Nature Environment and Pollution Technology

Open Access Open Access  Restricted Access Subscription Access

Study on Sand-blocking Benefits of Aeolian-Retaining Structures Along the Railway


Affiliations
1 College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, China
 

In view of the frequent occurrence of wind sand disaster in the Gobi area, engineering protection measures aimed at sand-blocking and sand-controlling along the railway are urgently needed to be constantly improved. This paper has analysed the sand-blocking benefits of three aeolian-retaining structures in actual projects through the way of theoretical analysis, wind tunnel test and numerical simulation. The results are as follows: Three engineering measures can reduce the turbulence of the flow and weaken the velocity so that the sand can be deposited easily; under the influence of the solid wall and hanging-style plate sand-retaining wall with 30% porosity, the airflow will form a wide range of vortex zone behind the barrier and there will be an increasing velocity area on the top of the aeolianretaining wall because of the effect of extrusion. So, these two structures can only be used in smaller wind velocity areas (V<12m/s), and it is also needed to take the effects of negative pressure behind the barriers into account. PE net with 55% porosity can form a more stable flow field behind the net and weaken the airflow at the same time, which is conducive to the control of the movement of sand and can avoid the erosion hazards on the ground caused by the eddy current, and the control effect of PE net on the velocity can be increased up to 15H behind the net. Considering the cost, service life and other conditions of the sand-retaining structures in the wild environment, the PE net would occupy an important position in the sand-controlling along the railway.

Keywords

Aeolian Disaster, Wind Tunnel Test, Numerical Simulation, PE Net, Wind Profile.
User
Notifications
Font Size


  • Bagnold, R.A. 1941. The Physics of Blown Sand and Desert Dunes. London, Methuen.

  • Cheng, J.J., Lei, J.Q., Li, SH.Y. and Wang, H.F. 2016a. Effect of hanging-type sand fence on characteristics of wind-sand flow fields. Wind and Structures, 22(5): 555-571.

  • Cheng, J.J., Lei, J.Q., Li, SH.Y., Wang, H.F. 2016b. Disturbance of the inclined inserting-type sand fence to wind-sand flow fields and its sand control characteristics. Aeolian Research, 21: 139-150.

  • Cheng, J.J. and Pang, Q.D. 2013. Study on the aerodynamic characteristics of the vehicles under the wind-retaining structure of the Gobi strong wind area. Railway Standard Design, 01: 01-04.

  • Ding, G.D. 2010. Wind and S and Physics (2nd Edition). Beijing: China Forestry Publishing House, pp. 65.

  • Gao, G.J., Tian, H.Q., Yao, S., Liu, T.H. and Bi, G.H. 2004. Effects of strong cross wind along Lanzhou-Xinjiang railway on the overturning stability of vehicles. Journal of the China Railway Society, 26(4): 36-40.

  • He, P. 2013. Design of railway protection engineering in blown sand area. Railway Construction, 5: 112-115.

  • Hu, P.X. 2003. A brief talk on present situation of sandy land and countermeasures in China. Forestry Science, 5: 140-146.

  • Kang, X.G., Li, S.H.Y., Ma, X.X., Wang, H.F., Lei, J.Q. and Wang, S.H.J. 2015. Comparison and analysis of sediment concentration of different combination spacing of two sand blocking nylon net. Arid Research, 2: 347-353.

  • Kang, X.G., Li, S.H.Y., Wang, H.F., Ma, X.X. and Lei, J.Q. 2015. Comparison of sediment morphology characteristics of and blocking nylon net with different combination space. Arid Area Geography, 2: 283-291.

  • Li, X.J. and Jiang, F.Q. 2016. Analysis of response law of blown sand flow to wind-retaining wall in Gobi area. Railway Standard Design, 3: 47-51+60.

  • Pang, Q.D., Liu, J.J., Cheng, J.J. and Jiang, F.Q. 2011. Study on vorticity length and sediment in windward wall of Gobi railway. Journal of Shihezi University (Natural Science Edition), 29(5): 629-632.

  • Ren, Z.S., Xu, Y.G., Wang, L.L. and Qiu, Y.Z.H. 2006. Study on the influence of strong crosswind on high velocity train operation safety. Journal of the China Railway Society, 28(6): 46-50.

  • Sun, Q.J., Wang, T., Han, Z.H.W. and Zhang, W.M. 2004. Study on blown sand hazard along northern Xinjiang railway. China Desert, 3: 182-186.

  • Xin, G.W., Cheng, J.J., Jing, W.H., Zhang, F., Wang, L. and Zhi, L.Y. 2016. Numerical simulation of flow profile’s influence on blown sand flow and sand accumulation-take the sand-retaining wall as an example. Journal of Arid Land Research, 03: 672-679.

  • Yang, M.Z.H., Yuan, X.X., Lu, Z.H.J. and Huang, H.J. 2008. Wind tunnel experimental study on aerodynamic performance of Qinghai-Tibet railway trains under strong crosswind. Experimental Fluid Mechanics, 22(1).


Abstract Views: 501

PDF Views: 0




  • Study on Sand-blocking Benefits of Aeolian-Retaining Structures Along the Railway

Abstract Views: 501  |  PDF Views: 0

Authors

Wang Lian
College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, China
Jian-jun Cheng
College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, China
Ling-yan Zhi
College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, China
Lin-gui Xin
College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, China

Abstract


In view of the frequent occurrence of wind sand disaster in the Gobi area, engineering protection measures aimed at sand-blocking and sand-controlling along the railway are urgently needed to be constantly improved. This paper has analysed the sand-blocking benefits of three aeolian-retaining structures in actual projects through the way of theoretical analysis, wind tunnel test and numerical simulation. The results are as follows: Three engineering measures can reduce the turbulence of the flow and weaken the velocity so that the sand can be deposited easily; under the influence of the solid wall and hanging-style plate sand-retaining wall with 30% porosity, the airflow will form a wide range of vortex zone behind the barrier and there will be an increasing velocity area on the top of the aeolianretaining wall because of the effect of extrusion. So, these two structures can only be used in smaller wind velocity areas (V<12m/s), and it is also needed to take the effects of negative pressure behind the barriers into account. PE net with 55% porosity can form a more stable flow field behind the net and weaken the airflow at the same time, which is conducive to the control of the movement of sand and can avoid the erosion hazards on the ground caused by the eddy current, and the control effect of PE net on the velocity can be increased up to 15H behind the net. Considering the cost, service life and other conditions of the sand-retaining structures in the wild environment, the PE net would occupy an important position in the sand-controlling along the railway.

Keywords


Aeolian Disaster, Wind Tunnel Test, Numerical Simulation, PE Net, Wind Profile.

References