Influence Study Of Existing Weather Radar Tower By The Tunneling

Tunnel in the construction process, it may affect nearby buildings, especially the tunnel blasting, blasting vibration strength is greater. Thesis Shenzhen highway tunnel project for the data, in reference to the large number of existing urban tunnel construction on the surrounding buildings in the study of the impact of information, made other programs targeted comparative analysis of the construction;. Meanwhile, according to the characteristics of the tunnel, this analysis also suggested a different construction of the tunnel under the program of small clearance program; Based on the preliminary development of the construction plan, combined with the actual tunnel section form, the establishment of model, focusing on different construction schemes of meteorological radar tower on the impact of law and the characteristics of the mechanical behavior of the tunnel itself, in the comprehensive study of existing data based on the popular home and abroad by comparing the safety criteria, combined with the security of its own weather radar tower criterion, weather radar tower in ensuring safe working conditions, a reasonable construction plan.This paper first weather radar tower of tunnel construction on the impact of existing research value, domestic and international research on this issue how the status quo, to study a detailed overview of the research and the specific content of the paper and the use of specific ideas for specific details, by consulting relevant literature, it is systematic destruction of the rock blasting theory, the stress wave theory, for blasting vibration and boundary conditions to simulate how to deal with such issues as simplification of the peak load is also discussed; On the calculation and analysis of dynamic finite element method, nonlinear analysis and solution of such problems are discussed. More specific use of rock blasting damage theory, stress wave theory, dynamic finite element method based on using the MIDAS/GTS software blasting of the tunnel were two-dimensional numerical analysis are discussed in a different section excavation order case, the tunnel blasting on meteorological tower deformation, velocity, stress; In addition, dynamic analysis, based on the construction to be adopted for the construction scheme carried out in-depth analysis of the static analysis, the focus of the tunnel after excavation of rock stress, deformation and force early lining analyzed. The results of using different construction schemes in the calculation and analysis and comparison, the following points conclusion: (1) program for arch tunnel:the preliminary design of the original construction plan prepared can not meet the normal requirements of meteorological tower, it is recommended not to adopt, should change the original design of the construction program. Based on this, a lot of this analysis have been consolidated on the basis of research data, puts forward a second construction plan, and conducted in-depth analysis shows that the second construction scheme for the proposed on the basis of finalize the construction plan arch tunnel, under the action of blasting vibration impact on the weather radar tower to meet the control standards, building a safe condition.(2) for a small clear spacing tunnel:this analysis is also presented for the design of small clear space program comparison, program for small spacing, but also the two proposed construction of the corresponding program Comparative study, from the analysis of the results, the upper and lower level construction method can not meet the normal use of weather radar tower function, it is recommended not to adopt.(3) whether it is "first in the outer" or "in the first post-outside" of the excavation, topographical bias affected by the displacement of non-symmetric state showed significant vertical displacement, the surface and the vault will have a sink, the arch bottom will produce progressive uplift.