隧道建设
隧道建設
수도건설
TUNNEL CONSTRUCTION
2015年
1期
83-88
,共6页
大断面黄土隧道%宝兰客运专线%监测%三岔口%前期变形%开挖优化
大斷麵黃土隧道%寶蘭客運專線%鑑測%三岔口%前期變形%開挖優化
대단면황토수도%보란객운전선%감측%삼차구%전기변형%개알우화
large cross-section loess tunnel%Baoji-Lanzhou passenger dedicated line%monitoring%junction section%early deformation%excavation optimization
为提高大断面黄土隧道关键部位的施工安全，通过监测数据分析，总结宝兰客专14标多个三岔口的变形规律，指出主隧道中台阶开挖和仰拱浇筑分别是变形发展和变形控制的关键时期，由此预测了古城岭隧道3＃斜井三岔口的最大变形，并优化了开挖方法，最终较好地控制了变形。
為提高大斷麵黃土隧道關鍵部位的施工安全，通過鑑測數據分析，總結寶蘭客專14標多箇三岔口的變形規律，指齣主隧道中檯階開挖和仰拱澆築分彆是變形髮展和變形控製的關鍵時期，由此預測瞭古城嶺隧道3＃斜井三岔口的最大變形，併優化瞭開挖方法，最終較好地控製瞭變形。
위제고대단면황토수도관건부위적시공안전，통과감측수거분석，총결보란객전14표다개삼차구적변형규률，지출주수도중태계개알화앙공요축분별시변형발전화변형공제적관건시기，유차예측료고성령수도3＃사정삼차구적최대변형，병우화료개알방법，최종교호지공제료변형。
The regularity of the deformation of the junction sections of tunnels in No.14 bid section of Baoji-Lanzhou passenger dedicated line is studied on basis of the monitoring results,so as to improve the construction safety of critical positions of large cross-section loess tunnels.It is concluded that the intermediate bench excavation and the invert casting are critical points in terms of deformation development and deformation control.Furthermore,the maximum deformation of the junction section of No.3 inclined shaft of Guchengling tunnel is predicted on basis of the study results,and the excavation method is optimized accordingly.In the end,the deformation of the mentioned junction section has been well controlled.
