岩土力学2017，Vol.38Issue(3)：649-655,7.DOI:10.16285/j.rsm.2017.03.005
基于围岩相互作用的冻结壁弹塑性分析对比研究
Comparative study of elastoplastic of frozen wall based on interaction of surrounding rock
摘要
Abstract
The purpose of elastoplastic analysis for frozen wall is not only to reduce the thickness of frozen wall,but also to provide reference for the reliability design.The development of elastoplastic analysis for frozen wall is reviewed,and the elastoplastic mechanical model of frozen wall is studied based on the elastic analysis of"Baoshen" formula.The analytical solutions of the stress field and displacement field are deduced and compared with different mechanical models.Then a discriminant for the horizontal initial stress and the plastic zone radius under different yield criteria are also investigated when the frozen wall is approaching plasticity.According to engineering case studies,the critical edge pressure,the plastic zone radius and the load on elastic zone are analyzed under different initial stress levels and different yield criteria.The results show that the critical edge pressure of the frozen wall is increased by 32％,the radius of the plastic zone is decreased by 14.5％,and the load of the frozen wall is decreased by 23.3％,which provide the data support for the reliability analysis of the design of the frozen wall thickness.关键词
冻结壁/围岩/“包神”公式/弹塑性分析/屈服准则Key words
frozen wall/surrounding rock/"Baoshen" formula/elastoplastic analysis/yield criterion分类
数理科学引用本文复制引用
管华栋,周晓敏..基于围岩相互作用的冻结壁弹塑性分析对比研究[J].岩土力学,2017,38(3):649-655,7.基金项目
国家自然科学基金面上项目(No.51678048).This work was supported by the National Natural Science Foundation of China (51678048). （No.51678048）
