In this paper,the numerical simulation and data analysis of the influence of step method,CRD method and double sidewall guided pit method on the stress and deformation of surrounding rock during tunnel construction are carried out.The results show that the disturbance of step method is small in the initial stage,but the stress concentration deformation increases in the later stage.CRD method has large uplift settlement and uneven stress concentration in the early stage of excavation.The deformation of double sidewall guided pit method is controlled well in the early stage,and the deformation increases in the later stage.
关键词
台阶法/CRD法/双侧壁导坑法/变形控制
Key words
step method/CRD method/double sidewall guide pit method/deformation control
维普
万方数据