A device and method for monitoring the corrosion and stress state of reinforcement in existing buildings in situ

Abstract

The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ monitoring device and method for corrosion and stress state of reinforcement of existing building, and relates to the technical field of building structure detection. The application discloses an in-situ

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of building structure detection, in particular to a device and a method for monitoring the corrosion and stress state of reinforcing steel bars in existing buildings. BACKGROUND

[0002] Reinforced concrete is one of the most widely used structural forms in the engineering field, which fully utilizes the compressive strength of concrete and the tensile strength of steel bars, and the concrete and the steel bars have good adhesion, and in addition, the concrete wrapped outside the steel bars can protect the steel bars from corrosion, and the two materials are effectively combined.

[0003] However, steel bar corrosion is a major factor affecting the mechanical properties and durability of the steel bars, and if the corrosion of the steel bars can be detected in time and corresponding preventive measures are taken, the economic losses can be greatly reduced or even avoided, and the travel safety of people can be ensured.

[0004] According to the related art, the inventors believe that the corrosion degree of the steel bars in the building cannot be detected in real time, and the building facilities cannot be safely handled in time. SUMMARY

[0005] The application aims to provide a device and a method for monitoring the corrosion and stress state of reinforcing steel bars in existing buildings, so as to solve the problem that the corrosion degree of the steel bars in the building cannot be detected in time, and the building facilities cannot be safely handled in time.

[0006] The application provides a device for monitoring the corrosion and stress state of reinforcing steel bars in existing buildings, which adopts the following technical scheme:

[0007] The device for monitoring the corrosion and stress state of reinforcing steel bars in existing buildings comprises a building body, a force-bearing steel bar embedded in the building body, a corrosion monitoring mechanism embedded in the building body, a corrosion detection assembly corresponding to the force-bearing steel bar in the building body, a fixing assembly provided on the outer side of the corrosion detection assembly, a stress sensing assembly corresponding to the corrosion detection assembly and embedded in the fixing assembly, and the stress sensing assembly corresponding to the force-bearing steel bar in the building body.

[0008] By adopting the technical scheme, the corrosion detection mechanism is arranged on the stress reinforcement in the building body, the corrosion detection mechanism is embedded in the building body, the corrosion detection component in the corrosion detection mechanism is used to monitor the corrosion degree of the stress reinforcement in real time, the stress sensing component is used to monitor the stress generated by the expansion of the stress reinforcement after corrosion in real time, the state of the stress reinforcement in the building body is detected, the corrosion degree of the stress reinforcement in the building is detected, and thus the building facility is effectively and safely handled.

[0009] Optionally, the corrosion detection component includes a corrosion detection piece, a corrosion detection probe connected to the corrosion detection piece is in contact with the stress reinforcement in the building body, the corrosion detection piece is connected to the fixing component outside the corrosion detection piece, a signal collector is arranged on the outer side wall of the building body, the signal collector is electrically connected to the corrosion detection probe, and a mounting rack is arranged on the outer side wall of the building body and connected to the signal collector.

[0010] By adopting the technical scheme, the corrosion detection piece is arranged on the fixing component arranged in the building body, the corrosion detection piece is in contact with the stress reinforcement through the corrosion detection piece, the corrosion degree of the stress reinforcement embedded in the building body is detected in real time, and after the corrosion state of the stress reinforcement exceeds a safety threshold, workers can timely reinforce the building according to the measured data, and damage of the building facility caused by corrosion of the stress reinforcement is avoided as much as possible.

[0011] Optionally, the fixing component includes a protective box body, a connecting groove is formed in the side wall of the protective box body and corresponds to the stress reinforcement, the protective box body includes two protective shells, the outer side wall of the protective shell is in contact with the stress reinforcement, the corrosion detection piece is arranged in the protective shell, a connecting groove is formed in the side close to each other of the protective shell, the connecting grooves of the two protective shells after connection form the connecting groove, a connecting rod is arranged on the outer side wall of the protective shell and in contact with the outer side wall of the building body, and the wire of the corrosion detection piece passes through the protective shell, is electrically connected to the signal collector along the connecting rod, and is electrically connected to the signal collector.

