环形支护体系在石夏北深基坑中的应用

Application of Annular Bracing System on Shixia North Deep Foundation Pit

为论证环形支护体系的优缺点及适用性,促进环形支护体系的发展和广泛应用,结合石夏北深基坑工程实例,从工程概况及地质条件、支护方案设计、支护结构计算、基坑施工及监测成果等5个方面对环形支护体系的应用进行了详细的分析与研究,结果表明:环形支护体系较传统基坑支护方法具有整体刚度大、变形小、施工空间大、受力性能好等明显优势,但设计计算与实际受力不符,需进一步研究和完善,应提高施工质量与技术,减小环梁的不均匀沉降等。

For demonstrating advantages,disadvantages,applicability and promoting the development and wide application of annular bracing system,according to the engineering example of Shixia north deep foundation pit,the application of annular bracing system was detailedly analyzed and researched in general situation and engineering geologic conditions,supporting design,supporting structure calculation,foundation pit construction and the monitoring results,etc.Compared with traditional supporting methods,annular bracing system has obvious advantages such as larger rigidity,lesser deformation,larger construction space,better mechanical properties,etc.It is urgently needed to further research and improve for the differences between design calculation and actual stress,improve the construction quality and technology,and reduce the ring beam uneven settlement,etc.