某LNG工程软土地基深基坑支护结构受力

Force on supporting structure of deep foundation pit in LNG project soft foundation

深厚软土地基对深基坑支护结构影响巨大,支撑设计合理与否直接关系基坑开挖的安全和经济。结合某LNG工程实例,对软土地基深基坑支护结构受力进行分析,重点研究了基坑底板厚度、支护墙折角对支护结构受力的影响,并对内支撑的传力距离进行分析,总结了柔性支撑设计及施工应重点关注的问题,为类似支护结构设计提供借鉴。

The deep soft soil foundation has great influence on the supporting structure of deep foundation pit,and whether the support design is reasonable or not is directly related to the safety and economy of foundation pit excavation.In this paper,combined with an example of a LNG project,the stress of the supporting structure of deep foundation pit on soft soil foundation is analyzed and discussed.The influence of the thickness of foundation pit bottom plate and the bending angle of supporting wall on the force of supporting structure is emphatically studied,and the force transmission distance of the internal support is analyzed.The problem that should be paid attention to the design and construction of flexible support was summarized,which could provide a reference for the design of similar support structure.