Abstract: The experience method,such as the hyperbola method, which is often used in the engineering of highway embankment on soft ground , is incompetent for considering the influence of the variation of pretend, so it can't predict the post-construction setdenient of the surcharge pre-loading embankment well . By back-analysing the settlement of an surcharge preloading embankment , this paper fistly get the coefficient of settle-ment and the average coefficient of consolidation. Then utilizing these coefficients as calculation parameters and taking the influence of the sur-charge preload into account, this paper predict the post-construction settlement of an surcharge preloading embankment approximatively.For considering the influence of the surcharge preload, the result of this method is more coincident with the fact than that of the hyperbola method and other experience methods.

Key words: soft gmund , emhankment , surcharge preload, senlement , prrxliction

摘要： 目前公路软基路堤工程中常用的双曲线法等实测沉降经验推算法未考虑荷载变化对软基路堤工后沉降的影响,不能较好预测超载预压软基路堤的工后沉降.本文结合工程实践利用实测沉降反算沉降系数和软基平均固结系数,以此反算的系数为计算参数,同时考虑超载预压对工后沉降的影响,近似地预测了超载预压路堤的工后沉降.由于计算中考虑了超载预压部分对路堤工后沉降的影响,此方法预测的结果较双曲线法等实测沉降经验推算法更符合实际.

关键词: 软基, 路堤, 超载预压, 沉降, 预测