the construction technology of the auxiliary tunnel is complex,the construction is difficult,and the construction safety risk is prominent,it is the main difficulty in tunnel construction.In this paper,the authors propose the construction scheme of small pilot tunnel and arch-frame lock-in method in connection with the roof-lifting construction of the main tunnel of the inclined shaft of the East Qilian Mountains Tunnel,and establish a three-dimensional model using BIM technology,to realize the technical process simulation and visualization of the top-lifting construction of the main entrance of the Auxiliary Tunnel,BIM technology is used to simulate the processing size of the lock-in steel frame in advance,so as to ensure the roundness of the cross-section at the site intersection,to achieve high-efficient and safe construction of the auxiliary tunnel into the main tunnel,the construction of the auxiliary tunnel successfully solved the difficulties,achieved the expected goal,can provide a reference for similar engineering construction.
tunnel constructionBIM technologyauxiliary tunnelinclined shaftjacking construction
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