An anti-seismic reinforcement device for bridge piers and its detection system

Abstract

The present invention relates to the technical field of pier reinforcement, specifically a pier seismic reinforcement device and its detection system. The present invention includes a pier to be reinforced, and an assembly bottom plate and an assembly top plate are sleeved on the outer surface of the pier to be reinforced. The assembly top plate is arranged above the assembly bottom plate. A rectangular wrapping member is arranged on the outer surface of the pier. The rectangular wrapping member includes two parts on the left and right. Bottom plate brackets are fixedly connected to the four corners at the top of the assembly bottom plate and the four corners at the bottom of the assembly top plate. The pier seismic reinforcement device proposed by the present invention can achieve rapid reinforcement of the pier after an earthquake, meet the urgent reinforcement requirements of the bridge structure, avoid cumbersome procedures and long time, and can respond to post-disaster challenges at the fastest speed. The rapid reinforcement of the pier after an earthquake realizes the standardization and modularization of construction through modular design and prefabricated components, which not only improves the construction efficiency but also reduces the risks brought by human factors.

Description

Technical Field

[0001] The present invention relates to the technical field of pier reinforcement, and specifically to a pier seismic reinforcement device and its detection system. Background Art

[0002] As an important transportation hub connecting roads, railways, and waterways, bridges carry a huge traffic flow and transportation tasks. Their safety is directly related to the lives and property of the public. In earthquake-prone areas, the seismic resistance of bridges is particularly crucial. Ensuring that the structure reaches an appropriate safety level after an earthquake and quickly providing as much structural safety detection as possible after an earthquake can minimize the accident probability and safety risks, and ensure the safety and reliability of the bridge as a rescue and disaster relief hub after an earthquake.

[0003] In the prior art, the seismic reinforcement of piers mainly adopts the following methods: adding structures outside the piers: methods such as reinforced concrete layers, externally wrapped reinforced concrete sleeves, and longitudinal reinforcement to increase the bearing capacity and seismic performance of the piers.

[0004] However, the seismic reinforcement of piers in the prior art has the following defects: high reinforcement costs, during the reinforcement process, the bridge is closed for a long time, causing inconvenience to traffic, the reinforcement procedure is cumbersome, and there is a long reinforcement time, making it difficult to quickly resume bridge traffic. Summary of the Invention

[0005] The purpose of the present invention is to provide a pier seismic reinforcement device and its detection system to solve the problems raised in the above background art.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] An intelligent pier seismic reinforcement device includes a pier to be reinforced, and an assembly bottom plate and an assembly top plate are sleeved on the outer surface of the pier to be reinforced. The assembly top plate is arranged above the assembly bottom plate. A rectangular wrapping member is arranged on the outer surface of the pier, and the rectangular wrapping member includes two parts, left and right.

[0008] Four corners at the top of the assembly bottom plate and four corners at the bottom of the assembly top plate are fixedly connected with bottom plate brackets. Four subsidiary brackets are fixedly connected to both sides of the rectangular wrapping member. A structural hydraulic rod is rotatably connected to the bottom plate bracket, and the end of the structural hydraulic rod far from the bottom plate bracket is rotatably connected to the subsidiary bracket.

[0009] Preferably, longitudinal motors are fixedly installed at four corners of the assembly bottom plate. The output end of the longitudinal motor is fixedly connected with a longitudinal working screw rod, and the longitudinal working screw rod is threadedly connected with the assembly top plate for adjusting the height of the assembly top plate.

[0010] Preferably, an acceleration sensor is fixedly installed on the bottom plate support, and the acceleration sensor is used to receive the acceleration signal in real time when the reinforced bridge pier vibrates.

[0011] Preferably, a first transverse motor is fixedly installed on both the assembly bottom plate and the assembly top plate. The output end of the first transverse motor is fixedly connected to a transverse working screw. There is a steel backing plate at the connection between the transverse working screw and the bridge pier, and an ultrasonic detection device is fixedly installed on the steel backing plate.

[0012] Preferably, rubber pads are fixedly connected to one side of the two parts of the rectangular wrapping member that are close to each other.

[0013] A detection system for seismic reinforcement of bridge piers includes the following steps:

[0014] S1. Precast and manufacture the seismic reinforcement device;

[0015] S2. Rapid detection of bridge pier damage;

[0016] S3. Installation of the reinforcement device;

[0017] S4. Activate the acceleration sensor and transmit information;

[0018] S5. Data processing and damage prediction.

