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| Experimental Research on the Engineering Characters of Improved Xiashu-Clay with Lime as the Embankment Filling of High-speed Railway |
| LUO Xi-yuan |
| China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan, Hubei 430063，China |
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Abstract Research purposes: The safe and stable running of high-speed train needs a sub-rail foundation of high regularity and stability. As one part of track structure, subgrade must have features of high strength and rigidity and perfect stability and durability to resist the influences of all natural elements, so it requires perfect engineering character of subgrade filling. Since there is not enough high quality filling along Beijing-Shanghai High-speed Railway, the xiashu-clay has to be improved for the filling of high-speed railway, the systematical researches are done on the engineering characteristic of improving xiashu-clay with lime as filling through doing indoor physical tests, static mechanics tests, dynamic mechanics tests and site filling tests, and the evaluation is made on the feasibility of improving xiashu-clay with lime as the embankment filling of high-speed railway.
Research conclusions: After improving with lime, the granule constitution of xiashu-clay is obviously changed, the water stability is evidently improved and the static mechanics character is obviously enhanced with excellent dynamic mechanics characteristic. The quality of the improved xiashu-clay with lime can satisfy the standard for bottom bedding of high-speed railway , the improved xiashu-clay with lime can be used as the embankment filling of high-speed railway, but the attention should be paid to the influence of lime content and water content etc in use of it.
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Received: 20 March 2008
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2008, Vol. 25 
