A dynamic monitoring system for the construction alignment of the extended main tower of a suspension bridge

Abstract

The present invention provides a dynamic monitoring system for the construction alignment of an externally extended main tower of a suspension bridge, comprising: a data acquisition device for obtaining target data of the externally extended main tower during the construction process; a data processing module for analyzing the target data of the externally extended main tower to obtain the actual deformation amount at the current construction stage; a simulation module for the externally extended main tower of the suspension bridge, which is used to reverse deduce a preset completed bridge model of the suspension bridge that meets the safety standards according to the current construction steps, determine the simulated deformation amount of the externally extended main tower at the current construction stage, input the material data of the previous construction step before the preset completed bridge model of the suspension bridge enters the current construction step, and update it according to the material data; a main tower status monitoring module for obtaining the actual deformation amount and the simulated deformation amount, and determining the linear change of the main tower deformation amount during the construction process with the construction progress; a main tower construction parameter adjustment module for determining the main tower construction adjustment parameters. The main tower deformation amount determined by this system is more in line with the engineering requirements and avoids over-evaluation.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction monitoring and control, and particularly relates to a dynamic monitoring system for the construction alignment of an outward-expanded main tower of a suspension bridge. Background Art

[0002] The suspension bridge is one of the common bridge types. It is mainly a bridge with cables suspended and anchored on both banks by the main tower as the main load-bearing member of the superstructure. The construction stage of the superstructure is a critical period for the alignment control of the suspension bridge structure, and a large number of construction surveys and monitoring surveys are required.

[0003] The shapes of the main towers of suspension bridges are diverse, such as H-shaped, A-shaped, etc. In practical applications, the outward-expanded shape is also adopted for the main tower of the suspension bridge, that is, the upper crossbeam of the main tower is wider than the lower crossbeam. Due to the smaller floor area at the bottom of this type of main tower, it can meet the requirements of building bridges in some special terrains. Due to the special structure of the outward-expanded main tower, it is more likely to deform under the tension of the main cable. The main cable, the main load-bearing structure of the suspension bridge, is a flexible structure, and the main cable is supported by the main tower to provide tension. The top of the upper crossbeam of the outward-expanded main tower suspension bridge mainly bears the horizontal force transmitted by the main cable. Affected by the tension, the main tower is likely to deform unavoidably, and the deformation of the main tower will affect the distribution and balance of the main cable tension, thereby affecting the stability of the entire suspension bridge.

[0004] In the related art, displacement sensors or radar sensors are used to track the deformation of the main tower during construction. The basis for measuring the deformation is the initial shape of the bridge, and the measurement of the deformation does not combine the actual construction situation, resulting in an over-evaluation of the deformation of the suspension bridge, and increasing the construction difficulty or maintenance cost. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a dynamic monitoring system for the construction alignment of an outward-expanded main tower of a suspension bridge to meet the requirements of evaluating the deformation of the main tower according to the actual construction situation and reducing the construction difficulty and maintenance cost.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a dynamic monitoring system for the construction alignment of an extended main tower of a suspension bridge, including: data acquisition devices arranged at the target positions of the extended main tower of the suspension bridge to obtain the target data of the extended main tower during the construction process; a data processing module for analyzing the target data of the extended main tower to obtain the actual deformation amount of the extended main tower at the current construction stage; a simulation module for the extended main tower of the suspension bridge, which, according to the current construction steps, performs backward deduction on a preset completed-bridge model of the suspension bridge that meets safety standards to determine the simulated deformation amount of the extended main tower at the current construction stage. Before entering the current construction step, the preset completed-bridge model of the suspension bridge inputs the material data of the previous construction step and is updated according to the material data; a main tower status monitoring module for obtaining the actual deformation amount and the simulated deformation amount at each construction stage to determine the linear change of the main tower deformation amount with the construction progress during the construction process; and a main tower construction parameter adjustment module for determining the main tower construction adjustment parameters according to the linear change of the main tower deformation amount with the construction progress during the construction process.

[0008] Optionally, the data acquisition devices include: an unmanned aerial vehicle (UAV) image acquisition device for obtaining images of the upper crossbeam of the extended main tower of the suspension bridge above the extended main tower, and a main tower center display mark is preset on the upper crossbeam of the extended main tower; a high-precision total station measurement system for calculating the three-dimensional spatial position coordinates of the suspension bridge at the target angle after meteorological correction. The data processing module includes: an image processing module for correcting the non-linear distortion of the image of the upper crossbeam of the extended main tower of the suspension bridge and registering the corrected image according to the three-dimensional spatial position coordinates at the target angle of the suspension bridge to obtain the actual position coordinates of the center display mark on the upper crossbeam of the extended main tower of the suspension bridge.

