复杂环境的深基坑工程中多种支护型式的应用研究

摘要

With the development of construction projects,there are some deep and complex surrounding environment of deep foundation pit engineering. Single support structure is difficult to meet the design requirements,so according to the different environment of foundation pit,anchor pile,anchor to anchor and internal bracing were chosen based on local conditions for a variety of joint support structure supporting the design and construction. For a deep foundation pit in Kunming used a variety of joint design supporting,the various profiles in excavation unit is calculated and the overall collaborative is computed. And then we calculated by hand to check the safety of the supporting structure. The results show that using the new combined support rational design can shorten period, achieve good economic and social benefits,and provide a reference for future similar deep excavation design.%随着建筑工程的发展，会遇到一些较深而周边环境复杂的深基坑工程。单一的支护结构难以满足设计要求，而是需要根据基坑不同的周边环境，因地制宜的桩锚、对锚及内支撑等多种支护结构进行联合支护设计及施工。现对昆明某深基坑中采用的多种联合支护结构进行设计支护，并对基坑各剖面进行单元计算与整体协同计算，并且通过手算复核各支护结构的安全性。结果表明采用多种支护型式进行支护设计的合理性，能缩短工期，取得很好的经济效益及社会效益，为今后类似深基坑支护设计提供参考。