In view of the shortcomings and shortcomings of the present stress release situation of the tunnel in soft rock with high geostress, a new advanced stress release method is put forward, which adopts the mechanical vibration exciter to pretreat the rock mass, the stress releasing beyond the time limit is completed, which is beneficial to reduce the deformation of the lining after the tunnel excavation is completed. In view of TBM driving technology, referring to the existing shaft and roadway resonant driving technology, adopting a new equipment suitable for TBM driving system, according to the technology of the new equipment and mode of action, the process of excitation is simulated and analyzed, and the correlation between the frequency, amplitude and depth of excitation and stress release is studied, the frequency, amplitude and depth which are most favorable for stress release are obtained, and the validity of this combination is further verified by the tunnel deformation results obtained from the following tunnel excavation, it provides a reference basis for the subsequent practical application of this method.
Key words
soft rock /
mechanical vibration /
high geostress /
advance stress relief /
FLAC3D
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