特长隧道施工阶段围岩分级的应用研究  

Application of Surrounding Rock Classification in Extra Long Tunnel Construction Stage

作　　者：郭瑞东 郝付军[2] GUO Ruidong;HAO Fujun(Shandong College of Highway Technician Jinan 250104,China;Shaanxi Railway Institute Weinan 714000,China)

机构地区：[1]山东公路技师学院,济南250104 [2]陕西铁路工程职业技术学院,陕西渭南714000

出　　处：《广东土木与建筑》2022年第6期21-25,共5页Guangdong Architecture Civil Engineering

摘　　要：特长隧道长度大、地质复杂,为了使围岩分级与实际的围岩相一致。运用TST技术、超前水平钻孔、监控量测重新确定掌子面前方的地质状况,对围岩再次分级。结论得出设计阶段围岩分级主要对指导设计和招投标具有指导意义,而运用TST技术由于距离短、结果更准确;通过超前水平钻孔过程发生的现象可以判别岩性,监控量测表明了接触压力稳定时间的短长和变化率的大小与围岩等级的高低有关。研究内容对类似工程具有参考意义。The extra long tunnel has a long length and complex geology. In order to make the classification of surrounding rock consistent with the actual surrounding rock. The geological conditions in front of the tunnel face are determined again by using TST technology,advanced horizontal drilling and monitoring measurement,and the surrounding rock is graded again. It is concluded that the classification of surrounding rock in the design stage is mainly of guiding significance for guiding design and bidding,while the application of TST technology has more accurate results due to short distance;The lithology can be distinguished by the phenomenon occurred in the process of advanced horizontal drilling. The monitoring measurement shows that the short stability time and change rate of contact pressure are related to the grade of surrounding rock.

关 键 词：施工围岩分级 TST技术 超前钻孔 监控量测 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]