[0009] Optionally, the main tower status monitoring module includes: a main tower center display mark offset determination module for determining the center display mark offset according to the position coordinates of the center display mark in the simulated deformation amount and the actual position coordinates of the center display mark on the upper crossbeam of the extended main tower of the suspension bridge; a main tower displacement determination module for determining the main tower displacement according to the three-dimensional spatial position coordinates of the suspension bridge calculated by the high-precision total station measurement system and the three-dimensional spatial position coordinates corresponding to the original design model of the suspension bridge; and a first main tower deformation amount determination module for determining the first main tower deformation parameter according to the center display mark offset and the main tower displacement.

[0010] Optionally, the suspension bridge includes multiple outward-expanded main towers. For any two adjacent outward-expanded main towers, it further includes: multiple ranging sensors, including a first ranging sensor, a second ranging sensor, a third ranging sensor, and a fourth ranging sensor. The first ranging sensor is disposed on one side of the top of the upper cross beam of the first outward-expanded main tower, the second ranging sensor is disposed on one side of the top of the upper cross beam of the second outward-expanded main tower, and the third ranging sensor and the fourth ranging sensor are respectively disposed on the opposite sides of the top of the lower cross beam of the first outward-expanded main tower and the second outward-expanded main tower; The first ranging sensor obtains the distance from one side of the top of the upper cross beam of the first outward-expanded main tower to the other side of the top of the upper cross beam of the first outward-expanded main tower as the first distance; The second ranging sensor obtains the distance from one side of the top of the upper cross beam of the second outward-expanded main tower to the other side of the top of the upper cross beam of the second outward-expanded main tower as the second distance; The third ranging sensor obtains the distances from one side of the top of the lower cross beam of the first outward-expanded main tower to both sides of the top of the upper cross beam of the second outward-expanded main tower as the third distance and the fourth distance; The fourth ranging sensor obtains the distances from the other side of the top of the lower cross beam of the second outward-expanded main tower to both sides of the top of the upper cross beam of the first outward-expanded main tower as the fifth distance and the sixth distance; A first fitting module for fitting a first triangle with the first distance, the fifth distance, and the sixth distance; A second fitting module for fitting a second triangle with the second distance, the third distance, and the fourth distance; A second main tower deformation parameter determination module for quantifying the difference between the first triangle and the second triangle to obtain the second main tower deformation parameter.

[0011] Optionally, a dynamic monitoring system for the construction alignment of the outward-expanded main tower of a suspension bridge further includes: a displacement influence simulation module for adjusting the parameters of the pre-established model of the outward-expanded main tower of the suspension bridge according to the main tower displacement, and constructing a first simulated triangle and a second simulated triangle in the adjusted model of the outward-expanded main tower of the suspension bridge; A displacement influence degree measurement module for quantifying the difference between the first simulated triangle and the second simulated triangle to obtain the displacement influence degree; A second main tower deformation parameter correction module for correcting the second main tower deformation parameter based on the displacement influence degree.

[0012] Optionally, a dynamic monitoring system for the construction alignment of the outward-expanded main tower of a suspension bridge, the data acquisition device includes: a construction scene acquisition device for acquiring construction scenes; The main tower state monitoring module includes: a fusion module for fusing the first main tower deformation parameter and the corrected second main tower deformation parameter to obtain a comprehensive deformation parameter; A construction progress determination module for determining the current construction progress according to the acquired construction scenes; A linear relationship display module for matching the comprehensive deformation parameter with the construction progress, constructing and displaying a linear change diagram of the main tower deformation amount during the construction process with respect to the construction progress.

[0013] Optionally, the main tower construction parameter adjustment module includes: a construction parameter determination module for receiving the key control factors selected by the user and the construction parameters corresponding to the key control factors; a construction parameter simulation module for adjusting the suspension bridge model according to the construction parameters and inputting the construction parameters of the next construction step. When the deformation amount of the main tower of the suspension bridge model is less than the preset threshold, the construction parameters determined by the construction parameter determination module are used as the main tower construction adjustment parameters.

[0014] This embodiment provides a dynamic monitoring system for the construction alignment of an externally expanded main tower of a suspension bridge. In the externally expanded main tower simulation module of the suspension bridge, the preset completed bridge model of the suspension bridge is updated through the material data of the previous construction step, and the preset completed bridge model that meets the safety standards is reversed. During the construction process, the completed bridge model of the suspension bridge in the initial state is continuously approximated to the actual construction process. That is to say, the basis for measuring the deformation amount of the main tower in each construction stage is the actual deformation amount and the completed bridge model updated based on the construction materials of the previous construction stage. The measurement of its deformation amount is more in line with the actual construction situation. In addition, in this system, only the influence of the actual construction material data on the deformation is considered, and this part belongs to the relatively unavoidable influence. By subtracting the actual deformation amount from the simulated deformation amount in the current construction stage, the deformation amount generated by the easily avoidable factors can be obtained. This part of the deformation amount is more valuable for reference. Compared with using the initial shape of the bridge as the deformation measurement factor, the deformation amount of the main tower determined by the present invention is more in line with the engineering requirements and avoids over-evaluation.

