This paper presents a postconstruction settlement prediction method for pile-soil composite subgrade based on the multilevel fuzzy comprehensive evaluation principle. In this method, the variation range of postconstruction settlement can be obtained from a simple calculation based on the basic data of actual engineering. Firstly, according to the characteristics of influencing factors in the construction of soft soil subgrade, the evaluation index set and two-level factor index sets were selected. The grading standards of the evaluation index and factor index were determined according to the allowable value of the standard and the numerical simulation results. Secondly, each factor index was standardized, and the normal distribution function in the form of exponential was used to construct the standard membership function for the first and second factor indexes. Finally, the comprehensive evaluation matrix of postconstruction settlement of composite subgrade was constructed based on the entropy weight method. The variation range of postconstruction settlement was predicted by the principle of maximum membership. The example analysis shows that the predicted results of the prediction method and the field measurement method are in good agreement, indicating that the proposed method can realize the postconstruction settlement prediction of composite subgrade, and the results are more accurate and more instructive.

中文翻译：

---

基于模糊综合评价的桩土复合路基工后沉降预测方法

提出了一种基于多层次模糊综合评价原理的桩土复合路基工后沉降预测方法。该方法可以根据实际工程的基础数据，通过简单的计算得到工后沉降的变化范围。首先，根据软土路基施工影响因素的特点，选取评价指标集和二级因素指标集。根据标准允许值和数值模拟结果确定评价指标和因子指标的分级标准。其次，对各个因子指标进行标准化，用指数形式的正态分布函数构造第一和第二因子指数的标准隶属函数。最后，基于熵权法构建复合路基工后沉降综合评价矩阵。根据最大隶属度原则预测了工后沉降的变化范围。算例分析表明，该预测方法与现场实测方法的预测结果吻合较好，表明该方法能够实现复合路基工后沉降预测，结果更加准确，更具指导意义。基于熵权法构建复合路基工后沉降综合评价矩阵。根据最大隶属度原则预测了工后沉降的变化范围。算例分析表明，该预测方法与现场实测方法的预测结果吻合较好，表明该方法能够实现复合路基工后沉降预测，且预测结果更准确，更有指导意义。基于熵权法构建复合路基工后沉降综合评价矩阵。根据最大隶属度原则预测了工后沉降的变化范围。算例分析表明，该预测方法与现场实测方法的预测结果吻合较好，表明该方法能够实现复合路基工后沉降预测，且预测结果更准确，更有指导意义。