Numerical Analysis Of Rock Pressure And Lining Safety On The Unsymmetrical Loading Tunnel Due To Different Geology

In the mountain tunnel construction process, usually the tunnel will pass through the Complex Rock mass, unsymmetrical loading tunnel belongs to one of the complex geology. It is a difficult problem that the safety of the rock pressure and the lining.For the research of unsymmetrical loading tunnel, there are many results on terrain unsymmetrical loading tunnel and geological bedding unsymmetrical loading tunnel, but for the research of unsymmetrical loading tunnel due to different geology is less. The paper carried out numerical simulation on the unsymmetrical loading tunnel due to different geology by ANSYS.The paper first analyzed the contributing factors, distinguishing methods and study status of the unsymmetrical loading tunnel. And the calculation methods of the pressure of surrounding rock masses is discussed in this thesis.The paper studies method of the rock pressure in different geology at the angle 90°of the rock dividing line and ground .The numerical simulation is proceeded to the behavior of mechanics excavation in the different geology in one tunnel. The paper mainly aims at different geology in two sides of one tunnel :(1) The tunnel passes through the situation ofⅠandⅡ,ⅡandⅢ,ⅢandⅣ,ⅣandⅤ, in the situation of different angle between the interface and ground, we sum up some rules of the rock pressure and the stress of the lining.(2) Analysing the first and third stress Jay out the character of the rock pressure and the stress of the lining . from another angle .(3) Calculating the safety modulus of the initial lining , get the safety of the initial lining in the condition of different geology .(4) Analysing the internal force of the lining and collocating the account of the reinforcing bar. It can offer the reference to the construction of the similar Engineering and the standardized design of the realway tunnel in the future .