[0015] Other advantages, objectives, and features of the present invention will be described in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0017] Figure 1 It is a system schematic diagram of a dynamic monitoring system for the construction alignment of an externally expanded main tower of a suspension bridge in the present invention;

[0018] Figure 2 It is a structural schematic diagram of an externally expanded main tower of a suspension bridge in the present invention;

[0019] Figure 3 It is a system schematic diagram of a dynamic monitoring system for the construction alignment of an externally expanded main tower of a suspension bridge in the present invention;

[0020] Figure 4 It is a layout schematic diagram of multiple distance measuring sensors in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, 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 also be the communication inside two components. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] This embodiment proposes a dynamic monitoring system for the construction alignment of the external expansion main tower of a suspension bridge, as Figure 1 shown, including:

[0025] The data acquisition device 101 is arranged at the target position of the external expansion main tower of the suspension bridge and is used to obtain the target data of the external expansion main tower during the construction process;

[0026] The data processing module 102 is used to analyze the target data of the external expansion main tower to obtain the actual deformation amount of the external expansion main tower in the current construction stage;

[0027] The simulation module 103 of the external expansion main tower of the suspension bridge is used to reverse the preset completed bridge model of the suspension bridge that meets the safety standards according to the current construction steps to determine the simulated deformation amount of the external expansion main tower in the current construction stage. Before entering the current construction step, the material data of the previous construction step is input into the preset completed bridge model of the suspension bridge and updated according to the material data;

[0028] The main tower status monitoring module 104 is used to obtain the actual deformation amount and the simulated deformation amount in each construction stage, and determine the linear change of the main tower deformation amount with the construction progress during the construction process;

[0029] The main tower construction parameter adjustment module 105 is used to determine the main tower construction adjustment parameters according to the linear change of the main tower deformation amount with the construction progress during the construction process.

[0030] Exemplarily, for the system proposed in this embodiment, the specifically monitored external expansion main tower of the suspension bridge, asFigure 2 As shown, it is overall V-shaped, including an upper crossbeam and a lower crossbeam, and the upper crossbeam is wider than the lower crossbeam. In order to ensure the smooth turning of the main cable and decompose the tension in the main cable into vertical force and unbalanced horizontal force, and evenly transmit them to the brackets at the top of the tower or the anchor, the connection between the top of the upper crossbeam and the two arms of the main tower is a slope change point. Above the slope change point, a steel saddle cover is installed, that is, the slopes of the two arms are unified, and the slope at the installation position of the steel saddle cover slightly increases.

[0031] In this embodiment, the type of data acquisition device is set according to the type of main tower deformation quantity to be monitored. For example, when the main tower deformation quantity to be monitored is the main tower deformation quantity, the sensors installed at each target position of the main tower are radar sensors. The radar sensors periodically send radar signals and receive echo signals. The data acquisition device performs data acquisition every certain period of time (such as 10 ms).

[0032] After the data acquisition device 101 acquires the target data, in order to ensure the accuracy and availability of the data, it will be transmitted to the data processing module 102 through the communication module. The data processing module 102 can be a computer system. In the computer system, the acquired analog signals are first preprocessed, such as filtering and signal conditioning, and then digitized. Then, according to the data processing software, the acquired data is analyzed and processed to obtain the actual deformation quantity of the main tower. Specifically, the acquired target data can be radar echo signals.

[0033] In the simulation module 103 of the outrigger main tower of the suspension bridge, the initial state of the preset completed bridge model of the suspension bridge is established in the software according to the design drawings of the suspension bridge. The analysis software can be Midas Civil. It will be updated according to the material data of the previous construction stage in each construction stage, that is, during the construction process, the completed bridge model of the suspension bridge in the initial state is continuously approximated to the actual construction process. It should be noted that after each update of the preset completed bridge model of the suspension bridge with the material data, it is necessary to verify whether the updated completed bridge model meets the safety standards. When it meets the safety standards, then perform a backward deduction to obtain the simulated deformation quantity of the outrigger main tower at the current construction stage. When it does not meet the standards, adjust the geometric parameters of the suspension bridge until it meets the safety standards. The backward deduction process specifically includes dividing the reverse demolition analysis construction conditions of the model, starting from the completed bridge state, gradually tracing back to the current construction stage, and recording the deformation quantity of the main tower of the suspension bridge in the current construction state as the simulated deformation quantity. It should be noted that in this embodiment, the connection method between the main cable and the main tower of the completed bridge model always maintains the original designed position and angle. By inputting the material data of the construction steps into the completed bridge model, the influence of construction materials on the deformation of the main tower of the suspension bridge under ideal conditions can be effectively simulated, and the deformation caused by other factors such as the force of the main cable connection is screened out.

[0034] Specifically, before entering the current construction step, it is first necessary to collect and input the material usage data of the previous construction step. For example, the concrete usage of other parts of the bridge, the type and quantity of steel used in the main tower structure, and the physical properties of the construction materials, such as the strength and elastic modulus of the materials. Adjust the parameters in the model, such as the stiffness and strength of the materials, to reflect the actual construction conditions. According to the mechanical characteristics of the suspension bridge, establish a mathematical model, including the mechanical equations of the main cable, suspenders, and main tower, and solve the model through finite element analysis to obtain the simulated deformation of the main tower at the current construction stage.

