A study of erosion control on expressway embankment sideslopes with three-dimensional net seeding on the Qinghai-Tibet Plateau

Lin, Hui; Chen, Ruihua; Wen, Guo Chun; Wang, Qi; Li, Zhanbin

doi:10.1016/j.catena.2016.07.050

Cited by 11 publications

(7 citation statements)

References 22 publications

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“…Three-dimensional net seeding also held the gauze pad, turf and soil surface together. Then, a solid composite protective layer was formed [ 42 ]. The bare slope is built without artificial grass, the soil is relatively compact due to natural settlement, and the root system of the vegetation is small, so the soil bulk density is the largest.…”

Section: Resultsmentioning

confidence: 99%

“…The values presented in this study were the averages of the two repeated treatments. For multiple comparisons, the least significant difference (LSD) method was used at the 95% confidence level [ 42 ]. To determine the equations of fit for cumulative sediment yield and runoff yield, a nonlinear fitting method was applied using MATLAB R2018a software (MathWorks Inc., Natick, MA, USA).…”

Section: Methodsmentioning

confidence: 99%

“…With the reconstruction and expansion of the Qinghai-Tibet Highway in recent years, the problem of slope soil erosion requires special attention. During the construction of the highway, a large amount of excavation, backfilling, and earthworks not only caused many exposed slopes but also inevitably affected the surrounding ecological environment, including soil stability [ 41 , 42 ]. Additionally, precipitation and snowmelt converged on the surface to produce runoff.…”

Section: Introductionmentioning

confidence: 99%

“…There are many engineering protections along the Qinghai-Tibet Highway slope that have good performance for slope soil erosion in the short term [ 41 ], but will cause additional disturbances to the highway slope. The long-term protection effect is difficult to maintain under the influence of the severe climate in the Qinghai-Tibet plateau [ 42 ]. Previous studies mainly focused on specific ecological or engineering protection measures yet lack a systematic comparison.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Exploring Applicability of Different Ecological Protection Measures for Soil and Water Loss Control of Highway Slope in the Permafrost Area: A Case Study of Qinghai-Tibet Highway in China

Qin

Yang

et al. 2023

IJERPH

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A variety of slope water and soil conservation measures have been taken along the Qinghai-Tibet Highway, but the systematic comparison of their erosion control ability needs to be strengthened, especially in the permafrost area. To explore the applicability of different measures to control runoff and sediment yield, field scouring experiments were conducted for different ecologically protected slopes, including turfing (strip, block, full), slope covering (gravel, coconut fiber blanket), and comprehensive measures (three-dimensional net seeding). Compared with the bare slope, the bulk density of the plots with the ecological protection measure decreased, the moisture-holding capacity and the organic matter increased correspondingly, and the average runoff velocity also decreased. The soil loss and runoff had a similar trend of different ecological protection measures. The relationship between the cumulative runoff and sediment yield of different measures exhibited a power function, with the increase of scouring flow and the runoff reduction benefit and sediment reduction benefit in different ecological protection-measured plots showing a decreasing trend. The average runoff reduction benefit decreased from 37.06% to 6.34%, and the average sediment reduction benefit decreased from 43.04% to 10.86%. The comprehensive protection measures had the greatest protection efficiency, followed by turfing, while the cover measure had limited improvement. Soil characteristics, vegetation coverage, and the scouring inflow rate are key factors that influence protection efficiency. The results suggest that comprehensive measures and turfing be taken rather than cover measures or bare slopes. This work provides an experimental reference for ecological protection methods for highway slopes in the permafrost area.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exploring Applicability of Different Ecological Protection Measures for Soil and Water Loss Control of Highway Slope in the Permafrost Area: A Case Study of Qinghai-Tibet Highway in China

Qin

Yang

et al. 2023

IJERPH

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“…In sandy areas in particular, the disturbance of the blown sand activity is more intense after construction. Furthermore, the near-surface wind speed, wind field, and sand transport rate are significantly changed, as are the erosion, transport and accumulation conditions of wind-blown sand flow [ 4 , 5 ]. Therefore, preventing and controlling the harm caused by wind-blown sand by relying on the road surface to transport sand is difficult.…”

Section: Introductionmentioning

confidence: 99%

Characteristic Differences of Wind-Blown Sand Flow Field of Expressway Bridge and Subgrade and Their Implications on Expressway Design

Xie

Zhang

Pang

2022

Sensors

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Bridges and subgrades are the main route forms for expressways. The ideal form for passing through sandy areas remains unclear. This study aims to understand the differences in the influence of expressway bridges and subgrades on the near-surface blown sand environment and movement laws, such as the difference in wind speed and profile around the bridge and subgrade, the difference in wind flow-field characteristics, and the difference in sand transport rate, to provide a scientific basis for the selection of expressway route forms in sandy areas. Therefore, a wind tunnel test was carried out by making models of a highway bridge and subgrade and comparing the environmental effects of wind sand on them. The disturbance in the bridge to near-surface blown sand activities was less than that of the subgrade. The variation ranges of the wind speed of the bridge and its upwind and downwind directions were lower than those of the subgrade. However, the required distance to recover the wind speed downwind of the bridge was greater than that of the subgrade, resulting in the sand transport rate of the bridge being lower than that of the subgrade. The variation in the wind field of the subgrade was more drastic than that of the bridge, but the required distance to recover the wind field downwind of the bridge was greater than that of the subgrade. In the wind speed-weakening area upwind, the wind speed-weakening range and intensity of the bridge were smaller than those of the subgrade. In the wind speed-increasing area on the top of the model, the wind speed-increasing range and intensity of the bridge were smaller than those of the subgrade. In the wind-speed-weakening area downwind, the wind speed weakening range of the bridge was greater than that of the subgrade, and the wind speed-weakening intensity was smaller than that of the subgrade. This investigation has theoretical and practical significance for the selection of expressway route forms in sandy areas.

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Experimental definition and its significance on the minimum safe distance of blown sand between the proposed Qinghai-Tibet Expressway and the existing Qinghai-Tibet Railway

Xie

Han

et al. 2020

Sci. China Technol. Sci.

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A study of erosion control on expressway embankment sideslopes with three-dimensional net seeding on the Qinghai-Tibet Plateau

Cited by 11 publications

References 22 publications

Exploring Applicability of Different Ecological Protection Measures for Soil and Water Loss Control of Highway Slope in the Permafrost Area: A Case Study of Qinghai-Tibet Highway in China

Exploring Applicability of Different Ecological Protection Measures for Soil and Water Loss Control of Highway Slope in the Permafrost Area: A Case Study of Qinghai-Tibet Highway in China

Characteristic Differences of Wind-Blown Sand Flow Field of Expressway Bridge and Subgrade and Their Implications on Expressway Design

Experimental definition and its significance on the minimum safe distance of blown sand between the proposed Qinghai-Tibet Expressway and the existing Qinghai-Tibet Railway

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