【摘要】 依据太原市地铁2号线王村南街站基坑的监测数据，结合当地典型的地质条件、施工工艺及环境影响等因素，对支撑轴力、基坑水平位移以及坑边地表沉降规律进行研究，同时采用MIDAS GTS NX进行基坑开挖的数值模拟分析。研究结果表明，基坑开挖过程中，由于施工方法及现场堆载等因素造成基坑两侧处受荷载不对称时，所受荷载大的一侧，通过钢支撑传导的土压力会导致另一侧基坑的支护桩浅部向基坑外偏移；支撑轴力受土体以及相邻支撑影响而产生波动；基坑周围的地表沉降曲线随着距坑边距离与基坑深度比值的增大先增后降，呈现出“勺”形，周围建筑物导致基坑开挖对坑边地表沉降的影响范围扩大，从而使得最大沉降向远处偏移。更多还原

【Abstract】 Based on the monitoring data of the foundation excavation of Wangcun Nanjie Station of Taiyuan Metro Line 2, combined with the typical geological conditions, construction technology, and environmental impact, the axial force of the support, the horizontal displacement of the foundation excavation, and the surface settlement law of the pit edge are studied. Meanwhile, MIDAS GTS NX is used for numerical simulation analysis of foundation excavation. The results indicate that during the excavation of the foundation excavation, when the load on both sides of the foundation excavation is asymmetric due to factors such as construction methods and on-site stacking, the earth pressure transmitted through the steel support on the side with a large load will cause the shallow part of the supporting pile on the other side of the foundation excavation to move outward. The support axial force fluctuates due to the influence of soil and adjacent support. The surface settlement curve around the foundation excavation increases first and then decreases with the increase in the ratio of the distance from the pit edge to the depth of the foundation excavation, showing a “spoon” shape. The surrounding buildings lead to the expansion of the influence range of the foundation excavation on the surface settlement of the pit edge, thus making the maximum settlement shift to the distance.更多还原