Accumulative Settlement of Saturated Silt Subgrade Under Cyclic Traffic-loading
Uneven settlement of silt subgrade under cyclic traffic-loading increases sharply mainte nance costs and brings about track irregularities, which affect driving safety and comfort.In order to investigate the accumulative settlement behavior of silt subgrade, this paper first presents dynam ic model test of no-ballasted track subgrade for high-speed railway, which directly obtains dynamic mechanical properties and the development law of accumulative settlement.Then it conducts dy namic triaxial test of Qiantang River silt, which is used as test model foundation, to investigate the development law of cumulative strain of the silt under cyclic loading.The relationship between the cumulative axial strain of the specimen with the nominal number of cyclic has a unique form under different working conditions, which is independent with confining pressure and cyclic stress ratio.Hence in paper a prediction model of the cumulative strain is proposed, which has a good match with model test.
cyclic loading model test triaxial test silt soil accumulative settlement
X.Xu H.G.Jiang X.C.Bian Y.M.Chen
Institute of Geotechnical Engineering, MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou China
国际会议
第六届国际环境振动学术研讨会(6th International Symposium on Environmental Vibration)(ISEV2013)
上海
英文
493-501
2013-11-08（万方平台首次上网日期，不代表论文的发表时间）