In tunnel construction,it is sometimes necessary to cross the fracture zone,especially when the fracture zone is wide and steep and contains abundant ground water,which becomes a great technical challenge.After exca-vation,large deformation may occur,threatening the stability of surrounding rock and the safety of workers.Aiming at the engineering practice of a highway tunnel crossing the water-rich fracture zone,a three-dimensional model of the tunnel and the water-rich fracture zone was constructed by using abaqus software and numerical simulation method.The deformation behavior of the surrounding rock before and after grouting was simulated,including the settlement of the vault,the uplift of the arch bottom and the horizontal displacement of the arch waist.In order to verify the effectiveness of grouting on the deformation control of surrounding rock,the field monitoring data and nu-merical simulation results were compared.The results show that the grouting treatment significantly reduces the hor-izontal and vertical displacements of the surrounding rock,makes the deformation of the surrounding rock more moderate,and effectively improves the stability of the surrounding rock.
关键词
公路隧道/富水破碎带/三维模型/变形控制
Key words
highway tunnel/water-rich fracture zone/3D model/deformation control
维普
万方数据