Pre-embedded assembly for monitoring stress of high-speed bridge structure

Abstract

The utility model relates to the technical field of bridge monitoring tools, in particular to a high-speed bridge structure stress monitoring embedded assembly which comprises a rigid sleeve, a flexible dowel bar is installed at the upper end of the rigid sleeve, a plurality of horizontally-arranged steel bars are installed on the outer wall of one side of the rigid sleeve, and the top end of the flexible dowel bar makes contact with a bridge stress face of a bridge body. A cavity is formed in the rigid sleeve and used for installing a stress sensor, and stress generated by the stress face of the bridge is transmitted to the stress sensor through the flexible dowel bar. According to the stress monitoring embedded assembly for the high-speed bridge structure, due to the combined design of the flexible dowel bar and the rigid sleeve, the stress generated by the stress surface of the bridge can be efficiently and accurately transmitted to the stress sensor. The flexible dowel bar is made of a stainless steel material, the flexibility of the flexible dowel bar can well adapt to tiny deformation of a bridge structure, the problem of stress transmission distortion caused by the fact that the structural rigidity cannot adapt to deformation is avoided, and the accuracy of monitoring data is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge monitoring tools, and more specifically, to a pre-embedded component for monitoring the structural stress of high-speed bridges. Background Technology

[0002] With the booming development of transportation, the safety and stability of highway bridges, as key nodes in the transportation network, are of paramount importance. During long-term operation, bridges are subjected to a combination of factors, including vehicle loads, environmental factors (such as temperature and humidity changes), and structural aging, causing continuous changes in their structural stress state. If bridge structural stress is not monitored in a timely and accurate manner, and the stress exceeds the bridge's load-bearing capacity, it could potentially lead to serious accidents such as bridge damage or even collapse, posing a significant threat to people's lives and property. Therefore, real-time and accurate monitoring of the structural stress of highway bridges is of great significance.

[0003] Currently, in the field of bridge structural stress monitoring, pre-embedded components are commonly used to monitor the internal stress of bridges. However, traditional pre-embedded components have revealed numerous problems in practical applications. For example, the rigid structural design of some pre-embedded components makes them unable to adapt well to minor deformations in the bridge structure, leading to inaccurate stress transmission and significant errors in the monitoring data. Furthermore, the connection between some pre-embedded components and the bridge structure is not robust enough, and they are prone to loosening under long-term, complex stress environments, thus affecting the reliability and stability of the entire monitoring system. Utility Model Content

[0004] The purpose of this invention is to provide a pre-embedded component for stress monitoring of high-speed bridge structures, in order to solve the problem that the rigid structural design of some pre-embedded components mentioned in the background art makes them unable to adapt well when the bridge structure undergoes minor deformation, resulting in inaccurate stress transmission and large errors in the monitoring data.

[0005] To achieve the above objectives, this utility model provides a pre-embedded component for stress monitoring of high-speed bridge structures, including a rigid sleeve. A flexible force transmission rod is installed at the upper end of the rigid sleeve, and several horizontally arranged reinforcing bars are installed on one outer wall of the rigid sleeve. The top end of the flexible force transmission rod contacts the stress-bearing surface of the bridge body. A cavity is provided inside the rigid sleeve for installing a stress sensor. The stress generated on the stress-bearing surface of the bridge is transmitted to the stress sensor through the flexible force transmission rod. A wiring terminal is installed at the bottom end of the stress sensor, and the wiring terminal is connected to an external data acquisition device.

[0006] This setup features a rigid sleeve providing a stable support structure, flexible force transmission rods transferring stress from the bridge's load-bearing surface to internal stress sensors, steel reinforcement components connected to the bridge body, and wiring terminals enabling data transmission.

[0007] Preferably, the reinforcing bars are arranged in parallel at equal intervals from top to bottom, with one end of the reinforcing bar pre-embedded in the bridge body and the other end welded and fixed to the outer wall of the rigid sleeve.

[0008] This design uses parallel, equally spaced reinforcing bars to evenly distribute stress, and welding ensures connection strength.

[0009] Preferably, the rigid sleeve is made of carbon steel and the flexible force transmission rod is made of stainless steel.

[0010] This setup features a rigid carbon steel sleeve providing high-strength support, and a flexible stainless steel dowel bar that combines flexibility and corrosion resistance.

