套管法在桥梁灌注桩桩头破除施工中的应用

Application of Casing Pipe Method in the Construction of Removing Pile Heads of Cast-in-place Piles for Bridges

摘要:

灌注桩是水利工程跨河桥梁进行基础处理的一种施工工艺。该工艺可以有效为桥梁提供坚实的基础，但桩头破除的传统施工方法是人工采用风镐进行凿出桩顶高程以上部分混凝土，露出预留锚固钢筋。该方法不仅施工难度大、破除速度慢、成本费用高，还可能造成预留锚固钢筋不顺直、断裂的质量问题。为了加快施工进度，推进生产桥建设速度，保障农机早日通行作业，本工程借鉴采用套管法桩头破除的施工方法，旨在加快破桩头施工速度、降低破桩头费用、保护预留锚固钢筋，推进后续工序施工。

Abstract:

Cast-in-place piles represent a construction technique for the foundation treatment of cross-river bridges in water projects. This technique effectively provides a solid foundation for bridges. However, the traditional construction method for removing pile heads involves manual use of pneumatic picks to chisel away the concrete above the designed pile top elevation, exposing the pre-buried anchoring steel bars. This method not only poses great construction difficulties, features slow removal speed and high costs, but may also lead to quality issues such as non ·?straight and broken pre-buried anchoring steel bars. To accelerate the construction progress, speed up the construction of production bridges, and ensure early passage of agricultural machinery, this project draws on the casing pipe method for removing pile heads. The goal is to accelerate the construction speed of pile head removal, reduce costs, protect pre-buried anchoring steel bars, and facilitate subsequent construction processes.