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针对城市轨道交通–地铁工程在城市中复杂地理环境下采用浅埋暗挖法施工,从而避免明开施工带来的交通阻断、城市市政管道改移等给出行人们生活带来的不便。暗挖法施工一般流程包括超前支护、开挖(根据具体隧道断面及施工要求选择不同工法的开挖方法)、初期支护三个部分。暗挖法施工的原则十八字方针为:管超前、严注浆、短进尺、强支护、快封闭、勤量测。
For the urban rail transit - subway project in the city under the complex geographical environment using shallow buried undercutting construction, so as to avoid the traffic congestion caused by the open construction, urban municipal pipeline relocation and other given the inconvenience of pedestrian life. The general process of undercutting construction includes advanced support and excavation (according to the specific tunnel section and construction requirements, choose different methods of excavation), the initial support of three parts. The principle of undercut construction eighteen word principle: tube ahead, strict note pulp, short footage, strong support, fast closure, diligence measurement.