Intelligent monitoring system for bridge construction, operation and maintenance

Abstract

The utility model discloses an intelligent monitoring system for bridge construction, operation and maintenance, which belongs to the technical field of bridge monitoring and comprises a far-end monitoring control center, a project data transceiving middle end, a three-dimensional laser scanner and a plurality of sensor assemblies. The plurality of sensor assemblies are dispersedly arranged on all parts of a bridge, and the project data transceiving middle end is connected with the three-dimensional laser scanner, the sensor assemblies and the remote monitoring control center. And the sensor assembly is used for receiving monitoring data transmitted by the three-dimensional laser scanner and the sensor assembly and transmitting the monitoring data to the remote monitoring control center. The bridge construction, operation and maintenance intelligent monitoring system provided by the utility model can comprehensively and accurately monitor the health condition of the bridge in real time, discover the damage and abnormity of the bridge in time, and provide effective monitoring data for the maintenance and repair of the bridge.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge monitoring, and particularly relates to an intelligent monitoring system for bridge construction, operation and maintenance. Background Technique

[0002] With the development of the economy and the acceleration of the urbanization process, bridges, as important transportation hubs, play an increasingly important role in modern society. The health status of bridges is directly related to people's life and property safety and the smoothness of traffic. However, due to the harsh natural working environment of bridges, the variation of building materials affected by the environment and time, and some other adverse accidental factors, the bridge structure will be damaged and its function will degenerate before reaching the designed service life. If it cannot be maintained and repaired in time, it will not only affect driving safety, shorten the service life of the bridge, but even lead to serious damage and collapse of the bridge. Traditional bridge detection methods often rely on manual inspections, which have problems such as low efficiency, discontinuous data, and difficulty in real-time monitoring.

[0003] In order to ensure the structural safety during the bridge construction - operation period and strive to improve the bridge management and maintenance level, it is urgent to research and apply more advanced, scientific modern bridge management and maintenance means, methods and technologies, construct an intelligent, information-based and networked bridge safety monitoring system, and timely monitor the health status of the bridge structure. Therefore, researching and developing an intelligent monitoring system for bridge construction, operation and maintenance is of great significance for ensuring the safe operation of bridges and extending their service life. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an intelligent monitoring system for bridge construction, operation and maintenance, which can monitor the health status of bridges in real time, comprehensively and accurately, timely monitor the damage and abnormalities of bridges, and provide effective monitoring data for the maintenance and repair of bridges.

[0005] To achieve the above purpose, the utility model is implemented by the following technical solution:

[0006] The utility model provides an intelligent monitoring system for bridge construction, operation and maintenance, including a remote monitoring and control center, a project data transceiver middle end, a three-dimensional laser scanner and a plurality of sensor components;

[0007] The plurality of sensor components are dispersedly arranged on various parts of the bridge, and the project data transceiver middle end is respectively connected to the three-dimensional laser scanner, the sensor components and the remote monitoring and control center, and is used for receiving the monitoring data transmitted by the three-dimensional laser scanner and the sensor components and transmitting it to the remote monitoring and control center.

[0008] Further, the sensor assembly includes a strain sensor, a displacement sensor, an acceleration sensor, a temperature sensor, and a humidity sensor.

[0009] Further, the strain sensor is disposed at least on the main beam, secondary beam, bridge bearings, bridge connectors, and joints of the bridge;

[0010] The displacement sensor is disposed at least on the main beam, secondary beam, and expansion joint of the bridge;

[0011] The acceleration sensor is disposed at least on the main beam, secondary beam, bridge bearings, and bridge piers of the bridge;

[0012] The temperature sensor is disposed at least on the surface of the bridge structure and inside the culvert.

[0013] Further, the project data receiving and transmitting middle end includes a data acquisition module, a signal conditioning module, a wireless communication module, a data storage module, and a power energy storage module;

[0014] The data acquisition module is used to receive the monitoring data transmitted by the sensor assembly and the three-dimensional laser scanner;

[0015] The signal conditioning module is used to perform signal preprocessing such as filtering and conversion on the received monitoring data;

[0016] The wireless communication module is used to transmit the preprocessed signal to the remote monitoring and control center;

[0017] The data storage module is used to store the received monitoring data and preprocessed signal;

[0018] The power energy storage module is used to provide electrical energy for each module of the project data receiving and transmitting middle end.

