ZHANG Huimin, LI Yanqing, YAN Yongfeng, et al. Ecological Protection Measures of Completely Weathered Granite Backfill Slope Under Different Slope Conditions[J]. 2022, 36(6): 156-162.
DOI:
ZHANG Huimin, LI Yanqing, YAN Yongfeng, et al. Ecological Protection Measures of Completely Weathered Granite Backfill Slope Under Different Slope Conditions[J]. 2022, 36(6): 156-162. DOI: 10.13870/j.cnki.stbcxb.2022.06.020.
Ecological Protection Measures of Completely Weathered Granite Backfill Slope Under Different Slope Conditions
Ecological protection measures are effective means to control the slope erosion of completely weathered granite backfill slope. Taking the completely weathered granite backfill slope of Longling section of China-Myanmar oil and gas pipeline as the research object
through the indoor artificial simulated rainfall test
under the same slope length
four soil and water conservation measures (engineering measures
plant measures
engineering + plant measures and engineering + tillage measures) with different slopes (10°
20°
30° and 40°) and the same rainfall intensity (220 mm/h) were selected to analyze the change law of soil erosion on slope surface and calculate the flow yield rate and sediment yield rate to evaluate its control effect. The results showed that: (1) The protective measures set up in different slopes could reduce flow and sediment
and the best water and soil conservation measure was engineering+plant measure. (2) The slope≤10°was basically stable under the condition of bare slope
and no protective measure was required. For 10°~20° and 20°~30° slopes
the slope protection measures of grass planting (coverage rate 100%) and grass planting+slope interception and drainage measures are effective. For slopes >30°
biological measures must be set on the slope surface on the basis of slope consolidation measures to effectively control slope erosion. (3) The threshold of slope was not fixed. The more complex the slope protection measures were
the greater the threshold was. Under different protective measures
the slope had the greatest impact on the cumulative sediment yield.
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references
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Related Author
ZHAO Hongbo
ZHOU Jinlong
SHI Bohao
TIAN Fangxiao
YU Wu
DU Yue
FANG Nufang
ZENG Yi
Related Institution
College of Resources and Environment, Xizang Agricultural and Animal Husbandry University, Linzhi, Xizang
College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation),Northwest A&F University, Yangling
University of Chinese Academy of Sciences
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling
The Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling