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Earth and rockfill dam complex borrow pit excavation volume calculation method based on grid subdivision algorithm

A grid subdivision and calculation method technology, applied in the field of earth-rock dam construction, can solve problems such as uneven mining surface and bottom surface, heavy post-processing workload, encrypted measurement section, etc., to shorten calculation time, improve calculation accuracy, high efficiency effect

Active Publication Date: 2021-04-30
CHINA THREE GORGES UNIV
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AI Technical Summary

Problems solved by technology

Under normal circumstances, the shape of the soil material field is different, and the shape of the mining surface and the bottom surface is extremely uneven. The traditional earthwork measurement method is mainly obtained by measuring the area of ​​several typical sections, and then multiplying the section spacing to accumulate. This method requires To measure the data of multiple sections, for sections with complex excavation shapes, it is necessary to encrypt the measurement sections, the workload of post-processing is relatively large, and there are often certain errors due to the influence of section selection; for stockyards excavated by steps , the steps are relatively high, and there are still certain difficulties and dangers in the traditional measurement method

Method used

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  • Earth and rockfill dam complex borrow pit excavation volume calculation method based on grid subdivision algorithm
  • Earth and rockfill dam complex borrow pit excavation volume calculation method based on grid subdivision algorithm
  • Earth and rockfill dam complex borrow pit excavation volume calculation method based on grid subdivision algorithm

Examples

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Embodiment

[0108] Take the calculation of the excavated earth volume of a soil material yard of a hydropower project in Southwest China as an example:

[0109] The stockyard is located about 36km upstream of the dam site, the distribution elevation of the stockyard is 2740-2865m, and the tug-of-war height at the front edge of the stockyard is about 85m. Cultivated land and residential buildings are distributed in the stockyard, which belongs to the reservoir submerged area. The total area of ​​its partitions is about 19.5m 2 , the total volume of survey and design is about 6.81 million m 3 . as attached Figure 7 Shown is the 3D model in the stockyard area established by reverse modeling using point cloud data based on the original terrain contours. The basic principle is that the point cloud obtained by the 3D laser scanner is reversely generated by the regular triangular mesh generation algorithm to generate the triangular network of the excavation surface, and then the 3D model is...

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Abstract

An earth and rockfill dam complex borrow pit excavation volume calculation method based on a grid subdivision algorithm comprises the following steps that three-dimensional point cloud data of a borrow pit excavation face are scanned, registration of point clouds of different scanning batches is achieved through a point cloud registration algorithm, so that point clouds which are originally and irregularly distributed on the excavation face are obtained; the obtained original irregularly distributed point cloud is processed through a Doo-Sabin subdivision algorithm, and the point cloud forms a relatively regular excavation surface; then, Kriging interpolation calculation is performed to obtain a spatial point cloud participating in excavation volume calculation; a grid subdivision algorithm is compiled through MATLAB, and calculation of the excavation volume is achieved. According to the earth and rockfill dam complex borrow pit excavation volume calculation method based on the grid subdivision algorithm, the borrow pit excavation volume can be rapidly estimated, and the method has the advantages of being small in workload, relatively safe in measurement and high in efficiency.

Description

technical field [0001] The invention belongs to the technical field of earth-rock dam construction, and in particular relates to a method for calculating the excavation volume of a complex earth material field of an earth-rock dam based on a grid subdivision algorithm. Background technique [0002] In recent years, core rockfill dams have been widely used in my country due to their foundation adaptability, local materials and many other advantages. Especially in the southwest of my country, the number of core rockfill dams is more than Many, besides the Nuozhadu, Changheba and other projects that have been completed, projects such as Lianghekou and Shuangjiangkou are also under construction. The filling of core wall dams has high requirements for soil materials, and the demand is huge, and often needs to be mined from multiple stockyards. Under normal circumstances, the shape of the soil material field is different, and the shape of the mining surface and the bottom surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20G06T7/32G06F17/16
CPCG06T17/20G06T7/32G06F17/16G06T2207/10028
Inventor 徐盛胡超陈廷才周宜红
Owner CHINA THREE GORGES UNIV
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