Quantitative assessment method for deformation and seismic damage of earth-rock dam based on dem digital terrain analysis
A digital terrain and quantitative evaluation technology, applied in geometric CAD, special data processing applications, design optimization/simulation, etc., can solve the difficulty of analyzing and evaluating the overall deformation of the dam body, affecting the acquisition of absolute deformation value of the earth-rock dam body, and deformation monitoring. Problems such as benchmark failure and failure
Active Publication Date: 2022-08-05
HUANENG LANCANG RIVER HYDROPOWER +3
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[0005] Purpose of the invention: In view of the destruction and failure of the original deformation monitoring benchmark in the hydropower project hub area after the strong earthquake, which affects the acquisition of the absolute deformation value of the earth-rock dam body, and the overall deformation of the dam body is difficult to analyze due to large surface deformation caused by landslides and subsidence Evaluation and other issues, the purpose of the present invention is to provide a method for quantitative evaluation of earth-rock dam deformation earthquake damage based on DEM digital terrain analysis
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[0030] Digital Elevation Model (DEM), referred to as DEM, is a dataset of plane coordinates and elevations of topographic grid points on the earth's surface, or a digital description of three-dimensional surface morphology spatial feature vectors such as longitude, latitude, and altitude, and their attribute characteristics. . Various terrain elements such as slope, aspect, and roughness can be extracted directly or indirectly from DEM.
[0031] The construction of DEM mainly adopts Regular Square Grid (RSG) or Triangulated Irregular Networks (TIN). The data storage method of TIN is more complicated than that of RSG, and its advantages are that it can change the density of sampling points and determine the location of sampling points with the complexity of terrain fluctuations, and avoid data redundancy in flat terrain, and it can also be used according to terrain feature points such as ridges. , valley lines, terrain change lines, etc. to represent digital elevation features...
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The invention discloses a quantitative assessment method for deformation and earthquake damage of an earth-rock dam based on DEM digital terrain analysis. Quantitative analysis of the dam body landslide; 4) Quantitative analysis of the overall displacement and deformation of the dam body; the present invention summarizes the main characteristics of the deformation and earthquake damage of the earth-rock dam through the statistical analysis of the earthquake damage of the earth-rock dam at home and abroad. Based on the rapid and accurate acquisition of post-earthquake damage monitoring data for earth-rock dam deformation, a high-precision DEM three-dimensional solid ground model of the earth-rock dam is constructed. Compared with the dam body model, the spatial attribute and distribution law analysis of dam body cracks, the overall quantitative analysis of dam crest and dam slope subsidence or uplift, the dam body landslide situation and subsequent impact analysis, and the dam body overall displacement and deformation quantitative analysis.
Description
technical field [0001] The invention relates to a method for evaluating the deformation and seismic damage of an earth-rock dam, in particular to a quantitative evaluation method for the deformation and seismic damage of an earth-rock dam based on DEM digital terrain analysis. Background technique [0002] According to the domestic and foreign earthquake damage investigation statistics of earth-rock dams, we can further focus on the earthquake damage types of earth-rock dams themselves, which generally include dam body cracks, dam body subsidence, dam body landslides, dam seepage, dam slope uplift or dam toe slope foot displacement. Deformation damages such as dam body cracks, dam body subsidence or uplift, and dam body landslides are the most common. [0003] Earth-rock dams are used as disaster-bearing bodies in earthquake disasters. On the one hand, the damage of earth-rock dams will cause direct economic losses; Economic losses and casualties, and at the same time, dams...
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IPC IPC(8): G06F30/13G06F30/23
CPCG06F30/13G06F30/23
Inventor 陈豪包腾飞杨明龙赵二峰杨德玮李然陈波曹学兴谭彬钟鸣徐小坤方晗卢俊
Owner HUANENG LANCANG RIVER HYDROPOWER