Novel Excavation and Construction Method of an Underground Highway Tunnel above Operating Metro Tunnels
Novel Excavation and Construction Method of an Underground Highway Tunnel above Operating Metro Tunnels
复制标题
运营地铁隧道上方地下公路隧道开挖施工新方法
DOI：
10.1061/(asce)as.1943-5525.0000437
复制
发表时间：
2015-11-01
影响因子：
2.4
通讯作者：
Wen, Suo-Lin
中科院分区：
文献类型：
--
作者：
Chen, Jin-Jian;Zhu, Yan-Fei;Wen, Suo-Lin
摘要地铁隧道的安全是极其重要的，但新建地下工程对既有隧道的影响也变得越来越重要。为控制既有隧道因相邻开挖引起的变形，提出了一种跨下垫面隧道开挖的新施工方法--分段交替开挖法。在该方法中，通过设置多个隔墙，将上覆基坑划分为多个独立的小坑。施工过程中，多个小坑间隔同时开挖，其他坑中的剩余土体可以抵抗隧道隆起。在这些坑洞的地下结构建成后，将土壤回填到它们的屋顶上，以减少现有隧道的回弹，然后就可以建造剩下的小坑了。该施工方法适用于地铁运营隧道上方的隧道开挖。现场数据显示，这部小说……
AbstractSecurity of metro tunnels is extremely important, but the influence of new underground construction on existing tunnels has become more and more important. To control the existing tunnel deformation induced by an adjacent excavation, a novel construction method for excavations crossing above underlying tunnels, referred to as the divided alternate excavation method (DAEM), is presented in this paper. In this method, several dividing walls are constructed to divide the overlying excavation into small independent pits. During construction, several small pits are excavated at intervals simultaneously, and the remaining soil in other pits can resist the tunnel heave. After the underground structures of these pits are constructed, soil is backfilled onto their roof to decrease the rebound of the existing tunnels, and the remaining small pits can then be constructed. The proposed construction method is applied in the case of tunnel excavation above running metro tunnels. Field data reveal that the novel...