Study On Safety Analysis And Risk Removal And Reinforcement Method Of Embankment Engineering In Suzhou Section Of Beijing-Hangzhou Canal

The embankments in Suzhou section of the Beijing-Hangzhou Canal not only provide flood control security for the economy,politics and culture of Suzhou,but also bring tremendous economic benefits into play in navigation,water supply and irrigation.Once the accident happens,it will cause great harm to the lives and property of the residents along the line.Therefore,it is necessary to study the safety situation and reinforcement methods of embankment engineering in Suzhou section of Beijing-Hangzhou Canal.This paper takes the embankment engineering of Suzhou section of Beijing-Hangzhou Canal as the research object,uses Autobank software to analyze the seepage and stability safety status of embankment engineering,uses improved catastrophe evaluation method,analytic hierarchy process and attribute hierarchy model method to evaluate the safety of unit embankment section,and develops the corresponding safety evaluation system of embankment engineering;on the basis of safety analysis,studies the reinforcement measures of embankment and the safety evaluation system of embankment engineering.Grey relational decision-making method for optimizing reinforcement effect and embankment reinforcement scheme.The main research contents are as follows:(1)Unsaturated steady seepage theory is used for steady seepage calculation,and unsteady seepage theory is used for seepage calculation during water level falling period.The results show that both horizontal and vertical seepage gradients increase with the increase of head difference,but both are smaller than permissible seepage gradients,and no seepage deformation occurs in unsteady seepage.The seepage gradient is also smaller than the permissible seepage gradient,and there will be no seepage damage.Simplified Bishop method is used to calculate the anti-sliding stability.The safety factors under different working conditions are compared and analyzed.It is found that the anti-sliding safety factors on the side of the embankment are lower than the standard requirements when the average annual lowest water level and water level fall.The safety status of the embankment project does not meet the requirements and needs to be strengthened.(2)The improved catastrophe assessment method,analytic hierarchy process(AHP)and attribute hierarchy model(AHP)for evaluating the safety of the embankment section of the unit are studied and applied to the comprehensive safety assessment of the typical embankment section of the Beijing-Hangzhou Canal.It is found that the calculated values of the three methods are different,but the evaluation grades are identical,and they are unsafe.In order to facilitate calculation,according to the theory of the above three methods,a safety evaluation system of embankment is developed by using MATLAB software.Through this system,the safety evaluation of unit embankment section can be realized more conveniently and quickly.(3)To study the reinforcement measures for slope instability of dyke engineering.The reinforcement effects of sheet pile,single row anti-slide pile,double row anti-slide pile and anchor rod on typical sections of embankment in Gusu area of Suzhou section of Beijing-Hangzhou Canal are analyzed and compared.Taking safety factor of anti-sliding stability,vertical seepage gradient,horizontal seepage gradient,engineering cost and construction difficulty as evaluation indexes,the weight of index is determined by entropy method,and the reinforcement schemes of two typical sections are optimized by grey relational decision-making method.It is concluded that the optimal reinforcement schemes of two typical sections are double-row anti-sliding piles.The safety analysis and reinforcement methods of embankment engineering in Suzhou section of Beijing-Hangzhou Canal are studied in this paper.Seepage calculation and stability checking can be used to judge the safety status of embankment engineering.The improved catastrophe evaluation method,analytic hierarchy process and attribute hierarchy model method can evaluate the safety of unit embankment section.The developed safety evaluation system of embankment engineering provides convenience for the safety evaluation of embankment engineering.Grey relational decision-making method can optimize the relative optimal embankment reinforcement measures.The above research can provide reference for seepage and stability analysis of embankment engineering,safety evaluation of unit embankment section,optimization of risk removal and reinforcement measures,and has certain engineering application value.