Experimental Study of the Granitic Regolith and Improved Soil
RAN Long-fei1 LIU Yang2
1 .Hainan Zhenhai Engineering Co.，Ltd of China Railway 12th Bureau Group，Haikou，Hainan 570206，China 2. China Railway Eryuan Engineering Group Co. Ltd，Chengdu，Sichuan 610031，China
Abstract：Research purposes: High speed passenger dedicated lines have strict requirements to roadbed deformation. Although fully weathered granite and its improved soil has been widely used in highway projects，however, it is still rare that the fully weathered granite and its improved soil used for high-speed railway at home and abroad. Therefore，the strength mechanism，compression feature，the water stability and the attenuation of shear strength of the granitic regolith and its improved soil are studied in this paper.
Research conclusions:From the experimental study of the granitic regolith and its improved soil，it is concluded that the plastic index decreases with the increasing of the cement:the optimum water content shows little change，however , mechanical properties of granitic regolith are increased with the increasing of the cement. The fully weathered granite and its improved soil can be used for high-speed railway，which provides a reference to the similar engineering, and there is an important theoretical value and engineering practical significance.
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2014, Vol. 31 
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