided on the outer wall of the building body (1); the mounting frame (5) is connected to the signal collector (4).

3. The in-situ monitoring device for corrosion and stress state of existing building reinforcement according to claim 2, characterized in that: The fixing assembly (3) comprises a protective box (31), a side wall of the protective box (31) is provided with a connection groove (32), the connection groove (32) corresponds to the stressed steel bar (11), the protective box (31) comprises two protective covers (311), the outer side walls of the protective covers (311) are in contact with the stressed steel bar (11), the rust detection element (211) is arranged in the protective covers (311), and the protective covers (311) are provided with a connection groove (32) on the side wall of the protective covers. ) are provided with a connecting groove (321) on one side close to each other, and the connecting groove (321) after the two protective cover shells (311) are connected forms a connecting groove (32), and the outer wall of the protective cover shell (311) is provided with a connecting rod (33), and the connecting rod (33) is in contact with the outer wall of the building body (1), and the wire of the rust detection part (211) passes through the protective cover shell (311) and is electrically connected to the signal collector (4) along the connecting rod (33).

4. The in-situ monitoring device for corrosion and stress state of existing building reinforcement according to claim 3 is characterized by: A support frame (313) is provided on the inner side wall of the protective cover shell (311); a fixing groove (314) is provided on one end of the support frame (313) close to the rust detection component (211); an inner side wall of the fixing groove (314) contacts the side wall of the rust detection component (211); a fixing groove (34) is provided on one side of the two protective cover shells (311) close to each other; a sealing component (35) is provided in the fixing groove (34).

5. The in-situ monitoring device for corrosion and stress state of existing building reinforcement according to claim 1, characterized in that: The stress sensing component (22) comprises a stress sensor (221). A stress detection probe (222) is arranged on a side of the stress sensor (221) close to the stressed steel bar (11). The stress detection probe (222) abuts against the side wall of the stressed steel bar (11). The stress sensor (221) is located in the protective cover shell (311) and corresponds to the support frame (313). A fixing groove three (315) is provided on the support frame (313). The stress sensor (221) is arranged in the fixing groove three (315) on the support frame (313). The stress sensor (221) and the rust detection component (211) are located on the same protective cover shell (311). The wire of the stress sensor (221) is electrically connected to the signal collector (4) through the connecting rod (33).

6. The in-situ monitoring device for corrosion and stress state of existing building reinforcement according to claim 5, characterized in that: An elastic member (223) is provided at one end of the stress detection probe (222) close to the stress sensor (221); the elastic member (223) is connected to a side of the stress sensor (221) close to the stressed steel bar (11); a stopper (224) is provided at one end of the stress detection probe (222) close to the stressed steel bar (11); the elastic member (223) abuts against a side wall of the stopper (224); and a limiting groove (225) corresponding to the side wall of the stressed steel bar (11) is provided on the stopper (224).

7. The in-situ monitoring device for corrosion and stress state of existing building reinforcement according to claim 3 is characterized by: The side wall of the connecting rod (33) is provided with a connecting pipe (36) connected to the protective cover shell (311), and the wires of the rust detection member (211) and the stress sensor (221) are led out along the inner wall of the connecting pipe (36) and electrically connected to the signal collector (4).

8. The in-situ monitoring device for corrosion and stress state of existing building reinforcement according to claim 3 is characterized by: A second seal (37) is provided in the connection groove (321) opened on the protective cover shell (311), and the second seal (37) is in contact with the inner wall of the connection groove (321). After the two protective cover shells (311) are spliced ​​together, the second seal (37) is in contact with the stressed steel bar (11).

9. An in-situ monitoring method for corrosion and stress state of existing building steel bars, characterized by: An in-situ detection device for corrosion and stress state of existing building steel bars comprising any one of claims 1 to 8, S100, after the stress-bearing steel bars (11) of the building body (1) are installed, the corrosion detection component (21) and the stress sensing component (22) are arranged on the stress-bearing steel bars (11) via the fixing component (3), and the building body (1) is poured with concrete, and the corrosion monitoring mechanism (2) is pre-buried in the building body (1); S200, after the building body (1) is cast, the mounting frame (5) is arranged on the outer wall of the building body (1), and the signal collector (4) is arranged on the mounting frame (5) to be electrically connected to the corrosion monitoring mechanism (2) pre-buried in the building body (1); S300, the corrosion degree of the stress-bearing steel bars (11) in the building body (1) is monitored in real time by the corrosion detection member (211) in the corrosion monitoring mechanism (2), the stress sensing component (22) monitors the stress generated by the corrosion and expansion of the stress-bearing steel bars (11) in the building body (1), and the signal collector (4) collects the data signal detected by the corrosion monitoring mechanism (2); S400: After the corrosion degree of the stress-bearing steel bars (11) in the building body (1) exceeds the safety threshold, the building body (1) needs to be immediately subjected to safety treatment.

10. The in-situ monitoring method for corrosion and stress state of existing building reinforcement according to claim 9, characterized in that: S110, fixing the protective cover shell (311) on the transverse stressed steel bar (11) so that the connecting groove (321) on the protective cover shell (311) contacts the stressed steel bar (11), fixing the corrosion detection member (211) in the fixing groove 1 (314) on the support frame (313) in the protective cover shell (311), and the corrosion detection probe (212) contacts the side wall of the stressed steel bar (11), so as to facilitate the subsequent detection of the corrosion degree of the stressed steel bar (11); S120, the stress sensor (221) is arranged in the second fixing groove (34) on the support frame (313) in the protective cover shell (311), the stress detection probe (222) of the stress sensor (221) is against the side wall of the stressed steel bar (11), and the stopper (224) fixed on the stress detection probe (222) increases the contact area with the stressed steel bar (11) through the limit groove (225) provided, thereby improving the detection of the stress detection probe (222) on the stress generated by the expansion of the stressed steel bar (11) after corrosion; S130, after the corrosion detection member (211) and the stress sensor (221) are installed, another protective cover shell (311) is connected and fixed to the protective cover shell (311) fixed on the stressed steel bar (11) to prevent the poured concrete from damaging the corrosion monitoring mechanism (2); S210, after the pouring of the building body (1) is completed, the wires of the rust monitoring mechanism (2) are led out of the building body (1) through the connecting rod (33) and the connecting pipe (36) fixed on the protective cover shell (311) to prevent the wires from being broken during the pouring of the building body (1), so that the wires of the rust monitoring mechanism (2) are electrically connected to the signal collector (4).

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