中山大学学报（自然科学版）（中英文）2025，Vol.64Issue(3)：139-147,9.DOI:10.13471/j.cnki.acta.snus.ZR20240264
长江一级阶地软土地层HSS模型参数的敏感性分析及反演
Sensitivity analysis and inversion of HSS model parameters for soft soil layers on the first terrace of the Yangtze River
摘要
Abstract
Based on a deep foundation pit project in Wuhan,we establishe a numerical model using the PLAXIS 2D,analyze the sensitivity of HSS model parameters for cohesive and sandy soils,evaluate the sensitivity of soft soil layers in the first terrace of the Yangtze River,and invert the significantly sensitive parameters.Firstly,the sensitivity analysis of certain parameters of the HSS model for cohesive and sandy soils is conducted,focusing on the parameters that most significantly affect the settlement of the tunnel crown.Then,the sensitivity analysis of the soft soil layers in the first terrace of the Yangtze River is carried out to determine the soil mechanical parameters to be inverted.Finally,combining the existing tunnel crown settlement monitoring data,the inversion of the soil mechanical parameters to be inverted is conducted using a deterministic forward-inverse method.The results show that for both cohesive and sandy soils,the parameter that most significantly affects the tunnel crown settlement is the small-strain reference initial shear modulus(Gref0).In the soft soil layers of the first terrace of the Yangtze River,the layers that significantly affect the deformation of the existing tunnel are the silty fine sand layer and the fine sand layer.The inverted Gref0 values for the silty fine sand layer and the fine sand layer are 90 MPa and 120 MPa,respectively.关键词
HSS模型/深基坑工程/数值模拟/参数/敏感性分析/反演Key words
HSS model/deep excavation engineering/numerical simulation/parameter/sensitivity analysis/inversion分类
建筑与水利引用本文复制引用
孟超,高志华,黄珏皓,柴少波,刘帅,孙雪兵..长江一级阶地软土地层HSS模型参数的敏感性分析及反演[J].中山大学学报（自然科学版）（中英文）,2025,64(3):139-147,9.基金项目
国家自然科学基金(51909259) （51909259）
