深埋隧道围岩突变失稳风险预测  

Instability forecast and risk evaluation of the surrounding rock masses for deep-lying tunnel

作　　者：刘春[1] 易俊[1] 姜德义 李世贵[1] 

机构地区：[1]重庆科技学院安全工程学院,重庆400042 [2]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆400044

出　　处：《中国矿业》2008年第3期93-95,共3页China Mining Magazine

基　　金：国家自然科学基金重点项目(No.50334060)资助课题

摘　　要：利用突变理论,基于现场拱顶下沉实测资料,建立了隧道开挖围岩失稳的尖点突变模型,导出了失稳的力学判据条件。结合工程实例进行预测,预测结果与现场施工情况一致。所提出的预测模型,可为预防深部隧道失稳破坏、采取合理施工措施提供参考依据。Applying the catastrophe theory,based on observed data of surrounding rock deformation,the cusp catastrophe model of instability of deep-lying tunnels is established.The mechanical criterions of instability are educed.The analysis of an actual case shows that the research results are consistent with the surrounding rock stability of the demonstration project field.The present results can offer references for preventing instability and damage of deep-lying tunnels,taking reasonable construction measurements.

关 键 词：突变理论 隧道失稳 尖点突变模型 

分 类 号：TB24[一般工业技术—工程设计测绘]