Visual Calculation Of Internal Force And Deformation Of Tunnel Lining

The tunnel engineering was widely used the domestic engineering construction with the development of infrastructure construction sush as urban facilities,water conservancy,transportation in China.The design theory of tunnel lining structure has been developed more than 100 years.Various calculation methods have emerged in the meantime.Boundary value method —— numerical method based on structural mechanics has been widely used in engineering.It's not necessary to assume the distribution of the elastic resistance of the surrounding rock in the boundary value method.In stead of the assumption,boundary value method judges the elastic resistance by the radial displacement of the lining.It is closer to engineering practice compared with other analytical methods.The paper will use the boundary value method designing the GUI to calculate internal force deformation of lining of various sections of tunnel(Shield tunneling method and drilling blasting method)by the MATLAB software.Then the paper compares the calculation results with the existing commercial software of boundary value method and other scholars' calculation methods to verify the correctness of the program in the paper.The main contents of this paper are as follows:(1)The peper introduces the principle of the boundary value method and uses the boundary value method to design the GUI of the calculation of internal force and deformation of the lining of circular,horseshoe and arched section tunnel.Then it verifies the correctness of the GUI by the example.(2)One of the disadvantages of the boundary value method is that the lining is assumed to be impermeable structure.So the results of the high pressure tunnel lining calculated by the boundary value method are always large.The body force theory of water load holds that the concrete lining will crack and break away from the surrounding rock,and the inner water pressure acts on the lining and surrounding rock in the form of seepage pressure under hidh water pressure.So the Surrounding rock takes up the equivalent of the most of the water pressure.In this paper,the boundary value method and the body force theory of water theory are combined to compile the GUI of the calculation of internal force and deformation of the lining of hydraulic high pressure tunnel with a calculation example.(3)The previous boundary value method is used to calculate the continuous and uniform whole lining structure.In view of the fact that there is no relevant literature adopt boundary value method calculate internal force deformation of lining of composite structure composed of segment and joint,this paper puts forward two kinds of joint processing method originally and achieves the calculation of shield tunnel lining by boundary value method.Then the paper design the GUI of he calculation of internal force and deformation of shield tunnel lining.