基坑开挖对周边环境的影响

为了更深入地研究深基坑开挖对周边环境的影响，运用Midas GTS/NX软件对长春某深基坑工程开挖过程中周边建筑物进行了模拟，并与现场监测结果进行对比分析，探讨了周边环境的变化规律。结果表明：深基坑开挖会引起围护结构产生朝向基坑内的水平位移，位移最大值为10.8 mm，与实际监测数据7.9 mm相差了2.9 mm，计算结果与实测结果在误差许可范围内基本吻合；对于浅基础建筑物，在距离基坑0.6H~0.8H（H为基坑开挖深度）处建筑物沉降和地表沉降差异较大，建筑物表现为不均匀沉降。

Influence of Excavation of a Deep Excavation on the Surrounding Environment

In order to study the influence of deep foundation pit excavation on the surrounding environment, the excavation process of a deep foundation pit in Changchun was numerically simulated for its effect on the surrounding buildings by using Midas GTS/NX software. Compared with the on-site monitoring records, the changes of the surrounding environment were discussed. The results show that the calculated results are basically consistent with the measured results; the deep foundation pit excavation caused a displacement of the enclosure structure towards the foundation pit, and the maximum displacement is 10.8 mm, 2.9 mm larger than that of the actual monitoring data of 7.9 mm; for the shallow foundation in the buildings, the settlement and surface settlement of the buildings are different from those of a foundation pit at 0.6H-0.8H (excavation depth of foundation pit), and the building settlement is uneven.