[0019] Further, the power energy storage module is configured with an external solar panel.

[0020] Further, the three-dimensional laser scanner uses a Leica ScanStation P50 scanner or a Trimble X7 scanner.

[0021] Further, a bridge BIM three-dimensional model database is configured in the remote monitoring and control center.

[0022] Compared with the prior art, the beneficial effects achieved by the present utility model:

[0023] The intelligent monitoring system for bridge construction, operation and maintenance provided by the present utility model comprehensively monitors the states of the bridge such as stress, deformation, vibration, temperature and humidity by arranging a variety of sensors at key parts of the bridge, including strain sensors, displacement sensors, acceleration sensors, temperature sensors and humidity sensors; performs high-precision three-dimensional scanning on the bridge structure by using a high-precision three-dimensional laser scanner; uses a wireless communication module to transmit the monitoring data to the remote monitoring and control center in real time to ensure the timeliness and continuity of the data; the intelligent monitoring system for bridge construction, operation and maintenance provided can also be applied to the construction monitoring, load test and operation health monitoring processes of the bridge, realizing the health monitoring and management of the entire life cycle of the bridge. Description of the Drawings

[0024] Figure 1 is a block diagram of an intelligent monitoring system for bridge construction, operation and maintenance according to an embodiment of the present utility model.

[0025] In the figure: 1, remote monitoring and control center; 2, project data receiving and transmitting middle end; 3, three-dimensional laser scanner; 4, sensor assembly. Detailed Embodiments

[0026] The present utility model will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0028] As Figure 1 shown, an intelligent monitoring system for bridge construction, operation and maintenance is provided in an embodiment of the present utility model, including a remote monitoring and control center, a project data receiving and transmitting middle end, a three-dimensional laser scanner and a plurality of sensor assemblies;

[0029] The plurality of sensor assemblies are dispersedly arranged on various parts of the bridge, and the project data receiving and transmitting middle end is respectively connected to the three-dimensional laser scanner, the sensor assembly and the remote monitoring and control center, and is used for receiving the monitoring data transmitted by the three-dimensional laser scanner and the sensor assembly and transmitting it to the remote monitoring and control center.

[0030] To meet the needs of highway bridge construction monitoring, improve the level of construction monitoring, and ensure project quality and safety, the "Technical Specification for Highway Bridge Construction Monitoring" (JTG / T 3650-01-2022) issued by the Ministry of Transport is applicable to the construction monitoring of newly built, renovated, and expanded bridges on highways of all grades. The parameters monitored in bridge construction are divided into two categories: geometric state parameters and internal force state parameters. When environmental parameters such as temperature and wind have an obvious impact on the structural geometric state or internal force state during the bridge construction process, the environmental parameters should be monitored. Among them, the geometric state parameters include foundation settlement, the alignment of the main girder, main arch, and main cable, as well as the deviation of the cable tower and pier; the internal force state parameters include the stress of the control sections of components such as the main girder, main arch, cable tower, and pier, and the internal forces of components such as the main cable, stay cable, suspension cable, and tie rod.

[0031] Construct a finite element model according to the structural form of the monitored bridge, taking into account all construction stages and operating conditions, and use finite element analysis to obtain key information such as the stress condition, most unfavorable section, and vibration mode of the bridge, providing guidance for the layout of the measuring points on the bridge.

[0032] In this embodiment, the sensor assembly includes a strain sensor, a displacement sensor, an acceleration sensor, a temperature sensor, and a humidity sensor.

[0033] The strain sensor is used to monitor the stress and strain of the bridge structure and is arranged at least at the bottom of the main girder and secondary girder of the bridge, bridge bearings, bridge connectors, and joints. Specifically, for the stress monitoring section of the pier and cable tower, the stress control section near the bottom surface of the pier and cable tower is preferably selected, and the number of measuring points for each section should not be less than 4. The stress monitoring points of the main girder are preferably arranged at the upper and lower edges of the main girder near the pier top, mid-span of the middle span, quarter points of the middle span, and other stress control sections, and the number of measuring points for each section should not be less than 4; the number of spans for stress monitoring of multi-span bridges should not be less than 2 spans. The stress monitoring points of the main arch ring of the arch bridge are preferably arranged at the upper and lower edges of the arch foot, quarter points, arch top, and other stress control sections, and the number of measuring points for each section should not be less than 4, and the number of spans for stress monitoring of multi-span bridges should not be less than 2 spans.

