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研究目的:对采用CFG桩复合地基进行处理的某客运专线路基的沉降分别采用工程上常用的4种预测方法:双曲线图解法,双曲线法,三点法,指数法进行预测分析;并采用五次多项式对实测沉降数据进行磨光处理,极大程度上避免了由测量带来的误差以及实测沉降数据的非等时距性,为类似地基处理方式的沉降预测提供借鉴。研究结论:采用五次多项式插值可以避免因环境等,带来测量误差,使沉降曲线变得光滑;避免了因观测的不等时性而带来的选点困难;从四种预测方法的结果看,三点法预测效果最好,相关系数也最大,双曲线法预测结果最大。
Research purposes: The subgrade settlement of a passenger dedicated line treated with CFG pile composite foundation are respectively predicted by four kinds of prediction methods commonly used in engineering: hyperbolic graph method, hyperbolic method, three-point method and exponential method. Fifth-order polynomial polishing data measured settlement, to a great extent, to avoid the error caused by the measurement and the measured data of the non-isochronous settlement time for similar subsidence settlement prediction methods provide a reference. Research conclusions: The fifth-order polynomial interpolation can avoid the measurement errors caused by the environment and so on, and make the settlement curve smooth; avoid the difficulty of the selection point caused by the unequal time of observation; and from the results of the four prediction methods Look, the three-point forecasting the best, the correlation coefficient is also the largest, hyperbolic forecast the greatest.