摘要
旋喷桩施工技术具有施工快捷、成本低的特点,在水坝基底处理、隧道加固等方面应用广泛,但在施工过程中往往存在变异性大的特点,给设计带来一定的挑战。基于国内外不同施工现场的真实案例,总结并建立了全面的数据库,采用贝叶斯模型选择方法建立了单重管、二重管以及三重管三种施工工艺的最优预测模型。最优预测模型在测试集上对旋喷桩直径的预测结果与实际测量值吻合较好,计算的95%置信区间可以包括几乎所有的实际测量值,说明建立的模型预测精度高、鲁棒性强。研究结果表明,除旋喷能量外,土体类型对旋喷柱直径预测有显着影响。
The jet grout method is popular in soil improvement projects,such as dams and tunnel foundations etc.due to its cost efficiency and quick construction.The estimation of the column diameter of the jet grout is much more significant at the design stage.In this study,three optimal models with explicit formulas were established to predict the diameter of jet grout columns based on a comprehensive database summarized from different case histories around the world.The Bayesian model selection was used to determine the best model related to the three popular jet grout systems(i.e.,single,double,and triple),respectively.The 95%credible intervals were estimated at the same time and the estimation on the column diameter of jet grout using the proposed models agrees well with the measured ones in practical projects.It is concluded that,except for the jet grout energy,the soil type has a significant influence on the diameter prediction of jet grout columns.
作者
谢艺东
李汕青
朱玉清
徐超
XIE Yidong;LI Shanqing;ZHU Yuqing;XU Chao(Shenzhen Geokey Group Co.Ltd.,Shenzhen 518057;Shantou University,Shantou 515063)
出处
《土工基础》
2025年第5期760-763,共4页
Soil Engineering and Foundation
关键词
旋喷桩
显式模型
贝叶斯模型选择
半解析模型
Jet Grout Column
Explicit Form
Bayesian Model Selection
Semi-Analytical Model
