铁路隧道BQ法、Q值法、RMR法相互关系研究  

Study on Correlation between BQ Method,Q Value Method and RMR Method of Railway Tunnel

作　　者：王游悬 沈伟升[1] 华丽晶[1] 郑世龙 WANG Youxuan;SHEN Weisheng;HUA Lijing;ZHENG Shilong(China Railway Siyuan Survey and Design Group Co.Ltd,Wuhan,Hubei 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道工程学报》2024年第8期79-85,共7页Journal of Railway Engineering Society

基　　金：中铁第四勘察设计院集团有限公司重点科研项目(2021K074)。

摘　　要：研究目的:围岩等级是铁路隧道设计和施工需确定的关键参数,随着中国铁路“走出去”战略的深入实施,我国设计工程师与国际咨询在隧道围岩分级方法的选取和应用上往往难以达成共识,从而影响海外工程的顺利开展。为研究围岩分级国标BQ法与国际主流Q值法和RMR法间的相互关系,总结对比BQ法、Q值法、RMR法三种围岩分级方法间差异,选取国内外多座代表性铁路隧道,对同一里程掌子面分别采用上述三种方法进行围岩分级,并结合其他文献研究成果,对分级结果进行对比分析。研究结论:(1)Q值法、RMR法在实际工程应用中均存在利弊,现场围岩等级的确定宜结合国标BQ法相互校核得出结论;(2)[BQ]值和Q值间关系符合指数函数,[BQ]值和RMR值间符合线性关系,Q值和RMR值间关系符合对数函数;(3)不同文献在BQ法、Q值法、RMR法间相互关系研究成果差异性大小方面,Q值和RMR值关系最小,也最为成熟,[BQ]值和RMR值关系次之,[BQ]值和Q值关系最大;(4)本文建立了国标BQ法与国际Q值法和RMR法间围岩等级划分对应关系表,在无法应用BQ法划分围岩级别情况下,可通过查表帮助国内设计人员理解和选择围岩支护体系,研究成果将有利于国标BQ法与国际Q值法和RMR法间的相互借鉴和融合,对海外隧道工程设计和施工具有一定指导意义。Research purposes:Surrounding rock classification is a key parameter to be determined in the design and construction of railway tunnels.With the in-depth implementation of China's railway"going out"strategy,it is often difficult for Chinese design engineers and international consultants to reach a consensus on the selection and application of tunnel surrounding rock classification methods,thus affecting the smooth development of overseas projects.In order to study the correlation between Chinese standard BQ method and the international mainstream Q value method and RMR method,the three surrounding rock classification methods,BQ method,Q value method and RMR method,were summarized and compared,and a number of representative railway tunnels at home and abroad were selected to use the above three methods to classify the surrounding rock on the tunnel face of the same chainage,and the classification results were compared and analyzed in combination with other literature research results.Research conclusions:(1)Q value method and RMR method both have advantages and disadvantages in practical engineering applications,and the determination of site surrounding rock grade should be combined with the Chinese standard BQ method to reach a conclusion.(2)The relationship between[BQ]value and Q value conforms to exponential function,the relationship between[BQ]value and RMR value conforms to linear relationship,and the relationship between Q value and RMR value conforms to logarithmic function.(3)In terms of the difference of research results on the relationship between BQ method,Q value method and RMR method in different literatures,the relationship between Q value and RMR value is the smallest and most widely used,followed by the relationship between[BQ]value and RMR value,and the relationship between[BQ]value and Q value is the largest.(4)This paper establishes a corresponding relation table between the Chinese standard BQ method,the international Q value method and the RMR method for the classification of surrounding rock

关 键 词：围岩分级 BQ法 Q值法 RMR法 相互关系 

分 类 号：U25[交通运输工程—道路与铁道工程]