摘要
文章通过对一陡倾山体中开挖连拱隧道进洞顺序进行模拟对比分析,以确定陡倾连拱隧道合理的开挖方案,分析得出:1不同进洞顺序对地表累积沉降、累积水平位移总量与拱顶沉降曲线累积值相差不大,只是因开挖顺序不同,其对应的变形增长分析步有所不同.2衬砌的受力以拱部与中隔墙结合部位最大,设计施工过程中,中隔墙与拱部的结合部位就作为重点控制部位.3中隔墙的位移分布很不均匀,表现为上部较大下部较小,偏向浅埋侧,但先深埋侧后浅埋侧顺序产生的最大位移明显大于先右后左顺序所产生的值.根据文中不同开挖顺序产生的位移可知:先深埋侧后浅埋侧顺序施工利于中隔墙位移的控制等.
Based on the simulation analysis of the excavation order of a multi-arch tunnel in the steep mountain, a reasonable excavation scheme is established. The results show that： when holes are in different order conditions, accumulation of surface subsidence, cumulative amount of horizontal displacement and arch sedimentation value are similar, and because of different excavation order, the corresponding deformation growth analysis step is different; Largest stress parts of lining is the arch of the middle wall attaches, therefore, in the process of design and construction, the key control areas is the arch of the middle wall attaches; The distribution is very uneven of middle wall displacement, with the upside larger, the bottom smaller, and the middle wall to shallow buried side, the maximal displacement of left-right order is significantly greater than the value of the right-left order. It is concluded that the left-right order is beneficial for middle wall displacement control.
出处
《江西理工大学学报》
CAS
2017年第1期9-15,共7页
Journal of Jiangxi University of Science and Technology
关键词
陡倾连拱隧道
数值模拟
开洞顺序
对比分析
steep dip multi-arch tunnel
numerical simulation
the excavation order
comparative analysis
