Stress monitoring device for incremental launching construction of steel-concrete combined continuous beam

Abstract

The utility model discloses a stress monitoring device for incremental launching construction of a steel-concrete combined continuous beam, and relates to the technical field of bridge monitoring. The problems that an existing stress monitoring device cannot be stably connected with a detected bridge, so that the detection accuracy is low, and potential safety hazards exist in the construction process are solved. The fiber grating strain sensors are arranged on the left upper transverse pipe, the right upper transverse pipe, the left lower transverse pipe and the right lower transverse pipe respectively and are fixed through the U-shaped clamps and the bolts, so that the stress monitoring device is stably connected with the detected bridge, and stress monitoring of the corresponding position of the bridge is achieved. By using the GFRP transverse pipe, the epoxy resin glue and the temperature compensator, the accuracy of a measurement result of the device is improved, potential safety hazards during construction are greatly reduced, and the device has the advantages of being good in long-term stability, capable of achieving distributed measurement, convenient and reliable to install and capable of being used in various steel-concrete combined continuous beam projects. The bridge monitoring system is suitable for the technical field of bridge monitoring.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge monitoring, and particularly relates to a stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam. Background Technique

[0002] The steel-concrete composite continuous beam is a new type of structure developed on the basis of steel structures and concrete structures. It has the advantages of reducing the self-weight of the structure, improving the flexural bearing capacity, increasing the stiffness, facilitating construction, having significant economic benefits, being environmentally friendly, and improving the overall stability and local stability. These advantages have enabled the steel-concrete composite beam to be widely applied and promoted in the fields of bridge engineering, building structures, etc. The bridge incremental launching stress monitoring device realizes the real-time monitoring and evaluation of the stress state of the bridge structure during the incremental launching process through the coordinated work of sensor technology, data acquisition and processing technology, and real-time monitoring and analysis system, providing a strong guarantee for the safety of bridge construction and operation.

[0003] During the incremental launching construction of the bridge, various factors need to be considered in the process of measuring the bridge incremental launching stress, such as temperature, humidity, vibration, etc. The changes of these factors will all cause certain interference to the stress measurement results. In addition, factors such as the accuracy, stability, and installation position of the measuring equipment will also affect the measurement results. Stress monitoring has the disadvantages of being easily affected by environmental factors, limited measurement accuracy, poor long-term stability, weak anti-interference ability, and difficulty in realizing distributed measurement, which makes there are many problems in the stress monitoring work during the incremental launching construction of the bridge.

[0004] To sum up, the existing stress monitoring device cannot be stably connected to the bridge to be detected, resulting in low detection accuracy, and further leading to potential safety hazards during construction. Content of the Utility Model

[0005] The utility model aims to solve the problem that the existing stress monitoring device cannot be stably connected to the bridge to be detected, resulting in low detection accuracy, and further leading to potential safety hazards during construction, and proposes a stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam.

[0006] A stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam of the utility model comprises a left upper horizontal pipe 1, a right upper horizontal pipe 2, a left lower horizontal pipe 3, a right lower horizontal pipe 4, a fiber Bragg grating strain sensor 5, a saddle clamp 8, and a temperature compensator 9;

[0007] The upper left horizontal pipe 1 and the upper right horizontal pipe 2 are arranged in parallel and opposite to each other. The upper left horizontal pipe 1 is arranged on one side of the connection between the top plate of the bridge box and the longitudinal stiffener, and the upper right horizontal pipe 2 is arranged on the other side of the connection between the top plate of the bridge box and the longitudinal stiffener. The lower left horizontal pipe 3 and the lower right horizontal pipe 4 are arranged in parallel and opposite to each other. The lower left horizontal pipe 3 is arranged on one side of the connection between the bottom plate of the bridge box and the longitudinal stiffener, and the lower right horizontal pipe 4 is arranged on the other side of the connection between the bottom plate of the bridge box and the longitudinal stiffener. The upper left horizontal pipe 1, the upper right horizontal pipe 2, the lower left horizontal pipe 3 and the lower right horizontal pipe 4 are all fixed to the bridge box through the saddle clips 8. A fiber Bragg grating strain sensor 5 is respectively provided on the upper horizontal pipe 1, the upper right horizontal pipe 2, the lower left horizontal pipe 3 and the lower right horizontal pipe 4, and the fiber Bragg grating strain sensor 5 is fixed to the horizontal pipe through the saddle clip 8. One end of each fiber Bragg grating strain sensor 5 is provided with a temperature compensator 9;

