Stress and deformation due to embankment widening with different treatment techniques

Abstract：A two-dimensional (2-D) finite element (FE) model was developed to analyze the deformation and stress of embankment on soft ground due to widening with different treatment techniques.It is found that the embankment widening induces transverse gradient change due to differential settlements and horizontal outward movements at the shoulder of the existing embankment.Embankment widening also increases the shear stress along the slope of the existing embankment,especially at the foot of slope.The failure potential due to embankment widening may increase with the increase of widening width when the widening width is smaller than 8.5 m,but may decrease with the increase of widening width as the widening width is greater than 8.5 m.The effectiveness of four ground and embankment treatment techniques,including geosynthetic reinforcement,light-weight embankrnent,deep mixed columns,and separating wall were compared.The results indicate that these treatments reduce the differential settlements and improve the stability.The light-weight embankment has the most effectiveness among four treatments.By using the fly-ash backfill material in widening,the transverse gradient change decreases from 0.5％-1.3％ to 0.26％-0.8％ and the maximum horizontal displacement decreases from 2.76 cm to 1.44 cm. 作者： Author： WANG Hao[1]  HUANG Xiao-ming[2] 作者單位： Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign,IL 61866, USASchool of Transportation, Southeast University, Nanjing 210096, China 期 刊： 中南大學(xué)學(xué)報(bào)(英文版)   EISCI Journal： Journal of Central South University of Technology(English Edition) 年，卷(期)： 2011, 18(4) 分類號(hào)： U416.1 Keywords： finite element model    ground treatment    road widening    geosynthetic reinforcement    light-weight embankment    deep mixed columns    separating wall    機(jī)標(biāo)分類號(hào)： S56 F23 機(jī)標(biāo)關(guān)鍵詞： treatment techniques    different    effectiveness    decreases    backfill material    shear stress    especially    four    results    improve    model    found    soft    deep    2-D 基金項(xiàng)目：

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