【摘要】 某深基坑工程位于深圳市前海地区，基坑开挖深度大，临海地区水文地质条件复杂，紧邻基坑东侧有3条正在运行的地铁线路，地下水变动对周边影响较大。该文通过数值模拟手段，分析了该基坑现有支护及止水方案的适用性和可靠性，研究了该基坑工程开挖引起的渗流场变化及对周边环境的影响，结合实际监测数据表明，该工程采用“地下连续墙+环形内支撑”支护方案后开挖对周边的环境影响在可控范围内，数值分析结果与实测结果较为吻合，可为同类工程分析提供借鉴。更多还原

【Abstract】 A deep foundation pit project is located in the Qianhai area of Shenzhen City. The excavation depth of the foundation pit is large, and the hydrogeological conditions in the coastal area are complex. There are 3 subway lines running on the east side of the foundation pit, and the fluctuation of groundwater has a great impact on the surrounding area. By means of numerical simulation, this paper analyzes the applicability and reliability of the existing support and water-stop scheme of the foundation pit, and studies the change of the seepage field caused by the excavation of the foundation pit and its influence on the surrounding environment. Combined with the actual monitoring data It shows that the project adopts the support scheme of “underground diaphragm wall+annular inner support”, and the impact of excavation on the surrounding environment is within a controllable range. The numerical analysis results are in good agreement with the measured results, which can provide reference for the analysis of similar projects.更多还原