CN-121990462-A - Suspension bridge steel box girder hoisting method and system

Abstract

The invention provides a suspension bridge steel box girder hoisting method and a system, which realize synchronous acquisition of multi-hoisting point elevation data and internal force data by arranging a monitoring module and form full-flow intelligent control by combining filtering fusion, grading decision and automatic deviation correction steps. The method can comprehensively capture the space pose change and the stress state of the steel box girder in the hoisting process, improves the hoisting precision and safety, can dynamically maintain the balance of hoisting points and reduce the risk caused by manual intervention hysteresis by collecting and processing data in real time, can provide a reliable reference for data comparison by introducing a preset reference value, ensures the judgment accuracy, can realize closed-loop management by an automatic alarm and adjustment mechanism, ensures the continuous stability of the hoisting process, and solves the technical problems of low safety and poor positioning precision caused by difficult synchronization and coordination of multiple hoisting points in the hoisting process in the prior art, and difficult satisfaction of the high-standard construction requirement of the large-tonnage steel box girder.

Inventors

• GUAN JIAN
• WANG KUN
• AI GUOQING
• WU BENCHAO
• LIU YAN
• Lu Hangchi
• YANG ENYI
• ZHOU JIN
• LI HONGTAO
• RUAN JING
• ZHU ZHIYUAN
• LIU HONGYU
• LI HAORAN
• GUO LIFEI
• LI CHAOCHENG

Assignees

• 中交二公局华东建设有限公司
• 江苏省交通工程建设局

Dates

Publication Date

20260508

Application Date

20260211

Claims (10)

1. 1. The suspension bridge steel box girder hoisting method is characterized by comprising the following steps of: S1, arranging monitoring modules at a plurality of hanging points of a steel box girder to be hoisted, and acquiring elevation data and internal force data of each hanging point in real time; s2, filtering and fusing the collected elevation data and internal force data of each lifting point to generate fused data; S3, calculating synchronous deviation and flatness indexes of each lifting point according to the fusion data, and generating a regulation and control instruction based on a hierarchical decision logic; S4, issuing a regulating instruction to an execution module, and controlling the hydraulic jacks corresponding to the lifting points to perform cooperative action so as to realize dynamic balance of lifting point elevation and internal force; and S5, triggering an alarm and automatically adjusting when the deviation exceeds a safety threshold value until the hoisting state is restored to be stable.
2. 2. The method for hoisting the steel box girder of the suspension bridge according to claim 1, wherein in the step S2, the filtering process eliminates the environmental interference by adopting a combination algorithm, the data fusion integrates the elevation and internal force information by a weighting strategy, and the weight is dynamically allocated based on the signal quality.
3. 3. The suspension bridge steel box girder hoisting method according to claim 2, wherein the filtering process comprises: Adopting a Kalman filtering and wavelet threshold noise reduction combination algorithm to the elevation data, and reducing vibration interference through a prediction model and residual error adjustment; and (3) adopting a sliding window average and amplitude limiting filtering combination algorithm to the internal force data, smoothing the instantaneous fluctuation and eliminating the abnormal value.
4. 4. A suspension bridge steel box girder hoisting method according to claim 3, wherein the data fusion is realized by dynamic weighting, the weighting coefficient is adaptively adjusted according to the quality of the positioning signal, the quality of the positioning signal is preferentially high-level data, otherwise, the high-level and internal force data are adopted in an equalizing way.
5. 5. The method for hoisting the steel box girder of the suspension bridge according to claim 1, wherein in the step S3, the hierarchical decision logic includes the following priorities: when the internal force of any lifting point exceeds the design safety limit value, immediately generating an emergency stop instruction and triggering a steel wire rope locking mechanism; A second-level decision is that based on the deviation between the average value of the internal force of each lifting point and the actually measured internal force, the elevation adjustment quantity is calculated through a linear correlation model, and an internal force compensation instruction is generated; three-level decision, namely generating an elevation synchronous instruction based on the deviation of elevation data of each lifting point and the average elevation, and realizing plane calibration by finely adjusting the displacement of the hydraulic jack; and a fourth-level decision, namely, when the internal force and the elevation deviation exceed the threshold value, cooperatively executing a second-level decision and a third-level decision to ensure the stability of the adjustment process.
6. 6. The method for hoisting a steel box girder of a suspension bridge according to claim 5, wherein the linear correlation model is calibrated by a pre-test, the model is of the form F i =k×Z i +b, i=1, 2..n, wherein F i is internal force data at the ith hoisting point, Z i is elevation data at the ith hoisting point, k is an internal force-elevation coefficient, b is a constant, and n is the number of hoisting points.
7. 7. The method for hoisting the steel box girder of the suspension bridge according to claim 1, wherein in the step S4, the execution module adopts a master-slave control mechanism, sets the hydraulic jack group as a master jack and a slave jack, synchronizes the slave jacks with the master jack action as a reference, and corrects the influence of the hydraulic oil temperature on the adjustment precision in real time in combination with a temperature compensation algorithm.
8. 8. A suspension bridge steel box girder hoisting system for realizing the suspension bridge steel box girder hoisting method of claims 1 to 7, characterized by comprising: the monitoring module is arranged at each lifting point of the steel box girder to be lifted and is used for collecting elevation data and internal force data in real time; the data processing module is used for filtering, fusing and calculating deviation of the acquired data; the decision module is used for generating a regulation and control instruction based on the hierarchical logic; The execution module comprises a hydraulic jack group and is used for executing cooperative adjustment according to the instruction; and the alarm module is used for outputting an early warning signal in an abnormal state.
9. 9. The suspension bridge steel box girder hoisting system of claim 8, wherein the monitoring module comprises a positioning unit and a force sensing unit, both of which are in communication connection with the data processing module; The positioning unit adopts a satellite positioning device to realize high Cheng Jiance, the force sensing unit adopts a tension sensor to realize internal force monitoring, and all units are packaged in the protective shell to resist environmental interference.
10. 10. The suspension bridge steel box girder hoisting system according to claim 8, wherein the execution module comprises a hydraulic driving unit and a feedback checking unit, the feedback checking unit acquires elevation and internal force data through high frequency, checks execution deviation of an adjustment instruction in real time, and dynamically corrects opening of a hydraulic flow valve to ensure adjustment accuracy.

