向地下要空间已成为现代城市用地尤其是大型建筑规划发展的主流,这也直接导致地面建筑地下部分不断增加,随之而来的是基坑越来越宽,越来越深,这对开挖分层、深基坑支护技术提出了考验。本文结合具有代表性的大型工程地下厂房开挖技术实践为例从开挖程序、支护方式及时机以及后续的安全检测等方面进行了进行了阐述,结果反馈,所采取的施工技术和方案很好地达到了预期目的,面临的围岩变形误差总的得到控制,工程对大型地下工程施工具有一定的示范意义。 To the underground space has become the mainstream of modern urban land, especially large-scale building planning and development, which also led directly to the underground part of the ground building continues to increase, followed by the foundation pit is wider and deeper and deeper, which open Dig stratification, deep foundation pit support technology put forward the test. Based on the practice of excavation technology of large-scale underground powerhouse project, the paper expounds the excavation procedures, support methods and timing as well as the subsequent safety inspection. The feedback, the construction technology and the scheme adopted are very important Well to achieve the intended purpose, facing the total deformation of surrounding rock to be controlled, the project of large-scale underground construction has some exemplary significance.