[0035] The main tower status monitoring module 104 integrates the data obtained from the data acquisition device 101 and the deformation parameters provided by the simulation module 103 to analyze the deformation of the main tower. Specifically, the difference can be taken to obtain the deformation of the main tower at the current construction stage.

[0036] The main tower construction parameter adjustment module 105 adjusts the construction parameters, such as construction speed and material usage, according to the linear change data of the deformation to ensure that the deformation of the main tower is controlled within a safe range. As an implementable method, the method of determining the main tower construction adjustment parameters can be to use the root cause analysis method to determine the key factors causing the deformation, and adjust and simulate the key factors until a model meeting the safety standards is obtained, and then use the corresponding key factors meeting the safety standards as the construction adjustment parameters. This embodiment does not limit the method of determining the main tower construction adjustment parameters, and those skilled in the art can determine it according to needs.

[0037] This embodiment proposes a dynamic monitoring system for the construction alignment of the extended main tower of a suspension bridge. In the simulation module of the extended main tower of the suspension bridge, the preset completed bridge model of the suspension bridge is updated through the material usage data of the previous construction step, and the preset completed bridge model meeting the safety standards is reversed. During the construction process, the completed bridge model of the suspension bridge in the initial state is continuously approximated to the actual construction process. That is to say, the measurement basis of the deformation of the main tower at each construction stage is the actual deformation and the completed bridge model updated based on the construction materials of the previous construction stage. Its deformation measurement is more in line with the actual construction situation. In addition, only the influence of the actual construction material data on the deformation is considered in this system. This part belongs to the relatively unavoidable influence. By taking the difference between the actual deformation and the simulated deformation at the current construction stage, the deformation generated by the easily avoidable factors can be obtained. This part of the deformation is more valuable for reference. Compared with using the initial shape of the bridge as the deformation measurement factor, the deformation of the main tower determined by the present invention is more in line with the engineering requirements and avoids over-evaluation.

[0038] As an alternative implementation, a dynamic monitoring system for the construction alignment of the extended main tower of a suspension bridge, as Figure 3 shown, the data acquisition device 101 includes:

[0039] The unmanned aerial vehicle (UAV) image acquisition device 1011 is used to obtain an image of the upper crossbeam of the extended main tower of the suspension bridge above the extended main tower, and a main tower center display mark is preset on the upper crossbeam of the extended main tower.

[0040] The high-precision total station measurement system 1012 is used to calculate the three-dimensional spatial position coordinates of the suspension bridge at the target angle after meteorological correction.

[0041] The data processing module 102 includes:

[0042] The image processing module 1021 is used to correct the non-linear distortion of the image of the upper crossbeam of the extended main tower of the suspension bridge, and register the corrected image according to the three-dimensional spatial position coordinates of the suspension bridge at the target angle, so as to obtain the actual position coordinates of the center display mark on the upper crossbeam of the extended main tower of the suspension bridge.

[0043] Exemplarily, in this embodiment, a main tower center display mark is preset at the center position above the extended main tower of the suspension bridge. The display mark can be a special symbol or a special material for easy observation. The UAV image acquisition device 1011 is a UAV carrying an image acquisition device. The UAV image acquisition device 1011 flies above the extended main tower of the suspension bridge to obtain an image of the upper crossbeam of the extended main tower of the suspension bridge.

[0044] The high-precision total station measurement system 1012 may include a high-precision total station, a prism, and a temperature, humidity, and air pressure sensor. Meteorological data is obtained through the temperature, humidity, and air pressure sensors, and the data measured by the total station is corrected according to the meteorological data. The specific correction method may be to measure meteorological elements such as dry temperature, wet temperature, and air pressure at two places, namely the total station and the prism, and then take the average value of the two places and substitute it into the formula to calculate the meteorological correction, so as to realize the correction of the measurement data. In this embodiment, the target angle can be any angle at which any complete side of the extended main tower of the suspension bridge can be collected, and this embodiment does not limit this.

[0045] In the image processing module 1021, first, it is necessary to correct the non-linear distortion of the image of the upper crossbeam of the extended main tower of the suspension bridge. Specifically, it can be the geometric correction technology in image processing, or a convolutional neural network (CNN) can be used to directly learn the transformation parameters or non-linear mapping between images. Therefore, a registration network based on supervised learning, such as VoxelMorph, can be used to train through a large number of image pairs before and after registration to learn the non-linear transformation between images.

