软土强度低、压缩性大、含水量高、孔隙比大和灵敏度高，这些工程不良特性导致软土路基存在诸多与沉降密切相关的隐患。基于此，新建公路的软土路基施工过程中都会开展沉降量监测及预测工作。本研究以广东省潮惠高速公路A1标段K3+240里程处软基断面为例，利用沉降量观测结果进行基于双曲线法、指数法、泊松法和Asaoka法的沉降定量化预测。预测结果表明，不同部位的监测结果与不同预测方法相吻合，建议软基的沉降预测可综合利用上述几种方法。%Abstrct:As with the characteristics of low strength, high compressibility, high water content, high void ratio and high sensitivity for soft soil, many potential dangers may appear in the settlement of the soft soil subgrade. Thus, it is common to carry out the settlement of monitoring and forecasting work during the construction of new expressway. In this paper, the soft foundation section at the mileage of K3+240 of A1 section from Expressway Chaohui in Guangdong province is studied. Different quantitative predictions of settlement, including hyperbola method, index method, poisson process method and Asaoka method, are used to predict the subgrade settlement according to the re-sult of settlement observation. As shown in the prediction results, the monitoring results of different parts are consis-tent with different forecasting methods, and the proposed method can be used to predict the settlement of soft soil foundation.
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