Slope Deformation Monitoring of Railroad Bridge in Mountainous Area Adjacent to a Landslide
Under the influence of continuous movement of creep-slip type landslides,there will be a large safety hazard in the regional project.In order to solve the problem of the lack of long-term deformation monitoring data on the slope of Jinzhulin No.1 Bridge of the Neijiang-Liupanshui Railway,which cannot reflect the actual movement characteristics of the landslide,the traditional manual measurement method,combined with the deep horizontal displacement data,was used to obtain the deformation monitoring data of the bridge slope from 2015 to 2023 and to analyze the potential destabilizing factors of the slope.The monitoring results show that,there are obvious differences in the spatial distribution and deformation magnitude of the bridge slope deformation,with the average annual deformation rate of the stabilized point at the trailing edge of the landslide being about 5 mm/a,the average annual deformation rate of the monitoring point in the middle is about 20 mm/a,and that of the destabilized point at the leading edge is about 50 mm/a,the landslide body is still in the incubation stage.The results show that the bedrock in the deep part of the slope body does not show obvious deformation,and the slope body is still dominated by the long-period shallow surface creep-slip action,and the motion trend is nearly linear with the monitoring curve does not show obvious deformation acceleration time.The slope destabilization factors are related to the regional geological background,external concentrated rainfall,hydrological factors and human activities,and it is necessary to lay anti-slip piles and other slope stabilization measures in time to reduce the man-made external interventions,such as excavation at the bottom of the slope.
mountain railwayNeijiang-Liupanshui Railwaybridge slopedeformation monitoringpotential instability factorsdisaster prevention and mitigation
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