基于三维有限元模拟的高铁隧道施工力学行为研究  

Study on mechanical behavior of high-speed railway tunnel construction based on three-dimensional finite element simulation

作　　者：李晨光 LI Chenguang(China Railway 18th Bureau Group 3rd Engineering Co.,Ltd.,Zhuozhou 072750,China)

机构地区：[1]中铁十八局集团第三工程有限公司,河北涿州072750

出　　处：《混凝土与水泥制品》2025年第3期81-85,共5页China Concrete and Cement Products

摘　　要：依托成达万高铁隧道工程,采用ABAQUS软件模拟了隧道中岩体的力学行为,评估了梯度增强塑性损伤岩石模型的力学性能,并与常用线性弹塑性岩石模型的力学性能进行了对比。结果表明:梯度增强塑性损伤岩石模型中的主要应力状态的强重分布和岩体软化现象会导致隧道附近岩体损伤,与常用线性弹塑性岩石模型相比,喷射混凝土壳体变形更大,承受的荷载更高;梯度增强塑性损伤岩石模型在预测横截面局部剪切带方面更具优势。Based on the tunnel project of the Chengdu-Dazhou-Wanzhou high-speed railway,the mechanical behavior of the rock mass in the tunnel was simulated using ABAQUS software.The mechanical properties of the gradient enhanced plastic damage rock model were evaluated and compared with those of commonly used linear elastoplastic rock model.The results indicate that the strong and heavy distribution of the main stress states and the softening phenomenon of the rock mass in the gradient enhanced plastic damage rock model can cause damage to the rock mass near the tunnel.Compared with commonly used linear elastoplastic rock model,the sprayed concrete shell undergoes greater deformation and bears higher loads.The gradient enhanced plastic damage rock model has more advantages in predicting local shear bands in cross-sections.

关 键 词：三维有限元模拟 梯度增强塑性损伤岩石模型 高铁隧道 喷射混凝土 力学行为 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]