首页|Deformation and stability of the seawall,considering the strength uncertainty of cement mixing piles
Deformation and stability of the seawall,considering the strength uncertainty of cement mixing piles
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The cement mixing(CM)pile is a common method of improving soft offshore ground.The strength growth of CM piles under complex conditions is affected by many factors,especially the cement and moisture contents,and shows significant uncertainty.To investigate the stochasticity of the early strength of CM piles and its impact on the displacement and stability of a seawall,a series of laboratory tests and numerical analyses were carried out in this study.Vane shear tests were conducted on the cement-solidified soil to determine the relationships between the undrained shear strength su of the cement soil curing in the seawater and the cement content ac,as well as the in situ soil moisture content w.It can be inferred that the 24 h undrained shear strength follows a normal distribution.A numerical model considering the random CM pile strength was established to investigate the deformation of the seawall.Due to the uncertainty of CM pile strength,the displacement of the seawall demonstrates a certain discreteness.The decrease of the mean undrained shear strength of CM piles causes a corresponding increase in the average displacement of the seawall.When the mean strength of CM piles is lower than a certain threshold,there is a risk of instability.Furthermore,the heterogeneity of the strength within an individual CM pile also has an impact on seawall displacement.Attention should be paid to the uncertainty of CM pile strength to control displacement and stability.
Construction uncertaintyCement mixing(CM)pileStrength of cement soilSeawall stabilityRandom finite element method(RFEM)Monte Carlo simulation(MCS)
Key Laboratory of Offshore Geotechnics and Material of Zhejiang Province,College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China
Ninghai Highway and Transportation Management Center,Ningbo 315600,China
Ninghai Traffic Engineering Construction Management Institute,Ningbo 315600,China
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