摘要
针对某地铁区间地层为全断面硬岩、软硬混合地层及残积土层复合地层条件下盾构施工遇到的技术难题,通过盾构掘进参数分析,得到了硬岩段及地层转换时施工参数的变化规律。通过采取刀具优化配置、合理安排刀具更换时机、掘进模式选择、掘进参数合理匹配、同步注入泡沫及跟踪二次注浆等措施,实现了在硬岩段间杂软弱岩的地层中及软硬岩地质界面处盾构快速、安全掘进施工,拓宽了盾构的应用领域。
In view of technical problems in shield tunnel construction of a metro running with full face hard rock,mixed strata of soft and hard rocks and eluvia complex strata,through analysis of the shield boring parameter,the study obtains the change rule of the construction parameters in hard rock section and the strata change.Fast and safe shield tunneling boring is achieved in hard rock section and intermingled weak layers and the geological interface of hard and weak rock by measures of optimizing tool configuration,proper arrangement of the tool replacement timing,boring mode selection,rational matching boring parameter,synchronous injecting foam and secondary grouting etc.It broads shield＇s application
出处
《铁道建筑技术》
2013年第8期17-22,64,共7页
Railway Construction Technology
关键词
盾构隧道
复合地层
掘进参数
shield tunnel
complex stratum
boring parameter
