Research Of Optimum Shape Design And Rapid Construction Method For Wugang Ramp

With the development of mining industry, meanwhile, in order to respond to the stratege of sustainable delelopment, traditional surface mining can not demand for the economic development and environmental protection. At present, it keeps a speed of 10 meters per year in deep mining,as a result, it is an inevitable tendency that surface mining will transfer into deep. In this aspect, the shapes of roadway are always upright-wall in our country. These shapes are suitable for many situations, but it can not satisify soft fractured rock conditions. Therefore, this paper mainly utilizes cinquefoil arch in highway tunnel into roadway in order to analyze diffirent stress characteristics between upright-wall and curved-wall to combine with Wugang ramp. A new more economic and more reasonable optimum shape for tunnel will be presented by theoretical analysis and numerical simulation of curved-wall. Furthermore, it will analyze the stress feature and mechanical properties variation law by numerical simulation of bench reservation core soil method. Meanwhile, it produces other two excavation methods so as to analyze the stress feature and mechanical properties variation between the two motheds. Besides that, this paper also hopes put forward a more effective excavation method through comparing with the bench reservation core soil method. It does not only provide a way to solve the problem of Wugang ramp, but also supply valuable and useful guidances and references for similar projects.