Research on the Key Problems of Anti-slide Pile Design Under the Condition of Buried Pipeline Crossing Landslide
Landslide is one of the main types of geological hazards that threaten the operation safety of long oil and gas pipelines,and the most serious threat to pipelines is that pipelines laid perpendicular to the main sliding direction of landslides(transverse slope laying).Under the condition of transverse slope laying,the pipeline will bend and deform under the action of landslide thrust,and the boundary and middle part of landslide are the most vulnerable parts of buried pipeline.The bending moment of buried pipeline at the landslide boundary are the largest,the deflection of the buried pipeline in the middle of the landslide is the largest,the compressive stress of the pipe wall in the middle of the landslide is the largest,and the tensile stress of the pipe wall in the middle of the landslide is the largest.Under long-term stress,the pipe body is prone to plastic tensile crack,weld cracking or compressive yield failure.When the anti-slide pile is used to control the landslide under the condition of transverse slope laying,the stability of the landslide should be ensured,and the deformation degree of the landslide itself and the passive reinforcement property of the anti-slide pile should be fully considered.Therefore,if the anti-slide pile is used to control the pipeline crossing the landslide,the key issues such as the location of the anti-slide pile,the selection of design parameters and the auxiliary engineering measures should be considered.
landslideoil and gas pipelineslaying across slopeslide-resistant pile
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