Study On Environmental Protection Of The Expressway Subgrade Excavation In The Limestone Mountainous Area

With the development of social economy, the country pay attention day by day to the environmental protection work, considering from function simply of the planning,design, construction and operation of expressway is far from people's requirement of life already, planning and design and construction and operation of the expressway should reflect the human-oriented thought with sustainable development. This thesis, according to limestone environmental characteristic and characteristic of construction of highway of mountain area of limestone, sets out in excavating from the road bed of the angle of environmental protection, according to trying not to excavate, how to reduce to excavate, how to reduce and excavate the impact on surrounding environment of the course, how to go on the expressway view and ecological environment and how to carry on environmental quality resume ,we employ theories such as engineering of traffic , rock soil engineering , traffic psychology , traffic aesthetics , operations research ,etc. we have excavated environmental protection theory and method and carried on research to the mountain area expressway road bed of limestone systematically, propose the road bed to excavate and optimize, slope protect , discard cubic meter of earth and stone deal with , natural river system recuperate recovery , view environmental recovery , environmental quality resume theory system of appraising etc.. These theory and method foundation of system offer the basic thinking to promote limestone mountain area sustainable development of expressway.Particularly four following respect problems of main research of this thesis:First, excavating and optimizing of the road bed and the slope protect, on the basis of influence factor analysis and the slope design principle by the expressway of mountain area of limestone, we excavate the model of optimizing after putting forward the road bed which is suitable for the expressway of mountain area of limestone, through employ this optimize model, we can reduce the amount of road bed excavate, thus maximum reducing slope excavate destruction to environment and pollute; According to limestone mountain area expressway characteristic of the cutting slope , we use the law of finite element and RMR of revision carry on stability analyze and appraise to their side slope; Combine the limestone rock body characteristic of mountain area , we have analyzed the corresponding side slope safeguard procedures.Second, the discard of cubic metre of earth and stone and recuperate and resume of the natural river system. Allocate the principle of the basis of the cubic metre of earth and stone, combine the characteristics of limestone geology of mountain area and ecological environment, we set up the mathematical model of the linear programming, which is suitable for limestone mountain area large system cubic metre of earth and stone of expressway, meanwhile we put forward systematic thinking of treatment and method through the remaining cubic metre of earth and stone after allocating, at the same time, we give the protective measure on abandon soil field and fetch earth field about environmental; making the discussion on medical treatment of natural river system and underground river system of the slope recover.Third, the slope view resumes by the cutting. The slope view is the important component of the view of the highway, it is a main content studied in environmental protection of the expressway. After describing view intension of the expressway and composition, analyzed the...