为采用预应力技术,逐步实现大跨、无柱地铁车站结构,选择北京地铁亦庄线宋家庄站～肖村站无柱明挖区间为依托工程,进行了试验研究。依托工程的结构方案选用了预应力密排框架箱形结构,由有限元计算分析、和现场有效预应力监测结果可知,结构构件的裂缝控制能够满足要求,可以达到一般情况下不出现裂缝的要求,同时也是保证耐久性能、和抗疲劳性能满足要求的重要措施。 In order to adopt prestressing technology and gradually realize the structure of large-span and pillarless subway station, a pilot study was conducted based on the pillarless digging interval of Songjiazhuang station to Xiaoqia station of Beijing Yizhuang line. Based on the structural scheme of the project, the box structure of prestressed dense-row frame is selected. According to the finite element analysis and the monitoring results of the effective prestress in the field, the crack control of structural members can meet the requirements and can meet the requirement of no cracks in general , But also to ensure durability performance, and fatigue resistance to meet the requirements of important measures.