Analysis And Study On Optimization Of Deep Cutting And Short Tunnel Scheme

Two-thirds of the territory of our country are mountainous regions, so theconstruction of highway mountainous regions is very important, especially after theimplementation of China’s Western Campaign.The optimization of deep cutting andshort tunnel scheme involves many factors,it composites plant physiology, ecology, civilengineering, geotechnical engineering and so on.It not only includes strength and safetyf engineering structures， but also involves social benefit, economic benefit andecological environmental problems. In the practical engineering，how to choose a safety,reasonable cost and little impact on the ecological environment scheme is not mature,sothis thesis uses theoretical guidance,fuzzy comprehensive evaluation, analytiealhierarehy process and ecological environment of monetary to analysis and study onoptimization of deep cutting and short tunnel scheme. Based on the “twelfth five-year”national science and technology support plan subject, this article will combineChongqing Jinshan avenue west in Huagou tunnel engineering’s geological andenvironmental conditions to analysis and study on optimization of deep cutting andshort tunnel scheme, especially considering the problem of ecological environmentvalue.The main jobs are follows:(1) Collect and read a lot of flies related to deep cutting and short tunnel,summarize the basic concept of deep cutting and short tunnel, and introducecharacteristics and the Construction of technology of each scheme. Emphasize the largedamage to the ecological environment of deep cutting; in addition deep cutting slopehas much hidden danger. So this thesis puts forward short tunnel substitute deep cuttingis very reasonable. According to the engineering, estimate the critical excavation depthH0.(2) Analysis the value of the ecological environment in optimization of deepcutting and short tunnel scheme, and consider the influence of ecological environmentvalue of scheme optimization. According to the Chongqing Jinshan avenue west inHuagou tunnel for example and the characteristics of the hypothesis cutting scheme, thisthesis selects some reasonable index system for optimization of deep cutting and shorttunnel scheme, from four aspects of economy, technology, ecology and the environmentthrough the fuzzy comprehensive evaluation and analytieal hierarehy process to select fuzzily.(3) Through the ecological environment of monetary，converting the effection ofproject construction on the ecological environment to the form of money takes part inthe scheme optimization, This method solves the fuzzy optimization problems ofecological environment factors. According to the weight of the engineering cost and theenvironmental value loss through the minimum environment cost method determinesthe evaluation cost, according to the evaluation of cost to determine the optimal scheme.Through the results of two methods, obtain the theoretical basis of optimization of deepcutting and short tunnel scheme.