Description

Suspension bridge steel box girder hoisting method and system Technical Field The invention belongs to the technical field of construction of suspension bridges, and particularly relates to a suspension bridge steel box girder hoisting method and system. Background The suspension bridge uses the main cable as a main bearing member, and transfers the bridge deck system load to the main cable and the large-span bridge structure of the bridge tower through the sling, has the characteristics of large spanning capacity, light structure, graceful modeling and the like, and is widely applied to important projects such as spanning rivers, straits and the like. The steel box girder is used as a bridge deck system structure form of a suspension bridge, adopts all-welded steel plates to form a closed box section, has the advantages of light dead weight, high torsional rigidity, good aerodynamic performance and the like, and is a core member for guaranteeing the overall stability and driving comfort of the bridge. In the construction process of the suspension bridge, the hoisting of the steel box girder refers to the operation process of prefabricating and transporting the factory to the steel box girder segment of the bridge position in sections, lifting the steel box girder segment to the designed elevation through special hoisting equipment and connecting the steel box girder segment with a sling, and finally splicing the steel box girder segment section by section to form the whole bridge deck. At present, the hoisting of the steel box girder of the large-span suspension bridge is mainly implemented by adopting a cable-carrying crane, wherein a synchronous hoisting process of a double-span cable crane with multiple hoisting points is a common method for the installation of long-section and large-tonnage steel box girders. However, the existing multi-lifting-point lifting method of the double-span cable crane still faces outstanding challenges in practical application, the synchronous control requirement of the multi-lifting-point lifting process is extremely high, under the influence of dynamic environments such as wind load and temperature change, small differences of lifting speed and force of each lifting point can possibly cause the addition of internal stress or attitude deviation of a beam Duan Chansheng, the existing monitoring means are difficult to accurately capture the space attitude change of the lifting point, the regulation precision is insufficient, the safety is poor, meanwhile, the jack regulation cooperativity is poor in the lifting process, the deviation rectifying process depends on manual instruction intervention, an automatic mechanism is lacked, the efficiency is low, and human errors are easy to introduce. Therefore, in the existing steel box girder hoisting process, the technical problems that multiple hoisting points are difficult to synchronize and coordinate in the hoisting process, the safety is low, the positioning accuracy is poor, and the high-standard construction requirements of the large-tonnage steel box girder are difficult to meet still exist. Disclosure of Invention In order to solve the technical problems that in the prior art, in the using process of the existing steel box girder hoisting method, a plurality of hoisting points are difficult to synchronize and coordinate in the hoisting process, so that the safety is low, the positioning accuracy is poor, and the high-standard construction requirements of a large-tonnage steel box girder are difficult to meet, the invention provides a suspension bridge steel box girder hoisting method and a suspension bridge steel box girder hoisting system. In order to achieve the above purpose, the present invention adopts the following technical scheme: in a first aspect, the invention provides a suspension bridge steel box girder hoisting method, which comprises the following steps: S1, arranging monitoring modules at a plurality of hanging points of a steel box girder to be hoisted, and acquiring elevation data and internal force data of each hanging point in real time; s2, filtering and fusing the collected elevation data and internal force data of each lifting point to generate fused data; S3, calculating synchronous deviation and flatness indexes of each lifting point according to the fusion data, and generating a regulation and control instruction based on a hierarchical decision logic; S4, issuing a regulating instruction to an execution module, and controlling the hydraulic jacks corresponding to the lifting points to perform cooperative action so as to realize dynamic balance of lifting point elevation and internal force; and S5, triggering an alarm and automatically adjusting when the deviation exceeds a safety threshold value until the hoisting state is restored to be stable. Optionally, in step S2, the filtering process eliminates the environmental interference by using a combination algorithm, the data fusion integrates the el