[0012] By adopting the technical scheme, the two protective shells form the protective box body, the protective shells are fixed on the transverse stress reinforcement, the connecting groove on the protective shell is in contact with the stress reinforcement, the corrosion detection piece is arranged in the protective shell, the other protective shell is spliced with the protective shell to form the protective box body, the concrete is isolated, the influence of the concrete on the corrosion detection piece is reduced, the wire of the corrosion detection piece is led out of the building body through the connecting rod, and the wire is less likely to be broken when the concrete is poured.

[0013] Optionally, the inner side wall of the protective shell is provided with a support frame, a fixing groove one is formed in one end of the support frame close to the rust detection piece, the inner side wall of the fixing groove one is in contact with the side wall of the rust detection piece, a fixing groove two is formed in the side of the two protective shells close to each other, and a sealing piece one is arranged in the fixing groove two.

[0014] By adopting the above technical scheme, the support frame is arranged in the protective shell, the rust detection piece is supported by the fixing groove one formed in the support frame, the rust detection piece is prevented from moving in the protective shell during pouring of concrete, and the rust detection piece is prevented from being affected, the sealing piece one arranged between the two protective shells reduces the possibility of concrete entering the protective shell, the rust detection piece can normally monitor the rusting state of the stress reinforcement, and the building body is safely reinforced after the rusting of the stress reinforcement in the building body exceeds a safety threshold.

[0015] Optionally, the stress sensing assembly comprises a stress sensor, a stress detection probe is arranged on the side of the stress sensor close to the stress reinforcement, the stress detection probe is in abutment with the side wall of the stress reinforcement, the stress sensor is located in the protective shell corresponding to the support frame, a fixing groove three is formed in the support frame, the stress sensor is arranged in the fixing groove three of the support frame, the stress sensor and the rust detection piece are located on the same protective shell, and the lead of the stress sensor is electrically connected with the signal collector through the connecting rod.

[0016] By adopting the above technical scheme, the stress sensor is arranged in the fixing groove three of the support frame in the protective shell, the stress sensor is fixed, the possibility that the stress detection probe of the stress sensor is misaligned with the stress reinforcement during pouring is reduced, the stability of the stress sensor in monitoring the stress state of the stress reinforcement after rusting is improved, the stress state of the stress reinforcement is monitored in real time by the stress sensor, the building body is immediately safely reinforced after the stress state of the stress reinforcement exceeds the normal condition, and the risk of damage to the building body is reduced.

[0017] Optionally, an elastic piece is arranged on the end of the stress detection probe close to the stress sensor, the elastic piece is connected with the side of the stress sensor close to the stress reinforcement, a stop block is arranged on the end of the stress detection probe close to the stress reinforcement, the elastic piece is in abutment with the side wall of the stop block, and a limiting groove corresponding to the side wall of the stress reinforcement is formed in the stop block.

[0018] Through adoption of the technical scheme, the elastic member arranged between the stress detection probe and the stress sensor makes the stopper arranged on the stress detection probe always abut against the side wall of the stress reinforcement, improves the accuracy of the stress state data of the stress reinforcement measured by the stress sensor, and further reduces the possibility of misalignment of the stress detection probe and the stress reinforcement through the limiting groove arranged on the stopper.

[0019] Optionally, the connecting rod side wall is provided with a connecting pipe connected with the protective shell, and the corrosion detection member and the wire of the stress sensor are led out along the connecting pipe inner side wall and electrically connected with the signal collector.

[0020] Through adoption of the technical scheme, the connecting pipe is arranged below the connecting rod, the wire of the corrosion monitoring mechanism is further protected, and the possibility of wire fracture during pouring of the concrete is reduced.

[0021] Optionally, the connecting groove arranged on the protective shell is provided with a sealing member two, the sealing member two is attached to the connecting groove inner side wall, and the sealing member two is in contact with the stress reinforcement after the two protective shells are spliced.

