Construction monitoring measurement technology and challenges of Bayingou Tunnel
XIAO Chengshuai
LU Faliang
Abstract：To accurately monitor the dynamic response of surrounding rock and support structures during tunnel construction and early operation phases,promptly identify potential instability risks,validate design rationality,and guide safe construction practices,systematic and high-precision on-site monitoring methods are implemented.Total station instruments are employed for continuous non-contact measurement of tunnel crown settlement,surrounding convergence,and surface settlement to precisely capture spatial deformation.Combined with geophysical radar for early detection of adverse geological formations ahead,automated data acquisition systems and specialized analysis software enable real-time transmission,processing,visualization,and early warning analysis of massive monitoring data.Post-excavation monitoring data indicate that the deformation of the surrounding rock after tunnel excavation follows a three-stage change pattern,transitioning from rapid change to slow change and finally to basic stability as construction progresses.This validates the applicability of the designed support parameters in most sections,but indicates insufficient support strength in specific weak surrounding rock sections.To address challenges including vulnerable monitoring points,significant construction interference,and humid dust environments,measures such as reinforcing protection points,optimizing workflows to reduce interference,selecting environment-resistant equipment,and enhancing calibration are adopted.A real-time monitoring system is established for dynamic analysis and early warning,ensuring data reliability and guiding construction safety.
Keywords：tunnel engineeringmonitorvault settlementperipheral convergencesurface settlement
Publication Date：2026-01-31
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 63-72 )