Study on TMTD Statistical Model of Arch Dam Deformation Monitoring

Abstract The traditional monitoring statistical model of arch dam deformation is established based on early average temperature as the temperature factors, but its extension forecast function is poorer. Based on the analysis of the shortcomings and causes of the traditional monitoring statistical model, this paper has studied a new deformation statistical model (called TMTD statistical model). In TMTD statistical model, the temperature factors use mean temperature T m and linear temperature difference T d in the direction of the thickness of horizontal sections on arch dam. T m and T d are obtained by theoretical calculation, so it can better reflect and forecast changes of arch dam temperature field. The contrast of project cases in terms of forecast effect between two models has been presented, and the contrast shows, TMTD statistical model has significant superiority in terms of extension forecast of arch dam deformation.