某深基坑支护监测与数值模拟研究

Research on Monitoring and Numerical Simulation of Deep Foundation Pit Support

摘要: 在基坑施工过程中，围护结构的变形监测对确保施工安全和保护周边环境具有重要意义。郑州中心城区某深基坑为研究对象，结合当地地质和发展情况，对围护结构的变形和周围建筑物的沉降进行监测和分析。同时运用有限元软件Midas GTS/NX进行数值模拟，对不同开挖工况进行分析，并与多项监测数据进行对比。研究表明，通过对比模拟值和实测值监测结果和模拟结果均未超过规范允许值且在变化规律上基本保持一致。深层水平位移曲线呈现为明显的“头大脚小”的形状，为类似条件的基坑工程积累了宝贵的经验。

Abstract: During the foundation pit construction process, the deformation monitoring of the retaining structure is of great significance for ensuring construction safety and protecting the surrounding environment. A certain deep foundation pit in the central urban area of Zhengzhou was taken as the research object. Combined with the local geology and development conditions, the deformation of the retaining structure and the settlement of the surrounding buildings were monitored and analyzed. Meanwhile, the finite element software Midas GTS/NX was used for numerical simulation to analyze different excavation conditions and compare them with multiple monitoring data. Studies show that by comparing the simulated values with the measured values, both the monitoring results and the simulated results have not exceeded the allowable values specified in the norms and are basically consistent in the variation patterns. The deep horizontal displacement curve presents a distinct shape of “head large foot small”, which has accumulated valuable experience for foundation pit projects under similar conditions.