沉管隧道贯通测量导线精度分析

发布时间：2018-01-26 21:47

本文关键词： 沉管隧道贯通测量沉放测量最终接头　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：我国沉管隧道技术研究起步较晚,虽然经过最近几十年的发展,已成功修建了 10余座沉管隧道,但总体而言,与世界发达国家相比,我国的沉管技术仍相对落后。在此期间,国内一些高校和科研机构在沉管隧道测量领域已经取得了一定的研究成果,成功指导并修建了一批沉管隧道,但这些沉管隧道大多规模较小,对贯通测量要求较低。目前,国内针对大型沉管隧道贯通测量的研究微乎其微,但沉管隧道贯通测量工作是整个测控系统中的重要组成部分,也是关系到整个沉管隧道能否顺利贯通的重要环节。一方面,贯通测量通过对已沉管节进行洞内测量,可指导后续管节的沉放工作;另一方面,对于预制型最终接头的沉管隧道,只有通过贯通测量,得到最终接头模型,才能进行最终接头的预制及安装,保证整个沉管隧道工程顺利贯通。本文将沉管隧道贯通测量分为洞内导线测量和最终接头测量两个部分。对于洞内导线测量部分:首先,提出了几种大致可行的测量方案;然后,通过对测角测边精度、导线边长、导线网型和加测陀螺方位角等几个因素进行分析研究,总结出各项因素对沉管隧道横向贯通误差的影响值;最后,综合分析提出了对于不同长度的沉管隧道应选择哪一种洞内导线测量方案,即能使其横向贯通误差满足设计要求。对于最终接头测量部分:主要研究分析预制型最终接头,首先提出了四种获取最终接头预制模型参数的测量方法,分别是洞内导线法、测量塔法、三维激光扫描法和声纳法;然后对各方法的测量原理及过程进行阐述,并对其测量精度进行分析;最后总结出各方法的优缺点及适用范围,可为工程应用提供参考。本文首先介绍了沉管隧道的历史及技术发展、国内外针对沉管隧道沉放测量及贯通测量的研究现状;接着,通过对实际工程的研究学习,总结了沉管隧道建设过程中所需的各项测量工作,并分别对各环节测量原理和方法进行阐述;然后,重点探讨了贯通测量导线精度分析;最后编写了满足课题实验所需的测量数据处理程序,并通过实例验证其可行性。通过本文的研究,不仅能够对于测量人员学习了解沉管隧道测量知识提供参考,而且,在沉管隧道工程测量中,也可为施工人员制定贯通测量技术方案提供参考,同时,该研究对于沉管隧道贯通测量的进一步研究具有一定的参考价值。
[Abstract]:Although more than 10 immersed tunnels have been successfully built in recent decades in China, the technical research of immersed tunnels is relatively late, but in general, compared with the developed countries in the world. During this period, some universities and scientific research institutions in China have made certain research achievements in the field of pipe sinking tunnel survey, and have successfully guided and built a number of immersed tube tunnels. However, most of these immersed tunnels are small in scale and low in the requirements of through-through measurement. At present, there is very little research on the through-through measurement of large immersed tunnels in China. However, the penetration measurement of immersed tunnel is an important part of the whole measurement and control system, and it is also an important part of whether the whole immersed tunnel can be smoothly through. On the one hand. Through the measurement of the submersible pipe knots in the hole, can guide the subsequent pipe joint sinking work; On the other hand, the final joint model can be used to preform and install the final joint only through the through measurement for the immersed tunnel of the prefabricated final joint. In this paper, the penetrating measurement of immersed tunnel is divided into two parts: the traverse measurement in the hole and the final joint measurement. The first part is the traverse survey in the tunnel. Several feasible measurement schemes are put forward. Then, through the analysis and study of several factors, such as angle measuring precision, traverse side length, traverse network type and gyroscope azimuth angle, the influence value of each factor on the transversal transfixion error of immersed tunnel is summarized. Finally, a comprehensive analysis is made on which traverse measurement scheme should be chosen for the tunnel with different length. That is to say, the transversal transversal error can meet the design requirements. For the final joint measurement part: the main research and analysis of the prefabricated final joint, first proposed four measurement methods to obtain the parameters of the final joint prefabricated model. Three dimensional laser scanning method and sonar method were used respectively. Then the measurement principle and process of each method are expounded, and its measuring accuracy is analyzed. Finally, the advantages and disadvantages of each method and the scope of application are summarized, which can provide a reference for engineering application. Firstly, the history and technical development of immersed tube tunnel are introduced in this paper. The present situation of research on sinking and pipe-sinking measurement of tunnel at home and abroad; Then, through the research and study of the actual project, the paper summarizes the measurement work needed in the construction of the immersed tunnel, and expounds the measuring principle and method of each link respectively. Then, the accuracy analysis of the traverse is discussed. Finally, the program of measuring data processing is written to meet the need of the subject experiment, and its feasibility is verified by an example. The research in this paper can not only provide reference for surveyors to learn and understand the surveying knowledge of immersed tunnel. In addition, in the engineering survey of immersed tunnel, it can also provide a reference for the constructors to formulate the technical scheme of through-through survey. At the same time, this study has certain reference value for further research on the penetrating measurement of immersed tunnel.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U459.5;U452.1

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