Analysis of Force and Deformation Characteristics of Different Construction Techniques for Two-lane Tunnels with Very Large Cross-sections
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.
step methodCRD methoddouble sidewall guide pit methoddeformation control
万方数据
维普
