Research on Collaborative Deformation of Goaf Surface and Structure Based on Multi-Source Monitoring Data
After the formation of mined-out areas,various degrees of surface subsidence deformations occur,often manifesting as uneven surface deformations,which pose a significant threat to the safety of high-speed rail structures.To investigate the characteristics of ground subsidence induced by mined-out areas and elucidate the coupling relationship between surface deformations and on-site structures,we took the Luran High-speed Rail as a case study.We employed methods such as groundwater level monitoring,deep-seated settlement monitoring,surface elevation measurements,automated surveillance,InSAR monitoring,and others to collect data on groundwater level changes,surface subsidence,and structural deformations during the same time period.We analyzed the correlation between groundwater level fluctuations and surface subsidence and summarized the relationship between surface deformations and structural deformations.Key findings:In the DK277 section,shallow surface subsidence is primarily driven by fluctuations in groundwater levels and exhibits a noticeable correlation with roadbed structural deformations.In the DK372 section,subsidence is predominantly concentrated within an 80-meter range,and ground subsidence has minimal impact on bridge structural deformations due to the effective mitigation measures provided by pile foundations.These research findings can serve as a valuable reference for similar projects.
NETL
NSTL
万方数据
维普