[0046] The corrected image needs to rely on point cloud registration technology to register according to the three-dimensional spatial position coordinates under the target angle of the suspension bridge, and align the three-dimensional point cloud data from different perspectives into a unified coordinate system. Specifically, feature-based registration methods such as FPFH (Fast Point Feature Histogram) and SHOT (Signature of Histogramsof OrienTations) can be used to extract feature points and their descriptors from the point cloud data, and then estimate the transformation between the two point clouds by matching these feature points. After completing the non-linear distortion correction of the image and the registration of the three-dimensional spatial position coordinates, the actual position coordinates of the central display mark on the upper crossbeam of the extended main tower of the suspension bridge can be obtained.

[0047] The main tower status monitoring module 104, such as Figure 3 shown, includes:

[0048] The central display mark offset determination module 1041 of the main tower is used to determine the central display mark offset according to the position coordinates of the central display mark in the simulated deformation amount and the actual position coordinates of the central display mark on the upper crossbeam of the extended main tower of the suspension bridge;

[0049] The main tower displacement determination module 1042 is used to determine the main tower displacement according to the three-dimensional spatial position coordinates of the suspension bridge calculated by the high-precision total station measurement system and the three-dimensional spatial position coordinates corresponding to the original design model of the suspension bridge;

[0050] The first main tower deformation parameter determination module 1043 is used to determine the first main tower deformation parameter according to the central display mark offset and the main tower displacement.

[0051] Exemplarily, when the simulated deformation amount of the extended main tower in the current construction stage in the extended main tower simulation module 103 of the suspension bridge is characterized by the position coordinates of the central display mark on the upper crossbeam of the extended main tower, the central display mark offset determined by the central display mark offset determination module 1041 of the main tower is the absolute value of the difference between the position coordinates of the central display mark in the simulated deformation amount and the actual position coordinates of the central display mark on the upper crossbeam of the extended main tower of the suspension bridge. It should be noted that the position coordinates of the central display mark in the simulated deformation amount are obtained by backtracking the preset suspension bridge completed bridge model updated by using the material data input in the previous construction step. The determination of its central display mark position coordinates only considers the influence of construction materials on the deformation of the main tower of the suspension bridge under ideal conditions. Then, the central display mark offset is the difference between the actual position coordinates of the central display mark and the simulated position coordinates of the central display mark after only considering the influence of construction materials on the deformation of the main tower of the suspension bridge. That is, the reason for the generation of this offset is the deformation of the main tower caused by other factors other than construction materials and the offset caused by the displacement of the main tower.

[0052] The main tower displacement determination module 1042 is used to determine the displacement of the main tower of the suspension bridge. It can be carried out based on the difference between the three-dimensional spatial position coordinates of the suspension bridge calculated by the high-precision total station measurement system and the three-dimensional spatial position coordinates corresponding to the original design model of the suspension bridge. Specifically, the high-precision total station measurement system is used to obtain the current actual three-dimensional spatial position coordinates of the suspension bridge, and the three-dimensional spatial position coordinates of the suspension bridge measured by the total station are compared with the three-dimensional spatial position coordinates in the original design model of the suspension bridge. Through comparative analysis, the difference between the actual position and the designed position of the main tower is calculated, which is the displacement of the main tower, including displacements in the horizontal and vertical directions.

[0053] The first main tower deformation amount determination module 1043 determines the deformation parameter of the first main tower according to the center display identification offset and the main tower displacement. The specific method can be the absolute value of the difference between the center display identification offset and the main tower displacement. This absolute value is used as the deformation parameter of the first main tower. This deformation parameter of the first main tower can indicate the deformation degree of the main tower. When the deformation degree exceeds the preset value, a prompt alarm can be issued.

[0054] This embodiment proposes a dynamic monitoring system for the construction alignment of the outrigger main tower of a suspension bridge. By determining the offset of the main tower center display identification based on the actual position coordinates of the main tower center display and the position coordinates of the center display identification in the simulated deformation amount, and after determining the offset, the offset is corrected by the main tower displacement determined by the main tower displacement determination module, so as to obtain a more accurate deformation parameter of the first main tower that can indicate the deformation degree of the main tower, improving the accuracy of the main tower deformation detection.

[0055] As an optional implementation manner, the suspension bridge includes multiple outrigger main towers. For any two adjacent outrigger main towers, it further includes:

[0056] Multiple ranging sensors, including a first ranging sensor, a second ranging sensor, a third ranging sensor, and a fourth ranging sensor. The first ranging sensor is disposed on one side of the top of the upper cross beam of the first outward-expanded main tower, the second ranging sensor is disposed on one side of the top of the upper cross beam of the second outward-expanded main tower, and the third ranging sensor and the fourth ranging sensor are respectively disposed on the opposite sides of the top of the lower cross beam of the first outward-expanded main tower and the second outward-expanded main tower; the first ranging sensor obtains the distance from one side of the top of the upper cross beam of the first outward-expanded main tower to the other side of the top of the upper cross beam of the first outward-expanded main tower as the first distance; the second ranging sensor obtains the distance from one side of the top of the upper cross beam of the second outward-expanded main tower to the other side of the top of the upper cross beam of the second outward-expanded main tower as the second distance; the third ranging sensor obtains the distances from one side of the top of the lower cross beam of the first outward-expanded main tower to both sides of the top of the upper cross beam of the second outward-expanded main tower as the third distance and the fourth distance; the fourth ranging sensor obtains the distances from the other side of the top of the lower cross beam of the second outward-expanded main tower to both sides of the top of the upper cross beam of the first outward-expanded main tower as the fifth distance and the sixth distance; a first fitting module is used to fit a first triangle with the first distance, the fifth distance, and the sixth distance; a second fitting module is used to fit a second triangle with the second distance, the third distance, and the fourth distance; a second main tower deformation amount determination module is used to quantify the difference between the first triangle and the second triangle to obtain a second main tower deformation parameter.