[0019] Advantages of the present invention:

[0020] 1. The seismic reinforcement device for bridge piers proposed by the present invention can achieve rapid reinforcement of bridge piers after an earthquake. Facing the urgent reinforcement needs of bridge structures, it avoids cumbersome procedures and long time, and can respond to post-disaster challenges at the fastest speed. The rapid reinforcement of bridge piers after an earthquake realizes the standardization and modularization of construction through modular design and precast components. This not only improves the construction efficiency, but also reduces the risks brought by human factors, ensuring the high-quality completion of the reinforcement operation.

[0021] 2. The detection system for seismic reinforcement of bridge piers adopted in the present invention can adjust the reinforcement plan in time by monitoring the changes of the bridge pier in real time to ensure the maximization of the reinforcement effect. This intelligent monitoring system can not only respond quickly to the changes of the bridge pier, but also continuously monitor after reinforcement to provide long-term safety guarantee. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0023] Figure 1It is the front view of the post-earthquake reinforcement device in the present invention;

[0024] Figure 2 It is the schematic diagram of the climbing of the post-earthquake reinforcement device in the present invention;

[0025] Figure 3 It is the schematic diagram of the bottom plate of the post-earthquake reinforcement device in the present invention;

[0026] Figure 4 It is the top view of the bottom plate of the pier seismic reinforcement device in the present invention;

[0027] Figure 5 It is the perspective view of the longitudinal motor and the working screw of the pier seismic reinforcement device in the present invention;

[0028] Figure 6 It is the schematic diagram of the pier seismic wrapping device in the present invention;

[0029] Figure 7 It is the schematic flow diagram of the detection system for pier seismic reinforcement proposed by the present invention.

[0030] The reference numerals in the figure are as follows:

[0031] 1. Assembly bottom plate, 2. Longitudinal motor, 3. Longitudinal working screw, 4. Assembly top plate, 5. Structural hydraulic rod, 6. Bottom plate bracket, 7. Auxiliary bracket, 8. Wrapping member, 9. Pier to be reinforced, 10. First transverse motor, 11. Transverse working screw, 12. Steel backing plate, 13. Ultrasonic detection device, 14. Damaged area of the wrapped pier, 15. Acceleration sensor, 16. Rubber pad. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0033] An intelligent pier seismic reinforcement device includes a pier 9 to be reinforced, an assembly bottom plate 1 and an assembly top plate 4 are sleeved on the outer surface of the pier 9 to be reinforced, the assembly top plate 4 is arranged above the assembly bottom plate 1, and a rectangular wrapping member 8 is arranged on the outer surface of the pier 9. The rectangular wrapping member 8 includes two parts on the left and right.

[0034] Four corner positions at the top of the said assembly bottom plate 1 and four corner positions at the bottom of the assembly top plate 4 are fixedly connected with bottom plate brackets 6. Four accessory brackets 7 are fixedly connected to both sides of the rectangular wrapping member 8. A structural hydraulic rod 5 is rotatably connected to the bottom plate bracket 6. One end of the structural hydraulic rod 5 away from the bottom plate bracket 6 is rotatably connected to the accessory bracket 7.

[0035] Four longitudinal motors 2 are fixedly installed at four corner positions of the said assembly bottom plate 1. The output end of the longitudinal motor 2 is fixedly connected with a longitudinal working screw rod 3. The longitudinal working screw rod 3 is in threaded connection with the assembly top plate 4 for adjusting the height of the assembly top plate 4.

[0036] An acceleration sensor 15 is fixedly installed on the said bottom plate bracket 6. The acceleration sensor 15 is used for receiving the acceleration signal in real time when the reinforced bridge pier 9 vibrates.

[0037] The said assembly bottom plate 1, assembly top plate 4 and rectangular wrapping member 8 are all prefabricated.

[0038] One - way horizontal motors 10 are fixedly installed on both the said assembly bottom plate 1 and assembly top plate 4. The output end of the one - way horizontal motor 10 is fixedly connected with a horizontal working screw rod 11. There is a steel backing plate 12 at the connection of the horizontal working screw rod 11 and the bridge pier. An ultrasonic detection device 13 is fixedly installed on the steel backing plate 12.

[0039] Rubber pads 16 are fixedly connected to the mutually - approaching sides of the two parts of the said rectangular wrapping member 8.

