Research On Inspection And Evaluation System Of Bridge Underwater Structure

As an important part of the bridge structure system,the normal use of underwater structures is of great significance to the overall safety of the bridge structure.The environment of the underwater structure is complex and changeable,so there are countless examples of bridge destruction caused by the displacement of the underwater structure,the decrease of the bearing capacity or the damage.The research on bridge underwater structure in our country has been carried out relatively late,and its detection and evaluation work is even scarce,and it is difficult to be used in engineering practice.Therefore,it is very necessary to propose a detection and evaluation system for underwater structures to ensure the safety of bridge structures.This paper carries out related research on the inspection and evaluation of bridge underwater structures.The main research contents and conclusions are as follows:1.Summarized common bridge underwater structural diseases,divided underwater structural diseases into underwater concrete apparent disease,underwater steel material apparent disease,foundation erosion disease,foundation deformation disease,and analyzed various types from the aspects of construction and environment.The cause of the disease.Several methods of bridge underwater structure inspection are introduced in detail,and the advantages,disadvantages and applicability of each method are analyzed.2.The finite element software ANSYS Workbench was used to carry out a quantitative study on the scale of bridge underwater structures.Establish a finite element model of the bridge underwater structure,select several typical diseases of the bridge underwater structure,and determine the impact of the typical diseases on the bearing capacity of the bridge piers,pile foundations,and enlarged foundations under different quantitative parameters.Combining the results of finite element analysis and related evaluation specifications,a disease scale evaluation standard based on the remaining bearing capacity is established to provide a reference for the improvement and supplement of the existing specifications.3.On the basis of disease detection and standardization research,the technical condition assessment research of bridge underwater structure is carried out.Introduce several existing bridge technical condition assessment methods,and focus on the principle of the analytic hierarchy process;use the analytic hierarchy process to establish a bridge underwater structure evaluation model to determine the weight of each evaluation index;combine the bridge underwater structural components and components The evaluation model of the technical condition of the bridge is used to complete the assessment of the technical condition of the underwater structure of the bridge.4.Relying on the Lingkun Bridge’s underwater structure inspection and evaluation project,according to the inspection results,the evaluation method proposed in this paper was used to complete the Lingkun Bridge’s underwater structure technical status evaluation,and the technical status of the Lingkun Bridge’s underwater structure was determined.Verified the correctness and feasibility of the evaluation method proposed in this article,and provided reference for related projects.