Abstract
Baixugong tunnel is a big karst tunnel in Qing-Lian highway, and the construction environment is complexity. The structure of pile-pile cap-supporting wall-connection beam is used to treat the karst cave tunnel. Using simulation results and monitoring data to reveal the influence of tunnel excavation to treatment structure. The treatment structure in the karst tunnel is safe and reliable. The supporting wall stress and pile strain all increase accelerating during the advance of excavation face, then stabilize gradually. The construction simulation results are similar with the monitoring data, which demonstrates the important role of treatment structure in the karst tunnel.
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