[0040] Installation of the bridge pier seismic reinforcement system:

[0041] After an earthquake, organize personnel to conduct a comprehensive inspection of the damaged condition of the bridge, and use means such as a bridge inspection vehicle to check the damaged conditions of the lower structure, bearings, beam body, etc. of the bridge. Carry out construction preparations at the damaged parts of the bridge, clean the surface debris, ensure the safety of the construction environment, and carry out installation, fixation and other processes of the post - earthquake reinforcement device according to the design scheme and the damage location.

[0042] After the installation of the bridge pier seismic reinforcement device is completed, activate the acceleration sensor 15 for data extraction and monitoring. Receive the acceleration signal in real time through the acceleration sensor 15 installed on the bottom plate bracket 6. Use the uncertainty damage prediction model to accurately locate and divide the bridge network into categories with shared equivalent damage trends, so as to obtain more accurate predictions and increase the inspection frequency to monitor the health status of the bridge pier. These more reliable models can assist the decision - making process of the bridge management system (BMS).

[0043] The working principle of a bridge pier seismic reinforcement system provided by the present invention is as follows:

[0044] Construction workers place the main components of the reinforcement device at the bottom of the damaged pier according to the design plan, place the assembly bottom plate 1, adjust the distance between the two assembly bottom plates 1 to reach the designed distance, and successively install the bottom plate support 6, the structural hydraulic rod 5, and the longitudinal working screw 3. Place the assembly top plate 4 on the longitudinal working screw 3, insert the longitudinal working screw 3 into the assembly top plate 4 for connection. Finally, connect the two parts of the wrapping member 8 to the structural hydraulic rods 5 on both sides respectively. Operate the first transverse motor 10 on the bottom plate to clamp the pier 9 with the transverse working screw 11 on the bottom plate, so as to fix the device. The longitudinal motor 2 works, the longitudinal working screw 3 extends, the assembly top plate 4 is lifted, and the structural hydraulic rod 5 extends accordingly, keeping the wrapping member 8 in the middle of the device all the time. Operate the first transverse motor 10 on the assembly top plate 4 to clamp the pier with the transverse working screw 11 on the assembly top plate 4, loosen the transverse working screw 11 on the assembly bottom plate 1, the longitudinal motor 2 works, the longitudinal working screw 3 is shortened, and the assembly bottom plate 1 is pulled up to complete one climb of the reinforcement device. After the reinforcement device climbs to the pier damage area 14, operate the first transverse motor 10 at the same time, the transverse working screw 11 clamps the pier, the structural hydraulic rod 5 extends, and the wrapping member 8 is closed to wrap the pier damage area 14 to ensure that the wrapping member 8 and the pier 9 are in close contact, completing the installation of the device. According to the data extracted and monitored by the acceleration sensor 15 and the ultrasonic detection device 13, calculate the damage probability, evaluate the states of different damage areas at each stage, and select to pass, restrict passage or prohibit according to the existing state.

[0045] A detection system for seismic reinforcement of piers includes the following steps:

[0046] S1. Prefabricate and manufacture the seismic reinforcement device;

[0047] Structural design and fabrication of the reinforcement device: According to the size and reinforcement requirements of the bridge area, fabricate the prefabricated reinforcement structure, including the structural form, size, and material selection. Fabricate the prefabricated components in the factory or production base according to the design drawings and specification requirements, including the post-earthquake reinforcement main body, assembly bottom plate 1, structural hydraulic rod 5, etc. Conduct quality inspection on the fabricated prefabricated components to ensure compliance with the design requirements and relevant standards, and conduct detail processing on the prefabricated components, including weld processing, surface anti-corrosion treatment, etc.

[0048] S2. Rapid detection of pier damage;

[0049] Conduct data collection: Collect sensor data of objects including damaged and normal states, and preprocess the collected data, including denoising, signal enhancement, feature extraction, etc., for subsequent model training and detection. Use machine learning and deep learning algorithms to train the model to identify the features of damage. Utilize the trained model to conduct damage detection on new data. The model will analyze the input data and output information such as the location, type, and severity of the damage.

[0050] S3. Installation of reinforcement device;

[0051] Prepare and transport the precast components, connectors, bolts, welding equipment and other materials and tools required for the reinforcement device. Subsequently, carry out the preparatory work on the pier foundation, including cleaning the damaged parts, ensuring the safety of the construction area, installing the reinforcement components. According to the design drawings and construction plan, install the reinforcement components on the pier. Lifting equipment can be used for lifting and positioning. After installing the reinforcement components, connect and fix between the components to ensure the stability and firmness of the reinforcement device. This includes methods such as welding, bolt connection, and weld treatment. Finally, inspect and accept the installed reinforcement device to ensure compliance with the design requirements and construction standards. Complete the installation work of the reinforcement device and deliver it for use.