[0022] Through adoption of the technical scheme, the connecting groove composed of the connecting grooves is isolated after the two protective shells are spliced to form the protective box, the concrete is prevented from flowing into the protective box through the connecting groove, the corrosion detection member and the stress sensor are prevented from being damaged, the data measured by the corrosion monitoring mechanism is prevented from being affected, and the monitoring of the stress reinforcement state in the building body is prevented from being wrong.

[0023] A method for in-situ monitoring of corrosion and stress state of existing building steel bars comprises the following steps:

[0024] After the stress reinforcement of the building body is erected, the corrosion detection assembly and the stress sensing assembly are arranged on the stress reinforcement through the fixing assembly, and the corrosion monitoring mechanism is pre-buried in the building body after the building body is poured with concrete.

[0025] After the building body is poured, the mounting frame is arranged on the outer side wall of the building body, and the signal collector is arranged on the mounting frame and electrically connected with the corrosion monitoring mechanism pre-buried in the building body.

[0026] The corrosion detection member in the corrosion monitoring mechanism monitors the corrosion degree of the stress reinforcement in the building body in real time, the stress sensing assembly monitors the stress generated by the corrosion expansion of the stress reinforcement in the building body, and the signal collector collects the data signal detected by the corrosion monitoring mechanism.

[0027] When the corrosion degree of the stress reinforcement in the building body exceeds a safety threshold, the building body needs to be immediately treated for safety.

[0028] Optionally, the installation of the in-situ monitoring device for the corrosion and stress state of the existing building reinforcing steel includes the following steps:

[0029] The protective shell is fixed on the transverse reinforcing steel, the connecting groove on the protective shell is in contact with the reinforcing steel, the corrosion detection piece is fixed in the fixing groove one on the support frame in the protective shell, the corrosion detection probe is in contact with the side wall of the reinforcing steel, and the corrosion degree of the reinforcing steel is detected.

[0030] The stress sensor is arranged in the fixing groove two on the support frame in the protective shell, the stress detection probe of the stress sensor abuts against the side wall of the reinforcing steel, the stop block fixed on the stress detection probe increases the contact area with the reinforcing steel through the limiting groove, and the stress detection probe improves the detection of the stress generated by the expansion of the reinforcing steel after corrosion.

[0031] After the corrosion detection piece and the stress sensor are installed, the other protective shell is connected and fixed with the protective shell fixed on the reinforcing steel, so that the corrosion monitoring mechanism is prevented from being damaged by the poured concrete.

[0032] After the building body is poured, the wires of the corrosion monitoring mechanism are led out of the building body through the connecting rod and the connecting pipe fixed on the protective shell, so that the wires are prevented from being broken in the pouring of the building body, and the wires of the corrosion monitoring mechanism are electrically connected with the signal collector.

[0033] In summary, the present application has the following at least one beneficial technical effect:

[0034] 1. The corrosion detection piece is arranged on the fixing assembly arranged in the building body, the corrosion detection piece is in contact with the reinforcing steel through the corrosion detection arranged on the corrosion detection piece, the corrosion degree of the reinforcing steel embedded in the building body is detected in real time, and after the corrosion state of the reinforcing steel exceeds the safety threshold, workers can timely reinforce the building according to the measured data, so as to avoid damage to the building facilities caused by the corrosion of the reinforcing steel as much as possible.

[0035] 2. The protective shell is fixed on the transverse reinforcing steel, the connecting groove on the protective shell is in contact with the reinforcing steel, the corrosion detection piece is arranged in the protective shell, another protective shell is spliced with the protective shell to form a protective box body, the concrete is isolated, the influence of the concrete on the corrosion detection piece is reduced, the wires of the corrosion detection piece are led out of the building body through the connecting rod, and the possibility that the wires are broken in the pouring of the concrete is reduced.

[0036] 3. The stress sensor is arranged in the fixing groove three of the support frame of the protective shell, the stress sensor is fixed, the stress detection probe of the stress sensor is not overlapped with the stress steel bar in the pouring process, the stability of the stress sensor for monitoring the stress state of the stress steel bar after corrosion is improved, the stress state of the stress steel bar is monitored in real time through the stress sensor, the building body is immediately reinforced in safety when the stress state of the stress steel bar exceeds the normal condition, and the risk of damage of the building body is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a whole schematic view of the in-situ monitoring device for the corrosion and stress state of the steel bar of existing building.

