大跨度隧道断层破碎带围岩衬砌荷载作用与变形特性研究
发布时间：2018-07-13 11:55
【摘要】：随着交通事业的迅速发展，国内外公路大跨度隧道的建造不断增多，当前对大跨度隧道的相关研究较少，，特别是大跨度隧道断层破碎的施工经验并不丰富，由于隧道跨度增大，将会影响到围岩稳定、支护形式等工程问题。所以在隧道建设中，对受力比较复杂的大跨度隧道断层破碎带处的围岩衬砌荷载作用与变形特性的研究具有重要的理论和工程意义。 本文结合科研项目“南方山区公路隧道施工安全保障与结构长期稳定技术研究”，以广西某大跨度隧道为依托工程，首先，在隧道测试断面处埋设压力盒、表面应变计、钢筋计以及混凝土应变计等测试元件，对大跨度隧道围岩衬砌结构进行监控，通过对比普通断面与断层破碎带处断面测试结果，得出了断层破碎带围岩条件下大跨度隧道围岩衬砌结构荷载分布与变形特性以及初衬与二次衬砌结构分担荷载比。 其次，利用有限元软件ANSYS对大跨度隧道断层破碎带围岩区域进行数值模拟，分析了大跨度隧道断层破碎带开挖结束之后和二次衬砌施作后围岩、初期支护结构和二次衬砌的结构荷载作用与变形特性。 最后，依据现场元件测试和有限元数值模拟分析结果，总结了大跨度隧道断层破碎带围岩衬砌荷载作用与变形特性，可以对隧道施工进行指导和反馈，同时也为今后有关类似地质条件下的隧道建设提供一定的施工和设计经验。
[Abstract]:With the rapid development of transportation, the construction of highway long-span tunnel is increasing at home and abroad. The research on long-span tunnel is less at present, especially the construction experience of long-span tunnel fault breaking is not rich, because of the increase of tunnel span. Will affect the stability of surrounding rock, supporting form and other engineering problems. Therefore, in the tunnel construction, it is of great theoretical and engineering significance to study the load and deformation characteristics of surrounding rock lining in the fault fracture zone of large-span tunnel. In this paper, combining with the scientific research project "Safety guarantee and long-term structural stability technology study of highway tunnel construction in southern mountainous area", based on a large-span tunnel in Guangxi, first of all, a pressure box and a surface strain gauge are laid at the test section of the tunnel. The steel bar gauge and concrete strain gauge are used to monitor the surrounding rock lining structure of the long span tunnel, and the results are compared between the common section and the fault broken zone. The load distribution and deformation characteristics of surrounding rock lining structure of long span tunnel under the condition of fault broken zone surrounding rock and the load sharing ratio between primary lining and secondary lining structure are obtained. Secondly, using the finite element software ANSYS to simulate the surrounding rock region of the fault fracture zone of the long span tunnel, the surrounding rock is analyzed after the excavation of the fault broken zone of the long span tunnel and the secondary lining construction. Structure load and deformation characteristics of primary supporting structure and secondary lining. Finally, based on the results of field component test and finite element numerical simulation, the load and deformation characteristics of surrounding rock lining in fault fracture zone of long span tunnel are summarized, which can guide and feedback the tunnel construction. At the same time, it also provides some experience of tunnel construction and design under similar geological conditions in the future.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U456.3
本文编号：2119291
[Abstract]:With the rapid development of transportation, the construction of highway long-span tunnel is increasing at home and abroad. The research on long-span tunnel is less at present, especially the construction experience of long-span tunnel fault breaking is not rich, because of the increase of tunnel span. Will affect the stability of surrounding rock, supporting form and other engineering problems. Therefore, in the tunnel construction, it is of great theoretical and engineering significance to study the load and deformation characteristics of surrounding rock lining in the fault fracture zone of large-span tunnel. In this paper, combining with the scientific research project "Safety guarantee and long-term structural stability technology study of highway tunnel construction in southern mountainous area", based on a large-span tunnel in Guangxi, first of all, a pressure box and a surface strain gauge are laid at the test section of the tunnel. The steel bar gauge and concrete strain gauge are used to monitor the surrounding rock lining structure of the long span tunnel, and the results are compared between the common section and the fault broken zone. The load distribution and deformation characteristics of surrounding rock lining structure of long span tunnel under the condition of fault broken zone surrounding rock and the load sharing ratio between primary lining and secondary lining structure are obtained. Secondly, using the finite element software ANSYS to simulate the surrounding rock region of the fault fracture zone of the long span tunnel, the surrounding rock is analyzed after the excavation of the fault broken zone of the long span tunnel and the secondary lining construction. Structure load and deformation characteristics of primary supporting structure and secondary lining. Finally, based on the results of field component test and finite element numerical simulation, the load and deformation characteristics of surrounding rock lining in fault fracture zone of long span tunnel are summarized, which can guide and feedback the tunnel construction. At the same time, it also provides some experience of tunnel construction and design under similar geological conditions in the future.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U456.3
【参考文献】
相关期刊论文 前10条
1 陈秋南,张永兴,刘新荣,包太;连拱隧道的设计理论与动态施工力学研究[J];地下空间与工程学报;2005年01期
2 丁文其;谢东武;严宗雪;曲海锋;;动态监测及其在四车道公路隧道施工中的应用[J];地下空间与工程学报;2007年01期
3 靳晓光,王兰生,李天斌,徐进,徐林生;二郎山隧道洞壁位移应力测试与信息化施工[J];地质灾害与环境保护;1999年02期
4 王明年,何川,翁汉民,李志业;3车道隧道模型试验研究及有限元分析[J];公路;1995年09期
5 宫成兵,张武祥,杨彦民;大断面单洞四车道公路隧道结构设计与施工方案探讨[J];公路;2004年06期
6 王应富,蒋树屏,张永兴;四车道隧道动态施工力学研究[J];公路交通科技;2005年S1期
7 赖金星;吴明先;;大断面公路隧道施工技术[J];施工技术;2006年02期
8 杨晓华,谢永利;公路隧道坍方综合处治技术[J];长安大学学报(自然科学版);2004年01期
9 杜炜平,古德生;隧道通过断层区的力学特性与技术对策研究[J];西部探矿工程;2000年05期
10 谭光宗;市区浅埋大跨度公路隧道施工技术[J];西部探矿工程;2002年05期
本文编号：2119291
本文链接：https://www.wllwen.com/kejilunwen/jiaotonggongchenglunwen/2119291.html
