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| Design and 3D Numerical Analysis of a Deep Excavation in Close Proximity to Sensitive Properties |
| CHANG Lin － yue，SHEN Jian，XU Zhong － hua |
| East China Architecture Design ＆ Research Institute Co． Ltd． ，Shanghai 200002，China |
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Abstract Research purposes: With the increasing depth and size of the excavations，as well as the more complex and sensitive surrounding environmental conditions，more stringent deformation control requirements are needed for the excavation engineering． As a result accurate prediction of the deformation of the excavation and surrounding environments becomes very important．
Research conclusions: The design scheme of a deep excavation in close to 6 － storey brick residential building in Shanghai soft soil and the technical measures for surrounding environment projection are described in detail． Then the three － dimensional finite element model is established to simulate the influence of excavation on the adjacent buildings by PLAXIS 3D Foundation program． Calculated deformation of the retaining wall and the settlements of the adjacent buildings are in good agreement with the measured values． The influence of excavation on surrounding environments is effectively predicted by the proposed model and analysis method，which provide an important reference for the design and construction．
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Received: 21 May 2011
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［1］ 陈福全，汪金卫，刘毓氚． 基坑开挖时邻近桩基性状的数值分析［J］． 岩土力学，2008( 7) : 1971 － 1976．
Chen Fuquan，Wang Jinwei，Liu Yuchuan． Numerical Analysis of Pile Response Due to Braced Excavation －induced Soil Lateral Movement ［J］． Rock and Soil Mechanics，2008( 7) : 1971 － 1976．
［2］ 钟铮，许亮，王祺国，等． 紧邻保护建筑的深基坑逆作法设计与实践［J］． 岩土工程学报， 2010( S1) : 249 － 255．
Zhong Zheng，Xu Liang，Wang Qiguo，etc． Design and Practice of Top － down Method in Deep Foundation Pits Very Close to Protected Buildings［J］． Chinese Journal of Geotechnical Engineering，2010( S1) : 249 － 255．
［3］ 董诚，郑颖人，陈新颖，等． 深基坑土钉和预应力锚杆复合支护方式的探讨［J］． 岩土力学，2009 ( 12) : 3793 －3796．
Dong Cheng， Zheng Yingren， Chen Xinying， etc．Research on Composite Support Pattern of Soil Nails and Prestressed Anchors in Deep Foundation Pits［J］．Rock and Soil Mechanics，2009( 12) : 3793 － 3796．
［4］ 蔡袁强，李碧青，徐长杰． 挖深不同情况下基坑支护结构性状研究［J］． 岩土工程学报，2010( S1) : 28 － 31．
Cai Yuanqiang，Li Biqing，Xu Changjie． Characteristics of Retaining Structures of Deep Foundation Pits under Different Excavation Depths［J］． Chinese Journal of Geotechnical Engineering，2010( S1) : 28 － 31．
［5］ 徐向辉． 虹桥综合交通枢纽深大基坑关键技术研究［J］．铁道工程学报，2009( 6) : 44 － 49．
Xu Xianghui． Research on the Key Technology for Big and Deep Foundation Pit for Shanghai Hongqiao Integrated Transport Hub ［J］． Journal of Railway Engineering Society，2009( 6) : 44 － 49．
［6］ 徐中华，王卫东． 敏感环境下基坑数值分析中土体本构模型的选择［J］． 岩土力学，2010( 1) : 258 － 264．
Xu Zhonghua， Wang Weidong． Selection of Soil Constitutive Models for Numerical Analysis of Deep Excavations in Close Proximity to Sensitive Properties ［J］． Rock and Soil Mechanics，2010( 1) : 258 － 264．
［7］ SCHANZ T，VERMEER P A，BONNIER P G． The Hardening Soil Model Formulation and Verification ［C］ / / Beyond 2000 in Computational Geotechnics，Amsterdam，Balkema: ［s． n． ］， 1999: 281 － 296．
［8］ 徐中华，王建华，王卫东． 主体地下结构与支护结构相结合的复杂深基坑分析［J］． 岩土工程学报，2006( S) :1355 － 1359．
Xu Zhonghua， Wang Jianhua， Wang Weidong．Analysis of a Complicated Deep Excavations Supported by Substructures［J］． Chinese Journal of Geotechnical Engineering，2006( S) : 1355 － 1359．
［9］ 刘国彬，王卫东． 基坑工程手册( 第二版) ［M］． 北京:中国建筑工业出版社，2009．
Liu Guobin，Wang Weidong． Excavation Engineering Manual ( 2nd Edition ) ［M］． Beijing: China Architecture ＆ Building Press，2009．
［10］ WANG J H，XU Z H，WANG W D． Wall and Ground Movements Due to Deep Excavations in Shanghai Soft Soils［J］． Journal of Geotechnical and Geoenvironmental Engineering，ASCE，2010( 7) : 985 － 994．
［11］ 徐中华． 上海地区支护结构与主体地下结构相结合的深基坑变形性状研究［D］． 上海: 上海交通大学，2007．
Xu Zhonghua． Deformation Behavior of Deep Excavations Supported by Permanent Structure in Shanghai Soft Deposit［D］． Shanghai: Shanghai Jiao Tong University，2007．
［12］ DG/TJ 08—61—2010，基坑工程技术规范［S］．
DG/TJ 08—61—2010，Excavation Engineering Technical Specifications［S］．
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2011, Vol. 28 