[0038] Figure 2 It is a partial sectional view of the in-situ monitoring device for the corrosion and stress state of the steel bar of building.

[0039] Figure 3 It is Figure 2 the partial enlarged view of A in

[0040] Figure 4 It is a partial schematic view of the in-situ monitoring device for the corrosion and stress state of the steel bar of building.

[0041] Figure 5 It is Figure 4 the partial enlarged view of B in

[0042] In the figure, 1, building body; 11, stress steel bar; 2, corrosion monitoring mechanism; 21, corrosion detection assembly; 211, corrosion detection piece; 212, corrosion detection probe; 22, stress sensing assembly; 221, stress sensor; 222, stress detection probe; 223, elastic piece; 224, stop block; 225, limiting groove; 3, fixing assembly; 31, protective box; 311, protective 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, sealing piece one; 36, connecting pipe; 37, sealing piece two; 4, signal collector; 5, mounting frame. DETAILED DESCRIPTION

[0043] The following will be combined with the Figure 1 - the drawings Figure 5 , the present application is further described in detail. EMBODIMENT

[0044] The in-situ monitoring device for the corrosion and stress state of the steel bar of existing building, referring to Figures 1 to 3The utility model relates to a kind of reinforced concrete building corrosion and stress real-time monitoring system, including building body 1, force steel bar 11 for supporting building body 1 is embedded in building body 1, force steel bar 11 is fixed in building body 1 by interlaced distribution and interconnection, protective box 31 is embedded in building body 1, protective box 31 is made of two protective shells 311, one of protective shells 311 is fixed on force steel bar 11 by metal snap ring, and the outside wall of protective shell 311 is in contact with force steel bar 11;Support frame 313 is welded on the inside wall of protective shell 311, support frame 313 is evenly distributed in protective shell 311, fixed slot one 314 is set on support frame 313, and rust detection piece 211 is fixed in fixed slot one 314 on support frame 313, fixed slot three 315 is also set on support frame 313, and stress sensor 221 is fixed in fixed slot three 315;Connecting groove 321 is set on the side wall of protective shell 311, and the inside wall of connecting groove 321 is in contact with the side wall of force steel bar 11, and connecting groove 321 on two protective shells 311 forms connecting groove 32, and force steel bar 11 is fixed, and the degree of rust and stress state of force steel bar 11 are monitored in real time by detection instrument in protective shell 311.

[0045] Referring to Figures 1 to 3 Metal connecting rod 33 is welded on protective shell 311, hollow connecting pipe 36 is welded below connecting rod 33, connecting pipe 36 is fixedly connected with the side wall of protective shell 311, and the wire of detection instrument in protective shell 311 is led out of building body 1 by connecting pipe 36;Metal mounting bracket 5 is fixedly connected with fastening bolt embedded on building body 1 outside building body 1, signal collector 4 is fixed on mounting bracket 5 by bolt, and the wire of rust detection piece 211 and stress sensor 221 in protective shell 311 is electrically connected with signal collector 4, and the signal transmitted by detection instrument is collected and analyzed.

[0046] Referring to Figure 2 And Figure 3 Fixed slot two 34 is set on the side of two protective shells 311 close to each other, sealing piece 35 is placed in fixed slot two 34, sealing piece 35 is isolation rubber pad, and the gap between two protective shells 311 is isolated after the bolt connection of the buckling of two protective shells 311, to prevent concrete from entering, the fixed slot one 314 set on support frame 313 on the buckling of two protective shells 311 is fixedly fixed rust detection piece 211, and the fixed slot three 315 set on support frame 313 is fixedly fixed stress sensor 221;Rust detection piece 211 is steel rust detection instrument, and rust detection probe 212 connected on rust detection piece 211 is in contact with the side wall of force steel bar 11, to monitor the degree of steel rust;The stress detection probe 222 arranged on stress sensor 221 is in contact with the side wall of force steel bar 11, to monitor the stress state change of steel in real time.

