不良地质条件下桥梁管桩抗震关键技术研究

Research on Key Seismic Technology of Bridge Pipe Piles with Unfavorable Geological Conditions

摘要:

预制管桩具有承载力高、质量可靠、绿色环保、经济性高等优点，目前被广泛应用于建筑工程中。相对而言，管桩在公路桥梁领域的应用较少，尚处于推广应用阶段，不良地质条件下大直径管桩的抗震性能往往成为设计的重难点。以某高速公路项目为例，研究预制管桩在不良地质条件下的动力响应，通过采取减隔震设计、选取合适管桩型号等措施，提高结构安全储备。研究结果可为同类工程应用提供借鉴参考。

Abstract:

The prefabricated pipe piles have the advantages of high bearing capacity, reliable quality, environmental protection and high economy, and are widely used in the constructional engineering. Relatively speaking, the application of pipe piles in the field of highway bridges is less, and it is still in the stage of popularization and application. The seismic performance of large-diameter pipe piles with unfavorable geological conditions is often a major difficulty in design. Taking an expressway project as an example, the dynamic response of prefabricated pipe piles with unfavorable geological conditions is studied. The structural safety reserve is improved by taking the measures of seismic isolation design and selecting the appropriate pipe pile types. The results provide the reference for similar engineering applications.