V形河谷深厚回填土大直径灌注桩施工控制

Construction control of large-diameter cast-in-place piles with deep and thick backfill in V-shaped valley

桩基作为基础工程直接决定桥梁结构的稳定性和寿命。文章基于在重庆渝北区人工填土区域进行桥梁桩基施工,以双桥路道路工程为例,结合桩基施工的安全、适用、经济的理念,对松散人工填土地质条件下桩基础成孔形式、塌孔处理措施及工艺方法等进行了探讨。对双桥路混凝土灌注桩施工采用旋挖钻及塌孔处理办法进行了阐述,可为类似项目的施工提供参考。

As a basic project,pile foundations directly determine the stability and service life of bridge structure.Based on the construction of bridge pile foundations in the artificial fill area in Yubei District,Chongqing,taking the Shuangqiao Road road project as an example,combined with the concepts of safety,applicability and economy of pile foundation construction,the hole formation,hole collapse treatment measures and technological methods of pile foundation under the geological condition of loose artificial filling soil were discussed.The paper expounds the treatment methods of rotary drilling and hole collapse in the construction of concrete cast-in-place piles on Shuangqiao Road,which provide a reference for the construction of similar projects.