[0047] Referring to Figures 2 to 5 The sealing member two 37 is pasted in the connecting groove 321 of the protective shell 311 and is in contact with the side wall of the stress reinforcement 11. After the two protective shells 311 form the protective box 31, the gap between the connecting groove 32 and the stress reinforcement 11 is blocked, so that the concrete cannot enter the protective box 31 and affect the detection instrument. The elastic member 223 is connected and fixed on the stress detection probe 222 of the stress sensor 221. The elastic member 223 is a thrust spring. The metal stopper 224 is fixed on one end of the stress detection probe 222 close to the stress reinforcement 11 by a screw. The limiting groove 225 corresponding to the stress reinforcement 11 is formed in the stopper 224. The data accuracy of the stress state of the stress reinforcement 11 measured by the stress sensor 221 is improved. The limiting groove 225 formed in the stopper 224 reduces the possibility that the stress detection probe 222 is misaligned with the stress reinforcement 11. Embodiment

[0048] S100, after the stress reinforcement 11 of the building body 1 is erected, the rust detection assembly 21 and the stress sensing assembly 22 are arranged on the stress reinforcement 11 through the fixing assembly 3. The rust monitoring mechanism 2 is pre-buried in the building body 1 when the building body 1 is poured with concrete.

[0049] S110, the protective shell 311 is fixed on the transverse stress reinforcement 11, so that the connecting groove 321 on the protective shell 311 is in contact with the stress reinforcement 11. The rust detection member 211 is fixed in the fixing groove one 314 on the support frame 313 in the protective shell 311. The rust detection probe 212 is in contact with the side wall of the stress reinforcement 11, which facilitates the detection of the rusting degree of the stress reinforcement 11.

[0050] S120, the stress sensor 221 is arranged in the fixing groove two 34 on the support frame 313 in the protective shell 311. The stress detection probe 222 of the stress sensor 221 abuts against the side wall of the stress reinforcement 11. The stopper 224 fixed on the stress detection probe 222 increases the contact area with the stress reinforcement 11 through the limiting groove 225, so that the stress detection probe 222 detects the stress generated by the rusting and expansion of the stress reinforcement 11.

[0051] S130, after the rust detection member 211 and the stress sensor 221 are installed, the other protective shell 311 is connected and fixed with the protective shell 311 fixed on the stress reinforcement 11, so that the poured concrete cannot damage the rust monitoring mechanism 2.

[0052] S200, after the building body 1 is poured, 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 and electrically connected with the corrosion monitoring mechanism 2 embedded in the building body 1;

[0053] S210, after the building body 1 is poured, the connecting rod 33 and the connecting pipe 36 fixed on the protective shell 311 are used to lead the wire of the corrosion monitoring mechanism 2 out of the building body 1, so that the wire is prevented from being broken in the pouring of the building body 1, and the wire of the corrosion monitoring mechanism 2 is electrically connected with the signal collector 4.

[0054] S300, the corrosion detection piece 211 in the corrosion monitoring mechanism 2 is used to monitor the corrosion degree of the stress reinforcement 11 in the building body 1 in real time, the stress sensing assembly 22 is used to monitor the stress generated by the corrosion expansion of the stress reinforcement 11 in the building body 1, and the signal collector 4 is used to collect the data signal detected by the corrosion monitoring mechanism 2.

[0055] S400, after the corrosion degree of the stress reinforcement 11 in the building body 1 exceeds a safety threshold, the building body 1 needs to be immediately treated for safety.

