【作者】 邱品茗；

【导师】 蔺安林； 杨其新；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2009， 硕士

【摘要】 随着我国越来越多的城市投入到地铁隧道的修建当中,遇到的超浅埋隧道的施工问题逐渐增多。本文选取广州地铁5、6号线轨道交通工程区庄站作为研究对象,主要包括车站的通风道施工,站厅施工和5、6号线的上下交错施工。通过运用软件,对地铁超浅埋群洞隧道进行数值模拟,并且得出合理、科学的隧道施工方法,以期达到更加经济、合理、安全的目标。本文运用大型有限元ANSYS计算软件,首先建立群洞的平面模型并进行模拟开挖,研究得出各个隧道之间的开挖相互影响;其次分别建立超浅埋超大跨暗挖隧道,超浅埋高断面暗挖隧道和斜交叉短距离近接双线隧道的实体单元三维模型,相对准确地模拟隧道开挖的过程,并且进行开挖计算以及变形分析。根据计算结果分析各个开挖步骤对于隧道本身沉降和变形的影响,分析各个开挖步骤对于地面沉降的影响以及相互开挖步骤之间的影响。同时结合现场的施工数据以及现场检测、分析的结果,证明采用CRD法、中洞法开挖超大跨超浅埋隧道的合理性与科学性,并得出近接交叉隧道开挖的顺序规律。通过对施工技术、施工控制理论及施工力学地深入研究分析,得出城市高跨隧道的施工控制技术。本文对城市地铁超浅埋群洞隧道地数值模拟,结合现场数据总结出了城市高跨隧道施工控制技术。这些控制技术对以后施工中遇到相似问题的处理有了很好的借鉴作用和一定的参考价值,同时也可以不断地丰富超浅埋隧道施工的技术以及研究内容。我们对复杂施工过程和体系转换过程的岩土、结构受力行为和变形机理进行了理论探索,并在现场监测和信息反馈施工中提供了重要参考数据,对今后类似工程的理论探索和研究方法提供了成功的案例。更多还原

【Abstract】 With a growing number of cities of china getting into the construction of the subway, the problems in the construction of the ultra-shallow tunnels increased gradually. This thesis select Qu Zhuang station on the rail transit line five and six of Guangzhou metro to study, including the construction of station’s ventilation, the construction of station’s office and the staggered from top to bottom construction of line five and six. Through the software, we simulate the subway ultra-shallow tunnels numerically, and come up with a reasonable and scientific method of tunnels’ construction in order to achieve more economical, reasonable and security objectives.Firstly in this thesis, through the use of large-scale finite element ANSYS software,we establish the plane model of tunnels to simulate the excavation;secondly,we establish three-dimensional model of physical units respectively,including an ultra-shallow and great span tunnel, an ultra-shallow and ultra-high profile tunnel and a two-wire short-range oblique cross proximity tunnel. Through these models we can simulate the process of tunnel excavation relatively accurately and calculate excavation stress and analysis the deformation of tunnel. We analysis the impact in the various steps of the excavation to the tunnel itself and the deformation based on the calculation results, analysis the impact in the various steps of the excavation to the land subsidence, as well as the impact of stress between the steps. At the same time,we combinate with construction site and on-site testing and data analysis,to prove using CRD method in ultra-shallow excavation of large cross tunnels rationalitily and sciencely, and came to sequence in the excavation of the proximity cross- tunnel. Through the depth study of construction technology, the construction of control theory and construction mechanics,we come to the control technology of the construction to the high cross- tunnel in the city.We sum up the control technology of the construction to the high cross-tunnel in the city based on the numerical simulation of subway ultra-shallow tunnels and the field data. These will play a good reference and value in the construction when we encounter the similar problems in the future. And the same time, these can continue to enrich the technology and research in the contraction of ultra-shallow tunnels. We explore theoretically in the complexity of the construction process, the geotechnical, structural behavior and deformation mechanism of the conversion process. We provide an important reference to the scene of constraction monitoring and in the constraction feedback. And the same time,these provide a successful case to the theoretical exploration and research methods of the similar projects in the future.更多还原