岩土工程学报2025，Vol.47Issue(2)：284-295,12.DOI:10.11779/CJGE20230919
基于UH模型的盾构隧道非线性地基反力确定方法
Method for determining nonlinear foundation reaction of shield tunnels based on the UH model
摘要
Abstract
To accurately capture its nonlinear characteristics under surcharge,an approach for the subgrade reaction of shield tunnels is implemented on the basis of the soil strength design method(MSD method)and the unified hardening model(UH model).The practical simplified version is proposed by conducting the description of the mechanical properties of the entire soil zone with constitutive curves of soils at the height of tunnel center.Furthermore,using the statistically derived UH constitutive parameters for soil layers ④ and ⑤1 in Shanghai,the subgrade reactions for both soil layers are predicted and fitted by using the hyperbolic curve function.After the secondary fitting process is conducted to obtain the initial stiffness and the ultimate strength in relation to the parameters of the constitutive model,the functions for subgrade reactions of shield tunnels in Shanghai are established.Eventually,the multifactorial evaluation of shield tunnels in Shanghai under surcharge conditions is performed,confirming the capacity of the developed formulas for predicting the large deformation of tunnels under surcharge.The convergence deformation of the tunnels under surcharge is more sensitive to the initial stiffness of subgrade reactions,governed by various soil parameters such as κ/λ and confining pressure,than to its ultimate strength.关键词
地基反力曲线/UH模型/MSD方法/堆载/地铁隧道Key words
subgrade reaction curve/UH model/MSD method/surcharge/metro tunnel分类
建筑与水利引用本文复制引用
梁发云,魏圣明,陈可,袁强,闫静雅,顾晓强..基于UH模型的盾构隧道非线性地基反力确定方法[J].岩土工程学报,2025,47(2):284-295,12.基金项目
上海市优秀技术带头人计划项目(21XD1430900) （21XD1430900）
