摘要
结合某地铁区间上部TOD开发工程实例,针对上部规划高层建筑布置于区间结构的一侧造成荷载偏压严重这一问题,综合考虑地铁区间与开发建筑实施先后顺序和预留条件,提出采用变刚度调平设计理念,采取地基局部增强变刚度、桩基变刚度和结构变刚度三项措施,并利用有限元分析软件模拟进行分析验证。结果表明,采用变刚度调平设计能够有效控制荷载极端不平衡条件下的地铁区间结构沉降差异,既确保了地铁工程的建设工期和运营安全需求,也为上部开发预留了灵活的开发条件。
Combined with a transit oriented development(TOD) project in the subway interval, in view of the problem of heavy load bias caused by the high-rise buildings located on one side of the interval structure, considering the construction sequence and reservation conditions of subway and TOD project, the design concept of balance variable stiffness was put forward, three measures of variable stiffness on the partial ground, pile foundation and structure were adopted, and analysis and verification was performed using finite element analysis simulation method. The results show that the design of balance variable stiffness can effectively control the different subsidence of subway structure under extremely unbalanced load, which will not only ensure the construction duration and operational safety of subway projects, but also reserve flexible developing conditions for the TOD project.
作者
杨建学
Yang Jianxue(China Railway First Survey and Design Institute Group Ltd.,Xi'an 710043,China)
出处
《工程勘察》
2021年第11期1-5,61,共6页
Geotechnical Investigation & Surveying
基金
国家高铁联合基金项目(U1934213)
国家自然科学基金(51878572)。
关键词
地铁区间
TOD开发
变刚度调平设计
有限元分析
subway interval
transit-oriented development
design concept of balance variable stiffness
finite element analysis