[0008] Further, the other end of each fiber Bragg grating strain sensor 5 is provided with a fiber jumper interface 7;

[0009] Further, the saddle clip 8 is connected to the bridge box through bolts 6;

[0010] Further, an epoxy resin adhesive layer is provided at the contact between the inner wall of the saddle clip 8 and the outer surface of the fiber Bragg grating strain sensor 5;

[0011] Further, the upper left horizontal pipe 1, the upper right horizontal pipe 2, the lower left horizontal pipe 3 and the lower right horizontal pipe 4 are made of GFRP pipes;

[0012] Further, the fiber jumper interface 7 on the fiber Bragg grating strain sensor 5 is connected to the temperature compensator 9 through a fiber jumper;

[0013] Further, an epoxy resin adhesive layer is provided between the fiber jumper interface 7 on the fiber Bragg grating strain sensor 5 and the outer surface of the horizontal pipe;

[0014] Further, during use, the fiber Bragg grating strain sensors 5 are respectively inserted into the upper left horizontal pipe 1, the upper right horizontal pipe 2, the lower left horizontal pipe 3, and the lower right horizontal pipe 4 and fixed by epoxy resin adhesive bonding. Move the upper left horizontal pipe 1 and the upper right horizontal pipe 2 equipped with fiber Bragg grating strain sensors to the connection between the inner top plate of the box girder and the longitudinal stiffener, and move the lower left horizontal pipe 3 and the lower right horizontal pipe 4 equipped with fiber Bragg grating strain sensors to the connection between the inner bottom plate of the box girder and the longitudinal stiffener. Insert the upper left horizontal pipe 1 and the upper right horizontal pipe 2 into the holes reserved at the connection between the inner top plate of the box girder and the longitudinal stiffener through the riding clip 8 using bolts 6, add gaskets and nuts. Then insert the lower left horizontal pipe 3 and the lower right horizontal pipe 4 into the holes reserved at the connection between the inner bottom plate of the box girder and the longitudinal stiffener through the riding clip 8 using bolts 6, add gaskets and nuts. Use epoxy resin adhesive to bond the riding clip 8 to the corresponding horizontal pipe to improve the response accuracy of the sensor to stress changes. Use epoxy resin adhesive to connect the fiber jumper interface 7 to the ends of the corresponding upper left horizontal pipe 1, upper right horizontal pipe 2, lower left horizontal pipe 3, and lower right horizontal pipe 4. Connect the fiber Bragg grating strain sensor to the temperature compensator using a fiber jumper. The bridge stress monitoring device is manufactured and installed at the connections between the inner top and bottom plates of the box girder and the longitudinal stiffeners respectively, or can also be installed at the connection between the beam and the pier. During monitoring, the strain of the bridge will cause the wavelength of the fiber Bragg grating strain sensor to drift, thereby realizing the monitoring of the stress during the bridge jacking process. The structure of the utility model is simple and reasonable. By arranging a fiber Bragg grating strain sensor 5 in each of the upper left horizontal pipe 1, upper right horizontal pipe 2, lower left horizontal pipe 3, and lower right horizontal pipe 4 and fixing it through the riding clip 8 and bolts 6, the stress monitoring of the corresponding position of the bridge is realized. By using the GFRP material protection pipe, epoxy resin adhesive and temperature compensator, the accuracy of the measurement result of the device is improved, and it has the advantages of good long-term stability, realizing distributed measurement, convenient and reliable installation, and can be used in various steel-concrete composite continuous beam projects.

