厚软土覆盖层区域高桩码头引桥桩基选型研究

Research on pile foundation selection of approach bridge of high-pile wharf in thick-soft soil covering area

高桩码头引桥部分一般位于河漫滩上,而对常见的厚软土覆盖层河漫滩,合理地选择安全、经济的桩基型式,是工程设计中必须深入研究解决的问题。结合工程实例,对厚软土覆盖层河漫滩地段地质特点进行分析,并从桩基施工难度、结构安全性及实施经济效果等角度,对钻孔灌注桩和PHC管桩两种桩型进行研究比选。根据比选结果,选择陆上施打PHC管桩作为引桥桩基。施工完成后,通过桩基检测,工程质量良好,经济效益明显。

The approach bridge of a high - pile wharf is generally located at the river beach where usually thick - soft soil covering is distributed. Therefore, an in - depth research on reasonable selection of a safe and economic pile foundation must be car- ried out. In the combination of a practical case, the geological characteristics of thick - soft soil covering beach is analyzed and drill - grouting pile and PHC pipe - pile are researched and compared from the aspects of construction difficulty, structural safety and economic effectiveness of implementation. Through comparison, PHC pipe - pile is selected as the pile foundation of bridge approach. After construction, the measurement of pile foundation shows that the construction quality is in a good condition.