[0011] Preferably, the lower end of the flexible force transmission rod is located inside the rigid sleeve and is fitted with a limiting protrusion. The upper end of the rigid sleeve is detachably fitted with a limiting cover, which limits the limiting protrusion. The limiting cover has a hole in the middle for the flexible force transmission rod to pass through.

[0012] This feature includes a limiting protrusion that works in conjunction with a limiting cover to constrain the displacement range of the flexible force transmission rod.

[0013] Preferably, the top of the rigid sleeve is provided with a threaded end, the inner wall of the limiting cover is provided with an internal thread, and the threaded end is threadedly connected to the limiting cover.

[0014] This threaded connection design facilitates the installation and removal of components.

[0015] Preferably, a force-transmitting end is installed at the lower end of the flexible force-transmitting rod near the stress sensor, and the force-transmitting end is in contact with the stress sensor.

[0016] This setting increases the contact area between the force transmission end and the stress sensor.

[0017] Preferably, a buffer spring is sleeved on the outside of the force transmission end, with the upper end of the buffer spring abutting against the limiting protrusion and the lower end of the buffer spring abutting against the upper end of the rigid sleeve.

[0018] This feature incorporates a buffer spring to absorb vibration energy and reduce dynamic load interference.

[0019] Preferably, the top of the flexible force transmission rod is provided with a tapered force-bearing end that is adapted to the inclined surface of the bridge's force-bearing surface.

[0020] This feature incorporates a design that adapts the tapered stress-bearing end to the inclined surface, optimizing stress distribution.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] In this high-speed bridge structural stress monitoring embedded component, the combination of a flexible dowel bar and a rigid sleeve ensures that stress generated on the bridge's load-bearing surface is efficiently and accurately transmitted to the stress sensor. The flexible dowel bar, made of stainless steel, is flexible enough to adapt well to minor deformations in the bridge structure. Compared to traditional rigid embedded components, this avoids stress transmission distortion caused by the structural rigidity's inability to adapt to deformation, significantly improving the accuracy of monitoring data. Simultaneously, the tapered force-bearing end of the flexible dowel bar matches the inclined surface of the bridge's load-bearing surface, increasing the contact area and further optimizing the stress transmission path, ensuring that stress is quickly and completely transmitted to the stress sensor.

[0023] Several horizontal reinforcing bars are installed on one side of the outer wall of the rigid sleeve, arranged parallel and at equal intervals from top to bottom. One end of each bar is pre-embedded into the bridge body, and the other end is welded and fixed to the rigid sleeve. This connection method significantly enhances the connection strength and stability between the pre-embedded component and the bridge body. Compared with traditional pre-embedded components with unstable connections, it can effectively resist the influence of complex stress environments (such as frequent vibration and temperature stress) during the long-term operation of the bridge, prevent the pre-embedded component from loosening or falling off, ensure the long-term reliable operation of the monitoring system, extend the service life of the component, and reduce the later maintenance costs and monitoring risks.

[0024] The limiting protrusion at the lower end of the flexible force transmission rod, in conjunction with the detachable limiting cap at the upper end of the rigid sleeve, precisely limits the flexible force transmission rod, preventing it from shifting during stress transmission and ensuring the stability of stress transmission. Simultaneously, the buffer spring sleeved externally at the force transmission end acts as a buffer and damper during stress transmission, reducing interference from bridge vibrations on the monitoring data and further improving the reliability and stability of the monitoring data. Furthermore, the rigid sleeve, made of carbon steel, possesses good strength and rigidity, providing a stable and reliable installation space for the stress sensor and ensuring its normal and accurate operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model in use;

[0026] Figure 2 This is a partial structural schematic diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the flexible force transmission rod in this utility model;

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Rigid sleeve; 11. Threaded end; 12. Limiting cap; 2. Flexible force transmission rod; 21. Limiting protrusion; 22. Force transmission end; 23. Buffer spring; 24. Conical force-bearing end; 3. Reinforcing bar; 4. Bridge body; 41. Bridge stress surface; 5. Stress sensor; 6. Wiring terminal. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model provides a pre-embedded component for stress monitoring of high-speed bridge structures, such as... Figure 1 , Figure 2 As shown, the structure includes a rigid sleeve 1, a flexible force transmission rod 2 installed at the upper end of the rigid sleeve 1, and several horizontally arranged steel bars 3 installed on one outer wall of the rigid sleeve 1. The top end of the flexible force transmission rod 2 contacts the bridge stress surface 41 of the bridge body 4. A cavity is provided inside the rigid sleeve 1 for installing a stress sensor 5. The stress generated by the bridge stress surface 41 is transmitted to the stress sensor 5 through the flexible force transmission rod 2. A terminal 6 is installed at the bottom end of the stress sensor 5, and the terminal 6 is connected to an external data acquisition device.

