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软土基坑工程的“时空效应”是近年来基坑工程研究和实践的重大创新成果,而“空间效应”则是“时空效应”的重要组成部分。随着开挖深度和面积的急剧增大,软土深基坑工程的“空间效应”愈加显著,基坑变形控制和周边环境保护愈加困难。通过紧邻地铁超深基坑工程施工的实例分析,介绍了“空间效应”原理在软土深基坑工程中的应用,取得了很好的变形控制效果,保证了临近运营地铁的安全,对类似软土深基坑工程具有一定的指导意义。
The “space-time effect” of soft soil foundation engineering is a significant innovation in the research and practice of foundation pit engineering in recent years, and “space effect” is an important part of “space-time effect”. With the rapid increase of excavation depth and area, the “space effect” of deep foundation pit engineering in soft soil becomes more and more significant, so it is more difficult to control the deformation of the foundation pit and the surrounding environment. The application of the principle of “space effect” in deep foundation pit engineering in soft soil is introduced through the example analysis of the project of super deep foundation pit construction next to metro. The effect of deformation control is well achieved and the safety of the subway nearby is ensured. It is of guiding significance to similar soft soil deep foundation pit project.