[0015] The utility model has the following beneficial effects compared with the prior art:

[0016] The utility model overcomes the shortcomings of the prior art. By arranging a fiber Bragg grating strain sensor in each of the upper left horizontal pipe, upper right horizontal pipe, lower left horizontal pipe, and lower right horizontal pipe and fixing it through the riding clip and bolts, the stress monitoring device is stably connected to the bridge to be detected, and then the stress monitoring of the corresponding position of the bridge is realized. By using the GFRP material horizontal pipe, epoxy resin adhesive and temperature compensator, the accuracy of the measurement result of the device is improved, greatly reducing the safety hazards during construction, and it has the advantages of good long-term stability, realizing distributed measurement, convenient and reliable installation, and can be used in various steel-concrete composite continuous beam projects. Description of the Drawings

[0017] Figure 1 is the main sectional view of a stress monitoring device for the jacking construction of a steel-concrete composite continuous beam described in the utility model;

[0018] Figure 2 It is a top view of a stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam described in the present utility model. Specific embodiments

[0019] Specific embodiment 1: In combination with Figure 1 and Figure 2 This embodiment is described. A stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam described in this embodiment includes a left upper horizontal pipe 1, a right upper horizontal pipe 2, a left lower horizontal pipe 3, a right lower horizontal pipe 4, a fiber Bragg grating strain sensor 5, a saddle clamp 8 and a temperature compensator 9;

[0020] The left upper horizontal pipe 1 and the right upper horizontal pipe 2 are arranged in parallel and opposite to each other, and the left upper horizontal pipe 1 is arranged on one side of the connection between the top plate of the bridge box and the longitudinal stiffener, and the right upper horizontal pipe 2 is arranged on the other side of the connection between the top plate of the bridge box and the longitudinal stiffener. The left lower horizontal pipe 3 and the right lower horizontal pipe 4 are arranged in parallel and opposite to each other, and the left lower horizontal pipe 3 is arranged on one side of the connection between the bottom plate of the bridge box and the longitudinal stiffener, and the right lower horizontal pipe 4 is arranged on the other side of the connection between the bottom plate of the bridge box and the longitudinal stiffener. The left upper horizontal pipe 1, the right upper horizontal pipe 2, the left lower horizontal pipe 3 and the right lower horizontal pipe 4 are all fixed to the bridge box through the saddle clamp 8. A fiber Bragg grating strain sensor 5 is respectively provided on the left upper horizontal pipe 1, the right upper horizontal pipe 2, the left lower horizontal pipe 3 and the right lower horizontal pipe 4, and the fiber Bragg grating strain sensor 5 is fixed to the horizontal pipe through the saddle clamp 8. A temperature compensator 9 is provided at one end of each fiber Bragg grating strain sensor 5;

[0021] In this specific embodiment, when in use, the fiber Bragg grating strain sensors 5 are respectively inserted into the upper left horizontal pipe 1, the upper right horizontal pipe 2, the lower left horizontal pipe 3, and the lower right horizontal pipe 4 and fixed by epoxy resin adhesive. Move the upper left horizontal pipe 1 and the upper right horizontal pipe 2 equipped with fiber Bragg grating strain sensors to the connection between the inner top plate of the box girder and the longitudinal stiffener, and move the lower left horizontal pipe 3 and the lower right horizontal pipe 4 equipped with fiber Bragg grating strain sensors to the connection between the inner bottom plate of the box girder and the longitudinal stiffener. Insert the upper left horizontal pipe 1 and the upper right horizontal pipe 2 into the holes reserved at the connection between the inner top plate of the box girder and the longitudinal stiffener through the saddle clips 8 using bolts 6, add gaskets and nuts. Then insert the lower left horizontal pipe 3 and the lower right horizontal pipe 4 into the holes reserved at the connection between the inner bottom plate of the box girder and the longitudinal stiffener through the saddle clips 8 using bolts 6, add gaskets and nuts. Use epoxy resin adhesive to bond the saddle clip 8 to the corresponding horizontal pipe to improve the response accuracy of the sensor to stress changes. Use epoxy resin adhesive to connect the fiber jumper interface 7 to the ends of the corresponding upper left horizontal pipe 1, upper right horizontal pipe 2, lower left horizontal pipe 3, and lower right horizontal pipe 4. Connect the fiber Bragg grating strain sensor and the temperature compensator using a fiber jumper. The bridge stress monitoring device is thus prepared and installed at the connections between the inner top and bottom plates of the box girder and the longitudinal stiffener respectively, or can also be installed at the connection between the beam and the pier. During monitoring, the strain of the bridge will cause the wavelength of the fiber Bragg grating strain sensor to drift, thereby realizing the monitoring of the stress during the bridge jacking process. The structure of the present utility model is simple and reasonable. By arranging a fiber Bragg grating strain sensor 5 in each of the upper left horizontal pipe 1, upper right horizontal pipe 2, lower left horizontal pipe 3, and lower right horizontal pipe 4 and fixing it through the saddle clip 8 and the bolt 6, the stress monitoring of the corresponding positions of the bridge is realized. By using the GFRP material protection pipe, epoxy resin adhesive and temperature compensator, the accuracy of the measurement results of the device is improved, and it has the advantages of good long-term stability, realizing distributed measurement, convenient and reliable installation, and can be used in various steel-concrete composite continuous beam projects.

