基于PLAXIS的深基坑支护设计的数值模拟.pdf

26 2 Vo.l 26, No. 2 20104 Structural Engineers Apr. 2010 PLAXIS 1, * 2 张如林 徐奴文 ( 1. , 200092; 2., 116024) 深基坑开挖和支护是岩土工程领域研究的热点和难点, 如何通过有 控制其变形使基坑工程 安全又经济, 是人们不断探索的课题以苏州地铁 2号线某实际深基坑工程为研究对象,运用有限元分 析软件 PLAXIS对基坑开挖支护全过程进行了数值模拟, 分析了基坑开挖深度支护结构刚度支撑刚 度土体参数等设计施工和自然环境因素对支护结构变形的影响, 并给出一些控制基坑变形的方法与 建议,为深基坑工程的设计和施工提供了参考 深基坑, 弹塑性模型, 支护, 数值模拟 Numerical Simulation of Timbering Design of Deep Foundation Pits Based on PLAXIS 1 2 ZHANG Rulin XU Nuwen ( 1. State Key Laboratory for Disaster Reduction in CivilEngineering, TongjiUniversity, Shanghai200092, China; 2. Center forRock Instability and Seis icity Research, Faculty of Infrastructure Engineering, Dalian University of Science and Technology, Dalian 116024, China) Abstract Excavation and support of deep foundation pit engineering is one of pop and difficult proble s in rock soil engineering. How to effectively control defor ation of foundation pits and ake foundation pit engineering safe and econo ical is the task that people always probe. On the ground of deep foundation pit retaining structure engineering in a station on Suzhou Metro Line 2, the nu erical si ulation by eans of elastoplastic finite ele ent progra PLAXISwas carried out for the process of excavation and supporting. The factors of design, construction and natural environ enton effect of thedefor ation of ti bering structureswere studied, including the depth of excavation, the rigidity of ti bering structures, the rigidity of braces and para eters of soil ass etc. So e ethods and adviceswere proposed to control the defor ation of foun