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杭州湾跨海大桥海中平台匝道桥施工区域海况恶劣,地质条件复杂,钻孔灌注桩施工难度很大。匝道桥钻孔桩为单墩单桩结构,采用的钢护筒直径大、长度大,在钢护筒插打的过程中出现了部分钢护筒不同程度的变形,使钻孔施工无法进行。主要介绍了钢护筒的变形情况、原因分析、处理方法及预防措施。
Hangzhou Bay Bridge sea platform ramp bridge construction area harsh sea conditions, complex geological conditions, bored pile construction difficult. Ramp bridge bored pile is a single pile single pile structure, the diameter of the steel casing adopted is large and the length is big. During the process of inserting the steel casing, some steel casings have different degrees of deformation, so that the drilling construction can not be carried out. Mainly introduced the deformation of steel casing, the reasons for the analysis, treatment methods and preventive measures.