[0057] Exemplarily, when the suspension bridge is not a single-tower suspension bridge but a double-tower suspension bridge or a multi-tower suspension bridge, between two adjacent main towers, four sensors can be respectively arranged on the top of the upper cross beam and the top of the lower cross beam of the adjacent main towers. Figure 4 As shown, it is a schematic diagram of the first ranging sensor and the fourth ranging sensor obtaining the first distance, the fifth distance, and the sixth distance. The first fitting module fits a unique first triangle according to the first distance, the fifth distance, and the sixth distance. Similarly, according to the second ranging sensor and the third ranging sensor obtaining the second distance, the third distance, and the fourth distance, the second fitting module can fit a unique second triangle according to the second distance, the third distance, and the fourth distance. In the initial state, the similarity between the first triangle and the second triangle formed between the two main towers of the suspension bridge bridge should be 100%. When the main tower deforms, the similarity between the first triangle and the second triangle will gradually decrease. Therefore, the similarity between the first triangle and the second triangle, or the difference quantification result between the first triangle and the second triangle, can be used as an index to quantify the deformation or displacement of the suspension bridge. Taking the differential quantification result as the second main tower deformation parameter, by monitoring the second main tower deformation parameter, the linear change of the deformation amount with the construction progress can be shown. The difference quantification result between the first triangle and the second triangle can be to first use the angles or side lengths of the two triangles as elements to generate a side length set or an angle set, and calculate the Euclidean distance between the side length sets or angle sets of the two triangles as the difference quantification result.

[0058] This embodiment proposes a dynamic monitoring system for the construction alignment of the outrigger main tower of a suspension bridge. By utilizing the characteristics of the outrigger main tower, ranging sensors are arranged at different positions to form two shapes with a similarity of 100% under the standard state, and the differences between the two shapes are monitored, which can more intuitively and effectively display the changes in the deformation of the main tower with the construction progress. Moreover, the layout method of this method is simple and the computing resources are also small.

[0059] As an alternative implementation, the dynamic monitoring system for the construction alignment of the outrigger main tower of a suspension bridge further includes:

[0060] A displacement influence simulation module, which is used to adjust the parameters of the pre-established outrigger main tower model of the suspension bridge according to the displacement of the main tower, and construct a first simulated triangle and a second simulated triangle in the adjusted outrigger main tower model of the suspension bridge;

[0061] A displacement influence degree measurement module, which is used to quantify the differences between the first simulated triangle and the second simulated triangle to obtain the displacement influence degree;

[0062] A second main tower deformation parameter correction module, which is used to correct the second main tower deformation parameters based on the displacement influence degree.

[0063] Exemplarily, in the previous embodiment, the quantification result of the differences between the first triangle and the second triangle also includes the influence of the outrigger main tower displacement on the triangle differences. Therefore, in this embodiment, a displacement influence degree measurement module is used to determine the displacement influence degree, and the second main tower deformation parameters are corrected with reference to the displacement influence degree.

[0064] The displacement influence simulation module is responsible for adjusting the parameters of the pre-established outrigger main tower model of the suspension bridge according to the measured main tower displacement data or the main tower displacement determined by the main tower displacement determination module 1042. Through adjustment, the influence of the main tower displacement on the entire suspension bridge structure can be simulated. Using the actual displacement data of the main tower, relevant parameters in the suspension bridge model, such as the position, angle or other key structural parameters of the tower, are adjusted. After adjustment, a first simulated triangle and a second simulated triangle are constructed. The displacement influence degree measurement module is used to quantify the differences between the first simulated triangle and the second simulated triangle to evaluate the actual influence of the main tower displacement on the suspension bridge structure and obtain the displacement influence degree. The second main tower deformation parameter correction module adjusts the second main tower deformation parameters according to the displacement influence degree. Specifically, the second main tower deformation parameters can be subtracted by the displacement influence degree to obtain the main tower deformation parameters without the influence of the displacement.

[0065] This embodiment proposes a dynamic monitoring system for the construction alignment of the outrigger main tower of a suspension bridge, which corrects the deformation of the main tower indicated by the differences in shapes, eliminates the influence of the main tower displacement on the shapes, and improves the accuracy of deformation monitoring.

