基于数值分析的深基坑围护结构优化设计  

Optimization design of retaining structure of deep excavation based on numerical analysis

作　　者：汪鹏程[1] 文杰[1] 邵长征[1] 刘志[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2016年第9期1248-1253,共6页Journal of Hefei University of Technology：Natural Science

摘　　要：文章以合肥轨道交通1号线太湖路站深基坑工程为例,运用Flac3D有限差分软件对深基坑开挖进行模拟计算;分析了在钻孔灌注桩+内支撑的围护结构中,支撑刚度、桩体内径、支撑的竖向间距及混凝土支撑间距对桩体侧移变形和内力的影响程度;综合考虑结构可靠性和经济成本,提出了深基坑围护结构的优化设计方案,通过模拟计算得出了优化后的设计方案能在满足工程安全的前提下使地铁基坑施工更加科学合理,降低工程造价并缩短工期。Based on the deep excavation construction of Taihu Road Station of Hefei Metro Line 1 ,the complex excavation process was simulated and calculated by employing the numerical analysis software Flac3D .T he influence degree of the stiffness of support ,the pile diameter ,the vertical distance of sup‐port and the concrete support spacing on the pile lateral deformation and internal force in the palisade structure of bored piles with internal support was analyzed .Then the optimization design of deep ex‐cavation retaining structure was put forward in consideration of the structural reliability and economic cost .T he results of simulation and calculation show that the optimized design scheme can meet the re‐quirements of engineering safety ,make the subway station deep excavation more scientific and reason‐able ,and decrease the engineering cost and construction time .

关 键 词：深基坑 围护结构 数值分析 优化设计 

分 类 号：TU473.2[建筑科学—结构工程]