[0032] The rigid sleeve 1 provides a stable mounting space for the stress sensor 5, and its internal cavity accommodates the stress sensor 5. A flexible force transmission rod 2 is installed at the upper end of the rigid sleeve 1. When stress is generated on the bridge stress-bearing surface 41 of the bridge body 4, the flexible force transmission rod 2 transmits the stress to the stress sensor 5. A horizontal reinforcing bar 3 on one side of the outer wall of the rigid sleeve 1 enhances the connection between the embedded components and the bridge body 4. A wiring terminal 6 is installed at the bottom of the stress sensor 5, connecting to external data acquisition equipment for data transmission. Through the coordinated operation of the rigid sleeve 1, flexible force transmission rod 2, and reinforcing bar 3, a stable stress transmission and monitoring path is formed, ensuring accurate acquisition of stress data on the bridge stress-bearing surface 41, providing a reliable basis for bridge safety assessment.

[0033] In this embodiment, as Figure 1 , Figure 2 As shown, the reinforcing bars 3 are arranged in parallel at equal intervals from top to bottom. One end of the reinforcing bar 3 is pre-embedded into the bridge body 4, and the other end is welded and fixed to the outer wall of the rigid sleeve 1.

[0034] The reinforcing bars 3 are arranged parallel to each other and at equal intervals from top to bottom, which allows for uniform stress distribution. One end of the reinforcing bar 3 is pre-embedded into the bridge body 4, and the other end is welded and fixed to the outer wall of the rigid sleeve 1, forming a strong mechanical connection. This ensures a tight connection between the rigid sleeve 1 and the bridge body 4, enhances the stability of the pre-embedded components under complex stress environments, effectively resists external forces such as vibration and loads, extends the service life of the components, and reduces monitoring errors caused by loose connections.

[0035] Specifically, the rigid sleeve 1 is made of carbon steel, and the flexible force transmission rod 2 is made of stainless steel.

[0036] The rigid sleeve 1 is made of carbon steel, utilizing its high strength and rigidity to provide a stable support structure for the stress sensor 5. The flexible force transmission rod 2 is made of stainless steel, which combines good flexibility and corrosion resistance. Its flexibility allows it to adapt to minor deformations in the bridge structure, while its corrosion resistance ensures long-term stable operation in complex environments. By optimizing the component material properties, the rigid sleeve 1 ensures the stable installation of the stress sensor 5, and the flexible force transmission rod 2 ensures accurate stress transmission, while simultaneously improving the overall durability and environmental adaptability of the components.

[0037] Furthermore, such as Figure 3 As shown, the lower end of the flexible force transmission rod 2 is located inside the rigid sleeve 1 and is equipped with a limiting protrusion 21. The upper end of the rigid sleeve 1 is detachably equipped with a limiting cover 12, which limits the limiting protrusion 21. The limiting cover 12 has a hole in the middle for the flexible force transmission rod 2 to pass through.

[0038] The limiting protrusion 21 at the lower end of the flexible force transmission rod 2 cooperates with the detachable limiting cover 12 at the upper end of the rigid sleeve 1. The hole in the middle of the limiting cover 12 allows the flexible force transmission rod 2 to pass through. By limiting the limiting protrusion 21 through the limiting cover 12, the displacement range of the flexible force transmission rod 2 within the rigid sleeve 1 is constrained. This prevents the flexible force transmission rod 2 from shifting or shaking during stress transmission, ensuring that the stress can be accurately transmitted to the stress sensor 5 along the preset path, thereby improving the accuracy and stability of the monitoring data.

[0039] Furthermore, such as Figure 2 As shown, the top of the rigid sleeve 1 is provided with a threaded end 11, and the inner wall of the limiting cover 12 is provided with an internal thread. The threaded end 11 is threadedly connected to the limiting cover 12.

