Riverway engineering quality detection method
A technology of engineering quality and river channel, which is applied in surveying devices, surveying and navigation, structured data retrieval, etc. It can solve the problems of inaccurate detection and lack of technical specifications for multi-beam underwater terrain survey
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Embodiment example 1
[0156] Take the underwater riprap project in an important section of the Yangtze River in Jiangsu as an example. The local river slope value is between 0° and 45°, with an average value of 30°, see Figure 11 . Considering the difficulty of construction, it is necessary to reasonably classify the slope slope to deal with the random errors in construction. The slope is summarized into three grades of 18°, 27°, and 33° according to the stability of the slope, and the thickening value and reduction value. Measurement data processing is mainly based on ARCGIS, supplemented by Excel, CASS and other software. Calculate the total amount, average value, and specific range of thickening and reduction in the overall area and local area of the project in 2018 compared with 2014. (Calculation process omitted) See Table 7 for topographical changes before and after project implementation, and Table 7 shows topographical changes for a certain two phases of the underwater rock riprap pro...
Embodiment example 2
[0161] Take the local channel sand mining project in the Yangtze Estuary as an example. After processing the underwater topographic survey data in the first and fourth phases of the sand mining project, the local river erosion and deposition changes before and after sand mining are given, and the data of the terrain increase and decrease areas are respectively imported into CASS, as shown in Figure 13-1 , 13-2 shown. The study channel generally presents the erosion and deposition characteristics of "north erosion and south siltation, concave bank erosion and convex bank siltation". Calculate and count the evolution of the riverbed from the full-coverage comparison data 1: Changes in riverbed geographic elevation, see Table 8, Table 8 shows the change in riverbed geographic elevation; data imported into CASS to calculate and count the riverbed evolution 2: Riverbed volume changes, see Table 9, Table 9 shows the channel volume change, unit: 10,000 m 3 .
[0162] Table 8
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