Construction Risk Of Three Gorges Reservoir Area High-piled Wharf Rock-socketed Analysis And Evaluation

After the impoundment of the Three Gorges Dam,it has been formed the Three Gorges Reservoir area.With the natural hydrological conditions changes to to hydrological conditions in the reservoir area.The Open-type wharf on piles shows wide application prospect in upstream Yangtze River with great water fluctuation.So the wharf piles will face severe challenges.Meanwhile The theory and construction technology of piles foundation will face new challenges.How to reduce the risk of pile foundation construction is a pressing matter of the moment.This paper studies the risk assessment of rock socketed pile in high pile wharf of the Three Gorges Reservoir area,based on Chongqing construction technology plan project.The main contents are as follows:1.Collecting construction data of the piled wharf in built or under construction.Statistical analysis of the proportion of various types of piles.It summarizes some possible accidents and potential risk factors in the construction of pile foundation by statistical analysis of the proportion of various types of piles.Fuzzy Analytic Hierarchy Process of the construction risk factors high pile wharf to identify,for each of the risk factors in order of importance and weight calculation.2.As for the vertical bearing capacity of structural failure in rock socketed cast-in-place pile,solves structural failure probability on the basis of structural reliability theory,BP neural network and other comprehensive analysis.In other words,Through the indoor model test,the existing specifications and the finite element simulation provide the sample data and establishing limit state equation of vertical bearing capacity structure to solve the structural failure probability.3.Research on risk comprehensive evaluation and structural risk quantitative evaluation.According to the existing risk assessment methods and decision-making principles,the risk evaluation theory system based on fuzzy comprehensive analytic hierarchy process(AHP),expert survey and risk matrix evaluation method is established.4.Research and control of risk assessment.By establishing construction risk response strategy to ensure construction safety,it is more important to realize the scientific decision of the construction plan and risk response strategy.5.Based on MATLAB platform construction of port engineering project Risk Evaluation System,a combination of methods and principles for risk identification,estimation,evaluation and control of rock socketed cast-in-place pile in high pile wharf,greatly improve the efficiency of analytical results.6.Based on method and the system of the risk analysis and evaluation,combination the engineering application of the first port of Fuling,the practicability and feasibility of the research results are verified.