(1 国家电力公司中南勘测设计研究院  长沙 410014；2 中南大学土木建筑学院  长沙 410075)
【提要】以广州地铁三号线某车站深基坑支护工程为背景，采用以开挖深度、支撑位置和圈梁截面为设计变量，以支护桩变形曲线面积为目标函数的设计优化体系，对支护结构设计及施工工艺进行方案优化，采用间隔桩作为深基坑围护结构。现场监测表明，该设计体系、支护方案及施工工艺切实可行，可供类似工程借鉴。
【关键词】  深基坑  方案优化  设计  施工  监测
Plan Optimization of the Design and Construction of Bracing Structure for Deep Excavation/
Luo Jinsheng1,Wei Limin2(1 Midsouth Design and Research Institute for Hydroelectric Projects,Changsha 410014,China;2 Civil Engineering and Architecture College,Central South University,Changsha 410075,China)
Abstract:The deep excavation project by taking the certain subway station in line No.3 of Guangzhou as an example is introduced.The plan of design and construction is optimized.The optimal design parameters are the depth of excavation,the position of bracing and the section areas of the ring beam.The object function is the area of the deformation of the retaining pile.The data of monitoring verifies that the system of optimization,the design plan and the construction technology process are valid and can be used for reference by similar projects.
Keywords:deep excavation;plan optimization;design;construction;monitoring