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[1]WANG Guangyue,WANG Yan,XU Ni.Test and Study on Erosion Characteristics of 3D Geonet Protection Slope[J].Research of Soil and Water Conservation,2017,24(01):79-83.

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Test and Study on Erosion Characteristics of 3D Geonet Protection Slope

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 01 Page number: 79-83 Column: Public date: 2017-02-28

Title:: Test and Study on Erosion Characteristics of 3D Geonet Protection Slope

Author(s):: WANG Guangyue, WANG Yan, XU Ni; School of Civil and Hydraulic Engineering, Shandong University, Ji’nan 250061, China

Keywords:: 3D geomat; overland flow; soil erosion

CLC:: TV131;S157

DOI:: -

Abstract:: Aming to explore the erosion charateristic of 3D geonet protection slope, we quantitatively tested the erosion process and erosion characteristics of 3D geonet protection slope based on laboratory simulation runoff scouring experiments under the different slope gradients (5°, 10°, 15°, 20°, 25°, 30°) and the different flow discharges (1 m³/h, 1.5 m³/h, 2 m³/h). The experimental results show that: (1) cumulated erosion increases with the increase of slope gradients and flow discharges, at the same time, the amount of erosion occurring in the first 10 minutes takes up 70% of the total, while the sand content of overland flow fluctuates within 0.01～0.04 g/cm³ at the end of scouring period; (2) the contribution rate of cumulated erosion increases with the increase of slope gradient, while the flow discharge plays a leading role in the process; under the condition of large flow discharge, the flow discharge contribution rate of cumulated erosion is more significant than the small flow discharge; (3) the relation between cumulated erosion and slope gradients significantly follows the power function; (4) the overland flow pattern of 3D geonet protection slope is turbulent flow, and the relationship between cumulated erosion and Reynolds number can be described as: M=0.186Re^0.672 (R²=0.9429).

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