[0056] The implementation principle of the embodiment of the application is as follows:

[0057] The protective shell 311 is arranged on the stress reinforcement 11, another stress reinforcement 11 is in contact with the connecting groove 321 on the protective shell 311, then the corrosion detection piece 211 and the stress sensor 221 are arranged in the fixing groove on the support frame 313 in the protective shell 311, then another protective shell 311 is fixed above the protective shell 311, the corrosion detection piece 211 and the stress sensor 221 are fixed through the fixing grooves on the support frames 313 of the two protective shells 311, and the two protective shells 311 form a protective box 31 to isolate the concrete; after the building body 1 is poured, the corrosion detection piece 211 and the stress sensor 221 monitor the corrosion degree and the stress state of the stress reinforcement 11 in real time, the measured data are sent to the data collector for analysis and processing through the wire, the corrosion degree of the stress reinforcement 11 is judged by a worker according to the data collected by the data collector, and the building facility is immediately reinforced for safety when the corrosion degree of the stress reinforcement 11 exceeds a safety threshold; the stress reinforcement 11 is monitored in real time by the corrosion detection piece 211 and the stress sensor 221 embedded in the building body 1, the stress reinforcement in the building body 1 can be detected for a long time without interruption, the state of the stress reinforcement 11 in the building is monitored in real time to prevent, and thus the building facility can be effectively treated for safety.

[0058] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A device for monitoring the corrosion and stress state of reinforcing steel in existing buildings in situ, comprising a building body (1) in which there are embedded stressed reinforcing steels (11), characterised in that: The building body (1) is provided with a rust monitoring mechanism (2), the rust monitoring mechanism (21) is embedded in the building body (1), the stress steel bars (11) in the building body (1) correspond to the rust detection assembly (21), the outer side of the rust detection assembly (21) is provided with a fixing assembly (3), the fixing assembly (3) is connected with the rust detection assembly (21), the fixing assembly (3) is provided with a stress sensing assembly (22) corresponding to the rust detection assembly (21), the stress sensing assembly (22) corresponds to the stress steel bars (11) in the building body (1); The rust detection assembly (21) includes a rust detection piece (211), the rust detection probe (212) connected to the rust detection piece (211) is in contact with the stress steel bars (11) in the building body (1), the rust detection piece (211) is connected with the fixing assembly (3) outside, the building body (1) is provided with a signal collector (4) on the outer side wall, the signal collector (4) is electrically connected with the rust detection probe (212), the building body (1) is provided with a mounting rack (5) on the outer side wall, and the mounting rack (5) is connected with the signal collector (4); The fixing assembly (3) includes a protection box (31), the side wall of the protection box (31) is provided with a connecting groove (32), the connecting groove (32) corresponds to the stress steel bars (11), the protection box (31) includes two protection cover shells (311), the outer side wall of the protection cover shell (311) is in contact with the stress steel bars (11), the rust detection piece (211) is arranged in the protection cover shell (311), the connecting groove (321) is formed in the side of the protection cover shell (311) close to each other, the connecting grooves (321) of the two protection cover shells (311) after being connected form the connecting groove (32), the outer side wall of the protection cover shell (311) is provided with a connecting rod (33), the connecting rod (33) is in contact with the outer side wall of the building body (1), and the wires of the rust detection piece (211) pass through the protection cover shell (311) and are electrically connected with the signal collector (4) along the connecting rod (33); The inner side wall of the protection cover shell (311) is provided with a support frame (313). The stress sensing assembly (22) comprises a stress sensor (221), a stress detection probe (222) is arranged on one side of the stress sensor (221) close to the stressed reinforcement (11), the stress detection probe (222) abuts against the side wall of the stressed reinforcement (11), the stress sensor (221) is located in the protective shell (311) corresponding to the support frame (313), the support frame (313) is provided with a fixing groove three (315), the stress sensor (221) is arranged in the fixing groove three (315) on the support frame (313), the stress sensor (221) and the corrosion detection piece (211) are located on the same protective shell (311), and the lead of the stress sensor (221) is electrically connected with the signal collector (4) through the connecting rod (33).

2. The in-situ monitoring device for the corrosion and stress state of reinforcement in existing buildings according to claim 1, characterized in that: The support frame (313) is provided with a fixing groove one (314) at one end close to the corrosion detection piece (211), the inner wall of the fixing groove one (314) is in contact with the side wall of the corrosion detection piece (211), and the two protective shells (311) are provided with a fixing groove two (34) on one side close to each other, and the fixing groove two (34) is provided with a sealing piece one (35).