[0066] As an alternative embodiment, a data acquisition device includes:

[0067] A construction scene acquisition device for acquiring construction scenes;

[0068] The main tower status monitoring module includes:

[0069] A fusion module for fusing the deformation parameters of the first main tower and the corrected deformation parameters of the second main tower to obtain comprehensive deformation parameters;

[0070] A construction progress determination module for determining the current construction progress according to the acquired construction scenes;

[0071] A linear relationship display module for matching the comprehensive deformation parameters with the construction progress, constructing and displaying a linear change diagram of the deformation amount of the main tower during the construction process with respect to the construction progress.

[0072] Exemplarily, the construction scene acquisition device acquires real-time scenes of the construction site. The construction scene acquisition device can be a camera or a device such as a drone to acquire real-time scenes at the construction site. The acquired scenes are transmitted to the monitoring center for storage and analysis.

[0073] The fusion module fuses the deformation parameters of the first main tower and the corrected deformation parameters of the second main tower to obtain comprehensive deformation parameters. The data fusion method can be to use data fusion technologies (such as weighted average, Kalman filtering, etc.) to fuse the two sets of data to obtain comprehensive deformation parameters. The construction progress determination module determines the current construction progress according to the acquired construction scenes. Specifically, it analyzes the construction scenes and identifies the key indicators of the construction progress (such as the amount of materials used, the completed part of the construction, etc.). The linear relationship display module matches the comprehensive deformation parameters with the construction progress, constructs and displays a linear change diagram of the deformation amount of the main tower during the construction process with respect to the construction progress. Specifically, it uses data analysis tools (such as Excel, Python, etc.) to construct a relationship model between the deformation amount and the construction progress and draw a linear change diagram.

[0074] This embodiment proposes a dynamic monitoring system for the construction alignment of the outrigger main tower of a suspension bridge. By using the construction scene acquisition device to acquire scenes, it can independently judge the current construction progress, and fuse the deformation parameters of the first main tower and the corrected deformation parameters of the second main tower, increasing the reference dimension of the deformation parameters, improving the accuracy of deformation monitoring, and at the same time improving the intelligence of the system.

[0075] As an alternative embodiment, the main tower construction parameter adjustment module includes:

[0076] A construction parameter determination module for receiving the key control factors selected by the user and the construction parameters corresponding to the key control factors;

[0077] The construction parameter simulation module is used to adjust the suspension bridge model according to the construction parameters and input the construction parameters of the next construction step. When the tower deformation of the suspension bridge model is less than the preset threshold, the construction parameters determined by the construction parameter determination module are used as the tower construction adjustment parameters.

[0078] Exemplarily, the construction parameter determination module can be a touch display screen or a computer connected to an input device. In the touch display screen, a key control factor selection module can be displayed in the primary window for receiving the user's key factor selection. This key factor selection can be a factor that can correct the bridge construction parameters obtained by the user analyzing the linear change diagram of the tower deformation with the construction progress. After selecting the key control factor, the display screen will jump to the secondary window for adjusting the parameters of the key control factor, that is, the construction parameters.

[0079] The construction parameter simulation module determines whether the received construction parameters meet the deformation safety requirements. The specific method can be to adjust the suspension bridge model according to the construction parameters and input the construction parameters of the next construction step. When the tower deformation of the suspension bridge model is less than the preset threshold, the construction parameters determined by the construction parameter determination module are used as the tower construction adjustment parameters. The preset threshold can be set according to different design requirements and is not limited in this embodiment.

[0080] This embodiment provides a dynamic monitoring system for the construction alignment of the extended tower of a suspension bridge, which is provided with a construction parameter determination module that can adjust the construction parameters according to the user's needs. And this system is provided with a construction parameter simulation module that can simulate the construction parameters input by the user to verify their rationality, providing an effective verification window for the user and facilitating the user to efficiently solve the deformation problem.

[0081] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A dynamic monitoring system for the construction line of the main tower of a suspension bridge, characterized in that: include: Data acquisition equipment is deployed at the target location of the external expansion main tower of the suspension bridge to obtain target data of the external expansion main tower during the construction process; A data processing module is used to analyze the target data of the external expansion main tower and obtain the actual deformation of the external expansion main tower at the current construction stage; The suspension bridge outward expansion main tower simulation module is used to reverse the preset suspension bridge model that meets the safety standards according to the current construction step, determine the simulated deformation of the outward expansion main tower at the current construction stage, and input the material data of the previous construction step before entering the current construction step of the preset suspension bridge model, and update it according to the material data; The main tower status monitoring module is used to obtain the actual deformation and simulated deformation at each construction stage, and determine the linear change of the main tower deformation during the construction process with the construction progress; The main tower construction parameter adjustment module is used to determine the main tower construction adjustment parameters according to the linear change of the main tower shape variable with the construction progress during the construction process.

