三江口大桥扩大基础设计及施工

Design and Construction of Expanded Foundation of Sanjiangkou Bridge

摘要:

依托三江口大桥扩大基础的设计和施工，论述了采用扩大基础的大桥在扩基构造、埋置深度、参数取值和基坑回填等方面的细节，提供了相关经验。结果表明，扩大基础造价相对较低，施工周期较短，且施工风险较低。从经济、施工工期和风险控制角度看，在地质条件好的地区，大桥采用扩大基础比其他基础形式更具优势。

Abstract:

Relying on the design and construction of the expanded foundation of the Sanjiangkou Bridge, the details of the expanded foundation structure, burial depth, parameter values and foundation pit backfilling of the bridge using the expanded foundation are discussed. The relevant experience is provided. The results indicate that the cost of expanding the foundation is relatively low, the construction period is short, and the construction risk is low. From the perspective of economy, construction period, and risk control, in areas with good geological conditions, the expanded foundation of the bridge is better than other foundation forms.