Research On Control Survey And Monitoring Technology Inside The Modern Long-and-Large Tunnel

At present, China's transportation infrastructure is in the rapid construction phase.A number of major and key projects are being constructed in succession.As an indispensable part of the projects, tunnels will also be more and more to build. Because the new measurement technologies and methods are applied in outside tunnel control survey widely, the breakthrough error caused by outside tunnel control survey has declined a lot. Thus, in tunnel control survey plays a decisive role in tunnel breakthrough.In order to increase extra observables and constraints, and improve the whole strength of in tunnel control network, the in tunnel control network of modern long and large tunnel is generally designed as traverse network. Because observables and types of observations increase and in tunnel traverse network is the form of strip network, if the data processing of in tunnel traverse network is done still based on the experience of ground control network, it can't truly reflect the actual precision, and even affect tunnel construction. Meanwhile, tunnels should be carried out deformation monitoring in order to ensure the quality and safety of tunnel construction. Traditional deformation monitoring not only seriously affects construction and efficiency in monitoring methods, but also uses artificial way to process, analyze and manage monitoring data. In order to address these issues, form the technical requirements of high efficiency, large cross and safe construction of modern long-and-large tunnel, the thesis mainly researches on control survey and monitoring technology inside the tunnel.The thesis mainly contains the following:Firstly, the existing search algorithms of annexed line are studied, and combine the reason for the big bias of angle closing error in searching for annexed line of in tunnel traverse network with the existing methods, the thesis explains that the existing methods are not applicable to the annexed line search of in tunnel traverse network. Thus, the thesis puts forward a new search algorithm of annexed line based on direction precision information to solve the problem above.Secondly, the thesis respectively computes the observations of in tunnel traverse network from four tunnels in different adjustment ways.After analyzing the principles of the different adjustment ways and comparing the results, the conclusion that the way of Helmert Different Weight is more suitable for the data processing of in tunnel traverse network.Then, the related contents of tunnel deformation monitoring are summarized. Form analyzing the law of stress redistribution and release of tunnel surrounding rock, the thesis puts forward a new non-contacting monitoring method of tunnel surrounding rock by free station of total station, when datum points or work points don't exist.At last, according to the new method, as well as the figures and functions of data processing software of tunnel deformation monitoring at home and abroad, the thesis develops software, namely "TDM Data Processing Software", which realizes the automation, programming and informatization to process, analyze and manage the data of tunnel deformation monitoring.