Abstract
The Qinghai-Tibet Expressway is a major strategic project planned by China that will be built along the Qinghai-Tibet Engineering Corridor. At present, important traffic line projects, such as the Qinghai-Tibet Railway, have been built within this narrow corridor, particularly at the blown sand sections. How to ensure that the wind speed and its flow field between the new expressway and existing railway subgrades are not affected by each other is a priority to prevent breaking the dynamic balance of the blown sand movement of the existing subgrade, thereby avoiding aggravating or inducing new blown sand hazards and ensure the safe operation of the existing Qinghai-Tibet Railway. Therefore, defining the minimum distance of the wind speed and its flow field, which are not affected by each other, between the subgrades become a scientific problem that should be solved immediately to implement the construction of the Qinghai-Tibet Expressway. For this purpose, the minimum safe distance between the subgrades of the Qinghai-Tibet Expressway and Qinghai-Tibet Railway was investigated from the perspective of blown sand by making subgrade models for conducting wind tunnel experiments and combining the observation data of the local field. Results indicated that the minimum safe distance between the two subgrades is 45–50 times the subgrade height when the Qinghai-Tibet Expressway is located at the downwind direction of the Qinghai-Tibet Railway, and 50 times the subgrade height when the former is located at the upwind direction of the latter. These results have guiding significance for the route selection, survey, and design of the Qinghai-Tibet Expressway at the blown sand sections and for the traffic line projects in other similar sandy regions.
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References
Zhang K C, Qu J J, Han Q J, et al. Wind tunnel simulation of windblown sand along China’s Qinghai-Tibet Railway. Land Degrad Develop, 2014, 25: 244–250
Xie S B, Qu J J, Lai Y M, et al. Formation mechanism and suitable controlling pattern of sand hazards at Honglianghe River section of Qinghai-Tibet Railway. Nat Hazards, 2015, 76: 855–871
Li J, Kandakji T, Lee J A, et al. Blowing dust and highway safety in the southwestern United States: Characteristics of dust emission “hotspots” and management implications. Sci Total Environ, 2018, 621: 1023–1032
Tapponnier P, Xu Z Q, Roger F, et al. Oblique stepwise rise and growth of the Tibet Plateau. Science, 2001, 294: 1671–1677
Liu Z M, Zhao W Z. Shifting-sand control in central Tibet. AMBIO-A J Human Environ, 2001, 30: 376–380
Yan P, Dong Z B, Dong G R, et al. Preliminary results of using 137Cs to study wind erosion in the Qinghai-Tibet Plateau. J Arid Environ, 2001, 47: 443–452
Wang G X, Li Y S, Wu Q B, et al. Impacts of permafrost changes on alpine ecosystem in Qinghai-Tibet Plateau. Sci China Ser D-Earth Sci, 2006, 49: 1156–1169
Yang M X, Yao T D, Gou X H, et al. Diurnal freeze/thaw cycles of the ground surface on the Tibetan Plateau. Chin Sci Bull, 2007, 52: 136–139
Xie S B, Qu J J, Pang Y J. Dynamic wind differences in the formation of sand hazards at high- and low-altitude railway sections. J Wind Eng Ind Aerodyn, 2017, 169: 39–46
Liu L, Liu S H, Xu Z Y. Efficiency of wind erosion control measures at the Dk1562 section of the Qinghai-Tibet Railway. In: The International Specialty Conference on Science and Technology for Desertification Control. Beijing, 2006. 223–229
Zhang K C, Qu J J, Liao K T, et al. Damage by wind-blown sand and its control along Qinghai-Tibet Railway in China. Aeolian Res, 2010, 1: 143–146
Xie S B, Qu J J, Zu R P, et al. Effect of sandy sediments produced by the mechanical control of sand deposition on the thermal regime of underlying permafrost along the Qinghai-Tibet Railway. Land Degrad Develop, 2013, 24: 453–462
Zou X Y, Li S, Zhang C L, et al. Desertification and control plan in the Tibet Autonomous Region of China. J Arid Environ, 2002, 51: 183–198