2. A suspension bridge outward expansion main tower construction line dynamic monitoring system according to claim 1, characterized in that: Data collection equipment, including: The drone image acquisition device is used to obtain the image of the upper crossbeam of the outer expansion main tower of the suspension bridge above the outer expansion main tower. The upper crossbeam of the outer expansion main tower is preset with the main tower center display mark; High-precision total station measurement system, used to calculate the three-dimensional spatial position coordinates of the suspension bridge at the target angle after meteorological correction; Data processing module, including: The image processing module is used to correct the nonlinear distortion of the image of the cross beam on the outward expansion main tower of the suspension bridge, and to align the corrected image according to the three-dimensional spatial position coordinates at the target angle of the suspension bridge to obtain the actual position coordinates of the center display mark on the cross beam on the outward expansion main tower of the suspension bridge.

3. A suspension bridge outward expansion main tower construction line dynamic monitoring system according to claim 2, characterized in that: Main tower condition monitoring module, including: The main tower center display mark offset determination module is used to determine the center display mark offset according to the center display mark position coordinates in the simulated deformation amount and the actual position coordinates of the center display mark on the upper crossbeam of the main tower of the suspension bridge; The main tower displacement determination module is used to determine the main tower displacement according to the three-dimensional spatial position coordinates of the suspension bridge calculated by the high-precision total station measurement system and the three-dimensional spatial position coordinates corresponding to the original design model of the suspension bridge; The first main tower deformation amount determination module is used to determine the first main tower deformation parameters according to the center display mark offset and the main tower displacement.

4. A suspension bridge outward expansion main tower construction line dynamic monitoring system according to claim 3, characterized in that: The suspension bridge includes a plurality of outward-expanded main towers, and for any two adjacent outward-expanded main towers, further includes: A plurality of ranging sensors, including a first ranging sensor, a second ranging sensor, a third ranging sensor, and a fourth ranging sensor, wherein the first ranging sensor is arranged on one side of the upper crossbeam top of the first outward-expanded main tower, the second ranging sensor is arranged on one side of the upper crossbeam top of the second outward-expanded main tower, and the third ranging sensor and the fourth ranging sensor are arranged on opposite sides of the lower crossbeam tops of the first outward-expanded main tower and the second outward-expanded main tower respectively; The first distance measuring sensor acquires the distance from one side of the top of the upper crossbeam of the first outward-expanded main tower to the other side of the top of the upper crossbeam of the first outward-expanded main tower as the first distance; The second distance measuring sensor obtains the distance from one side of the top of the upper crossbeam of the second outward-expanded main tower to the other side of the top of the upper crossbeam of the second outward-expanded main tower as the second distance; The third distance measuring sensor obtains the distance from one side of the top of the lower beam of the first outward-expanded main tower to both sides of the top of the upper beam of the second outward-expanded main tower as the third distance and the fourth distance; The fourth distance measuring sensor obtains the distance from the other side of the top of the lower crossbeam of the second outward-expanded main tower to the two sides of the top of the upper crossbeam of the first outward-expanded main tower as the fifth distance and the sixth distance; A first fitting module, used for fitting a first triangle with a first distance, a fifth distance and a sixth distance; A second fitting module, used for fitting a second triangle with a second distance, a third distance and a fourth distance; The second main tower deformation amount determination module is used to quantify the difference between the first triangle and the second triangle to obtain the deformation parameters of the second main tower.

5. A suspension bridge outward expansion main tower construction line dynamic monitoring system according to claim 4, characterized in that: Also includes: A displacement impact simulation module is used to adjust the parameters of a pre-established suspension bridge outward expansion main tower model according to the main tower displacement, and to construct a first simulation triangle and a second simulation triangle in the adjusted suspension bridge outward expansion main tower model; A displacement influence degree measurement module is used to quantify the difference between the first simulated triangle and the second simulated triangle to obtain a displacement influence degree; The second main tower deformation parameter correction module is used to correct the second main tower deformation parameter based on the displacement influence.

6. A suspension bridge outward expansion main tower construction line dynamic monitoring system according to claim 5, characterized in that: Data acquisition equipment includes: Construction picture acquisition equipment, used to acquire construction pictures; Main tower condition monitoring module, including: A fusion module is used to fuse the deformation parameters of the first main tower and the corrected deformation parameters of the second main tower to obtain comprehensive deformation parameters; The construction progress determination module is used to determine the current construction progress based on the collected construction pictures; The linear relationship display module is used to match the comprehensive deformation parameters with the construction progress, and to construct and display the linear change diagram of the main tower deformation during the construction process as the construction progresses.

7. A suspension bridge outward expansion main tower construction line dynamic monitoring system according to any one of claims 1-6, characterized in that: The main tower construction parameter adjustment module includes: A construction parameter determination module, used to receive key control factors selected by a user and construction parameters corresponding to the key control factors; The construction parameter simulation module is used to adjust the suspension bridge model according to the construction parameters corresponding to the key control factors and input the construction parameters of the next construction step. When the shape variable of the main tower of the suspension bridge model is less than the preset threshold, the construction parameters determined by the construction parameter determination module are used as the main tower construction adjustment parameters.

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