[0022] Specific Embodiment 2: With reference to Figure 1 and Figure 2 describe this embodiment. This embodiment is a further limitation on the stress monitoring device described in Specific Embodiment 1. For a stress monitoring device for the jacking construction of a steel-concrete composite continuous beam described in this embodiment, the other end of each fiber Bragg grating strain sensor 5 is provided with a fiber jumper interface 7.

[0023] Specific Embodiment 3: With reference to Figure 1 and Figure 2 describe this embodiment. This embodiment is a further limitation on the stress monitoring device described in Specific Embodiment 1. For a stress monitoring device for the jacking construction of a steel-concrete composite continuous beam described in this embodiment, the saddle clip 8 is connected to the bridge box through bolts 6.

[0024] Specific Embodiment 4: With reference to Figure 1 and Figure 2To describe this embodiment, this embodiment further limits the stress monitoring device described in the third specific embodiment. For a stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam described in this embodiment, an epoxy resin adhesive layer is provided at the contact between the inner wall of the clip 8 and the outer surface of the fiber Bragg grating strain sensor 5.

[0025] Specific embodiment five: Combining Figure 1 and Figure 2 To describe this embodiment, this embodiment further limits the stress monitoring device described in the first specific embodiment. For a stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam described in this embodiment, the upper left horizontal pipe 1, the upper right horizontal pipe 2, the lower left horizontal pipe 3, and the lower right horizontal pipe 4 are made of GFRP pipes.

[0026] Specific embodiment six: Combining Figure 1 and Figure 2 To describe this embodiment, this embodiment further limits the stress monitoring device described in the second specific embodiment. For a stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam described in this embodiment, the fiber jumper interface 7 on the fiber Bragg grating strain sensor 5 is connected to the temperature compensator 9 through a fiber jumper.

[0027] Specific embodiment seven: Combining Figure 1 and Figure 2 To describe this embodiment, this embodiment further limits the stress monitoring device described in the sixth specific embodiment. For a stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam described in this embodiment, an epoxy resin adhesive layer is provided between the fiber jumper interface 7 on the fiber Bragg grating strain sensor 5 and the outer surface of the horizontal pipe.

