His Hot Ha Tal Hydropower Station Tunnel Lining Force Analysis

Along with our country economy fast development, the demand for energy isbecoming more and more big, to vigorously develop hydropower. Diversion tunnel asan indispensable important part of hydropower station, power generation, waterdiversion tunnel lining structure stress distribution and stability of it has been animportant subject of our research. With the rapid development of China’s waterresources and hydropower engineering, diversion tunnel hole body length is longer andlonger, buried depth is becoming more and more deep, the engineering geologicalcondition is more and more complex, this is for the analysis of the force of the diversiontunnel lining structure has more stringent requirements.This article to heat the tal hydropower station diversion tunnel as the background,main research stress characteristics of different diversion tunnel cross-section lining andcircular diversion tunnel lining stress characteristics under different working conditions.The standard main work is as follows:(1)based on the study of a large number of domestic and foreign hydraulic tunnellining structure, on the basis of the finite element method was adopted to establish thereasonable qi thermal ha tal of hydraulic tunnel of a hydropower station model,calculation of load under the action of forces on the tunnel lining, the analysis ofcalculation results were reasonable.(2)the hydraulic tunnel with circular cross-section and horseshoe cross section,using ANSYS finite element software to establish his hot ha tal hydropower stationdiversion tunnel section is circular and the two-dimensional horseshoe tunnel model,through the calculation of the finite element solution, these two section lining stressdistribution are obtained. Comparative analysis of both stress distribution, we can seethat circular section on stress distribution of tunnel lining is evener, no obvious stressconcentration phenomenon. Horseshoe cross section on stress distribution of tunnellining is not uniform in particular, in the arch foot on either side of the bottom haveobvious stress become larger, here appeared the phenomenon of stress concentration. Itis very bad for safe operation of the project.(3) of the hydraulic tunnel of circular cross section by concrete lining, usingANSYS finite element software to simulate different conditions of surrounding rock, the force of the lining structure in working condition. Analysis of all kinds of different typesof surrounding rock and lining thickness, under different working conditions, the liningstructure stress and deformation conditions.