[0040] The threaded end 11 at the top of the rigid sleeve 1 engages with the internal thread on the inner wall of the limiting cover 12, thereby achieving a detachable connection between the limiting cover 12 and the rigid sleeve 1 through the threaded connection. This facilitates quick disassembly and installation of the limiting cover 12 during the installation of the stress sensor 5, the flexible force transmission rod 2, or component maintenance, simplifying construction and maintenance procedures, improving work efficiency, and reducing operational difficulty.

[0041] Furthermore, such as Figure 2 , Figure 3 As shown, a force transmission end 22 is installed at the lower end of the flexible force transmission rod 2 near the stress sensor 5, and the force transmission end 22 is in contact with the stress sensor 5.

[0042] A force transmission end 22 is installed at the lower end of the flexible force transmission rod 2 near the stress sensor 5. The force transmission end 22 is in direct contact with the stress sensor 5, increasing the contact area for stress transmission and enabling stress to be transmitted more efficiently from the flexible force transmission rod 2 to the stress sensor 5. This improves stress transmission efficiency, enhances the stress sensor 5's ability to detect minute stress changes, improves the sensitivity of the monitoring system, and ensures timely and accurate acquisition of bridge stress data.

[0043] Furthermore, such as Figure 2 , Figure 3 As shown, a buffer spring 23 is sleeved on the outside of the force transmission end 22. The upper end of the buffer spring 23 abuts against the limiting protrusion 21, and the lower end of the buffer spring 23 abuts against the upper end of the rigid sleeve 1.

[0044] A buffer spring 23, externally sleeved on the force transmission end 22, abuts against the limiting protrusion 21 at its upper end and against the upper end of the rigid sleeve 1 at its lower end. When the bridge structure vibrates or experiences dynamic loads, the buffer spring 23 absorbs vibration energy through compression and rebound, reducing the impact of vibration on the flexible force transmission rod 2 and the stress sensor 5. This effectively filters dynamic interference such as bridge vibration and vehicle impacts, reduces the impact of environmental noise on monitoring data, and allows the data acquired by the stress sensor 5 to more accurately reflect the actual stress state of the bridge, improving the reliability and stability of the monitoring data.

[0045] Furthermore, such as Figure 1 , Figure 3 As shown, the top of the flexible force transmission rod 2 is provided with a tapered force-bearing end 24 that is adapted to the inclined surface of the bridge force-bearing surface 41.

[0046] The tapered force-bearing end 24 at the top of the flexible force transmission rod 2 is adapted to the inclined surface of the bridge's stress-bearing surface 41. This shape design allows stress to be more evenly distributed across the flexible force transmission rod 2 when applied to the tapered force-bearing end 24, avoiding stress concentration. This reduces damage to the components caused by stress concentration, extends the service life of the flexible force transmission rod 2 and the embedded components, and optimizes stress transmission, improving the accuracy and precision of stress monitoring.

[0047] When the pre-embedded component for stress monitoring of high-speed bridge structures of this utility model is in use, stress will first be generated on the bridge stress-bearing surface 41 of the bridge body 4 under the action of external forces such as vehicle load and environmental factors. At this time, the conical stress-bearing end 24 at the top of the flexible force transmission rod 2 is closely attached to the inclined surface of the bridge stress-bearing surface 41. Due to the matching shape of the two, the stress can be evenly applied to the conical stress-bearing end 24, avoiding stress concentration.

[0048] Stress is transmitted to the flexible force transmission rod 2 through the tapered force-bearing end 24. The flexible force transmission rod 2 is made of stainless steel and has good flexibility, which can adapt to the slight deformation of the bridge structure, thereby ensuring that the stress can be stably transmitted downward along the flexible force transmission rod 2. During the transmission process, the limiting protrusion 21 at the lower end of the flexible force transmission rod 2 cooperates with the limiting cover 12 at the upper end of the rigid sleeve 1 to limit the displacement range of the flexible force transmission rod 2, prevent it from deviating or shaking during stress transmission, and ensure the accuracy of the stress transmission path.

[0049] The force-transmitting end 22 of the flexible force-transmitting rod 2, located near the stress sensor 5, directly contacts the stress sensor 5, increasing the contact area for stress transmission and enabling efficient stress transfer to the stress sensor 5. Simultaneously, the buffer spring 23, sleeved externally on the force-transmitting end 22, plays a crucial role when the bridge structure experiences vibration or dynamic loads. The upper end of the buffer spring 23 abuts against the limiting protrusion 21, and the lower end abuts against the upper end of the rigid sleeve 1. Through compression and rebound, it absorbs vibration energy, reducing interference from vibration on the flexible force-transmitting rod 2 and the stress sensor 5, ensuring the accuracy and reliability of the data acquired by the stress sensor 5.

