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Reliability assessment for serviceability limit states of stiffened deep cement mixing column-supported embankments

Journal of Rock Mechanics and Geotechnical Engineering 2023年第9期15卷 2402-2422页

作者： Chana Phutthananon Pornkasem Jongpradist Kangwan Kandavorawong Daniel Dias Xiangfeng Guo Pitthaya Jamsawang Construction Innovations and Future Infrastructures Research Center Department of Civil EngineeringFaculty of EngineeringKing Mongkut’s University of Technology ThonburiBangkok10140Thailand Laboratory 3SR Grenoble INPCNRSGrenoble Alpes UniversityGrenoble38000France Department of Civil and Environmental Engineering National University of SingaporeSingapore119077Singapore Soil Engineering Research Center Department of Civil EngineeringKing Mongkut’s University of Technology North BangkokBangkok10800Thailand

The reliability and deterministic analyses of wood-cored stiffened deep cement mixing and deep cement mixing column-supported embankments(referred to as WSCSE and DCSE,respectively)considering serviceability limit state requirements are presented in this *** field theory was used to simulate the spatial variability of soilcement mixing(SCM)material in which the adaptive Kriging Monte Carlo simulation was adopted to estimate the failure probability of a columnsupported embankment(CSE)system.A new method for stochastically generating random values of unconfined compressive strength(qu)and the ratio(Ru)between the undrained elastic modulus and qu of SCM material based on statistical correlation data is *** performance of CSEs concerning changes in the mean(μ),coefficient of variation(CoV),and vertical spatial correlation length(θv)of qu and Ru are presented and *** obtained results indicate that WSCSE can provide a significantly higher reliability level and can tolerate more SCM material spatial variability than *** performance of DCSE and WSCSE,which can be considered satisfactory in a deterministic framework,cannot guarantee an acceptable reliability level from a probabilistic *** highlights the importance and necessity of employing reliability analyses for the design of ***,consideration of only μ and CoV of qu seems to be sufficient for reliability analysis of WSCSE while for DCSE,uncertainties regarding the Ru(*** μ and CoV)and θv of qu cannot be ignored.

关键词： Reliability analysis column-supported embankment(CSE) stiffened deep cement mixing column Serviceability Adaptive kriging Monte Carlo simulation

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