现代隧道技术
現代隧道技術
현대수도기술
Modern Tunnelling Technology
2015年
5期
10-15
,共6页
特殊复杂地质%隧道%建设难点%对策
特殊複雜地質%隧道%建設難點%對策
특수복잡지질%수도%건설난점%대책
Special complicated geological conditions%Tunnel%Construction difficulties%Countermeasures
兰渝铁路主要通过黄土、第三系泥岩及砂岩、板岩、炭质板岩及千枚岩等软岩地层,区域断裂、褶皱发育,多为高—极高地应力区,地质条件极其复杂. 文章结合兰渝铁路兰广段施工中出现的诸多技术难题,着重阐述了第三系泥质弱胶结富水粉细砂岩层的施工问题以及采取的技术处理措施;并针对高地应力软岩隧道大变形问题,分析了挤压性软岩变形及受力特征,提出了兰渝铁路软岩大变形大变形分级标准及主要控制措施.
蘭渝鐵路主要通過黃土、第三繫泥巖及砂巖、闆巖、炭質闆巖及韆枚巖等軟巖地層,區域斷裂、褶皺髮育,多為高—極高地應力區,地質條件極其複雜. 文章結閤蘭渝鐵路蘭廣段施工中齣現的諸多技術難題,著重闡述瞭第三繫泥質弱膠結富水粉細砂巖層的施工問題以及採取的技術處理措施;併針對高地應力軟巖隧道大變形問題,分析瞭擠壓性軟巖變形及受力特徵,提齣瞭蘭渝鐵路軟巖大變形大變形分級標準及主要控製措施.
란투철로주요통과황토、제삼계니암급사암、판암、탄질판암급천매암등연암지층,구역단렬、습추발육,다위고—겁고지응력구,지질조건겁기복잡. 문장결합란투철로란엄단시공중출현적제다기술난제,착중천술료제삼계니질약효결부수분세사암층적시공문제이급채취적기술처리조시;병침대고지응력연암수도대변형문제,분석료제압성연암변형급수력특정,제출료란투철로연암대변형대변형분급표준급주요공제조시.
The stratum passed by the Lanzhou-Chongqing railway is mainly loess, tertiary mudstone and sandstone, slate, carbonaceous slate and phyllite rock with regional faults, developed folds and high or extremely high geostress; therefore, the geological conditions are very complicated. In light of the technical problems during construction of the Lanzhou-Guangyuan section of the Lanzhou-Chongqing railway, this paper emphatically describes the construction problems encountered in tertiary weak consolidated pelitic fine water-rich siltstone, adopts countermeasures and analyzes characteristics of the soft rock squeezing deformation and stress state regarding tunnels in soft rock with high geostress. The grading standards and major control measures are presented for the large deformation of soft rock tunnels on the Lanzhou-Chongqing railway.
