Research on Application of Screw Pile Quality Detection Technology in High-Speed Railway
The screw pile is a kind of irregular pile with the combination of the straight bar and the spiral section.The soil around the pile is compressed and encrypted by the screw thread,and part of the soil around the pile forms the screw thread,the bearing capacity of screw pile under compression and pull-out is improved remarkably.The screw pile has the advantages of simple construction technology,low cost,strong bearing capacity and good environmental protection effect,and are widely used in the treatment of high-speed railway subgrade foundation.Through the research and summary of the quality inspection technology for screw piles in roadbed engineering,it is proposed that the use of low strain reflection wave method will have a certain impact on the identification results due to complex factors such as the boundary between the straight and spiral sections,and changes in the section of the pile below the spiral section.On site testing should be based on the results of low strain testing,and core testing,excavation verification,and static load testing should be added to piles with objections.At the same time,the quality control measures are put forward before,during and after the screw pile testing,so as to ensure the overall quality and safety of the project.
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