复杂环境软土地层盾构隧道推进实时动态仿真及变形预测研究——以苏州地铁S1号线盾构区间为例

doi:10.3973/j.issn.2096-4498.2022.12.006

隧道建设（中英文） ›› 2022, Vol. 42 ›› Issue (12): 2024-2035.DOI: 10.3973/j.issn.2096-4498.2022.12.006

复杂环境软土地层盾构隧道推进实时动态仿真及变形预测研究——以苏州地铁S1号线盾构区间为例

邓声君1， 2，何杨1，陈浩林1，周峰1， *，朱锐1，师文豪3，王源3，马千里4

（1. 南京工业大学地下工程系, 江苏南京 211816; 2. 浙江大学滨海和城市岩土工程研究中心，浙江杭州 310058; 3. 苏州科技大学土木工程学院, 江苏苏州 215011; 4. 北京建工集团有限责任公司，北京 100032）

出版日期:2022-12-20 发布日期:2023-01-09
作者简介:邓声君（1987—），男，江苏宜兴人，2018年毕业于同济大学，土木工程专业，博士，讲师，主要从事隧道与地下工程、人工地层冻结领域的教学与科研工作。Email： sjdeng@njtech.edu.cn。*通信作者：周峰， Email： zhoufeng@njtech.edu.cn。

RealTime Dynamic Simulation and Deformation Prediction of Shield Tunneling through Soft Soil Layer in Complex Environment: 
a Case Study of Suzhou Metro Line S1 Shield Section

DENG Shengjun1, 2, HE Yang1, CHEN Haolin1, ZHOU Feng1, *, ZHU Rui1, SHI Wenhao3, WANG Yuan3, MA Qianli4

(1.Department of Underground Engineering,Nanjing Tech University,Nanjing 211816,Jiangsu,China;2.Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China;3.School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,Jiangsu,China;4.Beijing Construction Engineering Group,Beijing 100032,China)

Online:2022-12-20 Published:2023-01-09

摘要/Abstract

摘要： 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。

关键词:

小应变硬化模型, 盾构隧道, 数值模拟, 地表沉降, 建筑物沉降

Abstract:

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.

Key words: hardening soilsmall model, shield tunnel; numerical simulation, ground subsidence, building subsidence

邓声君, 何杨, 陈浩林, 周峰, 朱锐, 师文豪, 王源, 马千里.

复杂环境软土地层盾构隧道推进实时动态仿真及变形预测研究——以苏州地铁S1号线盾构区间为例 [J]. 隧道建设, 2022, 42(12): 2024-2035.

DENG Shengjun, HE Yang, CHEN Haolin, ZHOU Feng, ZHU Rui, SHI Wenhao, WANG Yuan, MA Qianli.

RealTime Dynamic Simulation and Deformation Prediction of Shield Tunneling through Soft Soil Layer in Complex Environment: 

a Case Study of Suzhou Metro Line S1 Shield Section[J]. Tunnel Construction, 2022, 42(12): 2024-2035.

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复杂环境软土地层盾构隧道推进实时动态仿真及变形预测研究——以苏州地铁S1号线盾构区间为例

RealTime Dynamic Simulation and Deformation Prediction of Shield Tunneling through Soft Soil Layer in Complex Environment: 
a Case Study of Suzhou Metro Line S1 Shield Section

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