摘要
以哈尔滨地铁某区间为依托,利用有限元软件MIDAS/GTS建立隧道开挖的数值分析模型,将实际监测结果与模拟结果进行拟合,验证完模型合理性后基于此模型分析隧道开挖对土体水平位移及不同施工工况下单、双线隧道的变形情况。分析结果表明:双线隧道施工时,隧道纵向1.5倍洞径外几乎不受掌子面开挖影响且上部土体沉降影响范围处于4倍洞径范围内;双线隧道的最大水平位移出现在隧道外侧拱腰处;开挖台阶长度增加,引起的地表沉降越大,且双轴隧道的最大沉降位置偏向于较先施工的隧道。
Based on the tunnel of Harbin metro,the finite element models(FEM)are adopted to analyze the influences of tunnel excavation on vertical displacement of soil and deformation of tunnel using MIDAS/GTS,and the simulations re-sults are verified through the monitoring values.The results indicate that the construction of the face has limited effects on more than the distance of1.5Z)at the longitudinal direction and the influence range is4D for the above soil settlement in the construction of double-line tunnel,as for the double-line tunnel,the maximum vertical displacement appears at the arch of the tunnel.The ground settlement increases with the increase of step length,and the location of the maximum set-tlement is inclined to first tunnel of construction.
作者
陈菊
CHEN Ju(Shenyang Metro Corporation, Shenyang, Liaoning 110011, China)
出处
《水利与建筑工程学报》
2018年第1期230-235,共6页
Journal of Water Resources and Architectural Engineering
