Taking the high refilled soft clay of the K18 +230 section of Miansui high way as the background,this paper researches the deformation law of fast-filling soft clay by the method of the combination of site monitoring and FLAC3D simulation. The result indicates that it is easy to emerge excess pore water pressure, form the plastic zone, and make the settlement curve to mutate under the circumstance of fast-filling the high refilled soft clay. The calculation result of pore pressure induced by the mechanics turbulence which is in the mode of FLAC3D no-seepage can on the whole reflect the trend of the deformation of soft clay and the excess pore water pressure which is induced by fast-filling the soft clay.%以绵遂高速公路K18+ 230段的软基高填方路段为工程背景,采用现场监测与FLAC3D数值模拟相结合的方法,对软土地基快速填筑时的变形规律进行了研究.结果表明,高填方软土路基快速填筑易导致地基土体中产生超孔隙水压力,形成塑性区,沉降曲线发生突变,且地基水平位移较大；FLAC3D无渗流模式下,力学扰动引起的孔压模拟计算结果总体上能反映软土路基快速填筑时引起的超孔隙水压力及变形发展趋势,对软土路基高填方施工有一定指导意义.
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