摘要
研究目的:为了实现对大埋深高地应力隧道围岩大变形的合理分级和预测,通过统计梳理72处国内外大埋深高地应力隧道大变形案例,选取应力条件、围岩力学特征、地下水、岩层产状四方面的12个评价指标,构建大埋深高地应力隧道大变形分级评价体系,以成兰铁路某隧道为案例进行分析验证,最后选取了15座具有显著大变形特征的隧道,将本研究提出的评价方法与现有的大变形预测方法进行对比分析,进一步验证该方法的可行性。研究结论:(1)该大埋深高地应力隧道大变形分级评价体系预测结果正确率为93.3%,可有效对隧道大变形程度进行预测;(2)该方法将定性分析的过程转化为对定量指标的计算,有助于隧道大变形防治措施制定的科学性,该评价体系的建立也可为后续类似工程提供参考。
Research purposes:Classification and prediction of large deformation is one of the key points in the study of large deformation in tunnels.Through statistical combing of 72 cases of large deformation of domestic and foreign deep tunnels,12 evaluation indexes in four aspects of stress conditions,mechanical characteristics of the surrounding rock,groundwater,and rock yield are selected to construct a large deformation grading evaluation system for large deep and high stress tunnels,and a tunnel of the Chengdu-Lanzhou Railway is used as a case study for analysis and verification,and finally 15 tunnels with significant deformation characteristics are selected for comparison and analysis of the evaluation method proposed by the present study with the existing large deformation prediction methods.Research conclusions:(1)The prediction result of the large-deformation grading evaluation system for large-deep and high-stress tunnels is 93.3%,which can effectively predict the degree of large deformation of tunnels.(2)The method transforms the process of qualitative analysis into the calculation of quantitative indexes,which contributes to the scientific development of the prevention and control measures of tunnel deformation,and the establishment of the evaluation system also can provide reference for the subsequent similar projects.
作者
蒋肼
JIANG Jing(China Railway Construction Investment Group Corporation Limited,Beijing 100855,China)
出处
《铁道工程学报》
北大核心
2025年第5期77-82,共6页
Journal of Railway Engineering Society
基金
国家自然科学基金项目(52478406)。
关键词
铁路隧道
大变形分级
模糊综合评判法
高地应力
railway tunnel
large deformation classification
fuzzy comprehensive evaluation method
high ground stress
