Abstract:As one of the widely used structures in modern civil engineering, the cable system, as the main load-bearing component, is crucial to the safety and service life of the overall structure. Magnetostrictive guided wave non-destructive testing technology has the advantages of large detection length and wide coverage of structural areas in cable damage and corrosion detection, and has gradually become a widely used new non-destructive testing method for cables. Magnetostrictive guided wave non-destructive testing technology is relatively stable in qualitative problems of damage and corrosion. The quantitative relationship between defect size and defect echo is related to many factors. This paper conducts experimental research on the notch detection signal of the basic unit high-strength steel wire of the cable, and obtains the relationship between the defect echo reflection coefficient and the steel wire defect cross-sectional loss rate. It is found that it is very similar to a parabola. This research provides a basis for the quantitative evaluation of damage and corrosion of steel wires and steel wire cables by magnetostrictive guided wave non-destructive testing.

Abstract:The hydraulic synchronous lifting system has been well applied in the salvage of sunken ships, breaking through the traditional salvage methods. In view of the instability of the salvage process caused by the up and down movement of the barge affected by waves, the working principle of passive wave compensation is analyzed. Through system dynamics analysis, a passive wave compensation system is designed and simulated using MATLAB/Simulink to study the working characteristics of the wave compensation system. The simulation results show that the designed wave compensation system can effectively reduce the impact of waves on the salvage process of sunken ships.

Abstract:Some cable-stayed bridges are composed of a spatial rod system structure that is interconnected by multiple cables, towers, beams, and piers. This paper studies the spatial rod system structure of a cable-stayed bridge and uses ANSYS software to construct a spatial rod system structure model of the bridge. According to the most unfavorable transverse load condition of the bridge, a static load analysis of the spatial rod structure of the bridge is carried out to further verify the stability of the spatial rod system structure of the cable-stayed bridge.

Abstract:The anchoring performance of prestressed anchor cable steel strand and corrugated pipe assembly is an important parameter affecting the reliability of anchor cable. This paper compares the bonding performance of multiple epoxy-coated steel strand corrugated pipe assemblies and multiple smooth steel strand corrugated pipe assemblies through experimental research. The results show that the average bond strength between single-filament epoxy-coated steel strand and cement mortar is basically the same as that of smooth steel strand. When the average bond strength of anchor cable corrugated pipe assembly is less than 6.2 MPa, the anchor cable will not be pulled out and destroyed.

Abstract:During the design of the suspension cables of the Third Bridge over the Bosphorus Strait in Turkey, the large deflection angle of the suspension cables at the limit position during the operation of the bridge was fully considered. It was required to design a flexible waterproof cover to seal the connection between the suspension cable and the cable guide pipe to protect the suspension cable anchor from rainwater corrosion. This paper designs the material selection and structure of the flexible waterproof cover, and verifies the mechanical performance and sealing effect of the flexible waterproof cover through theoretical calculation and ANSYS analysis.

Abstract:The sliding cable saddle is a key technology of the new steel wire cable-stayed system in the reconstruction project of Dongming Yellow River Bridge. When the cable force at both ends of the steel wire cable-stayed cable is uneven, the sliding cable saddle can adjust the cable force at both ends by sliding, making the cable force at both ends gradually tend to balance. This paper introduces the structure and function of the sliding cable saddle, and analyzes the stress of the sliding cable saddle through theoretical calculation and ANSYS finite element analysis software, proving that the structure of the sliding cable saddle is safe and reliable, and can meet the requirements of bridge life design.

Abstract:The anchor cable grouting stopper used in the foundation pit (slope) support project of the core business street in Wuxiang New District, Nanning, has the characteristics of large grouting hole diameter and high grouting pressure, which makes it difficult to connect the stopper with the anchor cable body. The existing anchor cable grouting stopper structure is difficult to meet the requirements of this project. In order to ensure the smooth implementation of the project, a grouting stopper was designed according to the characteristics of this project. Its performance was verified through experiments, which can solve the technical problems of this project and can be widely used in engineering.

Abstract:This paper introduces a multi-unit pump synchronous control technology. By analyzing the construction characteristics of the template system, the application of multi-unit pump synchronous control technology in the template system is proposed. And through the actual application of engineering, the synchronous accuracy of the template system is verified.

Abstract:Scattered cable saddles are divided into swing axis type, rolling axis and sliding type according to different moving friction pairs. Combined with the installation process of the swing axis type scattered cable saddle of Liangqing Bridge, this paper discusses the construction difficulties such as heavy weight, large volume, and precise structure, and provides solutions. At the same time, through the research on the swing test of the swing axis type scattered cable saddle, a method for measuring the swing angle of the scattered cable saddle is provided. Provide reference for similar projects.