深大圆形沉井基底隆起安全系数结构参数敏感性分析  

Sensitivity Analysis of Structural Parameters of the Basement Uplift Safety Factor of Large Open Caissons

作　　者：刘添俊[1] 马春景 金结飞 王谭[1] Liu Tianjun;Ma Chunjing;Jin Jiefei;Wang Tan(Guangzhou Municipal Engineering Group Co.,Ltd.,Guangzhou 510060,China)

机构地区：[1]广州市市政集团有限公司,广东广州510060

出　　处：《市政技术》2025年第1期137-143,共7页Journal of Municipal Technology

基　　金：广东省住房和城乡建设厅研究开发项目(2023-K9-240562);广州市建筑集团有限公司科技计划项目,建集[2023]186(BH20230317604)。

摘　　要：针对不同工况下的圆形沉井,采用高效的有限元分析软件OptumG2,并运用强度折减法对沉井的基底隆起安全系数进行了求解;通过对结构参数的敏感性分析,揭示了不同沉井规模和下沉阶段对基底稳定性的影响,并绘制了基底隆起安全系数的等值线图。该研究结果可为设计人员在实际工程中快速确定沉井基底隆起安全系数和优化施工方案提供科学依据和参考,以及为未来城市建设中的沉井设计提供有力支持。For circular caissons under various working conditions,the high efficient finite element analysis software OptumG2 was applied and the strength reduction method was employed to calculate the safety factor against basement uplift;Sensitivity analysis of structural parameters revealed the effects of different caisson sizes and sinking stages on base stability,contours of the base uplift safety factors were drew.The findings provide scientific basis and reference for designers to quickly determine the base uplift safety factors and optimize construction schemes in practical projects,while offering robust support for future caisson design in urban development.

关 键 词：基底隆起 安全系数 敏感性分析 有限元分析 飓风图 

分 类 号：TU470.3[建筑科学—结构工程]