桥梁钻孔灌注桩施工遇阻成孔技术

Hole-forming Technology in Construction of Bridge Cast-in-situ Pile

摘要:

钻孔灌注桩因单桩承载力高、抗震性能好和地质适应性强等特点，成为桩基工程领域应用广泛的一种承载形式。以某桥梁工程为例，研究以下三种桩基施工遇阻情况：一是钢护筒无法正常埋设；二是钻进过程中钢护筒变形或偏斜；三是钻进过程中遇障碍物无法钻进。并据此提出了针对性的桩基遇阻成孔解决方案，为今后同类工程的施工提供借鉴和参考。

Abstract:

The cast-in-situ pile has become a bearing form widely used in the field of pile foundation engineering because of its characteristics such as high bearing capacity, good seismic performance and strong geological adaptability. Taking a bridge project as an example, the following three kinds of pile foundation obstructed in construction are studied. First, the steel pile casing is hard to be buried normally. Second, the steel pile casing is deformed or deflected in the drilling process. Third, the steel pile casing is hard to drill in the process of drilling encountered obstacles. In view of the above, the corresponding solution of hole forming in pile foundation is put forward to provide reference for the construction of similar projects in the future.