特大悬索桥葫芦型基坑支护三维数值分析及施工监测方案研究
发布时间：2018-10-15 16:11
【摘要】：地下连续墙作为一种优良的挡土防水结构,自问世以来,经过将近一个世纪地发展,在世界上得到了广泛的应用,不仅积累了大量的施工经验,其理论知识也已成体系。到目前为止,矩形与圆形等简单形状地下连续墙已经为世人所熟练运用,但是随着对地下连续墙安全性与经济性更高的追求,工程师开始采用一些特殊形状的地下连续墙结构,并希望以此得出相关理论,积累施工经验,从而推动地下连续墙技术的全面发展。本文以岳阳洞庭湖第二大桥君山侧锚碇深基础工程为依托,对其世界罕见,国内第一的葫芦型地下连续墙进行了分析研究。首先,对所提供的地下连续墙的施工图进行详尽地研究,同时熟悉相关工程地质资料,再通过岩土工程界常用的大型计算软件FLAC3D建立完整的三维地质模型,并按照施工步骤进行数值模拟。其次,对数值模拟结果进行分析,通过得出的地表沉降,地下连续墙水平位移、纵向弯矩、环向弯矩,基地隆起等结果,得到施工过程中的最不利工况等关键数据,并整体把握结构的安全性。最后,利用数值模拟得出的结果,拟定一份完整的施工监测方案,做到降低施工安全风险,积极应对施工事故的目的,确保整个施工过程中的生命与财产安全。数值模拟分析了葫芦型地下连续墙的变形与内力,为工程设计与施工提供了理论指导和技术支持,再通过科学有效的监测方案最终保证该重难点施工工程的安全。
[Abstract]:As an excellent retaining and waterproof structure, underground continuous wall has been widely used in the world after nearly a century of development. It not only has accumulated a lot of construction experience, but also its theoretical knowledge has been systematized. Up to now, rectangular and circular underground continuous walls with simple shapes have been used skillfully in the world. However, with the pursuit of higher safety and economy of underground continuous walls, engineers have begun to adopt some special shape underground continuous wall structures. It is hoped that the relevant theories can be obtained and the construction experience will be accumulated to promote the overall development of underground continuous wall technology. In this paper, based on the deep foundation project of Junshan side Anchorage of the second Bridge of Dongting Lake in Yueyang, the paper makes an analysis and research on the hoist type underground continuous wall, which is rare in the world and the first in China. First of all, the construction drawings of underground continuous wall are studied in detail, at the same time familiar with the relevant engineering geological data, and then the complete three-dimensional geological model is established by using the large-scale calculation software FLAC3D, which is commonly used in geotechnical engineering. Numerical simulation is carried out according to the construction procedure. Secondly, through the analysis of the numerical simulation results, the key data such as surface subsidence, horizontal displacement of underground continuous wall, longitudinal moment, circumferential moment, base uplift and so on are obtained. And overall grasp the security of the structure. Finally, using the results of numerical simulation, a complete construction monitoring scheme is drawn up to reduce the construction safety risk, actively respond to the construction accident, and ensure the safety of life and property in the whole construction process. The deformation and internal force of hoist type underground continuous wall are analyzed by numerical simulation, which provides theoretical guidance and technical support for engineering design and construction, and finally ensures the safety of the heavy and difficult construction project through scientific and effective monitoring scheme.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.55;U448.25
，
本文编号：2273073
[Abstract]:As an excellent retaining and waterproof structure, underground continuous wall has been widely used in the world after nearly a century of development. It not only has accumulated a lot of construction experience, but also its theoretical knowledge has been systematized. Up to now, rectangular and circular underground continuous walls with simple shapes have been used skillfully in the world. However, with the pursuit of higher safety and economy of underground continuous walls, engineers have begun to adopt some special shape underground continuous wall structures. It is hoped that the relevant theories can be obtained and the construction experience will be accumulated to promote the overall development of underground continuous wall technology. In this paper, based on the deep foundation project of Junshan side Anchorage of the second Bridge of Dongting Lake in Yueyang, the paper makes an analysis and research on the hoist type underground continuous wall, which is rare in the world and the first in China. First of all, the construction drawings of underground continuous wall are studied in detail, at the same time familiar with the relevant engineering geological data, and then the complete three-dimensional geological model is established by using the large-scale calculation software FLAC3D, which is commonly used in geotechnical engineering. Numerical simulation is carried out according to the construction procedure. Secondly, through the analysis of the numerical simulation results, the key data such as surface subsidence, horizontal displacement of underground continuous wall, longitudinal moment, circumferential moment, base uplift and so on are obtained. And overall grasp the security of the structure. Finally, using the results of numerical simulation, a complete construction monitoring scheme is drawn up to reduce the construction safety risk, actively respond to the construction accident, and ensure the safety of life and property in the whole construction process. The deformation and internal force of hoist type underground continuous wall are analyzed by numerical simulation, which provides theoretical guidance and technical support for engineering design and construction, and finally ensures the safety of the heavy and difficult construction project through scientific and effective monitoring scheme.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.55;U448.25
，
本文编号：2273073
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