作　　者： (刘克文）; (阮永芬）; (林君伟）; (王志良）;

机构地区： 十四冶建设云南勘察设计有限公司,昆明650031 昆明理工大学建筑工程学院土木工程系,昆明650500

出　　处： 《结构工程师》 2017年第4期193-199,共7页

摘　　要： 基坑支护设计必须充分考虑周边环境的复杂性,因地制宜地采取有效支护方式进行支护。现对环境复杂的软土场地的深基坑支护设计方案进行比选,并分析多种联合支护结构方案的可行性、安全性及对临近地铁的影响。为了检验基坑设计方案能否有效控制邻近地铁隧道的位移,结合各施工工况、周边环境、土质情况等,采用有限元软件计算分析基坑开挖对隧道变形的影响。分析结果表明采用的联合支护设计方案合理、可行,能缩短工期,能为今后类似单一的支护结构难以满足设计要求时的深基坑支护设计提供参考。 The design of foundation pit supporting must give full consideration to the complex surroundings, the proper measures to local conditions should be taken to guarantee the effective support manner, This paper makes a comprehensive comparison and selection on the schemes of design and construction of deep foundation pits in soft soil, also analyzes their feasibility and security as well as its impact on the near the metro of the combined supporting structure scheme. In order to verify whether the design of foundation pits can effectively control the displacement of the tunnel adjacent metro based on the construction condition, surrounding environment, and soil conditions, the finite element software is applied to calculate and analyze the deformation influenceof tunnel. The analysis results show that the combined support design is reasonable, feasible, andit can shorten the period, and it can provide the reference when the similar single supporting structure is difficult to meet the design requirements of deep foundation pit supporting.

关 键 词： 联合支护结构 软土 地铁 复杂环境 位移控制