A method for formulating the center line of arch dam

Abstract

The invention discloses a method for drawing up the center line of an arch dam. Firstly, the initially-drawn-up center line of the arch dam is obtained through a traditional computing method, then theinitially-drawn-up left (right) bank chord length Lsli (Lsri) is obtained through arch rings of different elevations, the function relationship curve of the elevation values of various layers of archrings and the initially-drawn-up left (right) bank chord length Lsli (Lsri) is obtained in a fitting manner through the principle of least squares, and the optimal center line position of the arch dam is obtained by computing the arch dam center offset distance obtained when the left and right bank computing chord length deviation under the elevations of the arch rings tends to be the minimum. According to the method, it is guaranteed that the left banks and the right banks of the arch rings tend to be symmetric, and the repeated and complex manual trial process is avoided.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering applications, and in particular relates to a method for drawing up the center line of an arch dam. Background technique [0002] In the shape design of arch dams, the determination of the centerline of the arch dam is of great significance. The conventional design method is to find the lowest point of the rock surface along the axis of the dam. If the bottom of the valley is flat, the center of the flat part can be taken as the arch crown beam. Location. The vertical plane passing through the line connecting the crown beam and the center of the top arch is called the reference plane of the arch dam, and the horizontal projection of the reference plane of the arch dam is the centerline of the arch dam. [0003] First of all, this method cannot guarantee that the left and right banks of the arch rings of each layer tend to be symmetrical, and according to the "A...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a drafting method for the centerline of an arch dam, construct a mathematical model based on practical engineering problems, determine the centerline of the arch dam by using the principle of least squares method and a mathematical programming solution method, and ensure the accuracy of each layer of arch rings. The left and right banks tend to be symmetrical, avoiding the stress concentration phenomenon caused by the asymmetry of the arch rings of the left and right banks; at the same time, ensuring the smoothness and convexity of the connection between the arch rings of each layer, avoiding the process of repeated trial calculation and adjustment

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