The Research On Application Of PIV Technology In Structural Test Of Port And Waterway Engineering

Ports,waterways and water conservancy projects will produce many interaction issues between hydraulic structures and soil,Physical model testing is one of the effective ways to study such problems.The model test can simulate the deformation and stress characteristics of soil and structure,and provide reasonable reference for engineering design and construction measures.The current physical model test in the deformation measurement mainly use dial indicator,displacement meter and other equipment.These model tests measure the displacement of the structure and the soil surface,but rarely studies the important factors that affect the force of the structure-the deformation process around the soil.Particle Image Velocimetry(PIV)is a fluid measurement method that uses multiple times to record the position of the particles in the flow field and analyze the captured images to measure the displacement of the flow field.The method has the advantages of high precision and no interference in the deformation displacement measurement,and can effectively observe the deformation displacement process of the soil.In recent years,PIV technology has been widely applied to a number of disciplines,but in the port structure of the application is still not much.In order to study the application effect of PIV technology in port and waterway engineering model test,this paper uses the methods of conventional physical model test and geotechnical centrifuge model test,which includes the following aspects:(1)This paper summarizes the research status of port engineering model test and PIV technology in geotechnical experiment by reviewing the domestic and foreign literatures.(2)Based on the study of the deformation and deformation of finite soils between two adjacent structures,this paper analyzes the variation law of the crack surface and displacement field of the soil after the wall,and discusses the application of PIV technology in the conventional physical model test.(3)Based on the study of the influence of foundation pit excavation of adjacent shiplock on supporting structure and surrounding soil,this paper uses the PIV technique to measure the deformation displacement of the soil after the retaining wall of the foundation pit,and then analyze the relationship between soil displacement displacement vector field and structural displacement and soil pressure distribution,and discuss the application of PIV technique in centrifugal physical model test.