Methodology And Application Of Dynamic Simulation And Information Management For Multi-arch Tunnel Construction

The methodology of dynamic simulation and information management formulti-arch tunnel construction are deeply studied in the thesis, and case studies aredone with the project of Dalaodi tunnel and Xiayangkeng tunnel of the Gandinghighway. The simulation and optimization of the construction process are realized,and the construction's information can be management scientifically and can be usedeffectively. The scientific, intuitionistic, and timely reference and guidance formulti-arch tunnel construction are brought out. Summarily, the main contents andachievements of this thesis are listed as following: Firstly, according to the characteristics of the multi-arch tunnel construction, themethods of dynamic visual simulation and optimization for multi-arch tunnelconstruction, including the modeling for the whole construction process's dynamicsimulation, the simulated computing and optimal analysis method for the constructionprocess and the 3-D visual techniques for the simulated construction process arepresented. The dynamic visual simulation software for multi-arch tunnel construction,named ESAS-DLD1.0, is developed. And case study is executed with Dalaodi tunnelof Ganding highway. Therefore, reasonable equipment sets, construction scheduling,critical path, construction intensity and other important construction parameters canbe got, and the construction schedule and the dynamic construction layouts can bedescribed visually with 3-D way, and then the references for the constructionplananddesign of the complex multi-arch tunnel can be achieved. Secondly, the construction schedule forecast and control methods of themulti-arch tunnel based on real time simulation are studied. The method of the realtime simulation and forecast, and the real time control method based on dynamicsimulation for the multi-arch tunnel construction process are presented. And then acase is studied with Dalaodi tunnel project. Not only the total time duration for theproject and the deviation between the planed and the practical construction schedulecan be forecasted quantitatively in real time, but also the most reasonable controlmeasures can be obtained with the comparison among the alternatives based on realtime construction simulation. Thirdly, combining with the Dalaodi tunnel project, the monitor andmeasurement scheme of the multi-arch tunnel are deeply studied. According todifferent wall rocks, the selected test sections are monitored in particular, and theregular monitor and measure for the whole tunnel is executed. On the base of that, theinformation treatment and analysis is given to provide references for the project'ssecurity construction. Fourthly, the method for forecasting surrounding rock deformation based on RBF(Radial Basis Function) neural networks is brought out. According to the realinformation from Dalaodi tunnel monitor and measurement, the surrounding rockdeformation of the tunnel project is forecasted. This method can overcome thedifficulty of traditional multi-variable regressionmethods to represent the surroundingrock deformation curve with inflexion point. Furthermore, the RBF neural networkshave more quick converge speed than BP neural networks. Fifthly, the geoinformation 3-D modeling method for multi-arch tunnel's projectbased on the NURBS technique is presented. Then the visual analysis of thegeoinformation is realized. And the function of visual analysis of geoinformation onthe management of multi-arch tunnel construction is discussed. Then a case is studiedwith Xiayangkeng tunnel project. Therefore, with the intuitionistic analysis on thegeological situation along with the tunnel, and by the feedback analysis, thegeoinformation forecast can be got in time, so the tunnel design and real constructioncan be more suitable to the real geological situation.