Baihe Tunnel of Lintao(Anjiazui)-Linxia first-class highway is Grade V surrounding rock,mainly including loess shallow buried section,rocky section,loess deep buried section,small clearance section and loess deep buried section.According to different surrounding rock conditions and geological conditions,CD method,upper and lower benches retaining core soil method and three bench step-by-step method are targeted for excavation.
关键词
黄土浅埋段/小净距隧道/CD法/上下台阶留核心土法/三台阶分步法
Key words
shallow buried loess section/small clear distance tunnel/CD method/core soil method for retaining upper and lower steps/three step step-by-step method
维普
万方数据