国家大剧院工程中的几个岩土工程问题  

Geotechnical aspects of the National Centre for the Performing Arts

作　　者：张在明[1] 沈小克[1] 周宏磊[1] 孙保卫[1] 唐建华[1] 

机构地区：[1]北京市勘察设计研究院有限公司,北京100038

出　　处：《土木工程学报》2009年第1期60-65,共6页China Civil Engineering Journal

摘　　要：国家大剧院工程基础埋深大(最深达32.5m)、地层不均匀、地下水赋存条件复杂、承压水头高、结构荷载很不均匀,由此带来了一系列复杂的岩土工程问题。重点对这些问题及所采取的分析评价方法和工程措施进行了介绍,主要包括基坑支护、施工中地下水控制、抗浮设计水位的确定、采取结构措施降低基底浮力和沉降分析5个方面内容。对大面积深基坑采取分步支护方案,用隔离、疏干和减压相结合的地下水控制措施,保证基坑施工的顺利进行;通过对北京市水资源供求平衡关系的分析,根据场地饱和-非饱和土的渗流分析结果,采取合理的结构措施,确定并大大降低了基底浮力,保证工程的抗浮稳定性。最后,采用地基与基础的相互作用原理,比较准确地预测整个基础平面内的沉降与差异沉降的分布。通过上述分析方法及建议的工程措施,使本工程的地基基础方案得以安全、经济地顺利实施。Construction of the National Centre for the Performing Arts encountered many sophisticated geotechnical problems, i.e. deep excavation （32.5m at the deepest）, complex groundwater occurrence and high pressure, nonhomogenous soil strata and non-uniform structure loading. Some of these key issues are introduced, including design of retaining structure system for the deep excavation, groundwater control during foundation installation, decision on the design anti-buoyancy ground water levels taking the potential groundwater variation into account; structural measures to reduce the uplift force on the foundation and analysis of the differential settlements induced by the superstructures founded on a continuous foundation slab. The above integrated analysis and the engineering measures make the proposed foundation scheme realized safely and economically.

关 键 词：国家大剧院 地下水 结构抗浮 沉降 深基坑 

分 类 号：TU463[建筑科学—结构工程]