Processing method for bridge pile foundation karst cave: Fid-Bau Portal

Processing method for bridge pile foundation karst cave

ZHU ZHONGQUAN / SONG JIANJUN

The invention discloses a processing method for a bridge pile foundation karst cave. The processing method is characterized by comprising a pile side friction force part and a pile end bearing force part, wherein pile length is reduced to the greatest extent by utilizing a way of increasing a pile diameter of a non-karst-cave stratum area and increasing a surface area to improve pile side frictionforce, so that a pile end is guaranteed to be positioned above a large karst cave, and therefore, the problem of a conventional large karst cave processing method for a bridge pile foundation is solved, construction investment is reduced, construction progress is guaranteed, complex process and uncertainty of constructing the pile foundation in the karst cave are avoided, and pile side friction resistance guarantees maximum vertical force in an operation process.

本发明公开了一种桥梁桩基溶洞的处理方法，包括桩侧摩阻力部和桩端承载力部，通过增加非溶洞地层区域的桩径，利用增大表面积提高桩侧摩阻力的方式，尽量减小桩长，保证桩端位于大型溶洞以上，解决了桥梁桩基常规大型溶洞处理方法的难题，减少了施工投入的同时，也保证了施工进度，避免了在溶洞内施工桩基的复杂工艺与不确定性，桩侧摩阻力保证运营过程中承受的最大竖向力。

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