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Effects Assessment of Emergency Treatment Project of Qinshui CBM Pipeline Landslide
The filled embankment of interoperability joints on Yang-Yi Highway in Qinshui slipped on September 30, 2011. It resulted in cut-off drains and culverts of the damaged highway and ruptured CBM pipeline. To curb deformation of landslide that may intensify to harm the pipe further as soon as possible, emergency reinforcements of prestressed anchor cable frame have been constructed, which is located on both sides of pipelines on lower slope of the Yang-Yi highway and the old highway. Using the FLAC3D procedures to establish landslide numerical model, then the sliding surface is dispersed by contact element and obtained by calculating the three-dimensional stress state on Interface node. The author defines the point safety factor on Interface as the ratio of the shear strength of the node to the sliding force. The mechanism deformation and reinforcement is analyzed through the point of the distribution characteristics of the safety factor. The research indicates that the distribution of point safety factor on Interface shows the same regularity as the landslide macroscopic deformation and the reinforcing effect reflected by on-site monitoring data. As a result, point safety factor on Interface can be taken as a quantitative assessment index of treatment project of landslides.
Effects Assessment of Emergency Treatment Project of Qinshui CBM Pipeline Landslide
The filled embankment of interoperability joints on Yang-Yi Highway in Qinshui slipped on September 30, 2011. It resulted in cut-off drains and culverts of the damaged highway and ruptured CBM pipeline. To curb deformation of landslide that may intensify to harm the pipe further as soon as possible, emergency reinforcements of prestressed anchor cable frame have been constructed, which is located on both sides of pipelines on lower slope of the Yang-Yi highway and the old highway. Using the FLAC3D procedures to establish landslide numerical model, then the sliding surface is dispersed by contact element and obtained by calculating the three-dimensional stress state on Interface node. The author defines the point safety factor on Interface as the ratio of the shear strength of the node to the sliding force. The mechanism deformation and reinforcement is analyzed through the point of the distribution characteristics of the safety factor. The research indicates that the distribution of point safety factor on Interface shows the same regularity as the landslide macroscopic deformation and the reinforcing effect reflected by on-site monitoring data. As a result, point safety factor on Interface can be taken as a quantitative assessment index of treatment project of landslides.
Effects Assessment of Emergency Treatment Project of Qinshui CBM Pipeline Landslide
Wu, Honggang (author) / Yang, Tao (author) / Fang, Jiansheng (author) / Zhang, Hongli (author)
International Conference on Pipelines and Trenchless Technology ; 2012 ; Wuhan, China
ICPTT 2012 ; 8-19
2012-11-13
Conference paper
Electronic Resource
English
Assessment , Risk management , Inspection , Landslides , Infrastructure , Corrosion , Leakage , Installation , Rehabilitation , Safety , Pipelines , Monitoring
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