隧道动态施工与安全稳定评判研究

发布时间：2018-05-15 20:45

本文选题：隧道 + 新奥法　；参考：《重庆交通大学》2015年硕士论文

【摘要】：随着交通向崇山峻岭、深水离岸的延伸,隧道在整个交通运输行业隧道的优势将日益明显。在新奥法出现以前的很长一段时间里,很多隧道都是依靠着以往施工的案例即类比法进行施工。因为隧道工程在施工中的特殊性,施工情况在未开挖时大部分是不能够预见的,这就导致此类工程仅凭以往施工的经验和案例,施工必定有着一定的盲目性。自从新奥法出现之后,其在现实使用中首要的一点便是及时监控,就是在隧道开挖的同时,将其所收集的围岩信息放入其一直不断变动的设计和施工的过程中,同以前的施工方法相比有了本质的跨越。隧道在不断挖进的进程中,利用地质雷达进行超前地质预报,反射信号通常呈现多种解决方案。研究发现,在解释图像时需把图像和掌子面地质素描紧密结合,并参照同一隧道的原有结果,进而形成了一种多样全面的超前地质预报。本文选取了重庆渝中连接隧道作为研究对象,文中就隧道施工中监控量测的运用作了较详细的论述。在分析总结现有的隧道施工和监控理论与技术的基础上,将现场调查、现场地质考察、现场监控量测所得到的信息进行全面的分析,根据不同施工阶段,掌握隧道施工在不同工况下的围岩动静和支撑结构体系在不同条件下的施工阶段的应力分布特征及隧道的应力状态,并在现有支护条件下,分析隧道围岩位移场、应力场的分布特征以及随施工进行而发展变化的围岩环境。监测数据和分析结果及时反馈给设计和施工,同选择的设计参数进行对比,不断改变原有的支护参数和施工方法,使项目更加安全、经济并缩短施工周期。通过工程实例,进一步深化了隧道“信息化设计施工”的理念和应用,进而为实现全方位、动态的隧道信息化施工监测提供了参考。
[Abstract]:As the traffic extends to the mountains and deepwater offshore, the advantage of the tunnel in the whole transportation industry will become more and more obvious. For a long time before the appearance of the New Olympic method, many tunnels were constructed by analogy. Because of the particularity of tunnel engineering in the construction, most of the construction situation can not be foreseen when it is not excavated, which leads to this kind of engineering only based on the past construction experience and cases, the construction must have a certain degree of blindness. Since the emergence of the New Olympic Law, the most important thing in its practical use is to monitor and control in time, that is, to put the surrounding rock information it collects into the process of its constantly changing design and construction while the tunnel is being excavated. Compared with the previous construction method, there is an essential leap. In the process of tunneling, geological forecast is carried out by using geological radar, and the reflected signal usually presents various solutions. It is found that it is necessary to combine the image with the palmface geological sketch when interpreting the image and refer to the original results of the same tunnel, thus forming a kind of comprehensive geological forecast. This paper selects Chongqing Yuzhong Link Tunnel as the research object, and discusses in detail the application of monitoring measurement in tunnel construction. On the basis of analyzing and summarizing the existing theory and technology of tunnel construction and monitoring, the information obtained from field investigation, field geological investigation and field monitoring measurement are comprehensively analyzed, and according to different construction stages, To grasp the stress distribution characteristics of surrounding rock and supporting structure system under different conditions in tunnel construction and the stress state of tunnel, and analyze the displacement field of tunnel surrounding rock under the existing supporting conditions. The distribution characteristics of stress field and surrounding rock environment which develop with construction. The monitoring data and analysis results are fed back to the design and construction in time, and compared with the selected design parameters, the original supporting parameters and construction methods are constantly changed, which makes the project safer, more economical and shortens the construction period. Through engineering examples, the paper further deepens the concept and application of "information design and construction" of tunnel, and then provides a reference for realizing the omnidirectional and dynamic monitoring of tunnel information construction.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U456.3

【共引文献】