Study on He bolt (cable) Support in Soft Rock Tunnels Based on ABAQUS
DOI:
https://doi.org/10.54097/qa4t6n77Keywords:
ABAQUS; unit deletion algorithm; Mohr-Coulomb; He bolt (cable).Abstract
A certain tunnel has a surrounding rock classification of Grade V, characterized by poor integrity and significant settlement deformation. Therefore, using high-strength, high-performance support bolt (cable) is an important measure to enhance the stability of the tunnel. Based on this, this paper employs ABAQUS software, combined with a unit deletion algorithm and Mohr-Coulomb yield criterion, to study the supporting effect of He bolt (cable) in soft rock tunnels. The research results indicate that He bolt (cable) support can effectively reduce horizontal and vertical displacements at the arch foot and arch bottom during the tunnel excavation process, thereby enhancing the stability of the surrounding rock. Furthermore, He bolt (cable) have a significant impact on controlling stress concentration in the surrounding rock and suppressing deformation, providing a theoretical basis and technical reference for the support design of soft rock tunnels.
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