Red Clay Subgrade Settlement Calculation Methods in Ballastless Track Design on High － speed Railway

YANG Xiao; YANG Guolin

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Journal of Railway Engineering Society ›› 2011, Vol. 28 ›› Issue (5) : 27-33.

Red Clay Subgrade Settlement Calculation Methods in Ballastless Track Design on High － speed Railway

YANG Xiao，YANG Guolin

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Abstract

Research purposes: Considering high requirement and strict control on post － construction settlement of high － speed railway， settlement properties of red clay foundation was studied． Furthermore， proper settlement calculation method and corresponding modification coefficient was obtained after comparative analysis．

Research conclusions: Red clay foundation settlement was calculated by E S method，e ～ lg p method，3D stress method， secant modulus method and field test method，by which following conclusions could be drawn: settlement obtained from theoretical methods varied linearly with load increasing，however，significant deviation appeared with heavy load． Calculated settlement by layer － wise summation method was closest to measured value，while 3D stress method and secant modulus lead to a significantly larger settlement． Based on measured settlement，all calculations were modified in which ES method resulted in a closer curve.

Key words

high － speed railway / red clay subgrade / settlement calculation method / settlement correction factor

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YANG Xiao, YANG Guolin. Red Clay Subgrade Settlement Calculation Methods in Ballastless Track Design on High － speed Railway[J]. Journal of Railway Engineering Society, 2011, 28(5): 27-33

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