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| Soil loss characteristics in different types of dump during expressway construction |
| Chu Xiaoyuan1,Zhang Hongjiang1,Wang Yujie1,Jiang Yulin2,Chen Zongwei2,Chen Xueping2 |
| 1.College of Soil and Water Conservation,Beijing Forestry University,100083;2.China Academy of Transportation Sciences,100029: Beijing,China |
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Abstract Taking the Yichang part of the Hurongxi expressway as an example for studying the characteristics of soil loss of dump,the factors,such as prepicitation,soil,plant and amount of soil loss were observed.The results showed that: 1) The relation between amount of soil loss and product of prepicitation and railfall intensity was found to be a better linearity.While taking no account of other factors in affecting the soil loss of slope,with the PI increaing,the amount of soil loss gradually enlarged.2) Comparing the dump taken on the bio-measure and engineering measure with the unprotected one,soil loss of protected dump is reduced more than the unprotected dump.3) Physical composition of dump surface affects the amount of soil loss.When the dump surface damaged by rain,the content of gravel became bigger,and then the amount of soil loss would become smaller gradually.
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Received: 17 April 2006
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