摘要
围岩分类在隧洞设计施工中起着重要作用。双护盾隧洞掘进机(TBM)作为掘进支护效率最高的TBM类型,受限于其封闭的施工环境,难以获取传统的围岩分类方法所需参数,无法支撑施工过程中的围岩分类。以复杂地质条件区某越岭隧道双护盾TBM掘进全过程数据为基础,基于涵盖“岩机渣”的围岩地震波波速、贯推比和岩渣含量等参数的定量分析,提出了适用于双护盾TBM施工环境的DT围岩多因素综合分类方法。结果表明:(1)片状岩渣含量、贯推比和岩体地震波波速3个因素可反映双护盾TBM施工隧洞围岩质量;(2)单因素分析显示片状岩渣含量、贯推比和岩体地震波波速和围岩质量呈良好的相关性,局部破碎洞段离散性较大;(3)DT多因素围岩分类可综合反映围岩岩体质量,和传统HC围岩分类相比,围岩类别划分成果基本一致,误差相差在3%以下;(4)DT多因素围岩分类方法具有参数获取便捷、实时、客观和可量化等特点,在围岩快速支护和预防卡机等方面具有重要的应用价值。
Rock mass classification plays a key role in the tunnel design and excavation.Being limited to an enclosed area,the tradition rock classification method is difficult to adapt to double-shield TBM excavation.Based on the whole process of double-shield TBM excavation of tunnels in areas with complex geological conditions,this paper proposes a comprehensive classification method(DT)of surrounding rock suitable for double-shield TBM construction conditions.The results show that:(1)Content of schistose muck,penetration ratio and seismic wave velocity of rock mass are the three main characterization factors of surrounding rock quality during double-shield TBM constructing;(2)The three main factors have a good correlation on surrounding rock classification;(3)Compared with the traditional HC method,DT classification method can comprehensively reflect the quality of the surrounding rock mass within 3%error.(4)According to the three main factors can be obtain with the characteristics of convenient,real-time,objective and quantization during double-shield TBM constructing,the surrounding rock classification by DT method is more meticulous in the same tunnel section.
作者
张世殊
赵小平
钟果
冉从彦
胡金山
Zhang Shishu;Zhao Xiaoping;Zhong Guo;Ran Congyan;Hu Jinshan(Powerchina Chengdu Engineering Corporation Limited,Chengdu 610072,P.R.China)
出处
《地下空间与工程学报》
北大核心
2025年第5期1662-1669,共8页
Chinese Journal of Underground Space and Engineering
基金
中国电建集团科研项目(P31515-04)。
关键词
双护盾TBM
片状岩渣
贯推比
地震波波速
围岩分类
double shield TBM
schistose muck
penetration ratio
seismic wave velocity
surrounding rock classification
