LI Zhen, ZHANG Wenbo, Lü Jiaorong, et al. Study on Soil Erosion of Engineering Accumulation with Structure[J]. 2022, 36(4): 53-62.
DOI:
LI Zhen, ZHANG Wenbo, Lü Jiaorong, et al. Study on Soil Erosion of Engineering Accumulation with Structure[J]. 2022, 36(4): 53-62. DOI: 10.13870/j.cnki.stbcxb.2022.04.008.
Study on Soil Erosion of Engineering Accumulation with Structure
taking the common engineering accumulation with structure in field investigation as the research background
two test materials including structural engineering accumulation and control group were designed (the control group is engineering accumulation without structures
which will be referred to as structure and accumulation for short in the later paper). Using the method of indoor rainfall simulation
the effects of rainfall intensity and rainfall field on slope runoff erosion of structure and accumulation were studied. The results show that:(1) the initial production duration decreases with the increase of rainfall intensity and rainfall field times
and the structure can delay the initial production duration
which is related to the soil characteristics and underlying surface characteristics of the structure; (2) The average runoff rate and average velocity increase with the increase of rainfall intensity and rainfall times. The average velocity and average runoff rate of the accumulation are 1.11~1.22 and1.11~1.37 times that of the structure
respectively. The time for the rapid increase and stabilization of the velocity and runoff rate of the structure is earlier and shorter than that of the accumulation; (3) The contribution rate of rainfall intensity to erosion rate
velocity and runoff rate is large
and the rainfall times is negatively correlated with erosion rate. Under all conditions
the erosion rate of structure is greater than that of accumulation
and the erosion rate and total erosion amount are 1.03~2.15 and 1.36~2.63 times of accumulation; (4) Runoff power can better describe the erosion dynamic process of structure and accumulation. The critical runoff shear force and runoff power of structure erosion are less than those of accumulation.
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Related Author
FU Suhua
LIU Baoyuan
XU Mingzhu
XU Guoce
LI Zhanbin
ZHANG Jiaxin
WANG Bin
FANG Kang
Related Institution
State Key Laboratory of Earth Surface Processes and Disaster Risk Reduction, Faculty of Geographical Science, Beijing Normal University
Faculty of Arts and Sciences, Beijing Normal University at Zhuhai
State Key Laboratory of Water Engineering Ecology and Environment in Arid Area, Xi'an University of Technology
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University
State Key Laboratory of Soil and Water Conservation and Desertification Control,College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation), Yangling