[0034] Displacement sensors are used to monitor the displacement changes of bridges, including vertical and horizontal displacements, and are arranged at least on the main girders, secondary girders and expansion joints of bridges. Specifically, the foundation settlement monitoring section should be set at the top surface of the foundation, and the number of measuring points in one section should not be less than 4. The monitoring sections for pier and pylon deviation should be set at the top surfaces of piers and pylons, and the number of measuring points in each section should not be less than 1. The monitoring sections for the main girders during cantilever construction should be set near the front ends of the top surfaces of each girder segment, and the number of measuring points in each section should not be less than 3; for the main girders constructed by other methods, the monitoring sections should be set at the supports, mid-spans and quarter points, and the number of measuring points in each section should not be less than 3. The monitoring sections for the main arch ring should be set at the arch feet, quarter points and arch crowns. When the span is greater than 100m, it is advisable to appropriately increase the monitoring sections, and the number of measuring points in each section should not be less than 2; for the main arch ring constructed in segments, 1 monitoring section should be set for each segment, and the number of measuring points in each section should not be less than 2; for multi-rib arch rings, the number of measuring points for each rib in the same section should not be less than 1. The monitoring sections for the deck alignment of the completed bridge should be set at the supports, mid-spans, quarter points and eighth points, and the number of measuring points in each section should not be less than 2.

[0035] Acceleration sensors are used to monitor the vibration conditions of bridges and are arranged at least on the main girders, secondary girders, bridge bearings and piers of bridges. Specifically, the measuring points for the vertical and lateral vibrations of the main girders should be determined according to the vibration modes of the main girders, and are preferably arranged at the peak points of the vibration modes, avoiding the vibration nodes; the measuring point positions should at least include the mid-span of the main span and 1 / 4 and 3 / 4 of the main span; the measuring points for the horizontal vibration monitoring of the tower top should be arranged bidirectionally at the tower top; the measuring points for the main arch vibration monitoring should be determined according to the vibration modes of the main arch, and are preferably arranged at the peak points of the vibration modes, avoiding the vibration nodes.

[0036] Temperature sensors are used to monitor the temperature changes of bridges because temperature affects the performance of materials, and are arranged at least on the surface of the bridge structure and inside the box culvert. Specifically, the temperature monitoring sections for steel box girders should be set at the standard girder segments, and the number of monitoring sections should not be less than 1. The measuring points should be arranged at the upper and lower positions on the outer surface of the steel box girder, and the number of measuring points in each section should not be less than 6. The temperature monitoring sections for concrete box girders should be set at typical cross-sections, and the measuring points should be arranged on the inner and outer perimeters of the box girder, and the number of measuring points in each section should not be less than 6.

[0037] Humidity sensors are used to monitor the environmental humidity because humidity affects the corrosion condition of bridges, and are mainly arranged on the surface of the bridge, especially in areas prone to moisture, such as the bridge deck and the lower parts of piers; and are arranged at the joints and cracks of the bridge to monitor the influence of humidity on the bridge structure.

[0038] Specifically, humidity sensors should be arranged on the inner and outer surfaces of the main and secondary beams to monitor changes in material properties caused by humidity variations. At least one sensor should be arranged in the inner chamber of each beam, especially at the corners and joints of the box girder. At least two sensors should be arranged on the outer surface, one on the upper part and one on the lower part of the beam. One humidity sensor should be arranged near each support to monitor the humidity conditions in the support area. One humidity sensor should be arranged at the top and bottom of each pier. If the pier is hollow inside, at least one more sensor should be arranged inside. One humidity sensor should be arranged at the inlet and outlet of the bridge drainage system, and humidity sensors should be arranged in maintenance holes and inspection holes for monitoring without damaging the bridge structure. Humidity sensors should be arranged above and around the soil of the bridge foundation to monitor the humidity conditions of the foundation and prevent erosion of the bridge foundation caused by excessive soil humidity.

