Influence of New Energy Materials on Dynamic Interaction between Surrounding Rock and Structure of Heavy‐Duty Railway in Small Clearance Crossing Tunnel

In the rapid development of urban traffic, the small clearance interchange tunnel has always been a difficult problem for heavy‐duty railways, so special requirements are also put forward for materials. Bainite steel with excellent comprehensive mechanical properties is considered to replace traditional high manganese, the best material for steel. This article first improves the process of the material and analyzes the structural dynamics of the material through different isothermal cooling to analyze the different performances of the material on the heavy‐duty railway. Using traditional theoretical data analysis, theoretical data calculation, numerical analysis simulation, and on‐site engineering monitoring technical means is to complement the construction of the soft rock underground tunnel in the subway section at the intersection of the small clear distance line to the existing surrounding rock tunnel wall in the section. The degree of deformation affects the change law, and the related technical issues of engineering control are analyzed. Finally, the control measures of full‐face grouting reinforcement with steel flower pipes and the final construction plan of constructing the left line, right line, and undercut section in sequence are proposed. FLAC numerical simulation software was used to complete the feasibility evaluation of the control measures for the deformation of the ground and lining induced by the construction of the cross tunnel. The results show that the maximum deformation of the ground surface is reduced by 35.4% compared with no control measures, and the longitudinal deformation range of the ground surface and the vault is reduced by 28.9%.