深基坑开挖变形的三维数值模拟研究  

Study on three-dimension numerical simulation of deformation of the deep-foundation pit with excavation

作　　者：李俊才[1] 张倬元[2] 许强[2] 

机构地区：[1]南京大学地球科学系 [2]成都理工大学,四川成都610059

出　　处：《南京工业大学学报（自然科学版）》2005年第3期1-7,共7页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金资助(项目号:50278042)

摘　　要：采用三维快速拉格朗日差分分析方法(FastLagrangianAnalysisofContinua3D)将南京A、B大厦支护结构(悬臂支护结构、单层支点混合支护结构、钻孔灌注桩连拱支护结构)与一定范围内的土体(长、宽、高)作为一个整体,结合基坑实际开挖降水及施工工序,模拟和反映支护结构体的空间受力特征和变形,周围土体的位移、沉降及其相关关系,并将模拟结果与实测资料进行对比分析,得出了一些有益的结论,为三维数值模拟研究在深基坑工程中的应用作了有益的尝试。With the method of Fast Lagrangian Analysis of Continua 3D, the retaining structures of A and B mansions in Nanjing (cantilever retaining structure, single-pivot composite retaining structure, and borehole cast-in-place concrete pile multi-arch retaining structure) and the soil mass with in certain extension (length, width and height) are treated as one entirety. Combining with the practical dewatering in foundation pit excavation and the construction procedures, the space loading character and deformation of the retaining structure, the displacement and settlement of the surrounding soil mass, and their correlativity are modeled and discussed, the modeling results are comparecl and analyzed with the actual measured data, and some useful conclusions are achieved. It is a beneficial attempt to apply three-dimension numerical simulation research in the deep-foundation pit project.

关 键 词：数值模拟研究 深基坑开挖 三维 变形 单层支点混合支护结构 Analysis 悬臂支护结构 连拱支护结构 钻孔灌注桩 深基坑工程 差分分析 拉格朗日 施工工序 空间受力 周围土体 相关关系 对比分析 实测资料 模拟结果 特征和 结构体 

分 类 号：TU753.1[建筑科学—建筑技术科学] X145[环境科学与工程—环境科学]