[0039] In this embodiment, the project data transceiver includes a data acquisition module, a signal conditioning module, a wireless communication module, a data storage module, and a power energy storage module.

[0040] The data acquisition module is used to receive the monitoring data transmitted by the sensor assembly and the 3D laser scanner.

[0041] The signal conditioning module is used to perform conventional signal preprocessing such as filtering, conversion, and amplification on the received monitoring data.

[0042] The wireless communication module is used to transmit the preprocessed signal to the remote monitoring and control center, which can use cellular networks, satellite communication, or wireless local area networks, etc.

[0043] The data storage module is used to store the received monitoring data and preprocessed signals.

[0044] The power energy storage module is used to provide electrical energy for each module of the project data transceiver.

[0045] In this embodiment, the power energy storage module is configured with an external solar panel.

[0046] In this embodiment, the 3D laser scanning technology based on the laser ranging principle is used to obtain high-precision 3D point clouds containing spatial coordinates and surface information, realizing the rapid reconstruction of the 3D model of the monitored bridge. Among them, the 3D laser scanner uses the Leica ScanStation P50 scanner or the Trimble X7 scanner.

[0047] The remote monitoring and control center is configured with a bridge BIM three-dimensional model database. Based on the BIM three-dimensional model in the prior art, a bridge BIM management database and display platform with fine and intuitive bridge visualization and basic information are formed, and a three-dimensional model database with interconnected business data for construction progress simulation, structural informatization during the construction and operation and maintenance periods, construction and operation and maintenance safety monitoring, and monitoring information management during the operation and maintenance period is formed.

[0048] The remote monitoring and control center is also equipped with a console, a mobile terminal, a data visualization screen, and a data local database. Among them, the console is used for operators to monitor the bridge status and manage the system; the mobile terminal is wirelessly connected to the control center, allowing operators to remotely access the control center through a smartphone or tablet computer; the data visualization screen is used to display the 3D model of the bridge and real-time monitoring data, charts, and reports; the data local database is used to store historical data such as relevant operator permission information and monitoring data, facilitating long-term trend monitoring.

[0049] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent monitoring system for bridge construction, operation and maintenance, characterized in that, It includes a remote monitoring and control center, a project data transceiver middle end, a 3D laser scanner, and several sensor components; The several sensor components are dispersedly arranged on various parts of the bridge. The project data transceiver middle end is respectively connected to the 3D laser scanner, the sensor components, and the remote monitoring and control center, and is used to receive the monitoring data transmitted by the 3D laser scanner and the sensor components and transmit it to the remote monitoring and control center; The sensor components include strain sensors, displacement sensors, acceleration sensors, temperature sensors, and humidity sensors; The strain sensors are at least arranged on the main beam, secondary beam, bridge bearings, bridge connectors, and joints of the bridge; The displacement sensors are at least arranged on the main beam, secondary beam, and expansion joints of the bridge; The acceleration sensors are at least arranged on the main beam, secondary beam, bridge bearings, and bridge piers of the bridge; The temperature sensors are at least arranged on the surface of the bridge structure and inside the culvert; 2. The intelligent monitoring system for bridge construction, operation and maintenance according to claim 1, wherein The project data transceiver middle end includes a data acquisition module, a signal conditioning module, a wireless communication module, a data storage module, and a power energy storage module; The data acquisition module is used to receive the monitoring data transmitted by the sensor components and the 3D laser scanner; The signal conditioning module is used for signal preprocessing of filtering and conversion of the received monitoring data; The wireless communication module is used to transmit the preprocessed signal to the remote monitoring and control center; The data storage module is used to store the received monitoring data and preprocessed signals; The power energy storage module is used to provide electrical energy for each module of the project data transceiver middle end.

3. The intelligent monitoring system for bridge construction, operation and maintenance according to claim 2, wherein, The power energy storage module is configured with an external solar panel.

4. The intelligent monitoring system for bridge construction, operation and maintenance according to claim 1, characterized in that, The 3D laser scanner uses a Leica ScanStation P50 scanner or a Trimble X7 scanner.

5. The intelligent monitoring system for bridge construction, operation and maintenance according to claim 1, characterized in that, A bridge BIM 3D model database is configured in the remote monitoring and control center.

Images