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

作　　者：Chana Phutthananon Pornkasem Jongpradist Kangwan Kandavorawong Daniel Dias Xiangfeng Guo Pitthaya Jamsawang 

机构地区：[1]Construction Innovations and Future Infrastructures Research Center,Department of Civil Engineering,Faculty of Engineering,King Mongkut’s University of Technology Thonburi,Bangkok,10140,Thailand [2]Laboratory 3SR,Grenoble INP,CNRS,Grenoble Alpes University,Grenoble,38000,France [3]Department of Civil and Environmental Engineering,National University of Singapore,Singapore,119077,Singapore [4]Soil Engineering Research Center,Department of Civil Engineering,King Mongkut’s University of Technology North Bangkok,Bangkok,10800,Thailand

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2023年第9期2402-2422,共21页岩石力学与岩土工程学报（英文版）

摘　　要：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 paper.Random field theory was used to simulate the spatial variability of soil
cement mixing(SCM)material in which the adaptive Kriging Monte Carlo simulation was adopted to estimate the failure probability of a column
supported 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 proposed.Reliability 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 discussed.The obtained results indicate that WSCSE can provide a significantly higher reliability level and can tolerate more SCM material spatial variability than DCSE.Some performance of DCSE and WSCSE,which can be considered satisfactory in a deterministic framework,cannot guarantee an acceptable reliability level from a probabilistic viewpoint.This highlights the importance and necessity of employing reliability analyses for the design of CSEs.Moreover,consideration of only μ and CoV of qu seems to be sufficient for reliability analysis of WSCSE while for DCSE,uncertainties regarding the Ru(i.e.both 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 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]