Evaluation Of The Tunnel Engineering Construction Scheme In High Altitude

From high altitude tunnel construction situation and common construction method to summarize, consult the relevant literature, exploring study, construction scheme of high altitude tunnel construction theory are summarized, and then select and introduce construction scheme evaluation method. Finally, national highway 214 republican to yushu highway jiang road as the engineering background, the tunnel of high altitude tunnel engineering construction scheme using numerical simulation, analytic hierarchy process (ahp) price research, in order to get the most suitable for high altitude tunnel engineering construction scheme. This article mainly from the following several aspects:? Widespread access to relevant data, and summarizes the construction of tunnel engineering in high altitude development present situation, research methods and common construction scheme in construction and the most high altitudes theory support for evaluation of tunnel engineering construction.? Overview of the construction of high altitude tunnel theory, this paper introduces the basic concepts and high altitude tunnel construction characteristics, and according to the characteristics of frozen soil and groundwater classification, analysis of the mechanical characteristics of tunnel excavation, summary introduction high altitude construction process and the process of tunnel construction scheme.? Summarizes construction schemes evaluation standard, evaluation method on construction schemes for selection and introduction, including the numerical simulation to the basic theory of analytic hierarchy process (ahp), operation process and detailed steps of evaluation.? Introduce construction scheme selection principles of evaluation index and a preliminary selection, modeling using numerical analysis method of different construction schemes, simulating the construction process and quantitative evaluation index, index quantification value to different construction schemes are obtained.? Use cases in this paper, selection of construction scheme evaluation method for calculus, introduces jiang road tunnel engineering survey, design, by using numerical simulation, analytic hierarchy process (ahp) for construction scheme evaluation, get high elevation level IV surrounding rock tunnel best construction scheme.