Through the compare we can draw a conclusion that the gray forecasting precision is the best, the exponential curve method is the second best, and the logarithmic curve method is the worst.

通过比较说明：灰色预测精度最高，指数曲线法次之，对数曲线法最低。

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The hyperbolic curve method and the exponential curve method are used to forecast embankment settlement of the highway around Harbin city, meanwhile total embankment settlement is calculated.

采用双曲线和指数曲线两种拟合方法对实测数据进行了曲线拟合计算，同时采用分层总和法对路基总沉降进行了计算。

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