Zhang C L, Zou X Y, Yang P, et al. Wind tunnel test and 137Cs tracing study on wind erosion of several soils in Tibet. Soil Tillage Res, 2007, 94: 269–282
Liu D, Wang T, Yang T, et al. Deciphering impacts of climate extremes on Tibetan grasslands in the last fifteen years. Sci Bull, 2019, 64: 446–454
Zhang M Y, Pei W S, Zhang X Y, et al. Lateral thermal disturbance of embankments in the permafrost regions of the Qinghai-Tibet Engineering Corridor. Nat Hazards, 2015, 78: 2121–2142
Shen W S, Zhang H, Zou C X, et al. Approaches to prediction of impact of Qinghai-Tibet Railway construction on alpine ecosystems alongside and its recovery. Chin Sci Bull, 2004, 49: 834–841
Wang G X, Yao J Z, Guo Z G, et al. Changes in permafrost ecosystem under the influences of human engineering activities and its enlightenment to railway construction. Chin Sci Bull, 2004, 49: 1741–1750
Xie S B, Qu J J, Mu Y H, et al. Variation and significance of surface heat after the mechanical sand control of Qinghai-Tibet Railway was covered with sandy sediments. Results Phys, 2017, 7: 1712–1721
Zhang K C, Qu J J, Niu Q H, et al. Characteristics of wind-blown sand and dynamic environment in the section of Wudaoliang-Tuotuo River along the Qinghai-Tibet Railway. Environ Earth Sci, 2011, 64: 2039–2046
Huang N, Gong K, Xu B, et al. Investigations into the law of sand particle accumulation over railway subgrade with wind-break wall. Eur Phys J E, 2019, 42: 145
He W, Huang N, Xu B, et al. Numerical simulation of wind-sand movement in the reversed flow region of a sand dune with a bridge built downstream. Eur Phys J E, 2018, 41: 53
Yan M, Wang H B, Zuo H J, et al. Wind tunnel simulation of an opencut tunnel airflow field along the Linhe-Ceke Railway, China. Aeolian Res, 2019, 39: 66–76
Hu L, Shan Y T, Chen R H, et al. A study of erosion control on expressway embankment sideslopes with three-dimensional net seeding on the Qinghai-Tibet Plateau. CATENA, 2016, 147: 463–468
Bruno L, Horvat M, Raffaele L. Windblown sand along railway infrastructures: A review of challenges and mitigation measures. J Wind Eng Ind Aerodyn, 2018, 177: 340–365
Xiao J H, Yao Z Y, Qu J J. Influence of Golmud-Lhasa section of Qinghai-Tibet Railway on blown sand transport. Chin Geogr Sci, 2015, 25: 39–50
Lai Y M, Zhang M Y, Liu Z Q, et al. Numerical analysis for cooling effect of open boundary ripped-rock embankment on Qinghai-Tibetan railway. Sci China Ser D-Earth Sci, 2006, 49: 764–772
Cheng G D, Wu Q B, Ma W. Innovative designs of permafrost roadbed for the Qinghai-Tibet Railway. Sci China Ser E-Tech Sci, 2009, 52: 530–538
Han Q J, Qu J J, Dong Z B, et al. Air density effects on aeolian sand movement: implications for sediment transport and sand control in regions with extreme altitudes or temperatures. Sedimentology, 2015, 62: 1024–1038
Han Q J, Qu J J, Dong Z B, et al. The effect of air density on sand transport structures and the adobe abrasion profile: A field windtunnel experiment over a wide range of altitude. Bound-Layer Meteorol, 2014, 150: 299–317
Bagnold R A. The Physics of Blown Sand and Desert Dunes. Mineola, New York: Dover Publications, Inc., 2005. 47–49
Chen R D, Liu X N, Cao S Y, et al. Numerical simulation of deposit in confluence zone of debris flow and mainstream. Sci China Tech Sci, 2011, 54: 2618–2628
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This work was supported by the National Natural Science Foundation of China (Grant No. 41877530), the Youth Innovation Promotion Association CAS (Grant No. 2018459). The authors would like to thank the three anonymous reviewers’ useful comments and the editor’s valuable suggestions for improving this manuscript.
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Xie, S., Qu, J., Han, Q. et al. 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. Sci. China Technol. Sci. 63, 2664–2676 (2020). https://doi.org/10.1007/s11431-020-1613-0
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DOI: https://doi.org/10.1007/s11431-020-1613-0