Method for drawing up center line of arch dam

A centerline and arch dam technology, which is applied in the field of drafting the centerline of arch dams, to achieve the effect of avoiding the manual trial calculation process

Active Publication Date: 2018-05-22
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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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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  • Method for drawing up center line of arch dam

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Embodiment Construction

[0028] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0029] Such as figure 1 As shown, the arch dam height is determined according to planning, hydrological, and geological data, and the arch dam is divided into several layers of arch rings in the height direction13. Combined with the topographic and geological data of the dam site area, the position of the dam axis is initially estimated and the geology is cut along the dam axis. The section, combined with the geological data and the geologist’s suggestion, initially draw up the excavation depth of each layer of the arch ring 13; connect them in sequence according to the preliminary excavation depth of each layer of the arch ring 13, which is the initial plan of the arch dam downstream elevation view Excavation boundary line 11; according to the conventional design method introduced in the background technology, that is, to find the lowest point of the rock sur...

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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 application, and specifically relates to a method for drawing up the centerline of an arch dam. Background technique [0002] In the design of the arch dam shape, the determination of the center line of the arch dam is of great significance. The conventional design method is to find the lowest point of the rock surface along the dam axis. For example, the bottom of the river valley is flat. The center of the flat part can be used as the arch crown beam. position. The vertical plane connecting the arch crown beam and the center of the top arch is called the arch dam reference plane, and the horizontal projection of the arch dam reference plane is the arch dam centerline. [0003] First of all, this method cannot guarantee that the left and right banks of each layer of arch rings tend to be symmetrical. According to the "Arch Dam Design" (U.S. Bureau of Reclamation), w...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/12
Inventor 房彬陈海坤居浩李刚高传彬李波何建峰
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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