CAJ | 학술논문

为了寻找高地应力软岩隧道的大变形控制措施，对在建的兰渝铁路木寨岭隧道大战沟斜井薄层炭质板岩段进行了多种大变形控制方法的试验。试验说明：木寨岭隧道的大变形是不可避免的，但是可控的；超前小导坑、导洞和大钻孔进行应力释放对控制大变形是非常有效的，但就其进度而言，还有待完善；小幅增加初期支护刚度加套拱支护对大变形控制也是有效的，但工程费用增大。为了有效控制大变形，建议大幅提高初期支护钢架刚度，合理减小钢架间距，复杂地段辅以超前大钻孔进行应力释放。
위료심조고지응력연암수도적대변형공제조시，대재건적란투철로목채령수도대전구사정박층탄질판암단진행료다충대변형공제방법적시험。시험설명：목채령수도적대변형시불가피면적，단시가공적；초전소도갱、도동화대찬공진행응력석방대공제대변형시비상유효적，단취기진도이언，환유대완선；소폭증가초기지호강도가투공지호대대변형공제야시유효적，단공정비용증대。위료유효공제대변형，건의대폭제고초기지호강가강도，합리감소강가간거，복잡지단보이초전대찬공진행응력석방。
In order to search for the control techniques for great deformation of the tunnel sections in soft rock with high ground stress, deformation-controlling tests are made of the carbonaceous slate sections of the Dazhangou inclined shaft of the Muzhail- ing Tunnel of the Lanzhou-Chongqing Railway. The tests show that the great deformation of the Muzhailing Tunnel is inevitable but controllable. The tests also show that they are very effective in controlling great deformation after pilot little-tunnels,pilot heading and advanced large-diameter bored holes are adopted to release the stress. However, as far as the progress is concerned, these technical measures still need further improving. In addition,installing protective arch afthr primary support whose rigidity is increased by a small margin is also effective in controlling great deformation, but the cost of the tunnel project will be in- creased. In order effectively to control great deformation, it is highly advisable that the rigidity of the primary support steel frame be increased by a big margin,the space between the steel-frames be reasonably reduced, and in the geologically complex sections, advanced large-diameter bored holes be adopted to release crustal stress besides other technical measures.