某地铁车站主体围护结构桩径优化设计

On optimal design for pile diameter of main enclosure structure of some subway station

以某地铁明挖车站工程为例,结合主体围护结构采用钻孔灌注桩的情况,选用常用的直径800 mm和1 000 mm的桩型进行计算,在满足围护结构受力及变形的条件下,通过桩径、桩间距、配筋、变形等进行了技术经济比选,最终选取了车站的围护桩为1 000 mm钻孔灌注桩,优化了设计。

Taking some open excavation station as the example, the paper selects common pile types with 800 mm and 1 000 mm pile diameter to undertake the calculation by combining with the adoption of the bored pile at the main enclosure structure, has the technical and economic com- parison for the pile diameter, pile distance, reinforcement, and deformation by meeting the demands for the enclosure structural stress and de- formation, and selects the bored piles with the diameter of 1 000 mm of the enclosure piles of the station, so it optimizes the design.