摘要
为有效保证既有隧道改造施工及周边环境的安全,分别对隧道单侧扩挖和双侧扩挖两种改造施工工况进行了有限元分析和安全评估,确定了利用既有隧道边墙作为初期支护,开挖时采用跳槽施工,最后施作防水、仰拱二衬混凝土、仰拱填充混凝土及施工拱墙二衬的方法。为城市地铁利用地下人防、既有隧道改造积累了经验,具有较强的推广意义和价值。
In order to ensure the safety of the existing tunnel reconstruction and the surrounding environment, the excavation conditions of the excavation and the excavation of both sides of the tunnel were analyzed by finite element method, and the safety assessment was carried out. For the future use of underground subway urban air defense, the transformation of existing tunnel has accumulated experience, has a strong significance and value of the promotion.
出处
《建筑技术开发》
2017年第1期63-66,共4页
Building Technology Development
关键词
地铁暗挖区间施工
既有人防隧道
洞体改造
underground metro ： reconstruction of existing civil air defense tunnel ： body piercing transformation
