Study On The Surrounding Rock Convergence Prediction And Collapse Evolution Mechanism Of Long-span Double-arch Tunnel

Along with the highway business of our country make rapid progress, the superhighway mileage brushes the new record continuously. The tunnel make an assurance to the fast transportation , and become more and more important in the highway engineering. In the former superhighway congstruction, the tunnel design project adopts the form that the two holeses separated,to make sure the safety of the tunnel designs and construction. Recently,the former superhighway are becoming more and more width, adoption the arch tunnel which the two holes connected has become the direction of tunnel design and construction. There are many advantage about the arch tunnel which the two holes connected, such as line form flowing freely belong to the entire road design, cover the area little, the space utilization is high, avoiding the connection that between the roadbed and the tunnel entrance or between the big bridges and the tunnel entrance take much area if adopt the holes separated, link with the outside road convenience. However how to construct the arch tunnel which the two holes connected safely,how to make sure it is stable, is an important civil engineering problem which puzzled a lot of scholars recently.In this text,I have summary the characteristics ,the construction craft and the design experience about the arch tunnel which the two holes connected by summarying the construction experience domestic and international in recent years. Set up a Grey-Model to predict and analyze the rock displacement depend on the rock displacement datum in the construction of the Liu Jia Wan arch tunnel which has six driveways. And set up a mold through a Limited dollar software, imitate the spot hole room circumstance, carry on the valid number analysis,landslide calculation and deduce.Build up an useful model to predict the rock displacement and an imitation laboratory model to analyze the landslide process,point out a better construction method. It is useful to the similar engineering and someone could develop it more.