盾构施工引起地层变形的机理与数值模拟研究
发布时间：2018-07-18 18:48
【摘要】：随着国内矿井建设朝着大型化、集约化和现代化发展,传统的矿井施工方法面临新的挑战,难以满足大型矿井快速安全建设的要求。盾构具有机械化程度高、施工质量好、掘进速度快、节省劳动力、安全等明显优势,在矿山中的应用越来越多,成为矿山开采掘进常用的机械设备。同时随着我国城市化的进程,人口大量向城市集中,城市规模不断扩大,于是地下空间的开发成为城市建设的必然趋势。而隧道工程是地下工程的重要组成部分,盾构法因其众多优点而被广泛应用于城市隧道工程的建设中。由于在盾构施工工程中,地层不可避免的会受到扰动而产生变形,当地层变形过大时便会引起一系列的工程问题。因此,对盾构施工引起的地层变形进行研究具有重大意义。本文首先对隧道盾构施工引起地层变形的国内外研究成果进行分析总结,主要有经验公式法、模型试验法、理论解析法、数值分析法及现场实测法等预测方法;然后对盾构施工引起地层变形的机理进行研究分析,简单介绍了盾构法及其在我国的发展情况,详细叙述了盾构施工引起地层变形的时空效应理论,对盾构施工引起地层变形的原因进行深入分析;结合杭州地铁1号线文泽路站~文海南路站区间工程实际,进行盾构选型和管片结构设计,对盾构施工过程进行受力计算,采用FLAC3D建立数值模型,对盾构施工过程进行了三维动态数值模拟,研究分析盾构施工引起地层变形的规律;制定现场监测方案,对现场实测数据和数值模拟结果进行对比分析;最后提出控制地层变形的工程措施,如避免盾构停机、合理控制土仓压力等。研究结果表明采用数值模拟对实际工程进行地层变形预测和分析是可行的。本文研究成果对盾构隧道设计与施工具有一定的指导和参考意义。
[Abstract]:With the development of large-scale, intensive and modern mine construction in China, the traditional mine construction methods are facing new challenges, and it is difficult to meet the requirements of rapid safety construction of large-scale mines. Shield machine has many advantages, such as high mechanization, good construction quality, fast driving speed, saving labor force, safety and so on. At the same time, with the process of urbanization in China, a large number of people concentrate to the city, the scale of the city is expanding, so the development of underground space has become the inevitable trend of urban construction. Tunnel engineering is an important part of underground engineering, shield method is widely used in the construction of urban tunnel engineering because of its many advantages. In shield construction engineering, the formation will inevitably be disturbed and deformed, when the local layer deformation is too large, it will cause a series of engineering problems. Therefore, it is of great significance to study the formation deformation caused by shield construction. In this paper, the domestic and foreign research results of ground deformation caused by shield tunneling are analyzed and summarized, including empirical formula method, model test method, theoretical analysis method, numerical analysis method and field measurement method. Then, the mechanism of formation deformation caused by shield construction is studied and analyzed, the shield method and its development in China are introduced, and the space-time effect theory of stratum deformation caused by shield construction is described in detail. The causes of formation deformation caused by shield construction are deeply analyzed, combined with the actual project between Wenze Road Station and Wenhai South Road Station of Hangzhou Metro Line 1, the shield type selection and segment structure design are carried out, and the force acting on shield construction process is calculated. Using FLAC3D to establish numerical model, the 3D dynamic numerical simulation of shield construction process is carried out, and the law of ground deformation caused by shield construction is studied and analyzed, and the on-site monitoring scheme is established, and the field measured data and numerical simulation results are compared and analyzed. Finally, some engineering measures are put forward to control the formation deformation, such as avoiding shield machine shutdown and reasonably controlling the pressure of soil bunker. The results show that it is feasible to predict and analyze the formation deformation by numerical simulation. The research results of this paper have certain guidance and reference significance for shield tunnel design and construction.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43
本文编号：2132649
[Abstract]:With the development of large-scale, intensive and modern mine construction in China, the traditional mine construction methods are facing new challenges, and it is difficult to meet the requirements of rapid safety construction of large-scale mines. Shield machine has many advantages, such as high mechanization, good construction quality, fast driving speed, saving labor force, safety and so on. At the same time, with the process of urbanization in China, a large number of people concentrate to the city, the scale of the city is expanding, so the development of underground space has become the inevitable trend of urban construction. Tunnel engineering is an important part of underground engineering, shield method is widely used in the construction of urban tunnel engineering because of its many advantages. In shield construction engineering, the formation will inevitably be disturbed and deformed, when the local layer deformation is too large, it will cause a series of engineering problems. Therefore, it is of great significance to study the formation deformation caused by shield construction. In this paper, the domestic and foreign research results of ground deformation caused by shield tunneling are analyzed and summarized, including empirical formula method, model test method, theoretical analysis method, numerical analysis method and field measurement method. Then, the mechanism of formation deformation caused by shield construction is studied and analyzed, the shield method and its development in China are introduced, and the space-time effect theory of stratum deformation caused by shield construction is described in detail. The causes of formation deformation caused by shield construction are deeply analyzed, combined with the actual project between Wenze Road Station and Wenhai South Road Station of Hangzhou Metro Line 1, the shield type selection and segment structure design are carried out, and the force acting on shield construction process is calculated. Using FLAC3D to establish numerical model, the 3D dynamic numerical simulation of shield construction process is carried out, and the law of ground deformation caused by shield construction is studied and analyzed, and the on-site monitoring scheme is established, and the field measured data and numerical simulation results are compared and analyzed. Finally, some engineering measures are put forward to control the formation deformation, such as avoiding shield machine shutdown and reasonably controlling the pressure of soil bunker. The results show that it is feasible to predict and analyze the formation deformation by numerical simulation. The research results of this paper have certain guidance and reference significance for shield tunnel design and construction.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43
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