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| Application of the Size Distribution Testing in the Using Red Clay into
Padding |
| PENG Guo - xi，XIONG Ling - yang，QIU Shi – ting |
| (China Railway Eryuan Engineering Group Co. Ltd，Chengdu，Sichuan 610031，China) |
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Abstract Abstract：Research purposes: Guangxi is one of the concentrating distribution areas of the red clay. In recent years， there are many infrastructures of the railway and road in this area， so the matters using red clay into embankment padding present gradually. This paper first defines and classifies there decay in the way of the size distribution test，and
solves whether or not the red clay is directly used into padding.
Research conclusions:( 1 ) According to gravel content of size distribution test，the red clay is classified into four
subclasses，which contain " high liquid limit soil"，" low liquid limit soil"，" high liquid limit soil containing gravel"
and " grave containing fine - grained soil". (2) Based on the physical and mechanical properties of the four subclasses，
the two types of red clay of 11 high liquid limit soil containing gravel" and 11 grave containing fine - grained soil" can directly be used as subgrade filling，the red clay of 11 low liquid limit soil" only can be directly used as roadbed fill in the 93 area，the red clay of 11 high liquid limit soil" may be used as roadbed fill in the 93 area after adopting the 11 package edge，drying" or " mixed gravel and lime improved" . (3) The research result has a guiding significance for the survey and design of geology in Guangxi area.
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Received: 01 July 2016
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2016, Vol. 33 
