小应变硬化（hardening soil-small, HSS）模型在模拟预测软土地层盾构隧道施工引起周边地层变形方面具有显著优势，但该模型中的计算参数多，难以确保下穿不同类型建筑物时模拟的准确度。基于地层和建筑物变形现场实测数据，建立盾构隧道-周边建筑群一体化实时反馈三维数值模型，根据未下穿建筑物试验段的数值模型和地表沉降实测值，反演得到一套适用于当地土层的HSS模型修正参数，在该HSS模型基础上，针对下穿建筑物预测段，基于建筑测点实测值、地表沉降实测值、盾构顶进技术参数调整等信息，对建筑基础参数、土体模型参数、盾构模型参数进行二次修正，通过苏州地铁S1号线盾构区间工程实例验证了工程适用性。研究表明： 1) 对于直径6 m的圆形盾构掘进，引起软土地层地表及周边建筑物的主要沉降变形影响范围在掌子面沿掘进方向50环与掘进反方向35环区间内。2)由于存在早期注浆加固等施工措施，建筑物基础实测沉降量一般小于模拟值，也小于邻近地表变形量。3)盾构左右线依次掘进对周边环境影响的主要风险在于先掘进的左线隧道，而后掘进的右线隧道产生的变形量明显偏小，这在力学机制上与地应力的初次和二次释放有关，右线隧道模拟和实测沉降量为左线的0.5~0.7倍。

The hardening soilsmall (HSS) model has significant advantages in simulating and predicting the deformation of surrounding strata induced by shield construction in a soft soil layer. However, several calculation parameters are in the model, which cannot accurately ensure the simulation results when crossing underneath multiple buildings. Based on the field measured stratum and building deformation data, a threedimensional numerical model of shield tunnelsurrounding building group integration realtime feedback is developed. Next, through the numerical model of the test section where the shield does not cross underneath buildings and the measured values of ground settlement, a set of HSS model correction parameters suited for local soil layers is obtained by inversion. Finally, based on the HSS model, the parameters of the building foundation, soil model, and shield model are modified according to the measured values of building points, surface settlement, and the adjustment of technical parameters of shield advancing. The engineering applicability is validated in the Suzhou metro line S1 shield section project, and the results show the following: (1) For the tunneling of a circular shield with a diameter of 6 m, the principal subsidence deformation of the surface of the soft soil layer and adjacent buildings is affected by the tunnel face along the range of the excavation direction of 50 rings and the opposite excavation direction of 35 rings. (2) Due to the construction methods such as early grouting reinforcement, the measured settlement of the building foundation is generally smaller than the calculated value and the deformation of the adjacent surface. (3) The main risk lies in the first excavated left tunnel, and the deformation of the later excavated right tunnel is minor in terms of mechanical mechanism and related to the primary and secondary release of ground stress. The simulated and measured settlement of the first excavated right line tunnel is 0.5 ~ 0.7 times that of the left line tunnel.