Template开题报告吴军龙..doc

第二部分:毕业设计（论文）开题报告 (Part II: Senior Project Proposal) 课题名称 (Project Title) Design of supporting system at a deep excavation in soft clays 课题来源 (Source) 课题类型 (Project Type) 学生姓名 (Student Name) 吴军龙 学 号(Student No.) 2107090323 专 业 (Student Major) 道路桥梁与渡河工程 (Highway Bridge Eng.) 指导教师 (Advisor) 马建秦 Advisors Comments and Suggestions: Advisor’s Signature: 毕业设计（论文）开题报告 Senior Project Proposal 学 生 姓 名 : (Student Name): 学 号 : (Student No. ): 专 业 道路桥梁与渡河工程（国际班） (Student Major): Highway Bridge Engineering 指 导 老 师 : （ Advisor ） : Changan University 1.Background With the development of productivity and economy.The distribution of the city has had a great change,especially with the increasing of population density and traffic pressure.People stat to focus on developing underground space by all manner of means. Deep excavation has became a hot spot in geotechnical engineering we concerned about.It is the a comprehensive subject of Engineering geological exploration ,excavation supporting structure design ,construction management and testing on site.deep excavation is not only take measure to guarantee the safe and stability of the tunnel,but also control ground movement and protect the surroundings.If not handled properly, these problems will cause serious influence to the construction and delay the construction period, causing economic losses. To minimise the effects of the construction to adjacent historical buildings a bored tunnel will be adopted for the underground sections in the city centre.The tunnel follows the street pattern as closely as possible and descends to a great depth.consequently the metro station are located at significant depth(over 30 meters below surface le