[0050] The stress sensor 5 is installed in the cavity inside the rigid sleeve 1. The rigid sleeve 1 is made of carbon steel, which has high strength and rigidity, providing a stable installation environment for the stress sensor 5. After receiving the transmitted stress, the stress sensor 5 converts it into identifiable data such as electrical signals.

[0051] Finally, the terminal 6 at the bottom of the stress sensor 5 is connected to an external data acquisition device. The terminal 6 transmits the data generated by the stress sensor 5 to the data acquisition device, which collects, processes and analyzes the data, thereby realizing real-time monitoring of the stress of the high-speed bridge structure and providing accurate data support for the safety assessment and maintenance management of the bridge.

[0052] Throughout the entire operation, the horizontal reinforcing bars 3 on one side of the outer wall of the rigid sleeve 1 play a crucial role. The reinforcing bars 3 are arranged parallel and evenly spaced from top to bottom, with one end pre-embedded into the bridge body 4 and the other end welded and fixed to the outer wall of the rigid sleeve 1. This connection method enhances the connection strength and stability between the pre-embedded component and the bridge body 4, enabling the component to stably withstand the stress transmitted by the bridge and maintain reliable operation under long-term complex stress conditions.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pre-embedded component for stress monitoring of high-speed bridge structures, comprising a rigid sleeve (1), characterized in that: A flexible force transmission rod (2) is installed at the upper end of the rigid sleeve (1). Several horizontally arranged steel bars (3) are installed on one side of the outer wall of the rigid sleeve (1). The top end of the flexible force transmission rod (2) is in contact with the bridge stress surface (41) of the bridge body (4). A cavity is provided inside the rigid sleeve (1) for installing a stress sensor (5). The stress generated by the bridge stress surface (41) is transmitted to the stress sensor (5) through the flexible force transmission rod (2). A terminal (6) is installed at the bottom end of the stress sensor (5). The terminal (6) is connected to an external data acquisition device.

2. The embedded component for stress monitoring of high-speed bridge structures according to claim 1, characterized in that: The steel bars (3) are arranged in parallel and at equal intervals from top to bottom. One end of the steel bar (3) is pre-embedded in the bridge body (4), and the other end is welded and fixed to the outer wall of the rigid sleeve (1).

3. The embedded component for stress monitoring of high-speed bridge structures according to claim 1, characterized in that: The rigid sleeve (1) is made of carbon steel, and the flexible force transmission rod (2) is made of stainless steel.

4. The embedded component for stress monitoring of high-speed bridge structures according to claim 1, characterized in that: The lower end of the flexible force transmission rod (2) is located inside the rigid sleeve (1) and is fitted with a limiting protrusion (21). The upper end of the rigid sleeve (1) is detachably fitted with a limiting cover (12). The limiting cover (12) limits the limiting protrusion (21). The middle part of the limiting cover (12) is provided with a hole for the flexible force transmission rod (2) to pass through.

5. The embedded component for stress monitoring of high-speed bridge structures according to claim 4, characterized in that: The rigid sleeve (1) has a threaded end (11) at its top, and the inner wall of the limiting cover (12) has an internal thread. The threaded end (11) is threadedly connected to the limiting cover (12).

6. The embedded component for stress monitoring of high-speed bridge structures according to claim 4, characterized in that: The lower end of the flexible force transmission rod (2) is equipped with a force transmission end (22) near the stress sensor (5), and the force transmission end (22) is in contact with the stress sensor (5).

7. The embedded component for stress monitoring of high-speed bridge structures according to claim 6, characterized in that: A buffer spring (23) is sleeved on the outside of the force transmission end (22). The upper end of the buffer spring (23) abuts against the limiting protrusion (21), and the lower end of the buffer spring (23) abuts against the upper end of the rigid sleeve (1).

8. The embedded component for stress monitoring of high-speed bridge structures according to claim 1, characterized in that: The top of the flexible force transmission rod (2) is provided with a tapered force-bearing end (24) that is adapted to the inclined surface of the bridge force-bearing surface (41).

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