摘要
郑州绿地广场基坑支护采用钻孔灌注桩挡土墙和3道钢筋混凝土内支撑,内支撑采用内环和外环两道环、中间连以系杆形成桁架。因主体设计更改,基坑支撑结构与主体结构柱位置发生冲突,需对支撑进行替换改造。根据支撑受力大小和杆件与柱的位置关系,将冲突处理分为节点替换型、杆件替换型和杆件补强型,针对不同类型提出针对性加强措施,并介绍了关键施工技术。监测结果证明,支撑轴力变化平稳,因替换引起的变形也不明显,保证了主楼顺利施工。
Bored pile retaining wall and three inner reinforcement concrete supports are adopted in foundation excavation of Zhengzhou Green Space Plaza. The internal support consists of inner circle and outer circle,and the circle supports are connected with tie bars. Due to change of building design,the supports collide with columns,thus the supports need to be replaced. According to positions of supports and columns,treating methods of the conflict can be classified to three types：joints replacing,struts replacing and struts strengthening. Then,different measures are taken,and key construction technologies are pointed out. According to monitoring results,axial force of supports is stable and no obvious deformation is caused,and the construction is completed successfully.
出处
《施工技术》
CAS
北大核心
2010年第5期44-46,共3页
Construction Technology
关键词
基坑
支撑替换
加固
施工技术
foundation excavation
support replacing
reinforcement
construction technology