[0052] S4. Activate the acceleration sensor 15 and conduct information transmission;

[0053] S5. Data processing and damage prediction.

[0054] Process the data collected during operation, use the model to identify the correlation between data features and damage, analyze and predict the newly collected data to judge the possible damage conditions in the structure. Evaluate the damage prediction results, including the evaluation of indicators such as damage location, damage degree, and future state. Apply the established model to real-time data monitoring to achieve real-time prediction and monitoring of structural damage.

[0055] Damage prediction model:

[0056] This system applies an uncertainty damage prediction model to predict pier damage.

[0057] In a one-dimensional convolutional neural network, depth representative features hidden in the original measurement signal can be extracted by setting the convolutional layer, while the bidirectional LSTM (Long Short-Term Memory network) can learn the bidirectional dependencies on long sequences. Therefore, combining the one-dimensional convolutional neural network with the bidirectional LSTM solves the problem that traditional features cannot be effectively utilized.

[0058] Secondly, in order to characterize the uncertainty of damage prediction during vibration, a quantile regression (QR) layer is embedded in the construction of the bidirectional LSTM network, and at the same time, kernel density estimation (KDE) is included, which can derive the probability density of the prediction points at each damage stage. By this method, an effective damage prediction model is established with reliable uncertainty management.

[0059] Evaluation of bridge operation status:

[0060] Through the above method, the pier damage assessment process based on the damage prediction model is obtained. Then, the real-time signal is input into the model for damage prediction to conduct real-time assessment of the operation safety of the bridge. By monitoring the structural health status of the bridge, problems and potential hazards existing in the bridge can be discovered in time, early warnings can be given, and possible safety risks and accidents can be prevented in advance, ensuring the safety and reliability of the bridge as a lifeline for disaster relief and rescue.

[0061] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A bridge pier seismic reinforcement device, comprising a reinforced bridge pier (9), characterized in that: The outer surface of the reinforced bridge pier (9) is provided with an assembly bottom plate (1) and an assembly top plate (4), the assembly top plate (4) is arranged above the assembly bottom plate (1), and the outer surface of the bridge pier (9) is provided with a rectangular wrapping member (8), the rectangular wrapping member (8) comprising two left and right parts; The four corners at the top of the assembly bottom plate (1) and the four corners at the bottom of the assembly top plate (4) are fixedly connected to bottom plate brackets (6), and the two sides of the rectangular wrapping member (8) are fixedly connected to four auxiliary brackets (7). The bottom plate bracket (6) is rotatably connected to a structural hydraulic rod (5), and one end of the structural hydraulic rod (5) away from the bottom plate bracket (6) is rotatably connected to the auxiliary bracket (7); A longitudinal motor (2) is fixedly mounted at each of the four corners of the assembly bottom plate (1); a longitudinal working screw (3) is fixedly connected to the output end of the longitudinal motor (2); the longitudinal working screw (3) is threadedly connected to the assembly top plate (4) for adjusting the height of the assembly top plate (4); An acceleration sensor (15) is fixedly mounted on the base plate bracket (6), and the acceleration sensor (15) is used to receive acceleration signals in real time when the reinforced bridge pier (9) vibrates; A first transverse motor (10) is fixedly mounted on both the assembly bottom plate (1) and the assembly top plate (4); a transverse working screw (11) is fixedly connected to the output end of the first transverse motor (10); a steel pad (12) is provided at the connection between the transverse working screw (11) and the bridge pier; and an ultrasonic detection device (13) is fixedly mounted on the steel pad (12).

2. The bridge pier seismic reinforcement device according to claim 1, characterized in that: A rubber pad (16) is fixedly connected to one side of the two parts of the rectangular wrapping member (8) that are close to each other.

3. A bridge pier seismic reinforcement device according to claim 1 or 2, characterized in that: The detection system of the bridge pier seismic reinforcement device comprises the following steps: S1. Prefabrication and manufacture of seismic reinforcement devices; S2. Rapid detection of bridge pier damage; S3, installation of reinforcement device; S4, the acceleration sensor (15) is activated and transmits information; S5. Data processing and damage prediction.

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