盾构法施工地面沉降预测分析研究

摘要

结合南京某地铁工程项目，选取9种预测模型（包括回归分析模型、GM（1，1）模型和函数模型），对盾构法施工期间引起的地面沉降量进行预测研究，对比分析各种模型精度，结果表明，玻尔兹曼函数模型和Logistic时间函数模型预测精度很高；进一步对模型进行改进，建立S－Q模型和G－L模型，验证表明，新模型的预测精度得到了提高，效果良好。%Here , nine prediction models (including regression analysis model ,GM (1 ,1 ) model and function model ) were chosen to study the ground settlement during shield construction of a metro project in Nanjing .The accuracy analysis and comparison of the nine models showed that boltzmann function model and Logistic time function model had the highest accuracy .And then S-Q model and G-L model were established based on the improvement of the 2 models with high accuracy .The prediction results prove that the improved models are applicable with even better prediction accuracy .