【作者】 马忠政； 马险峰； 徐前卫； 王磊；

【Author】 Ma Zhongzheng,Ma Xianfeng,Xu Qianwei,Wang Lei Shanghai Shentong Metro Group Co.,Ltd.,200010,Shanghai,China

【机构】 上海申通地铁集团有限公司； 同济大学岩土及地下工程教育部重点实验室； 同济大学地下建筑与工程系； 上海交通大学船舶海洋与建筑工程学院；

【摘要】 针对上海轨道交通10号线溧阳路站—曲阳路站区间隧道穿越四平路沙泾港桥桩基的工程问题,提出了地基加固及扩大板式基础托换的施工方案,并对整个施工过程进行了地基加固处理、桥下基坑开挖、支撑架设、桩基托换等一系列三维动态数值模拟,重点分析了施工过程中桥梁的变形和受力性态以及桩基的承载力变化。计算结果表明,在确保桥梁正常通行的同时,地基加固及扩大板式基础托换法能够有效减小施工期间桥梁的沉降、改善桥梁结构的受力形态,并满足其控制标准的要求。研究结果可为本工程及今后类似工程的设计与施工提供借鉴和参考。更多还原

【Abstract】 In view of the interval tunnels on Shanghai Metro Line 10,which penetrate the pile foundation of Shajinggang Bridge on Siping Road,a plan of foundation reinforcement and expanded raft foundation underpinning is proposed for this project.Then a series of three dimensional dynamic numerical simulation of the entire construction process is carried out,including foundation reinforcement, pit excavation,braces erection and pile underpinning,etc. This analysis mainly focuses on the deformation the stress behavior of bridge and the bearing capacity change of piles. The results indicate that,while ensuring the bridge’s normal traffic capacity,the foundation reinforcement and the expanded raft underpinning can effectively reduce road surface settlement,improve the stress behavior of bridge structure and satisfy its controlling standard accordingly.The research proves to may be useful in guiding this project and providing design and construction reference for the future similar projects.更多还原