上海地区大型桥梁基础桩型选择

根据上海软土地基地质条件和城市环境特点 ,通过收集本地区颇具特色的大型桥梁工程资料及笔者基础工程实践的回顾 ,认为桩型选择应考虑基础沉降变位控制与上部结构特性相协调 ,工程的城市环境是选择桩型的重要条件 ,选择桩型要满足工程建设要求。对大型水中墩钢管桩基础造价可能与钻孔灌注桩相近 ,甚至还要低。 PHC管桩是本市近年来具有较强发展潜力的桩型。

Selection of Pile Types of Large--Scale Bridge Foundation in Shanghai Area

According to the geological conditions of the soft soil subgrade and the urban environmental characteristics in Shanghai, through collecting the information of the large-scale bridge project with feature in the area as well as the retrospect of the foundation project practice from the author, it is thought that the selection of pile types shall consider the coordination of foundation settlement displacement control with the characteristics of superstructure. The urban environment of the project is the important conditions for selecting the pile types. The selection of the pile types shall meet the requirements of the project construction. The cost of large-scale water piers steel-pipe pile foundation may be near to the cost of cast-in-place pile, even less. PHC pipe pile is the pile types with stronger development potentialities in Shanghai in recent years.