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2012年01期
| 标题 |
| 杉树坳隧道台阶法开挖初期支护变形规律分析(52卷) |
| 英文标题 |
| Analysis on deformation regularity of primary support in Shanshuao tunnel by bench method |
| 摘要 |
| 以杉树坳隧道工程为背景，分析了台阶法施工的拱顶下沉规律，主要是台阶法衬砌变形与开挖施工进度的关系，探究应力释放过程，对监测数据进行分析得出，上台阶开挖导致拱顶沉降量达到总沉降量的70%以上，进而得到施工过程中的应力释放系数。将此应力释放系数应用于有限元模型计算，把数值计算成果与拱顶下沉实测值进行了比较，证明了该模型能够较为准确地反映上下台阶开挖对初期支护变形的影响，从而为台阶法开挖的数值模拟以及施工过程的控制提供依据。 |
| 作者 |
| 新闻作者:马显红 |
| 关键字 |
