施工技术 2016年10月上 30 CONSTRUCTION TECHNOLOGY 第45卷第19期 D0I:10.7672/5j52016190030 基于支持向量机的膨胀土深基坑变形预测研究 渠孟飞，谢强，李朝阳，贺建军 (西南交通大学地球科学与环境工程学院，四川成都610031) [摘要]以成都东郊某深基坑支护结构的水平位移值为研究对象，研究基于基坑监测数据的基坑变形预测对施工 的指导意义.分析预测结果表明，对于本基坑，工况未发生改变时，未来1~5周预测精度非常高，预测值可作为预 估值指导施工；工况变化时未来1~5周位移值的预测精度较低，需不断加入新近监测数据才能取得较好的预测精 度.最后指出，基坑位移的预测必须建立在对前期实测曲线严格分析的基础上，工况发生改变时的一段时间内应 密切关注监测数据的发展趋势，预测值仅供参考. [关键词]深基坑；位移：预测：支持向量机 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2016)19-0030-03 Prediction of Slope Displacement of Deep Foundation Excavation Based on Support Vector Machine Qu Mengfei Xie Qiang Li Zhaoyang He Jianjun Faculty of Geosciences and Environmental Engineering of Southwest Jiaotong University Chengdu Sichuan 610031.China) Abstract:Taking the horizontal displacement of deep foundation excavation which located at east of Chengdu as the study object the guiding significance of prediction results based on the previous monitor data is studied.The prediction results indicate that when the working condition unchanged the accuracy is very high for predicting the next 1 to 5 weeks displacements.When working condition changed the prediction accuracy of the model is lower for predicting the next 1 to 5 weeks displacements only the new monitor data was input into the model the accuracy can raise.Therefore the prediction work must be carefully used when working condition changed and it must be built on analyzing the monitoring curves in early stage. Key words:deep foundation excavation;displacement;prediction;support v...
基于支持向量机的膨胀土深基坑变形预测研究.pdf