3. The device for monitoring the corrosion and stress state of reinforcement in existing buildings according to claim 2, characterized in that: The stress detection probe (222) is provided with an elastic piece (223) at one end close to the stress sensor (221), the elastic piece (223) is connected with the side of the stress sensor (221) close to the stressed reinforcement (11), the stress detection probe (222) is provided with a stop block (224) at one end close to the stressed reinforcement (11), the elastic piece (223) abuts against the side wall of the stop block (224), and the stop block (224) is provided with a limiting groove (225) corresponding to the side wall of the stressed reinforcement (11).

4. The device for monitoring the corrosion and stress state of reinforcement in existing buildings according to claim 3, characterized in that: The side wall of the connecting rod (33) is provided with a connecting pipe (36) connected with the protective shell (311), and the lead of the corrosion detection piece (211) and the stress sensor (221) is led out along the inner wall of the connecting pipe (36) and electrically connected with the signal collector (4).

5. The in-situ monitoring device for the corrosion and stress state of reinforcement in existing buildings according to claim 4, characterized in that: The connecting recess (321) formed in the protective shell (311) is provided with a sealing piece two (37), the sealing piece two (37) is fitted with the inner wall of the connecting recess (321), and the sealing piece two (37) is in contact with the stressed reinforcement (11) after the two protective shells (311) are spliced.

6. A method for in-situ monitoring of the corrosion and stress state of reinforcement in existing buildings, characterized in that: The in-situ detection device for the corrosion and stress state of the reinforcement of an existing building of claim 5, S100, after the stressed reinforcement (11) of the building body (1) is erected, the corrosion detection assembly (21) and the stress sensing assembly (22) are arranged on the stressed reinforcement (11) through the fixing assembly (3), 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 poured, 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) and electrically connected with the corrosion monitoring mechanism (2) embedded in the building body (1); S300, the corrosion detection piece (211) in the corrosion monitoring mechanism (2) is used for monitoring the corrosion degree of the stress reinforcement (11) in the building body (1) in real time, the stress sensing assembly (22) is used for monitoring the stress generated by the corrosion expansion of the stress reinforcement (11) in the building body (1), and the signal collector (4) is used for collecting the data signal detected by the corrosion monitoring mechanism (2); S400, after the corrosion degree of the stress reinforcement (11) in the building body (1) exceeds a safety threshold, the building body (1) needs to be immediately treated.

7. The in-situ monitoring method for the corrosion and stress state of the reinforcement of an existing building according to claim 6, characterized in that: S110, the protective shell (311) is fixed on the transverse stress reinforcement (11), the connecting groove (321) on the protective shell (311) is in contact with the stress reinforcement (11), the corrosion detection piece (211) is fixed in the fixed slot one (314) on the support frame (313) in the protective shell (311), and the corrosion detection probe (212) is in contact with the side wall of the stress reinforcement (11), so that the corrosion degree of the stress reinforcement (11) is conveniently detected subsequently; S120, the stress sensor (221) is arranged in the fixed slot two (34) on the support frame (313) in the protective shell (311), the stress detection probe (222) of the stress sensor (221) abuts against the side wall of the stress reinforcement (11), the stop block (224) fixed on the stress detection probe (222) increases the contact area with the stress reinforcement (11) through the limiting slot (225), and the detection of the stress generated by the expansion of the stress reinforcement (11) after corrosion by the stress detection probe (222) is improved; S130, after the corrosion detection piece (211) and the stress sensor (221) are installed, another protective shell (311) is connected and fixed with the protective shell (311) fixed on the stress reinforcement (11), so that the corrosion monitoring mechanism (2) is prevented from being damaged by the poured concrete; S210, after the building body (1) is poured, the lead of the corrosion monitoring mechanism (2) is led out of the building body (1) through the connecting rod (33) and the connecting pipe (36) fixed on the protective shell (311), the lead is prevented from being broken in the pouring of the building body (1), and the lead of the corrosion monitoring mechanism (2) is electrically connected with the signal collector (4).

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