[0028] Working principle

[0029] During use, the fiber Bragg grating strain sensors 5 are respectively inserted into the upper left horizontal pipe 1, the upper right horizontal pipe 2, the lower left horizontal pipe 3, and the lower right horizontal pipe 4 and fixed by bonding with epoxy resin glue. Move the upper left horizontal pipe 1 and the upper right horizontal pipe 2 equipped with fiber Bragg grating strain sensors to the connection between the inner top plate of the box girder and the longitudinal stiffener, and move the lower left horizontal pipe 3 and the lower right horizontal pipe 4 equipped with fiber Bragg grating strain sensors to the connection between the inner bottom plate of the box girder and the longitudinal stiffener. Insert the upper left horizontal pipe 1 and the upper right horizontal pipe 2 into the holes reserved at the connection between the inner top plate of the box girder and the longitudinal stiffener through the saddle clip 8 using bolts 6, add gaskets and nuts. Then insert the lower left horizontal pipe 3 and the lower right horizontal pipe 4 into the holes reserved at the connection between the inner bottom plate of the box girder and the longitudinal stiffener through the saddle clip 8 using bolts 6, add gaskets and nuts. Use epoxy resin glue to bond the saddle clip 8 with the corresponding horizontal pipe to improve the response accuracy of the sensor to stress changes. Use epoxy resin glue to connect the fiber jumper interface 7 with the ends of the corresponding upper left horizontal pipe 1, upper right horizontal pipe 2, lower left horizontal pipe 3, and lower right horizontal pipe 4. Connect the fiber Bragg grating strain sensor with the temperature compensator using a fiber jumper. A bridge stress monitoring device is manufactured and installed at the connections between the inner top and bottom plates of the box girder and the longitudinal stiffener respectively, or can also be installed at the connection between the beam and the pier. During monitoring, the strain of the bridge will cause the wavelength of the fiber Bragg grating strain sensor to drift, thereby realizing the monitoring of the stress during the bridge jacking process. The structure of the utility model is simple and reasonable. By arranging a fiber Bragg grating strain sensor 5 in each of the upper left horizontal pipe 1, the upper right horizontal pipe 2, the lower left horizontal pipe 3, and the lower right horizontal pipe 4 and fixing it with the saddle clip 8 and bolts 6, the stress monitoring of the corresponding positions of the bridge is realized. By using a GFRP material protection pipe, epoxy resin glue, and a temperature compensator, the accuracy of the measurement results of the device is improved. It has the advantages of good long-term stability, realizing distributed measurement, convenient and reliable installation, and can be used in various steel-concrete composite continuous beam projects.

Claims

1. A stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam, characterized in that: It includes a left upper horizontal pipe (1), a right upper horizontal pipe (2), a left lower horizontal pipe (3), a right lower horizontal pipe (4), a fiber Bragg grating strain sensor (5), a saddle clamp (8) and a temperature compensator (9); The left upper horizontal pipe (1) and the right upper horizontal pipe (2) are arranged in parallel and opposite to each other. The left upper horizontal pipe (1) is arranged on one side of the connection between the top plate of the bridge box and the longitudinal stiffener, and the right upper horizontal pipe (2) is arranged on the other side of the connection between the top plate of the bridge box and the longitudinal stiffener. The left lower horizontal pipe (3) and the right lower horizontal pipe (4) are arranged in parallel and opposite to each other. The left lower horizontal pipe (3) is arranged on one side of the connection between the bottom plate of the bridge box and the longitudinal stiffener, and the right lower horizontal pipe (4) is arranged on the other side of the connection between the bottom plate of the bridge box and the longitudinal stiffener. The left upper horizontal pipe (1), the right upper horizontal pipe (2), the left lower horizontal pipe (3) and the right lower horizontal pipe (4) are all fixed to the bridge box through the saddle clamp (8). A fiber Bragg grating strain sensor (5) is respectively provided on the left upper horizontal pipe (1), the right upper horizontal pipe (2), the left lower horizontal pipe (3) and the right lower horizontal pipe (4), and the fiber Bragg grating strain sensor (5) is fixed to the horizontal pipe through the saddle clamp (8). A temperature compensator (9) is provided at one end of each fiber Bragg grating strain sensor (5).

2. The stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam according to claim 1, characterized in that: A fiber optic jumper interface (7) is provided at the other end of each fiber Bragg grating strain sensor (5).

3. The stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam according to claim 1, wherein: The saddle clamp (8) is connected to the bridge box through bolts (6).

4. The stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam according to claim 3, characterized in that: An epoxy resin glue layer is provided at the contact between the inner wall of the saddle clamp (8) and the outer surface of the fiber Bragg grating strain sensor (5).

5. The stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam according to claim 1, characterized in that: The left upper horizontal pipe (1), the right upper horizontal pipe (2), the left lower horizontal pipe (3) and the right lower horizontal pipe (4) are made of GFRP pipes.

6. The stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam according to claim 2, characterized in that: The fiber optic jumper interface (7) on the fiber Bragg grating strain sensor (5) is connected to the temperature compensator (9) through a fiber optic jumper.

7. The stress monitoring device for incremental launching construction of a steel-concrete composite continuous beam according to claim 6, characterized in that: An epoxy resin glue layer is provided between the fiber optic jumper interface (7) on the fiber Bragg grating strain sensor (5) and the outer surface of the horizontal pipe.

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