昨天掘进盾构到达位于长江下面的8.95公里长的第二条交通隧道通道末端。
The digging shield for the second passage of the vehicle tunnel reached the end of the 8.95-kilometer line under the Yangtze yesterday.
盾构掘进法开挖隧道引起的地表沉降对地面建筑物影响在地下工程施工中越来越受到人们的关注，而这个问题的关键是要对地表沉降进行预估。
The influence of surface subsidence on ground building, caused by shield tunneling is concerned by more people, but the key of this problem is to pre-estimate the surface subsidence.
盾构机掘进过程中不但会引起土层的沉降，而且会引起土层沿盾构机前进方向的纵向位移和垂直于隧道掘进方向的横向位移。
Shield tunneling may cause not only the soil settlement, but also the longitudinal and transversal displacements in the respect to direction of shield advancing.
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