岩土力学2011，Vol.32Issue(8)：2300-2306,7.
风化千枚岩填筑路基湿化变形现场试验分析
Field experimental analysis of wetting deformation of filled subgrade with weathered phyllite
摘要
Abstract
In order to analyze the stability of soaked subgrade filled with weathered phyllite, wetting deformation and resilient modulus of the subgrade are tested in field at Ankang eastern section of Shiyan-Tianshui expressway. Based on physico-mechanical property analysis of weathered phyllite, filling scheme of subgrade is put forward: for subgrade filled material with weathered phyllite California bearing ratio (CBR) >3%, the weathered phyllite is filled into the subgrade directly; for CBR<3%, the weathered phyllite is filled into the subgrade after improved with additive 3% cement. Through bearing plate field tests before and after immersion on the test road, the influence of soaking amount, soaking time on wetting deformation, rate of wetting deformation and resilient modulus of subgrade are analyzed. Combined with water content test of the test points in different depths, relationships between water content, seepage depth and wetting deformation are analyzed. The results indicate that soaking amount and soaking time are key factors that affect the seepage depth and water content; the wetting deformation of soaked common subgrade is more obvious than that of soaked improved subgrade. When both soaking amount and soaking time are equal, the resilient modulus attenuation of common subgrade is larger than that of improved subgrade.关键词
风化千枚岩/水泥改良/承载板试验/湿化变形/含水率Key words
weathered phyllite/ cement improved/ bearing plate test/ wetting deformation/ water content分类
交通工程引用本文复制引用
毛雪松,郑小忠,马骉,梁杰,周雷刚..风化千枚岩填筑路基湿化变形现场试验分析[J].岩土力学,2011,32(8):2300-2306,7.基金项目
中央高校基本科研业务费专项资金(No.CHD2010ZD003):长安大学科技创新重点项目 （No.CHD2010ZD003）
特殊地区公路工程教育部重点实验室开放基金. （）
